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computer science Society (SCCC) International Conference Chilean FLAGGED

作者： Marcelo Schots Claudia Susie C. Rodrigues Claudia Werner Leonardo Murta System Engineering and Computer Science COPPE/UFRJ Rio de Janeiro Brazil Instituto de Computação Universidade Federal Fluminense Rio de Janeiro Brazil

Creation, interpretation, and evolution of models and diagrams are activities commonly performed in software projects, and the teaching of such activities is fundamental for software engineering education. However, it is difficult to see the changes made in model corrections, evolutions, or maintenance done by the student, as well as by the teacher, comparing templates and different solutions. In this regard, this paper presents the use of the PREViA approach, which aims at visualizing software architecture models. This work focuses on supporting teaching and learning in the modeling education context. A feasibility study was conducted and its results provided positive evidences of the use of the approach in the correction of diagrams.

关键词： Unified modeling language Education Software computer architecture Context Software architecture Measurement

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An agent-based architecture for knowledge management in context-aware business processes

An agent-based architecture for knowledge management in cont...

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International Conference on computer Supported Cooperative Work in Design

作者： De C. Gatti, Leonardo A. Santoro, Flávia Maria Nunes, Vanessa T. NP2TEC - Research and Practice Group in Information Technology Department of Applied Informatics Federal University of the State of Rio de Janeiro UNIRIO Rio de Janeiro Brazil COPPE - Systems Engineering and Computer Science Program Federal University of Rio de Janeiro UFRJ Rio de Janeiro Brazil

ISBN: (纸本)9781424467631

The main knowledge management challenges are to capture, store and reuse contextual knowledge generated during interactions that occur daily in an organization. In this paper, we propose an activity context-aware architecture to support knowledge management in working processes. The required features for this architecture are processing, reasoning and sharing contextual knowledge involving information about activities performed. We also present results from evaluation of our proposal - A-CoBrA - for a specific domain. © 2010 IEEE.

关键词： Knowledge management

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Movement Persuit Control of an Offshore Automated Platform via a RAM-based Neural Network

Movement Persuit Control of an Offshore Automated Platform v...

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International Conference on Control, Automation, Robotics and Vision

作者： Horacio L. Franca Joao Carlos P. da Silva Omar Lengerke Max S. Dutra Massimo De Gregorio Felipe M. G. Franca Computer Science Department Mathematics Institute Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil Mechanical Engineering Program COPPE Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil Istituto di Cibernetica "Eduardo Caianiello" Consiglio Nazionale delle Ricerche (CNR) Naples Italy System Engineering and Computer Science Program COPPE Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil

ISBN: (纸本)9781424478149

The reproduction of the movements of a ship by automated platforms, without the use of sensors providing exact data related to the numeric variables involved, is a non-trivial matter. The creation of an artificial vision system that can follow the cadence of said ship, in six axes of freedom, is the goal of this research. Considering that a real time response is a requisite in this case, it was decided to adopt a Boolean artificial neural network system that could identify and follow arbitrary interest points that could define, as a group, a model of the movement of an observed vessel. This paper describes the development of a prototype based on the Boolean perceptron model WiSARD (Wilkie, Stonham and Aleksander's Recognition Device), that is being implemented in the C programming language on a desktop computer using a regular webcam as input.

关键词： Stewart platform weightless neural networks WiSARD

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A parallel architecture for Ray-Tracing

A parallel architecture for Ray-Tracing

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IEEE Latin American Symposium on Circuits and systems (LASCAS)

作者： Alexandre S. Nery Nadia Nedjah Felipe M.G. França LAM - Computer Architecture and Microeletronics Laboratory Systems Engineering and Computer Science Program COPPE Universidade Federal do Rio de Janeiro Department of Electronics Engineering and Telecommunications Universidade do Estado do Rio de Janeiro

Real time rendering of three-dimensional scenes in high photorealistic detail is a hard task, such as in the Ray Tracing rendering algorithm. However, parallel implementations of Ray Tracing have been enabling real time performance, as the algorithm is embarrassingly parallel. Thus, a custom parallel design in hardware is likely to achieve an acceptable performance. In this paper, we propose a hardware parallel architecture capable of dealing with the main desirable features of Ray Tracing, such as shadows and reflection effects, imposing low area cost and acceptable rendering performance.

关键词： computer architecture Interrupters computers Light sources Process control Real-time systems Telecommunications

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WANN-Tagger: A weightless artificial neural network tagger for the portuguese language

WANN-Tagger: A weightless artificial neural network tagger f...

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作者： Carneiro, Hugo C. C. França, Felipe M. G. Lima, Priscila M. V. Systems Engineering and Computer Science Program/COPPE Universidade Federal do Rio de Janeiro Caixa Postal 68511 21941-972 Rio de Janeiro RJ Brazil Department of Mathematics Universidade Federal Rural do Rio de Janeiro Km 47 Campus Universitário BR-465 23890-000 Seropédica RJ Brazil

ISBN: (纸本)9789898425324

Weightless Artificial Neural Networks have proved to be a promising paradigm for classification tasks. This work introduces the WANN-Tagger, which makes use of weightless artificial neural networks for labelling Portuguese sentences, tagging each of its terms with its respective part-of-speech. A first experimental evaluation using the CETENFolha corpus indicates the usefulness of this paradigm and shows that it outperforms traditional feedforward neural networks in both accuracy and training time, and also that it is competitive in accuracy with the Hidden Markov Model in some cases. Additionally, WANN-Tagger shows itself capable of incrementally learning new tagged sentences during runtime.

