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Open Access Article
1 - Relationship between Intellectual Capital and Productivity for Companies in Tehran Stock Exchange
rohollah ghabezi mahmood mousaviAbstract: Relationship between Intellectual Capital and Productivity for Companies in Tehran Stock Exchange. In this study, the relationship between intellectual capital as an important asset and competitive advantage has been discussed with productivity of the companie MoreAbstract: Relationship between Intellectual Capital and Productivity for Companies in Tehran Stock Exchange. In this study, the relationship between intellectual capital as an important asset and competitive advantage has been discussed with productivity of the companies for Tehran Stock Exchange. To measure companies intellectual capital, two dimensions of capital efficiency (value added intellectual coefficient and its components) and value (calculated intangible value) is taken into consideration. For doing this work Information related through the years 2009 to 2013 for these companies have been collected. Hypotheses are tested by use of panel data regression. The results shows that the value added intellectual coefficient and its components (human capital efficiency, structural capital efficiency and efficiency of capital employed) have a significant and positive relationship with productivity. Also, the calculated intangible value of the company's efficiency has a significant and positive relationship only in models with fixed effects. The effect of the calculated intangible value components and value added intellectual coefficient on firm productivity, Test results shows that the efficiency of capital employed is the only factor for affecting productivity. Manuscript profile -
Open Access Article
2 - Mediating role of psychological empowerment in the relationship between perceived social support and entrepreneurial spirit of undergraduate students at University of Birjand
reyhane ebrahimabadiThe purpose of this study was to investigate the mediating role of psychological empowerment in the relationship between perceived social support and the entrepreneurial spirit of undergraduate students at University of Birjand. The research method was descriptive-corre MoreThe purpose of this study was to investigate the mediating role of psychological empowerment in the relationship between perceived social support and the entrepreneurial spirit of undergraduate students at University of Birjand. The research method was descriptive-correlational and the statistical population consisted of 8304 undergraduate students of University of Birjand, that 340 people by using simple random sampling and based on Morgan's table were selected. The Perceptual Social Support Questionnaire (Zimet et al., 1988), Spreitzer and Mishra Psychological Empowerment Questionnaire (1995), and the Patrice and Attitude Entrepreneurship Questionnaire (1394) were used. Content validity of the questionnaire was confirmed by experts. The reliability coefficients of the questionnaires were assessed by using Cronbach's alpha coefficient and 0.99 for social support, 0.98 for entrepreneurial spirit and 0.89 for psychological empowerment. Data analysis were done at descriptive level (frequency, mean, standard deviation) and inferential level (Pearson correlation, analysis of variance, regression and structural equation modeling). The results indicated that socially supported social support predicts entrepreneurial spirit (Beta=0.19), and predicts psychological empowerment (Beta= 0.42). Psychological empowerment is also a predictor of entrepreneurial spirit (Beta= 0.42). The findings showed that psychological empowerment plays a mediating role between perceived social support and entrepreneurial spirit and the research model has a good fit. According to the research results, social protection of family, friends and people has a reverse and significant relation with the entrepreneurial spirit of individuals. So that, by increasing the amount of social support, the entrepreneurial spirit of people decreases. The results also indicate a direct and significant relationship between social support and psychological empowerment. Manuscript profile -
Open Access Article
3 - Cross-layer Design for Congestion Control, Routing and Scheduling in Ad-hoc Wireless Networks with considering the Electrical Power of nodes
Hooman TahayoriAbstract Ad hoc Wireless Networks, are networks formed by a collection of nodes through radio. In wireless networking environment, formidable challenges are presented. One important challenge is connection maintenance mechanism for power consumption. In this paper, a mu MoreAbstract Ad hoc Wireless Networks, are networks formed by a collection of nodes through radio. In wireless networking environment, formidable challenges are presented. One important challenge is connection maintenance mechanism for power consumption. In this paper, a multi-objective optimal design is considered for ad-hoc networks which address the electrical power of nodes effects on cross-layer congestion control, routing and scheduling. We first formulate the rate and scheduling constraints. In this way, the multi-commodity flow variables are used. Then, resource allocation in networks with fixed wireless channel and single-rate devices is formulated. Since the electrical power of nodes effects are included in the design problem, we formulate resource allocation as utility and cost function, together in a maximization problem with those constraints. By dual decomposition, the resource allocation problem vertically decomposes into three sub-problems: congestion control, routing and scheduling. These three sub-problems interact through congestion and link price. Simulation results are included to verify the effectiveness of the proposed approach. Manuscript profile -
Open Access Article
4 - The impact of social networking ads on the desire to buy customers Through the moderating role of trust and image of perceived website (case study: aval market)
maryam akhavanThe present research studies the effect of social networking advertising on the desire to buy customers through the moderate role of trust and image of the perceived website in the first company. The research method is descriptive and survey type. The statistical popula MoreThe present research studies the effect of social networking advertising on the desire to buy customers through the moderate role of trust and image of the perceived website in the first company. The research method is descriptive and survey type. The statistical population of this research includes all customers of the first market in Tehran. The sample size was determined using the unlimited population formula of 384 people. The method of sampling is cluster sampling. The research data were collected using library and field method and the tools used in the questionnaire. The reliability of the questionnaires was confirmed by Cronbach's alpha (0.884) and the validity of the tool was confirmed by content and structure. The research data were analyzed using SPSS and Laser software and analyzed by statistical, descriptive and inferential statistics. The results of this research indicate that social networking ads, the value of social networking ads, Social networking stimulants have a positive impact on the desire to buy customers. However, the impact and customization of social networks has been rejected by the desire to buy customers. Also, the results of moderating assumptions show that the trust and image of the perceived web site significantly affects the impact of social networking ads on the willingness to buy customers. Moreover, the results show that the interaction of social networking ads and gender after adding to the meaning model Not a dude Manuscript profile -
Open Access Article
5 - مدلسازی معادلات ساختاری ارزش خلق شده در کسب و کارها
fateme hamidi naser shams -
Open Access Article
6 - Modeling structural equations of value created in businesses
fateme hamidi naser shamsThe world economy has undergone significant changes in the last two centuries, moving from an agricultural system to an industrial system. Most of the changes in the last four decades have been due to the evolution of service-based economies. The growth of more develope MoreThe world economy has undergone significant changes in the last two centuries, moving from an agricultural system to an industrial system. Most of the changes in the last four decades have been due to the evolution of service-based economies. The growth of more developed economies around the world has been in the direction of economies where the majority of services are. Manuscript profile -
Open Access Article
7 - Routing improvement to control congestion in software defined networks by using distributed controllers
saied bakhtiyari Ardeshir AzarnejadSoftware defined networks (SDNs) are flexible for use in determining network traffic routing because they separate data plane and control plane. One of the major challenges facing SDNs is choosing the right locations to place and distribute controllers; in such a way th MoreSoftware defined networks (SDNs) are flexible for use in determining network traffic routing because they separate data plane and control plane. One of the major challenges facing SDNs is choosing the right locations to place and distribute controllers; in such a way that the delay between controllers and switches in wide area networks can be reduced. In this regard, most of the proposed methods have focused on reducing latency. But latency is just one factor in network efficiency and overall cost reduction between controllers and related switches. This article examines more factors to reduce the cost between controllers and switches, such as communication link traffic. In this regard, a cluster-based algorithm is provided for network segmentation. Using this algorithm, it can be ensured that each part of the network can reduce the maximum cost (including delays and traffic on links) between the controller and its related switches. In this paper, using Topology Zoo, extensive simulations have been performed under real network topologies. The results of the simulations show that when the probability of congestion in the network increases, the proposed algorithm has been able to control the congestion in the network by identifying the bottleneck links in the communication paths of each node with other nodes. Therefore, considering the two criteria of delay and the degree of busyness of the links, the process of placing and distributing the controllers in the clustering operation has been done with higher accuracy. By doing so, the maximum end-to-end cost between each controller and its related switches, in the topologies Chinanet of China, Uunet of the United States, DFN of Germany, and Rediris of Spain, is decreased 41.2694%, 29.2853%, 21.3805% and 46.2829% respectively. Manuscript profile -
Open Access Article
8 - Investigation of the ability for removal of methylene blue cationic dye in aqueous samples using synthetic polymers
Marzieh Hasanzadeh Fariba OstovarIn this research, the ability for removal of methylene blue cationic dye using Electro active polymers based on polypyrrole (PPy) and poly (3-methylthiophene) (P3MTh) in a batch system were studied. Sawdust (SD) was made from wood, after patching, as a holder for coatin MoreIn this research, the ability for removal of methylene blue cationic dye using Electro active polymers based on polypyrrole (PPy) and poly (3-methylthiophene) (P3MTh) in a batch system were studied. Sawdust (SD) was made from wood, after patching, as a holder for coating polymers and Sodium Dodecyl Sulfate Anionic Surfactant (SDS) was used to modify the surface of the sawdust. The effects of some important parameters such as pH, initial concentration of dye and contact time were investigated. To evaluate the obtained data, adsorption isotherm curves (Langmuir and Freundlich) were used. The adsorption efficiency for methylene blue was maximized at alkaline pH. Adsorption capacity increased with increasing initial concentration and contact time. In all cases, the adsorption process complies with Langmuir isotherm and represents the homogeneous and single-layer process. Also, the adsorption capacity obtained in SD/PPy, SD /PPy / SDS and SD / P3MTh polymers were 59/52, 400 and 1000 mg/g, respectively. Based on the studies and the results obtained in this study, it was found that these polymer materials can effectively be used in waste dyes, such as textile industry, which they have the great environmental significance. Manuscript profile -
Open Access Article
9 - Study of habitat loss and fragmentation in Lisar Protected Area based on landscape ecology approach
Mohammad panahandehLandscape ecology metrics are used to describe composition and configuration of landscapes. The aim of this study was examination of habitat loss and fragmentation in Lisar Protected area in Guilan province during time period of 1990-2015.In this study , using Landsat MoreLandscape ecology metrics are used to describe composition and configuration of landscapes. The aim of this study was examination of habitat loss and fragmentation in Lisar Protected area in Guilan province during time period of 1990-2015.In this study , using Landsat images(1990-2015), after radiometric and atmospheric correction, three density classes of forest cover(10-40%,40-70% and above 70%) were produced. Reference maps and field study were applied for interpretation of images and maximum likelihood method was used for classification. Using ArcGis and Patch Analyst software, with derived metrics, trend of habitat loss and fragmentation was examined. Manuscript profile -
Open Access Article
10 - Monitoring and determination of the urban green coverage threshold based on Landsat data, Case study: Zones 1 and 6 from Shiraz city
hadi abdolazimi Hosein RoostaChanging the use of urban green cover over time can create various environmental hazards for the citizens of a city. Due to the importance of the subject, the present study intends to investigate the temporal and spatial changes of green cover in areas 1 and 6 of Shiraz MoreChanging the use of urban green cover over time can create various environmental hazards for the citizens of a city. Due to the importance of the subject, the present study intends to investigate the temporal and spatial changes of green cover in areas 1 and 6 of Shiraz metropolis using Landsat satellite images during five decades (1972 to 2019). For this purpose, after performing radiometric and atmospheric corrections, maps resulting from plant indices including NDVI, SAVI, OSAVI as well as the maximum likelihood algorithm were prepared in ENVI5 software and classified and evaluated in Spatial Information System (GIS). The results of this study showed that the area of the green cover in region 1 has decreased in terms of hectares in NDVI, SAVI, OSAVI indices respectively and also in the maximum likelihood algorithm has decreased from 1394 to 428, from 789 to 421, from 815 to 419, from 1402 to 439, respectively and in region 6 was decreased from 1374 to 858 (NDVI), from 1160 to 862 (SAVI), from 1149 to 884 hectares (OSAVI) and in the algorithm, the maximum likelihood of similarity has decreased from 1393 to 855 hectares. Investigation of threshold values of plant indices to identify urban green cover showed that the range of threshold values in NDVI was variable from 0.2 to 0.3, in SAVI was variable from 0.44 to 0.47 and in OSAVI was variable from 0.34 to 0.36 and using Pearson test in SPSS software, correlation coefficient values between NDVI, SAVI, OSAVI, maximum likelihood algorithm and the studied years were significant at the 1% level. The results of this test also indicated that there was no significant difference between the results of these methods in this study. This reduction of green cover is considered a serious danger for the citizens of Shiraz. Manuscript profile -
Open Access Article
11 - Increasing the value of collected data and reducing energy consumption by using network coding and mobile sinks in wireless sensor networks
ehsan kharatiThe wireless sensor network includes a number of fixed sensor nodes that move sink nodes to collect data between nodes. To reduce energy consumption and increase the value of collected data, it is necessary to determine the optimum route and residence location of mobile MoreThe wireless sensor network includes a number of fixed sensor nodes that move sink nodes to collect data between nodes. To reduce energy consumption and increase the value of collected data, it is necessary to determine the optimum route and residence location of mobile sinks, which increases the life of wireless sensor networks. Using network coding, this paper presents a Mixed Integer Linear Programming Model to determine the optimal multicast routing of source sensor nodes to mobile sinks in wireless sensor networks, which determines the time and location of sinks to collect maximum coded data and reduces the delay in sink movement and energy consumption. Solving this problem in polynomial time is not possible due to the involvement of various parameters and the constrained resources of wireless sensor networks. Therefore, several exploratory and greedy and fully distributed algorithms are proposed to determine the movement of sinks and their residence location based on maximizing the value of coded data and the type of data dead time. By simulating, the optimal method and the use of coding and proposed algorithms, reduce the runtime and energy consumption and increase the value of collected data and network lifetime than non-coding methods. Manuscript profile -
Open Access Article
12 - Uncertainty analysis of parameters for simulating river flow using GLUE method for a coupled land surface- hydrology model
Maryam Shafiei Javad Bazrafshan Parviz IrannejadIn recent years, the determination of the uncertainty of hydrological models in the hydrological research has been very much taken into consideration. Although the parameters of the hydrological model are usually determined by calibration, but there is considerable unce MoreIn recent years, the determination of the uncertainty of hydrological models in the hydrological research has been very much taken into consideration. Although the parameters of the hydrological model are usually determined by calibration, but there is considerable uncertainty in the model parameters. In this study, with the aim of calibration and uncertainty analysis of coupled model ALSIS-HBV, GLUE method has been used in the Karkheh basin. Determining the main source of uncertainty and identification of parameters, as well as estimating uncertainty in the results of river flow simulation are other goals of this research. The findings show that K2, Fcap, MaxBas, lp, B, degw and ttlim parameters are main sources of river flow uncertainty, and the parameters K2, Fcap, B, lp and perc are the most identifiable parameters. In general, the model's performance evaluation for river flow simulation in karkheh basin, especially in calibration period is good and acceptable, and most river flow observations are in 95% confidence intervals, Therefore, the probability distribution calculated from the river flow can be used to predict the flow of the river. Manuscript profile -
Open Access Article
13 - Generalized trust as the spiritual, how to enter the production function?
