This paper presents a decomposition technique for the service station reliability in a discrete-time repairable Geom/G/1 queueing system, in which the server takes exhaustive service and multiple adaptive delayed vacation discipline. Using such a novel analytic technique, some important reliability indices and reliability relation equations of the service station are derived. Furthermore, the s...

This paper discusses examples, p a r t i c u l a r l y hypo the t i ca ls , t he i r use and generat ion, in legal reasoning. It examines the use of sequences of hypo the t i ca ls .

In this paper, we describe the open knowledge structure of Roman Tutor, a simulation-based intelligent tutoring system we are developing to teach astronauts how to manipulate the Space Station Remote Manipulator (SSRMS), known as “Canadarm II”, on the International Space Station (ISS). We show that by representing the complex ISS-related knowledge in the form of a threelayered architecture with...

The quality of life in cities is one the most attractive research cases for researchers and urban planners. Best-Worst Method (BWM) recent multi-criteria decision-making methods (MCDM). In this study, we have tried to rank districts 1, 2, 3 & 8 Tabriz city by using a combination BWM TOPSIS Geographic Information System (GIS) capabilities. Twenty criteria been considered study. At first, map was...

An investigation of ferroresonance in a 230-kV transformer is undertaken. Correct modelling of the iron-core losses and the direct magnetic coupling between phases are shown to be important in duplicating field observations. A brute-force time-domain method and an analytical method for displaying margins to ferroresonance on a parameter plane are compared. Following proposed bus modifications, ...

The paper studies closed queueing networks containing a server station and k client stations. The server station is an infinite server queueing system, and client stations are single server queueing systems with autonomous service, i.e. every client station serves customers (units) only at random instants generated by strictly stationary and ergodic sequence of random variables. The total numbe...

This paper presents an application designed to train electrical sub-station operators by means of a virtual reality environment. The application allows full viewing of any of the sub-stations in the power supply network. With the appropriate hardware (HMD, 3D mouse and tracking systems) it is possible to navigate into the virtual world and interact with the elements. Each of the sub-station com...