We consider a closed loop supply chain where new products are produced to order and returned products are refurbished for reselling. The solution to a price-setting problem enforces the “heavy traffic” condition, under which we address the production rate control problem for two types of cost functions. We solve a drift-control problem for an approximate system driven by a correlated two-dimens...

Cargo terminals are the gateways for entrance of commodities into the transportation network. Therefore, locating them in optimal location could have a major impact on the cost effectiveness and efficiency of transport, traffic safety and reduction in environmental pollutions. Due to the presence of a large number of parameters involved and the existing uncertainties, decision making in this fi...

The development of commercial real-time location system (RTLS) enables new ICT solutions. This paper presents an intelligent surveillance system for indoor high-security environments based on RTLS and artificial intelligence methods. The system consists of several software modules each specialized for detection of specific security risks. The validation shows that the system is capable of detec...

The Seismic Research Centre, University of the West Indies operates a seismic network that performs suboptimally in detecting, locating, and correctly determining the magnitude of earthquakes due to a diverse constituion of seismometers and the utilization of a site selection process that approximates an educated guess. My work seeks to apply Self-Organizing Maps (SOM) to arrive at the optimal ...

Most practical techniques for locating remote objects in a distributed system su er from problems of scalability and locality of reference. We have devised the Arrow distributed directory protocol, a scalable and local mechanism for ensuring mutually exclusive access to mobile objects. This directory has communication complexity optimal within a factor of (1+MST-stretch(G))=2, where MST-stretch...

Testing tasks can be viewed (and organized!) as games against nature. We study reachability games in the context of testing. Such games are ubiquitous. A single industrial test suite may involve many instances of a reachability game. Hence the importance of optimal or near optimal strategies for reachability games. One can use linear programming or the value iteration method of Markov decision ...