The TranSend transformation proxy is an example of a new class of middleware services being deployed in the internet. TranSend performs lossy compression on Web data before delivering it to the end user, resulting in a 3-7 increase in surfing speed in return for degraded image quality. In this paper, we perform detailed measurements of the traffic and load that TranSend will experience from the...

We consider a single server queuing system with repeated attempts in which customers arrive according a Markov arrival process (MAP) and with a LCFS PR discipline. The service times are independent and have a common general distribution. After service completion time the server initiates his search time with an arbitrary distribution function. We consider two cases where the maximum number of r...

Barabasi has shown that the priority-based scheduling rules in single-stage queuing systems (QS) generate fat tail behavior for the task waiting time distributions (WTD). These fat tails are induced by the waiting times of very low priority tasks that stay unserved almost forever as the task priority indices are "frozen in time" (i.e., a task priority is assigned once for all to each incoming t...

Quality of Service (QoS) in the Internet depends on queuing and sophisticated scheduling in routers. In this paper, we address the issue of managing traffic flows with different priorities. In our reference model, incoming packets are first classified based on their priority, placed into different queues with different capacities, and then multiplexed onto one router link. The fuzzy nature of t...

A variety of methodological approaches have been developed to performance assessment for the adoption building information modeling (BIM) at organizational and project levels. Recently, active research has undertaken on quantitative analysis effects BIM projects through BIM-based design validation methodologies. Nevertheless, few studies addressed interactions between staff providing services p...

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Mean waiting time is of a greater concern wherever queuing system is involved. Priority Scheduling is the general method used to reduce the mean waiting time of higher priority processes. However this method just focuses on favouring higher priority processes leaving the lower priority processes out of consideration and forcing them to starve for a longer period resulting in higher average mean...

Recently, the problems of evaluating performances of switches and routers has been formulated as online problems, and a great amount of results have been presented. In this paper, we focus on managing outgoing packets (called egress traffic) on QoS (Quality of Service) switches, and analyze the performance of one of the most fundamental scheduling policies Priority Queuing (PQ) using competitiv...

The buffered crossbar switch architecture has recently gained considerable research attention. In such a switch, besides normal input and output queues, a small buffer is associated with each crosspoint. Due to the introduction of crossbar buffers, output and input contention is eliminated, and the scheduling process is greatly simplified. We analyze the performance of switch policies by means ...