Examples in relational algebra

Some examples from the book. Connolly, T. M. and C. E. Begg (2005). Database systems : a practical approach to design, implementation, and management. Harlow, Essex, England ; New York, Addison-Wesley.

Evidence versus ideology in education policy : the recent history of initial teacher education in England and Wales and the implications for educational researchers as agents of change.

Resumen del autor. Este art??culo pertenece al monogr??fico 'John Elliott: su pensamiento y su influencia'

Family education and family therapy : tools for relational change.

Resumen tomado del autor

Constructivism and ideology : lessons from the Spanish curriculum reform of the 1980s. 'Constructivismo e ideología: lecciones de la reforma curricular española en los ochenta'.

Monográfico con el título: 'Mejorar la escuela: perspectivas didácticas y organizativas'. Resumen basado en el de la publicación

Application of a relational frame theory account of psychological flexibility in young children

Resumen tomado de la publicaci??n

The effect of relational training on intelligence quotient : a case study

Resumen tomado de la publicaci??n

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.

The influence of ideology on the translation of Mao Zedong’s poems

Mao Zedong’s poems hold an important place in the history of Chinese literature. From the perspective of manipulation theory, the paper aims at exploring the influences that ideology exerted on the translation of Mao Zedong’s poems. These influences have manifested themselves mainly in such aspects as the organizing of translation activity, the selection of source texts, the comprehension of the texts and the freedom translators enjoy to render the poems.