Twenty crash scenarios were developed based on actual rural road crashes obtained from an in-depth crash database. With the assistance of Robert Bosch (Australia) Pty. Ltd., the scenarios were simulated using vehicle models with and without Electronic Stability Control (ESC) fitted. In two of the scenarios, no simulation was necessary as the driver made no attempt to avoid a collision. In six s...

This study extends the analysis in [1] where the effect of the round trip propagation delay on performance measures of an Asynchronous Transmission WDMA protocol is examined for infinite population and Poisson arrivals. An other attribute, associated with the WDM networks, that affects their behaviour is the receiver collision phenomenon. Especially this paper examines the influence on throughp...

Intersection collisions account for a significant portion of accidents and fatalities on roadways. We are developing a vehicle-to-vehicle cooperative collision warning system as part of our effort to enhance driver’s awareness of roadway situation and to reduce the accident rate. Central to the system is a threat assessment algorithm that is based on location and velocity information of the sub...

A single multiaccess channel is studied with the outcome of a transmission being either 'idle'. 'success'. or 'collision' (ternary channel). Packets involved in a collision must be retransmitted, and an efficient way to solve a collision is known in the literature as Gallager-Tsybakov-Mikhailov (G1M) algorithm. which falls into class of interval-searching contention resolution algorithms. Perfo...

We develop a version of coupling which can be used to study many birthday attacks, simplifying a key step in past analysis and making it possible to extend the analysis to additional problems. This leads us to confirm a conjecture of Pollard’s that the Kangaroo method starting in an interval of size N with steps sizes {x}k=1 for fixed x has the same collision time of (2 + o(1)) √ N as does x = ...

Hash functions play an important role in various cryptographic applications. Modern cryptography relies on a few but supposedly well analyzed hash functions which are mostly members of the so-called MD4-family. This work shows whether it is possible, using special-purpose hardware, to significantly speedup collision search for MD4-family hash functions. A thorough analysis of the computational ...

Purpose – Most of the existing approaches for flight collision avoidance are concerned with local traffic alone for which the separation is based on the pairwise analysis of aircraft trajectory trends, which is not efficient with regard to some flight path requirements along waypoints. The purpose of this paper is to deal with the global collision avoidance problem which aims at separating airc...

Aerosol particle reactions with vapor molecules and molecular clusters are often collision rate limited, hence determination of particle-vapor molecule and particle-molecular cluster collision rates are of fundamental importance. These collisions typically occur in the mass transfer transition regime, wherein the collision kernel (collision rate coefficient) is dependent upon the diffusive Knud...

Frothers havea profoundeffectonbubble size and also flotation efficiency. In present study the effect of type and dosage of frothers on the flotation response of coarse particles of quartz was investigated.  Therefore, flotation response of coarse particles using frothers such as MIBC, pine oil, poly propylene glycol with concentration of 0, 25, 50 and 75...

In this paper we investigate gravitational instability of shocked gas layers using linear analysis. An unperturbed state is a self-gravitating isothermal layer which grows with time by the accretion of gas through shock fronts due to a cloud-cloud collision. Since the unperturbed state is not static, and cannot be described by a self-similar solution, we numerically solved the perturbation equa...