关键词： Feedforward neural networks

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Analyzing shotgun proteomic data with patternlab for proteomics

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Current Protocols in Bioinformatics 2010年第SUPPL. 30期Chapter 13卷 13.13.1-13.13.15页

作者： Carvalho, Paulo C. Yates III, John R. Barbosa, Valmir C. Systems Engineering and Computer Science Program COPPE Federal University of Rio de Janeiro Rio de Janeiro Brazil Brazil Scripps Research Institute La Jolla CA United States

PatternLab for proteomics is a one-stop shop computational environment for analyzing shotgun proteomic data. Its modules provide means to pinpoint proteins/peptides that are differentially expressed and those that are unique to a state. It can also cluster the ones that share similar expression profiles in time-course experiments, as well as help in interpreting results according to Gene Ontology. PatternLab is user-friendly, simple, and provides a graphical user interface. Copyright © 2010 John Wiley & Sons, Inc.

关键词： label-based proteomic analysis label-free proteomic analysis shotgun proteomics

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An agent-based architecture for knowledge management in context-aware business processes

An agent-based architecture for knowledge management in cont...

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International Conference on computer Supported Cooperative Work in Design

作者： Leonardo A. de C. Gatti Flávia Maria Santoro Vanessa T. Nunes NP2TEC - Research and Practice Group in Information Technology UNIRIO Rio de Janeiro Brazil NP2TEC-Research and Practice Group in Information Technology Department of Applied Informatics UNIRIO Federal University of Rio de Janeiro Rio de Janeiro Brazil COPPE - Systems Engineering and Computer Science Program UFRJ Rio de Janeiro Brazil

关键词： Knowledge management computer architecture Context modeling Collaborative work Proposals Information technology Informatics Service oriented architecture Ontologies Knowledge engineering

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SpMT WaveCache: Exploiting thread-level parallelism in WaveScalar

SpMT WaveCache: Exploiting thread-level parallelism in WaveS...

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2009 WRI World Congress on computer science and Information engineering, CSIE 2009

作者： Pei, Songwen Wu, Baifeng Du, Min Chen, Gang Marzulo, Leandro A. J. Franca, Felipe M. G. School of Computer Science Fudan University 200433 Shanghai China Systems Engineering and Computer Science Program COPPE Rio de Janeiro Brazil

ISBN: (纸本)9780769535074

Speculative Multithreading (SpMT) increases the performance by means of executing multiple threads speculatively to exploit thread-level parallelism. By combining software and hardware approaches, we have improved the capabilities of previous WaveScalar ISA on the basis of Transactional Memory system for the WaveCache Architecture. Threads are extracted at the course of static compiling, and speculatively executed as a thread-level transaction that is supported by extra hardware components, such as Thread-Context-Table (TCT) and Thread-Memory-History (TMH). We have evaluated the SpMT WaveCache with 6 real benchmarks from SPEC, Mediabench and Mibench. On the whole, the SpMT WaveCache outperforms superscalar architecture ranging from 2X to 3X, and great performance gains are achieved over original WaveCache and Transactional WaveCache as well. © 2008 IEEE.

关键词： Memory architecture

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Improving a web usability inspection technique using qualitative and quantitative data from an observational study

Improving a web usability inspection technique using qualita...

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SBES 2009 - 23rd Brazilian Symposium on Software engineering

作者： Conte, Tayana Vaz, Verônica Massolar, Jobson Mendes, Emilia Travassos, Guilherme Horta Manaus Brazil Systems Engineering and Computer Science Program COPPE UFRJ Rio de Janeiro Brazil Computer Science Department University of Auckland Auckland New Zealand

ISBN: (纸本)9780769538440

We have proposed a checklist-based usability inspection technique (WDP - Web Design Perspectives-Based Usability Evaluation) specific for Web applications' usability evaluation and we are following an experimentation-based methodology to support its development and improvement. This paper describes an observational study conducted, aimed at eliciting how inspectors apply the WDP technique. We discuss the quantitative and qualitative results of the result and their impact on improving the WDP technique. We analyzed the qualitative data using the procedures from the Grounded Theory (GT) method. © 2009 IEEE.

关键词： Inspection

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Incorporating information of value in a component repository to support a component marketplace infrastructure

Incorporating information of value in a component repository...

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2009 IEEE International Conference on Information Reuse and Integration, IRI 2009

作者： Dos Santos, Rodrigo Pereira Werner, Cláudia Maria Lima Da Silva, Marlon Alves COPPE/UFRJ System Engineering and Computer Science Federal University of Rio de Janeiro P.O. Box 68511 Rio de Janeiro RJ 21945-970 Brazil

ISBN: (纸本)9781424441167

One of the most popular approaches to work with Software Reuse is Component-Based Software engineering (CBSE). Despite a strategic importance in the global economy and the existent component repositories, the promised benefits of CBSE could not be broadly evaluated until now due to the lack of mature and well-established component marketplaces. Moreover, to create and maintain these markets, historical data and value considerations can be strategies to investigate. This paper proposes a value-based approach to address these strategies, Brechó-VCM, focusing on the stakeholders' value realization and on building a value chain. ©2009 IEEE.

关键词： computer software reusability

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