The aim of this study is that using the principles of microeconomics and the transaction costs, attempted to explain the new theoretical framework of social capital into the production function of the economy and the social capital or variable wanted to express public c MoreThe aim of this study is that using the principles of microeconomics and the transaction costs, attempted to explain the new theoretical framework of social capital into the production function of the economy and the social capital or variable wanted to express public confidence but an integral function of the economy. In this paper Family governance theory and panel data on the effects of social capital on Production -driven generalized trust in the Iran Economy have paid during the period 1375-1386.. In this study, it is examined whether the Trust as spiritual but can enter the production function production function of the economy or not? In this paper, we have tried to introduce public trust and scientific literature and the findings of our review. The index family also tried to investigate the theory of sovereignty as the key representative of social capital (generalized trust) introduce. In this study, the share of value added in the economy and the institutional structure of the economy was examined by institutional sector. The results of econometric techniques in this study showed confirm the hypothesis of a significant positive relationship between the variables of trust and production. Manuscript profile -
Open Access Article
14 - The study of geochemistry and mineralogy of the adakitic rocks in Monavvar village, North of Tabriz, NW of Iran
Mahdieh Fazelihagh Nasir Amel Ahmad JahangiryThe study area is located 35 kilometers northwest of Tabriz. Based on stratigraphic evidences, age of volcanic rocks in Monavvar area is Mio-Pliocene and Plio – Quaternary. According to geological structure, it is part of the western Alborz – Azerbaijan zone. Most of th MoreThe study area is located 35 kilometers northwest of Tabriz. Based on stratigraphic evidences, age of volcanic rocks in Monavvar area is Mio-Pliocene and Plio – Quaternary. According to geological structure, it is part of the western Alborz – Azerbaijan zone. Most of the volcanic rocks are dacite, rhyodacite, andesite, basaltic andesite and trachyandesite. In the spider diagrams these rocks show enrichment of HREE and HFSE elements over LREE and LILE, depletion and negative anomalies for Ti, Nb and Ta (TNT) and Ba/Nb, Ba/Ta. These properties indicate that their formation could occur in the continental arcs and post collisional arcs. High levels of SiO2 equal to 55 to 66 %wt, low levels of MgO, Y, Yb and Sr/Y and La/Yb represent the formation of high silica adakitic magma in the region. According to this evidence and REE distribution patterns, formation of magma was probably from asthenospheric mantle garnet – lherzolite source. Manuscript profile -
Open Access Article
15 - Impact of Entrepreneurial Ecosystem on Entrepreneurial Activity: GEM based Analysis
Hossein Torabi Masoud Kheyrandish mohsen mohammadi KhiyareMany scholars have highlighted the importance of entrepreneurship ecosystems in improving entrepreneurial activities, but, nevertheless, studies that are quantitatively analyzing the interrelationship between entrepreneurship ecosystems and their impact on increasing en MoreMany scholars have highlighted the importance of entrepreneurship ecosystems in improving entrepreneurial activities, but, nevertheless, studies that are quantitatively analyzing the interrelationship between entrepreneurship ecosystems and their impact on increasing entrepreneurial activities at various stages of entrepreneurship are very limited. Therefore, the aim of this study is to fill the gap in entrepreneurship literature and also to study the effect of these two variables in different stages of development of countries. In this regard, using data from 107 GEM countries During 2008-2017 and Generalized Momentary Econometric Model (GMM), the relationship between the components of the entrepreneurship ecosystem and economic growth has been estimated. The results showed that the impact of the financial environment on the entrepreneurial stages in the resource-based countries was negative and significant. However, the impact of entrepreneurship education, dynamics of the domestic market, social status of entrepreneurs (entrepreneurial culture) and the GDP growth have had a positive and significant impact on entrepreneurship in these countries. The results also indicate that the impact of ecosystem factors such as government policies and programs, taxes and bureaucracy, entrepreneurial education at basic and academic levels, R&D transfer, infrastructure, market dynamics and appropriate business environment have positive and significant impact on the growth of entrepreneurial activities in efficiency and innovation-driven countries. Overall, the results of this study indicate that in an ecosystem with low barriers to entry, government support policies for entrepreneurs, basic and higher education, commercial and legal infrastructure, and normative culture supporting entrepreneurship increases entreprenurial activities Manuscript profile -
Open Access Article
16 - Plant Fairies
سيد محمد برفرAmong the subset of the fairy-tales genre, there is one type classified as No. 410 under Arne-Thompson classification. The narrative is centered on a young boy attaining a magic garden gets the fruits out of which emerge beautiful fairies. The tale is narrated in differ MoreAmong the subset of the fairy-tales genre, there is one type classified as No. 410 under Arne-Thompson classification. The narrative is centered on a young boy attaining a magic garden gets the fruits out of which emerge beautiful fairies. The tale is narrated in different versions around the world. Having gathered the stories narrated among different nations, the author in this article, tires to explore the rules governing these tales, and explain their universal motifs regarding their mythological origins. According to the findings of the present article, these tales and the myths behind them are reflections of the humans’ beautiful imagination on personification and attributing life to the nature. Moreover, the magic garden which the protagonist attains could be a mythological symbol of the Paradise Lost. Manuscript profile -
Open Access Article
17 - Investigating the Role of Conceptual Metaphors in the Evolution of literary styles (Relying on Body Metaphors in Farrokhi Sistani, Anvari, and Hafiz's poems)
Mohammad Taheri Masoumeh ArchandaniThe conceptual metaphor is the mind’s technique for conceptualizing affairs. The mind tries to conceive and contemplate some intangible affairs for itself with the help of this fundamental construct. Hence, it is expected that by changing it, we will also see a change i MoreThe conceptual metaphor is the mind’s technique for conceptualizing affairs. The mind tries to conceive and contemplate some intangible affairs for itself with the help of this fundamental construct. Hence, it is expected that by changing it, we will also see a change in thought-related macro-systems. Among these macrosystems are literary styles that have many factors involved in changing them. This article tries to answer the question of how the change of conceptual metaphors in time has an effect on the change of literary styles through analytical-descriptive method. To answer it, we trace the conceptual metaphors related to the body, which include the words "hand, eye, heart and head", in a selection of poems by Farrokhi Sistani, Anvari and Hafez. By analyzing the obtained information, we conclude that conceptual metaphors have undergone significant changes over time that are in line with the evolution of literary styles and are variables affecting the evolution of styles. Manuscript profile -
Open Access Article
18 - A Study of the Semantic Parallels of the Concept of Love throughout Persian Poetry using Qualitative Content Analysis
masoume mohammadi Asghar Daadbeh Hormoz RahimhanLove is one of the most prominent concepts in Persian poetry that contains broad conceptual capacities to indirectly influence the semantic structure of the constantly transformative grounds of thought and functions of poetry. This research aims to understand whether th MoreLove is one of the most prominent concepts in Persian poetry that contains broad conceptual capacities to indirectly influence the semantic structure of the constantly transformative grounds of thought and functions of poetry. This research aims to understand whether through these transformations, the concept of love remains constant in the ever-changing semantic system or it undergoes dissociative fluctuations. Furthermore, this article tries to answer this question by approaching the poetry of different time-periods in their original form and focus on the interpretations that may arise from them. This matter gains further importance when we consider the decisive role that the concept of love plays in touching the reader’s emotions and its corresponding cultural influence throughout time. Hence, this research aims to arrive at the audience’s emotional involvement and the importance of cultural occasions by studying the concept of love in canonical works of poetry extending to different time-periods. Since the cultural occasions must correspond to their semantic parallels of the concept of love, we seek to extract these parallel meanings from the concealed concepts of Persian poetry. To arrive at these hidden components of poetry, this article views the Qualitative Content Analysis method in direct contact with thought centered content analysis. Therefore, two extensive stylistic schools of ancient and contemporary Persian poetry are studied to illustrate the semantic process that the concept of love undergoes and the scope contains some of the most important approaches of Qualitative Content Analysis such as: concealed and apparent meaning, semantic units, interpretive units, regional contents, theme and motif. This research concludes that through this process, the original semantic structure of this concept has been kept by remaining in close contact with its fundamental parallel meanings. Manuscript profile -
Open Access Article
19 - The Globalized Politics; Restructuration of Political Order in the Sphere of Globalized State
The power of the state that was constituted under the dominant Westphalia system, and characterized by the it’s supreme power according to Hegelian tenets, has changed and decreased due to the globalization process in one hand, and the postmodernism theory in the other MoreThe power of the state that was constituted under the dominant Westphalia system, and characterized by the it’s supreme power according to Hegelian tenets, has changed and decreased due to the globalization process in one hand, and the postmodernism theory in the other hand, especially regarding to the citizenship concept and international law. Globalization is such a process that globalizes politics and makes it as a network in a global village and shapes a new public sphere. In this new sphere the citizens are free from the intervention of the power possessing the sole legitimate use of power. Additionally the postmodern theory, that considers the state as one of the actors in the international relations and tries to reshape the forgotten sub-systems, form the new components of the new state. This new state is called globalized state because of the acceptance of deinstitutionalized norms in the international system and deconstruction of inflexible Westphalia system. Accordingly this article, s hypothesis is that, three lines of change, including the non-nationalized state, non stated state and politico-economic institutionalized regimes, all led to the transition of the state to the new form and content named as globalized state. Manuscript profile -
Open Access Article
20 - Stability Analysis of Networked Control Systems under Denial of Service Attacks using Switching System Theory
Mohammad SayadHaghighi Faezeh FarivarWith the development of computer networks, packet-based data transmission has found its way to Cyber-Physical Systems (CPS) and especially, networked control systems (NCS). NCSs are distributed industrial processes in which sensors and actuators exchange information bet MoreWith the development of computer networks, packet-based data transmission has found its way to Cyber-Physical Systems (CPS) and especially, networked control systems (NCS). NCSs are distributed industrial processes in which sensors and actuators exchange information between the physical plant and the controller via a network. Any loss of data or packet in the network links affects the performance of the physical system and its stability. This loss could be due to natural congestions in network or a result of intentional Denial of Service (DoS) attacks. In this paper, we analytically study the stability of NCSs with the possibility of data loss in the feed-forward link by modelling the system as a switching one. When data are lost (or replaced with a jammed or bogus invalid signal/packet) in the forward link, the physical system will not receive the control input sent from the controller. In this study, NCS is regarded as a stochastic switching system by using a two-position Markov jump model. In State 1, the control signal/packet passes through and gets to the system, while in State 2, the signal or packet is lost. We analyze the stability of system in State 2 by considering the situation as an open-loop control scenario with zero input. The proposed stochastic switching system is studied in both continuous and discrete-time spaces to see under what conditions it satisfies Lyapunov stability. The stability conditions are obtained according to random dwell times of the system in each state. Finally, the model is simulated on a DC motor as the plant. The results confirm the correctness of the obtained stability conditions. Manuscript profile -
Open Access Article
21 - Perceived ethical climate in organization: the concepts and classifications
While there are numerous organizations including moral climate, important for most organizations was perceived ethical climate and ethical behavior is affected employees. Human resources in today's world, the best competitive advantage of the company and any man more th MoreWhile there are numerous organizations including moral climate, important for most organizations was perceived ethical climate and ethical behavior is affected employees. Human resources in today's world, the best competitive advantage of the company and any man more than any other time, the theory of organization and management has become important. Human resources as much as it can help organizations compete, can also be a major obstacle in the way of organization. The research method is analytical and data collection for the library. In this study attempted to perceived ethical climate models and concepts are examined from the perspective of different theorists. Among several categories about perceived ethical climate, Victor and Cullen ethical climate theory, Vidaver and Cohen ethical climate continuum theory, the Webber theory of ethical climate and Arnaud the theory of moral decision-making processes in this study were investigated Manuscript profile -
Open Access Article
22 - Investigate the impact of Auditors ethical on the discovery of manipulated financial data
Flexibility in accounting an opportunity for the company that through the manipulation of financial information، have some abuses to cover their actual financial swing. Therefore، the aim of this study is investigate the impact of Auditors ethical on the discovery of ma MoreFlexibility in accounting an opportunity for the company that through the manipulation of financial information، have some abuses to cover their actual financial swing. Therefore، the aim of this study is investigate the impact of Auditors ethical on the discovery of manipulated financial data. For this purpose the indicators information of independence، integrity، impartiality and ethical rules on how the ethics of auditors، by means of questionnaires from the auditors and CPAs were collected and analyzed. Inferential tests results of mean and confirmatory factor analysis of structural equation showed that Auditor's ability to detect manipulated of financial information is impacted by Ethical rules of auditing، independence، impartiality and integrity and ethical aspects of the audit considerably. So that the integrity and impartiality of auditors were determined as the most important factor discovered by manipulating financial data. Manuscript profile -
Open Access Article
23 - Students Participation Pattern in Sport for all Based on Theory of Planned Training Behavior
mohammad ali ghareh Naser Zardithe goal of this research was presenting students participation pattern of Payame noor university in public sports based on theory of planned training behavior. The research was descriptive study that was done in a survey method. The statistical population consisted of Morethe goal of this research was presenting students participation pattern of Payame noor university in public sports based on theory of planned training behavior. The research was descriptive study that was done in a survey method. The statistical population consisted of students of Payame Noor University in the academic year 94-95. Statistical sample according to Morgan table was 384 people Which were selected by multi-stage clustering. The measurement tool included a modified behavioral scale of planned behavior. validty&Reliability if questionnaire were comfirmed. For inferential analysis of collected data used by Amos software and spss software version 18. The results of stepwise regression model showed that 46% of total changes in the level of participation in sport for all is dependent on three variables ; Attitude , behavior control and sport for all. Good fit indicators of Research model showed that The proposed model is well suited that means that the theory of the pattern of planned behavior can explaine student participation in sport for all. So it is suggested that sports devices to strive about doing tricks In order to strengthen the attitude , mental norms and perceived behavior controlling , along with other influential factors of Participation in sport for all, Including the provision of hardware and software infrastructure , access , financial issues , etc. to institutionalized sport for all in students. Manuscript profile -
Open Access Article
24 - Examining Effects of Quality of Work Life on Forming Knowledge-Sharing Behaviors in a Communication Research Center in Iran
Seyed Mahdi Hoseini Sarkhosh Peyman Akhavan Mohsen GarmabdaryK nowledge sharing is a key ability to achieve sustainable competitive advantage in today’s turbulent environments. Effective knowledge sharing among employees may considerably influence organizational performance of organizations. Therefore, this study intends to exam MoreK nowledge sharing is a key ability to achieve sustainable competitive advantage in today’s turbulent environments. Effective knowledge sharing among employees may considerably influence organizational performance of organizations. Therefore, this study intends to examine impacts of quality of work life on forming knowledge-sharing behavior in a research center in Iran. This is a descriptive research and an applied research from objective perspective and a survey due to data gathering method. Structural Equation Modeling (SEM) was used to analyze research hypotheses. A questionnaire was developed for measuring quality of work life, knowledge-sharing attitude, intention, and behavior based on prior research and distributed in target population. An analysis of 317 completed and valid questionnaires showed that quality of work life has a positive significant effect on knowledge-sharing attitude and behavior in studied organization. In addition, attitude toward knowledge sharing can enhance the tension toward knowledge sharing which in turn can improve real knowledge-sharing behaviors. Moreover, research findings indicated that among quality of work life dimensions, constitutionalism in work is the most influential factor of knowledge sharing. Finally, according to research findings, practical implications for managers and knowledge management practitioners as well as suggestions for future research to fill the research gap are proposed. Manuscript profile -
Open Access Article
25 - Mediating Role of Perceived Social Support between Early Maladaptive Schemas and Quality of Life
Mohammad Ali Besharat Samira Keshavarz Masoud Gholamali Lavasani Elham ArabiThe purpose of this study was to examine the mediating role of perceived social support in the relationship between early maladaptive schemas and quality of life. The method of present study was descriptive-correlational and population comprised general population of Sh MoreThe purpose of this study was to examine the mediating role of perceived social support in the relationship between early maladaptive schemas and quality of life. The method of present study was descriptive-correlational and population comprised general population of Shiraz city. Three handred and ninety one individuals (182 men, 209 women) were selected through convenience sampling method. Subjects were asked to complete the Schema Questionnaire (Young & Brown, 1999), Quality of Life Scale (WHOQOL-BREF, 1998) and Multidimensional Scale of Perceived Social Support (Zimet, et al, 1988). Data analysis was accomplished by path analysis. Results showed that perceived social support has mediating role between disconnection/ rejection domain, impaired limits domain (p<0/01) and being other-directed domain (p<0/05) with quality of life. Based on findings, it can be concluded that early maladaptive schemas influence quality of life through perceived social support. Therefore, perceived social support and early maladaptive schemas should be the core of clinical focus in improving quality of life. Manuscript profile -
Open Access Article
26 - The Role of Alexithymia to Predict High-Risk Behaviors based on Mediating Role of Perceived Social Support
marzieh farzadniaThe present research that is a descriptive and correlational study, aimed to investigate the mediating role of perceived social support in relation between Alexithymia and tendency to high-risk behaviors in master degree girl students of one of the universities in Qom c MoreThe present research that is a descriptive and correlational study, aimed to investigate the mediating role of perceived social support in relation between Alexithymia and tendency to high-risk behaviors in master degree girl students of one of the universities in Qom city who were studied in the year 2017-2016, was implemented. 470 students were selected in two phases by stratified and cluster random sampling, and completed multidimensional scale of P\perceived social support (MSPSS), Toronto alexithymia scale -20 (TAS-20), and scale of Iranian adolescents risk-taking scale (IARS). Analysis of data was done by using Pearson correlation coefficient and path analysis by using software SPSS 22 and Lisrel 8/72. According to the results, perceived social support had meaningful negative correlation with tendency to high-risk behaviors and alexithymia had meaningful positive correlation with tendency to high-risk behaviors. Path analysis showed that perceived social support had a mediating role in the relation between alexithymia and its tendency to high-risk behaviors. The findings of this research can be used to identify individuals who expose at risk and by strengthening emotional intelligence and relational and social skills, also, with strengthening perceived social support in individual with alexithymia can reduce tendency to high-risk behaviors. Manuscript profile -
Open Access Article
27 - بررسی تأثیر آموزشهاي ارائهشده در پاركهاي ترافيك بر سطح مهارت و آمادگي دانشآموزان براي مواجهه با مخاطرات محيط واقعي
پرويز نامي -
Open Access Article
28 - Numerical Approach for Solving a Difficult Nonlinear Programming problem by a Meta Heuristic Algorithm
علی اصغر توفیق منیره السادات محمودیSince exact algorithms are able to find the optimal solution exactly, they are not effective for solving the complicated and difficult optimization problem and the time of problem solving is increased exponentially; moreover approximate algorithms are able to find the a MoreSince exact algorithms are able to find the optimal solution exactly, they are not effective for solving the complicated and difficult optimization problem and the time of problem solving is increased exponentially; moreover approximate algorithms are able to find the approximate solution (which is very near to the optimal solution) for very complicated and difficult optimization problem in a short period of time. One of the well-known nonlinear programming problems is finding minimum volume ellipsoid covering a finite set of points problem. This problem is solvable for two dimensional space, however heuristic methods are even used to solve it in two dimensional space are very difficult. It would be difficult to achieve the exact solution for three dimensions or more because of huge volume of calculation. In this paper, SA algorithm is used and the problem is solved in two and three dimensions; in addition it can be used for n dimensions as well. Manuscript profile -
Open Access Article
29 - The Identify Strategies for Encouraging Employees to Use New Technologies in The Education of Tehran
محسن مردانی جابر کریمی جشنی مجید مردانی حسین مردانیThe development of modern technology increasing in recent decades has increased the competitiveness of organizations. So, pay attention and identify factors affecting the adoption of new technology is a necessity for organizations. In this study, A descriptive-survey to MoreThe development of modern technology increasing in recent decades has increased the competitiveness of organizations. So, pay attention and identify factors affecting the adoption of new technology is a necessity for organizations. In this study, A descriptive-survey to identify factors affecting the acceptance of new technology by staff education has been the city of Tehran. The survey questionnaire was prepared to collect information and expert groups, Has been director and manager. SPSS software was used to analyze the data. Pearson correlation analysis of the variables of the research hypotheses and to compare the level of education and organizational position analysis of variance was used; The results of this study indicate that all hypotheses are accepted as a result, Some factors affecting the acceptance of new technology by the staff of Tehran Education Organization, Such as: Ease of use and perceived usefulness of technology users, Subjective norms, Teach and encourage users confidence in the use of computer technology and etc to encourage employees to use the technology Manuscript profile -
Open Access Article
30 - Decreasing of gap between service quality in direction of increasing of customers, stabilized value with assistance of SERVQUAL model
