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[Seminaire-LRDE] Mercredi 18 février 2015: Yann Azoury, Faveod

by Daniela Becker

Chers collègues, La prochaine session du séminaire Performance et Généricité du LRDE (Laboratoire de Recherche et Développement de l'EPITA) aura lieu le Mercredi 18 février 2015 (11h00--12h30), Salle L0 du LRDE. Vous trouverez sur le site du séminaire [1] les prochaines séances, les résumés, captations vidéos et planches des exposés précédents [2], le détail de cette séance [3] ainsi que le plan d'accès [4]. [1] http://seminaire.lrde.epita.fr [2] http://seminaire.lrde.epita.fr/Archives [3] http://seminaire.lrde.epita.fr/2015-02-18 [4] http://www.lrde.epita.fr/Contact Au programme du Mercredi 18 février 2015 : * 11h: Faveod, meta-modèle au service de la qualité logicielle -- Yann Azoury, Faveod www.faveod.com L’accroissement exponentiel de la complexité technique des logiciels métiers a du mal à être compensée par les progrès du génie logiciel : les coûts et les délais augmentent jusqu’à ce que l’intérêt de l’informatique soit fondamentalement remis en cause dans certains cas, arguments rationnels et légitimes à l’appui. Cette anomalie épistémologique s’explique pourtant par des erreurs technologiques récurrentes dans l’histoire, des pièges et des culs-de-sac ralentissant le progrès scientifique. Parmi ces freins : la dette technique, l’utilisation de trop de technologies, trop élitistes pour être correctement utilisées en général, et le niveau maximal de compréhension et d’analyse de chaque humain, qui est fortement variable mais toujours plafonné. La technologie Faveod sert à éviter ces freins par la formalisation structurée et factorisée des besoins métiers, applicatifs et techniques dans un modèle générique et exhaustif. L’analyse continue des évolutions collaboratives de ce modèle permet la production totalement automatisée et instantanée de sa traduction technique : l’application cible en cohérence et en qualité. La gestion de la complexité des facteurs influant sur la qualité logicielle étant déléguée à la technologie, il devient possible d’augmenter son niveau par accumulation linéaire sans dépendre des facteurs humains limitants. -- Yann Azoury, EPITA SIGL 2006, a toujours travaillé pour des éditeurs de logiciels en France et aux Etats-Unis. En 2002, sa participation au projet de portage d’OpenOffice pour Mac OS X pour le compte d’Apple lui permet d'atteindre ses propres limites d’analyse et donc de comprendre la nécessité de les dépasser par des outils. Ainsi, en 2005, il crée le projet Faveod pour ce faire et fonde la société éponyme en 2007 pour diffuser cette technologie. L'entrée du séminaire est libre. Merci de bien vouloir diffuser cette information le plus largement possible. N'hésitez pas à nous faire parvenir vos suggestions d’orateurs. -- Akim Demaille Akim.Demaille(a)lrde.epita.fr _______________________________________________ Seminaire mailing list Seminaire(a)lrde.epita.fr https://lists.lrde.epita.fr/listinfo/seminaire

