Sharif Digital Repository

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... 

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... 

With the emergence of 5G networks, response time is becoming increasingly more important. 5G networks facilitate usage of Mobile Edge Computing. MEC provides computing capabilities at the edges of cellular networks. Since the computational capability in mobile devices is limited, running high performance applications using external resources is a way to overcome this limitation. Workload offloading in MEC is an approach that provides additional computation capability for users to meet the desired response time. In this study, we presented a Mixed Integer Non-Linear Programing model for offloading different workloads on a heterogeneous set of MEC servers to minimize the SLA violations. We... 

In recent years, the subject of student mobility has become one of the most important areas of migration studies. The growing number of students moving from developing countries to developed ones has raised many concerns. Governments and institutions related to this issue have always tried to adopt policies to encourage the return of their diaspora students after graduation. However, to propose evidence-based policies there is a need to understand what shapes the intention of the Iranian international students to return or stay. This study tries to look at the factors that shape the intention of Iranian international students after graduation using the theory of planned behaviour.In the... 

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... 

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... 

Natural selection in structured populations is considered a crucial subject in evolutionary and population genetics. There is no explicit relationship between discrete-time stochastic models such as the Moran process and continuous-time models such as the Fisher-Kolmogorov equation. However, under specific conditions and within the limits of natural selection and weak selection, a connection can be found between these two models. To gain a better understanding of the specific relationship between these two models, we obtain partial differential equations for the spatiotemporal dynamics of natural selection by extending the birthdeath and death-birth processes of the Moran process to a...