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Kairos: an architecture for securing authorship and temporal information of provenance Data in Grid-Enabled workflow management systems

Kairos: an architecture for securing authorship and temporal...

引用

4th IEEE International Conference on eScience, eScience 2008

作者： Gadelha Jr., Luiz M.R. Mattoso, Marta Computer and Systems Engineering Program - COPPE Federal University of Rio de Janeiro Rio de Janeiro Brazil

ISBN: (纸本)9780769535357

Secure provenance techniques are essential in generating trustworthy provenance records, where one is interested in protecting their integrity, confidentiality, and availability. In this work, we suggest an architecture to provide protection of authorship and temporal information in grid-enabled provenance systems. It can be used in the resolu-tion of conflicting intellectual property claims, and in the reliable chronological reconstitution of scientific experiments. We observe that some techniques from public key infrastructures can be readily applied for this purpose. We discuss the issues involved in the implementation of such architecture and describe some experiments realized with the proposed techniques. © 2008 IEEE.

关键词： Architecture

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Personal Autonomic Desktop Manager with a circulatory computing approach

Personal Autonomic Desktop Manager with a circulatory comput...

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5th IEEE International Workshop on engineering of Autonomic and Autonomous systems

作者： Kopiler, Alberto Arkader Dutra, Ines de Castro Franca, Felipe M. G. Systems Automation Department CEPEL Electric Power Research Center Computer Science Department FCUP Porto University Systems Engineering and Computer Science Program COPPE/UFRJ Federal University of Rio de Janeiro

ISBN: (纸本)9780769531403

In this paper we present the architecture for the Personal Autonomic Desktop Manager, a self managing application designed to act on behalf of the user in several aspects: protection, healing, optimization and configuration. The overall goal of this research is to improve the correlation of the autonomic self* properties and doing so also enhance the overall self-management capacity of the desktop (autonomicity). We introduce the Circulatory Computing (CC) model, a self-managing system initiative based on the biological metaphor of the cardiovascular system, and use its concepts in the design and implementation of the architecture.

关键词： Cardiovascular system

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An Environment to Support Large Scale Experimentation in Software engineering

An Environment to Support Large Scale Experimentation in Sof...

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IEEE International Conference on engineering of Complex computer systems

作者： Guilherme H. Travassos Paulo Sérgio Medeiros dos Santos Paula Gomes Mian Paula Gomes Mian Neto Jorge Biolchini Systems Engineering and Computer Science Program COPPE/UFRJ Brazil COPPE/UFRJ Rio de Janeiro

Experimental studies have been used as a mechanism to acquire knowledge through a scientific approach based on measurement of phenomena in different areas. However it is hard to run such studies when they require models (simulation), produce amount of information, and explore science in scale. In this case, a computerized infrastructure is necessary and constitutes a complex system to be built. In this paper we discuss an experimentation environment that has being built to support large scale experimentation and scientific knowledge management in software engineering.

关键词： Large-scale systems Software engineering Knowledge engineering Knowledge management Distributed computing engineering management Software systems Software quality Area measurement Software measurement

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Supporting the selection of model-based testing approaches for software projects

Supporting the selection of model-based testing approaches f...

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3rd International Workshop on Automation of Software Test, AST 2008, held in Conjunction with the 30th International Conference on Software engineering, ICSE 2008

作者： Dias Neto, Arilo Claudio Travassos, Guilherme Horta Federal University of Rio de Janeiro Systems Engineering and Computer Science Program - COPPE/UFRJ P.O. Box 68511 21941-972 Rio de Janeiro RJ Brazil

ISBN: (纸本)9781605580302

Software technologies, such as model-based testing approaches, have specific characteristics and limitations that can affect their use in software projects. To make available knowledge regarding such technologies is important to support the decision regarding their use in software projects. In particular, a choice of model-based testing approach can influence testing success or failure. Therefore, this paper aims at describing knowledge acquired from a systematic review regarding model-based testing approaches and proposing an infrastructure towards supporting their selection for software projects. Copyright 2008 ACM.

