List of Articles دما

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  1 - Investigation and Correlation Test of Temperature Time Series and Dusty Days in Hamedan Province
  Amir Gandomkar          
  Dust has always been considered as one of the most important environmental hazards and has undesirable environmental impacts. This study aims to investigate the trend of dusty days and temperature time series in Hamedan province and the effect of temperature series on t More

  Dust has always been considered as one of the most important environmental hazards and has undesirable environmental impacts. This study aims to investigate the trend of dusty days and temperature time series in Hamedan province and the effect of temperature series on the number of dusty days. In this regard, the number of dusty days as well as average temperature, minimum temperature and maximum temperature of the stations in Hamedan, Nozheh Hamedan and Malayer, during the statistical period of 1992-2012, were used. At first, the Normality test of the data was performed by Anderson-Darling test and then the normal and abnormal months were separated. Then for non-normal months, Mann Kendall test and for normal months, t test and Least Squares method were used. Finally, the Correlation test was performed, using the Pearson Correlation and Linear Regression tests. The results showed that the temperature time series in the months with specific trends have been increasing. Also, the number of dusty days has decreased in the cold months of the year and increased in the warm ones. According to the Prediction model, the occurrence of this phenomenon will have an increasing trend in the future. Manuscript profile
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  2 - Geo-thermo-barometry in Jebale Barez plutonic complex by using amphibole and feldspars chemistry
  جمال  رسولي aboozar ghorbani Vahid Ahadnejad
  Jebale-Barez plutonic complex is composed of granitoid intrusive bodies and is located in the East and southeastern of Jiroft province of Kerman. The plutonic complex is composed of granodiorite, quartzdiorite, granite and alkaligranite. Plutonic rocks are mainly com More

  Jebale-Barez plutonic complex is composed of granitoid intrusive bodies and is located in the East and southeastern of Jiroft province of Kerman. The plutonic complex is composed of granodiorite, quartzdiorite, granite and alkaligranite. Plutonic rocks are mainly composed of plagioclase, alkali-feldspar, biotite, amphibole and quartz. Based on microprobe analysis, plagioclases vary from andesine to labradorite and alkali feldspars occur as orthoclase. All amphiboles are magmatic and placed in three groups: calcic amphiboles, iron-rich amphiboles, amphiboles consist of Fe, Mg, Mn. The study of oxidation and reduction state of their source magma by amphibole chemistry, in dicated high oxygen fugacity. Therefore, granitoids of Jebale-Barez plutonic complex are I-type or related to magnetite series and the estimated oxygen fugacity imply oxidation magma and its formation in convergent plate boundary. On the basis of geo-thermo-barometric calculations, using Hamarstrom - Zen, Schmidt, Johnson - Rutherford, Smith - Anderson and Uchida methods, amphiboles have crystallized about 1.54 to 7.87 kbar at the depth about 18 to 23 km. As emplacement or crystallization temperature of Jebale-Barez plutonic complex based on the two feldspar thermometer using Anderson method has been ranges between 550 to 750 ºC and using Putirka method has been achieved between 710 to 830 ºC and based on Ti-in- amphibole thermometer has been ranges between 670 to 735 ºC. In addition, hornblende -plagioclase thermometer shows 653 to 732 °C for equilibrium of these two minerals Manuscript profile
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  3 - Determining the source of mineralizing fluid in Gol-e-Zard Zn-Pb deposit, Aligudarz using geochemical and fluid inclusion studies
  Ali Reza Zarasvandi Mona Sameti Zahra Fereydouni Mohsen Rezaei Hashem Bagheri
  The Gol-e-Zard Zn-Pb deposit is located in northeastern of the Aligudarz region (Lorestan province). This deposit is exposed in phyllite and meta-sandstones of upper Triassic-Jurassic of the Sanandaj-Sirjan Zone. The mineralization includes sphalerite, galena and chalco More

  The Gol-e-Zard Zn-Pb deposit is located in northeastern of the Aligudarz region (Lorestan province). This deposit is exposed in phyllite and meta-sandstones of upper Triassic-Jurassic of the Sanandaj-Sirjan Zone. The mineralization includes sphalerite, galena and chalcopyrite, which are mainly along quartz veins. Two mineralized horizons are phyllite with high mineralization and meta-sandstone with low mineralization. The mineralogical studies show that galena, sphalerite and chalcopyrite are metallic ores and quartz is also the most abundant gang mineral in the studied deposit. The evidence indicate that the mineralization of the Gol-e-Zard deposit is syngeneic and epigenetic. The most significant structural pattern is the stratabound mineralization in the region. The aim of this study is to determine the type and characteristics the mineralizing fluid in the discriminating of mineralized horizons, besides the determining of source of the fluid in the Gol-e-Zard deposit. LREE enrichments (La/Lu average 4.8) and positive Eu anomalies (average 1.2) indicate the anoxic condition and hydrothermal fluids. Fluid inclusion data shows homogenization temperatures of 139-199.5°C, salinity 5.21-30.38 wt%equ.NaCl and density 0.9-1.1 gr/cm3 in this deposit. Investigation of evolution path of the fluids shows isothermal mixing of fluids during mineralization that comprises the mixing of magmatic water with sea water and also meteoric water. Thus, the mineralization can be summarized as: expulsion of the hydrothermal fluids from the depth, entering into sea water and reducing the temperature of hydrothermal fluids due to mixing with sea water, ascending to the sea level, moving through sediments and circulating in void spaces of and then the leaching of metals from sediments and deposited along the void space and quartz veins. Manuscript profile
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  4 - Study of mineral chemistry, geothermobarometry and tectonic setting of gabbroic rocks from north-west Hamedan, Iran
  عادل ساکی Hooshang Pourkaseb Alireza Zarasvandi Milad Jahani Maryam Dorani
  The study area is geologically located in the northern area of the Sanandaj-Sirjan metamorphic zone. Based on petrographic study, the main minerals consists of plagioclase, pyroxene, amphibole and biotite and the accessory minerals are chlorite, muscovite, ilmenite and More

