Flow state tables are an essential component for improving the performance of packet classification in network security and traffic management. Generally, a hash table is used to store the state of each flow due to its fast lookup speed. However, hash table collisions can severely reduce the effectiveness of packet classification using a flow state table. In this paper, we propose three schemes...

Motivated by the design of a future autonomous, decentralized air traffic management system for runway-independent aircraft, a biologically-inspired reactive collision avoidance algorithm is developed for a simple model of managing multiple vehicle systems. Techniques using gyroscopic forces and scalar potentials result in all vehicles arriving at their destinations within a reasonable time, wi...

OBJECTIVES To assess whether speed cameras reduce road traffic collisions and related casualties. DESIGN Systematic review. DATA SOURCES Cochrane Injuries Group Specialised Register, Cochrane Central Register of Controlled Trials, Medline, Embase, Social Science Citation Index, TRANSPORT database, ZETOC, the internet (including websites of road safety and motoring organisations), and contac...

STUDY OBJECTIVE To estimate the association between driver nationality and the risk of causing a collision between vehicles in motion. DESIGN Retrospective, matched by collision, case-control study. SETTING Collisions that occurred in Spain during the period from 1990 to 1999 were studied. PARTICIPANTS Responsible (case) and non-responsible (control) drivers identified in the databases of...

Motor vehicle collisions and crashes are a leading cause of death among Nevada residents aged 5-34 years, representing 14% of all injury deaths in that age group in 2010. During 2008-2011, a total of 173 pedestrian deaths from motor vehicle collisions occurred in Nevada, accounting for 16% of motor vehicle deaths in the state. Approximately 75% (2 million persons) of Nevada residents live in Cl...

Study objective: To estimate the association between driver nationality and the risk of causing a collision between vehicles in motion. Design: Retrospective, matched by collision, case-control study. Setting: Collisions that occurred in Spain during the period from 1990 to 1999 were studied. Participants: Responsible (case) and non-responsible (control) drivers identified in the databases of t...

This paper presents the findings of an analysis of 2572 police-reported collisions between bicyclists and motorists that occurred between January 1, 1997 and December 31, 1998 in the city of Toronto. The aim of the study was to identify the most significant kinds of car/bike collisions in the city, and to try to understand the factors involved. By “most significant” we mean those collisions whi...

BACKGROUND Deaths and injuries on the road remain a major cause of premature death among young people across the world. Routinely collected data usually focuses on the mechanism of road traffic collisions and basic demographic data of those involved. This study aimed to supplement these routine sources with a thematic analysis of narrative text contained in coroners' records, to explore the wid...

backgrounds and aims: using geographical information system (gis) can decreases the burden of road traffic injuries effectively by identification of hot spot to modification in hazardous areas. the aim of the study was determining geographical distribution of human risk factors associated with road traffic injuries by using geographical information system (gis) in iran. materials and methods: t...