This paper addresses two questions. Firstly, how is it possible for an application to become aware of network conditions and secondly, given this awareness, how can a system be designed that will allow application level adaptation? A framework enabling these adaptations, consisting of three components, is proposed: A network monitor makes available to applications measurements of the Quality of...

Congestion is one of the main issues in data envelopment analyses which have particular importance. Recently researches about congestion, whether in economic articles or in Operations Research articles in had grown increasingly. Congestion is a wasteful stage of the production process where outputs are reduced due to excessive amount of inputs. In economics, congestion is very important because...

In urban transportation networks, research work has been focusing on alleviating the traffic congestion to optimize the network performance, such as increasing the traffic flow and decreasing the user travel time. However, studying the physical properties of traffic propagation and congestion growing has always been a difficult task, especially in a large and complex transportation network. Pre...

We prove a strong inapproximability result for routing on directed graphs with low congestion. Given as input a directed graph on N vertices and a set of source-destination pairs that can be connected via edge-disjoint paths, we prove that it is hard, assuming NP doesn’t have n log n) time randomized algorithms, to route even a 1/N fraction of the pairs, even if we are allowed to use each edge ...

There is a strong demand for Quality of Service (QoS) in the internet. One key element of QoS is traffic management during congestion. Congestion occurs when aggregate load exceeds the capacity on bottleneck link. In this paper, congestion is caused by heterogeneous traffic. A queue builds up in the router servicing the bottleneck link. We advocate RED (random early detection) as AQM (active qu...

the new competitive environment changes the paradigm of power system operation. in the transmission area, open access process provides fair accessibility for all market participants. congestion management is one of the most important side effects of this new process. this paper proposes a new approach for congestion management which is based on both active and reactive re-dispatch of the networ...

of Fuzzy Sliding Mode Control (FSMC) based on Genetic Algorithms (GAs) roposed control strategy, a robust controller is designed for Active Queue n computer networks. AQM takes a trade-off between link utilization and ata packets. From control point of view, it is rational to regard AQM as a m. We design a fuzzy sliding mode controller for the AQM system as an nd apply the optimal searching alg...

The need to find solutions based on sustainable methods for the transportation sector in Iraq has become an urgent necessity due ever-increasing volume of traffic congestion caused mainly by increase number vehicles and total dependence them absence other alternatives. This drains all fossil energy addition losses time, health comfort users those close roads. Also, it increases costs maintainin...

during the last years, the concept of input congestion and technical ineff-ciency in data envelopment analysis (dea), have been investigated by manyresearchers. the motivation of this paper is to present models which obtain thedecreased output value due to input congestion and technical ineciency. more-over, we extend the models to estimate input congestion, technical ineciencyand output red...