This paper deals with estimation of blocking probabilities for OBS switches with Fiber Delay Lines (FDLs) and full wavelength conversion. An incoming burst that finds the wavelengths occupied is temporarily stored in a FDL. Hence, contention will be sorted out successfully if the residual life of the system is smaller than the maximum FDL delay. In order to derive the blocking probability, the ...

This paper will examine the use of quantitative and qualitative methods as complementary research methods. It asks the fundamental question whether these two approaches can be used jointly in a principled manner. The pressure in educational research has been towards using the two methods alongside each other. In applied research the use of the two approaches in the same project is accepted yet ...

We study a phenomenon causing server time loss in ticket queues with balking and calling time. A customer who balks from the queue after printing leaves virtual entity that requires to be cleared. The longer queue, larger proportion of customers abandoning their place, due left queue. solution is suggested by giving best possible estimate her expected waiting before ticket, thus ensuring that, ...

Strategic customer behavior is strongly influenced by the level of information that provided to customers. Hence, optimize design queueing systems, many studies consider various versions same service model and compare them under different structures. In particular, two extreme are usually considered compared: observable in which customers informed about number system unobservable they only para...