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The Single Vehicle Routing Problem with Deliveries and Selective Pickups in a CPU-GPU Heterogeneous Environment

The Single Vehicle Routing Problem with Deliveries and Selec...

引用

IEEE International Conference on High Performance Computing and Communications (HPCC)

作者： Igor Machado Coelho Luiz Satoru Ochi Pablo Luiz Araújo Munhoz Marcone Jamilson Freitas Souza Ricardo Farias Cristiana Bentes Institute of Computing Fluminense Federal University UFF Niteroi Brazil Department of Computer Science UFOP-Federal University of Ouro Preto and FEAD Ouro Preto Brazil System Engineering Program-COPPE Federal University of Rio de Janeiro Rio de Janeiro Brazil Department of System Engineering State University of Rio de Janeiro Rio de Janeiro Brazil

In this work, we propose a new algorithm to solve a variant of the Vehicle Routing Problem that is the Single Vehicle Routing Problem with Deliveries and Selective Pickups (SVRPDSP). Our algorithm produces good quality solutions that are better than the best known solutions in the literature. In order to reduce the time spent to solve large-sized instances, we also propose here a parallel implementation of our algorithm that explores a heterogeneous environment composed of a CPU and a GPU. Therefore, our algorithm harnesses the tremendous computing power of the GPU to improve the performance of the local searches computation. We obtained average speedups from 2.73 to 16.23 times with our parallel approach.

关键词： Graphics processing unit Vehicles Parallel algorithms Vectors Resource management Optimization Routing

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Making the comprehension of software architecture attractive

Making the comprehension of software architecture attractive

引用

Conference on Software engineering Education & Training (CSEE&T)

作者： Claudia Susie C. Rodrigues Cláudia M. L. Werner System Engineering Computer Science COPPE UFRJ Brazil

ISBN: (纸本)9781457703492

Visualization stimulates the cognitive capacity of humans and facilitates the understanding of a subject. It performs a crucial role in teaching software architecture. As systems become more complex, new education proposals have been introduced in the classroom, especially those that make teaching more attractive to students. This paper presents the VisAr3D approach which was designed to provide a 3D visualization of UML models, where the user should intuitively understand architectural elements in this 3D environment. It includes exploration, interaction and simulation resources to establish a practical and pleasant learning activity, focusing in large scale systems.

关键词： Unified modeling language Three dimensional displays Visualization Software architecture Education Solid modeling computer architecture

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Behavioral aspects of information technology negotiators

Behavioral aspects of information technology negotiators

引用

2011 IEEE International Conference on systems, Man, and Cybernetics, SMC 2011

作者： Assis Rodrigues, Sergio Moreira De Souza, Jano COPPE/UFRJ - Computer Science Department Graduate School of Engineering Federal University of Rio de Janeiro Rio de Janeiro Brazil

ISBN: (纸本)9781457706523

It has been known that Information Technology (IT) area has increasingly demanded more professionals over the years. In Brazil this reality is even more evident - this emerging and large country, the expanded search for IT professionals still faces difficulty in finding skilled labor. Moreover, this difficulty is accentuated during the definition of teams, due to the diversity of expertise of each professional. In this direction, this article focuses on how to discover and manage cognitive and behavioral aspects of IT professionals. Based on psychological questionnaires and negotiation games, this work aims at analyzing types of behavior (logically reasoning people, creative people, communicative people and organized people), aspects of collaborative and competitive issues elucidates how the predominance of a specific stereotype can influence negotiations among IT people. The results were obtained in a Brazilian context, involving technical and management staff, with IT people and non-IT people. © 2011 IEEE.

关键词： Surveys

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Integrating web and mobile knowledge management tools to improve negotiations

Integrating web and mobile knowledge management tools to imp...

