Ringvorlesung Informatik und Informationstechnik SS2012

Die Ringvorlesung Informatik wendet sich an DissertantInnen, an angehende DissertantInnen (derzeit DiplomandInnen), an alle interessierten MitarbeiterInnen der Forschungsgruppen der Informatik und Informationstechnik sowie allgemein an aktueller Informatik-Forschung interessierte Personen.

In acht Vorträgen (Horster, Elmenreich, Timmerer, Bollin, Liddle, Ahlström, Bettstetter und Kyamakya) werden Vertreter der Informatik und Informationstechnik ausgewählte aktuelle Forschungsarbeiten vorstellen und mit den DoktorandInnen vertiefen.

Ziele:

  • Die HörerInnen sollen Ein- und Überblicke zu aktuellen Forschungsfragen, -methoden und -projekten in der Informatik und Informationstechnik erhalten.
  • Die DissertantInnen sollen ihren Standort in ihrem eigenen Dissertationsvorhaben bestimmen, d.h. sich ihr(e) Forschungsgebiet, -fragen, -ziele und -methoden klar machen und dokumentieren.
  • Die DissertantInnen sollen Querbezüge zu einem der in den Vorträgen dargestellten „fremden“ Forschungsgebiete identifizieren, Anknüpfungspunkte und möglichen Nutzen herausarbeiten, Kontakt zu dem entsprechenden Vortragenden herstellen, die Querbezüge mit ihm diskutieren und in Form der Bearbeitung eines kleinen „Projekts“ vertiefen.
  • Die DissertantInnen sollen all dies (Dissertationsvorhaben, Standort, Querbezüge und möglicher Nutzen, „Projekte“ und Ergebnisse bzw. Erkenntnisse daraus) abschließend den anderen DissertantInnen und den Vortragenden präsentieren und mit ihnen darüber diskutieren.
  • Damit sollen letztlich die beteiligten Forschungsgruppen einander besser kennenlernen, die Kontakte intensiviert, Querbezüge identifiziert und mögliche Kooperationen initiiert werden können. Die DissertantInnen sollen erkennen, ob/dass sie in anderen Forschungsgruppen Unterstützung bekommen können.

Themen:

 

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Rückblick: Mobile Visual Search [VIDEO, SLIDES]

Der Rückblick zum TEWI-Kolloquium von Oge Marques, Florida Atlantic University am 24.01.2012 beinhaltet die Videoaufzeichnung sowie die Folien:

Video

[iframe height=“350″ src=“http://video.aau.at/video.php?video=ftf_marques.mp4″]

Slides

Abstract

Mobile Visual Search (MVS) is a fascinating research field with many open challenges and opportunities which have the potential to impact the way we organize, annotate, and retrieve visual data (images and videos) using mobile devices. This talk is structured in four parts:

(i) MVS — opportunities: where I present recent and relevant numbers of the mobile computing market, particularly in the field of photography apps, social networks, and mobile search.

(ii) Basic concepts: where I explain the basic MVS pipeline and discuss the three main MVS scenarios and associated challenges.

(iii) Advanced technical details: where I explain technical aspects of feature extraction, indexing, descriptor matching, and geometric verification, discuss the state of the art in these fields, and comment on open problems and research opportunities.

(iv) Examples and applications: where I show recent and significant examples of academic research (e.g., Stanford Product Search System) and commercial apps (e.g., Google Goggles, oMoby, kooaba) in this field.

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Rückblick: SPLAY – Distributed Systems Made Simple [VIDEO, SLIDES]

Der Rückblick zum TEWI-Kolloquium von Prof. Pascal Felber, Univ. Neuchatel, Schweiz am 19.01.2012 beinhaltet die Videoaufzeichnung sowie die Folien:

Video

[iframe height=“350″ src=“http://video.aau.at/video.php?video=ftf_felber.mp4″]

Slides

Abstract

This talk will present SPLAY, an integrated system that facilitates the design, deployment and testing of large-scale distributed applications. Unlike existing systems, SPLAY covers all aspects of the development and evaluation chain. It allows developers to express algorithms in a concise, simple language that highly resembles pseudo-code found in research papers. The execution environment has low overheads and footprint, and provides a comprehensive set of libraries for common distributed systems operations. SPLAY is freely available from http://www.splay-project.org/.

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Rückblick: Large-Scale Multimedia Exploration with Adaptive Similarity Measures [VIDEO, SLIDES]

Der Rückblick zum TEWI-Kolloquium von Christian Beecks, RWTH Aachen am 10.01.2012 beinhaltet die Videoaufzeichnung sowie die Folien:

Video

[iframe height=“350″ src=“http://video.aau.at/video.php?video=ftf_beecks.mp4″]

Slides

Abstract:

With the growing amount of images, videos, and music, the task to support users in exploring multimedia databases is of ever-increasing importance. That is why numerous content-based browsing approaches have been developed. They support users in searching and browsing for multimedia objects in an interactive and playful way. In terms of query performance, however, these browsing approaches are frequently limited to small-to-moderate size databases. The question of how to efficiently browse large-scale multimedia databases yet remains to be answered.