9 years, 10 months

[2nd CfP] European Lisp Symposium 2015, April 20-21, London

by Didier Verna

ELS'15 - 8th European Lisp Symposium Goldsmiths College, London, UK April 20-21, 2015 http://www.european-lisp-symposium.org/ Sponsored by EPITA, Franz Inc. and Lispworks Ltd. Recent news: - Submission deadline in less than a month now! - Programme committee has been announced (see below) - Venue information now available on the web site The purpose of the European Lisp Symposium is to provide a forum for the discussion and dissemination of all aspects of design, implementation and application of any of the Lisp and Lisp-inspired dialects, including Common Lisp, Scheme, Emacs Lisp, AutoLisp, ISLISP, Dylan, Clojure, ACL2, ECMAScript, Racket, SKILL, Hop and so on. We encourage everyone interested in Lisp to participate. The 8th European Lisp Symposium invites high quality papers about novel research results, insights and lessons learned from practical applications and educational perspectives. We also encourage submissions about known ideas as long as they are presented in a new setting and/or in a highly elegant way. Topics include but are not limited to: - Context-, aspect-, domain-oriented and generative programming - Macro-, reflective-, meta- and/or rule-based development approaches - Language design and implementation - Language integration, inter-operation and deployment - Development methodologies, support and environments - Educational approaches and perspectives - Experience reports and case studies We invite submissions in the following forms: Papers: Technical papers of up to 8 pages that describe original results or explain known ideas in new and elegant ways. Demonstrations: Abstracts of up to 2 pages for demonstrations of tools, libraries, and applications. Tutorials: Abstracts of up to 4 pages for in-depth presentations about topics of special interest for at least 90 minutes and up to 180 minutes. The symposium will also provide slots for lightning talks, to be registered on-site every day. All submissions should be formatted following the ACM SIGS guidelines and include ACM classification categories and terms. For more information on the submission guidelines and the ACM keywords, see: http://www.acm.org/sigs/publications/proceedings-templates and http://www.acm.org/about/class/1998. Important dates: - 22 Feb 2015: Submission deadline - 15 Mar 2015: Notification of acceptance - 29 Mar 2015: Early registration deadline - 05 Apr 2015: Final papers - 20-21 Apr 2015: Symposium Programme chair: Julian Padget, University of Bath, UK Local chair: Christophe Rhodes, Goldsmiths, University of London, UK Programme committee: Sacha Chua — Toronto, Canada Edmund Weitz — University of Applied Scicences, Hamburg, Germany Rainer Joswig — Hamburg, Germany Henry Lieberman — MIT, USA Matthew Flatt — University of Utah, USA Christian Queinnec — University Pierre et Marie Curie, Paris 6, France Giuseppe Attardi — University of Pisa, Italy Marc Feeley — University of Montreal, Canada Stephen Eglen — University of Cambridge, UK Robert Strandh — University of Bordeaux, France Nick Levine — RavenPack, Spain Search Keywords: #els2015, ELS 2015, ELS '15, European Lisp Symposium 2015, European Lisp Symposium '15, 8th ELS, 8th European Lisp Symposium, European Lisp Conference 2015, European Lisp Conference '15 -- My new Jazz CD entitled "Roots and Leaves" is out! Check it out: http://didierverna.com/records/roots-and-leaves.php Lisp, Jazz, Aïkido: http://www.didierverna.info

9 years, 11 months

Nouvelle publication

by Souheib Baarir

J’ai le plaisir de vous annoncer que le papier suivant a été accepté pour publication dans la 30e édition de SAC (ACM/SIGAPP Symposium On Applied Computing) : D. Khelladi (1), R. Bendraou (1), S. Baarir (2), Y. Laurent (1), M.‑P. Gervais (1) : A Framework to Formally Verify Conformance of a Software Process to a Software Method <https://publications.lip6.fr/index.php/publications/show/11054> ». (1) Sorbonne Universités, UPMC Univ. Paris 06, France, CNRS UMR 7606, LIP6, F-75005 Paris, France (2) LRDE, EPITA, Kremlin-Bicêtre, France ABSTRACT The increasing complexity of development projects requires methodological frameworks or methods to support development processes. A method comes with a set of best practices that are enforced and instantiated into processes to drive the realization steps of the development projects. However, those best practices come in the form of text in guides and books, or they are in the developer’s mind. Thus, during an instantiation of a method, there is no guaranty to enforce its best practices into the process, which could impact negatively the criteria: cost, time, and quality. To cope with this issue, we propose a library of constraints to be checked for four popular methods: Unified Process, Extreme Programming, Scrum and Kanban. It represents a set of best practices of these four methods that must be enforced during the instantiation. On top of this library we have built up a template-based constraint language, and implemented it to express additional constraints on processes that are modeled with UML Activity Diagrams (AD). To apply formal verification we leverage on our formalization of the way UML AD operates based on fUML semantics. The evaluation showed the feasibility of our approach as well as the feasibility to check constraints of different dimensions, i.e. time, resource, control-flow, and data-flow.

