Annual Report 2010 - Fachgruppe Informatik an der RWTH Aachen ...

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Code Graffiti: Communication by sketching for pair programming teams Leonhard Lichtschlag, Jan Borchers In pair programming, two software developers work on their code together in front of a single workstation, one typing, the other commenting. This frequently involves pointing to code on the screen, annotating it verbally, or sketching on paper or a nearby whiteboard, little of which is captured in the source code for later reference. CodeGraffiti lets pair programmers simultaneously write their code, and annotate it with ephemeral and persistent sketches on screen using touch or pen input. 346
Our design rationale is to give the navigator a way to support team conversation by sketching directly on the shared screen. Sketching and annotating should be as easy as picking up a pen to draw or write on paper or a whiteboard. The driver is still the only person entering syntactical code while the navigator enters semantic graphics that do not compile, making it easy to quickly jot down a sketch, explain a design idea or point out a typo to the driver. We integrated CodeGraffiti into the Xcode software development environment, to study how these techniques may improve the pair programming workflow. TaPS: Tangible Private Spaces Maximilian Möllers, Stephan Deininghaus, Patrick Zimmer, Jan Borchers Interactive tabletop systems resemble convenient environments for collaborative work. In these multi-user environments, private spaces are an important issue. However, treating information with different privacy levels on the same surface is difficult to realize with current technology. Existing approaches usually apply wearable devices, such as shutter glasses or head-mounted displays, which are expensive and cumbersome to wear. We present TaPS, lightweight transparent widgets through which light only passes from a particular direction, effectively creating Tangible Private Spaces that shield the content beneath them from the view of other users. These widgets add tangible control over privacy to interactive tabletops while using low-cost hardware. The widgets are crafted from acrylic with several layers of scattering foil on top. Each of those layers blurs the content beneath, when viewed from a specific 30-degree-wide angle. Combining multiple layers allows us to shield content for an arbitrary large angle. Each widget has a unique footprint of reflecting foil underneath, which can be registered by the table's camera system. Our system can learn these patterns beforehand in order to track the TaPS widgets live on the digital surface. To achieve this, we use our own touch and pattern detection framework developed in earlier projects. The widgets themselves are lightweight and can be picked up in order to reposition them or hand them over to other participants. With this, as well as with sliding the widgets over the table, we return to tangible, more natural hand-over gestures. Because content is only displayed while the widgets rest on the table, all these trade gestures warrant privacy of the handled data. 347
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Annual Report 2010 Computer Science
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Contents Preface ..................
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Preface It is a long standing tradi
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Otto Spaniol’s Retirement After 2
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Moving back to the lighter side, tw
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Next on the agenda was a true innov
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Computer Science Summer Party - Som
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Bright Minds in Computer Science -
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To close the big gap between school
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Two special editions of Informatik
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Teaching 21
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subject it builds the four majors o
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Linear Algebra; Stochastics; Numeri
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Software Development), Computer Sci
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The International Master Programme
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annotation, and retrieval of spatia
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Proseminar: Ausgewählte Kapitel de
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Anwendung und Nutzen von Prozess- u
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Geometrieverarbeitung Kobbelt, Dekk
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Postgraduate Courses - Winter Term
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Engineering (GloSE) Softwaretechnik
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05.11.2009: Wirtschaftliche Entwick
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VORNAME NACHNAME of Autosar) TITEL
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VORNAME NACHNAME TITEL Ferdi Kirmiz
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VORNAME NACHNAME TITEL Stephan Peit
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VORNAME NACHNAME TITEL Zeeshan Khan
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Overall Number of Students and Grad
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Algorithms and Complexity Staff •
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Overview Many technological innovat
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Dynamic Coordination in Large Netwo
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Design and Analysis of Algorithms i
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analyze distributed protocols for t
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Other Activities Courses Our group
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Talks and Publications Talks Alexan
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Jean Cardinal and Martin Hoefer. No
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Overview Our teaching and research
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The major goal of this project is t
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Other Activities Courses Our group
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Joachim Kneis, Daniel Meister, Jan
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D. Guck S. Herting C. Jansen M. Kam
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The group is happy to welcome Johan
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on efficient numerical methods and
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to the engineers and thus offer a c
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Project partners are universities,
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hybrid systems (SHS), which allows
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Synthesising of Model Based Testing
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and/or to prove the design correct.
