- Kolloq - lists.ibr.cs.tu-bs.de

Erinnerung: Vortrag am 13.08.2013, 10:00 Uhr
by Informatik-Kolloquium 12 Aug '13

12 Aug '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem Vortrag ein. Prof. Dr. Joachim M. Buhmann, ETH Zürich, Lehrstuhl für Information Science & Engineering: Big Data: where is the information Beginn: 13.08.2013, 10:00 Uhr Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23, Galeriegeschoss, Raum G04 Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-08-13-buhmann.html Kontakt: Prof. Dr.-Ing. F. M. Wahl The digital revolution has created unprecedented opportunities in computing and communication but it also has generated the data deluge with an urgent demand for new pattern recognition technology. Learning patterns in data requires to extract interesting, statistically significant regularities in (large) data sets, e.g. the identification of connection patterns in the brain (connectomics) or the detection of cancer cells in tissue microarrays and estimating their staining as a cancer severity score. Admissible solutions or hypotheses specify the context of pattern analysis problems which have to cope with model mismatch and noise in data. An information theoretic approach is developed which estimates the precision of inferred solution sets and regularizes solutions in a noise adapted way. The tradeoff between "informativeness" and "robustness" is mirrored by the balance between high information content and identifiability of solution sets, thereby giving rise to a new notion of context sensitive information. Cost function to rank solutions and, more abstractly, algorithms are considered as noisy channels with an approximation capacity. The effectiveness of this concept is demonstrated by model validation for spectral clustering based on different variants of graph cuts. The concept also enables us to measure how many bit are extracted by sorting algorithms when the input and thereby the pairwise comparisons are subject to fluctuations.

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Vortrag am 13.08.2013, 10:00 Uhr
by Informatik-Kolloquium 30 Jul '13

30 Jul '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem Vortrag ein. Prof. Dr. Joachim M. Buhmann, ETH Zürich, Lehrstuhl für Information Science & Engineering: Big Data: where is the information Beginn: 13.08.2013, 10:00 Uhr Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23, Galeriegeschoss, Raum G04 Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-08-13-buhmann.html Kontakt: Prof. Dr.-Ing. F. M. Wahl The digital revolution has created unprecedented opportunities in computing and communication but it also has generated the data deluge with an urgent demand for new pattern recognition technology. Learning patterns in data requires to extract interesting, statistically significant regularities in (large) data sets, e.g. the identification of connection patterns in the brain (connectomics) or the detection of cancer cells in tissue microarrays and estimating their staining as a cancer severity score. Admissible solutions or hypotheses specify the context of pattern analysis problems which have to cope with model mismatch and noise in data. An information theoretic approach is developed which estimates the precision of inferred solution sets and regularizes solutions in a noise adapted way. The tradeoff between "informativeness" and "robustness" is mirrored by the balance between high information content and identifiability of solution sets, thereby giving rise to a new notion of context sensitive information. Cost function to rank solutions and, more abstractly, algorithms are considered as noisy channels with an approximation capacity. The effectiveness of this concept is demonstrated by model validation for spectral clustering based on different variants of graph cuts. The concept also enables us to measure how many bit are extracted by sorting algorithms when the input and thereby the pairwise comparisons are subject to fluctuations.

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Erinnerung: Vortrag am 15.07.2013, 13:30 Uhr
by Informatik-Kolloquium 14 Jul '13