مصطفی کاظمی سعیده فنودیCompetitive benefit for every service organization in current economic world is cognition of customers, needs and demands and their changes. With good recognition and knowledge of what customers want , organization can meet their expectations and demands and create gre MoreCompetitive benefit for every service organization in current economic world is cognition of customers, needs and demands and their changes. With good recognition and knowledge of what customers want , organization can meet their expectations and demands and create greater value . this effort increases perceived value behalf of customers and will has positive effect on success organization. Manuscript profile -
Open Access Article
31 - بهبود پیشبینی زمان اتمام پروژه بر مبنای اطلاعات سیستم مدیریت ارزش کسب شده
میثم جعفری اسکندری سید طه حسین مرتجی حامد نوذری -
Open Access Article
32 - The Impact of Brand Extension Success Drivers on Attitude toward Brand Extension with Role of Mediator Service Quality (Case Study: Day Bank and Service Companies with Day Brand in Isfahan City)
Ali Kazemi Hajar Rafie Azarnoosh Ansari -
Open Access Article
33 - Exploring to Moderating Role of Ethical trait On Model of Brand Affect in Banking Services
Mohammad Reza Karimi Alavijeh Amir Aslani Aslani AfrashtehResearch has shown that in the services industry, such as banking, in addition to the Perceived Quality of Service and brand trust, ethical behaviors of businesses plays a substantial role in shaping and maintaining long-term relationships between organizations and thei MoreResearch has shown that in the services industry, such as banking, in addition to the Perceived Quality of Service and brand trust, ethical behaviors of businesses plays a substantial role in shaping and maintaining long-term relationships between organizations and their customers. So, in addition to the perceived quality of service, business ethics in services can also have a positive effect on the trust and loyalty of customers. Therefore, this study first examines the relationship between the perceived quality of service, the trust and the brand's Affect, and then examines the effect of ethical traits as a moderating variable on the relationship between perceived quality of service and the trust that leads to the brand's affect. This research in terms of purpose is considered as an applied research; in terms of data collection, it is considered as a descriptive-survey research and To analyze the data and to test the research hypotheses, structural equation modeling using Smart PLS software is used. The statistical population is the Students of the Faculty of Management and Accounting of Shahid Beheshti University. 180 Structured questionnaire based on literature was administered to the target statistical sample. Simple non-probability sampling method is used. The results indicate that perceived quality of service has a significant positive impact on Brand Trust and Brand Trust is also found a predictor variable having a significantly positive impact on brand's affect. Also, the role of moderating variable of ethical traits was confirmed and it is significant. Finally the results of the modeling tests show that ethical traits also enhance trust. Manuscript profile -
Open Access Article
34 - Project Performance Management Based On Fuzzy Approach Under Uncertainty
Alireza Ghanbari Houshang Taghizadeh Soleyman Iranzadehproject management is the application of process, method, knowledge, skills and equipment to meet project requirements. Project performance management and measurement is one of the most important roles of project managers. Earned Duration Management (EDM) technique as a Moreproject management is the application of process, method, knowledge, skills and equipment to meet project requirements. Project performance management and measurement is one of the most important roles of project managers. Earned Duration Management (EDM) technique as a project management methodology is the most recent methodology in this area which unlike former techniques, use time-based data for measuring project performance which derives more realistic result in performance measurement. A novel approach proposed in this article is based on fuzzy approach which is capable to measure project performance under uncertainty using EDM methodology. in this regard, linguistic terms are used for expressing activities progress and development of EDM metrics. also, ranking fuzzy numbers in this research, out of different methods, is based on relative preference relation, however it is complicated but it reserves fuzzy messages. The proposed approach is implemented is a real sample in road construction project and the result are described. Manuscript profile -
Open Access Article
35 - Providing a model for superior value proposition with emphasis on developing a unique marketing strategy for the company using of Grounded theory
Abolfazi DanaeiThe purpose of the present study is to provide a model for creating the superior value proposition through strategic focus on designing a unique marketing strategy for the company. In this regard, the qualitative method of data theory of the foundation has been used. Th MoreThe purpose of the present study is to provide a model for creating the superior value proposition through strategic focus on designing a unique marketing strategy for the company. In this regard, the qualitative method of data theory of the foundation has been used. The statistical population of the present study is marketing professors and marketing activists of packaged food products. The interview method has been used to collect the required information. The results of qualitative data analysis with MAXQDA software show that functional value, value, interactional value and emotional value as the proposed company value, value of use and exchange value as dimensions of perceived customer value, customer satisfaction and loyalty The customer has been identified as the dimensions of the marketing outcomes and ultimately the volume of sales, market share, net profit and return on investment as aspects of the financial implications of the proposed firm's value. In addition, the outputs indicate that the company's proposed value in the number of code count and in terms of generalization and learning in the majority of respondents is a priority, which indicates the importance of this category. Afterwards, the financial, marketing, and perceived value of customers are ranked next. This suggests that in our country, the strategic perspective (value from the perspective of the company) among the food industry managers and marketing professors is more general than the marketing perspective. Manuscript profile -
Open Access Article
36 - Investigating the relationship between customer satisfaction and customer complaints and trust in the municipality of Tehran
hamidreza fouladgar abbas saghaeeIn all new models of quality, customer satisfaction is a prerequisite for achieving financial goals. A reliable indicator to measure customer satisfaction and analysis of its results can provide a comprehensive picture of the company's performance and timely planning fo MoreIn all new models of quality, customer satisfaction is a prerequisite for achieving financial goals. A reliable indicator to measure customer satisfaction and analysis of its results can provide a comprehensive picture of the company's performance and timely planning for managers. In different models of customer satisfaction measurement, there are different evaluations between complaints; customer trust and customer satisfaction. Municipalities are the important organizations in municipal services and management of each city. In this study, the relationship between customer satisfaction and customer complaints and trust in the municipality of Tehran has been investigated. The statistical pool of the current research is divided in two groups; first, are deep interview with 38 managers and connoisseurs to assessing and measuring customer satisfaction level in municipality's activities. Second, are 450 questionnaires that distributed in customers. 420 questionnaires were returned with usable data. The method of data analysis is using Structural Equations and their evaluation by confirmatory Factor Analysis method using Lisrel software and also, comparative studies were performed using SPSS software. The results showed that customers' expectations, perceived quality of services and their mental image had a positive and significant effect on customer satisfaction in Tehran municipality. Also, customer satisfaction has a positive and significant effect on trust and negative relation with complaints. Manuscript profile -
Open Access Article
37 - The effect of services provided by employees on customers' behavioral goals with the mediating role of their satisfaction (Case study: Razi Insurance customers)
hamid reza masoudiThe purpose of this study is to investigate the effect of services provided by employees on customers' behavioral goals with the mediating role of their satisfaction among Razi Insurance customers in Qazvin. A questionnaire with a five-point Likert scale was used to col MoreThe purpose of this study is to investigate the effect of services provided by employees on customers' behavioral goals with the mediating role of their satisfaction among Razi Insurance customers in Qazvin. A questionnaire with a five-point Likert scale was used to collect data, Cronbach's alpha coefficient and combined reliability were used to measure its reliability, and the extracted mean variance (AVE) was used to measure its validity. The statistical population of the study is Razi Insurance customers in Qazvin. The available sampling method and statistical sample size using Cochran's formula is 384 people. In order to describe the findings, the frequency distribution table as well as bar graphs and central indicators such as mean as well as dispersion indices such as standard deviation and variance have been used. To answer the research questions and conclude from statistical methods and different tests using SPSS22 and LISREL8.54 software, to check the normality of the data from Kolmogorov-Smirnov test, confirmatory factor analysis test to confirm Validity of the questions and structural equation modeling technique were used to evaluate the fit of the research model with the collected data. The results showed that the main services provided by employees at a rate of 0.23 on customer satisfaction, communication services provided by employees at a rate of 0.42 on customer satisfaction and also 0.36 customer on the behavioral intention of customers (behavioral intentions). . Also, 14.5% of the total effect of the main services provided by employees on customer behavioral goals and 28.5% of the total effect of communication services provided by employees on customer behavioral goals are indirectly explained by the mediating variable of customer satisfaction. Manuscript profile -
Open Access Article
38 - Investigating effect of front-line of employees’ competences on customer satisfaction with the role of moderating situational conditions (case of study: hypermi of store mashhad
وجیهه هوشیار Seyede farnaz Ahmadi saeedAbstract Today, competition in the market is accelerating, organizations to be successful and take advantage of their competitive advantage must have the capabilities, which can be used with the resources they have, valuable performance and unparalleled. On the other h MoreAbstract Today, competition in the market is accelerating, organizations to be successful and take advantage of their competitive advantage must have the capabilities, which can be used with the resources they have, valuable performance and unparalleled. On the other hand, human resources are the most important assets of organizations that help the productivity of the organization by learning knowledge and are effective in creating a competitive advantage and success of the organization in competition. This study seeks to investigate the effect of queue 1 staff competencies on customer satisfaction with the role of moderator of situation 2. The population of this study were the customers of Hypermy store in Mashhad. The sampling of this study is using Cochran's formula and 385 customers, whose data were collected through the standard questionnaire of Palacius et al. (2020). The measurement of validity from the validity of the structure gave the validity of the validity and the validity of the structure and Cronbach's alpha test was used to measure the reliability coefficient and Cronbach's alpha test was validated for variables. In this study, smart pls software was used to test the hypotheses. Because the model has two modifiers, one of which is qualitative. The results of this study indicate that the interaction competency variable of queue employees has an effect on customer satisfaction. Also, the competency variable has an effect on customer satisfaction. Employee demand variable modulates the effect of queue staff competence on customer satisfaction, but queue employee demand variable does not moderate the effect of interaction competence on customer satisfaction. In addition, store swarm variable 6 moderates the effect of queue staff competence on customer satisfaction, but store swarm variable did not have a moderating effect on the effect of queue staff interaction competence on customer satisfaction. Therefore, hyperemia store managers should provide customer satisfaction with the hypermia store by training capable employees in providing information and customer-oriented behavior in the hyperemia store. Manuscript profile -
Open Access Article
39 - Localized Content Analysis Model of Four Pillars of Knowledge Management Based on Sustainable Change Approach
Tahereh TashayoieNejad Mohsen Ghadami Mohammad Taghi Ziae Bigdeli hamide reshadatjoo Maryam KhaliliaraghiThe purpose of this study is to present a localized content analysis model of four pillars of knowledge management based on the continuous change approach. This study is the practical research in terms of orientation. The statistical population includes academic experts MoreThe purpose of this study is to present a localized content analysis model of four pillars of knowledge management based on the continuous change approach. This study is the practical research in terms of orientation. The statistical population includes academic experts and theoretical experts. Theoretical experts include university professors who are knowledgeable in the field of knowledge management. Experimental experts also include managers with more than 15 years of experience in the Export Development Bank. Non-probabilistic and purposeful methods have been used for sampling. The sampling process continued and finally 11 experts participated in this stage. Using qualitative analysis of grounded theory, a number of concepts of extraction and coding of indicators were performed. Following the research process and its quantitative part, by performing the fuzzy Delphi technique in 3 rounds, the criteria obtained from the qualitative analysis of the research were screened and validated. Then, ISM method was used to identify the relationships of the localized model of the four pillars of knowledge management based on the continuous change approach and to reflect the internal relationships between the criteria. Based on data analysis in the structural-interpretive modeling section, knowledge management (WM) is first level or dependent. The variables of organizational leadership (OL), organizational culture (OC), organizational technology (OT), organizational learning (LO) are the second level. The variable of continuous change (CC) is the third level. Finally, the variables of personal competence (SC), mental patterns (MP), shared vision (SV), team learning (TL), systemic thinking (ST) are in the fourth level. Manuscript profile -
Open Access Article
40 - چارچوبی برای ترکیب ارزیابی تأثیر اجتماعی و ارزیابی ریسک
farhad mohammadi a r f v f h e k -
Open Access Article
41 - Effectiveness of Narrative Therapy on Body Dysmorphic Concern & Perceived Self-efficacy of Female Students with Obesity & Overweight
Mahak Nagizadeh-Alamdari hadi AkbariNejhadThe aim of this study was to determine the effectiveness of narrative therapy on body dysmorphic concern and perceived self-efficacy of female students with obesity & overweight. The method of this study was semi-experimental with pre-test, post-test and follow up with MoreThe aim of this study was to determine the effectiveness of narrative therapy on body dysmorphic concern and perceived self-efficacy of female students with obesity & overweight. The method of this study was semi-experimental with pre-test, post-test and follow up with the control group. The population of the study consisted of obese female secondary school students in Jolfa city in the academic year 2019-2020. In total, 30 people selected by available sampling method and randomly divided into two groups. Members of both experimental groups received their own treatment respectively in 8 sessions of 1.5 hours. Measurement tools were body image concern inventory and Scherer self-efficacy questionnaire. Analysis of findings through repeated measures analysis of variance test. The mean of body dysmorphic concern and perceived self-efficacy of the experimental group in the pre-test were (57.60) and (48.93), respectively; The mean of body dysmorphic concern and perceived self-efficacy in the control group were (61.40) and (49.20), respectively. The results showed that in the post-test, the body dysmorphic concern score of the experimental group (51.40) decreased compared to the control group (64.40) (P<0.001); and the perceived self-efficacy score of the experimental group (56.33) compared to the group The control (49/27) was higher (P<0.001). The results also showed that in the follow-up phase, the effect of narrative therapy on body dysmorphic concern (51.47) and perceived self-efficacy (56.47) is lasting (P<0.001). . Manuscript profile -
Open Access Article
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Abbas Kebritchi -
Open Access Article
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Ehsan Alikhani -
Open Access Article
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mohammad reza kalaei -
Open Access Article
45 - Circular Symmetric Coupled Microstrip Lines
Mohammad Khalaj-AmirhosseiniIn this paper a new kind of coupled lines called circular symmetric coupled microstrip transmission lines is introduced. At first the capacitance C and inductance L matrices of this kind of microstrip lines are determined by solving the laplace’s equation using fourier MoreIn this paper a new kind of coupled lines called circular symmetric coupled microstrip transmission lines is introduced. At first the capacitance C and inductance L matrices of this kind of microstrip lines are determined by solving the laplace’s equation using fourier series method. Then by some examples the capacitance C and inductance L matrices of this kind of microstrip lines are discussed Manuscript profile -
Open Access Article
46 - An Agent-Based Parallel Programming for Grid Programming
H. DeldariComputational grids have provided the usage of computational distributed resources for computation-intensive applications. The development of programs that use these capabilities is one of the challenging issues for grid computing. In this article, an effort has been ma MoreComputational grids have provided the usage of computational distributed resources for computation-intensive applications. The development of programs that use these capabilities is one of the challenging issues for grid computing. In this article, an effort has been made in order to solve this problem by presenting mobile-agent-based parallel programming on the grid. The presentation of this model, which has been materialized by extending Alchemi™ grid infrastructure, adding agent properties and navigational commands that let the user to develop his/her program by using agents’ mobility and communication between them. In order to evaluate the system, algorithm of matrix multiplication as well as algorithm of finding the convex hull of a series of points have been implemented in the mentioned system. Manuscript profile -
Open Access Article
47 - A New Voice Packing Method to Regenerate Lost Packets
Y. darmaniThis article introduces a new voice packing scheme to transfer voice samples over the Internet. This method aims to reduce the voice quality degradation caused by lost packets as far as possible. Regenerating lost voice packets in active nodes in the network, introduces MoreThis article introduces a new voice packing scheme to transfer voice samples over the Internet. This method aims to reduce the voice quality degradation caused by lost packets as far as possible. Regenerating lost voice packets in active nodes in the network, introduces more received voice quality at the receiver side compared with the other methods. This scheme is simulated using an unreliable network with an active node, and it shows more voice quality than the other schemes even if the network loses 50 percent of packets. Manuscript profile -
Open Access Article
48 - Sensitivity Based Static Congestion Management in Competitive Electricity Markets
Mohammad Tabrizian H. Seifi M. K. Sheikh-El-EslamiCongestion management is deal with in this paper. The algorithm proposed is based on active and reactive power dispatches of critical nodes, determined from a detailed sensitivity analysis. The electricity market considered is a hybrid model, in which firm transmission MoreCongestion management is deal with in this paper. The algorithm proposed is based on active and reactive power dispatches of critical nodes, determined from a detailed sensitivity analysis. The electricity market considered is a hybrid model, in which firm transmission rights may also be observed. The proposed algorithm is assessed and its capabilities evaluated for a typical test system. Manuscript profile -
Open Access Article
49 - An Approach to Increase Internet Traffic Transmission Rate in All-Optical OPS Networks
اکبر غفارپور رهبرConsider an all-optical time-slotted OPS network in which Internet protocol has been used at upper layers. Contention is a major problem for such a network. It is shown in this paper that optical packet retransmission at the optical domain can improve Internet throughpu MoreConsider an all-optical time-slotted OPS network in which Internet protocol has been used at upper layers. Contention is a major problem for such a network. It is shown in this paper that optical packet retransmission at the optical domain can improve Internet throughput and can even reduce cost of OPS network implementation. In this technique, a copy of transmitted optical packets are saved in ingress switches and retransmitted when required, independent of TCP layer retransmission. In other words, retransmission may happen both at the optical layer and at the TCP layer. In this paper, an approach is proposed to reduce cost of OPS network implementation. In addition, Internet throughput is studied in slotted OPS network and an approach is proposed to increase Internet throughput and to improve throughput of long-hop connections. Manuscript profile -
Open Access Article
50 - Color reduction for Machine-Printed Carpet Pattern by Reinforcement Learning
M. Fateh E. Kabir M. Nili AhmadabadiAutomatic reading of carpet patterns Requires To find the original colors of the pattern in a scanned image. It includes detecting of pattern lines and reducing the number of colors in the image. Color reduction is done in two steps: Finding the best pallet and mapping MoreAutomatic reading of carpet patterns Requires To find the original colors of the pattern in a scanned image. It includes detecting of pattern lines and reducing the number of colors in the image. Color reduction is done in two steps: Finding the best pallet and mapping the image colors to the pallet colors. The accuracy of color reduction is so important that it may be required to ask for user intervention. The purpose of this study is to provide a new method in automatic color reduction with high accuracy. To achieve this target, reinforcement learning method is used which yields a 98% accuracy. This is a new method in color reduction and no one has used it yet. This method is defined with respect to the application and the amount of color reduction is such that does not degrade the accuracy. Therefore, the resulting pallet has more colors comparing to the original one. In the work reported in this article, first the grid lines of the pattern are detected. Then a single color is assigned to each box of the grid. After these steps, through the reinforcement learning method the color reduction is carried out. The results obtained from applying the proposed algorithm on some sample images are reported and discussed. Manuscript profile -
Open Access Article
51 - A Study of the University Course Timetabling Problem by Using a Hybrid of Improved Memetic and Simulated Annealing Algorithms
M. Joudaki M. A. Montazeri S. R. MousaviCourse timetabling is a complex problem, happening at the beginning of every semester at universities. One of the most important problems related to this issue is various constraints. As a result of this, timetabling is performed in various methods at different departme MoreCourse timetabling is a complex problem, happening at the beginning of every semester at universities. One of the most important problems related to this issue is various constraints. As a result of this, timetabling is performed in various methods at different departments. Many works have been performed to solve this problem which majority of them have used metaheuristic based techniques. In this paper, an algorithm is based on hybridization of improved memetic algorithm and simulated annealing algorithm is proposed. Improvement in memetic algorithm means heuristic initializes population and modification in crossover operator. Also, an operator which is called improvement is designed for improvement of created chromosomes and decrease of violation of constraints. In addition, utilization of simulated annealing will result to increase of the exploitive search ability of memetic algorithm. The experimental results which based on standard data indicate this method is more efficient in comparison with some other new methods. Manuscript profile -
Open Access Article
52 - A New Algorithm for Fast Mode-Switching and Control of TCSC in Less than Half Cycle A New Algorithm for Fast Mode-Switching and Control of TCSC in Less than Half Cycle
M. Nayeripour M. M. MansuriThyristor Controlled Series Capacitor (TCSC) has been used for various purposes such as power system stability improving and increasing of loadability, loss reduction, line impedance compensation or power flow control. Fast switching of TCSC from capacitive mode to indu MoreThyristor Controlled Series Capacitor (TCSC) has been used for various purposes such as power system stability improving and increasing of loadability, loss reduction, line impedance compensation or power flow control. Fast switching of TCSC from capacitive mode to inductive mode and vice versa following the fault and clearing of it respectively, is an essential key for improving transient and even dynamic stability of power system which have not been considered significantly. In this paper a new algorithm for fast mode-switching and control of TCSC in less than half cycle is proposed for changing capacitive to inductive mode and vice versa in less than half cycle. Simulation results show that the proposed method is faster and more reliable in different conditions than the existing method and can be used more effective in transient and dynamic stability improvement. Manuscript profile -
