Many authors have analyzed queueing systems with server breakdowns. Kendall (1953) studied stochastic processes occurring in the theory of queues and their analysis by the method of imbedded Markov chains. Buzacott and Hanifin (1978) classified the machine failures as operation dependent failures and time dependent failures. Shanthikumar (1982) analyzed a M/G/1 queueing system with time and ope...

In this paper, we analyze the characteristics of the dynamic job shop scheduling problem when machine breakdown and new job arrivals occur. A hybrid approach involving neural networks(NNs) and geneticalgorithm(GA) is presented to solve the dynamic job shop scheduling problem as a static scheduling problem. The objective of this kind of job shop scheduling problem is minimizing the completion ti...

This paper is concerned with the problem of production planning in a stochastic manufacturing system with serial machines that are subject to breakdown and repair. The machine capacities are modeled by a Markov chain. The objective is to choose the input rates at the various machines over time in order to meet the demand for the system’s production at the minimum long-run average cost of produc...

Recently, Chung published a paper in Expert Systems with Applications providing a correct solution procedure to the inventory system for the replenishment run time problem with machine breakdown and failure in rework in Lin and Chiu 〔2〕. In this short note, we provide a detailed discussion for the convex property in Chiu et al. 〔1〕, Lin and Chiu〔2〕and Chung〔3〕. Moreover, we will put forth an ex...

Speculative multithreading (SpMT) is a dynamic program parallelisation technique that promises dramatic speedup of irregular, pointer-based programs as well as numerical, loop-based programs. We present the design and implementation of software-only SpMT for Java at the virtual machine level. We take the full Java language into account and we are able to run and analyse real world benchmarks in...

Abstract: Quality assessment during dc motor manufacturing should be accomplished by quality controls in order to detect the different fault conditions associated to the components included in the machine. However, some defects can be produced by the automatic manufacturing process during the assembly of the individual components. Among others, inter-turns short-circuit, turn to earth short-cir...

We describe a novel computer-vision based system for facilitating the search for people across multiple non-overlapping cameras. The system has been applied in a retail environment for a variety of problems, most specifically for returns fraud prevention. The system detects and tracks people in multiple cameras and enables rapid cross-camera association of tracks. We have created a human-centre...

This study develops two extended economic manufacturing quantity (EMQ)-based models with a discontinuous product issuing policy, random machine breakdown, and rework failures. Various real conditions in production processes, end-product delivery, and intra-supply chains such as a producer-retailer integrated scheme are examined. The first model incorporates a discontinuous multi-delivery policy...