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BIR&D award voor Sem Peelman

Op 3 februari ontvangt Sem Peelman, student van ons departement, de BIR&D award voor zijn bijdrage in het multidisciplinaire SmartCare project (zie smartcare.be). In het door de UA gelanceerde project verkenden de teams de toepasbaarheid van ijle technieken bij het modelleren van bio-electrische signalen. Een van die ijle technieken werd aan de UA ontwikkeld in de onderzoeksgroep CANT (prof. dr. Annie Cuyt) en inmiddels gepatenteerd.

De award ceremonie wordt voorafgegaan door een perslunch waarop student en promotor het project en de behaalde resultaten toelichten (zie www.birdbelgium.com).

Event date and time: 
February 3, 2012

Phd-Defense Bram Reps: "Iterative and multigrid methods for wave problems with complex-valued boundaries"

Dissertation Bram Reps Public defense of the PhD-thesis: “Iterative and multigrid methods for wave problems with complex-valued boundaries”, by Bram Reps.

The defense is public and takes place in aula Jan Fabre (G0.10) of building G, Middelheimlaan 1, 2020 Antwerpen.

Abstract: The ultimate goal of many a research is to develop an efficient solver for wave and scattering problems that are described by the Helmholtz equation defined on infinite domains. With this thesis we contribute our ideas and insights to this rich but still incomplete branch of applied mathematics. Exterior complex scaling is used to enforce outgoing boundary conditions on the truncated numerical domain. In this light, we have developed an innovative multigrid inverted preconditioner for the numerical solution of indefinite Helmholtz problems with Krylov subspace methods, that is based on complex stretched grids. The multigrid method is further stabilized with non-standard smoothing components for the inversion of competitive preconditioners of which the wave number dependency is examined. The ideas are founded on new theoretical results on the spectrum of the Helmholtz operator with a constant wave number that is discretized with complex-valued mesh widths. Numerical results, on the one hand, confirm the analysis and, on the other hand, verify its usefulness for more general heterogeneous two- and three-dimensional Helmholtz models that originate from both acoustics and quantum mechanical break-up problems.

Event date and time: 
January 11, 2012 - 16:00 - 18:00

MPM Workshop

 Meeting on Multi Paradigm Modeling

  • Date: Tuesday, December 20th, 2011 - 13:00 - 16:00
  • Location: Univeristy of Antwerp - Campus Middelheim - Room G005
  • Contact Person: Hans Vangheluwe

Agenda

  • Talk by Juan de Lara (UaM, Spain) "Flexible Model-Driven Engineering through Deep Meta-modelling and Genericity"
  • Talk by Dennis Wagelaar (VUB) "Towards a general composition semantics for rule-based model transformations"
  • Talk by Tom Mens and Romuald Deshayes (UMons) "Modeling the interactive behaviour of 3D objects"
Event date and time: 
December 20, 2011 - 13:00 - 16:00

Seminar on Oscillatory Integrals and its applications

You are invited to a seminar organized by the Applied Math and Numerical Analysis group.
Friday 28 October: CMI G.017 13h00

Seminar on Oscillatory Integrals and its applications.
The are two speakers.
Title: Numerical Methods for oscillatory Integrals
Speaker: Daan Huybrechs, K.U.Leuven.
Abstract: Oscillatory integrals appear in a wide variety of scientific disciplines. Their numerical evaluation is often a time-consuming part of numerical simulations, due to the perceived need for sampling the integrand at a sufficiently high rate. On the other hand, oscillatory integrals are a classical topic in asymptotic analysis. Results in this field surprisingly indicate that there is no mathematical reason for the need to sample at a rate proportional to the frequency of the integrand. Recent numerical methods exploit the asymptotic behavior of oscillatory integrals and can evaluate highly oscillatory integrals at a fixed cost, independent of the frequency. We review a selection of techniques and discuss their applicability and limitations.
Title: Scattering Calculations in the Oscillator Representation. Speaker: Wim Vanroose, U. Antwerpen.
Abstract: Many physical problems are solved in the oscillator representation, a L^2 basis formed by the eigenstates of the harmonic oscillator. These are based the Hermite and Laguerre orthogonal polynomials for, respectively, 1D and 3D problems. However, often very large basis sets are required and this requires polynomials of very high order which leads to the evaluation of many oscillatory integrals. In the talk we discuss the asymptotic properties of oscillatory integrals that allow us to replaces a large part of the problem with a sparse approximation. Various examples from physics are being discussed.

Symposium on Pattern Discovery

Your are cordially invited to the Symposium on Pattern Discovery, featuring several invited talks on various data mining topics. The symposium will be held on Friday the 21st of October 2011. Afterwards it is followed by the public PhD defense of Michael Mampaey.

Programme:

  • 10:00h Welcome coffee
  • 10:30h Toon Calders (Eindhoven University of Technology): "Online Discovery of Top-k Similar Motifs in Time Series Data"
  • 11:15h Arno Siebes (Utrecht University): "Association Rules That Compress"
  • 12:00h Lunch break
  • 13:30h Geoff Webb (Monash University): "Finding Interesting Itemsets"
  • 14:15h Floris Geerts (University of Antwerp): "Data Quality: Research Opportunities in Data Mining"
  • 15:00h Coffee break
  • 16:00h Public PhD defense of Michael Mampaey: "Summarizing Data with Informative Patterns"

If you wish to attend, please go to http://adrem.ua.ac.be/michael.mampaey/phd for more information.

