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  1 - Evaluation of SIP signaling implementation using QoS parameters
  mojtaba jahanbakhsh azharivs azharivs maryam homayooni Ahmad akbari
  Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 More

  Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 !mso]> st1:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal" mso-tstyle-rowband-size:0 mso-tstyle-colband-size:0 mso-style-noshow:yes mso-style-priority:99 mso-style-qformat:yes mso-style-parent:"" mso-padding-alt:0cm 5.4pt 0cm 5.4pt mso-para-margin:0cm mso-para-margin-bottom:.0001pt mso-pagination:widow-orphan font-size:11.0pt font-family:"Calibri","sans-serif" mso-ascii-font-family:Calibri mso-ascii-theme-font:minor-latin mso-fareast-font-family:"Times New Roman" mso-fareast-theme-font:minor-fareast mso-hansi-font-family:Calibri mso-hansi-theme-font:minor-latin mso-bidi-font-family:Arial mso-bidi-theme-font:minor-bidi} Abstract The variety of services on IP networks and the need for network technology convergence have resulted in many access networks to adopt the IP technology. The Session Initiation Protocol (SIP) is an end to end application level protocol for establishing, terminating and modifying sessions and has experienced widespread use in IP networks due to its distinguished features such as being text based, independence from the underlying network, and more importantly supporting various types of mobility. In fact these features have lead SIP to be used as the core signaling protocol in the IP Multimedia Subsystem, which is the control plane proposed for next generation networks by the 3GPP community. Nevertheless, the performance of SIP servers when used by the millions of users of the next generation networks is not well established. In this paper we evaluate the performance of SIP servers using a test bed developed at the Iran University of Science & Technology. We consider eight different configurations for SIP server and also study the effect of using TCP and UDP as the transport protocol for SIP packets. We measure several parameters including call setup delay, call failure rate and SIP server throughput. Our results suggest that using SIP in large networks require using special techniques for balancing the load of SIP servers as well as mitigating temporary overloads.  Manuscript profile
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  2 - A Review of the Semantic and Physical Structure of Sacred Places Inviolable Zone; Based on Works of Travel Literatures written from the fifth to the fourteen centuries A.H
  Mohamad Saeed izadi Nasim Asgari Shahriar Nasekhian
  In Islamic teachings, especially the Shia school of thought, the sanctity of every element is dependent on the divine essence; the closer the element’s attachment, the higher its sanctity. For this reason, the places of worship and sites of pilgrimage cities have for lo More

  In Islamic teachings, especially the Shia school of thought, the sanctity of every element is dependent on the divine essence; the closer the element’s attachment, the higher its sanctity. For this reason, the places of worship and sites of pilgrimage cities have for long been revered, attracting those seeking spirituality. It’s unfortunate that in recent times, overlooking the sanctity of sacred places, also called Inviolable Zones (Ha’rim), has led to the disturbance of integrity in the surrounding area and the distortion of the authenticity of these monuments, often with the excuse of urban development and on occasion for facilitating the pilgrimage itself. Undoubtedly, considering and reviewing related documents such as works of travel literature even if in an overall format, can provide a useful framework for the reconsideration of such destructive activities. This research is an effort to examine the semantic and physical structure of the inviolable zone of sacred places by relying on interpretive-historical methods with the inductive approach. It will discuss here, the contexts, literature and illustrated images of 48 pieces of travel literature dating back to fifth to the fourteenth centuries AH. It concludes that these sacred places have been perceived as “symbols and indications of a pilgrimage city” and were “individual and unique in their surrounding area” with due respect for their “integrated cohesion,” while preserving their interaction with the surrounding residential, commercial, educational, and other functions. Such structures were given the “spatial hierarchy” of the unique urban systems in which they were located. The conclusion explains the respect and sanctity regarding both physical and metaphysical aspects while conserving all tangible and intangible elements of the typology of religious heritage throughout the aforementioned era. The physical structure of the inviolable zone of these sacred places can be divided into three different scales: the core zone, the buffer zone and the sacred precinct which indicates that the holy shrines were not only limited to their surroundings but were deemed to emanate sanctity to the entire city. Finally, it should be considered that traditions, rituals and religious values play an active role in creating the semantic structure of the surrounding inviolable zone. Manuscript profile
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  3 - Modeling a Proposed Nanoscale SOI-Junctionless for Improvement of Steady-State and Frequency Characteristics
  Mohammad Kazem Anvarifard
  In this paper in order to improve the electrical performance of nanoscale SOI-junctionless, a targeted modification has been performed. The proposed structure has been aimed to reduce the OFF current and self-heating effect. To reduce the self-heating effect, the buried More

  In this paper in order to improve the electrical performance of nanoscale SOI-junctionless, a targeted modification has been performed. The proposed structure has been aimed to reduce the OFF current and self-heating effect. To reduce the self-heating effect, the buried oxide thickness has been reduced into the half and a part of it has been replaced by a buffer layer. Increase in the thermal conduction and making an extra depletion layer in the buffer layer/channel region interface are led to improvement of the electrical performance in the terms of DC and AC. In the proposed method, which is based on the energy band modification, the parameters such as IOFF, ION/IOFF, subthreshold swing, lattice temperature, voltage gain, transconductance, parasitic capacitances, power gains, cut-off frequency, maximum oscillation frequency and minimum noise figure have been improved. Also, a designing consideration for the role of buffer layer on the proposed device has been performed. Comparing structures under the study simulated by the SILVACO showed the electrical performance superiority for the proposed device. Manuscript profile
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  4 - An Approximate Binary Tree-Based Solution to Speed Up the Search for the Nearest Neighbor in Big Data
  Hosein Kalateh M. D.
  Due to the increasing speed of information production and the need to convert information into knowledge, old machine learning methods are no longer responsive. When using classifications with the old machine learning methods, especially the use of inherently lazy class More

  Due to the increasing speed of information production and the need to convert information into knowledge, old machine learning methods are no longer responsive. When using classifications with the old machine learning methods, especially the use of inherently lazy classifications such as the k-nearest neighbor (KNN) method, the operation of classifying large data sets is very slow. Nearest Neighborhood is a popular method of data classification due to its simplicity and practical accuracy. The proposed method is based on sorting the training data feature vectors in a binary search tree to expedite the classification of big data using the nearest neighbor method. This is done by finding the approximate two farthest local data in each tree node. These two data are used as a criterion for dividing the data in the current node into two groups. The data set in each node is assigned to the left and right child of the current node based on their similarity to the two data. The results of several experiments performed on different data sets from the UCI repository show a good degree of accuracy due to the low execution time of the proposed method. Manuscript profile