14 Jul '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem Vortrag ein. Prof. Dr. Klara Nahrstedt, University of Illinois at Urbana-Champaign, Department of Computer Science: Characterizing and Leveraging People Movement via Joint WiFi/Bluetooth Sensing Beginn: 15.07.2013, 13:30 Uhr Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23, 1. OG, Hörsaal M 161 Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-07-15-nahrstedt.html Kontakt: Prof. Dr. Wolf-Tilo Balke Alle Zuhörer sind eingeladen, sich bereits 20 Minuten vor dem Vortrag zu gemeinsamem Kaffee und Kuchen einzufinden. Collecting real human movements has drawn significant attention from research community. The reasons are multiple, including new insights in network protocol design, network management within urban planning, and environmental impact. However, obtaining comprehensive trace of people movement with integrated context information about location, contacts and stay duration has been missing and it proves to be a hard task. In this talk we present a novel framework, which includes two major components: the UIM (University of Illinois Movement) sensing component and the Joytish context-analysis component. This framework includes (a) scanning process of joint location information (via WiFi scanner) and ad hoc contacts (via Bluetooth scanner) of human movement at the University of Illinois campus using Google Android phones, and (b) trace analysis algorithm of joint Bluetooth/WiFi information with its context inference towards characterization of people mobility patterns. This framework then enables us to deploy an efficient data dissemination protocol which uses both WiFi access point and ad hoc Bluetooth contact information to expedite the data forwarding. Our results show that we can characterize the detailed regularity of people movement, the visit duration of people at certain locations, and the popularity of locations. The evaluation of our dissemination protocol shows strong improvement of data forwarding delays when compared with other state-of-the-art protocols. We will conclude the talk with a short discussion of challenges when it comes to mobility patterns of different user groups and of needs for characterizing and understanding people movement patterns in different scenarios if we aim to deploy effective protocols and services on future mobile hand-held devices. Klara Nahrstedt is a full professor at the University of Illinois at Urbana-Champaign, Computer Science Department. Her research interests are directed toward multimedia mobile systems, quality of service (QoS) management in mobile networks, QoS-aware resource management, 3D tele-immersive systems and networks, and real-time security in mission-critical systems. She is the co-author of widely used multimedia books `Multimedia: Computing, Communications and Applications' published by Prentice Hall, and Multimedia Systems published by Springer Verlag. She is the recipient of the IEEE Communication Society Leonard Abraham Award for Research Achievements, Ralph and Catherine Fisher Professor chair, University Scholar, Humboldt Award, and the former chair of ACM SIG Multimedia. She was the general chair of ACM Multimedia 2006, general chair of ACM NOSSDAV 2007 and the general chair of IEEE Percom 2009. Klara Nahrstedt received her Diploma in Mathematics from Humboldt University, Berlin, Germany in numerical analysis in 1985. In 1995 she received her PhD from the University of Pennsylvania in the Department of Computer and Information Science. She is the ACM Fellow and IEEE Fellow.

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Terminaenderung: Vortrag am 15.07.2013, 13:30 Uhr
by Informatik-Kolloquium 12 Jul '13

12 Jul '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem Vortrag ein. Prof. Dr. Klara Nahrstedt, University of Illinois at Urbana-Champaign, Department of Computer Science: Characterizing and Leveraging People Movement via Joint WiFi/Bluetooth Sensing Beginn: 15.07.2013, 13:30 Uhr Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23, 1. OG, Hörsaal M 161 Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-07-15-nahrstedt.html Kontakt: Prof. Dr. Wolf-Tilo Balke Alle Zuhörer sind eingeladen, sich bereits 20 Minuten vor dem Vortrag zu gemeinsamem Kaffee und Kuchen einzufinden. Collecting real human movements has drawn significant attention from research community. The reasons are multiple, including new insights in network protocol design, network management within urban planning, and environmental impact. However, obtaining comprehensive trace of people movement with integrated context information about location, contacts and stay duration has been missing and it proves to be a hard task. In this talk we present a novel framework, which includes two major components: the UIM (University of Illinois Movement) sensing component and the Joytish context-analysis component. This framework includes (a) scanning process of joint location information (via WiFi scanner) and ad hoc contacts (via Bluetooth scanner) of human movement at the University of Illinois campus using Google Android phones, and (b) trace analysis algorithm of joint Bluetooth/WiFi information with its context inference towards characterization of people mobility patterns. This framework then enables us to deploy an efficient data dissemination protocol which uses both WiFi access point and ad hoc Bluetooth contact information to expedite the data forwarding. Our results show that we can characterize the detailed regularity of people movement, the visit duration of people at certain locations, and the popularity of locations. The evaluation of our dissemination protocol shows strong improvement of data forwarding delays when compared with other state-of-the-art protocols. We will conclude the talk with a short discussion of challenges when it comes to mobility patterns of different user groups and of needs for characterizing and understanding people movement patterns in different scenarios if we aim to deploy effective protocols and services on future mobile hand-held devices. Klara Nahrstedt is a full professor at the University of Illinois at Urbana-Champaign, Computer Science Department. Her research interests are directed toward multimedia mobile systems, quality of service (QoS) management in mobile networks, QoS-aware resource management, 3D tele-immersive systems and networks, and real-time security in mission-critical systems. She is the co-author of widely used multimedia books `Multimedia: Computing, Communications and Applications' published by Prentice Hall, and Multimedia Systems published by Springer Verlag. She is the recipient of the IEEE Communication Society Leonard Abraham Award for Research Achievements, Ralph and Catherine Fisher Professor chair, University Scholar, Humboldt Award, and the former chair of ACM SIG Multimedia. She was the general chair of ACM Multimedia 2006, general chair of ACM NOSSDAV 2007 and the general chair of IEEE Percom 2009. Klara Nahrstedt received her Diploma in Mathematics from Humboldt University, Berlin, Germany in numerical analysis in 1985. In 1995 she received her PhD from the University of Pennsylvania in the Department of Computer and Information Science. She is the ACM Fellow and IEEE Fellow.

