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Seminários do Departamento de InformáticaDa Engenharia Informática e Tecnologias da Informação na Universidade de Lisboa, Faculdade de Ciências
Com a duração de uma hora, os seminários têm lugar no departamento e estão abertos à participação de todos os interessados. Os temas abordados cobrem um espectro amplo de assuntos de âmbito técnico-científico, epistemológico e pedagógico relativos à Informática e a disciplinas científicas confluentes, assim como a áreas inter- e multi-disciplinares emergentes dessa confluência.
2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996 Universal Accessibility to Ubiquitous Services
10h00, Room 1.3.14
Ubiquitous computing offers stimulating chances to assist people with disabilities and elderly people in developing everyday activities at home. Smart environments aim to support people providing them with advice for their tasks and security warnings when safety issues may arise. This support is by nature context-aware and requires user location. In order to adapt the interface to the specific characteristics of the users, the system maintains diverse models, such as user, task and context models, which are usually built by means of ontologies. So far most of the assistive intelligent environments are designed for homes and residences, where users are well modeled. But the rising ob ubiquitous computing allows extending them to out-of-home spaces. In this way people may obtain support to access services supported by ubiquitous computing, such as information kiosks, ATMs, vending machines, etc. Since the use of out-of-home services is sporadic the system cannot maintain a detailed user model. For this reason the adaptation may be less suitable. Therefore schemes to extend and share user models among the diverse providers of ubiquitous services are required. This may include some standardization of common data structures and vocabularies. On the other hand, universal accessibility also requires hardware and software interoperability. The deployment of ubiquitous services is still nascent. This allows policy makers to discuss their accessibility by people with the restrictions and to plan their development in order to prevent the proliferation of accessible technology. In this talk these issues will be presented and the basic requirements will be discussed.
Development of the Bing search engine at the Microsoft Language Development Center
José Santos MLDC, Microsoft Portugal
11h00, room 6.3.38
In the context of the QREN World Search project, the Microsoft Language Development Center has been collaborating with the Munich Search Technology center to improve the query understanding module of the Bing search engine. In this talk we will start by providing an overview of the main components of a search engine and then focus our attention on the development of the query understanding module of Bing for Portuguese. The query understanding module of a search engine is responsible for generating alterations for words in a query so that the altered query may match a broader set of documents and thus increase the likelihood of matching the most relevant documents. For instance, the query 'michael songs' could be rewritten to 'michael jackson musics', which is likely to improve the relevance of the results. In the talk we will describe the engineering process and do an analysis of the relevance improvements, as measured by NDCG and other objective metrics, on live traffic.
José Santos is currently a post-doctoral fellow at the Microsoft Language Development Center where he has been working on improving Bing's query rewriting mechanisms. José holds a Ph.D. degree in Computer Science (2010) from Imperial College London. In the Ph.D., José worked on the theory and implementation of Inductive Logic Programming (ILP) systems, a first-order logic form of Machine Learning. José also holds a Licenciatura in Informatics Engineering (2004 FCT-UNL), an MSc in Artificial Intelligence (2006 FCT-UNL) and an MSc in BioInformatics (2007 Imperial College). After graduating in 2004 José did a summer internship at Microsoft Redmond and worked one year as a consultant at Novabase Business Intelligence.
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