引用

2011 IEEE International Conference on systems, Man, and Cybernetics, SMC 2011

作者： Assis Rodrigues, Sergio Santos Silva, Tiago Pivotto, Carlos Girao, Allan Moreira De Souza, Jano Rocha, Evandro COPPE/UFRJ - Computer Science Department Graduate School of Engineering Federal University of Rio de Janeiro Rio de Janeiro Brazil

ISBN: (纸本)9781457706523

One of the most essential problems during negotiations is to know what people aim to claim. Although it sounds strange, most professionals go into the negotiation table without enough preparation. Regarding preparation it is important to understand that this is the stage when professionals have to anticipate the counterpart's interests, alternatives, concessions and possible changes in strategy. Experienced negotiators usually keep in their mind the whole negotiation and, most of the time, they still have personal notes about the deal. Indeed, people have memory limits and this may disrupt even the cleverest ones. Therefore, Negotiation Support systems can help to store this information and also manipulate it in the future. In this direction, this work presents an environment focused on a negotiation preparation step, mainly considering knowledge management and mobile technologies. The article shows how these concepts may carry out the preparation stage, advantages to use it and available reports. Besides, some experiments and results will be also addressed in this work. © 2011 IEEE.

关键词： Knowledge management

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How IT professionals face negotiations

How IT professionals face negotiations

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SEKE 2011 - Proceedings of the 23rd International Conference on Software engineering and Knowledge engineering

作者： Rodrigues, Sergio Assis De Souza, Jano Moreira COPPE/UFRJ - Computer Science Department Graduate School of Engineering Federal University of Rio de Janeiro Rio de Janeiro Brazil

ISBN: (纸本)1891706292

Despite the fact that people frequently see software development as a commodity, decision-making processes in Information Technology (IT) projects usually require great effort in solving several types of conflicts. The main tool to solve such conflicts is negotiation, which requires strategies and personal skills. Preparation step is the cornerstone to lead successful deals, but one of the major issues faced by negotiators, especially beginners, is to find out when they are emotionally prepared. Regarding behavioral aspects, there are particularities in IT people's conduction, once they are more reasoning than other professionals. Thus, this work aims at presenting a research about how IT professionals face IT project's negotiations. The research was managed in Brazilian professionals and evaluated IT people's performance through psychological tests, behavioral simulations and negotiation games to set negotiator skills profile. In addition, some case studies and simulation results are presented. This exploration is important as a way to show possible characteristics of style and dominant skills used by IT people during software development deals. This study works as a fundamental starting point to realize the requirements to develop specific negotiation support systems to IT context.

关键词： Software design

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A Web Tool to analyse negotiation behavior

A Web Tool to analyse negotiation behavior

引用

FTRA International Conference on Multimedia and Ubiquitous engineering

作者： Rodrigues, Sergio Assis De Souza, Jano Moreira COPPE/UFRJ - Computer Science Department Graduate School of Engineering Federal University of Rio de Janeiro Rio de Janeiro Brazil

ISBN: (纸本)9780769544700

Decision-making processes in any context usually require great effort in solving regular conflicts. One approach to handle conflicts is through negotiation, which requires a wide range of strategies and personal skills. Moreover, during crisis periods, enterprises tend to downsize and the remaining professionals have to improve their negotiation aptitudes in order to maintain the organization alive. Experienced negotiators assert that the preparation stage is vital to achieve successful deals, but one of the major issues faced by negotiators, especially beginners, is to realize when they are technically and emotionally ready. Regarding the psychological side, sometimes it is difficult to measure how professionals behave when initiating negotiation modeling. Under this scenario, a Web Tool has been designed to support professionals to find out their levels of proficiency and behavior trends while negotiating. Therefore, this paper aims at presenting features of this environment, which combines psychological tests, behavioral simulations and negotiation games to set the negotiator skills profile. In addition, some studies and results are presented. © 2011 IEEE.

关键词： Decision making

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A roadmap to the Collaboration Maturity Model (CollabMM) evolution

A roadmap to the Collaboration Maturity Model (CollabMM) evo...

