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Série de Seminários do INF | Seminários 2019/02

Todos os seminários acontecem às 12:45 e têm duração de aproximadamente 45 minutos seguido de perguntas.


  • 09/10
    • Título: Reproducible Research: where do we stand?
    • Palestrante: Prof. Arnaud Legrand – CNRS
    • Local: Auditório Inferior (67)
    • Resumo: Reproducibility of experiments and analysis by others is one of the pillars of modern science. Yet, the description of experimental protocols, software, and analysis is often lacunar and rarely allows a third party to reproduce a study. Such inaccuracies has become more and more problematic and are probably the cause of the increasing number of article withdrawal even in prestigious journals and the realization by both the scientific community and the general public that many research results and studies are actually flawed and misleading. Open science is the umbrella term of the movement that strives to make scientific research, data and dissemination accessible to all levels of an inquiring society. Reproducible research encompasses the technical and social aspects of science allowing and promoting better research practices. In this talk, I will give a broad overview of the challenges at stake and of emerging solutions. I will also particularly discuss the role computer science can play in this topic.
    • Short-bio: Arnaud Legrand is a tenured CNRS researcher at Grenoble University, France since 2004. He obtained his Ph.D. from the Ecole Normale Supérieure de Lyon, France in 2003 and he currently leads the POLARIS project at Inria Grenoble. His research interests encompass the study of large scale distributed computing infrastructures such as clusters, grids, desktop grids, volunteer computing platforms, clouds, … when used for scientific computing. More specifically, his research focuses on theoretical tools for optimizing the exploitation of such platforms (scheduling techniques, combinatorial optimization and game theory) and on performance evaluation of such systems, in particular through simulation, visualization and statistical analysis. He is one of the leaders of the SimGrid project, an open source simulation toolkit whose specific goal is to facilitate research in the area of parallel and distributed system optimization. In the last five years, he has been actively promoting better experimental practices and scientific methodology of through numerous tutorials and keynotes in conferences and summer schools.


  • 25/09
    • Título: Similar yet Different: the Structure of Social Networks of Characters in Seinfeld, Friends, How I Met Your Mother, and The Big Bang Theory
    • Palestrante: Ana Bazzan
    • Local: Auditório Inferior (67)
    • Resumo: The theory of complex systems is responsible for a boom on using network science (another name for our long time acquaintance, graph theory). Indeed the theory of network science in general and social networks in particular has found surprising applications with amazing results. One such domain is the analysis of fictional characters network. A recent survey by Labatut and Bost (to appear, ACM Comp. Surveys) has analyzed more than 200 papers — including two of our group — dealing with novels, plays, movies, and TV series, focusing on extraction of the network, its analysis, and the role of network science there. Our works in this survey aim at (i) developing new mathematical frameworks to deal with temporal aspects in two fictions (Alice in Wonderland and La Chanson de Roland), and (ii) assessing the truth of some well-known facts about the sitcom Friends, obviously from the social network perspective. Two other, ongoing and unpublished, works deal with comparison of sitcoms: Friends and The Big Bang Theory, and these two plus Seinfeld and How I met your Mother, since all of them are about a bunch of friends living in big cities, dealing with the odds in their careers, love life, and friendship. How similar are, e.g., Friends and How I Met Your Mother (a much discussed topic in Internet forums)? Come and find the answer.
    • Short-bio: Graduou-se em Engenharia pela Universidade de São Paulo (EPUSP); possui ainda os graus de mestre em Ciências da Computação pela Universidade Federal do Rio Grande do Sul (1992) e doutora pela Universidade de Karlsruhe (1997). Entre 1997 e 1998 atuou como “Research Assistant” na Universidade de Massachusetts (Amherst) no grupo do prof. Victor Lesser. Desde 1999 ocupa o cargo de professora na Universidade Federal do Rio Grande do Sul (desde 2016 como professora titular). Realizou pós-doutorado (2006-2007) na Universidade Würzburg com fellowship da Fundação Alexander von Humboldt. É bolsista de Produtividade em Pesquisa do CNPq – Nível 1C. Atividades Profissionais: keynote speaker of AAMAS 2017, Co-general chair da conferência 13th AAMAS (Paris, 2014), Area chair da conferência IJCAI 2017, general chair da conferência MATES 2014; invited plenary speaker na conferência AAMAS 2017. Assoc. Editor dos periódicos J. of Vehicle Routing Algorithms (2017-), Journal of Autonomous Agents and Multiagent Systems (2010-2017) e Advances in Complex Systems (2007-2017); membro do corpo editorial do periódico Multiagent and Grid Systems (até 2017). Membro do board do IFAAMAS (2004-2008 e 2014-2020). Revisora de periódicos (seleção): Artificial Intelligence; Transportation research, Part C (Emerging technologies); IEEE Transactions on Knowledge and Data Engineering; IEEE Transactions on Intelligent Transportation Systems; Journal of Int. Transportation Systems; Int. J. of Autonomous Agents and Multiagent Systems; Int. J. of Modern Physics C; Games and Economic Behavior; Int. J. of Computational Intelligence and Applications; IEEE Transactions on Systems Man and Cybernetics; International journal of cooperative information systems; Eng. Applications of AI; Revista de Informatica Teórica e Aplicada; Journal of the Brazilian Computer Society. Tem experiência na área de Inteligência Artificial, com ênfase em Sistemas Multiagentes, atuando principalmente nos seguintes temas: aprendizado em sistemas multiagente, alocação de tarefas em sistemas multiagente, coordenação em sistemas multiagente, simulação e controle de tráfego veicular, controle semafórico, alocação de tráfego, aplicações de teoria de jogos.