9 years, 11 months

New Publication: TACAS'15

by Etienne Renault

We are pleased to announce that the following paper has been accepted in the 21st International Conference on Tools and Algorithms for the Construction and Analysis of Systems (TACAS). Find the title and abstract below. Title and corresponding authors: Parallel Explicit Model Checking for Generalized Büchi Automata Etienne Renault(1,2,3), Alexandre Duret-Lutz(1), Fabrice Kordon(2,3) and Denis Poitrenaud(3,4) (1) LRDE, EPITA, Kremlin-Bicêtre, France (2) Sorbonne Universités, UPMC Univ. Paris 06, France (3) CNRS UMR 7606, LIP6, F-75005 Paris, France (4) Université Paris Descartes, Paris, France Abstract: We present new parallel emptiness checks for LTL model checking. Unlike existing parallel emptiness checks, these are based on an SCC enumeration, support generalized Büchi acceptance, and require no synchronization points nor repair procedures. A salient feature of our algorithms is the use of a global union-find data structure in which multiple threads share structural information about the automaton being checked. Our prototype implementation has encouraging performances: the new emptiness checks have better speedup than existing algorithms in half of our experiments.

9 years, 11 months

Session at the next ACCU conference

by Didier Verna

Hello, I'm pleased to announce that I will hold a 90 minutes session at the next ACCU conference, Bristol, April 2015. The abstract follows: Referential transparency is overrated The expression "referential transparency" itself is already confusing and subject to interpretation, according to whether you're in the context of natural, functional or imperative languages. In any of those contexts however, referential transparency is generally regarded as a Good Thing(tm). In computer science for example, it helps to reason about programs, prove them, optimize them, and even enables some paradigms such as normal order (lazy) evaluation. In this talk, we claim that referential transparency is overrated because it also limits your expressive power. We demonstrate some neat and tricky things that we can do only when referential transparency is broken, and we explain the language constructs and techniques that allow us to break it intentionally, both at the regular and meta-programming levels. Such tools include duality of syntax and syntax extension, mixing of different scoping policies, intentional variable capture and free variable injection, lexical communication channels, anaphoric macros. Please fasten your seat belts, as we're going to explore mostly uncharted territory. Whether these techniques are considered extremely powerful, extremely unsafe, or extremely bad style is a matter of personal taste. In fact, they are probably all of that, and much more... -- My new Jazz CD entitled "Roots and Leaves" is out! Check it out: http://didierverna.com/records/roots-and-leaves.php Lisp, Jazz, Aïkido: http://www.didierverna.info

10 years

Biological Realms in Computer Science

by Didier Verna

Hello, I'm happy to report that my keynote at the last ACCU conference (Bristol, April 2014), entitled "Biological Realms in Computer Science", has been filmed and is now online at the following address: http://www.infoq.com/presentations/biology-computer-science "Didier Verna keynotes on the bonds between biology and computer science, how these bonds developed over the years, and how software could behave like living organisms." -- My new Jazz CD entitled "Roots and Leaves" is out! Check it out: http://didierverna.com/records/roots-and-leaves.php Lisp, Jazz, Aïkido: http://www.didierverna.info

10 years

[Seminaire-LRDE] Mercredi 10 déc 2014: Une nouvelle approche pour la gestion de la mémoire avec CUDA -- Raphaël Boissel

