In this paper we analyze a tollbooth tandem queueing problem with an infinite number of servers. A customer starts service immediately upon arrival but cannot leave the system before all customers who arrived before himlher have left, i.e. customers depart the system in the same order as they arrive. Distributions of the total number of customers in the system, the number of departure-delayed c...

There is mounting evidence that global climate change has extended growing seasons, changed distribution patterns, and altered the phenology of flowering, breeding, and migration. For migratory birds, the timing of arrival on breeding territories and over-wintering grounds is a key determinant of reproductive success, survivorship, and fitness. But we know little of the factors controlling earl...

A standardized maximum likelihood departure, a standardized score departure, the signed likelihood root: these are familiar inference outputs from statistical packages, with the signed likelihood root often viewed as the most reliable. A third-order adjusted signed likelihood root called r∗ is available from likelihood theory, but the formulas and development methods are not always easily imple...

this essay examines greetings as one of the elements of politeness in a nigerian community and how it influences the cultural characteristics of the people. to analyze, this essay makes use of speech act theory and politeness principle and also considers the pragmatic context in analyzing different types of greetings such as condolences, departure and arrival, rejoicing, daily greetings, casual...

The berth-allocation problem (BAP) aims to optimally schedule and assign vessels to berthing areas along a quay. The vessels arrive at the port over a period of time and normally request service and departure within a time window. These time windows are usually determined through contractual agreements between the port operator and the carrier, in terms of time of departure after the vessel’s a...

The exact analysis of a network of queues with multiple products is, in general, prohibited because of the non-renewal structure of the arrival and departure processes. Two-moment approximations (decomposition methods, Whitt [9]) have been successfully used to study these systems. The performance of these methods, however, strongly depends on the quality of the approximations used to compute th...