razi psychiatry hospital is one of the most important clinical and educational fields with respect to mental health in iran. it has a long record of service in this regard since the last century. this piece of writing aims to make a concise acquaintance with its different goals, committees, departments, activities and investigational efforts.

Abstract In this work we show how the existence of long term variability in Variable Bit Rate (VBR) video traffic imposes the need of bandwidth renegotiation. In particular, two simple scenarios with a fixed renegotiation interval are considered. Using a real MPEG trace the renegotiation scheme is evaluated to prove its benefits in terms of bandwidth gain and quality of service. The problem of ...

Multimedia traffic which are generally VBR in nature require efficient adaptive resource allocation schemes when supported over Mobile Networks. Admission control schemes that satisfy the desired/guaranteed QoS for multimedia applications under different traffic loads to achieve high utilization need to be designed. Packet level QoS parameters include delay, packet loss probability and jitter w...

Analyzed the quality of service (Qos) scheduling mechanism of IEEE802. 11e, discussed the simple scheduling algorithm (Simple Scheduler) and its deficiencies exist in supporting variable bit-rate service (VBR). And then proposed a improved algorithm which adapts to the real time VBR service. The algorithm can dynamically adjust the service interval and the TXOP of per flow. Finally, implement t...

In 16], we proposed a new service called REnegotiated Deterministic Variable Bit Rate Service (RED-VBR). RED-VBR attempts to strike an eecient balance among tradeoos in quality of service, achievable network utilization, and method of dealing with overload situations. The approach is based on deterministic guarantees with client controlled renegotiation of traac and QOS parameters and graceful ...

Improving technical efficiency in agriculture can play an important role in meeting present and future demands for agricultural products, at the same time enhancing the long-term sustainability of land and water use. This paper examines the impact Financial support for the research was provided by the National Natural Science Foundation of China (71373127, 71573134, 71322301) and by the Program...