This paper examines the Bernoulli admission control policy for the two phase bulk arrival retrial queueing system wherein the customers has the option either to take second phase of service or to leave the system after completing first essential phase of service. In addition, the arrival rate of the customers depends upon the server status. After the service completion of each individual custom...

Background Namibia faces a chronic shortage of pharmaceutical personnel. The high burden of HIV and AIDS, coupled with increased numbers of patients needing antiretroviral (ARV) services, has further exacerbated this shortage. Skills related to PSM are essential for ensuring continuous availability of essential medicines for public health programs, including HIV and AIDS and TB. Pre-service edu...

Abstract Evolutionary algorithms have proven to be very successful in solving multi-objective optimization problems (MOPs). However, their performance often deteriorates when constraints are introduced. This paper proposes a hybrid heuristic intelligence (HHI) approach remedy this issue. First, classification operator is designed sort individuals by relative constraint values, which enlarges th...

Service oriented architecture is a new paradigm to exponentially reduce the development time of applications. In a service oriented computing environment, consumers interact with service providers through service brokers to get a service done. The presence of a central service broker is essential in SOA paradigm. The roles of a service broker can be explained in terms of functionalities such as...

In this paper, we propose a four-layer enterprise architecture for service management. The aim of the proposed architecture is to provide an automated, centralized, real-time service management system solution at the enterprise level. This architecture covers essential service management functions and integration between these functions. The proposed architecture can be adopted as service manag...

This paper describes the ongoing work of IWebS (Intelligent Web Services) project, which studies the possibilities of the Semantic Web technology in creating an yellow page directory service for end-users. We propose an ontology-based mechanism for both advertising and finding the services. The essential parts of the system are ontologies for describing and storing service advertisements, a sem...

In this study, we consider a single server vacation queueing model with optional bulk service and an un-reliable server. A single server provides first essential service (FES) to all arriving customers one by one; apart from essential service, he can also facilitate the additional phase of optional service (OS) in batches of fixed size b(≥ 1), in case when the customers request for it. The serv...