Autonomous vehicles rely on the accurate estimation of their pose, speed and direction of travel to perform basic navigation tasks. Although GPSs are very useful, they have some drawbacks in urban applications. Visual odometry is an alternative or complementary method, because it uses a sensor already available in many vehicles for other tasks and provides the ego motion of the vehicle with eno...

This paper analyses the requirements of performing parallel transaction-oriented simulations with a special focus on the space-parallel approach and discrete event simulation synchronisation algorithms that are suitable for transaction-oriented simulation and the target environment of Ad Hoc Grids. To demonstrate the findings a Java-based parallel transaction-oriented simulator for the simulati...

In this paper we analyse the requirements of performing parallel transaction-oriented simulations within loosely coupled systems like ad hoc grids. We focus especially on the space-parallel approach to parallel simulation and on discrete event synchronisation algorithms that are suitable for transaction-oriented simulation and the target environment of ad hoc grids. To demonstrate our findings,...

Managers benefit from information systems in decision-making processes. A number of cognitive tools are included decision support systems. When these examined, it is seen that most them produce statistical solutions. However, some cases, solution approaches cannot exact results. At this point, using simulation methods can give effective results making managerial decisions. In order to effective...

The objective of the study reported herein was to design and validate a general simulation model of a hospital's critical care units, such that with minor changes to the model's input variables, the model can be used to represent the critical care area in a variety of different hospitals. A model was written in GPSS/H and validated for four Department of Veterans Affairs medical centers (VAMCs)...

In a recent study of z > ∼ 0.1 active galactic nuclei (AGN), we found that 21-cm absorption has never been detected in objects in which the ultra-violet luminosity exceeds LUV ∼ 10 W Hz. In this paper, we further explore the implications that this has for the currently popular consensus that it is the orientation of the circumnuclear obscuring torus, invoked by unified schemes of AGN, which det...