  The study area is geologically located in the northern area of the Sanandaj-Sirjan metamorphic zone. Based on petrographic study, the main minerals consists of plagioclase, pyroxene, amphibole and biotite and the accessory minerals are chlorite, muscovite, ilmenite and zircon. The obtained results from the mineral chemistry in this study indicate that the amphiboles are calcic amphiboles, and in terms of chemical composition they can be called pargasit, tschermakite and magnesiohomblende. Plagioclases are also andesian. Due to the low Na2O content, it can be concluded, that tectonically these amphiboles are of S-Amph type and are related to the subduction zones. Based on the high levels of Al2O3, the origin of amphiboles is mantle-type. Therefore, due to the ratio of Fetot (Fetot + Mg+2) to AlIv, which is less than 0.6, the oxygen fugacity was high. On the other hand, the water levels vary from 2 to 2.3 for hornblende crystallization. Different methods were used to perform thermobarometry, the best of which showed that the formation temperature of gabbroic mass has been in the range of 700°C (in average) and a pressure of 4.45- 7.52 Kb. According to the estimated pressures, the magma was originated at a depth of 25-30 Km, which is near the Moho discontinuity. Manuscript profile
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  5 - A Development Bank for Small and Medium Enterprises in Iran (SME bank of IRAN)
  Mohammad reza Edraki
  Financial supports just include a part of SMEs essential needs which will be performed through Banking institutions, Development Financial Institutions (DFIs), Leasing and Factoring Companies, Venture Capital Companies (VCs) to support and assist these Enterprises. But More

  Financial supports just include a part of SMEs essential needs which will be performed through Banking institutions, Development Financial Institutions (DFIs), Leasing and Factoring Companies, Venture Capital Companies (VCs) to support and assist these Enterprises. But development and formation new technical institutions in financial and advisory services lines from SMEs still seems to be necessary. SME Bank of Iran is one of these new and necessary institutes which can be effective as a Development Financial Institution to initiate SMEs businesses, and responding to their special necessity. This Bank as a financial institute and through related financial and advisory proceses can help for financial supports and necessary supplement helps of SMEs. Advisory services in SME Bank of Iran, absolutely, must be presented in an integrated form for financial supports and venture creation. Manuscript profile
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  6 - Performance Evaluation of TMDFET-based SRAM Memory Cell Compared to Si-MOSFET Technology
  فرزانه ایزدی نسب Morteza Gholipour
  Transition metal dichalcogenides FETs (TMDFETs) are among the emerging devices that have been considered by researchers in recent years. In this paper, the effect of parameter variations, temperature and power supply on the performance of TMDFET transistors has been inv More

  Transition metal dichalcogenides FETs (TMDFETs) are among the emerging devices that have been considered by researchers in recent years. In this paper, the effect of parameter variations, temperature and power supply on the performance of TMDFET transistors has been investigated in comparison with Si-MOSFET technology. The results indicate that TMDFET is less sensitive to these variations compared to Si-MOSFET devices. By selecting the appropriate transistors size ratios, the performance of the TMDFET-based conventional 6-transistor static random access memory cell is evaluated in comparison with the Si-MOSFET in 16nm technology. Simulations are performed at room temperature, 0.7 V supply voltage and the same conditions for both TMDFET and Si-MOSFET devices. The results of the simulations show that TMDFET-based SRAM cell has 29.44% more WTP, corresponding to more writing ability, 49.49% more WTI×WTV, corresponding to higher writing noise margin, and 29.48% lower read delay. In other words, a TMDFET-based SRAM cell performs better than Si-MOS-SRAM in terms of write ability, static read margin, and read delay. Manuscript profile
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  7 - Evaluation of trend of rainfall and temperature changes and their effects on meteorological drought in Kermanshah province
  Maryam Teymouri Yeganeh Liela Teymouri Yeganeh
  Climate change is one of the natural features of the atmospheric cycle, which results in anomalies or fluctuations in the process of meteorological parameters such as rainfall and temperature. Also, drought is one of the weather and climate disasters, including catastro More

  Climate change is one of the natural features of the atmospheric cycle, which results in anomalies or fluctuations in the process of meteorological parameters such as rainfall and temperature. Also, drought is one of the weather and climate disasters, including catastrophic events. It alternates with floods and causes significant damage each year. Lack of rainfall has different effects on groundwater, soil moisture and river flow. For this reason, the study of changes in precipitation and temperature has always been the focus of researchers in various sciences, including natural resources and the environment. In this study, using the data of Kermanshah Meteorological Organization related to 30 years of rainfall, average minimum temperature and average maximum temperature in three stations of Kermanshah, Islamabad West and Sarpol-e Zahab to assess the severity of drought each year by DIC software Using standard precipitation index (SPI) and examining the trend of temperature changes using two non-parametric Mann-Kendall tests, Sensitimator and also linear regression. In order to study the drought trend during the 30-year period, statistical software was used and the results showed that during the 30-year period, all three stations are in near normal condition. Also, the results of temperature changes using the mentioned tests indicate the increasing trend of temperature and this trend is significant at the level of 99% using two non-parametric Mann-Kendall tests. Manuscript profile