This PhD research aims to integrate group decision making into a personality based recommender systems in a domain with complex and emotional products i.e., e-tourism domain. In this domain, decisions, especially in groups, are often non rational. Based on the ongoing research on picture-based recommender systems at the e-commerce group, TU Wien and the software of Pixtri OG, the research will develop new methods to model group recommendations and support emotion-aware group decision processes, based on and evaluated by a world-wide study.

Introduction: The objective of the present study was to evaluate the antimicrobial and cytotoxic activities of water extracts of leaves and barks from Alnus glutinosa (L.) Gaertn., A. incana (L.) Moench, and A. viridis (Chaix) DC.Methods: The antimicrobial activities of extracts were tested against gram-negative and gram-positive bacteria as well as yeast strains by the agar diffusion method. The cell viability was determined by the Trypan blue dye exclusion method.Results: The largest diameters of inhibition zone (DIZ) were recorded with Staphylococcus aureus ATCC 6538 and Bacillus subtilis 168M. The highest percentage of cell viability was observed with water bark extracts of A. glutinosa (97.46%).Conclusions: Potential antimicrobial properties of A. glutinosa, A. incana, and A. viridis demonstrated in this study, as well as their low levels of toxicity, make them an interesting subject for further studies.

Neste artigo proponho uma reflexao sobre o aprendizado da Sociologia no Ensino Medio, tendo a linguagem questao central. Considero alguns aspectos da dimensao linguistica do ensino e procuro caracterizar a linguagem sociologica e suas relacoes com o desenvolvimento do olhar sociologico. Recorro as contribuicoes de Wittgenstein e Vigotski sobre as relacoes entre pensamento, linguagem e conhecimento, pois apesar de apresentarem concepcoes de linguagem distintas, e em alguma medida conflitantes, e possivel aproximar as implicacoes que essas duas perspectivas tem para compreender o processo de apropriacao da linguagem sociologica.