A Homogeneous Set-Theoretical Frame for Clustering Fuzzy Relational Data

Our purpose is to provide a set-theoretical frame to clustering fuzzy relational data basically based on cardinality of the fuzzy subsets that represent objects and their complementaries, without applying any crisp property. From this perspective we define a family of fuzzy similarity indexes which includes a set of fuzzy indexes introduced by Tolias et al, and we analyze under which conditions it is defined a fuzzy proximity relation. Following an original idea due to S. Miyamoto we evaluate the similarity between objects and features by means the same mathematical procedure. Joining these concepts and methods we establish an algorithm to clustering fuzzy relational data. Finally, we present an example to make clear all the process

An automatic correction tool for relational database schemas

A Web-based tool developed to automatically correct relational database schemas is presented. This tool has been integrated into a more general e-learning platform and is used to reinforce teaching and learning on database courses. This platform assigns to each student a set of database problems selected from a common repository. The student has to design a relational database schema and enter it into the system through a user friendly interface specifically designed for it. The correction tool corrects the design and shows detected errors. The student has the chance to correct them and send a new solution. These steps can be repeated as many times as required until a correct solution is obtained. Currently, this system is being used in different introductory database courses at the University of Girona with very promising results

Entrepreneurship, ties and relational networks: the case of a public-private cross-border tourism product

The thesis aims to understand the processes of entrepreneurship that try to create businesses or products with a high degree of complexity. This complexity comes from the fact that these products or initiatives can only be viable with the concurrence of a large number of heterogeneous actors (public, private, from different regions, etc..) which interact in a relational context. A case with these characteristics is the Camí dels Bons Homes. The thesis analyzes the evolution of the relational network from the point of view of its structure and content of its links. The results show and explain the observed changes in the network structure and the changes in the ties content. This analysis of the content of ties contributes to a new systematization and operationalization of ties’ content. Moreover this analysis takes in account negative ties, a less discussed issue in literature.

A Liderança: uma análise sobre o clima organizacional

No quotidiano de uma organização, facilmente se constatará a influência da liderança sobre o comportamento e o clima organizacional predominantes. Assim, o presente trabalho pretende evidenciar o grau e nível que tais inter-relações poderão assumir no seio das organizações. Neste universo, e tendo sobretudo em conta as exigências da gestão organizacional contemporânea, existem várias questões suscetíveis de ser levantadas. Bastarão as competências técnicas acumuladas e adquiridas para garantir a eficácia de um líder? Por outro lado, poderá este atingir os objetivos a que a organização se propõe se não estiver provido das devidas competências relacionais? Pretende-se igualmente determinar os fatores e condicionalismos que caraterizam o líder carismático, capaz de tornar o clima organizacional favorável ao aumento da produtividade dos trabalhadores, gerir equipas, estimular a motivação, fazer uso efetivo dos recursos e desenvolver a confiança nas pessoas. Além disso, focando a dimensão do comportamento organizacional pretende-se definir o contrato psicológico, a relação líder-membro e como esta influencia os comportamentos, a motivação e o trabalho. O estudo empírico incide sobre uma escola superior: O Instituto Politécnico da Guarda. Os resultados apontam para a existência de uma relação positiva indiciando que o contrato psicológico, existente entre colaboradores e liderança das unidades orgânicas da instituição em análise, assenta no envolvimento e satisfação favorável no que respeita às relações líder-membro.

Evolution or extinction? Reflections on the future of research in educational leadership and management

Consideration of the quality, relevance and utility of research in educational leadership and management has been a growing concern of researchers, policy-makers and practitioners, but there is little agreement about its current state or priorities for development. The article reflects on the key criticisms that have been made of research in educational leadership and management in this issue, and elsewhere. It considers how we might begin to devise better ways of understanding its audiences, judging its quality and identifying priorities for the future. It argues that the research reflects its capture by those with particular interests or values, and impacts in ways which are complex and indirect. If educational leadership and management research is to be secure in its perceived value and contribution in the future, several developments are needed, including a greater emphasis on interdisciplinarity, an expansion of the range of methodologies, particularly qualtitative studies; and these shifts must be evident in training researchers as well as in the conduct of research.