Open Access Article
53 - A Comprehensive Method to Secure Time Synchronization in Wireless Sensor
Z. AhmadiOne of the important requirements of sensor networks is synchronization of the nodes. The importance of time in sensor networks causes the adversary tries to disturb time synchronization by altering and faking messages, delaying or replying them, compromising the nodes MoreOne of the important requirements of sensor networks is synchronization of the nodes. The importance of time in sensor networks causes the adversary tries to disturb time synchronization by altering and faking messages, delaying or replying them, compromising the nodes and sending false messages via them. Up to now, there is no method that is able to provide both synchronization and security needs of sensor networks simultaneously. In this paper, we suggest a method that is capable to provide precise synchronization, along with low communication and computational overhead, low convergence time and high security against internal and external attacks. Simulation and analytic results show the preference of our method compared to other available methods. Manuscript profile -
Open Access Article
54 - Robustness of Speech Recognition Using Non-Linear Asymmetric Filter and Delta Spectral Characteristics
H. Farsi S. KuhimoghadamIn this paper, we propose a new feature extraction algorithm which is robust against noise. In the proposed algorithm, a non-linear filter with temporal masking are used for speech feature extraction and by applying delta spectral characteristics instead of delta cepstr MoreIn this paper, we propose a new feature extraction algorithm which is robust against noise. In the proposed algorithm, a non-linear filter with temporal masking are used for speech feature extraction and by applying delta spectral characteristics instead of delta cepstral, the accuracy of speech recognition is improved. Almost, all present Automatic Speech Recognition (ASR) systems use cepstral-delta and delta-delta characteristics for speech feature extraction. The aim of this paper is to reach the robust speech features which provide more accurate speech recognition under different noisy conditions. This is achieved by focusing on speech key features (especially non-stationary speech features) which highly differ from the noise signals. The obtaining experimental results show that the accuracy of speech recognition improves in comparison with traditional methods such as PLP and MFCC. Manuscript profile -
Open Access Article
55 - Bayesian Network Parameter Learning from Data Contains Missing Values
K. Etminani M. Naghibzadeh M. Emadi A. R. RazaviLearning Bayesian network structure from data has attracted a great deal of research in recent years. It is shown that finding the optimal network is an NP-hard problem when data is complete. This problem gets worse when data is incomplete i.e. contains missing values a MoreLearning Bayesian network structure from data has attracted a great deal of research in recent years. It is shown that finding the optimal network is an NP-hard problem when data is complete. This problem gets worse when data is incomplete i.e. contains missing values and/or hidden variables. Generally, there are two cases of learning Bayesian networks from incomplete data: in a known structure, and unknown structure. In this paper, we try to find the best parameters for a known structure by introducing the “effective parameter”, in a way that the likelihood of the network structure given the completed data being maximized. This approach can be attached to any algorithm such as SEM (structural expectation maximization) that needs the best parameters to be known to reach the optimal Bayesian network structure. We prove that the proposed method gains the optimal parameters with respect to the likelihood function. Results of applying the proposed method to some known Bayesian networks show the speed of the proposed method compared to the well-known methods. Manuscript profile -
Open Access Article
56 - An Uncertain Distributed Method for Reasoning in Ontologies
F. Anoosha B. Tork Ladani M. A. NematbakhshSemantic web has been one of the most important research areas of computer science in recent years. The concept of ontology as one of the most elements of semantic web is used to formally describe the domain knowledge and to enable the reasoning capability. Semantic web MoreSemantic web has been one of the most important research areas of computer science in recent years. The concept of ontology as one of the most elements of semantic web is used to formally describe the domain knowledge and to enable the reasoning capability. Semantic web is a distributed system and ontologies may be developed on many different nodes, so centralized reasoning is very hard or even impossible in many cases. On the other hand, since the majority of information in semantic web is uncertain, considering the notion of uncertainty in ontological reasoning is crucial. In this paper a method for distributed reasoning in uncertain ontologies is proposed. For this purpose the distributed description logic (DDL) framework and the certainty theory are considered for distributed reasoning and modeling the uncertainty respectively. To evaluate the functionality and performance of the algorithm, we developed a case study on application of the proposed method in purifying the mappings between ontologies. The results show that our algorithm makes the mappings more precise than other similar methods. Manuscript profile -
Open Access Article
57 - A Hybrid Algorithm for Terrain Simplification
F. Dabaghi Zarandi Mohammad GhodsiTerrain simplification problem is one of fundamental problems in computational geometry and it has many applications in other fields such as geometric information systems, computer graphics, image processing. Terrain is commonly defined by a set of n points in three dim MoreTerrain simplification problem is one of fundamental problems in computational geometry and it has many applications in other fields such as geometric information systems, computer graphics, image processing. Terrain is commonly defined by a set of n points in three dimension space. Major goal of terrain simplification problem is removing some points of one terrain so that maximum error of simplified surface is a certain threshold. There are two optimization goals for this problem: (1) min-k, where for a given error threshold , the goal is to find a simplification with the minimum number of points for which the error is that most , and (2) min-, where for a given number n, the goal is to find a simplification of at most m points that has the minimum simplification error. Simplification problem is NP-hard in optimal case. In this paper we present a hybrid algorithm for terrain simplification that performs in three phases. First, terrain is divided to some clusters, then any cluster is simplified independently and finally, the simplified clusters are merged. Our algorithm solves the problem in . The proposed algorithm is implemented and verified by experiments. Manuscript profile -
Open Access Article
58 - Bandwidth and Gain Extension Technique for CMOS Distributed Amplifiers Using Negative Capacitance and Resistance Cell
seyed amin alavi E. Alavi Ahmad HakimiIn this paper, a new structure composed of a negative capacitance and resistance is presented in order to increase gain and bandwidth of distributed amplifiers. The proposed structure is used at the gate transmission line of the distributed amplifier and the obtained ci MoreIn this paper, a new structure composed of a negative capacitance and resistance is presented in order to increase gain and bandwidth of distributed amplifiers. The proposed structure is used at the gate transmission line of the distributed amplifier and the obtained circuit has been simulated using 0.13µm CMOS model. The negative capacitance at the gate transmission line decreases parasitic effects of gain cells and increases amplifier bandwidth and accordingly increases voltage gain. The generated negative resistance decreases transmission lines losses and increases bandwidth. Simulated voltage gain is 15dB with ±0.5 dB gain flatness over 0.5-49 GHz frequency band. Circuit input and output are matched with 50Ω resistance; and input and output return losses are -8.15 dB and -9.2 dB, respectively. This circuit has a noise figure less than 4.6 and its power consumption is 99 mW from 1.8 V power supply. Manuscript profile -
Open Access Article
59 - A New eDLA-Based Framework for Finding Optimal Stochastic Sub-Graph
M. R. Mollakhalili Meybodi M. R. MeybodiIn this paper a new structure of learning automata which is called as extended distributed learning automata (eDLA) is introduced. A new eDLA-based iterative sampling method for finding optimal sub-graph in stochastic graphs is proposed. Some mathematical analysis of th MoreIn this paper a new structure of learning automata which is called as extended distributed learning automata (eDLA) is introduced. A new eDLA-based iterative sampling method for finding optimal sub-graph in stochastic graphs is proposed. Some mathematical analysis of the proposed algorithm is presented and the convergence property of the algorithm is studied. Our study shows that the proposed algorithm can be converge to the optimal sub-graph. Manuscript profile -
Open Access Article
60 - Application of Epsilon Variable-Multi Objective Genetic Algorithm for Multi-Objective Optimal Power Flow with TCSC
E. Afzalan M. JoorabianThis paper ε-multi objective genetic algorithm variable (εV-MOGA) to optimize cost of generation, emission and active power transmission loss of flexible ac transmission systems (FACTS) device-equipped power systems. In the proposed approach, optimal power flow problem MoreThis paper ε-multi objective genetic algorithm variable (εV-MOGA) to optimize cost of generation, emission and active power transmission loss of flexible ac transmission systems (FACTS) device-equipped power systems. In the proposed approach, optimal power flow problem is formulated as a multi-objective optimization problem. FACTS devices considered include thyristor controlled series capacitor (TCSC). The proposed approach has been examined and tested on the modified IEEE 57-bus test system. The results obtained from the proposed approach have been compared with those obtained from nondominated sorting genetic algorithm-II, multi-objective differential evolution. Manuscript profile -
Open Access Article
61 - Improving Target Coverage in Visual Sensor Networks by Adjusting the Cameras’ Field-of-View and Scheduling the Cover sets Using Simulated Annealing
B. Shahrokhzadeh M. Dehghan M. R. ShahrokhzadehIn recent years, target coverage is one of the important problems in visual sensor networks. An efficient use of energy is required in order to increase the network lifetime, while covering all the targets. In this paper, we address the Maximum Lifetime with Coverage Sc MoreIn recent years, target coverage is one of the important problems in visual sensor networks. An efficient use of energy is required in order to increase the network lifetime, while covering all the targets. In this paper, we address the Maximum Lifetime with Coverage Scheduling (MLCS) problem that maximizes the network lifetime. We develop a simulated annealing (SA) algorithm that divides the sensors’ Field-of-View (FoV) to a number of cover sets that can cover all the targets and then applies a sleep-wake scheduling algorithm. On the other hand, we have to identify the best possible FoV of sensors according to the targets’ location using rotating cameras, to reduce the solution space and find a near-optimal solution. It also provides the balanced distribution of energy consumption by introducing a new energy and neighbor generating function as well as escaping from local optima. Finally, we conduct some simulation experiments to evaluate the performance of our proposed method by comparing with well-known solutions in the literature such as greedy algorithms. Manuscript profile -
Open Access Article
62 - Using the Capabilities of XML and Materialized Views in Creating a Near Real-Time Data Warehouse
S. M. Shafaei S. M. ShafaeiA major challenge in the field of platforms and applications is how to display and combine the results of real-time and static partitions, as well as reduce the response time of on-line analytical processing queries in a near real-time data warehouse. So appropriate con MoreA major challenge in the field of platforms and applications is how to display and combine the results of real-time and static partitions, as well as reduce the response time of on-line analytical processing queries in a near real-time data warehouse. So appropriate content in a near real-time data warehouse can be produced through a common interface for the results of queries. This article provides an architecture that includes an XML/XSLT interface approach to generate appropriate content and also creating materialized views in the client side. In this architecture, providing a model-based HTML output, distribution and composition of results, are presented. In addition, two parallel approaches for incorporating the results of real-time and static partitions of near real-time data warehouse architecture are proposed. In the proposed architecture, the fundamental role of XML and its related technologies, the production and maintenance of content in near real-time data warehouse is determined. The results show that response time of on-line analytical processing queries via materialized views in the server and client side is reduced. Introduced functions for selecting materialized views in the both of client and server sides improve the storage space. Manuscript profile -
Open Access Article
63 - Optimization of Adaptive Design of Wireless Sensor Networks Using Binary Quantum-Inspired Gravitational Search Algorithm
M. Mirhosseini F. Barani H. Nezamabadi-pourIn this paper, the binary quantum-inspired gravitational search algorithm is adapted to dynamically optimize the design of a wireless sensor network towards improving energy consumption and extending the lifetime of the network, so that the application-specific requirem MoreIn this paper, the binary quantum-inspired gravitational search algorithm is adapted to dynamically optimize the design of a wireless sensor network towards improving energy consumption and extending the lifetime of the network, so that the application-specific requirements and communication constraints are fulfilled. The proposed approach is applied on a wireless sensor network used in the application of precise agriculture to monitor environmental conditions. This algorithm would present an optimal design detecting operational mode of each sensor including cluster head, high signal range, low signal range and inactive modes taking into consideration the constraints of the network. The simulation results indicate the most performance of the proposed method in comparison with binary genetic algorithm and particle swarm optimization. Manuscript profile -
Open Access Article
64 - A Near Real-Time Data Warehouse Architecture Based on Ontology
S. M. Shafaei S. M. ShafaeiData warehouse does not provide external data that are required to dynamically build after design and create the data warehouse. Therefore, analysts conduct effective analysis to find a correlation between external data and data warehouse data, and in other cases requir MoreData warehouse does not provide external data that are required to dynamically build after design and create the data warehouse. Therefore, analysts conduct effective analysis to find a correlation between external data and data warehouse data, and in other cases requires a comparison both external data and data warehouse data together. The analyst forced to repeat some past repetitive situations. This includes creating terminology, measures and comparison. In this paper, for graduates of this problem, a real-time data warehouse architecture based on ontology is proposed. Furthermore, an algorithm to reduce the response time to users’ queries using materialized views and parallel processing is proposed. A case study to demonstrate how to create correlation between external data and data warehouse data is done and the results show the correlation between external data and data warehouse data is discovered. In experiments, using both direct and parent materialized views approaches in existing data warehouse architecture, reduce response time to users’ sequential, comparative and combination queries. Manuscript profile -
Open Access Article
65 - Model-Based Classification of Emotional Speech Using Non-Linear Dynamics Features
A. Harimi A. Ahmadyfard A. Shahzadi K. YaghmaieRecent developments in interactive and robotic systems have motivated researchers for recognizing human’s emotion from speech. The present study aimed to classify emotional speech signals using a two stage classifier based on arousal-valence emotion model. In this metho MoreRecent developments in interactive and robotic systems have motivated researchers for recognizing human’s emotion from speech. The present study aimed to classify emotional speech signals using a two stage classifier based on arousal-valence emotion model. In this method, samples are firstly classified based on the arousal level using conventional prosodic and spectral features. Then, valence related emotions are classified using the proposed non-linear dynamics features (NLDs). NLDs are extracted from the geometrical properties of the reconstructed phase space of speech signal. For this purpose, four descriptor contours are employed to represent the geometrical properties of the reconstructed phase space. Then, the discrete cosine transform (DCT) is used to compress the information of these contours into a set of low order coefficients. The significant DCT coefficients of the descriptor contours form the proposed NLDs. The classification accuracy of the proposed system has been evaluated using the 10-fold cross-validation technique on the Berlin database. The average recognition rate of 96.35% and 87.18% were achieved for females and males, respectively. By considering the total number of male and female samples, the overall recognition rate of 92.34% is obtained for the proposed speech emotion recognition system. Manuscript profile -
Open Access Article
66 - A New BGP-based Load Distribution Approach in Geographically Distributed Data Centers
A. Esmaeili B. BakhshiToday, hosting services in geographically distributed data centers is very common among service provider companies, because of more efficiency of energy consumption, high availability of the system, and providing quality of service. Load distribution is the main issue i MoreToday, hosting services in geographically distributed data centers is very common among service provider companies, because of more efficiency of energy consumption, high availability of the system, and providing quality of service. Load distribution is the main issue in the geographical data centers. On the one hand, there are several architectures to distribute load between different clusters, e.g., central load balancer, DNS-based systems, and IGP based schemes; one the other hand, the optimum traffic load balancing between clusters is a very challengeable issue. The proposed solutions have different facilities to distribute incoming traffic; nevertheless, they are vulnerable in terms of propagation delay, centralized load balancer failure, and maintaining connections. In this paper, a new architecture based on BGP and Anycast routing protocols in SDN based data centers is proposed to distribute traffic loads between clusters. Simulation result shows improvement in comparison to the existing techniques. Manuscript profile -
Open Access Article
67 - Nonlinear Analysis of Jitter Transfer in Charge Pump Phase-Locked loops regarding Channel Length Modulation Effect
H. Dehbovid H. Adarang M. B. TavakoliDue to the nonlinear behavior caused by the charge pump, charge pump phase-locked loops (CPPLLs) are nonlinear systems. In an ideal charge pump, the applied current is constant; however, in practice, it is not constant due to the transistor's non-ideal effects. In this MoreDue to the nonlinear behavior caused by the charge pump, charge pump phase-locked loops (CPPLLs) are nonlinear systems. In an ideal charge pump, the applied current is constant; however, in practice, it is not constant due to the transistor's non-ideal effects. In this paper, regarding the transistor's channel length modulation effect (CLM) on charge pump’s current, the non-linear differential equation of the system is obtained and shows that the phase lock loop is a nonlinear system with memory and Voltaire Series expansion can be used to analyze it. As a result, a method for estimating a jitter transfer with a second-order filter is proposed. System level simulation is used to validate the analytical results with particular emphasis on the jitter transfer characteristics. The effect of different loop parameters has also been studied. The experiments all show excellent conformance between analytical equations and simulation results. Manuscript profile -
Open Access Article
68 - The Effect of MIMO Channel Estimator in the Precoder Design of Wireless Sensor Networks
H. Rostami A. FalahatiOne of the most important applications of wireless sensor networks was to estimate the unknown phenomenon. The cooperative activities of wireless sensors and scattered information of sensor nodes over network are used to decentralized estimation. Precoder design done on MoreOne of the most important applications of wireless sensor networks was to estimate the unknown phenomenon. The cooperative activities of wireless sensors and scattered information of sensor nodes over network are used to decentralized estimation. Precoder design done on the sensor nodes in order to provide an optimal estimate of the actual amount. Precoder design is an optimization problem. Since the channel is wireless link on the wireless sensor networks. Therefore, assuming the access of full channel state information isn't correct in this network. Since the perfect channel state information is required in the precoder design process, so the effects of the channel estimation investigated on precoder design process. On the issue of channel estimation, channel estimated by using of the known training sequence method with LS and MMSE criteria. Since power restriction is the key subject in the wireless sensor networks, therefore in this study power restriction considered in the channel estimation and precoder design problem. Manuscript profile -
Open Access Article
69 - Performance Analysis of Subband Adaptive Algorithms over Distributed Networks Based on Incremental Strategy
Mohammad S. E. Abadi A. R. Danaee M. S. ShafieeThis paper presents the problem of distributed estimation in an incremental network based on the family of normalized subband adaptive algorithms (NSAAs). The distributed NSAA (dNSAA), the distributed selective partial update NSAA (dSPU-NSAA), the distributed dynamic se MoreThis paper presents the problem of distributed estimation in an incremental network based on the family of normalized subband adaptive algorithms (NSAAs). The distributed NSAA (dNSAA), the distributed selective partial update NSAA (dSPU-NSAA), the distributed dynamic selection NSAA (dDS-NSAA), and the dSPU-DS-NSAA are introduced in a unified way. The dNSAAs have better convergence speed than distributed normalized least mean square (dNLMS) algorithm especially for colored Gaussian input of the nodes. In comparison with dNSAA, the dSPU-NSAA, and dDS-NSAA have lower computational complexity and close performance to dNSAA. Also by combination of these algorithms, the dSPU-DS-NSAA is established which is computationally efficient. In addition, a unified approach for mean-square performance analysis of each individual node is presented. This approach can be used to establish a performance analysis of classical distributed adaptive algorithms as well. The theoretical expressions for transient, and steady-state performance analysis of the various dNSAAs are introduced. The validity of the theoretical results, and the good performance of these algorithms are demonstrated by several computer simulations. Manuscript profile -
Open Access Article
70 - A Distributed Solution for Mixed Big Data Clustering
M. Mahmoudi نگین دانشپورDue to the high-speed of information generation and the need for data-knowledge conversion, there is an increasing need for data mining algorithms. Clustering is one of the data mining techniques, and its development leads to further understanding of the surrounding env MoreDue to the high-speed of information generation and the need for data-knowledge conversion, there is an increasing need for data mining algorithms. Clustering is one of the data mining techniques, and its development leads to further understanding of the surrounding environments. In this paper, a dynamic and scalable solution for clustering mixed big data with a lack of data is presented. In this solution, the integration of common distance metrics with the concept of the closest neighborhood, as well as a kind of geometric coding are used. There is also a way to recover missing data in the dataset. By utilizing parallelization and distribution techniques, multiple nodes can be scalable and accelerated. The evaluation of this solution is based on speed, precision, and memory usage criteria compared to other ones. Manuscript profile -
Open Access Article
71 - Human Activity Recognition using Switching Structure Model
Mohammad Mahdi Arzani M. Fathy Ahmad AkbariTo communicate with people interactive systems often need to understand human activities in advance. However, recognizing activities in advance is a very challenging task, because people perform their activities in different ways, also, some activities are simple while MoreTo communicate with people interactive systems often need to understand human activities in advance. However, recognizing activities in advance is a very challenging task, because people perform their activities in different ways, also, some activities are simple while others are complex and comprised of several smaller atomic sub-activities. In this paper, we use skeletons captured from low-cost depth RGB-D sensors as high-level descriptions of the human body. We propose a method capable of recognizing simple and complex human activities by formulating it as a structured prediction task using probabilistic graphical models (PGM). We test our method on three popular datasets: CAD-60, UT-Kinect, and Florence 3D. These datasets cover both simple and complex activities. Also, our method is sensitive to clustering methods that are used to determine the middle states, we evaluate test different clustering, methods. Manuscript profile -
