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All Journal ComEngApp : Computer Engineering and Applications Journal
Manijeh Keshtgari
Shiraz University of Technology
Computer Science & IT Engineering

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A New Method for Intelligent Message Network Management in Ubiquitous Sensor Networks Maryam Karimi; Reza Javidan; Manijeh Keshtgari
Computer Engineering and Applications Journal Vol 3 No 3 (2014)
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (703.832 KB) | DOI: 10.18495/comengapp.v3i3.69

Abstract

Ubiquitous Sensor Network (USN) computing is a useful technology forautonomic integrating in different environments which can be available anywhere.Managing USN plays an important role on the availability of nodes and paths. Inorder to manage nodes there is a cyclic route starts from manager, passing nodes,and come back to manager as feedback. In this paper, a new, self-optimizing methodpresented for finding this cyclic path by combining epsilon greedy and geneticalgorithm and then it is compared with other well-known methods in terms of cost ofthe route they find and the power consumption. The results show that the route thatis found by our new method costs at least 53% less than other methods. However insome cases, it uses 32% more energy for finding the route which can be compensatein traversing the shorter route. The overall simulation results in prototype data showthe effectiveness of the proposed method.
Performance Analysis of Multiple Virtualized Servers Sajad Homayoun; Ahmad Jalili; Manijeh Keshtgari
Computer Engineering and Applications Journal Vol 4 No 3 (2015)
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.137 KB) | DOI: 10.18495/comengapp.v4i3.150

Abstract

Server virtualization is considered as one of the most significant changes in IT operations in the past decade, making it possible to manage groups of servers with a greater degree of reliability at a lower cost. It is driven by the goal of reducing the total number of physical servers in an organization by consolidating multiple applications on shared servers. In this paper we construct several x86_64 servers based on VMware vSphere, and then analyze their performances using open source analyzing tools Pylot and Curl-loader. The results show that despite the enormous potential benefits of virtualization techniques, the efficiency decreased by increasing the number of virtual machines. So, a trade-off is needed between number of virtual machines and expected efficiency of servers.
Co-Authors Ahmad Jalili Maryam Karimi Reza Javidan Sajad Homayoun