Received ; accepted – 2 – ABSTRACT We study numerically the evolution of an adiabatic relativistic fireball expanding into a cold uniform medium. We follow the stages of initial free expansion and acceleration, coasting and then deceleration and slowing down to a non-relativistic velocity. We compare the numerical results with simplified analytical estimates. We show that the relativistic self ...

A coasting hadron beam with an elliptical transverse profile, uniform charge density, and small four-dimensional (4D) emittance could improve accelerator performance in several contexts. phase space painting method to generate such a distribution is being tested the Spallation Neutron Source (SNS) accumulator ring. critical component of these efforts measure 4D during accumulation. The can be r...

Recently there have been several proposals for `eco-driving assistance systems', designed to save fuel or electrical power by encouraging behaviours such as gentle acceleration and coasting a stop. These systems use optimal control find driving behaviour that minimises vehicle energy losses. In this paper, we introduce methodology account driver preferences on acceleration, braking, following d...

All the studies in urban railways gained importance with requirement of developing this area. However, not only technological development but also energy-saving conditions have great importance. One these efficiency is to know optimum operating conditions. There are two electronic drive-warning systems. These warning systems Driver Advisory System (DAS) and Automatic Train Operation (ATO), whic...

Genetically attenuated vaccines capable of limited replication in the vaccinate may elicit stronger, longer-lasting immunity than that induced by component, killed whole-cell, or nonreplicating live vaccines. We have isolated and partially characterized temperature-sensitive Pseudomonas aeruginosa mutants of two different phenotypes: a tight mutant, which ceases all growth immediately after its...

OBJECTIVES To present our experience in 48 coasted patients and how they performed in terms of the number of eggs collected, numbers of embryos available for embryo transfer after in vitro fertilization, pregnant and on going pregnancy rate. METHODS The study was conducted at Lister Hospital, London, United Kingdom, during the period October 1998 through to May 2001. For the purpose of the st...