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    Regional Convergence and Regional Migration: Evidence from Iranian Provinces

    , M.Sc. Thesis Sharif University of Technology Ansari, Mahdi (Author) ; Vesal, Mohammad (Supervisor) ; Nili, Masoud (Supervisor)
    In this paper we answer to the following questions: First, whether we obseve conditional convergance indicating that the poor Iranian provinces tend to grow faster than the rich ones? Second, has inter-provinces migration helped the convergence? Three different indices are used for examining inter-province convergance. These include: per capita expenditure and per capita income both from the household survey since 1364 to 1394 and per capita regional GDP since 1379 to 1393. Our results support the convergance phenomena based on all three different indices. For the second question, we use instrumental variable to resolve the potential endogeneity problem caused by the reversed causality... 

    Characteristics of Different Clusters of Studends who Migrated in 1370s

    , M.Sc. Thesis Sharif University of Technology Hajjeforoush, Mohammad Saeed (Author) ; Aslani, Shirin (Supervisor)
    Every year, a high percentage of university graduates go abroad to continue their studies. Large amount of them, especially those who graduated from better universities, do not return to Iran. the emigration of these people, who are considered to be of the best graduates in the country, and their non-return to the country leads to Decrease in the average capability of the country's human resources, waste of resources spent on them from a national perspective, Decrease in the productivity at the internal universities, industries and services and increase in the country's scientific distance from the other countries. the 1370s are an important section in the country's history due to post-war... 

    Microservices migration patterns

    , Article Software - Practice and Experience ; Volume 48, Issue 11 , 2018 , Pages 2019-2042 ; 00380644 (ISSN) Balalaie, A ; Heydarnoori, A ; Jamshidi, P ; Tamburri, D. A ; Lynn, T ; Sharif University of Technology
    John Wiley and Sons Ltd  2018
    Microservices architectures are becoming the defacto standard for building continuously deployed systems. At the same time, there is a substantial growth in the demand for migrating on-premise legacy applications to the cloud. In this context, organizations tend to migrate their traditional architectures into cloud-native architectures using microservices. This article reports a set of migration and rearchitecting design patterns that we have empirically identified and collected from industrial-scale software migration projects. These migration patterns can help information technology organizations plan their migration projects toward microservices more efficiently and effectively. In... 

    Effect of nanofluid treatment on water sensitive formation to investigate water shock phenomenon, an experimental study

    , Article Journal of Dispersion Science and Technology ; Volume 35, Issue 7 , 21 May 2014 , Pages 889-897 Habibi, A ; Heidari, M. A ; Al-Hadrami, H ; Al-Ajmi, A ; Al-Wahaibi, Y ; Ayatollahi, S ; Sharif University of Technology
    Permeability reduction in porous media as a result of frail and tenuous fine particles migration would decrease the productivity index in the subterranean reservoirs. During reservoir stimulation by injecting fluids into the reservoir, as the salinity condition of the formation brine changes, fine particles initiate the triggering process. In this study, MgO-based nanofluid as a fines fixation agent was stably prepared based on the particle size distribution and characterized through transmission electron microscopy analysis. Afterward, several core flooding tests were performed using Berea sandstone cores to study the effect of nanofluid injection on fines fixation in the water shock... 

    The propagation of laser light in skin by Monte Carlo-diffusion method: A fast and accurate method to simulate photon migration in biological tissues

    , Article Journal of Lasers in Medical Sciences ; Volume 2, Issue 3 , 2011 , Pages 109-114 ; 20089783 (ISSN) Golshan, M. A ; Tarei, M. G ; Ansari, M. A ; Amjadi, A ; Sharif University of Technology
    Introduction: Due to the importance of laser light penetration and propagation in biological tissues, many researchers have proposed several numerical methods such as Monte Carlo, finite element and green function methods. Among them, the Monte Carlo method is an accurate method which can be applied for different tissues. However, because of its statistical nature, Monte Carlo simulation requires a large number of photon pockets to be traced, so it is computationally expensive and time-consuming. Although other numerical methods based on the diffusion method are fast, they have two important limitations: first, they are not valid near the bounder of sample and source, and second, their... 

