background: with the recent spread of virtual learning programs in universities, especially in the field of medical sciences, libraries play a crucial role to support these programs. this study aimed at investigating the skills required by librarians to support virtual learning programs in isfahan university and isfahan university of medical sciences.   methods: this was an applied survey study...

 Abstract The conventional analytical channel models for multiple-input multiple-output (MIMO) wireless radio channels are array dependent. In this paper, we present several array independent MIMO channel models that inherit the essence of analytical models. The key idea is to decompose the physical scattering channel into two parts using the manifold decomposition technique: one is the wavefi...

there has been a recent development and explosion of interest among academicians across a wide range of disciplines in the use of virtual class room. utilization of the virtual class room as a laboratory experimentation for teaching and learning has increased significantly in recent years as development tools for web based applications have become easier to use and computers have become more ca...

with the advent of cyberspace and development of data and information, virtual cities were presented as new forms of city management in different layers and territories. historic and tourism virtual city are among eight types of virtual cities. in this article some guidelines were presented in order to design and manage them based on tehran tourists' need assessment. theoretical framework ...

Virtualization has become a key technology for simplifying service management and reducing energy costs in data centers. One of the challenges faced by data centers is to decide when, how, and which virtual machines (VMs) have to be consolidated into a single physical server. Server consolidation involves VM migration, which has a direct impact on service response time. Most of existing solutio...

LiDAR has been a major interest of photogrammetry to acquire three dimensional objects. It has shown its promising capabilities in building virtual reality applications, such as virtual campus and virtual historic sites. However, point clouds of LiDAR data always occupy a large sum of storage capacity. This blocks further fast processing of LiDAR data to combine with GIS to build virtual realit...

This research concentrates on the design and analysis of an algorithm referred to as Virtual Network Configuration which uses predicted future states of a system for faster network configuration and management. Virtual Network Configuration is applied to the configuration of a wireless mobile Asynchronous Transfer Mode network. Virtual Network Configuration is built on techniques from parallel ...

A virtual cluster is a promising technology for reducing management costs and improving capacity utilization in datacenters and computer centers. However, recent cluster virtualization systems do not have the maximum scalability and flexibility required, due to limited hardware resources at one site. Therefore, we are now developing an advanced cluster management system for multi-site virtual c...

Multinational Enterprises face major impediments to transferring firm specific advantages within the MNE network given their relatively low capacity to absorb knowledge from other internationally dispersed units. Additionally, because MNE units are located in two (or more) distinct nations, the effectiveness of crossborder transfer of organizational knowledge is profoundly affected by the cultu...