The retrial phenomenon occurs inherently in a wide range of queueing systems. The
majority of retrial queueing models do not account for vacation. However, in practice, retrial …

We consider a single server feedback retrial queueing system with orbital search. An
arriving customer finding the server idle enters into service immediately; otherwise, the …

In this article the single-server queue situation described with batch arrivals, a mandatory
first service and a choice of second service are provided to the customers. A general …

There are differences among programming languages. In contrast to C/C++ in Linux,
standard Java timer has some issues, such as uncontrollable execution order, unpredictable …

This paper deals with single server retrial queue with fluctuating modes of service. Server
provides M modes of service with different service rates. At the arrival epoch of a batch, if the …