In this paper, an M/M/1 queue with working vacation and vacation interruption is investigated. The server is supposed to take a working vacation whenever the system becomes empty and if there are at least N customers waiting in the system at a service completion instant, vacation interruption happens and the server resumes a normal working period. A matrix geometric approach is employed to obta...

The following individuals read and discussed the dissertation submitted by student Robin David Winslow, and they evaluated his presentation and response to questions during the final oral examination. They found that the student passed the final oral examination. iv DEDICATION I dedicate this dissertation to my wife Kathy who supported and encouraged me through another one of my foolish endeavo...

In this chapter, we review the sequence of events that resulted in the negotiated contractor work package and the subsequent string of contract modifications (see also Appendix A). It all began with a budget total established by the Navy in 1992. This was modified over the remainder of the decade in annual Navy budgets. The Navy, meanwhile, planned the work to be undertaken in the RCOH. NNS sub...

A case-based method is important activity for variety system modeling in system architecture. The project planning management method and work breakdown structure is a reason why cost is wasted and a number of project planning is failed. It is necessary to develop a structure of work breakdown structure identification and output selection along to project's planning specificity in project planni...

Closed expressions are derived for the pseudo-norm, norm and orthogonality relations for arbitrary bound states of the PT symmetric and the Hermitian Scarf II potential for the first time. The pseudo-norm is found to have indefinite sign in general. Some aspects of the spontaneous breakdown of PT symmetry are analysed.

Motivated by the need to study traffic incident management, we consider a Markovian infinite server queue that is subjected to randomly occurring shocks. These shocks affect the service of all servers to deteriorate, i.e., increase the service time of all servers, and might also cause other shocks, thus causing further service deterioration. There are a finite number of service levels, zero cor...