We present a functional and structural didactic simulator of Cache Memory Systems developed at the Pontifical Catholic University of Minas Gerais, Brazil. The development occurred during the undergraduatecomputer Arc...
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Fuzzy segmentation is a technique that assigns to each element in an image (corrupted by noise and/or shading) a grade of membership in an object (which is believed to be contained in the image). In an earlier work th...
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In this paper we describe the extensions to the RVision tool to support hardware performance counters monitoring at system level. This monitoring tool is useful for system administrators to detect applications that ne...
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Due to a widely use of XML language in various application domains, a well-established mechanism for the definition and enforcement of security controls on specific accesses to XML documents is demanded, in order to e...
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For more than a century the industrial sector was center stage for safety and health struggles. While industrial issues are still vital, the scope of conflict has broadened to include white‐collar and service occupat...
For more than a century the industrial sector was center stage for safety and health struggles. While industrial issues are still vital, the scope of conflict has broadened to include white‐collar and service occupations, which now constitute the overwhelming majority of American workers. In many workplaces, the air quality may be as poor as–or worse than–it is outdoors. Unions are becoming increasingly aware of such issues, and the Health and Safety Committee of the Professional Staff Congress of the City University of New York is taking an innovative approach to the problem with its “Got Air?” campaign.
We report on new results on the use of algebraic reconstruction techniques (ART) for reconstructing from helical cone-beam computerized tomography (CT) data. We investigate two variants of ART for this task: a standar...
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We report on new results on the use of algebraic reconstruction techniques (ART) for reconstructing from helical cone-beam computerized tomography (CT) data. We investigate two variants of ART for this task: a standard one that considers a single ray in an iterative step and a block version which groups several cone-beam projections when calculating an iterative step. Both algorithms were implemented using modified Kaiser-Bessel window functions, also known as blobs, placed on the body-centered cubic (bcc) grid. The algorithms were used to reconstruct a modified 3D Shepp-Logan phantom from data collected for the PI-geometry for two different maximum cone-beam angles (/spl plusmn/9.46/spl deg/ and /spl plusmn/18.43/spl deg/). Both scattering and quantum noise (for three different noise levels) were introduced to create noisy projections. The results presented here (for both noiseless and noisy data sets) point to the fact that, as opposed to filtered backprojection algorithms, the quality of the reconstructions produced by the ART methods does not suffer from the increase in the cone-beam angle.
The objective of this study is to propose a project management model which includes the unified process (UP) and UML language, for e-business software development in a physically distributed environment. The research ...
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One of the main factors that impede the practice of the telemedicine is not the lack of new technologies for the communication, but the lack of studies on the use of the technology already installed in the distant are...
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One of the main factors that impede the practice of the telemedicine is not the lack of new technologies for the communication, but the lack of studies on the use of the technology already installed in the distant areas, in way to be used of a rational way. The objective of the telemedicine is to provide help to the cares with the health with quality the distant areas of the great attendance centers. Therefore, it cannot ignore the fact that these areas do not make use of point technologies for communication. Then, it is justified the need to accomplish studies that facilitate the practice of the independent telemedicine of the installed technology. Then, the objective of this work is to use as pilot an unit of remote health, contributing with a support system that allows the practice of the telemedicine using the technology of available transmission in the respective place, avoiding that the factor cost is a barrier for the telemedicine projects and can begin an improvement process in the quality of the attendance in units of distant health of the great centers of medical attendance.
This paper presents our experiments for integrating OMG MIOP (Mullicast Inter-ORB Protocol) specifications into a CORBA ORB. We proposed an integration model which allows the coexistence of two different protocol stac...
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