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Vortrag am 15.07.2013, 15:00 Uhr
by Informatik-Kolloquium 10 Jul '13

10 Jul '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem Vortrag ein. Klara Nahrstedt, University of Illinois at Urbana-Champaign, Department of Computer Science: Characterizing and Leveraging People Movement via Joint WiFi/Bluetooth Sensing Beginn: 15.07.2013, 15:00 Uhr Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23, Raum 161 Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-07-15-nahrstedt.html Kontakt: Prof. Dr. Wolf-Tilo Balke Alle Zuhörer sind eingeladen, sich bereits 20 Minuten vor dem Vortrag zu gemeinsamem Kaffee und Kuchen einzufinden.

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Vortrag am 15.07.2013, 15:00 Uhr
by Informatik-Kolloquium 10 Jul '13

10 Jul '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem Vortrag ein. Klara Nahrstedt, University of Illinois at Urbana-Champaign, Department of Computer Science: Characterizing and Leveraging People Movement via Joint WiFi/Bluetooth Sensing Beginn: 15.07.2013, 15:00 Uhr Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23, Raum 161 Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-07-15-nahrstedt.html Kontakt: Prof. Dr. Wolf-Tilo Balke Alle Zuhörer sind eingeladen, sich bereits 20 Minuten vor dem Vortrag zu gemeinsamem Kaffee und Kuchen einzufinden.

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Erinnerung: Vortrag am 24.06.2013, 15:00 Uhr
by Informatik-Kolloquium 23 Jun '13

23 Jun '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem Vortrag ein. Dr. Corrado Guarino Lo Bianco, University of Parma, Dip. di Ing. dell'Informazione: An overview on the real-time trajectory planning problem: known techniques and recent advances Beginn: 24.06.2013, 15:00 Uhr Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23, Galeriegeschoss, Raum G04 Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-06-24-bianco.html Kontakt: Prof. Dr.-Ing. F. M. Wahl The performances of feedback control systems change depending on the characteristics of the reference signals. For this reason, robot trajectories have always been designed by paying attention to their smoothness. Originally, trajectories were only synthesized offline, and the smoothness requirement was achieved by exclusively taking care of some continuity aspects (velocity and acceleration continuity). Planners have evolved along the years, so that, still in an offline context, the subsequent generations were also able to account for the existence of physical limits concerning the system kinematics/dynamics, while, in more recent approaches, trajectories are also planned by optimizing some given performance indexes. A relevant limitation of the aforementioned approaches is represented by their intrinsic offline nature: trajectories cannot be modified online, so that control systems cannot suddenly react to possible environmental changes. This has originated an increasing interest on planners that are able to generate, in an online context, optimal constrained trajectories. The seminar will propose an overview on some known online planning techniques, by describing their main characteristics and by providing some possible classifications. The attention will then be addressed to a planner that has been recently designed in the Robotic Lab of the University of Parma. It is based on a variable structure sliding mode control scheme, which behavior will be analyzed with the aid of some simulation experiments. The proposed generator can also be used in contexts that are totally different from those for which it was originally conceived. For example, it has been recently used to solve several online trajectory scaling problems for systems subject to physical constraints. Some videos will show the performances that have been achieved on some actual manipulators.