关键词： Software testing

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Kairos: An Architecture for Securing Authorship and Temporal Information of Provenance Data in Grid-Enabled Workflow Management systems

Kairos: An Architecture for Securing Authorship and Temporal...

引用

IEEE International Conference on e-Science and Grid Computing

作者： Luiz M.R. Gadelha Jr Marta Mattoso Computer and Systems Engineering Program-COPPE Federal University of Rio de Janeiro Rio de Janeiro Brazil

Secure provenance techniques are essential in generating trustworthy provenance records, where one is interested in protecting their integrity, confidentiality, and availability. In this work, we suggest an architecture to provide protection of authorship and temporal information in grid-enabled provenance systems. It can be used in the resolution of conflicting intellectual property claims, and in the reliable chronological reconstitution of scientific experiments. We observe that some techniques from public key infrastructures can be readily applied for this purpose. We discuss the issues involved in the implementation of such architecture and describe some experiments realized with the proposed techniques.

关键词： Workflow management software Protection Data security Information security Intellectual property computer architecture Grid computing Digital signatures Distributed computing Mesh generation

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Transactional WaveCache: Towards Speculative and Out-of-Order DataFlow Execution of Memory Operations

Transactional WaveCache: Towards Speculative and Out-of-Orde...

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International Symposium on computer Architecture and High Performance Computing (SBAC-PAD)

作者： Leandro A.J. Marzulo Felipe M.G. Franca Vítor Santos Costa Systems Engineering and Computer Science Program COPPE Universidade Federal do Rio de Janeiro Brazil Departmento de Ciência de Computadores Universidade do Porto Porto Portugal

The WaveScalar is the first dataflow architecture that can efficiently provide the sequential memory semantics required by imperative languages. This work presents a speculative memory disambiguation mechanism for this architecture, the transaction WaveCache. Our mechanism maintains the execution order of memory operations within blocks of code, called waves, but adds the ability to speculatively execute, out-of-order, operations from different waves. This mechanism is inspired by progress in supporting transactional memories. Waves are considered as atomic regions and executed as nested transactions. Wave that have finished the execution of all their memory operations are committed, as soon as the previous waves are also committed. If a hazard is detected in a speculative wave, all the following waves (children) are aborted and re-executed. We evaluated the transactional WaveCache on a set of benchmarks from Spec 2000, Mediabench and Mibench (telecomm). Speedups ranging from 1.31 to 2.24 (related to the original WaveScalar) where observed when the benchmark doesn't perform lots of emulated function calls or access memory very often. Low speedups of 1.1 to slowdowns of 0.96 were observed when the opposite happens or when the memory concurrency was high.

关键词： Out of order computer architecture Parallel processing High performance computing Telecommunications Concurrent computing Hardware Data engineering systems engineering and theory computer science

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Logic as energy: A SAT-based approach

Logic as energy: A SAT-based approach

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2nd International Symposium on Brain, Vision, and Artificial Intelligence, BVAI 2007

作者： Lima, Priscila M. V. Morveli-Espinoza, M. Mariela M. França, Felipe M. G. LAM - Computer Architecture and Microelectronics Laboratory Universidade Federal Do Rio de Janeiro Brazil Departament d'Informàtica Universitat Autònoma de Barcelona Spain COPPE - Systems Engineering and Computer Science Program Universidade Federal Do Rio de Janeiro Brazil

ISBN: (纸本)3540755543

This paper presents the implementation of ARQ-PROP II, a limited-depth propositional reasoner, via the compilation of its specification into an exact formulation using the satyrus platform. satyrus' compiler takes as input the definition of a problem as a set of pseudo-Boolean constraints and produces, as output, the Energy function of a higher-order artificial neural network. This way, satisfiability of a formula can be associated to global optima. In the case of ARQ-PROP II, global optima is associated to Resolution-based refutation, in such a way that allows for simplified abduction and prediction to be unified with deduction. Besides experimental results on deduction with ARQ-PROP II, this work also corrects the mapping of satisfiability into Energy minima originally proposed by Gadi Pinkas. © 2007 Springer-Verlag Berlin Heidelberg.