    Task migration in three-dimensional meshes

    , Article Journal of Supercomputing ; 2010 , Pages 1-25 ; 09208542 (ISSN) Bargi, A ; Sarbazi Azad, H ; Sharif University of Technology
    As a result of the emerging use of mesh-based multicomputers (and recently mesh-based multiprocessor systems-on-chip), issues related to processor management have attracted much attention. In a mesh-based multiprocessor, after repeated submesh allocations and de-allocations, the system network may be fragmented, i.e. there might be unallocated nodes in the network. As a result, in a system with contiguous processor allocation, no new tasks can start running due to the lack of enough free adjacent processors to form a suitable submesh. Although there might be enough free processors available, they remain idle until the allocator can find a set of adjacent free nodes forming a submesh to be... 

    Path simplification under difference area measure

    , Article 2009 14th International CSI Computer Conference, CSICC 2009, 20 October 2009 through 21 October 2009, Tehran ; 2009 , Pages 276-279 ; 9781424442621 (ISBN) Daneshpajouh, S ; Zarei, A ; Ghodsi, M ; Sharif University of Technology
    In this paper, we consider path simplification problem under difference area (diff-area) measure. Diff-area measure is defined as AA(Q) AB(Q) , where AA(Q) is the area under Q and above P and AB(Q) is the area above Q and under P (sec Figure 1). Bose et al. [1] presented an approximation algorithm for finding a simplificd path with at most k verticcs that minimizes the cliff-area measure which only works on i-monotone paths. The constraint of being i-monotone is restrictive in some applications like tracking bird migration paths or map boundary simplification. Here, we extend the method of Rosc et al. [1] and present algorithms with the same time complexities as theirs for gcneral paths.... 

    Balance between place attachment and migration based on subjective adaptive capacity in response to climate change: the case of Famenin county in western iran

    , Article Climate and Development ; 2017 , Pages 1-14 ; 17565529 (ISSN) Khanian, M ; Serpoush, B ; Gheitarani, N ; Sharif University of Technology
    The effects of climate change have disturbed the living patterns of many people around the globe during the past decade and it has been a key contributing factor to mass migrations. The ‘adaptation’ approach is currently considered the most effective available solution for balancing out these effects. As a result, many researchers are trying to find out how to increase the adaptive capacity of individuals and communities in response to the effects of climate change. The effect of place attachment as a factor which connects human societies to the surrounding environment is undeniable. In this regard, the present study attempts to analyse the role of place attachment in increasing the... 

    A hybrid algorithm to reduce energy consumption management in cloud data centers

    , Article International Journal of Electrical and Computer Engineering ; Volume 9, Issue 1 , 2019 , Pages 554-561 ; 20888708 (ISSN) Tarahomi, M ; Izadi, M ; Sharif University of Technology
    Institute of Advanced Engineering and Science  2019
    There are several physical data centers in cloud environment with hundreds or thousands of computers. Virtualization is the key technology to make cloud computing feasible. It separates virtual machines in a way that each of these so-called virtualized machines can be configured on a number of hosts according to the type of user application. It is also possible to dynamically alter the allocated resources of a virtual machine. Different methods of energy saving in data centers can be divided into three general categories: 1) methods based on load balancing of resources; 2) using hardware facilities for scheduling; 3) considering thermal characteristics of the environment. This paper focuses... 

    A model to support context-aware service migration in pervasive computing environments

    , Article 9th World Multi-Conference on Systemics, Cybernetics and Informatics, WMSCI 2005, Orlando, FL, 10 July 2005 through 13 July 2005 ; Volume 3 , 2005 , Pages 394-399 ; 9806560558 (ISBN); 9789806560550 (ISBN) Hemmati, H ; Ranjbar, A ; Niamanesh, M ; Jalili, R ; Sharif University of Technology
    Continuous improvement and extension of pervasive computing environments, in which objects have high mobility and limited computing power, implies service migration to be considered as one of the main issues. On the other hand, context-awareness which is the most distinguishable feature of pervasive computing helps better serving of users. Accordingly, migration in the presence of context-awareness is considered as the underlying of our motivation. This improves the performance of migration, which is not easily achievable through traditional migration techniques. In this paper we introduce a model to support context-aware migration besides its migration process phases and framework. Our... 