by Akim Demaille

Chers collègues, La prochaine session du séminaire Performance et Généricité du LRDE (Laboratoire de Recherche et Développement de l'EPITA) aura lieu le Mercredi 10 décembre 2014 (11h00--12h00), Salle L0 du LRDE. Elle intéressera sans doute tous ceux qui travaillent avec des GPUs. Nous vous rappelons par ailleurs que la séance suivante aura lieu le mercredi 17 décembre 2014, voir plus bas dans ce message. L'entrée du séminaire est libre. Merci de bien vouloir diffuser cette information le plus largement possible. N'hésitez pas à nous faire parvenir vos suggestions d'orateurs. Au programme du Mercredi 10 décembre 2014 : * 11h: Une nouvelle approche pour la gestion de la mémoire avec CUDA -- Raphaël Boissel, EPITA, CSI https://developer.nvidia.com/cuda-toolkit Dans de nombreux domaines, de plus en plus de personnes cherchent à améliorer les performances de leurs programmes en faisant appel à une technique appelée le GPGPU: un ensemble d’outils et de techniques permettant d’utiliser le GPU d’une machine afin de lui déléguer d'autres calculs que les traditionnelles routines de dessins. Cependant, écrire un programme qui exploite à la fois le GPU et le CPU n’est pas une tâche facile. Même lorsque les algorithmes se prêtent bien à la programmation GPU il arrive que le gain en performance soit décevant. L’un des principaux problèmes reste la gestion de la mémoire et surtout du transfert de données entre le GPU et le CPU. En effet l'optimisation les temps de transfert est délicate et peut nécessiter plusieurs jours d’analyse et de réécriture pour obtenir de bonnes performances. CUDA offre de nouveaux outils pour résoudre ce problème. Des outils de profilage de code permettent de voir où se situe les problèmes de transfert. UVM (Unified Virtual Memory), le nouveau modèle de gestion de la mémoire, permet de tirer pleinement parti de CUDA bien plus facilement que par le passé. C’est à l’utilisation de ces nouvelles techniques que nous nous intéressons dans cette présentation. -- Étudiant au LRDE dans la majeure CSI (Calcul Scientifique et Image), Raphaël a fait son stage de fin d’étude chez NVidia, dans l’équipe CUDA driver. Il travaillait au sein de l'équipe sur UVM sur l’implémentation de nouvelles fonctionnalités pour ce nouveau modèle de gestion de la mémoire. Au programme du Mercredi 17 décembre 2014 : * 11h: D’un MOOC à l'autre -- Christian Queinnec, UPMC, LIP6 http://lip6.fr/Christian.Queinnec/ Au printemps 2014, j'ai animé un MOOC d'initiation à l'informatique, centré sur la programmation récursive. Bien que loin d'être massif, ce MOOC a permis d'expérimenter ce nouveau medium ainsi que de mettre à l'épreuve une infrastructure de correction automatisée. L'exposé portera sur ces deux aspects et présentera également les nouveautés prévues pour la prochaine édition de ce MOOC. -- Lispeur depuis 1974, Unixien depuis 1984, HDR depuis 1988, et depuis peu professeur émérite de l’UPMC. Surtout connu pour ses livres sur Lisp et Scheme, il a récemment animé le MOOC ``Programmation Récursive'' dont il sera question dans l’exposé. Vous trouverez sur le site du séminaire [1] les prochaines séances, les résumés, captations vidéos et planches des exposés précédents [2], le détail de cette séance [3] et la suivante [3], ainsi que le plan d'accès [5]. [1] http://seminaire.lrde.epita.fr [2] http://seminaire.lrde.epita.fr/Archives [3] http://seminaire.lrde.epita.fr/2014-12-10 [4] http://seminaire.lrde.epita.fr/2014-12-17 [5] http://www.lrde.epita.fr/Contact _______________________________________________ Seminaire mailing list Seminaire(a)lrde.epita.fr https://lists.lrde.epita.fr/listinfo/seminaire

