The study of unreliable server retrial bulk queue with multiphase optional service is analyzed by incorporating the features balking, Bernoulli vacation and feedback. On occasion when occupied customers, an arriving customer finding long queue, can join orbit receives its later on making re-attempt. system reinforced multi phase along essential joining opt any one services after getting service...

This paper deals with finite-population, single and multi-server queueing systems with two classes of vacation mechanisms : station vacation and server vacation. In the first one, all the servers take vacation simultaneously whenever the system becomes empty, and they also return to the system at the same time, i.e., station vacation is group vacation for all servers. For the second class of va...

This paper considers discrete-time single-server queueing systems where the arrivals of cells are a timecorrelated arrival process and the service for cells is done every R slots. In particular, the arrivals is governed by a stationary Markov chain, where no arrivals are assumed to occur only when the Markov chain is in a particular state. A typical example of the arrival processes satisfying t...

ABSTARCT:This paper examines the steady state behavior of unreliable server in a batch arrival queue with two phases of heterogeneous service along with Bernoulli schedule and N-policy. The server provides two kinds of services in succession, the first stage service (FSS) followed by second stage service (SSS). As soon as both services are completed, the server may take a vacation or may contin...

Abstract: We analyze a discrete-time single-server queueing system whose arrival stream is a Bernoulli process and service times are generally distributed. An extension of the N -policy is considered: the server remains idle till the queue length becomes 1 i ≥ with probability i θ . After the idle (vacation) period, the server needs a random amount of startup time before serving. Moreover, afte...

Most vacations seem to have strong, but rather short-lived effects on health and well-being (H&W). However, the recovery-potential of relatively long vacations and the underlying processes have been disregarded. Therefore, our study focused on vacations longer than 14 days and on the psychological processes associated with such a long respite from work. In the present study, we investigated (1)...

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