We analyze the so-called Shortest Queue First (SQF) queueing discipline whereby a unique server addresses queues in parallel by serving at any time that queue with the smallest workload. Considering a stationary system composed of two parallel queues and assuming Poisson arrivals and general service time distributions, we first establish the functional equations satisfied by the Laplace transfo...

This paper contributes to a line of research that aims to apply agent-oriented techniques in the field of service-oriented computing. In particular, we propose to use goal-oriented techniques from the field of cognitive agent programming for service orchestration. The advantage of using an explicit representation of goals in programming languages is the flexibility in handling failure that goal...

The Internet needs protocols and mechanisms to provide guaranteed quality of service. The existing Internet is surprisingly close to providing good quality for a very wide range of services, probably because the TCP protocols aim to achieve, and come to close to achieving, fair queueing, or processor sharing, whenever several flows compete for limited resources. The DiffServ architecture aims t...

The objective of this project was to determine the genetic control of conception rate, or pregnancy percentage in Angus beef heifers. Producers from 6 herds in 5 states provided 3,144 heifer records that included breeding dates, breeding contemporary groups, service sires, and pregnancy check information. Two hundred fourteen sires of the heifers were represented; with 104 sires having less tha...

In this paper we study two echelon multi-server tandom queueing systems where customers arrive according to a poisson process with two different rates. The service rates at both echelons are independent of each other. The service times of customers is assumed to be completed in two stages. The service times at each stage are exponentially distributed. At the first stage, the customers may balk ...

Service-Oriented Architecture (SOA) is a way of designing, developing, deploying, and managing enterprise systems where business needs and technical solutions are closely aligned. SOA offers a number of potential benefits, such as cost-efficiency and agility. However, adopting SOA is not without considerable challenges. For example, the most common way to implement a SOA-based system is with We...

Service personalization has direct consequences on service perception and service evaluation. As number of mobile users continue to rise, researchers must focus on addressing the problem of inadequate service personalization due to lack of effective mobile service personalization system. This study underscores the importance of the need for an optimized design for the smartphone based web servi...