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Seminário User Modelling on the Social Web: Twitter-based analysis for adaptation and personalisation
sexta-feira, 10 de agosto de 2012 às 15:22

Prof. Geert-Jan Houben,TU Delft, The Netherlands
In this talk, we discuss how micro-blogging activities on Twitter can be leveraged for user modeling and personalisation. We investigate this challenge and introduce a framework for user modeling on Twitter which enriches the semantics of Twitter messages (tweets) and identi es topics and entities (e.g. persons, events, products) mentioned in tweets. We analyse how strategies for constructing hashtag-based, entity-based or topic-based user profiles benefit from semantic enrichment and explore the temporal dynamics of those profiles. We further measure and compare the performance of the user modeling strategies in context of a personalised news recommendation system. Our results reveal how the different user modeling strategies impact personalization and discover that the consideration of temporal
profile patterns can improve recommendation quality. We also take a look at some applications that follow from this work, e.g. in the areas of crises management and culture-based adaptation. In the area of cultural differences we report on a study in which we analyse and compare user behaviour on two different microblogging platforms: (1) Sina Weibo which is the most popular microblogging service in China and (2) Twitter. We analyse more than 40 million microblogging activities and investigate microblogging behaviour from different angles. Our results reveal significant differences in the microblogging behaviour on Sina Weibo and Twitter and deliver valuable insights for multilingual and culture-aware user modelling based on microblogging data.

Local: Sala RDC511,
Data: 16/08 das 14 às 16horas



Seminário Towards Summarizing and Making Sense of the Blogosphere
sexta-feira, 10 de agosto de 2012 às 13:39

The extraction of structured information from text is a fast improving subfield of Natural Language Processing and Information Retrieval which has been re-invigorated with the ever-increasing availability of user-generated textual content on the Web. One environment which stands out as a source of invaluable information is the blogosphere–-the network of social media sites, in which individuals express and discuss opinions, facts, events, and ideas pertaining to their lives, their community, profession, or society at large. Indeed, the automatic extraction of reliable information from the blogosphere promises a viable approach for discovering very rich social data. Considerable attention has been given to studying the social dynamics among the participants (i.e., authors) in shared environments like the blogosphere. In that line of work, the goal is to understand how the network of humans communicating in the blogosphere forms and evolves over time, and how it influences participants in the process. Our goal, on the other hand, is to extract the network of entities, facts, ideas and opinions expressed in social media sites, as well as the relationships among them. Such structured data can be organized as one or more information networks, which in turn are powerful metaphors for the study and visualization of the conversations in the blogosphere. In this talk, I will cover the work on extracting and linking entities and relations among entities in the context of our ongoing SONEX project, which is an open relation extraction system based on a combination of text clustering and other unsupervised methods. I will also cover a large-scale experimental evaluation of open relation extraction which reveals a lot of room for improvement in the area.

Denilson Barbosa, U. of Alberta, Canada
Local: RDC511
Data : 15/8, 4ª feira das 16-18hs



Dissertação de Mestrado: Uma Abordagem Automática e Multilíngue para Construção de Extratores de Relações a um Baixo Custo
terça-feira, 7 de agosto de 2012 às 08:44

Candidato : THIAGO RIBEIRO NUNES

Orientador: DANIEL SCHWABE

Data e Hora: 09/08/2012 às 10:00

Local:  RDC511



Defesa de Tese: Modelagem de Testes de Software e Aplicação de Agentes que Realizam Auto-Teste
terça-feira, 7 de agosto de 2012 às 08:39

Candidato : ANDREW DINIZ DA COSTA

Orientador : CARLOS JOSE PEREIRA DE LUCENA

Data e Hora:  10/08/2012 às 13:00

Local :  FPLF 13º andar



Defesa de Tese:Proximity-based Understanding of Conditionals
sexta-feira, 3 de agosto de 2012 às 11:01

Candidato:Ricardo Queiroz de Araujo Fernandes
Orientador:Edward Hermann Haeusler
Data e Hora:10/08/12 às 10h
Local: RDC511



Horário Graduação 2012.2
quinta-feira, 2 de agosto de 2012 às 14:10

Defesa de Dissertação: Modelagem da calçada de Copacabana
quarta-feira, 1 de agosto de 2012 às 08:39

Candidato:   TATIANA WAINTRAUB

Orientador:   Waldemar Celes

Data e Hora:  06/08/2012 às 14:00

Local:  RDC511



Resultados da Seleção para Pós-Graduação em 2012.2
sexta-feira, 20 de julho de 2012 às 14:10

Prêmio SBC de Mérito Científico em 2012 concedido ao Prof. Marco Antonio Casanova
quarta-feira, 18 de julho de 2012 às 21:18
O Prêmio SBC de Mérito Científico em 2012 foi concedido ao professor Marco Antonio Casanova (PUC-Rio), que agradeceu ao professor Antonio Luz Furtado (PUC-Rio), seu parceiro em muitos trabalhos científicos. “Para nós não importava quem seria o autor e o co-autor, os trabalhos sempre foram feitos de forma colaborativa”, ressaltou Casanova. Esse prêmio é destinado a sócios efetivos ou fundadores da SBC que tenham reconhecida contribuição científica e/ou técnica em uma das várias áreas da Computação contempladas pela Sociedade.

Leia a notícia no site da SBC.