Comparison of Fuzzy Integral-Fuzzy Measure based Ensemble Algorithms with the State-of-the-art Ensemble Algorithms

The Fuzzy Integral (FI) is a non-linear aggregation operator which enables the fusion of information from multiple sources in respect to a Fuzzy Measure (FM) which captures the worth of both the individual sources and all their possible combinations. Based on the expected potential of non-linear aggregation offered by the FI, its application to decision-level fusion in ensemble classifiers, i.e. to fuse multiple classifiers outputs towards one superior decision level output, has recently been explored. A key example of such a FI-FM ensemble classification method is the Decision-level Fuzzy Integral Multiple Kernel Learning (DeFIMKL) algorithm, which aggregates the outputs of kernel based classifiers through the use of the Choquet FI with respect to a FM learned through a regularised quadratic programming approach. While the approach has been validated against a number of classifiers based on multiple kernel learning, it has thus far not been compared to the state-of-the-art in ensemble classification. Thus, this paper puts forward a detailed comparison of FI-FM based ensemble methods, specifically the DeFIMKL algorithm, with state-of-the art ensemble methods including Adaboost, Bagging, Random Forest and Majority Voting over 20 public datasets from the UCI machine learning repository. The results on the selected datasets suggest that the FI based ensemble classifier performs both well and efficiently, indicating that it is a viable alternative when selecting ensemble classifiers and indicating that the non-linear fusion of decision level outputs offered by the FI provides expected potential and warrants further study

Contemporaneidade, educação e tecnologia Contemporaneity, education and technology

O texto aborda o papel das tecnologias da comunicação e da informação na educação hoje. Questiona esse papel, discute o que deve ser compreendido por qualidade na educação, assim como examina a concepção de uma formação, a ser construída nos cursos que preparam professores e gestores, capaz de imprimir (uma outra) qualidade à educação e de contribuir para que o uso dos recursos tecnológicos facilite a discussão da cultura e se coloque a favor de um projeto de emancipação. Argumenta que uma educação de qualidade demanda, entre outros elementos, tanto uma visão crítica dos processos escolares quanto usos apropriados e criteriosos das novas tecnologias.<br>This paper focuses on the role of technologies in education today. It questions this role, discusses what has to be understood as quality in education and examines the conception of a teachers and administrators' training course capable of offering (another) quality to education and of contributing to a use of technological resources that promotes the discussion of culture and favors an emancipation project. It argues that quality in education requires, among other elements, both a critical view of school processes and appropriate and criterious uses of the new technologies