Wireless communications has become ubiquitous these days. With the advent of multimedia applications, there is a need for higher bandwidth and faster data rates. A Medium Access Control (MAC) protocol is required for effective utilization of network resources and to transmit multimedia traffic classes with quality of service requirements. In the proposed Dynamic MAC protocol under low load cond...

In this work, we introduce slot selection and co-allocation algorithms for parallel jobs in distributed computing with nondedicated resources. The job launch requires a co-allocation of a specified number of slots starting synchronously. The challenge is that slots associated with different CPU nodes of distributed computational environments may have arbitrary start and finish points that do no...

rail operations from infrastructure ownership and management, the government-owned national railways still maintain a symbiotic relationship with infrastructure providers. New entrants to rail business face considerable hurdles in terms of access to infrastructure and operations at border crossings. Moreover, passenger traffic has precedence over freight traffic. Thus, train timetables are crea...

Multimedia and real-time applications require bandwidth guarantees, which may be achieved by resource reservation. Several researches were done to propose efficient reservation MAC protocols for ad-hoc networks. In these schemes, channel is segmented into super-frames composed of fixed number of slots. They allocate slots to each traffic source, and make sure that neighbor nodes record the rese...

We have developed a power performance tradeoff methodology for portable reconfigurable computing systems. There are two basic techniques which we employ to vary the power and performance of the application: frequency change and core change. For this methodology we implement a given algorithm with varying power performance levels: we call these implementations, Cores. Each core is characterized ...

We consider a simple automatic warehousing sytem with a lot of storage spaces called slots in which only a single type of items are stored and retrieved. The purpose of this paper is to develop an efficient method for obtaining the marginal probability that each of the slots in the warehouse is full. The set of such probabilities for all the slots constitutes the spatial inventory distribution ...

This paper investigates the performance of digital pulse interval modulation (DPIM) in the presence of multipath propagation and additive white Gaussian noise. To combat intersymbol interference (ISI) guard slots and a non-linear equaliser have been introduced. The average optical power requirements (AOPR) due to ISI for cases with/without guard slots and with equaliser are analysed using a cei...

We study the problem of unsupervised ontology learning for semantic understanding in spoken dialogue systems, in particular, learning the hierarchical semantic structure from the data. Given unlabelled conversations, we augment a frame-semantic based unsupervised slot induction approach with hierarchical agglomerative clustering to merge topically-related slots (e.g., both slots “direction” and...

Five-Phase Reservation Protocol (FPRP) is a single channel, Time Division Multiplex Access (TDMA) based broadcast scheduling protocol for Ad Hoc network. A modified Medium Access Control (MAC) protocol based on FPRP for decreasing packet delay is proposed in this paper. In FPRP, There are quite a lot of reservation cycles in slots is not fully used, especially in latter slots, for the reason th...

Doodle is a simple and popular online system for scheduling events. It is an implementation of the approval voting mechanism, where candidates are the time slots and each responder approves a subset of the slots. We analyze all the Doodle polls created in the US from JulySeptember 2011 (over 340,000 polls), consisting of both hidden polls (where you cannot see other people’s votes) and open pol...