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Publicações

2009

An integrated approach to the vehicle routing and container loading problems

Autores
Moura, A; Oliveira, JF;

Publicação
OR SPECTRUM

Abstract
Real-world distribution problems raise some practical considerations that usually are not considered in a realistic way in more theoretical studies. One of these considerations is related to the vehicle capacity, not only in terms of cubic meters or weight capacity but also in terms of the cargo physical arrangements. In a distribution scene, two combinatorial optimization problems, the vehicle routing problem with time windows and the container loading problem, are inherently related to each other. This work presents a framework to integrate these two problems using two different resolution methods. The first one treats the problem in a sequential approach, while the second uses a hierarchical approach. To test the quality and efficiency of the proposed approaches, some test problems were created based on the well-known Solomon, Bischoff and Ratcliff test problems. The results of the integrated approaches are presented and compared with results of the vehicle routing problem with time windows and the container loading problem applied separately.

2009

FEUP at TREC 2009 Blog Track: Temporal evidence in the faceted blog distillation task

Autores
Nunes, S; Ribeiro, C; David, G;

Publicação
NIST Special Publication

Abstract
This paper describes the participation of FEUP, from the University of Porto, in the TREC 2009 Blog Track. FEUP participated in the faceted blog distillation task with work focused on the use of temporal features available in the new TREC Blogs08 collection. The approach presented in this paper uses the temporal information available in most individual posts to amplify (or reduce) each post's score. Blog scores, and subsequent ranks, are obtained by combining individual posts' scores. While preparing the runs, no endeavors were made to identify a priori any temporal differences between the three distinct facets.

2009

A Web-Based Tool for Assessing Online Peer-Reviews

Autores
Cunha, E; Figueira, A;

Publicação
PROCEEDINGS OF THE 8TH EUROPEAN CONFERENCE ON E-LEARNING

Abstract
Self and peer-evaluation allow the development of learning environments which provide students with the means to consider upon their own (and of their colleagues) current learning skills. However, if each student in a class performs an evaluation of two of his(her) peers, which in turn will have to be assessed by the teacher/educator, then the additional work will certainly double. Hence, when considering large classes, this methodology is clearly infeasible due to the overload of work. In this article we describe a solution to provide educators with better conditions to implement self and peer-evaluation by using a web-based tool that can be coupled with general open-source learning management systems. Our tool, based on the Moodle Workshop module, features an automatic online distribution of the students' submitted assignments for peer-evaluation, and an automatic assessment of the evaluations. The criteria for evaluating student submissions can be set to meet the teacher/educator objectives as it comprises a several templates ranging from open questions graded over a topic-match table, to multiple choice questions, calculated questions, and even full text graded over sets of error-banded answer statements. The system, throughout comparison of every criteria item in the student's submitted assessment with the teacher's assessment, or with the considered best assessment by the system (depending on configuration), automatically computes a grade which reflects the quality of the student's assessment. It is also flexible enough to allow configuration of evaluation parameters as: number of criteria and topics to use as the evaluation table; weights assigned to criteria; scales used in each evaluation topic; degree of rigidness for assessment (from very lax to very strict), and the number of peers to evaluate. The configuration interface allows overlapping of activity phases (evaluation of examples from the teacher, own work submissions, peer-review, review assessment and display of results) - it is possible to have students reviewing their peers, even if not all the students in the class have already submitted their work. To present the final grades, including information from the peer-review and correspondent assessments, we created a dynamic page with sliding panes which follow a minimum information display principle: specific (student) information is accessible from the general (class) information pane with a single click. We also implemented a system of graphical 'alerts' to the teacher/evaluator for problematic situations in which manual intervention is recommended.

2009

The evaluation of the usability of an intelligent medical system: BCCT.core [A avaliação da usabilidade de um sistema médico inteligente: BCCT.core]

Autores
Afonso, AP; Cardoso, JS; Cardoso, MJ; Cota, MP;

Publicação
Actas da 4a Conferencia Iberica de Sistemas e Tecnologias de Informacao, CISTI 2009

Abstract

2009

Research on social and environmental accounting in Southern European Countries

Autores
Branco, MC; Delgado, C;

Publicação
REVISTA ESPANOLA DE FINANCIACION Y CONTABILIDAD-SPANISH JOURNAL OF FINANCE AND ACCOUNTING

Abstract
This descriptive paper explores the role of Southern European academics within social and environmental accounting (SEA) research. It is the first survey on SEA research in Southern Europe. This review specifically targeted international journals to see how much Southern European research had penetrated the international SE A academic discourse. The research that is reported in this paper is based on an electronic search of the online databases which include journals which publish SEA research. The paper reviews journal articles published in specialized journals over the period 1998 to 2008 and reaches several conclusions: 1. The volume of published research is low and quite recent; 2. Research is more or less evenly split between empirical and theoretical articles; 3. Empirical research is somewhat more qualitative in orientation, and 4. Most empirical papers focus on the countries of origin of the researchers. Hence, there is great scope for expanding the amount of research on SEA in Southern Europe, as well as improving its geographic coverage.

2009

Wind Energy Technology

Autores
Mesquita, R; Beleza, J; Maciel Barbos, FP;

Publicação
Renewable Energy

Abstract

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