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Publicações

Publicações por CTM

2004

Supporting adaptable distributed systems with FORMAware

Autores
Moreira, RS; Blair, GS; Carraoatoso, E;

Publicação
Proceedings - International Conference on Distributed Computing Systems

Abstract
The interactive and ubiquitous nature of future distributed services (e.g. digital libraries, learning systems, etc.) will make them more architectural and resource demanding. Consequently, next generation middleware frameworks should support both shorter and longer-term adaptation (i.e. a priori and a posteriori reconfiguration). In fact, current component standards leverage software reusability and diminish development costs. Nevertheless, it is also a fact that existing middleware, which succeeded in meeting the goals of heterogeneity and interoperability, is not open enough for tackling the problem of dynamic evolution. This paper presents FORMAware, a framework that combines a novel component-based programming model enhanced by a reflective design, the former capturing the knowledge about software architecture abstractions (e.g. components, connectors, style managers, style rules) while the latter offering architecture awareness by explicitly opening the content and structure of both atomic and composite components (via introspection and adaptation meta-objects). In addition, FORMAware provides a set of tools and services for automating software development and adaptation (i.e. support for the generation, assembly, deployment and dynamic reconfiguration processes).

2004

Aesthetic evaluation of conservative breast cancer treatment. Can measuring help?

Autores
Cardoso, MJ; Leitao, I; Moura, AJ; Santos, AC; Cardoso, J; Barros, H; Oliveira, MC;

Publicação
EJC SUPPLEMENTS

Abstract

2004

Aesthetic evaluation of conservative breast cancer treatment: new scales of agreement or disagreement?

Autores
Cardoso, MJ; Leitao, I; Moura, AJ; Santos, AC; Cardoso, J; Barros, H; Oliveira, MC;

Publicação
EJC SUPPLEMENTS

Abstract

2004

INDEPTH: Timeliness assessment of ethernet/IP-based systems

Autores
Pereira, N; Tovar, E; Pinho, LM;

Publicação
IEEE COMPUTER SOCIETY'S 12TH ANNUAL INTERNATIONAL SYMPOSIUM ON MODELING, ANALYSIS, AND SIMULATION OF COMPUTER AND TELECOMMUNICATIONS SYSTEMS - PROCEEDINGS

Abstract
The continuous improvement of Ethernet technologies is boosting the eagerness of extending their use to also cover factory-floor distributed real time applications. Indeed, it is remarkable the considerable amount of research work that has been devoted to the timing analysis of Ethernet-based technologies in the past few years. It happens, however, that the majority of those works are restricted to the analysis of sub-sets of the overall computing and communication system, thus without addressing timeliness in a holistic fashion. To this end, in this paper we address an approach, based on simulation, aiming at extracting temporal properties of Commercial-Off-The-Shelf (COTS) Ethernet-based factory-floor distributed systems. This framework is being applied to a specific COTS technology, Ethernet/IP. In this paper, we reason about the modeling and simulation of Ethernet/IP-based systems, and on the use of statistical analysis techniques to provide useful results on timeliness.

2004

Timeliness in COTS factory-floor distributed systems: What role for simulation?

Autores
Pereira, N; Tovar, E; Pinho, LM;

Publicação
WFCS 2004: IEEE INTERNATIONAL WORKSHOP ON FACTORY COMMUNICATION SYSTEMS, PROCEEDINGS

Abstract
In the past few years, a significant amount of work has been devoted to the timing analysis of Ethernet-based technologies. However, none of these address the problem of timeliness evaluation at a holistic level. This paper describes a research framework embracing this objective. It is advocated that, simulation models can be a powerful tool, not only for timeliness evaluation, but also to enable the introduction of less pessimistic assumptions in an analytical response time approach, which, most often, are afflicted with simplifications leading to pessimistic assumptions and, therefore. delusive results. To this end, we address a few inter-linked research topics with the purpose of setting a framework for developing tools suitable to extract temporal properties of Commercial-Off-The-Shelf (COTS) factory-floor communication systems.

2004

Color and Turbidity evolution in the ageing process of Port Wine

Autores
Manuel, L; Oliveira, C;

Publicação
SARATOV FALL MEETING 2003: OPTICAL TECHNOLOGIES IN BIOPHYSICS AND MEDICINE V

Abstract
Port Wine ageing process is very important to produce the most appreciated and expensive wines from the class. The process takes decades to accomplish and involves particular techniques which are taken inside refrigerated cellars. Different wines pass through such process to produce 10 year, 20 year, 30 year and 40 year Ports. There are no documented data about color or turbidity evolution during the ageing process. We decided to verify the states of color and spectral turbidity of different aged Gold white port wine. The acquired results show a spectral evolution on transmition and scattered radiation along with color modification which are a close and direct consequence of adopted corrective measures. In measuring the four samples, we have used our spectronephelometer with optical fiber tips to illuminate sample and to acquire transmitted or scattered radiation. Transmition results were calibrated with a standard spectrophotometer at our laboratory, and scattered spectra were measured considering a system calibration with ISO12103 standard dust. We are aware that the four samples were harvested in different years, but the wine type is the same and the ageing process does not differ from one sample to another.

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