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A Systematic Review of Cross- vs. Within-Company Cost Estimation Studies 10

A Systematic Review of Cross- vs. Within-Company Cost Estima...

引用

10th International Conference on Evaluation and Assessment in Software engineering, EASE 2006

作者： Kitchenham, Barbara Mendes, Emilia Travassos, Guilherme H. Department of Computer Science Keele University StaffordshireST5 5GB United Kingdom National ICT Australia Locked Bag 9013 AlexandriaNSW1435 Australia Computer Science Department The University of Auckland Private Bag 92019 Auckland New Zealand UFRJ/COPPE Systems Engineering and Computer Science Program Caixa Postal 68511 RJ Rio de Janeiro21941-972 Brazil

OBJECTIVE – The objective of this paper is to determine under what circumstances individual organisations would be able to rely on cross-company based estimation models. METHOD – We performed a systematic review of studies that compared predictions from cross-company models with predictions from within-company models based on analysis of project data. RESULTS – Ten papers compared cross-company and within-company estimation models, however, only seven of the papers presented independent results. Of those seven, three found that cross-company models were as good as within-company models, four found cross-company models were significantly worse than within-company models. Experimental procedures used by the studies differed making it impossible to undertake formal meta-analysis of the results. The main trend distinguishing study results was that studies with small single company data sets (i.e. © EASE *** rights reserved.

关键词： Cost estimating

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Variability modeling in a Component-based Domain engineering Process

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9th International Conference on Software Reuse, ICSR 2006

作者： Blois, Ana Paula Terra Bacelo De Oliveira, Regiane Felipe Maia, Natanael Werner, Cláudia Becker, Karin Federal University of Rio de Janeiro COPPE/UFRJ System Engineering and Computer Science Program P.O. Box 68511 21945-970 - Rio de Janeiro - RJ Brazil PUCRS Catholic University of Rio Grande do Sul Prédio 30 - Bloco 4 90619-900 - Porto Alegre - RS Brazil

ISBN: (纸本)3540346066

Domain engineering (DE) and Component-based Development (CBD) are approaches that focus on reuse. On the one hand, DE methods emphasize variability modeling in analysis phase. On the other hand, most CBD methods gude on the development of components, with a minor focus on reusability properties. This paper presents an approach to support variability modeling, in a Component-based Domain engineering Process. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Software engineering

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Analysis and evaluation of a new MAC protocol for broadband wireless access

Analysis and evaluation of a new MAC protocol for broadband ...

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2005 International Conference on Wireless Networks, Communications and Mobile Computing

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)0780393058

Broadband Wireless Access (BWA) systems offer a solution for broadband access and high data rate transmission of multimedia services with distinct Quality-of-Service (QoS) requirements through a wireless medium. IEEE 802.16 Standard specifies the PHY and MAC layers for BWA systems. However, in spite of including the possibility for QoS support, the standard does not define how to schedule different types of traffic. This article propose a new MAC protocol for BWA systems that incorporates a traffic scheduling mechanism based on messages and/or stations priorities. An analytical model to evaluate the performance of the proposed protocol is also developed and results obtained for the messages waiting times of different traffic classes are presented. © 2005 IEEE.

关键词： Network protocols

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Odyssey-VCS: A flexible version control system for UML model elements 05

Odyssey-VCS: A flexible version control system for UML model...

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12th International Workshop on Software Configuration Management, SCM 2005

作者： Oliveira, Hamilton Murta, Leonardo Werner, Cláudia COPPE/UFRJ - Systems Engineering and Computer Science Program Federal University of Rio de Janeiro P.O. Box 68511 21945-970 Rio de Janeiro Brazil

ISBN: (纸本)1595933107

Many current version control systems use a simple data model that is barely sufficient to manipulate source-code. This simple data model is not sufficient to provide versioning capabilities for software modeling environments, which are strongly focused on analysis and architectural design artifacts. In this work, we introduce a flexible version control system for UML model elements. This version control system, named Odyssey-VCS, deals with the complex data model used by UML-based CASE tools. Moreover, it allows the configuration of both the unit of versioning and unit of comparison for each specific project, respecting the different needs of the diverse development scenarios. Copyright © 2005 ACM.

关键词： Information management

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Analysis and evaluation of a new MAC protocol for broadband wireless access

Analysis and evaluation of a new MAC protocol for broadband ...

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International Conference on Wireless Networks, Communications and Mobile Computing

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

Broadband wireless access (BWA) systems offer a solution for broadband access and high data rate transmission of multimedia services with distinct quality-of-service (QoS) requirements through a wireless medium, IEEE 802.16 standard specifies the PHY and MAC layers for BWA systems. However, in spite of including the possibility for QoS support, the standard does not define how to schedule different types of traffic. This article propose a new MAC protocol for BWA systems that incorporates a traffic scheduling mechanism based on messages and/or stations priorities. An analytical model to evaluate the performance of the proposed protocol is also developed and results obtained for the messages waiting times of different traffic classes are presented.

关键词： Media Access Protocol Wireless application protocol Access protocols Traffic control Physical layer Proposals Quality of service Analytical models Scheduling Access control

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Towards a components grouping technique within a domain engineering process

Towards a components grouping technique within a domain engi...