  • 28/08 às 12h45
    • Título: A evolução do ecossistema de governança da Internet
    • Palestrante: Flavio Wagner, UFRGS
    • Local: Auditório Inferior (67)
    • Resumo: Esta palestra tratará da evolução do ecossistema internacional de governança da Internet, desde suas origens na década de 90 até os dias atuais. Serão introduzidas as entidades técnicas clássicas (ICANN, ISOC/IETF, RIRs, W3C), que são responsáveis pela governança dos padrões e das funções do núcleo técnico da Internet, sendo dada ênfase ao modelo multissetorial de governança da ICANN, que administra nomes de domínio e números IP. A palestra mostrará como a governança da Internet evoluiu e passou a abranger um largo espectro de questões não-técnicas, tratando de aspectos sociais, econômicos, culturais, legais e políticos relacionados à enorme influência da Internet na vida da sociedade. O Internet Governance Forum, da ONU, será analisado como espaço de debate deste amplo conjunto de temas. Será feita uma análise da situação atual e dos desafios futuros, relacionados à crescente fragmentação do debate, com a entrada de muitos novos fóruns e entidades, muitas vezes se superpondo, tratando de questões tão variadas como cibersegurança, privacidade, “fake news”, economia de dados, regulação das grandes plataformas digitais e impactos da Inteligência Artificial. A situação no Brasil será rapidamente abordada, mostrando-se o papel e os desafios do CGI.br, o Comitê Gestor da Internet no Brasil.
    • Short bio: O Prof. Flávio R. Wagner é Professor Titular aposentado do Instituto de Informática da UFRGS, onde continua atuando como docente convidado. Ele foi Diretor do INF e do Parque Científico e Tecnológico Zenit da UFRGS e Presidente da Sociedade Brasileira de Computação. Ele foi Conselheiro do Comitê Gestor da Internet no Brasil, entre 2008 e 2017, e reuniu larga experiência nas questões de governança da Internet em função de sua participação em múltiplos fóruns e entidades nos contextos nacional e internacional.
  • 14/08 às 12h45
    • Título: Performance Harvesting in the post Moore era
    • Palestrante: Luigi Carro, UFRGS
    • Local: Auditório Inferior (67)
    • Abstract: As long as Moore´s law has been around, new computer applications have blossomed, and everyday life nowadays is strongly based on some sort of iteration with hidden or explicit computers. Technology scaling (or Moore´s law) allowed integration of more devices, with benefits in speed and energy. As Moore´s law loses steam, software development faces new challenges, because the lack of faster and more efficient processors can compromise the much needed evolution in new application domains like self driven vehicles and service automation. As the software problem increases, one must allow scalability of the hardware to solve a bigger problem in a constant time, or to solve the same problem in a shorter time, without changing the software base or requiring extensive software modifications. In this talk we will discuss Performance Harvesting, a way to sustain Moore´s law even without technology help, for the next generation computer applications.
    • Short-bio: Luigi Carro received the Electrical Engineering and the MSc degrees from Universidade Federal do Rio Grande do Sul (UFRGS), Brazil, in 1985 and 1989, respectively. From 1989 to 1991 he worked at ST-Microelectronics, Agrate, Italy, in the R&D group. In 1996 he received the Dr. degree in the area of Computer Science from Universidade Federal do Rio Grande do Sul (UFRGS), Brazil. He is presently a full professor at the Applied Informatics Department at the Informatics Institute of UFRGS, in charge of Computer Architecture and Organization. He has advised more than 20 graduate students, and has published more than 150 technical papers on those topics. He has authored the book Digital systems Design and Prototyping (2001-in Portuguese) and is the co-author of Fault-Tolerance Techniques for SRAM-based FPGAs (2006-Springer), Dynamic Reconfigurable Architectures and Transparent optimization Techniques (2010-Springer) and Adaptive Systems (Springer 2012). In 2007 he received the prize FAPERGS – Researcher of the year in Computer Science. His most updated resume is located in http://lattes.cnpq.br/8544491643812450. For the latest news, please check www.inf.ufrgs.br/~carro