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 ...

this paper deals with the solution of a column with balcony loads. it is intended to determine the expressions for deflections and bending moments of the sections of a column under the action of transmitted loads from a balcony loaded at its free end by a force «p» and rigidly connected to the column somewhere between its ends. the action of this load on the column is equivalent to that of the ...

In this paper, the virtual synchronous generator (VSG) concept is utilized in controller of grid-connected dual two-level voltage source inverter (DTL VSI). First, topology VSG and DTL VSI are presented. Then, state-space equations (TL VSI), regarding presence phase-locked loop (PLL) VSG, given. Next, small-signal modeling TL realized. Eventually, stability enhancement compared with demonstrate...

This paper describes the design and application of a haptic device to study the mechanical properties of the human arm during interaction with compliant environments. Estimates of the human endpoint admittance can be obtained by recording position deviations as a result of force perturbations. Previous studies attempted to estimate the impedance by recording force as a result of position pertur...

In this paper, we present a new load balancing algorithm for parallel virtual architectures based on mobile agents. The proposed model is based on a reference diagnostic test performed by the host agent at the deployment time of the parallel application. This diagnostic test allows evaluating the computation performance and the communication latency of each node of the distributed system. The p...

in this paper, by investigating the common weights concept and dea models with nonlinear virtual inputs/outputs, we introduce a model for evaluating the decision making units with nonlinear virtual inputs and outputs based on the common weights.

User communities are rapidly transitioning their ‘‘traditional desktops’’ that have dedicated hardware and software installations into ‘‘virtual desktop clouds’’ (VDCs) that are accessible via thin-clients. To allocate and manage VDC resources for Internet-scale desktop delivery, existing works focus mainly on managing server-side resources based on utility functions of CPU and memory loads, an...