The application of cluster computer systems has escalated dramatically over the last several years. Driven by a range of applications that need relatively low-cost access to high performance computing systems, clusters computers have reached worldwide use. In this paper we outline the results of using three generations of cluster machines at JPL for a select set of applications drawn from a lar...

Computer aided design and computer aided modeling tools are becoming increasingly important in the design and performance evaluation of communication systems. In this work, we report on the computer simulation modeling study of terrestrial digital microwave radio transmission, using Block Oriented System Simulator package (BOSS). The work concentrates on semi-analytical error rate evaluation in...

the brain – computer interface (bci) provides a communicational channel between human and machine. most of these systems are based on brain activities. brain computer-interfacing is a methodology that provides a way for communication with the outside environment using the brain thoughts. the success of this methodology depends on the selection of methods to process the brain signals in each pha...

This paper presents the concepts of database systems as well as the overview of the use of Unified Modeling Language (UML) as a standard notation of real-world objects in developing object-oriented design methodology for computer applications. The UML is a tool for specifying software systems that include standardized diagrams to define, illustrate and visually map or model a software system's ...

goal is to raise awareness in process industry around the problem of safety applications of computer based systems and provide indications of today's best practices. The document does not intend to be neither a guideline nor a state-of-art. Participation of individuals in the development of this document shall not be construed as an unreserved endorsement of the proposed practices by the indivi...

Small computing devices are everywhere changing the way people communicate and interact, however applications for these devices are developed more or less with the same tools used for conventional computer applications. Developers of handheld computer applications can find few options for development. In this paper we present MADEE a development and execution environment for mobile information ...

Gas chromatograph/mass spectrometer/computer systems can be used to quantify a wide variety of compounds of clinical interest. A quadrupole instrument operated in the chemical ionization (Cl) mode was used in these studies. Because of the sensitivity and specificity of selective ion detection, it is possible to make measurements routinely in the nanogram to picogram range, with 0.1-1.0 ml sampl...

The task of designing and configuring large Computer Networks most suited to a certain application and environment is difficult, as it requires highly specialized technical skills and knowledge, as well as a deep understanding of a dynamic commercial market. Current expert systems have made solid achievements in supporting decision makers, they use prior experience to solve problems in differen...

1Programa de Pós Graduação em Informática Aplicada, Laboratório de Bioinformática, Universidade de Fortaleza, Fortaleza, CE, Brazil 2Department of Software Engineering, Kaunas University of Technology, Kaunas, Lithuania 3Department of Informatics, Instituto de Telecomunicações and ALLab Assisted Living Computing and Telecommunications Laboratory, Universidade da Beira Interior, Covilhã, Portuga...

A Rasiowa-Sikorski system is a sequence-type formalization of logics. The system uses invertible decomposition rules which decompose a formula into sequences of simpler formulae whose validity is equivalent to validity of the original formula. There may also be expansion rules which close indecomposable sequences under certain properties of relations appearing in the formulae, like symmetry or ...