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Erika Ábrahám: • Program commit
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Joost-Pieter Katoen. Abstraction of
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Erika Abraham, Ulrich Loup, Florian
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Daniela Lepri, Peter Csaba Ölveczk
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Overview Our research group is conc
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Termination Analysis for Logic and
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Automated Complexity Analysis J. Gi
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• Participant of the Workshop on
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Talks and Publications Talks C. Fuh
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Publications: Journals and Conferen
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Lars Noschinski. Automated Complexi
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• Externals Dipl.-Inform. M. Duka
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Funding comes from various sources,
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communication, the scheduling and i
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of personal data released to differ
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consumption status. A prototype of
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Global Software Engineering (GloSE)
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automatically computes testing metr
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important features of MontiCore’s
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Tool Integration for Heterogeneous
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Toolchain Integration in Requiremen
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demanded by several software houses
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REGINA-Arbeitskreis Cloud Computing
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• Member of the Program Committee
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Retkowitz, D.: Softwareunterstützu
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Berger, C., Rumpe, B.: Supporting A
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Software Construction Staff • Fac
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Research Projects Evaluating Busine
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Automatic Test Case Generation base
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Selection of Organisation Specific
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Talks and Publications Talks H. Lic
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Communication and Distributed Syste
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Overview In 2010 the former Chair I
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Research Projects Adaptive and Ligh
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• Establish ISO as lead organisat
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novel concept for Wi-Fi sharing com
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delegate certain tasks to other dev
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ability to store containers and cel
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UMIC Simulation Framework Georg Kun
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communication protocols on symbolic
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Other Activities Klaus Wehrle Progr
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Publications Aktas, I.; Otten, J.;
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Lora, M.A. (2010): QoE in Cooperati
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UMIC Mobile Network Performance Gro
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Research Projects Ultra-robust Wire
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Talks and Publications Talks J. Gro
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Information Systems Staff • Profe
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Overview Today, the field of Inform
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Future Mobile Internet Services: Mo
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part of the research initiative Ada
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DFG CONTici: Context Adaptive Inter
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state-of-the-art in human resource
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DAAD IKYDA: Non-linear Digital Stor
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infrastructures for scientific comm
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Models for Quality Management in Sc
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Other Activities Services Prof. Jar
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TEL’10, ICWL’10, Workshop STEG
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Talks and Publications Talks Y. Cao
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D. Kovachev: A Cloud Multimedia Pla
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Ralf Klamma, R. W. H. Lau, Shu-Chin
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Sandra Geisler, Christoph Quix, A.
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Zinayida Petrushyna, Ralf Klamma, M
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Knowledge-Based Systems & Cognitive
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Research Projects A Deliberative Re
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In the last three years we continuo
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implementation of the algorithm on
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esembling the branching time logic
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capture default reasoning mechanism
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Other Activities Program Committees
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Talks and Publications Talks Stefan
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Dipl.-Inform. M. Sundermeyer M.A. T
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• image recognition Most of these
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the most probable sentence. These m
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language understanding unit and a d
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Research Projects Global Autonomous
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The interpersonal communication pro
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B. J. Kröger, J. Kannampuzha, D. B
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Logic & Theory of Discrete Systems
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meeting of all German DFG-research
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surprising result that McNaughton
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exist practical algorithms for such
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• Member of the Evaluation Commit
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F. Radmacher: A Game for Reliable R
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[19] J. Olschewski and M. Ummels: T
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Overview The research group on Math
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combine logical and algebraic appro
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B. Puchala, Parity Games with Parti
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Computer Graphics and Multimedia Mo
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Overview The Chair of Computer Grap
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technologies for using recognition
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Practical Mixed-Integer Optimizatio
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A Sketching Interface for Feature C
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Generalized Use of Non-Terminal Sym
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Vision-Based Analysis and Reconstru
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SCRAMSAC: Improving RANSAC's Effici
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Ad-Hoc Multi-Displays for Mobile In
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Continuous Representation of Digita
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Level-Set Tracking for Automotive A
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Real-time Visual Object Detection P
Page 299 and 300: Other Activities Prof. Dr. Leif Kob
Page 301 and 302: • Member, Deutsche Arbeitsgemeins
Page 303 and 304: E. Horbert, Geometrically Constrain
Page 305 and 306: Data Management and Exploration Sta
Page 307 and 308: Data Analysis and Knowledge Extract