Open Access Article
72 - A Distributed Method for Extracting Persian-English Chunks
Seyedeh Sara Mirmobin Mohammad Ghasemzadeh Amin NezaratThis research is in the field of machine translation and in relation to extraction of Persian-English chunks from bilingual corpus by Spark. In this regard, the most important challenge is that the operation must be carried out on large corpus; therefore, it requires di MoreThis research is in the field of machine translation and in relation to extraction of Persian-English chunks from bilingual corpus by Spark. In this regard, the most important challenge is that the operation must be carried out on large corpus; therefore, it requires distributed computing along with big data analysis techniques and tools. When translating text, we are usually confronted with chunks that we need to find the corresponding chunks of each one in the target language and insert it in our translation; this is accomplished by locating it in a corpus that contain the chunks and their corresponding translations. The existing methods, perform this operations in a non-distributed way, therefore while they run slowly, they cannot use a very large corpus. To overcome this shortcoming, in this research a distributed method has been presented, which also takes distance between the sections of chunks into account. The proposed method extracts all possible chunks from the input sentences in the monolingual corpus and uses the correlation coefficient to translate those chunks using the bilingual corpus. We implemented the proposed algorithm in a platform consisting of a computing cluster with sixty-four GB of memory and a twenty-four-core processor in Spark. The incorporated experimental data was a Persian and an English monolingual corpus along with an English-Persian bilingual corpus, each of which containing 100,000 sentences. Experimental results show that run time could greatly be reduced, and the quality of translation is also significantly improved. Manuscript profile -
Open Access Article
73 - Improved Realization of Controlled Unitary Gates in the One-Way Quantum Computation Model Using the Extended Measurement Calculus
M. Houshmand M. hooshmandIn one-way quantum computation model (1WQC), the quantum correlations in an entangled state, called a cluster state or graph state, are used to perform universal quantum computations using single-qubit measurements. In 1WQC, the computations are shown by measurement pat MoreIn one-way quantum computation model (1WQC), the quantum correlations in an entangled state, called a cluster state or graph state, are used to perform universal quantum computations using single-qubit measurements. In 1WQC, the computations are shown by measurement patterns or simply patterns. The synthesis problem in the 1WQC model is defined as extracting the pattern from a given arbitrary unitary matrix. The important criteria in evaluating measurement patterns in the 1WQC model, are the size, the depth and the number of entanglements of the pattern. In this paper, a new approach is proposed to synthesize controlled-unitary U gates where U is a single-qubit gate. To this end, for the first time, the idea of applying the extended measurement calculus, which utilizes the measurements in different Bloch sphere planes, is used in the synthesis of the 1WQC model. Some optimizations are proposed for this method and a new approach is presented to synthesize controlled-U gates for the 1WQC model which improves the evaluation criteria of size, depth and the number of entanglements in this model as compared to the best previous result by 9.1%, 30% and 18.1%, respectively. Manuscript profile -
Open Access Article
74 - Proposing an Intelligent Method for Design and Optimization of Double tail Comparator
Sadegh Mohammadi-Esfahrood Seyed-Hamid ZahiriThe performance of an Analog/Digital (A/D) converter, various aspects like general architecture of the converter, architecture of the building blocks or design of the blocks can be improved. The comparator block is a fundamental block in data converters. Due to contradi MoreThe performance of an Analog/Digital (A/D) converter, various aspects like general architecture of the converter, architecture of the building blocks or design of the blocks can be improved. The comparator block is a fundamental block in data converters. Due to contradicting design purposes, circuit constraints and necessities, design of comparators and obtaining best circuit performance are complicated and challenging. Such challenges in circuit design necessitate presenting approaches which not only satisfy all the objectives but also, they are cost effective in terms of time and cost. One of the approaches which has recently attracted attentions is the heuristic algorithms based intelligent Methods. Inclined Planes system Optimization algorithm (IPO) is a novel heuristic algorithm inspired by dynamic movement of the objects on frictionless inclined planes. But despite its remarkable ability for exploration and exploitation of the search space, its standard model has complex relationships with many structural parameters that often confuse the user in choosing the effective values for them. In this paper, IPO algorithm is simplified to present a heuristic algorithm (called SIPO) and its efficiency in optimization of 10 standard benchmarks has been evaluated. Then, a multi-objective version of the proposed algorithm (called MOSIPO) for design and optimization of double tail comparator is presented and its efficiency in optimization of double tail comparator has been evaluated and compared with popular multi-objective intelligent methods. The results clearly demonstrate the improved performance and superiority of SIPO and MOSIPO compared to the other methods. Manuscript profile -
Open Access Article
75 - Wireless Powered Communication System Design with Nonlinear Energy Harvester
مهرنوش میرحاج مریم مسجدی محمدفرزان صباحیIn this paper, a wireless powered communication network (WPCN) is considered, in which the hybrid access point (HAP) and the users are equipped with multiple antennas.In the downlink phase, an energy HAP transfers the energy signal to the users and in the uplink phase, MoreIn this paper, a wireless powered communication network (WPCN) is considered, in which the hybrid access point (HAP) and the users are equipped with multiple antennas.In the downlink phase, an energy HAP transfers the energy signal to the users and in the uplink phase, users apply the harvested energy to transfer their information to the HAP using spatial division multiple access (SDMA) technology. By considering the nonlinear behavior of energy harvester in system design and aiming to maximize the sum of the rates, we propose an optimal method for designing energy pre-coding matrices, user information pre-coding matrices, and time devoted to the downlink and uplink phases. For this purpose, we rewrite the problem as a convex optimization problem by appropriate change of variables and propose a method to solve it. The simulation results show that in practical scenarios, employing the nonlinear energy harvesting model in the system design could reduce the transmitted energy, increase and the sum rate of the users. Manuscript profile -
Open Access Article
76 - A Reduced Data Transfer Scheme in Distributed Secondary Control of Microgrid Using Aperiodic Sampling Method
Mohyedin Ganjian-Abukheili مجید شهابی Qobad ShafieeThe steady state error in voltage amplitude and frequency and improper reactive power sharing are main disadvantages of droop control in primary level of control of distributed resources (DERs) in microgrid. Secondary control can compensate these problems. In contrary t MoreThe steady state error in voltage amplitude and frequency and improper reactive power sharing are main disadvantages of droop control in primary level of control of distributed resources (DERs) in microgrid. Secondary control can compensate these problems. In contrary to centralize control, distributed secondary control may bring merits such as reliability, flexibility and scalability improvement. The distributed secondary control is usually implemented using consensus algorithm whose communication network is very important. Communication network is usually modeled continuously with a constant transfer rate. In this paper, the consensus algorithm with communication network are implemented in discrete domain because of discrete nature of them. Two aperiodic data transfer strategies state dependent and state independent are also proposed for releasing communication network burden where data rate is not fixed. Time delay as a non-desirable effect is evaluated. The proposed method applied on an islanded microgrid, and simulation results show the effectiveness of the proposed method. Manuscript profile -
Open Access Article
77 - Coordinated Design of Power System Stabilizer and Variable Impedance Devices to Increase Damping of Inter-Area Modes Using Genetic Algorithm
m. zamani G. ShahgholianPower system stabilizer (PSS) does not have a significant impact on inter-area modes and FACTS devices are used to damping these modes and to enhance power system stability. In this article, an objective function based on different and variable weight coefficients accor MorePower system stabilizer (PSS) does not have a significant impact on inter-area modes and FACTS devices are used to damping these modes and to enhance power system stability. In this article, an objective function based on different and variable weight coefficients according to eigenvalues condition is proposed and optimization parameters of power system stabilizer and variable impedance parameters include static VAR compensator (SVC) and thyristor controlled series capacitor (TCSC), (Including amplifying gain rate and time constant of phase-compensating blocks) is done using genetic algorithm in harmony. Also, in the process of optimization, the location of the FACTS devices and the control signal are considered as optimization parameters. Simulation results on IEEE 68-bus system show improvement damping of inter-area modes using the proposed method. Manuscript profile -
Open Access Article
78 - A New High Speed Easily Expandable Digital Multiplication Algorithm without Pipeline
ebrahim hosseini Morteza MousazadehThis paper proposes a new high speed low power algorithm for unsigned digital multiplier without pipeline which could be easily expanded to a wider number of bits. The blocks of multiplier works in parallel which significantly increase the speed of multiplier. In propos MoreThis paper proposes a new high speed low power algorithm for unsigned digital multiplier without pipeline which could be easily expanded to a wider number of bits. The blocks of multiplier works in parallel which significantly increase the speed of multiplier. In proposed algorithm, the input bits of multiplier, are divided into smaller groups of bits which multiplication of these groups are in parallel and simultaneously. This division continues until the minimum number of input bits which is 2×2. In calculating the product of each category, the proposed algorithm is used, which leads to acceleration of the product of each category.The final result will be obtained from the sum of these smaller categories.Modified tree adder have been used to add smaller groups, which can increase the multiplication speed. Multipliers with input bit lengths of 64, 32, 16, 8, 4, and 2 have been implemented using the proposed algorithm in 180 nm and 90 nm technology, which its delay and power consumption with bit length of 32 in 180 nm are 3.05 ns and 40 mW respectively. In 90 nm technology and with the 32 bit length the delay is 1.53 nm and power consumption is 9.7 mW. Also, using the proposed method, it is estimated that the delay of 128×128 bits multiplier in the 180 nm and 90 nm technology are equal to 5.4ns and 2.5ns, respectively. According to the results and in comparison with other works reported in the articles and in the same process, without increasing the power consumption and with a silicon area of 1.5 times, the proposed multiplication speed has increased more than 2 times. Manuscript profile -
Open Access Article
79 - A New Algorithm Based on Distributed Learning Automata for Solving Stochastic Linear Optimization Problems on the Group of Permutations
mohammadreza mollakhalili meybodi masoumeh zojajiIn the present research, a type of permutation optimization was introduced. It is assumed that the cost function has an unknown probability distribution function. Since the solution space is inherently large, solving the problem of finding the optimal permutation is com MoreIn the present research, a type of permutation optimization was introduced. It is assumed that the cost function has an unknown probability distribution function. Since the solution space is inherently large, solving the problem of finding the optimal permutation is complex and this assumption increases the complexity. In the present study, an algorithm based on distributed learning automata was presented to solve the problem by searching in the permutation answer space and sampling random values. In the present research, in addition to the mathematical analysis of the behavior of the proposed new algorithm, it was shown that by choosing the appropriate values of the parameters of the learning algorithm, this new method can find the optimal solution with a probability close to 100% and by targeting the search using the distributed learning algorithms. The result of adopting this policy is to decrease the number of samplings in the new method compared to methods based on standard sampling. In the following, the problem of finding the minimum spanning tree in the stochastic graph was evaluated as a random permutation optimization problem and the proposed solution based on learning automata was used to solve it. Manuscript profile -
Open Access Article
80 - Reliable and Energy Efficient Deployment Optimization of Internet of Things Applications in Cloud and Fog Infrastructure by Using Cuckoo Search Algorithm
Yaser Ramzanpoor میرسعید حسینی شیروانیDeployment applications of internet of things (IoT) in fog infrastructure as cloud complementary leads effectively computing resource saving in cloud infrastructure. Recent research efforts are investigating on how to better exploit fog capabilities for execution and su MoreDeployment applications of internet of things (IoT) in fog infrastructure as cloud complementary leads effectively computing resource saving in cloud infrastructure. Recent research efforts are investigating on how to better exploit fog capabilities for execution and supporting IoT applications. Also, the distribution of an application’s components on the possible minimum number of fog nodes for the sake of reduction in power consumption leads degradation of the service reliability level. In this paper, a hybrid meta-heuristic algorithm based on cuckoo search algorithm is presented for static deployment the components of IoT applications on fog infrastructure in the aim of trade-off between efficient power usage, reduction in the effect of one point of failure and boosting the application reliability against failure. The results of simulations show that the proposed approach in this paper reduces the power consumption of fog network and meets the quality of service requirement of IoT application with the high reliability level. Manuscript profile -
Open Access Article
81 - Double Recycling Folded Cascode Op-Amp Using Feed-Forward Capacitor Coupling Driving
Mohammad R. Ali Ali Khamesi NaeiniA double recycling Op-Amp based on a simple recycling folded cascode Op-Amp is presented. The proposed Op-Amp has significantly improved performance compared to a recycling folded cascode. In the proposed Op-Amp, those cascode output current sources of recycling folde MoreA double recycling Op-Amp based on a simple recycling folded cascode Op-Amp is presented. The proposed Op-Amp has significantly improved performance compared to a recycling folded cascode. In the proposed Op-Amp, those cascode output current sources of recycling folded cascode that still have a constant value have been considered and have taken on a dynamic state through capacitive couplings in the path created between the input and output of the amplifier. DC gain, unity-gain bandwidth, and slew rate have been improved compared to the previous amplifier at the same power consumption. Simulation results using the 0.18μm CMOS technology show a DC gain enhancement of 6dB, 35% improvement in slew rate, and almost a 30% increase the bandwidth compared to the traditional recycling folded cascode Op-Amp. Also, smaller input-referred noise is achieved. Simulated results of proposed circuit show the values of SR, power consumption and DC gain are about 93.5 V/µs, 1.02mW and 68.3 dB respectively. Manuscript profile -
Open Access Article
82 - Design and Simulation of an ESIW H-plane Horn Antenna with High Gain and Improved Bandwidth
سید حسین حقیرالسادات محمدحسن نشاطيIn this paper by using the radiation slots, the half power beam width (HPBW) of the SIW horn antenna is reduced in E-plane and the radiation pattern is improved. In addition to keeping the dimensions of the structure constant, these slots can have a significant effect o MoreIn this paper by using the radiation slots, the half power beam width (HPBW) of the SIW horn antenna is reduced in E-plane and the radiation pattern is improved. In addition to keeping the dimensions of the structure constant, these slots can have a significant effect on the characteristics of the antenna. Also placing the reflector plate at a suitable distance from aperture and slots leads to improve side lobe levels (SLLs) and front to back ration (FTBR). Then, to improve the impedance matching and increase the bandwidth of the antenna, the dielectric of the structure is completely removed and non-radiation slots added to the upper and lower plate of the antenna. Removing the insulation, increasing the bandwidth of the antenna compared to a conventional SIW horn and adding radiation slots significantly improves the gain of the antenna. The simulation results shows that the proposed antenna in this paper covers the frequency range of 27.2 GHz to 28.3 GHz and its gain changes between 10.1 dBi to 15.3 dBi with 98% radiation efficiency in this range. Finally, in order to increase the gain of the antenna, a two-dimensional array of the proposed antenna with suitable feeding structure is designed in the H-plane. Manuscript profile -
Open Access Article
83 - Design, Simulation and Implementation of Compact and Wideband Microwave Filter Using Semi-Hexagonal Cavity by Substrate Integrated Waveguide (SIW) Technology
m.h. n. Rasoul RahmaniIn this paper, a compact wideband microwave filter in X band using substrate integrated waveguide technology is designed, simulated and implemented. At first, the structure of hexagonal and semi-hexagonal microwave resonators is studied and their resonate modes, resonan MoreIn this paper, a compact wideband microwave filter in X band using substrate integrated waveguide technology is designed, simulated and implemented. At first, the structure of hexagonal and semi-hexagonal microwave resonators is studied and their resonate modes, resonance frequencies and field distribution inside these resonators are investigated. Then, a second order Chebyshev filter is designed by coupling matrix of two semi-hexagonal cavities with center frequency of 10 GHz and fractional bandwidth of 20%. The first designed filter based on theoretical modeling is simulated by a full wave simulator and the geometrical parameters of the structure are adjusted for the required response. A prototype of the designed filter is implemented by TLY031 substrate and its characteristics are successfully measured. The results show that the measured results agree well with those obtained by simulation. The center frequency of the implemented filter is 8.7 GHz and it provides 27.3% bandwidth, with maximum insertion loss of 2.1 dB. Manuscript profile -
Open Access Article
84 - Provide a Personalized Session-Based Recommender System with Self-Attention Networks
Azam Ramazani A. ZarehSession-based recommender systems predict the next behavior or interest of the user based on user behavior and interactions in a session, and suggest appropriate items to the user accordingly. Recent studies to make recommendations have focused mainly on the information MoreSession-based recommender systems predict the next behavior or interest of the user based on user behavior and interactions in a session, and suggest appropriate items to the user accordingly. Recent studies to make recommendations have focused mainly on the information of the current session and ignore the information of the user's previous sessions. In this paper, a personalized session-based recommender model with self-attention networks is proposed, which uses the user's previous recent sessions in addition to the current session. The proposed model uses self-attention networks (SANs) to learn the global dependencies among all session items. First, SAN is trained based on anonymous sessions. Then for each user, the sequences of the current session and previous sessions are given to the network separately, and by weighted combining the ranking results from each session, the final recommended items are obtained. The proposed model is tested and evaluated on real-world Reddit dataset in two criteria of accuracy and mean reciprocal rank. Comparing the results of the proposed model with previous approaches indicates the ability and effectiveness of the proposed model in providing more accurate recommendations. Manuscript profile -
Open Access Article
85 - Studying the Effect of Employee Assistance Programs (EAPs) on Work – Family Balance (WFB) in Refah Bank
Aryan gholipourToday's work environment is competitive with complex and different activities. Organizations need appropriate strategies for different parts ,in order to work in such environments and to realize their goals. These strategies are implemented by human resources or human c MoreToday's work environment is competitive with complex and different activities. Organizations need appropriate strategies for different parts ,in order to work in such environments and to realize their goals. These strategies are implemented by human resources or human capital, and they are critical factors for the success of the organization. So readiness, abilities and effectiveness of these resources are important for organization .In fact, employees are faced with different problems that can effect on their workplace and family performance. So the mechanisms are required to offer solutions to these problems. One of these mechanisms is Employees Assistance Programs (EAPs) that are created in order to help to solve their employees and family member problems. Among of these problems, we can consider the Work – Family Balance (WFB) issue and its importance in today's organization. Existence of balance between all of these areas will have a positive effect on performance at work and family life. Refah K. Bank has recognized the importance of employees and it offers some EAPs to them. One of the problems of Refah K. Bank that has created the importance of addressing the issue of work – family balance, is employees’ overtime and its consequences for the bank.According to what was said, the main research question was: “Do EAP are influencing on WFB for employees of Refah Bank?” 385 questionnaires were distributed among Refah Bank employees. The research method of this study was Survey method and Regression analysis was used to analyze the data. The results show that EAPs are influencing on WFB by reducing Work- Family Conflict (WFC) and increasing Work- Family Enrichment (WFE). Manuscript profile -
Open Access Article
86 - Integrated Modeling of Bidirectional Solid-State Transformers: Rectifier, DC to DC Converter and Inverter Stages
hamed molla-ahmadian morteza shafiei javid khorasani: One of the new and growing equipment in modern power networks is solid state or power electronic transformer. These types of transformers are based on power semiconductor switches and high frequency transformers. Compared to traditional transformers, it has several ca More: One of the new and growing equipment in modern power networks is solid state or power electronic transformer. These types of transformers are based on power semiconductor switches and high frequency transformers. Compared to traditional transformers, it has several capabilities such as the ability to operate with input voltage variations in amplitude and frequency, automatic regulation of output voltage and input power factor correction. The investigated transformer has the ability to transfer power in both directions and has three stages, including the rectifier, the middle stage and the inverter stage. This transformer has a large number of semiconductor switches and its modeling, analysis, design and simulation is difficult and complex. In particular, real-time simulation of these transformers with conventional models is not possible. In these cases, the use of averaging theory seems to be the appropriate solution. In this paper, the averaging theory is applied to a solid-state transformer and its modeling is done in a simple and powerful way with the ability to study real-time, transient and steady states performance. The proposed modeling includes differential equations and equivalent circuits and offers an integrated transformer model with the ability to study the interaction between stages as a part of power system. The presented models are used in simulation of smart grids, DC microgrids and connection of distributed generation sources to the grid, as well as analysis and design of solid-state transformer behavior in areas such as renewable energies and electrical transportation. In addition to the proposed modeling, the closed-loop control structure has been implemented for all three stages. Transformer simulation is performed by implementing differential equations in SIMULINK/MATLAB software and verified the proposed model. Manuscript profile -
Open Access Article
87 - Effect of Semantic Relevance and Emotional Valence on Associative Word Recognition
siavash talepasndAbstract: The aim of this study was to inves-tigate the effect of semantic relevance and emotional valence on associative word recogni-tion. To do so, single design with a post-test was used. The population consisted of all students in Semnan University in 2013. Partici MoreAbstract: The aim of this study was to inves-tigate the effect of semantic relevance and emotional valence on associative word recogni-tion. To do so, single design with a post-test was used. The population consisted of all students in Semnan University in 2013. Participants were 80 undergraduate students (43 males and 37 females) from the two faculties of psychology and education, and engineering of Semnan Univer-sity, who were chosen via conventionce method. By making use of SuperLab software, partici-pants completed a computer test that offered pairs of words and also Wechsler Memory Scale-Revised (WMS-R). Analysis of covari-ance of repeated measurements was used. Findings indicated the effect of semantic rele-vance and emotional valence on associative words recognition (F=7/64, P<0/001). Whereas pairs of neutral words with semantic relation were presented, the highest recognition was ob- served, pairs of emotional words with no seman-tic relation brought about lowest recognition rate. The results showed that the semantic rela-tionship between pairs of words, compared to the emotional valence of them (positive or ne-gative), had a greater impact on recognition. Manuscript profile -