10 years

[CfP] ELS 2015, 8th European Lisp Symposium, Apr. 20-21, London

by Didier Verna

ELS'15 - 8th European Lisp Symposium Goldsmiths College, London, UK April 20-21, 2015 http://www.european-lisp-symposium.org/ Sponsored by EPITA, Franz Inc. and Lispworks Ltd. The purpose of the European Lisp Symposium is to provide a forum for the discussion and dissemination of all aspects of design, implementation and application of any of the Lisp and Lisp-inspired dialects, including Common Lisp, Scheme, Emacs Lisp, AutoLisp, ISLISP, Dylan, Clojure, ACL2, ECMAScript, Racket, SKILL, Hop and so on. We encourage everyone interested in Lisp to participate. The 8th European Lisp Symposium invites high quality papers about novel research results, insights and lessons learned from practical applications and educational perspectives. We also encourage submissions about known ideas as long as they are presented in a new setting and/or in a highly elegant way. Topics include but are not limited to: - Context-, aspect-, domain-oriented and generative programming - Macro-, reflective-, meta- and/or rule-based development approaches - Language design and implementation - Language integration, inter-operation and deployment - Development methodologies, support and environments - Educational approaches and perspectives - Experience reports and case studies We invite submissions in the following forms: Papers: Technical papers of up to 8 pages that describe original results or explain known ideas in new and elegant ways. Demonstrations: Abstracts of up to 2 pages for demonstrations of tools, libraries, and applications. Tutorials: Abstracts of up to 4 pages for in-depth presentations about topics of special interest for at least 90 minutes and up to 180 minutes. The symposium will also provide slots for lightning talks, to be registered on-site every day. All submissions should be formatted following the ACM SIGS guidelines and include ACM classification categories and terms. For more information on the submission guidelines and the ACM keywords, see: http://www.acm.org/sigs/publications/proceedings-templates and http://www.acm.org/about/class/1998. Important dates: - 22 Feb 2015: Submission deadline - 15 Mar 2015: Notification of acceptance - 29 Mar 2015: Early registration deadline - 05 Apr 2015: Final papers - 20-21 Apr 2015: Symposium Programme chair: Julian Padget, University of Bath, UK Local chair: Christophe Rhodes, Goldsmiths, University of London, UK Programme committee: To be announced Search Keywords: #els2015, ELS 2015, ELS '15, European Lisp Symposium 2015, European Lisp Symposium '15, 8th ELS, 8th European Lisp Symposium, European Lisp Conference 2015, European Lisp Conference '15 -- My new Jazz CD entitled "Roots and Leaves" is out! Check it out: http://didierverna.com/records/roots-and-leaves.php Lisp, Jazz, Aïkido: http://www.didierverna.info

10 years

[Lrde] Publication accepted at VISAPP 2015

by Myriam Robert-Seidowsky

We are happy to announce that the following paper has been accepted to the 10th International Conference on Computer Vision Theory and Applications (VISAPP) that will take place in Berlin, on March 11 - 14, 2015: A self-adaptive likelihood function for tracking with particle filter Séverine Dubuisson (1), Myriam Robert-Seidowsky (2) and Jonathan Fabrizio (2) (1) CNRS, UMR 7222, ISIR, F-75005, Paris, France (2) LRDE-EPITA, 14-16, rue Voltaire, F-94276, Le Kremlin Bicêtre, France Abstract: The particle filter is known to be efficient for visual tracking. However, its parameters are empirically fixed, depending on the target application, the video sequences and the context. In this paper, we introduce a new algorithm which automatically adjusts ``on-line" two majors of them: the correction and the propagation parameters. Our purpose is to determine, for each frame of a video, the optimal value of the correction parameter and to adjust the propagation one to improve the tracking performance. On one hand, our experimental results show that the common settings of particle filter are sub-optimal. On another hand, we prove that our approach achieves a lower tracking error without needing tuning these parameters. Our adaptive method allows to track objects in complex conditions (illumination changes, cluttered background, etc.) without adding any computational cost compared to the common usage with fixed parameters. -- Myriam Robert-Seidowsky - LRDE/EPITA

10 years

[Lrde] Publication accepted at VISAPP 2015

by Myriam Robert-Seidowsky

We are happy to announce that the following paper has been accepted to the 10th International Conference on Computer Vision Theory and Applications (VISAPP) that will take place in Berlin, on March 11 - 14, 2015: TextTrail: A Robust Text Tracking Algorithm In Wild Environments Myriam Robert-Seidowsky (1), Jonathan Fabrizio (1) and Séverine Dubuisson (2) (1) LRDE-EPITA, 14-16, rue Voltaire, F-94276, Le Kremlin Bicêtre, France (2) CNRS, UMR 7222, ISIR, F-75005, Paris, France Abstract: In this paper, we propose TextTrail, a robust new algorithm dedicated to text tracking in uncontrolled environments (strong motion of camera and objects, partial occlusions, blur, etc.). It is based on a particle filter framework whose correction step has been improved. First, we compare some likelihood functions and introduce a new one that integrates tangent distance. We show that the likelihood function has a strong influence on the text tracking performances. Secondly, we compare our tracker with another and finally present an example of application. TextTrail has been tested on real video sequences and has proven its efficiency. In particular, it can track texts in complex situations starting from only one detection step without needing another one to reinitialize the tracking model. -- Myriam Robert-Seidowsky - LRDE/EPITA

10 years

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