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International Conference on computer Supported Cooperative Work in Design

作者： Magdaleno, Andréa Magalhães Araujo, Renata Mendes De Werner, Cláudia Maria Lima System Engineering and Computer Science Program - COPPE/UFRJ Rio de Janeiro RJ Brazil PPGI - Graduate Program in Informatics - UNIRIO Rio de Janeiro RJ Brazil

ISBN: (纸本)9781457703874

Organizations have been relying on collaboration for productivity improvement and knowledge sharing. The first step to foster collaboration in organizations is to make it explicit. With this aim, the Collaboration Maturity Model (CollabMM) was proposed and evaluated. The lessons learned during model applications in previous work pointed out the need to review both the model and its evaluation instruments. A literature review also showed some improvement opportunities. Therefore, the objective of this work is to develop a roadmap to highlight the main opportunities of evolution in CollabMM. These opportunities will compose our research agenda in this topic and guide future work. © 2011 IEEE.

关键词： Productivity

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Knowledge representation of Brazilian Official Gazettes for chronological recovery of laws

Knowledge representation of Brazilian Official Gazettes for ...

引用

IADIS International Conference WWW/Internet 2011, ICWI 2011

作者： Brandao, Stainam Silva, Tiago Rodrigues, Sergio Araujo, Luis Silva, Daniel Souza, Jano M. COPPE/UFRJ - Computer Science Department Graduate School of Engineering Federal University of Rio de Janeiro Brazil Brazilian Department of the Treasury Brasilia Brazil DCC-IM/UFRJ - Computer Science Department Mathematics Institute Federal University of Rio de Janeiro Brazil

ISBN: (纸本)9789898533012

Federal Government publishes laws and decrees daily. However, a simple search can return inconsistent information about this document, when its status has been changed later in another document through a government act like publication, grinding, re-publication, cancellation and amendment. The goal of this paper is to present the solution adopted by the Federal Budget Secretary responsible for monitoring decrees, legislation, jurisprudence and administrative actions related to federal budget control. Thus, the knowledge represented treat the lifecycle of this type of documents by adding properties such as signature date, signing authority and role of authority at time of signature, providing chronological and semantic processing on the search for document types. The RDF conceptual model for knowledge representation was adopted, since it is a standard for open data from federal government on the Web to facilitate citizen access to information, thus fulfilling the constitutional provision that defines the citizen as the holder of the access right to information. On the Case Study performed was necessary to crawl and mining Brazilian Official Gazette for documents identification of Federal Budget domain and the subsequent extraction of knowledge about the transformations undergone by each decree. © 2011 IADIS.

关键词： Knowledge representation

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A proposal for software ecosystems engineering

A proposal for software ecosystems engineering

引用

3rd International Workshop on Software Ecosystems 2011, IWSECO 2011

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

Software Ecosystems (SECOs) have emerged as an approach to improve software reuse in industry considering relations among companies and stakeholders. Companies and organizations have opened up their platforms and artifacts to others, including partners and third-part developers around the world. This changes the traditional software industry because it requires mature research in software architecture, component-based software engineering and software product line in a market and business environment. In this sense, this paper presents an initial proposal for SECOs engineering in order to outline a set of steps that combines three different dimensions of SECOs and joins different perspectives in SECOs research literature through a survey. In this paper, the focus is on the first dimension, that is, architecture. A preliminary analysis done by the Brazilian Software Reuse Lab's SECOs at coppe/ufrj points out that several concepts presented at IWSECO 2009 and IWSECO 2010 can be connected in a broader SE approach.

关键词： computer software reusability

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A collaborative approach to build evaluated web page datasets

A collaborative approach to build evaluated web page dataset...

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作者： Barros, Ricardo Rodrigues Nt., José A. Xexéo, Geraldo B. De Souza, Jano M. COPPE Graduate School of Engineering UFRJ-Federal University of Rio de Janeiro Caixa Postal: 68511 CEP: 21941-972 Rio de Janeiro Brazil Computer Science Department Institute of Mathematics UFRJ-Federal University of Rio de Janeiro Caixa Postal: 68511 CEP: 21941-972 Rio de Janeiro Brazil

Information retrieval algorithms demand datasets to assess their effectiveness. However, access to such datasets is often difficult and expensive, since building them is a time-consuming and costly task. This work presents a collaborative approach to dataset creation that uses a data quality evaluation technique based on fuzzy theory, to assist users in selecting suitable web documents for their datasets. These documents are automatically captured by a crawler and evaluated on information derived from their metadata. © 2010 Elsevier B. V. All rights reserved.

关键词： Information retrieval

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