As any frequent flier is no doubt aware, flight delays and cancellations are a largely inevitable part of commercial air travel. In the past ten years, only twice have more than 80% of commercial flights arrived on-time or ahead of schedule. Punctuality is an issue for all major carriers, with some struggling more than others: through September 2008, American Airlines flights were on time just ...

Deficit Round Robin (DRR) and Weighted Deficit Round Robin schedulers have shown their ability in providing fair and weighted sharing of network resources for network devices. However, they are unable to provide fairness in terms of waiting time of packets among flows. We propose a new packet scheduling discipline, Weighted Deficit Earliest Departure First scheduler. It provides fairness in ter...

Burke’s theorem is a well-known fundamental result in queueing theory, stating that a stationary M/M/1 queue has a departure process that is identical in law to the arrival process and, moreover, for each time t , the following three random objects are independent: the queue length at time t , the arrival process after t and the departure process before t . Burke’s theorem also holds for a stat...

In this paper the end-to-end performance evaluation of a tagged session is considered through the study of a tandem queueing network. A service discipline is adopted at each queue which allows for the study of First-Come First-Served (FCFS) as well as peak-rate-enforcing multiplexing schemes. A numerical approach is presented which allows for the computation of delay, jitter and inter-departure...

A lane departure warning system is one of the emerging systems for reducing traffic accidents. LDWS is a system designed to warn a driver when the vehicle begins to move out of its lane boundaries on roads. Different techniques to implement LDWS have been surveyed. Implementation of LDWS on different platforms is studied. Refer ences

OBJECTIVES Vehicle-based crash avoidance systems can potentially reduce crashes, but success depends on driver acceptance and understanding. This study gauged driver use, experience, and acceptance among early adopters of select technologies. METHODS Telephone interviews were conducted in early 2009 with 380 owners of Volvo vehicles equipped with forward collision warning with autobrake, lane...