Event date and time: 
October 21, 2011 - 10:00 - 16:00

PhD Defense Michael Mampaey: "Summarizing Data with Informative Patterns"

Dissertation Michael Mampaey
Public defense of the PhD thesis entitled "Summarizing Data with Informative Patterns", by Michael Mampaey.

The defense is public and takes place at: Promotiezaal, klooster van de Grauwzusters, Lange Sint-Annastraat 7, 2000 Antwerpen. For more information, see http://adrem.ua.ac.be/michael.mampaey/phd.

Event date and time: 
October 21, 2011 - 16:00 - 18:00

Breviz: Spreadsheet Visualization and Quality Analysis

ABSTRACT: Thanks to their flexibility and intuitive programming model, spreadsheets are widely used in industry, often for business-critical applications. Similar to software developers, professional spreadsheet users demand support for maintaining and transferring their spreadsheets. In this talk we will explain Breviz, a tool that visualizes spreadsheets as leveled dataflow diagrams, showing users all worksheet in a spreadsheet and the data that is flowing between them.

When developing Breviz, we first studied the problems and information needs of professional spreadsheet users by means of a survey conducted at a large financial company. Based on these needs, we then created an approach that extracts this information from spreadsheets and presents it in a compact and easy to understand way, using leveled dataflow diagrams. Our approach comes with three different views on the dataflow and allows the user to analyze the dataflow diagrams in a top-down fashion also using slicing techniques.

To evaluate the usefulness of the proposed approach, we conducted a series of interviews as well as nine case studies in an industrial setting. The results of the evaluation clearly indicate the demand for and usefulness of our approach to ease the understanding of spreadsheets. In addition to these results we will discuss new applications of our dataflow extraction system, such as the their use to assess spreadsheet quality and help detect anomalies in spreadsheets.

SPEAKER: Felienne Hermans

BIO: Felienne Hermans is a PhD student and an entrepreneur in the field of spreadsheet visualization. She started her PhD in 2008 and has since published spreadsheet papers at ECOOP 2010, ICSE 2011 and Eusprig 2011. In 2010 Felienne was one of the founders of spreadsheet spinoff Infotron, that uses the algorithms developed during the PhD project to analyze spreadsheet quality for large companies.

REGISTRATION: Attending the talk is free of charge, but if you are planning to attend please send an e-mail to Quinten Soetens (quinten.soetens@ua.ac.be) so that we have an idea of the amount of participants. Feel free to forward this invitation to anyone you think may be interested.

The talk is located at :

University of Antwerp
Campus Middelheim - room G006
Middelheimlaan 1
2020 Antwerpen

Event date and time: 
September 1, 2011 - 11:00 - 12:00

Seminar -- Embedded Source Code Quality Control

DSP Valley, Karel de Grote Hogeschool and University of Antwerp kindly invite you to another interesting technology seminar:

Embedded Source Code Quality Control

September 20th, 2011
University of Antwerp, campus Middelheim

Software failures are inadmissible in the embedded software industry, especially for safety-critical systems. However, writing high-quality software that operates safely and reliably is very hard. Traditional design postpone tests until the end of the process, which is a recipe for disaster..

Classical testing techniques can only uncover the presence of defects, but not their absence. Moreover, the later a bug is detected, the more costly it is to repair. Today, a wide range of design methods and assisting tools facilitate the software developers’ task to write robust code from the start of the project.

In this seminar, the following topics will be addressed by speakers both from industry and academia: global software quality assurance, static code analysis, MISRA-C source code guidelines and tools, Agile for software quality control and test driven design. We conclude the seminar with an interactive panel discussion in which the experts answer questions from the public.

For more practical details, please visit the Seminar Website.
http://www.dspvalley.com/en/events/84/

Programme

• 13h00 - Registration and coffee
• 13h30 - Introduction (Bjorn Van de Vondel - DSP Valley)
• 13h45 - Evaluating and Guiding the use of Coding Standards to reduce Software faults (Dr. Leon Moonen - Simula Research Laboratory, Norway)
• 14h20 - Static code analysis tools for MISRA-C 2004 Compliancy (Dr. ir. Marijn Temmerman - TERA-Labs, Karel de Grote Hogeschool, Antwerp)
• 14h55 - Test-driven development in an embedded software environment (Dr. ing. Jeroen Boydens - EP research group, KHBO, Ostend)
• 15h30 - Coffee Break
• 16h00 - Agile Quality Assurance (Prof.Dr. Serge Demeyer - LORE research group, University of Antwerp)
• 16h35 - Controlling Embedded Software Quality (ing. Jan Verbeke - Philips Consumer Electronics, Bruges)
• 17h10 - Panel discussion moderated by prof.Dr. Roel Wuyts, imec - K.U.Leuven
• 18h00 - Networking drink
Registration fees

Registration is mandatory and can be done by using the online registration form.

DSP Valley Member - Student : Free
DSP Valley Associated member : 80,00 €
Other : 125,00 €

Mini-Exhibition

During the event the participants will have the opportunity to visit some information booths in the lobby, next to the auditorium where the presentations will be given.

Event date and time: 
September 20, 2011 - 13:00 - 19:00
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