Open Access Article
88 - Effects of Social Skills Group Intervention Based on DeRosier Program on Decreasing Externalizing Behavior Problems in Autistic Children with High Functioning
Ahmad Afsaneh Rahimi Ahmad Abedi salar faramarziDue to the increased prevalence of autism spectrum disorder, professionals need to access and study programs which are de-signed to improve fundamental problems of these children. The present study has inves-tigated the effectiveness of a social skills group interventio MoreDue to the increased prevalence of autism spectrum disorder, professionals need to access and study programs which are de-signed to improve fundamental problems of these children. The present study has inves-tigated the effectiveness of a social skills group intervention based on DeRosier Program for decreasing externalizing behavior problems in children with high functioning autism. The study was done as a single-subject design using the A-B-A method. The statistical population consisted of children with high-func-tioning autism in Isfahan. Three students were selected using a purposeful sampling. The base-lines were drawn up using a subscale of Externalizing Behavior Problems (Social Skills Improvement System Rating Scales) (SSIS). There were 20 training sessions, each for 40 minutes which were held by the researcher. The evaluations were completed during the treatment and followed up by one the child specialist teacher one month later. Based on the results of the visual analysis of the data, this program has been effective in reducing behavioral problems (PND for participants respectively, 100%, 85.71%, and 100%). The results from PEM, NAP, TauU (at least 0.85%) indicate the effectiveness of this program. Therefore, the improvement of social skills in a group-based intervention has led to the growth of positive communicative experiences and reduced be-havioral problems for this group of children. Manuscript profile -
Open Access Article
89 - Coping Styles and Critical Thinking Skills of Students with Perceived Stress of Earthquake
Fariborz NikdelThe present study aimed to investigate the relationship between coping styles and critical thinking skills of university students with their perceived stress after Yasouj earthquake (April 2018). The research method was non-experimental and correlational. Statistical po MoreThe present study aimed to investigate the relationship between coping styles and critical thinking skills of university students with their perceived stress after Yasouj earthquake (April 2018). The research method was non-experimental and correlational. Statistical population of the study consisted of students of Yasouj universities in the academic year of 2017-18. The sample of the study included 280 students selected through multistage cluster random sampling. Perceived Stress Scale (PSS), California Critical Thinking Disposition Inventory (CCTDI), and Coping Innventry for Stressful Situations (CISS) were administered. The results showed that there was a negative and significant relation-ship between problem-oriented coping style and students' perceived stress. Also, there was a positive and significant relationship between students' emotion-oriented coping style and their perceived stress. The relationship between avoidant coping style and students' perceived stress was not significant. Critical thinking had significant negative relationship with students' perceived stress. The results of step wise regression analysis showed that emotion-oriented coping style, critical thinking, and problem-oriented coping style were respectively predictors of students' perceived stress. Manuscript profile -
Open Access Article
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Fatemeh Rafiemanzelat -
Open Access Article
91 - Evaluation of Risk Indicators Affecting Consumer TV Shopping Behavior
Bagher Asgarnezhad Nouri Ebrahim Ebrahimzadeh Allahyar Beigi FirooziTV shopping is a form of non-store business that, despite its remarkable growth and optimistic outlook, has more of its negative aspects. Consumers worry about buying a product from "anonymous" sellers without physically testing the products. Therefore, it is assumed th MoreTV shopping is a form of non-store business that, despite its remarkable growth and optimistic outlook, has more of its negative aspects. Consumers worry about buying a product from "anonymous" sellers without physically testing the products. Therefore, it is assumed that people may feel a certain degree of risk when buying a product online. Accordingly, the current study aims to assess the risk indicators affecting the behavior of television purchases in Iran. To have this type of purchase, was selected. In this study, a standard questionnaire was used online and the data were analyzed using SPSS software and structural equation modeling method in Smart Pls software. According to the research literature, 6 types of risks that could affect consumers' TV buying behavior were identified, and based on the results, it was determined that financial, operational and time risks affect shopping behavior. Based on the results, it can be said that the perception of risk in TV shopping affects consumer buying behavior and high level of this risk (s) can prevent the purchase of goods through this channel, so TV marketers need to be diligent in identifying, reducing and minimizing the risks perceived by the consumer by building trust and confidence. Manuscript profile -
Open Access Article
92 - A Two-Level Method Based on Dynamic Programming for Partitioning and Optimization of the Communication Cost in Distributed Quantum Circuits
zohreh davarzani maryam zomorodi-moghadam M. HoushmandNowadays, quantum computing has played a significant role in increasing the speed of algorithms. Due to the limitations in the manufacturing technologies of quantum computers, the design of a large-scale quantum computer faces many challenges. One solution to overcome t MoreNowadays, quantum computing has played a significant role in increasing the speed of algorithms. Due to the limitations in the manufacturing technologies of quantum computers, the design of a large-scale quantum computer faces many challenges. One solution to overcome these challenges is the design of distributed quantum systems. In these systems, quantum computers are connected to each other through the teleportation protocol to transfer quantum information. Since quantum teleportation requires quantum resources, it is necessary to reduce the number of that. The purpose of this paper is to present a distributed quantum system considering the two goals of balanced distribution of qubits and minimizing the number of teleportation protocols in two levels. In the first level, by presenting a dynamic programming algorithm, an attempt has been made to distribute qubits in a balanced manner and reduce the number of connections between subsystems. According to the output partitioning obtained from the first level, in the second level and in the stage of implementation of global gates, when one of the qubits of this gate is teleported from the home to the desired destination, this qubit may be able to be used by a number of global gates, observing the precedence restrictions and as a result it reduces the number of teleportations. The obtained results show the better performance of the proposed algorithm. Manuscript profile -
Open Access Article
93 - Distributed Target Tracking by Solving Average Consensus Problem on Sensor Network Measurements
Iman Maghsudlu Meysam r. Danaee Hamid ArezumandIn this paper, a new algorithm is presented to drastically reduce communication overhead in distributed (decentralized) single target tracking in a wireless sensor network. This algorithm is based on a new approach to solving the average consensus problem and the use of MoreIn this paper, a new algorithm is presented to drastically reduce communication overhead in distributed (decentralized) single target tracking in a wireless sensor network. This algorithm is based on a new approach to solving the average consensus problem and the use of distributed particle filters. For the algorithm of this paper, unlike the common algorithms that solve an average consensus problem just to approximate the global likelihood function to calculate the particle importance weights in distributed tracking, a new model for observation is presented based on the Gaussian approximation, which only solves the problem Consensus is applied to the mean on the received observations of the nodes in the network (and not to approximate the global likelihood function). These innovations significantly reduce the exchange of information between network nodes and as a result uses much less energy resources. In different scenarios, the efficiency of the proposed algorithm has been compared with the centralized algorithm and the distributed algorithm based on the graph, and the simulation results show that the communication overhead of the network is greatly reduced in exchange for an acceptable drop in tracking accuracy by using our proposed algorithm. Manuscript profile -
Open Access Article
94 - The Impact of Perceived Value and Sense of Place on Tourist Loyalty (Case Study: Hamedan Province)
mostafa taheriThe objective of this paper is to analyze the factors that impact tourist loyalty from two perspectives: “perceived value” and “sense of place”. The study aims to answer the following questions: Are there any relations between the dimensions of perceived value and sense MoreThe objective of this paper is to analyze the factors that impact tourist loyalty from two perspectives: “perceived value” and “sense of place”. The study aims to answer the following questions: Are there any relations between the dimensions of perceived value and sense of place with loyalty to the destination brand? If so, to what extent are they correlated? Which dimensions play a more important role? Sample size was determined by using Cochran’s formula. A total of 384 questionnaires were randomly destributed between tourists in Hamedan Province during summer 2016. Given the Pearson correlation coefficients, the dimensions of perceived value (Functional, emotional, and social value) and sense of place (identity, dependence, and attachment) were found to be associated with tourist loyalty to destination brand. Standardized R2 was 45.9 and nearly 45 percent of the variation in tourist loyalty was explained by the model. Perceived Functional value and sense of dependence were the strongest predictors of loyalty, followed by perceived emotional value, social value, sense of attachment, and sense of identity, respectively. Manuscript profile -
Open Access Article
95 - The Effect of the Perceived Value of a Brand Image on Purchase Intention Case: Bojnord Candy Souvenir
narges ahanchian zahra noriThe perceived value of a brand is a basic concept for brand purchase and is considered as a valuable and necessary asset. Marketers need to identify the effective factors on brand purchase intention to promote their products and aim for improving the perceived value of MoreThe perceived value of a brand is a basic concept for brand purchase and is considered as a valuable and necessary asset. Marketers need to identify the effective factors on brand purchase intention to promote their products and aim for improving the perceived value of the brand. This study tried to test the concept in tourism and test the effect of the perceived value of tourists on purchase intention (candy) and brand image. The statistical population was all the tourists who visited the city of Bojnord. Based on Krejcie and Morgan sampling table, 384 tourists were selected randomly. A localized questionnaire was used to collect data. Using structural equation modeling and LISREL, the study investigated the conceptual model and the research hypotheses. The results showed that the perceived value of tourists had a positive and significant effect on the brand image and purchase intention toward the candy. Tourists’ mental image had also a positive and significant effect on the purchase intention. The results showed that the tourism marketers could increase the tendency of tourists to purchase Bojnord candy by improving the index of the perceived value of the candy and by making efforts to brand these local souvenirs, which could lead to developing the tourism industry. Manuscript profile -
Open Access Article
96 - Exploring the Effect of Perceived Forgiveness Climate on Female Practitioners of Tourism Industry
Fariborz Rahimnia Farshad GhaderiAs Women who form almost half of each society’s population significantly contribute to the fulfillment of national goals, their effective role in the service sector of societies is becoming increasingly important. While the positive impact of forgiveness climate on orga MoreAs Women who form almost half of each society’s population significantly contribute to the fulfillment of national goals, their effective role in the service sector of societies is becoming increasingly important. While the positive impact of forgiveness climate on organizational performance has been confirmed, many organizations have neglected this factor in their performance improvement. This applied survey research, therefore, sought to investigate the effect of perceived forgiveness climate on the efficiency of service recovery through the mediating role of psychological safety and organizational fairness. The population of the study consisted of 390 female employees who were selected from four and five-star hotels of Mashhad. The findings of this study indicated that perceived forgiveness climate had a positive and significant impact on women’s psychological safety and organizational fairness. It was also found that psychological safety and organizational fairness were effective in the efficiency of service recovery. Moreover, the mediating role of psychological safety and organizational fairness was also confirmed. Manuscript profile -
Open Access Article
97 - The Impact of Crowding on Tourist Satisfaction in Urban Destinations: A Case Study of Tabriz Bazaar
Abolfazl Haghverdizadeh Naser Sanoubar Akbar Ghasemi Saeedeh Khani"As tourist satisfaction plays a significant role in the economic prosperity of tourism industry, researchers are seeking to identify the various influential factors in that regard. While the findings of some studies indicate a negative impact of overcrowding on visitor More"As tourist satisfaction plays a significant role in the economic prosperity of tourism industry, researchers are seeking to identify the various influential factors in that regard. While the findings of some studies indicate a negative impact of overcrowding on visitors satisfaction, other studies suggest that the collective sense may affect the directionality of overcrowding effect. This study, therefore, sought to examine the effect of overcrowding on the satisfaction of visitors with the intervening role of the collective sense. Applying a descriptive-quantitative method based on library and field studies, the required data for the study were collected through surveying 384 visitors of the historical Tabriz Bazaar who visited there from March to April 2018. Moreover, structural equations and SMART PLS software were used for analyzing the collected data. The findings of the study indicated that overcrowding had a positive impact on the perception of the collective sense. Furthermore, although many visitors found overcrowding unpleasant, such factors as the joy of being together, the feeling of sympathy with other people, and the opportunity to establish widespread social communications with other tourists made the collective sense act as an intervening variable, ending in the visitors’ satisfaction. The results of this study could be used in planning the development of tourism and preparing touring packages, especially for rare tourist destinations. " Manuscript profile -
Open Access Article
98 - Designing a model to control deviant behavior among hotel staff with respect to perceived organizational support, burnout and job satisfaction
Shahed Zandipak Rabeah Zandipak*Perceived organizational support, burnout, and job satisfaction are variables that can be effective in predicting the extent of deviant behaviors in the organization. The aim of this study was to investigate the role of perceived organizational support and burnout on de MorePerceived organizational support, burnout, and job satisfaction are variables that can be effective in predicting the extent of deviant behaviors in the organization. The aim of this study was to investigate the role of perceived organizational support and burnout on deviant behavior mediated by job satisfaction. The present study is applied in terms of purpose, descriptive-survey in terms of nature and method. To test the hypotheses, a questionnaire consisting of 21 questions arranged according to the Likert 7-choice spectrum was used. The statistical population of the study includes the staff of three, four and five star hotels in Mashhad with more than 1000 people; The sample size was 278 people, which was selected based on Krejcie and Morgan table by relative stratification method and Cronbach's alpha coefficient was calculated using Spss software and confirmatory factor analysis was used to evaluate the validity of the structure using Lisrel software. In order to analyze the findings, the path analysis model was used and to analyze the mediating variable, the Sobel test was used. The results showed that perceived organizational support and burnout can have a significant direct and indirect effect on deviant behavior. To investigate the role of the mediator variable, the Sabel test method was used, which showed that job satisfaction plays the role of the mediator variable in the relationship between other variables. Manuscript profile -
Open Access Article
99 - Tourism, Perceived Travel limitations, Seligman's Helplessness Theory, Disabled People
Maedeh Hashemi Zahra NadalipourWhile leisure limitations have long been the subject of research, there has recently been a growing trend in academic studies that examine such limitations in terms of tourism and disability. However, as those studies are merely limited to the identification and elabora MoreWhile leisure limitations have long been the subject of research, there has recently been a growing trend in academic studies that examine such limitations in terms of tourism and disability. However, as those studies are merely limited to the identification and elaboration of the barriers and limitations., the current study sought to investigate the influence of such limitations on the target population. Therefore, based on the study conducted by Lee et al. (2012), the current study set out to investigate the effect of perceived travel limitations on the tourism tendency of physically disabled individuals living in Tehran, Iran, using Seligman's Helplessness Theory. The required data for this applied, descriptive-analytical correlational study was collected through a survey using a researcher-developed questionnaire. The statistical population of the study comprised all physically disabled people, those suffering from spinal cord injury, and war-disabled individuals living in Tehran, out of whom 383 people were selected as the sample size using the convenience sampling method. The findings of the study indicated that tourism limitations perceived by the disabled residents of Tehran did not significantly affect their tourism tendencies. On the other hand, the perceived tourism limitations exerted a positive influence on their learned helplessness. Finally, the learned helplessness of people with disabilities negatively affected their intention to travel. The results of the present study can be used by relevant institutions such as Tehran's municipality, those responsible for urban management, and institutions in charge of the affairs of disabled people. Manuscript profile -
Open Access Article
100 - Investigating the Effect of Error Treatment Atmosphere on Willingness to Quit Jobs in Female Staff: A Case Study of Four and Five-Star Hotels in Mashhad
Ismail Malekakhlagh Farshad GhaderiConstituting half of society, women play a significant role in advancing the goals of different countries in this new social age. On the other hand, as organizations, especially the service-providing ones, are potentially subject to errors, they need to provide an appro MoreConstituting half of society, women play a significant role in advancing the goals of different countries in this new social age. On the other hand, as organizations, especially the service-providing ones, are potentially subject to errors, they need to provide an appropriate environment for treating possible errors. Therefore, this applied survey study sought to investigate the effect of an error treatment atmosphere on the willingness to quit one’s job, considering learning behavior as the mediating factor. The statistical population of the study comprised female staff of four and five-star hotels in Mashhad, out of whom 390 people were selected as participants. Moreover, the required data were collected through a questionnaire, whose form and content validity were evaluated and verified by management experts and its construct validity was measured and confirmed using the confirmatory factor analysis in Amos software. Also, the reliability of different constructs of the questionnaire was confirmed, as the reported Cronbach's alpha coefficient was over 0.7. The findings of the study indicated the positive influence of error management and perceived forgiveness atmosphere on the staff’s learning behavior, with their effect rate being 0.48 and 0.57, respectively. On the other hand, error management atmosphere, perceived forgiveness atmosphere, and learning behavior had a significant influence on reducing the willingness of the staff to quit their jobs, with their effect rates being -0.34, -0.20, and -0.28, respectively. Moreover, the mediating role of the learning behavior in the causal relationships between the error management atmosphere and the willingness to quit one’s job, and between the perceived forgiveness atmosphere and such a willingness was confirmed, with the former and latter’s effect rate being -0.13 and -0.16, respectively. Manuscript profile -
Open Access Article
101 - Perceived Authenticity, Satisfaction, Revisiting, Cultural Heritage Tourism, Kourd House, Sanandaj
akbar pourfaraj sasan ahmadiWhile many scholars believe that tourists take the trouble to visit authentic destinations away from their place of residence, few studies have so far been conducted in this regard. Therefore, this study sought to investigate the role of perceived authenticity on touris MoreWhile many scholars believe that tourists take the trouble to visit authentic destinations away from their place of residence, few studies have so far been conducted in this regard. Therefore, this study sought to investigate the role of perceived authenticity on tourists' satisfaction and revisiting intention. To this end, perceived authenticity was divided into objective, structural, and existential categories based on the analysis of the related literature review. Moreover, the study was conducted in the Kourd House Ethnology Museum of Sanandaj. On the other hand, to collect the required data, a valid questionnaire was administered to 224 tourists who visited the place. Finally, the collected data were analyzed through SPSS20 software using Partial Least Squares Structural Equation Modeling (PLS-SEM). The results indicated that objective, structural, and existential authenticity positively influenced tourists’ satisfaction. However, it was merely the objective and existential authenticity that exerted a positive effect on the tourists’ intention to revisit the place. Moreover, tourists’ satisfaction was also found to have a positive influence on their revisiting intention. Manuscript profile -
Open Access Article
102 - Stock Price Movement Prediction Using Directed Graph Attention Network
Alireza Jafari Saman HaratizadehPrediction of the future behavior of the stock market has always attracted researchers' attention as an important challenge in the field of machine learning. In recent years deep learning methods have been successfully applied in this domain to improve prediction perfor MorePrediction of the future behavior of the stock market has always attracted researchers' attention as an important challenge in the field of machine learning. In recent years deep learning methods have been successfully applied in this domain to improve prediction performance. Previous studies have demonstrated that aggregating information from related stocks can improve the performance of prediction. However, the capacity of modeling the stocks relations as directed graphs and the power of sophisticated graph embedding techniques such as Graph Attention Networks have not been exploited so far for prediction in this domain. In this work, we introduce a framework called DeepNet that creates a directed graph representing how useful the data from each stock can be for improving the prediction accuracy of any other stocks. DeepNet then applies Graph Attention Network to extract a useful representation for each node by aggregating information from its neighbors, while the optimal amount of each neighbor's contribution is learned during the training phase. We have developed a novel Graph Attention Network model called DGAT that is able to define unequal contribution values for each pair of adjacent nodes in a directed graph. Our evaluation experiments on the Tehran Stock Exchange data show that the introduced prediction model outperforms the state-of-the-art baseline algorithms in terms of accuracy and MCC measures. Manuscript profile -
Open Access Article
103 - Socio-cultural impact assessment of establishing Marvdasht sports complex (Tehran municipal region7)