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Erinnerung: Vortrag am 21.06.2013, 13:00 Uhr
by Informatik-Kolloquium 20 Jun '13

20 Jun '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem Vortrag ein. Prof. Shuqian Luo, Capital Medical University, Beijing, China, Professor, Director of Medical Imaging Lab: X-ray Phase Contrast Imaging and Its Medical Application Beginn: 21.06.2013, 13:00 Uhr Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstrße 23, 4. Obergeschoss, Raum 404 Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-06-21-luo.html Kontakt: Prof. Reinhold Haux Alle Zuhörer sind eingeladen, sich nach dem Vortrag bei gemeinsamem Kaffee und Kuchen einzufinden. Phase contrast imaging (PCI) technique has recently been developed to provide high contrast images by using phase shift of the X-ray. When X-ray propagates through an object, both the amplitude and the phase of the wave are modified. Conventional X-ray imaging is only sensitive to the variations in X-ray absorption. It is a difficult task for soft tissues and other weakly absorbing objects imaging because of the very small image contrast difference. Fortunately, the phase shift between biological soft tissues is almost one thousand times greater than the absorption term at photon energies greater than 10 keV. Phase contrast imaging can greatly improve the image quality of soft tissues. We present our research on information extraction , observation of microstructure and morphology of small animal organs and human tissues with PCI imaging, which has potential use for the early detection and diagnosis of some cancers.

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Erinnerung: Vortrag am 21.06.2013, 15:00 Uhr
by Informatik-Kolloquium 20 Jun '13

20 Jun '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem Vortrag ein. Karl-Heinz Brandl und Astrid Schmidt, IKT-Projekt ver.di-Bundesverwaltung Berlin: Berufseinstieg: Gehaltsstrukturen und Arbeitsbedingungen in der IT-Branche Beginn: 21.06.2013, 15:00 Uhr Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23, 1. OG, Hörsaal M 161 Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-06-21-brandl.html Kontakt: Prof. Dr. Wolf-Tilo Balke Alle Zuhörer sind eingeladen, sich bereits 20 Minuten vor dem Vortrag zu gemeinsamem Kaffee und Kuchen einzufinden. Der Berufseinstieg ist ein wesentlicher Schritt in die Arbeitswelt. Dabei geht es nicht nur darum, in welche Richtung man sich fachlich entwickeln möchte. Auch die Gestaltung der Rahmenbedingungen ist wichtig für gute Arbeit und Zukunftsperspektiven. Wir beleuchten Basics: Welche Gehaltsvorstellungen sind realistisch? Wie setzen sich Gehälter zusammen? Was sind die Vorteile von tarifvertraglichen Regelungen? Außerdem gehen wir auf Arbeitsmodelle und Anforderungen in der IT-Branche ein: Auf welche Herausforderungen muss ich mich vorbereiten? ver.di begleitet die Entwicklungen in der Branche schon seit Langem und hat u.a. mit den komplexen Haustarifverträgen bei IBM und T-Systems Standards gesetzt. Unsere Erfahrungen und unser Wissen teilen wir gerne.

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Erinnerung: Vortrag am 20.06.2013, 18:00 Uhr
by Informatik-Kolloquium 19 Jun '13

19 Jun '13

Die Dozenten der Informatik-Institute der Technischen Universität Braunschweig machen auf folgenden Vortrag der GI Regionalgruppe Braunschweig aufmerksam: Prof. Dr.-Ing. Karsten Lemmer, Leiter des Instituts für Verkehrssystemtechnik, Deutsches Zentrum für Luft- und Raumfahrt e.V., Braunschweig: GI-Vortrag: Was bewegt uns morgen? Forschung für die Mobilität der Zukunft Beginn: 20.06.2013, 18:00 Uhr Ort: Haus der Wissenschaft, Raum Veolia, Pockelsstraße 11 Webseite: http://www.lineas.de/gi-bs/ Kontakt: Anja Schaar-Goldapp, Sprecherin der GI Regionalgruppe BS Wie sieht unsere Mobilität heute aus? Welche negativen Effekte hat unsere Mobilität hinsichtlich Sicherheit und Umwelt? Wie verändert sich Mobilität? Fahren wir in Zukunft automatisch? Was kann das Auto von morgen? Der Vortrag skizziert die Mobilität von heute und zeigt Ansätze, wie die Mobilität der Zukunft erforscht wird. Als zentrales Forschungsinstrument wird die Anwendungsplattform Intelligente Mobilität (AIM) vorgestellt, die Nutzern aus Wissenschaft, Forschung, Entwicklung und Industrie die Untersuchung einer Vielzahl von Themen aus der gesamten Komplexität von Verkehr mit all seinen Wechselwirkungen ermöglicht.

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