724 In 1981, an internal study by American Airlines found that travel agents booked the first flight that appeared on their computer screen 53 percent of the time, and a flight that appeared somewhere on the first screen almost 92 percent of the time. This provided an incentive for American to manipulate the order in which flights were listed on American’s “Sabre” computer reservation system, w...

This paper explores the need, development of computerized passenger reservation system for Indian railways. The passenger reservation system is based on online transaction processing. It was given the name Integrated Multitrain Passenger REServation System (IMPRESS) which later developed into single image system called Countrywide Network Of Computerized Enhanced ReservaTion (CONCERT). Then thi...

This paper argues that a risk averse of workers after-tax reservation wage the difference between her reservation wage and the tax needed to fund the unemployment insurance system when liquidity constraint binds exists and it is unique. The optimality of unemployment insurance based on the responsiveness of reservation wage to unemployment benefit shows the disincentive effect, i.e. higher unem...

this paper argues that a risk averse of workers after-tax reservation wage the difference between her reservation wage and the tax needed to fund the unemployment insurance system when liquidity constraint binds exists and it is unique. the optimality of unemployment insurance based on the responsiveness of reservation wage to unemployment benefit shows the disincentive effect, i.e. higher unem...

OF DISSERTATION Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Engineering The University of New Mexico Albuquerque, New Mexico

This paper proposes a medium-access control (MAC) protocol for integrated voice/data services in local wireless communications. The proposed protocol is a hybrid of R-Aloha and Aloha reservation adapted to local wireless environment. In the proposed hybrid Aloha-reservation/R-Aloha (HAR) protocol, data messages are transmitted using Aloha-reservation protocol, whereas voice packets are transmit...

The IEEE 802.16e Broadband Wireless Access (BWA) system is developed to cater for rapidly growing requirement for multimedia wireless services. Since the heterogeneous services provided by the system are connection-oriented, Call Admission Control and required resource reservation mechanisms are needed to achieve desired quality of service (QoS). Traditional admission control algorithms are bas...

SUMMARY A variable partition duplex scheme on packet reservation multiple access protocol (VPD-PRMA) is analyzed in this paper. We assume a four-state speech model for a conversational pair and successfully obtain performance measures by approximate Markovian analysis. Analytical results show that they quite fit simulation results; and VPD-PRMA can get higher statistical multiplexing gain than ...