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31st EUROMICRO Conference on Software engineering and Advanced Applications, EUROMICRO-SEAA 2005

作者： Blois, Ana Paula T. B. Werner, Cláudia M. L. Becker, Karin Federal University of Rio de Janeiro COPPE/UFRJ System Engineering and Computer Science Program P.O. Box 68511 21945-970 - Rio de Janeiro - RJ Brazil Catholic University of Rio Grande do Sul PPGCC/PUCRS Computer Science Graduate Program Predio 30 - Bloco 4 90619-900 - Porto Alegre - RS Brazil

ISBN: (纸本)0769524311

Many components are usually created within a Domain engineering (DE) process. These components may exchange a great number of messages among them, and many times this interaction occurs within a specific group of components. The more messages the components exchange, the more complex the domain architecture becomes, thus compromising its understandability, maintainability and ultimately its reusability. This paper presents some elements of a components grouping technique that aims to identify and propose solutions to components coupling problems. This technique is being proposed within a domain engineering process called CBD-Arch-DE focused on component-based architectural design. © 2005 IEEE.

关键词： computer aided software engineering

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Scientific models management in computational grids

Scientific models management in computational grids

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17th International Conference Scientific and Statistical Database Management, SSDBM 2005

作者： De Brito, Halisson Matos Strauch, Julia De Souza, Jano Moreira Osthoff, Carla COPPE/UFRJ Systems Engineering and Computer Science Program Federal University of Rio de Janeiro PO Box 68511 ZIP Code: 21945-970 Rio de Janeiro RJ Brazil ENCE /IBGE National School of Statistical Sciences 106 S. 401 ZIP Code: 20231-050 R. André Cavalcanti Rio de Janeiro RJ Brazil LNCC National Laboratory for Scientific Computing Av. Getulio 333 Quitandinha Vargas Petrópolis RJ Brazil IM/UFRJ Institute of Mathematics Federal University of Rio de Janeiro PO Box 68511 ZIP Code: 21945-970 Rio de Janeiro RJ Brazil

This paper presents MODENA, an architecture for scientific models management using Computational Grid platform. This architecture is comprised of two systems: ModManager and ModRunner. ModManager deals with knowledge management about scientific models, acting as a scientific models library allowing for cataloguing, searching, reutilization and generation of new models. To achieve this, a metamodel is proposed to classify models, in order to support the organization, searching and retrieving of models. ModRunner manages the execution of models in a Grid environment allowing for model composition to generate a scientific Grid Workflow to be executed by distributed services offered by Grid Services. An initial prototype of ModManager is presented.

关键词： Knowledge management

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A computational framework for supporting software inspections 04

A computational framework for supporting software inspection...

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IEEE International Conference on Automated Software engineering (ASE)

作者： M. Kalinowski G.H. Travassos Systems Engineering and Computer Science COPPE/UFRJ Brazil

ISBN: (纸本)9780769521312

Software inspections improve software quality by the analysis of software artifacts, detecting their defects for removal before these artifacts are delivered to the following software life cycle activities. Some knowledge regarding software inspections have been acquired by empirical studies. However, we found no indication that computational support for the whole software inspection process using appropriately such knowledge is available. This paper describes a computational framework whose requirements set was derived from knowledge acquired by empirical studies to support software inspections. To evaluate the feasibility of such framework, two studies have been accomplished: one case study, which has shown the feasibility of using the framework to support inspections, and an experimental study that evaluated the supported software inspection planning activity. Preliminary results of this experimental study suggested that unexperienced subjects are able to plan inspections with higher defect detection effectiveness, and in less time, when using this computational framework.

关键词： Inspection Software quality Proposals systems engineering and theory computer science Costs Decision making Software performance Processor scheduling Guidelines

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Cooperation for Creativity in Design

Cooperation for Creativity in Design

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The 8th International Conference on computer Supported Cooperative Work in Design(第八届计算机支持的协同工作设计国际会议)(CSCWD2004)

作者： Adriana Vivacqua Jano de Souza COPPE-Graduate School of Engineering Computer Science Program COPPE-Graduate School of Engineering Computer Science Program DCC/IM-Institute of Mathematics UFRJ-F

Creativity has become an important asset in today'sfast changing environment. It is especially important indesign, which demands innovative solutions for *** believe that creativity can and should beencouraged in work groups. In this paper, we proposea framework for supporting creativity in problemsolving. Through the use of problem, domain and usermodels and information retrieval and agent technology,we hope to support creative cooperative work.

关键词： Collaborative work computer science Mathematics Problem-solving Information retrieval Knowledge management Environmental economics Organizing Product design Writing

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WebComposer: a tool for the composition and execution of Web service-based workflows

WebComposer: a tool for the composition and execution of Web...

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Proceedings of the Latin American Web Congress (LA-Web)

作者： L.A.G. da Costa P.F. Pires M. Mattoso COPPE-Systems Engineering and Computer Science Program Federal University of Rio de Janeiro Rio de Janeiro Brazil DCC-IM/NCE Federal University of Rio de Janeiro Rio de Janeiro Brazil

We present the WebComposer tool for the automatic composition and execution of Web service-based workflows. We use ontologies to describe and browse workflows. We associate messages and operations with workflow domain concepts using WSDL extensibility. The automatic workflow implementation through WebComposer enables the full separation of the workflow logic and the implementation technology. WebComposer provides the execution of ad-hoc programs by users and the automatic maintenance of these programs, as the available Web services are altered.

关键词： Web services Ontologies Software agents Automatic logic units Semantic Web systems engineering and theory computer science Web sites Information resources Application software

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