In this paper, a finite-source retrial queueing system with twoway communication is investigated the help of simulation program own. If randomly arriving request from finds single server idle its service starts immediately, otherwise it joins an orbit where generates retrial/repeated calls after random time. To increase utilization when becomes time outgoing called for infinity source. Upon arr...

A single server finite population queueing model with compulsory server vacation and with fixed batch service has been considered. For this model the system steady state probabilities are obtained. Some performance measures are calculated and numerical examples are also given.  

in this paper a single server queuing production system is considered which is subject to gradual deterioration. the system is discussed under two different deteriorating conditions. a planning horizon is considered and server which is a d/m/1 queuing system is gradually deteriorates through time periods. a maintenance policy is taken into account whereby the server is restored to its initial c...

objective: to compare the effectiveness of bibliotherapy and cognitive behavioral therapy on depression of students with emotional breakdown. method: this is a quasi-experimental pretest-posttest against a control group. the population includes all referred students to kharazmi university counselling center; 20 samples were selected using a convenience sampling method.  findings: the results co...

This document is the first deliverable of work package three – Modelling and Design. It covers white papers that have been produced and peer-reviewed by the M-Zones partners by the end of July 2003. Purpose of this document is to provide a holistic view of accomplished work regarding the modelling and design of management concepts/systems for smart spaces and to evaluate the research quality of...

Global software development is an inexorable trend in the software industry. The impact of the trend in conventional software development can be found in many of its aspects. One of them is task or work package allocation. Task allocation was traditionally driven by resource competency and availability but GSD introduces new complexities to this process including time-zones differences, costs a...

Optimised maintenance can reduce operating costs by demanding less resources and avoiding equipment breakdown, hence ensuring that daily manufacturing and production will not be interrupted. Web-based maintenance is one of the most efficient methods for optimising maintenance. The Web-based maintenance system that we have developed uses virtual instruments, to provide remote sensing, monitoring...

Queueing models with disasters can be used to evaluate the impact of a breakdown or system reset in service facility. In this paper, we consider discrete-time single-server queueing general independent arrivals and times study effect occurrence on behavior. Disasters occur independently from time slot according Bernoulli process result simultaneous removal all customers system. General probabil...

Two types of service; Re-service; Modified vacation; Balking; Service interruption Abstract This paper deals with the steady state analysis of batch arrival retrial queueing system with two types of service under modified vacation policy, where each type consists of an optional re-service. An arriving batch may balk the system at some particular times. After the completion of each types of serv...

Distances between ontologies are useful for searching, matching or visualising ontologies. We study the various distances that can be defined across ontologies and provide them in a NeOn toolkit plug-in, OntoSim, which is a library of distances that can be used for recontextualising. The following partners have taken an active part in the work leading to the elaboration of this document, even i...