Page 309 and 310: prototypical one-cylinder engine fo
Page 311 and 312: Figure 5: OpenSubspace evaluation f
Page 313 and 314: Outlier Ranking in High Dimensional
Page 315 and 316: Relevance Feedback for the Explorat
Page 317 and 318: authenticate himself or herself in
Page 319 and 320: Other Activities Teaching Winter te
Page 321 and 322: Awards • Dipl.-Inform. Stephan G
Page 323 and 324: Assent I., Kremer H., Seidl T.: Spe
Page 325 and 326: Computer-Supported Learning Staff
Page 327 and 328: Overview Our focus in research and
Page 329 and 330: CoboCards GmbH and penetrated the E
Page 331 and 332: Daniel Herding presenting at DeLFI
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Page 335 and 336: The effect of the different measure
Page 337 and 338: Nadine Bergner • Co-organization
Page 339 and 340: Media Computing Group Staff • Fac
Page 341 and 342: Our group builds upon these results
Page 343 and 344: structure, and informal seating in
Page 345 and 346: The idea has been explored in three
Page 347 and 348: PinStripe: Eyes-free Continuous Inp
Page 349: Stacksplorer: Understanding Dynamic
Page 353 and 354: direct manipulation. Due to the sea
Page 355 and 356: Corona Many historical buildings ar
Page 357 and 358: CocoaHeads Since April 2008, we hav
Page 359 and 360: Talks and Publications Talks Usabil
Page 361 and 362: Christian Corsten. DragonFly: Spati
Page 363 and 364: • Guest Researcher:    Chak
Page 365 and 366: Research Projects [mc]square - Mode
Page 367 and 368: Synthesizing Best Transformers for
Page 369 and 370: UMIC Projects at i11 Carsten Weise
Page 371 and 372: Modelchecking Modular Protocols Car
Page 373 and 374: construction costs, the lack of sui
Page 375 and 376: Another issue in model-based develo
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Page 379 and 380: information from SNMP-based and fro
Page 381 and 382: Publications Biallas, S.; Brauer, J
Page 383 and 384: Schlich, B.; Brauer, J. & Kowalewsk
Page 385 and 386: Overview A recurring theme of the r
Page 387 and 388: Research Projects Over the past yea
Page 389 and 390: esearch groups: Applied Medical Eng
Page 391 and 392: Robust Shape Optimization for Artif
Page 393 and 394: • 1st Workshop on Automated Progr
Page 395 and 396: M. Lülfesmann. Computer-aided educ
Page 397 and 398: M. Probst, M. Lülfesmann, H. M. B
Page 399 and 400: Overview The focus of our research
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compute the gradient of the cost fu
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Waterways Engineering and Research
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methods to cases were our program r
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Other activities • Uwe Naumann is
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K. Rattanakornpunt, U. Naumann and
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• Student Researchers Dennis Effm
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Since recently, our research is als
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able to easily identify areas where
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VisPME - Visualization in Parallel
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With a novel VR-based modeling tool
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voxels with only a low number of pa
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Talks and Publications D. Holz: Soi
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D. Holz, T. Beer, T. Kuhlen (2009).
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Overview The research group IT-Secu
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Talks, Posters, and Publications Ta
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UMIC Mobile Network Performance Gro
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Research Projects Ultra-robust Wire
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Talks and Publications Talks J. Gro
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Parallel Programming Staff • Facu
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Research Activities Scalable Perfor
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Scalable Infrastructure for the Aut
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Other Activities Awards ICPP 2010 B
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Talks and Publications Talks M. Gei
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F. Wolf: Kranken Herzen helfen - In
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Wolfgang Frings, Felix Wolf, Ventsi
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Overview Paolo Bientinesi is Junior
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Other Activities Services Throughou
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Architectures. Accepted for publica
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Dissertations and Habilitations 453
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Social Software and Community Infor
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Personalized eHomes: Mobility, Priv
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Design Patterns for Safety-Critical
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Robust Machine Translation for Mult
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modeled together with its necessary
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Personalization in Technology Enhan
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A Log-Linear Discriminative Modelin
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Generic Modeling and Mapping Langua
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Evaluators: Prof. Dr. rer. nat. Ber
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Mechanisms, Models, and Tools for F
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Adaptive Multimodal Exploration of
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Discriminative Training and Acousti
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Channel Assignment and Security in
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Evaluators: Prof. Dr. Hermann Ney P
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for this problem the first polynomi
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Aspects of Wardrop Equilibria Lars
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Anonymous Communication in the Age
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World libraries : towards efficient
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On the Complexity of Equilibria in
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Energy-Efficient Design for Portabl
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Adaptable Transformation-Based Simi
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Finite Automata on Unranked Trees:
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Explicit checks are complemented by
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Central Services 501
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System Administration Group Staff
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The bandwidth increased significant
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What you can find in our library
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5. Bookcrossing: Since 2009, our li
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All these activities are made possi
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Co-operations 513
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Cluster of Excellence ”Ultra High
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The UMIC Workshop on Future Mobile
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UMIC Open Day 2010 The UMIC cluster
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Virtual Institute - High Productivi
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Bonn-Aachen International Center fo
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Graduiertenkollegs - Research Train
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Graduiertenkolleg ‘Software for M
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  The German University of Techno
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TGGS Thai-German Graduate School of
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Forum Information Technology at RWT
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Since January 2009, Bernhard Rumpe
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the framework of their respective p
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possible reseachs topics. This matr
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epresentation or, even better, real
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REGINA companies include world mark
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service integration capabilities ar
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