This paper deals with the analysis of a queueing system which may be used as a model for a computer system with terminals, the so-called CP-terminal system, or a machine-interference model. The system can be viewed as a single server queue with a number of finite Poisson sources, general service time distributions and a preemptive resume priority scheduling. A recursive scheme will be derived f...

Ontogenetic development of ocularity domains-stripes, patches and layers in cortex, colliculus superior and lateral geniculate nucleus-is the result of organization that may either be intrinsic to the postsynaptic structure or induced to it by the aaerents. A speciic type of axonal growth behaviour that was recently proposed as a basis for ontogenetic development of retinotopy is suucient to ac...

A computer program has been prepared that calculates the position of equipotential lines in cylindrical geometry for a multidielectric and multiconductor environment using a modified extrapolated Liebmann method. The output consists of printed voltages on evenly spaced grid coordinates, and an automatic drafting machine drawing of the dielectric and conductor boundaries and the equipotentials. ...

Palplates are a collection of touch-screen terminals placed around the office enabling human-computer interactions at the point of need. Supporting a community of mobile authenticated workers with a small number of stationary devices is an alternative to providing each person with a portable wireless computer. In contrast to the PC's desktop metaphor, Palplates use a place metaphor that reflect...

38 Computer The Cooler the Better: New Directions in the Nomadic Age T hanks to rapid progress in microelectronics technology, a new, nomadic lifestyle has become widespread these days. People, regardless of location, enjoy greater connectivity through communication networks and intelligent electronic terminals. This nomadic lifestyle will become even more common as technology frees people from...

An electronically tunable voltage-mode universal biquadratic filter with one input and five output terminals employing differential difference current conveyor transconductance amplifiers (DDCCTAs) has been proposed. The proposed circuit uses only two DDCCTAs, two grounded resistors and two grounded capacitors. It can realize all the five standard biquadratic filter functions, namely lowpass, b...

Most current Grid monitoring systems provide a visual user interface. With recent advances in multimedia capabilities in user terminals, there is a strong trend towards interactive, multi-modal and multi-platform visualization. In this paper we describe a multi-platform visualization architecture and a Web based service built upon it, which provides a view of the monitored Grid hierarchy, and t...

This paper presents a novel analysis of cochannel and adjacent channel reuse ratio distributions in DCA microcell systems, and compares the results with conventional FCA macrocell systems. Computer simulations show that DCA systems exhibit significantly closer channel reuse than FCA systems for a significant proportion of terminals. Mathematical analysis is used to show that this is a fundament...

This paper proposes an analytical study which aims at evaluating the received power statistics in DS-CDMA cellular systems which use a closed-loop power control scheme to compensate for fast multipath fading. The effects of a limited transmission power at the mobile terminals have been also investigated. This study is based on a first order Taylor expansion of the fast fading fluctuations. The ...

In 1986 Fiat and Shamir exhibited zero-knowledge based identification and digital Signature schemes which require only 10 to 30 modular multiplications per party. In this paper we describe an improvement of this scheme which reduces the verifier’s complexity to less than 2 modular multiplications and leaves the prover’s complexity unchanged. The new variant is particularly useful when a central...