Khalil Mirzaei Marjan Pakdaman Farzad Abbasi neda AzimiThe present study seeks to respond to Qasr-Heshmatieh neighborhood residents’ needs regarding sports facilities. Some of the most important goals of this project include impacts such as direct and indirect empowering and informing the residents on health issues, providi MoreThe present study seeks to respond to Qasr-Heshmatieh neighborhood residents’ needs regarding sports facilities. Some of the most important goals of this project include impacts such as direct and indirect empowering and informing the residents on health issues, providing access to sports facilities, establishing public spaces and increasing social interactions in those spaces, increasing perceived safety and health for the residents of Qasr-Heshmatieh neighborhood due to the existence of a safe place for doing sports, improving residents’ physical health due to easier accessibility to sports facilities and equipment compared to the past, increasing the visits from other parts of the region to use the facilities and building new interaction, etc. The present study is descriptive in terms of process and applied in terms of the research objective. Documentary and field study were also used for data collection. However, it must be mentioned that the present study can also be categorized among assessment studies. The establishment of Marvdasht sports complex in Tehran municipal region 7 has both positive and negative impacts. The positive impacts include increasing social relations, social capital, safety for women, health, participation in sports activities, reducing addiction rate, change in the lifestyle, employment, creation of new jobs, revenue gain for the municipality, and reducing noise from teenagers and the youth, while negative impacts include environmental pollution, increased traffic, parking space shortage, and congestion and crowdedness in the neighborhood. Manuscript profile -
Open Access Article
104 - Polyoxymetal / polymer composites An overview of synthesis methods and their properties
Marziyeh Kavian Milad Ghani Jahan Bakhsh RaoofThis article gives an overview of the manufacturing method and properties of composites containing polyoxymetals / polymers. Polyoxometals (POMs) are discrete, molecular, metal oxide clusters of various sizes ranging from one to several nanometers that exhibit different MoreThis article gives an overview of the manufacturing method and properties of composites containing polyoxymetals / polymers. Polyoxometals (POMs) are discrete, molecular, metal oxide clusters of various sizes ranging from one to several nanometers that exhibit different topologies and diverse chemical and electronic properties. POMs show very strong acidity, which makes them effective acid catalysts for specific reactions such as esterification, hydrolysis, Friedel-Craft alkylation, and tetrahydrofuran ring-opening polymerization. The integration of mineral components with polymer matrices will combine the properties of the mineral phase with polymers and create new functions. Mineral micrometer building blocks have been used to enhance mechanical strength, improve thermal and chemical stability, and improve the performance of polymeric materials. With the rapid development of nanotechnology, polymers can also be used as a substrate for the stabilization of nanostructures, which will eventually have the properties of nanostructures and polymer substrates at the same time. Methods such as physical composition, electrostatic adsorption, covalent bonding, and supermolecular modification are the main methods for combining POM in organic or inorganic polymer matrices (eg silica). Polyoxymetal / polymer composites have various properties such as unique optical, electrical or catalytic properties of polyoxymetals and the optimal processing and stability of polymer matrices. POM/ polymer composites may have many applications in optics, electronics, biology, medicine and catalysis Manuscript profile -
Open Access Article
105 - Proposing a Detection and Mitigation Approach for DDoS Attacks on SDN-Based IoT Networks
fatemeh MotieShirazi Seyedakbar MostafaviInternet of Things (IoT) is a network of objects on which objects can communicate with other objects. The Internet of Things is currently constantly under numerous attacks due to technical, legal and human problems. One of the most important of these attacks is the Deni MoreInternet of Things (IoT) is a network of objects on which objects can communicate with other objects. The Internet of Things is currently constantly under numerous attacks due to technical, legal and human problems. One of the most important of these attacks is the Denial of Service (DoS) attack, in which normal network services are out of service and it is impossible for objects and users to access the server and other resources. Existing security solutions have not been able to effectively prevent interruption attacks in Internet of Things services. Software-oriented network (SDN) is a new architecture in the network based on the separation of the control and data plane of the network. Programmability and network management capability by SDN can be used in IoT services because some IoT devices send data periodically and in certain time intervals. SDN can help reduce or prevent the data flood caused by IoT if properly deployed in the data center. In this article, a method to detect DDoS attacks in Internet of Things based on SDN is presented and then an algorithm to reduce DDoS attacks is presented. The proposed method is based on the entropy criterion, which is one of the most important concepts in information theory and is calculated based on the characteristics of the flow. In this method, by using two new components on the controller to receive incoming packets and considering the time window and calculating entropy and flow rate, a possible attack is detected in the network, and then based on the statistics of the flow received from the switches, the certainty of the attack is determined. Compared to the existing methods, the proposed method has improved 12% in terms of attack detection time and 26% in terms of false positives/negatives. Manuscript profile -
Open Access Article
106 - Design of a Secondary Controller Based on Distributed Cooperative Control of Distributed Generators (DGs) with Multi-Agent Systems Approach Considering DoS Cyber Attacks
Abdollah Mirzabeigi Ali Kazemy Mehdi Ramezani Seyed Mohammad AzimiToday, in many control methods, neighboring system information is used for better control and synchronization between different units, and therefore, in the access and transmission of information through communication links, problems such as disruption, uncertainty, noi MoreToday, in many control methods, neighboring system information is used for better control and synchronization between different units, and therefore, in the access and transmission of information through communication links, problems such as disruption, uncertainty, noise, delay, and cyber-attacks occur. In this paper, the effect of the Denial of Service (DoS) cyber-attack on the microgrid in island mode is investigated and a cooperative distributed hierarchical controller is designed with the presence of this cyber-attack. Distributed Generations (DGs) have been analyzed with the help of multi-agent systems and the communication network between them using graph theory. The effects of the DoS cyber-attack on the model of DGs are mathematically formulated and in proving the stability and synchronization of frequency and voltage, the suitable Lyapunov function is presented and the stability analysis of DGs against these cyber-attacks is performed and the stability and synchronization conditions of DGs are proved. To confirm the proposed theoretical issues, a case study model is simulated despite the DoS attack on the communicative links in Matlab Simulink, and the results show the performance of the designed controller in different conditions. Manuscript profile -
Open Access Article
107 - Design and test a model of personality relationship with corona dissease anxiety mediated by perceived stress and self-efficacy in adolescents
Elahe Aslami Farzaneh Khani Mehrabadi Azam TadayonThis study aimed to investigate the relationship between personality traits and Corona disease anxiety by the mediating effect of perceived stress and self-efficacy among adolescents. Method: In this descriptive correlational study, the statistical population comprised MoreThis study aimed to investigate the relationship between personality traits and Corona disease anxiety by the mediating effect of perceived stress and self-efficacy among adolescents. Method: In this descriptive correlational study, the statistical population comprised high-school students in Abarkooh (Iran), of whom 318 were selected via random cluster sampling. The Corona Disease Anxiety Scale (Alipour et al. 2019), the five-factor NEO Personality Inventory (Costa & McCrae, 1992), The Perceived Stress Scale (Cohen et al. 1983), and The Self-Efficacy Scale (Sherer et al. 1982) were employed. The proposed model was evaluated by path analysis in AMOS and SPSS. Resalts: The results of direct hypotheses showed that agreeableness, conscientiousness and self-efficacy had a negative and inverse effect and perceived stress had a positive and direct effect on Corona disease anxiety. The results of the study of indirect hypotheses showed that conscientiousness had an indirect and inverse effect on corona disease anxiety mediated by stress and self-efficacy, and neuroticism, extraversion, and conscientiousness had an indirect effect on corona disease anxiety through perceived stress. Conclusion: Therefore, it is possible to reduce the level of corona disease anxiety in adolescents by strengthening self-efficacy as a coping resource and teaching stress management to adolescents and their effect on neuroticism, extraversion and conscientiousness, and use the obtained results in therapeutic interventions. Manuscript profile -
Open Access Article
108 - Effect of Trace Mineral on the Hoof Health
Fatemeh Kohansal Marzieh FaeziThe claw quality is a product of claw shape, characteristics of the horn and anatomy of the inner structure. Hoof health is largely determined by the production of good quality horn of adequate resistance. The functional integrity of hoof horn essentially depends on a p MoreThe claw quality is a product of claw shape, characteristics of the horn and anatomy of the inner structure. Hoof health is largely determined by the production of good quality horn of adequate resistance. The functional integrity of hoof horn essentially depends on a proper differentiation, i.e., keratinization of hoof epidermal cells. Keratinization of hoof epidermis is controlled and modulated by a variety of bioactive molecules and hormones. This process is dependent on an appropriate supply of nutrients including vitamins, minerals, and trace elements. Regulation and control of differentiation and nutrient flow to the epidermal cells play a central role in determining the quality and, consequently, the functional integrity of hoof horn. Decreasing nutrient supply to keratinizing epidermal cells leads to horn production of inferior quality and increased susceptibility to chemical, physical, or microbial damage from the environment. A growing body of evidence suggests that hormones, vitamins, minerals, and trace elements play critical roles in the normal development of claw horn and correct keratin formation. Increasing the bioavailability of trace minerals improves their utilization and thus contributes to an improved integrity of keratinized tissues. Manuscript profile -
Open Access Article
109 - The mediating role of academic self-efficacy in the relationship between identity styles and perceived social support with academic commitment
mitra mashallahi Mahboubeh FouladchangThe aim of this study was to investigate the mediating role of academic self-efficacy in the relationship between identity styles and perceived social support with academic commitment. The research method was a descriptive correlational study using path analysis. The st MoreThe aim of this study was to investigate the mediating role of academic self-efficacy in the relationship between identity styles and perceived social support with academic commitment. The research method was a descriptive correlational study using path analysis. The statistical population of this research included undergraduate students of Tabriz university during the academic year of 2021-2022. For this purpose, 300 students were selected using available sampling method. Data were collected using academic commitment scale (Human-Vogel and Rabe, 2015), berzonsky identity style inventory(Berzonsky,1992), perceived social support scale (Zimet et al.,1988) Academic self-efficacy Questionnaire (Owen and froman, 1988). The results showed that the research model fit well with the data collected. The results indicated that informative and normative identity styles can directly predict higher academic commitment and academic self-efficacy while Diffuse-avoidant style can directly and negatively predict academic commitment and academic self-efficacy Findings also showed that academic self-efficacy and perceived social support from family, friends and Significant others can directly and positively predict academic commitment. Besides, the research hypothesis regarding the mediating role of academic self-efficacy in the relationship between identity styles and perceived social support with academic commitment was confirmed. Overall, the findings suggest that identity styles and perceived social support play an important role in predicting academic commitment Manuscript profile -
Open Access Article
110 - An Individual-Oriented Shuffled Frog Leaping Algorithm for Solving Vehicle Routing Problem
Soheila Shafiezadeh Zahra BeheshtiThe Vehicle Routing Problem (VRP) is one of the most important problems in supply chain management because the optimal allocation of vehicles has a significant impact on reducing costs. VRP is in the class of NP-hard problems and exact algorithms cannot find the best so MoreThe Vehicle Routing Problem (VRP) is one of the most important problems in supply chain management because the optimal allocation of vehicles has a significant impact on reducing costs. VRP is in the class of NP-hard problems and exact algorithms cannot find the best solution in an acceptable time. Hence, meta-heuristic algorithms can be employed to solve it. Shuffled Frog Leaping Algorithm (SFLA) is one of the meta-heuristic algorithms, which is efficient, but in some cases, its population diversity rapidly reduces, and the algorithm falls in local optima. In this study, an Individual-Oriented Shuffled Frog Leaping Algorithm (IO-SFLA) is proposed to enhance the exploration and exploitation of SFLA by exchanging the global and local information. Several VRPs in different dimensions are applied to evaluate the performance of IO-SFLA. The efficiency of IO-SFLA is compared with several improved shuffled frog leaping algorithms, Simulated Annealing (SA) and Genetic Algorithm (GA). The results show that IO-SFLA provides significant results compared with the other competitor algorithms. IO-SFLA achieves an average of 1130.442 for the best path cost. The next rank belongs to SA with an average of 1228.725. Other compared algorithms are in the lower ranks with high differences in results. Manuscript profile -
Open Access Article
111 - The Comparison of Resilience and Perceived Social support in infertile women with High and Low Levels of Infertility Stigma
mahdieh shafieetabarThis study aimed to compare resilience and perceived social support in infertile women with high and low levels of infertility stigma. The design of the present study was a descriptive and causal-comparative design. The statistical population was infertile women who ref MoreThis study aimed to compare resilience and perceived social support in infertile women with high and low levels of infertility stigma. The design of the present study was a descriptive and causal-comparative design. The statistical population was infertile women who referred to Jihad Arak University's Royan Infertility Center in 1401. 98 infertile women were selected as the research sample by available and purposeful sampling method (49 infertile women with high and 49 infertile women with low levels of infertility stigma). Participants answered the Infertility Stigma Consciousness Questionnaire, Resilience Scale and Multidimensional Scale of Perceived Social Support. Multivariate analysis of variance was used to analyze the data. The present study showed that infertile women with high levels of infertility stigma had significantly lower scores than the comparing group in resilience and perceived social support (P<0.05). Findings of this study clarify the importance of paying attention to psycho-social factors in dealing with the stigma of infertility. Manuscript profile -
Open Access Article
112 - Distributed Primal-Dual Algorithm with Variable Parameters and Bidirectional Incremental Cooperation
Ghanbar AzarniaSpecial conditions of wireless sensor networks, such as energy limitation, make it essential to accelerate the convergence of algorithms in this field, especially in the distributed compressive sensing (DCS) scenarios, which have a complex reconstruction phase. This pap MoreSpecial conditions of wireless sensor networks, such as energy limitation, make it essential to accelerate the convergence of algorithms in this field, especially in the distributed compressive sensing (DCS) scenarios, which have a complex reconstruction phase. This paper presents a DCS reconstruction algorithm that provides a higher convergence rate. The proposed algorithm is a distributed primal-dual algorithm in a bidirectional incremental cooperation mode where the parameters change with time. The parameters are changed systematically in the convex optimization problems in which the constraint and cooperation functions are strongly convex. The proposed method is supported by simulations, which show the higher performance of the proposed algorithm in terms of convergence rate, even in stricter conditions such as the small number of measurements or the lower degree of sparsity. Manuscript profile -
Open Access Article
113 - The effect of self- awareness on the creation of life quality in the architecture of religious places (case study: DezfulJam’e Mosque)
Ahmad Sarrafzadeh Minou Ghareh Baglou Mohammad Ali KayNejadHuman has always been in interaction, one of its aspects is the communication with himself. In this relationship, on one hand, human is placed as a self- aware being and on the other hand, as the real self. In such a way that common sense is affected by his existential MoreHuman has always been in interaction, one of its aspects is the communication with himself. In this relationship, on one hand, human is placed as a self- aware being and on the other hand, as the real self. In such a way that common sense is affected by his existential nature and affects the quality of life. The goal of the research can be considered to evaluate the biological aspects affecting the internal relationships of self- knowledge between human and the architectural body. Biological quality is created at different levels and shapes the environment in interaction with humans. The method of this research is a combination of qualitative and quantitative factors. So that, in the qualitative review, the topic is addressed using descriptions, observations and library studies, and in its quantitative aspect, it benefits from numerical data and analysis using the scientific method of Codas. The findings of the research show the formation of an internal relationship that has affected the quality of life and architectural environment. so that in each of the senses affecting self- awareness, Different quality levels are created. In this regard, it can be concluded that the purposeful design of architecture in order to shape the quality of life is influenced by the common senses of faith and time with the greatest impact, the sense of unity, presence and place with an average impact, and the sense of safety and awareness with the least impact. So that it is formed in a direct relationship between independent components (spatial physical perception, collective behavior, psychological) and connected components (common senses) and is a platform for achieving a desirable life. Therefore, this issue can be considered as a result of the internal relationship between three aspects of self- awareness, common senses and architecture, which is formed according to the relationship between independent and dependent components in architecture. Manuscript profile -
Open Access Article
114 - The application of Normalized Cumulative Gamma Deviation Log (NCGDL) in sequence stratigraphic analysis and correlation, a case study from the Sarvak Formation, Abadan Plain, SW, Iran
A. Asaadi A. Imandoust J. Honarmand ایرج عبدالهی فرد O.R. SalmianIdentification of key sequence stratigraphic surfaces is an essential task in geological evaluation of hydrocarbon reservoirs. The Sarvak Formation with Late Albian-Early Turonian age constitute the important reservoir unit in the Abadan Plain region, SW Iran. This stud MoreIdentification of key sequence stratigraphic surfaces is an essential task in geological evaluation of hydrocarbon reservoirs. The Sarvak Formation with Late Albian-Early Turonian age constitute the important reservoir unit in the Abadan Plain region, SW Iran. This study investigates the application of Normalized Cumulative Gamma Deviation Log (NCGDC) to discriminate and correlate key sequence stratigraphic surfaces in six wells in a giant oil field in the Abadan Plain. To achieve this goal, identified key stratigraphic surfaces from core and thin sections were compared with interpretation of NCGDC method. From sequence stratigraphic point of view and based on the results from geological studies, the Sarvak Formation has been sub-divided into four third-order sequences which are described and interpreted. Two main disconformity surfaces, considered as sequence boundaries, are characterized by features of karstification, dissolution-collapse brecciation, and development of paleosol horizons. Generally, positive surfaces correspond to maximum flooding surfaces and negative surfaces occur at sequence boundary. Comparison of the results shows that, the identified sequence by NCGDC method can be effectively used for discrimination and correlation of sequences in different carbonate and siliciclastic reservoirs in the field scale. Manuscript profile -
Open Access Article
115 - Stabilizing and Synchronizing the Islanded Microgrid with the Presence of Sensor and Actuator Fault and Cyber-Attack with Secondary Controller Design
Abdollah Mirzabeigi Ali Kazemy Mehdi Ramezani Seyed Mohammad AzimiIn many microgrid control methods, the output information of sensors and actuators of neighbouring distributed generators (DGs) is used to stabilize and synchronize voltage and frequency. Many problems such as disturbances, uncertainty, unmodeled dynamics, cyber-attacks MoreIn many microgrid control methods, the output information of sensors and actuators of neighbouring distributed generators (DGs) is used to stabilize and synchronize voltage and frequency. Many problems such as disturbances, uncertainty, unmodeled dynamics, cyber-attacks, noise, time delay, and measurement errors cause invalid data problems and errors in the system. Better microgrid control depends on the quality of data measured or sent from the output of sensors and actuators. In this paper, according to the advantages of the Cooperative distributed hierarchical control, it is used for control and synchronization in the islanded microgrid with the presence of sensor and actuator error. To synchronize DGs with multi-agent systems and communication channels, it is modeled with graph theory. To stabilize and synchronize, sensor and actuator error in the DG model is mathematically formulated. In the proof of stability and synchronization, the appropriate Lyapunov candidate is presented and the conditions of stability and synchronization are proved. Finally, to show the effectiveness of the designed controller in solving communication channel problems and verifying the presented theory, a case study is simulated in the MATLAB/Simulink software environment with the presence of error and cyber-attack of sensors and actuators. Manuscript profile -
Open Access Article
116 - review of polymer-protein
Nadereh Golshan Ebrahimi -
Open Access Article
117 - Friendship Selection Based on Social Features in Social Internet of Things
Mohammad Mahdian S.Mojtaba MatinkhahThe Social Internet of Things (SIoT) network is the result of the union of the Social Network and the Internet of Things network; wherein, each object tries to use the services provided by its friends. In this network, to find the right friend in order to use the right MoreThe Social Internet of Things (SIoT) network is the result of the union of the Social Network and the Internet of Things network; wherein, each object tries to use the services provided by its friends. In this network, to find the right friend in order to use the right service is demanding. Great number of objects' friends, in classical algorithms, causes increasing the computational time and load of network navigation to find the right service with the help of friendly objects. In this article, in order to reduce the computational load and network navigation, it is proposed, firstly, to select the appropriate object friend from a heuristic approach; secondly, to use an adapted binary cuckoo optimization algorithm (AB-COA) which tries to select the appropriate friendly object to receive the service according to the maximum response capacity of each friendly object, and finally, adopting the Adamic-Adar local index (AA) with the interest degree centrality criterion so that it represents the characteristics of the common neighbors of the objects are involved in the friend selection. Finally, by executing the proposed algorithm on the Web-Stanford dataset, an average of 4.8 steps was obtained for reaching a service in the network, indicating the superiority of this algorithm over other algorithms. Manuscript profile -
Open Access Article
118 - Investigating the effect of perceived value on resistance to the adoption of blockchain technology in the tourism industry
yazdan shirmohamadi Mohadese kokabi Seyyed Mohammad Hadi Qazi TabatabaeiThis study aims to provide a conceptual model to understand the factors affecting the resistance to the adoption of blockchain technology in the tourism industry by combining and developing previous models. This research used survey method using questionnaire tool to co MoreThis study aims to provide a conceptual model to understand the factors affecting the resistance to the adoption of blockchain technology in the tourism industry by combining and developing previous models. This research used survey method using questionnaire tool to collect information and also used structural equation modeling with Partial Least Squares (SEM-PLS) approach for statistical analysis. The findings of this research first develop the theoretical and theoretical relationship between concepts such as perceived value and resistance and secondly examine and study this relationship in the context in which managers and activists of the tourism sector operate. In the first stage, the conceptual model of this research is based on the model presented by Walsh et al [1]. The discussion about the research findings shows that the benefits of substitution in the minds of managers and activists of the tourism sector are much stronger than the costs of substitution of blockchain technology. Also, the simplicity of the infrastructure is one of the key factors that has a high impact on understanding the benefits of replacement as well as the perceived value. Examining the role of perceived functional advantage and perceived image in the formation of alternative benefits is one of the innovations of this research in the research related to the application of blockchain technology in the tourism sector. So it can be concluded that in order to reduce resistance to blockchain technology, managers should emphasize more on the advantages of this technology. Manuscript profile -
