Talk by Pascal Felber

13 janeiro 2015, 13:28 - Lucília Abreu

Terá lugar no próximo dia 22 de janeiro de 2015, pelas 10h, no anfiteatro EA1 (Torre Norte), a palestra intitulada "Privacy-Preserving Event Stream Processing in the Cloud" apresentada pelo Prof. Pascal Felber da Université de Neuchâtel, Institut d'informatique.

Abstract

Stream processing provides an appealing paradigm for building large-scale distributed applications. Such applications are often deployed over multiple administrative domains, some of which may not be trusted. Recent attacks in public clouds indicate that a major concern in untrusted domains is the enforcement of privacy. In this talk we will primarily focus on the problem of content-based routing (CBR), which is at the core of many event stream processing systems. By routing data based on subscriptions evaluated on the content of publications, CBR systems can expose critical information to unauthorized parties. Information leakage can be avoided by the means of privacy-preserving filtering, which is supported by several mechanisms for encrypted matching. Unfortunately, existing approaches have in common a high performance overhead and the difficulty to use classical optimization. We will present and discuss mechanisms that greatly reduces the cost of supporting privacy-preserving filtering based on encrypted matching operators.

Bio

Pascal Felber received his M.Sc. and Ph.D. degrees in Computer Science from the Swiss Federal Institute of Technology. From 1998 to 2002, he has worked at Oracle Corporation and Bell-Labs (Lucent Technologies) in the USA. From 2002 to 2004, he has been an Assistant Professor at Institut EURECOM in France. Since October 2004, he is a Professor of Computer Science at the University of Neuchâtel, Switzerland, working in the field of dependable and distributed systems. He has published over 100 research papers in various journals and conferences.

More information available here here http://www.inesc-id.pt/lectures.php

Técnico vai captar talentos em Informática

7 janeiro 2015, 10:10 - Lucília Abreu

No dia 10 de janeiro de 2015 inicia no Instituto Superior Técnico, no Pavilhão de Informática I, sessões de cativação de jovens do 8º ao 11º ano de escolaridade para cursos de Informática. Trata-se de uma iniciativa CoderDojo inscrições no IST promovida por um grupo de alunos do MEIC sob orientação do Prof. Miguel Mira da Silva. As sessões ocorrerão no primeiro sábado de cada mês. Ver noticia aqui

Talk by Hanan Samet

29 dezembro 2014, 18:13 - Maria de Lurdes Piado Farrusco

Terá lugar no próximo dia 8 de Janeiro de 2015, às 11h30, na sala 336 da Rua Alves Redol, 9, uma Palestra proferida pelo Prof. Dr. Hanan Samet, da University of Maryland, Department of Computer Science.

Abstract
NewsStand is an example application of a general framework to enable people to search for information using a map query interface, where the information results from monitoring the output of over 10,000 RSS news sources and  is available for retrieval within minutes of publication.  The advantage of doing so is that a map, coupled with an ability to vary the zoom level at which it is viewed, provides an inherent granularity to the search process that facilitates an approximate search. This distinguishes it from today's prevalent keyword-based conventional search methods that provide a very limited facility for approximate searches and which are realized primarily by permitting a match via use of a subset of the keywords.  However, it is often the case that users do not have a firm grasp of which keyword to use, and thus would welcome the search to also take synonyms into account.  For queries to spatially-referenced data, the map query interface is a step in this direction as the act of pointing at a location (e.g., by the appropriate positioning of a pointing device) and making the interpretation of the precision of this positioning specification dependent on the zoom level is equivalent to permitting the use of spatial synonyms (i.e., letting spatial proximity play a role rather than only seeking an exact match of a query string).  Of course, this is all predicated on the use of a textual specification of locations rather than a geometric one, which means that one must deal with the potential for ambiguity. The issues that arise in the design of a system like NewsStand, including the identification of words that correspond to geographic locations, are discussed, and examples are provided of its utility. More details can be found in the video at http://vimeo.com/106352925 which accompanies the "cover article" of the October 2014 issue of the Communications of the ACM about NewsStand which can be found at http://tinyurl.com/newsstand-cacm or a cached version can be found at http://www.cs.umd.edu/~hjs/pubs/cacm-newsstand.pdf

Biography

Hanan Samet http://www.cs.umd.edu/~hjs/ is a Distinguished University Professor of Computer Science at the University of Maryland, College Park and is a member of the Institute for Computer Studies.  He is also a member  of the Computer Vision Laboratory at the Center for Automation Research where he leads a number of research projects on the use of hierarchical data structures for database applications, geographic information systems, computer graphics, computer vision, image processing, games, robotics, and search.  He received the B.S. degree in engineering from UCLA, and the M.S. Degree in operations research and the M.S. and Ph.D. degrees in computer science from Stanford University. His doctoral dissertation dealt with proving the correctness of translations of LISP programs which was the first work in translation validation and the related concept of proof-carrying code. He is the author of the recent book "Foundations of Multidimensional and Metric Data Structures" http://www.cs.umd.edu/~hjs/multidimensional-book-flyer.pdf published  by Morgan-Kaufmann, an imprint of Elsevier, in 2006, an award winner in the 2006 best book in Computer and Information Science competition of the Professional and Scholarly Publishers (PSP) Group of the American Publishers Association (AAP), and of the first two books on spatial data structures "Design and Analysis of Spatial Data Structures", and "Applications of Spatial Data Structures: Computer Graphics, Image Processing, and GIS", both published by Addison-Wesley in 1990.  He is the Founding Editor-In-Chief of the ACM Transactions on Spatial Algorithms and Systems (TSAS), the founding chair of ACM SIGSPATIAL, a recipient of a Science Foundation of Ireland (SFI) Walton Visitor Award at the Centre for Geocomputation at the National University of Ireland at Maynooth (NUIM), 2009 UCGIS Research Award, 2010 CMPS Board of Visitors Award at the University of Maryland,  2011 ACM Paris Kanellakis  Theory and Practice Award, 2014 IEEE Computer Society Wallace McDowell Award, and a Fellow of the ACM, IEEE, AAAS, IAPR (International Association for Pattern Recognition), and UCGIS (University Consortium for Geographic Science).  He received best paper awards in the 2007 Computers & Graphics Journal, the 2008 ACM SIGMOD and SIGSPATIAL ACMGIS Conferences, the 2012 SIGSPATIAL MobiGIS Workshop, and the 2013 SIGSPATIAL GIR Workshop, as well as a best demo award at the 2011 SIGSPATIAL ACMGIS'11 Conference. His paper at the 2009 IEEE International Conference on Data Engineering (ICDE) was selected as one of the best papers for publication in the IEEE Transactions on Knowledge and Data Engineering.  He was elected to the ACM Council as the Capitol Region Representative for the term 1989-1991, and is an ACM Distinguished Speaker.

Apresentação do novo mestrado

15 dezembro 2014, 13:37 - Lucília Abreu

A sessão de esclarecimentos sobre o novo MEIC decorrerá no próximo dia 19 de Janeiro de 2015. Informação disponível aqui.

Pré-candidaturas para a 17ª edição do POSI E3

12 dezembro 2014, 12:10 - Carlos António Roque Martinho

Estão abertas as pré-candidaturas para a 17ª edição da Pós-Graduação em Sistemas de Informação, Especialização em Engenharia Empresarial (POSI E3) que decorrerá entre Abril de 2015 e Março de 2016.

Mais informação em: https://sites.google.com/site/posie3site/candidaturas