    Reverse time migration by Krylov subspace reduced order modeling

    , Article Journal of Applied Geophysics ; Volume 151 , April , 2018 , Pages 298-308 ; 09269851 (ISSN) Mahdavi Basir, H ; Javaherian, A ; Shomali, Z. H ; Dehghani Firouz Abadi, R ; Gholamy, S. A ; Sharif University of Technology
    Elsevier B.V  2018
    Imaging is a key step in seismic data processing. To date, a myriad of advanced pre-stack depth migration approaches have been developed; however, reverse time migration (RTM) is still considered as the high-end imaging algorithm. The main limitations associated with the performance cost of reverse time migration are the intensive computation of the forward and backward simulations, time consumption, and memory allocation related to imaging condition. Based on the reduced order modeling, we proposed an algorithm, which can be adapted to all the aforementioned factors. Our proposed method benefit from Krylov subspaces method to compute certain mode shapes of the velocity model computed by as... 

    Investigating the Factors Affecting the Migration of Iranian University Students Using the Clustering Method

    , M.Sc. Thesis Sharif University of Technology Mohammadi, Mohammad Ali (Author) ; Aslani, Shirin (Supervisor)
    Nowadays, the brain drain problem has become a challenge for countries of origin (COO) and a blessing for countries hosting student migrants. This issue has been studied in many domestic and international types of research. These studies' results can lead to the ability to identify the causes and discover methods to solve this problem. For several decades, the human capital flight has been one of the most challenging educational-economic-social problems in Iran and has grown significantly in recent years. The waste of the country's resources, the ineffectiveness of the education provided to students to improve the country's condition and its construction, the social and psychological... 

    Numerical simulation of electro-deposition process influenced by force convection and migration of ions

    , Article Journal of Electroanalytical Chemistry ; Volume 782 , 2016 , Pages 117-124 ; 15726657 (ISSN) Zahraei, M ; Saidi, M. S ; Sani, M ; Sharif University of Technology
    Elsevier B.V  2016
    Electro-deposition process is one of the main steps in the LIGA procedure to fabricate microstructures. In this paper, one-dimensional modeling of Nickel electro-deposition process is implemented on Rayan and developed for simulation of time-dependence diffusion and migration of charge species with reduction reactions on the cathode surface. This model is proposed by considering governing equations on electro-kinetic phenomena consist of Nernst-Plank equation and Poisson's equation of electric potential. Transport of ions toward the cathode is considered based on the effect of convection, reaction rate, diffusion and migration. The numerical results cover two series of data consisting of... 

    Task migration in mesh NOCs over virtual point-to-point connections

    , Article 19th International Euromicro Conference on Parallel, Distributed, and Network-Based Processing, PDP 2011, Ayia Napa, 9 February 2011 through 11 February 2011 ; 2011 , Pages 463-469 ; 9780769543284 (ISBN) Goodarzi, B ; Sarbazi Azad, H ; Sharif University of Technology
    Processor allocation in todays many core MPSoCs is a challenging task, especially since the order and requirements of incoming applications are unknown during design stage. To improve network performance, balance the workload across processing cores, or mitigate the effect of hot processing elements in thermal management methodologies, task migration is a method which has attracted much attention in recent years. Runtime task migration was first proposed in multicomputer with load balancing as the major objective. However, specific NoC properties such as limited amount of communication buffers, more sensitivity to implementation complexity, and tight latency and power consumption constraints... 

    Implementation of Range Doppler Algorithm in Synthetic Aperture Radar

    , M.Sc. Thesis Sharif University of Technology Ebrahimi, Behrouz (Author) ; Vosughi Vahdat, Bijan (Supervisor) ; Nayebi, Mohammad Mehdi (Co-Advisor)
    Today, the use of radar technology and its various applications in different areas of science is no secret. The developed countries are looking to increase their ability to use new radar tools. Synthetic aperture radar is one of the most modern and efficient equipment imaging of the surface. One of the major advantages of synthetic aperture radar is imaging capabilities at night and bad weather conditions if the imaging methods used in the camera have limitations in night and bad weather conditions. There are different methods for extracting the images, one of the most important algorithms is Range Doppler Algorithm which is used to obtaining images from raw data received. Because of the... 