Open Access Article
119 - The Effectiveness of Behavioral Parent Training on Reducing Externalizing Problems in 7 to 9 Years Old Children
Saeed GhanbariThe effectiveness of behavioral parent training on externalized problems (aggressive behavior and rule breaking) in 7 to 9 years old children was investigated in this study. Sixty parents whose children(aged 7 ta 9) had received the highest scores on the Child Behaviora MoreThe effectiveness of behavioral parent training on externalized problems (aggressive behavior and rule breaking) in 7 to 9 years old children was investigated in this study. Sixty parents whose children(aged 7 ta 9) had received the highest scores on the Child Behavioral Checklist (CBCL) and their problems were also confirmed by the Teacher Report Form (TRF) were selected.from a pool of 360 parents in two randomly selected schools in Tehran. Subjects were divided into control and experimental groups .the Experimental group received BPT for 4 weeks, twice a week sessions lasting tow hours. Results were analyzed using covariance and indicated that parents in the experimental group reported a significant decrease in externalized problems and aggressive behaviors as compared to the control group. In regard to rule breaking behavior, no significant difference was observed between the groups. The emerged findings can have clinical applications in prevention and treatment of child behavioral disorders. Manuscript profile -
Open Access Article
120 - Investigating the intention of travelers to visit green-oriented hotels - based on (Theory of planned behavior and value-belief-norm theory) Case study: Parsian Hotel - Chaharmahal and Bakhtiari province
SHAHRAM RAFIEI NAEINI abdolreza farajiradToday, the tourism industry has emerged as one of the fastest growing industries in the world. Despite its economic contribution, the growth and activities of the tourism industry have side effects. The activities related to the tourism and hospitality industry have cau MoreToday, the tourism industry has emerged as one of the fastest growing industries in the world. Despite its economic contribution, the growth and activities of the tourism industry have side effects. The activities related to the tourism and hospitality industry have caused pollution, produced a lot of waste and reduced natural resources. The main purpose of the preliminary investigation of this study is to integrate the developed theory of planned behavior and belief-norm value as basic concepts in understanding the intention to visit Parsian Green Tourist Hotel in Chaharmahal and Bakhtiari province. The method and investigation of this study was collected online in the form of a questionnaire of 160 items. Partial Least Square Structural Equation Modeling (PLS-SEM) technique was used to evaluate the study framework and the hypothetical relationship. The originality and primary value in this study shows that the theory of planned behavior and the theory of value-belief-norm integrate well the understanding of the tourist's intention to visit Green Parsian Hotel in Chaharmahal and Bakhtiari province. Importantly, the theory of planned behavior and value-belief-norm theory have been practical and useful in predicting the tourist's intention to visit a green hotel. In the study of practical concepts, it provides valuable results for green hotel operators to create effective strategies to attract tourists to visit green hotels. Also, the findings and results at the level of this study confirm that tourists' intention to stay in a green hotel is directly influenced by their perceived mental norms and behavioral control. In addition, this study confirms the insignificant relationship between green trust, personal norms and tourists' intention to stay. On the other hand, perceived ethics, responsibility, willingness to pay more, and perceived consumer effectiveness were significant in explaining customer subjective norms, personal norms, and perceived behavioral control. Manuscript profile -
Open Access Article
121 - The Study of Activity-based Costing to Determine the Cost of Services In the Education
Younos Vakil Alroaia hossein eslami mofidabadeiEducation, which has a diverse administrative and organizational structure, needs to be able to create the necessary coordination between the resources and expenditures of current and future activities. Therefore, the purpose of this study was to investigate the activit MoreEducation, which has a diverse administrative and organizational structure, needs to be able to create the necessary coordination between the resources and expenditures of current and future activities. Therefore, the purpose of this study was to investigate the activity-based costing system to determine the cost of services in education in Semnan province. The research method was descriptive-applied and its statistical population includes the resources and expenditures of all education departments, financial managers and experts and budget officials in the education units of Semnan province. In order to collect the initial data, the documentary or library and field method has been used. Then, with the Activity Based Costing approach, the cost of current and future activities is estimated. The results are estimated during 2017 to 2020. Thus, in 2020, the highest cost price of a student among the selected cities belonged to Amirabadi city with a figure of eighty-two million five hundred thousand Rials (81,500,000) and the lowest cost price of a student unit belonged to Bastam city, which amounted to It is four million and six hundred and thirty thousand Rials (4,630,000). The results indicate that the average cost price in 1399 was twenty-six million and eight hundred and five thousand Rials (26.805.000). Also, the results showed that the cost of education services at different levels and according to the city are significantly different from each other that this difference mainly depends on the number of students, educational equipment, combination of educational levels and distance from the center has it. Manuscript profile -
Open Access Article
122 - Analysis of the Effects of Different Cyber Attacks on the Secondary Controller in Island Microgrids
Abdollah Mirzabeigi ali kalantarniaWith the advancement of science, in many control methods, the neighbor system is used to better control and synchronize between different information of microgrids. There are problems in accessing and transmitting information through communication links. In this article MoreWith the advancement of science, in many control methods, the neighbor system is used to better control and synchronize between different information of microgrids. There are problems in accessing and transmitting information through communication links. In this article, vulnerability and acceptance of secondary control methods are distributed. Also, denial-of-service (DoS) cyber-attacks, sensors and actuators, and hijacking on the island microgrid have been investigated. In addition to stability, synchronization is also analyzed in this article. Multi-agent systems have been used for synchronization. Cyber-attacks are mathematically formulated in the controller. A suitable controller is designed to eliminate the attacks. In the stability and synchronization of frequency and voltage, the Lyapunov function is presented and simultaneous analysis of stability and synchronization has been done with practical proofs. The resilience factor has been calculated for different attacks. It is shown that the system is resilient against cyber-attacks. A case study has been simulated in MATLAB/Simulink to approve the theoretical issues. Manuscript profile -
Open Access Article
123 - An online scoring system using distributed ledger technology based on smart contracts
سیده الهام موسوی خوThe online rating system on most websites provides users with a rating for products and services. The lack of trust in the correctness and non-manipulation of data has caused users' satisfaction to not be provided as it should be. Considering that the existing online sc MoreThe online rating system on most websites provides users with a rating for products and services. The lack of trust in the correctness and non-manipulation of data has caused users' satisfaction to not be provided as it should be. Considering that the existing online scoring system deals with a central server, all score data is stored in a central server; Therefore, all score data can be deleted, changed and manipulated by the system administrator to change the score results in favor of the service or product provider. In this research, the online scoring system using distributed ledger technologies has been introduced as a proposed system to solve all the weaknesses in the current systems. Distributed ledger technologies are a type of technology that works in a decentralized manner and there is no focus from any entity on this technology. There are different types of distributed ledger technologies. Among distributed ledger technologies, block chain technology is chosen for the proposed scoring system due to its smart contract support. In the proposed online scoring system, the performance criteria of a node are unknown and therefore cannot be used directly to optimize the segmentation results. To solve the performance problem caused by the difference of nodes in the blockchain without knowing the different characteristics of the nodes, we propose a new segmentation method called NoRS. This proposed method consists of four phases: NoRS schematic, scoring mechanism, segmentation strategy, transaction confirmation, creation and release of new block. Therefore, by reviewing the transaction process reports, we evaluate the nodes and assign them to different committees based on the score corresponding to each node; With this process, the ratio of different nodes within the committee is balanced to improve the blockchain transaction efficiency. The advantages of the proposed scoring system compared to the existing systems are that the proposed system works in a decentralized manner and the information cannot be manipulated. Also, the privacy of the scorers is preserved and the transparency of the data is guaranteed. Manuscript profile -
Open Access Article
124 - From Introduction to Consumer Behavio: Investigating the Moderator Role od OLE Aesthic Risk and Percived Economic
omid behboodi Zahra Mohamadzadeh Tayebeh RamezaniThe purpose of this study is to investigate the role of intention to use electronic banking services on the actual behavior of using these services and the moderating role of economic risk and perceived aesthetics on the relationship between intention and behavior in th MoreThe purpose of this study is to investigate the role of intention to use electronic banking services on the actual behavior of using these services and the moderating role of economic risk and perceived aesthetics on the relationship between intention and behavior in the future bank.The descriptive research method is an applied goal,and in terms of implementation method,a descriptive survey and a questionnaire were used to collect data.In the present study,the statistical population includes customers and depositors of Ayandeh Bank who use the electronic services on the Internet of this bank. Data analysis of250 questionnaires collected from Ayandeh Bank customers in Mashhad was performed using structural equation modeling technique and PLS statistical software. The results showed that the structural model of the present study has sufficient predictive power.It was also found that the intention to use e-services affected their behavior of such services.The results showed that the perceived economic risk negatively affects consumers' intention to use the e-services of Ayandeh bank on their usage behavior.It was finally determined that perceived aesthetics risk does not affect the relationship between our sample's intention to use e-banking services' behavior.In general,the intention to use motivational factors affects the behavior of actual use of technology, and this study depicts e-banking and shows the number of efforts people are willing to make Manuscript profile -
Open Access Article
125 - Comparison of Resilience, Mindfulness and Perceived Social Support in Mothers of Children with ADHD and Learning Disabilities, with Mothers of Normal Children in Shiraz
reza chalmeh Khadijeh arjmandiThe aim of this study was to compare resilience, mindfulness and perceived social support in mothers of children with ADHD, learning disabilities and normalcy in Shiraz. Methodology: The statistical population of the present study was the mothers of children with Attent MoreThe aim of this study was to compare resilience, mindfulness and perceived social support in mothers of children with ADHD, learning disabilities and normalcy in Shiraz. Methodology: The statistical population of the present study was the mothers of children with Attention Deficit / Hyperactivity Disorder, Learning Disabilities and Normal in Shiraz. Attention Deficit / Hyperactivity Disorder, 52 mothers with children with learning disabilities and 54 mothers with normal children were selected and the Resilience Questionnaire (Connor & Davidson, 2003), Mindfulness Questionnaire (Walch et al., 2006) and Social Support were selected. Perceived (Zimet et al., 1988). Data were analyzed using Levin test method (to check the homogeneity of variances), and multivariate analysis of variance (to check the differences between variables in the study group) and SPSS-24 software. Results: The results of analysis of variance showed that there is a significant difference between resilience, mindfulness and perceived social support between mothers of children with ADHD and learning disabilities with mothers of normal children; In a way, mothers of normal children had more resilience, mindfulness and social support. Conclusion: The final results showed that in the areas of resilience and mindfulness, mothers of hyperactive children / attention deficit and learning disabilities need resilience and mindfulness-based education and special rehabilitation programs to increase Perceived social support is needed. Manuscript profile -
Open Access Article
126 - Presenting a model of psychological helplessness in infertile women based on cognitive flexibility and psychological hardiness with the mediating role of perceived social support
Fatemeh Hemmati فریده انصافداران Seyed Mehdi HosseiniThe purpose of this study was to test the model of cognitive flexibility and psychological hardiness on psychological helplessness with mediation of perceived social support. The study was a correlation through structural equation modeling. The statistical population in MoreThe purpose of this study was to test the model of cognitive flexibility and psychological hardiness on psychological helplessness with mediation of perceived social support. The study was a correlation through structural equation modeling. The statistical population included all infertile women in Shiraz, which was selected from 250 people with targeted sampling method as sample. The research data were collected by Lovibond and L0vibond psychological helplessness questionnaire(1995), Dennis and Vonder Wal's cognitive flexibility questionnaire(2010), Ahwaz psychological hardiness questionnaire(1377) and Zimet and colleagues perceived social support questionnaire. Data analysis was performed using SPSS and AMOS software. According to the findings, the coefficient of direct pathway of cognitive flexibility to psychological helplessness, cognitive flexibility to perceived social support and psychological hardiness for perceived social support was significant. The coefficient of two direct pathways of psychological hardiness to psychological helplessness and perceived social support to psychological helplessness and also the indirect pathway coefficient of cognitive flexibility to psychological helplessness and psychological hardiness to psychological helplessness through perceived social support is not significant. In order to reduce the psychological helplessness of infertile women, measures should be taken to improve and increase psychological hardiness, cognitive flexibility and perceived social support. Manuscript profile -
Open Access Article
127 - Design of Distributed Consensus Controller for Leader-Follower Singular Multi-Agent Systems in the Presence of Sensor Fault
Saeid Poormirzaee Hamidreza Ahmadzadeh masoud ShafieeIn this paper, the problem of sensor fault estimation and designing of a distributed fault-tolerant controller is investigated to guarantee the leader-follower consensus for homogeneous singular multi-agent systems for the first time. First, a novel augmented model for MoreIn this paper, the problem of sensor fault estimation and designing of a distributed fault-tolerant controller is investigated to guarantee the leader-follower consensus for homogeneous singular multi-agent systems for the first time. First, a novel augmented model for the system is proposed. It is shown that the proposed model is regular and impulse-free unlike some similar research works. Based on this model, the state and sensor fault of the system are simultaneously estimated by designing a distributed singular observer. The proposed observer also has the ability to estimate time-varying sensor fault. Then, a distributed controller is designed to guarantee the leader-follower consensus using estimation of state and sensor fault. The sufficeient conditions to ensure the stability of the observer dynamic and consensus dynamic are drived in terms of linear matrix inequalities (LMIs). The gains of observer and controller are computed by solving these conditions with MATLAB software. Finally, the validation and efficiency of the proposed control system for the leader-follower consensus of singular multi-agent systems exposed to sensor faults is illustrated by computer simulations. The simulation results show that the propsed control strategy deeling to the sensor falut in the singular multi-agent systems is effective. Manuscript profile -
Open Access Article
128 - Relationship Between Perceived Stress And Craving Usage with Predicting Relapse in Stimulants Users Mediated By Self-Control
roya jalili Javad KHalatbari Hassan Ahadai shohreh ghorban shiroudiThe purpose of the present study was to investigate the relationship between perceived stress and craving for consumption with predicting people's return to stimulants with the mediation of self-control. This research was method descriptive-correlative. The statistical MoreThe purpose of the present study was to investigate the relationship between perceived stress and craving for consumption with predicting people's return to stimulants with the mediation of self-control. This research was method descriptive-correlative. The statistical population of this research included all people who used stimulants, hospitalized in care centers in Tehran in 1400 (2019). For sample selection, 250 persons were randomly selected based on the structural modeling formula. In order to collect information, Cohen's Perceived Stress Scale, Franken's Substance Craving, Wright's Substance Return Prediction and Tanji's Self-Control Scales were used. The analysis of the research data, using the path analysis method, showed that there is a positive and significant relationship (P<0.01) between perceived stress and predicting return to stimulants with the mediation of self-control and between drug craving and predicting return to stimulants with The mediation of self-control. Also, there were a negative and significant relationship (P<0.01) between self-control and predicting return to stimulants. Thus, it can be concluded that with increase in perceived stress and the urge to use, the return to use of stimulants increases and the amount of self-control decreases, and with decrease of self-control, the return to use of stimulants increases. Manuscript profile -
Open Access Article
129 - A comparative study of the concept of home among children of two cities (Shiraz and Noujin)
Fahimeh Abbasi Tahereh Nasr Keivan Mohamadpur<p>Abstract The concept of “home” transcends its physical existence, manifesting as an intellectual image. In essence, a house is a place to live and reach peace and comfort. The term “house” encompasses two distinct aspects of meaning and concep More<p>Abstract The concept of “home” transcends its physical existence, manifesting as an intellectual image. In essence, a house is a place to live and reach peace and comfort. The term “house” encompasses two distinct aspects of meaning and concept, which are different from each other. The aspect of the house meaning is an objective reality of a place where a person resides, but the concept of the house is a mental perception. Understanding the concept of home necessitates a thorough analysis of each individual's mindset regarding their living space. The purpose of this research is a comparative assessment of the home concept among 9-10-year-old children residing in Shiraz and Nojin cities. The research methodology involves content analysis utilizing argumentative analogies along with information gathering through library and documentary studies, Persian and Latin articles, and field research. By analyzing and examining thirty samples of children's drawings from these cities, it is possible to identify the similarities and differences in their mental images of the home concept. Result of this examination and analysis is anticipated several conceptual codes can be obtained. From the summation of these conceptual codes, the home concept among the children of these cities can be found, encompassing themes such as peace, comfort, comfort, security, and prosperity.</p> Manuscript profile -
Open Access Article
130 - Investigating the Relationship Between Rumination and Perceived Stress with Life Satisfaction in Married Women in Shiraz
Fatemeh Dinakani reza chalmeh fatemeh abdolahi<p>The aim of the present research was to explain the relationship between rumination and perceived stress with life satisfaction in married women in Shiraz. The research method was a descriptive and survey-based. The statistical population included all the women of Shi More<p>The aim of the present research was to explain the relationship between rumination and perceived stress with life satisfaction in married women in Shiraz. The research method was a descriptive and survey-based. The statistical population included all the women of Shiraz city, and 210 individuals were selected as the statistical sample size using a convenience sampling. Data were collected using the Hoeksma and Maro's Rumination Questionnaire (1991), Cohen et al.'s Perceived Stress Questionnaire (1983) and Diener Ammons Larsen and Griffin's Life Satisfaction Questionnaire (1985). The findings revealed that among the dimensions of rumination, the two components of preoccupation and depression had a negative and significant relationship with life satisfaction. However, there was no significant relationship between reflection and life satisfaction. In conclusion, the overall score of rumination was negatively and significantly related to life satisfaction, and ultimately, perceived stress is not a significant predictor of life satisfaction.</p> Manuscript profile -
Open Access Article
131 - A review of factors influencing the rheological behavior of highly filled composite
Ali RiazatiThe highly filled composite consists of two polymer matrix components and different fillers with a weight fraction of more than 30% and are widely used in defense systems and aerospace engines. Each of the metal powders can affect the rheological behavior of highly fill MoreThe highly filled composite consists of two polymer matrix components and different fillers with a weight fraction of more than 30% and are widely used in defense systems and aerospace engines. Each of the metal powders can affect the rheological behavior of highly filled composites according to their properties, type of granulation, type of particle size, and morphology. The investigation of three types of metal powders, aluminum, magnesium and boron, which are the most used in highly filled composites, has been done in this study. The results of the investigation of the rheological behavior showed that with the increase in the size of solid particles, the content of metal powders, as well as the cross-linking factor, the viscosity and yield stress of the slurry of composite materials increases and causes the flow properties of the slurry to deteriorate and its service life to be shortened. become wet The increase in viscosity is due to smaller solid particles and the increase in molecular weight and the formation of transverse connections in the structure of the prepolymer. The viscosity of the slurry of composite materials decreases with the increase of the shearing speed and shows non-Newtonian pseudo-plastic behavior, and its value depends on the speed and time of the applied shearing force. Combining boron metal powder with magnesium or aluminum powder can greatly improve the rheological behavior of the highly filled composite. Manuscript profile -
Open Access Article
132 - A Review of Thermal Actuation Methods for Thermally-Activated Twisted and Coiled Polymer Actuators
Mohammadamir Bakhshi Ali Moazemi Goudarzi Fattaneh MorshedsoloukRecently, a new type of artificial muscle called thermally activated twisted and coiled polymer actuators (TCPAs) has garnered significant attention. These actuators are primarily made from fishing lines or sewing thread, and when actuated by heat, they can contract alo MoreRecently, a new type of artificial muscle called thermally activated twisted and coiled polymer actuators (TCPAs) has garnered significant attention. These actuators are primarily made from fishing lines or sewing thread, and when actuated by heat, they can contract along their length to produce linear displacement. The low production cost, silent operation, high power-to-weight ratio, and the ability to generate significant displacement in response to thermal stimuli are among the advantages that have made these actuators more appealing compared to other conventional actuators. They are thus emerging as a suitable option for various applications, such as robotics, smart textiles, energy harvesting systems, and more. These actuators (TCPAs) operate by leveraging the expansion and contraction properties of polymer fibers, which are initially twisted by an electric motor and then coiled into a spring-like structure. This construction method enhances the strength and efficiency of the TCPAs. Additionally, these actuators can maintain their performance in diverse environments, including underwater and high-temperature settings. This review explores the fabrication methods, underlying principles, and thermal actuating techniques of these actuators. It also discusses their innovative and emerging applications. Furthermore, the study addresses the challenges in exploiting this technology and proposes possible solutions to optimize their performance. Manuscript profile
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