关键词： Neural networks

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Architectural elements recovery and quality evaluation to assist in reference architectures specification

Architectural elements recovery and quality evaluation to as...

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19th International Conference on Software engineering and Knowledge engineering, SEKE 2007

作者： De Vasconcelos, Aline Pires Vieira Werner, Claudia Maria Lima COPPE UFRJ Systems Engineering and Computer Science Program P.O. Box 68511 Rio de Janeiro RJ Brazil CEFET Campos Federal Center for Technological Education of Campos Dr. Siqueira 273 Campos dos Goytacazes RJ Brazil

ISBN: (纸本)9781627486613

Reference architectures are the basis for application instantiation in both Domain engineering and Product Line contexts. They are created based on domain requirements, commonalities, and variability. Considering that one of the essential sources of information in this context is the existing systems available in the domain, reverse engineering becomes a key activity to assist in reference architectures specification. Although many approaches consider reengineering existing systems to help in reusable components extraction and variability identification, they do not propose an approach, with well-defined activities and criteria, to support reference architectures specification from existing systems. In this context, this paper describes an approach to help in this task covering three macro-Activities, namely: reverse engineering focusing on architectural elements recovery;recovered architecture quality evaluation;and domain commonalities and variability identification. These activities are guided by general criteria, which can be reused across domains, and are supported by a tool set integrated to a reuse based software development environment, i.e. the Odyssey environment. The results of experimental studies conducted to evaluate the first two macro-Activities are described in this paper. Copyright © (2007) by Knowledge systems Institute (KSI).

关键词： computer software reusability

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An alternative QoS architecture for the IEEE 802.16 Standard 06

An alternative QoS architecture for the IEEE 802.16 Standard

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2nd Conference on Future Networking Technologies, CoNEXT'06

作者： De Moraes, Luís Felipe M. Maciel, Paulo Ditarso Systems Engineering and Computer Science Program - COPPE/UFRJ HighSpeed Networks Laboratory RAVEL Rio de Janeiro RJ Brazil

In this paper, we propose an alternative QoS architecture for the IEEE 802.16 Standard, that incorporates a priority based packet scheduling and a new traffic shaping. For this, we present the ideas of a traffic condi... 详细信息

ISBN: (纸本)1595934561

关键词： Quality of service

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A variable priorities MAC protocol for broadband wireless access with improved channel utilization among stations

A variable priorities MAC protocol for broadband wireless ac...

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2006 International Telecommunications Symposium, ITS

作者： De Moraes, L.F.M. Maciel Jr., P.D. High-Speed Networks Laboratory - RAVEL Systems Engineering and Computer Science Program - COPPE/UFRJ Rio de Janeiro - RJ Brazil

ISBN: (纸本)8589748049

The Broadband Wireless Access (BWA) technology has been proposed to support different traffic classes with distinct quality of service (QoS) requirements in broadband metropolitan area networks. Therefore, as part of its specifications, such a system must properly address the combined requirements of wireless communications and multimedia applications. We propose in this paper an extension to the MAC protocol presented in [1, 2], by assigning variable priorities to the network stations sharing access to the communication channel. An analytical model to evaluate the performance of the proposed protocol is also developed and results obtained for the messages waiting times at different stations are presented. In addition, simulation data are used to compare the results obtained from the analytical model presented previously. It is concluded that the proposed variable priority MAC protocol is able to improve channel utilization and provide throughput and queueing delay fairness among the stations in the network. © 2006 SBrT.

关键词： Analytical models

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