    Task migration in mesh NOCs over virtual point-to-point connections

    , Article Proceedings - 19th International Euromicro Conference on Parallel, Distributed, and Network-Based Processing, PDP 2011 ; 2011 , p. 463-469 ; ISBN: 9780769543284 Goodarzi, B ; Sarbazi-Azad, H ; Sharif University of Technology
    Processor allocation in todays many core MPSoCs is a challenging task, especially since the order and requirements of incoming applications are unknown during design stage. To improve network performance, balance the workload across processing cores, or mitigate the effect of hot processing elements in thermal management methodologies, task migration is a method which has attracted much attention in recent years. Runtime task migration was first proposed in multicomputer with load balancing as the major objective. However, specific NoC properties such as limited amount of communication buffers, more sensitivity to implementation complexity, and tight latency and power consumption constraints... 

    Parallel machine scheduling problem with preemptive jobs and transportation delay

    , Article Computers and Operations Research ; Vol. 50, issue , Oct , 2014 , p. 14-23 Shams, H ; Salmasi, N ; Sharif University of Technology
    In this research the parallel machine scheduling problem with preemption by considering a constant transportation delay for migrated jobs and minimization of makespan as the criterion i.e., Pm|pmtn(delay)|Cmax is investigated. It is assumed that when a preempted job resumes on another machine, it is required a delay between the processing time of the job on these two machines. This delay is called transportation delay. We criticize an existing mathematical model for the research problem in the literature [Boudhar M, Haned A. Preemptive scheduling in the presence of transportation times. Computers & Operations Research 2009; 36(8):2387-93]. Then, we prove that there exists an optimal schedule... 

    On the dissemination of the discourse of going: The case of Iranian for-profit study abroad institution's chronotopic representation of ideal life there

    , Article Language and Communication ; Volume 80 , September , 2021 , Pages 11-24 ; 02715309 (ISSN) Jamshidi, S ; Rezaei, S ; Sharif University of Technology
    Elsevier Ltd  2021
    This research addresses the escalation of the ‘discourse of going’ among Iranian educated people in recent years through highlighting the influential role played by for-profit study abroad institutions. Utilizing a discourse-analytic approach, we engage the theoretical concept of chronotope, caliberation, and commodification to investigate the ways through which for-profit study abroad institutions represent the images of ‘life beyond’. The data were obtained in interview sessions with ten certified Iranian study-abroad institutions. The results of the data analysis revealed two main themes, namely, hypothetical utopia there and dystopia here as well as success here-and-now and... 

    Lifetime-Aware Resource Allocation in Cloud Computing for Energy Optimization

    , M.Sc. Thesis Sharif University of Technology Moghadam, Marziyeh (Author) ; Goudarzi, Maziar (Supervisor)
    Cloud computing is a way to increase capacity or add capabilities dynamically without investing in new infrastructure. The purpose of this project is the use of specialized algorithms for efficient energy management for cloud computing environments.One of the issues that is very important with respect to cloud computing is considering lifetime of servers or physical machines. Servers are some of the most important and critical elements of cloud computing. Server costseffect on the costs of the entire cloud computing system and the interference of serverseffects on entire system. Lifetime of each sever is dependent on a few factors, the most important of which is the number of switching... 

    Task Migration in 3D NoCs Using Game Theory

    , M.Sc. Thesis Sharif University of Technology Hassanpour Ghadiو Neda (Author) ; Hessabi, Shahin (Supervisor)
    Combination of 3D IC technology and network on chip (NoC) is an effective solution to increase system scalability, and also alleviate the interconnect problem in large scale integrated circuits. However, due to the increased power density in 3D NoC systems and the destructive impact of high temperatures on chip reliability, applying thermal management solutions becomes crucial in such circuits. Since hardware thermal control techniques, such as DVFS, can cause significant degradation on chip performance, in this thesis we propose a runtime distributed migration algorithm based on game theory to balance the heat dissipation among processing elements (PEs) in 3D NoCs. The objective of this...