In this talk, I will provide an overview of efficient query processing techniques applicable to content-based browsing systems. To this end, I will first introduce the domain of adaptive distance-based similarity measures and show how to model image similarity in a flexible way. I will then present recent developments for efficient exploration query processing by means of similarity-based visualizations and metric indexing. Finally, I will show how to browse millions of multimedia objects in a few seconds.

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Mobile Visual Search

Abstract:  

Mobile Visual Search (MVS) is a fascinating research field with many open challenges and opportunities which have the potential to impact the way we organize, annotate, and retrieve visual data (images and videos) using mobile devices. This talk is structured in four parts:
(i) MVS — opportunities: where I present recent and relevant numbers of the mobile computing market, particularly in the field of photography apps, social networks, and mobile search.

(ii) Basic concepts: where I explain the basic MVS pipeline and discuss the three main MVS scenarios and associated challenges.

(iii) Advanced technical details: where I explain technical aspects of feature extraction, indexing, descriptor matching, and geometric verification, discuss the state of the art in these fields, and comment on open problems and research opportunities.

(iv) Examples and applications: where I show recent and significant examples of academic research (e.g., Stanford Product Search System) and commercial apps (e.g., Google Goggles, oMoby, kooaba) in this field.

Dr. Oge Marques is an Associate Professor and Associate Chairman in the Department of Computer and Electrical Engineering & Computer Science at Florida Atlantic University in Boca Raton, Florida. He is currently a guest professor with ITEC at Klagenfurt University. He received his Ph.D. in Computer Engineering from Florida Atlantic University in 2001, his Masters in Electronics Engineering from Philips International Institute / Eindhoven University of Technology (Eindhoven, NL) in 1989 and his Bachelor’s Degree in Electrical Engineering from UTFPR (Curitiba, Brazil), where he also taught for more than 10 years before moving to the USA. He has been teaching undergraduate and graduate students for more than 20 years. His research experience has been mostly in the fields of image processing and computer vision. He is the (co-) author of four books in these topics, including the recently released textbook „Practical Image and Video Processing Using MATLAB“ (Wiley-IEEE Press, 2011). He is a Senior Member of both the IEEE and the ACM.

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SPLAY: Distributed Systems Evaluation Made Simple

This talk will present SPLAY, an integrated system that facilitates the design, deployment and testing of large-scale distributed applications. Unlike existing systems, SPLAY covers all aspects of the development and evaluation chain. It allows developers to express algorithms in a concise, simple language that highly resembles pseudo-code found in research papers. The execution environment has low overheads and footprint, and provides a comprehensive set of libraries for common distributed systems operations. SPLAY is freely available from http://www.splay-project.org/.

CV: Pascal Felber received his M.Sc. and Ph.D. degrees in Computer Science from the Swiss Federal Institute of Technology. From 1998 to 2002, he has worked at Oracle Corporation and Bell-Labs (Lucent Technologies) in the USA. From 2002 to 2004, he has been an Assistant Professor at Institut EURECOM in France. Since October 2004, he is a Professor of Computer Science at the University of Neuchâtel, Switzerland, working in the field of dependable and distributed systems. He has published over 80 research papers in various journals and conferences.

 

 

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Large-Scale Multimedia Exploration with Adaptive Similarity Measures

With the growing amount of images, videos, and music, the task to support users in exploring multimedia databases is of ever-increasing importance. That is why numerous content-based browsing approaches have been developed. They support users in searching and browsing for multimedia objects in an interactive and playful way. In terms of query performance, however, these browsing approaches are frequently limited to small-to-moderate size databases. The question of how to efficiently browse large-scale multimedia databases yet remains to be answered.

In this talk, I will provide an overview of efficient query processing techniques applicable to content-based browsing systems. To this end, I will first introduce the domain of adaptive distance-based similarity measures and show how to model image similarity in a flexible way. I will then present recent developments for efficient exploration query processing by means of similarity-based visualizations and metric indexing. Finally, I will show how to browse millions of multimedia objects in a few seconds.

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Evolution, Kooperation und die Technik

Kurzfassung:

Selbstorganisierende Systeme findet man in vielen Bereichen wie zum Beispiel der Biologie, Chemie, Physik, Soziologie und Ökonomie. Als gemeinsamen Nenner findet man hier jeweils Agenten, welche durch einfaches Zusammenspiel im Gesamten ein robustes, leistungsfähiges System formen, welches komplexe Aufgaben lösen kann.

Solche Systeme sind typischerweise nicht über einen ursprünglichen Entwurf eines Systems hervorgegangen, sondern haben sich evolutionär entwickelt. Bemerkenswert ist auch der Anteil an kooperativem Verhalten, der in vielen Systemen – wie zum Beispiel in Insektenstaaten – zu finden ist ; hier gibt ein Agent oft einen persönlichen Vorteil zugunsten des Schwarms auf. Auch diese Entwicklung kann evolutionär erklärt werden.

In der Technik sind Methoden zum Erzeugen von selbstorganisierenden kooperativen Systemen interessant. Gerade durch die zunehmende Miniaturisierung und Vernetzung von Komponenten stoflen herkömmliche Entwurfs- und Steuermechanismen nämlich an ihre Grenze. In den Lakeside Labs wird daher im Rahmen von mehreren Projekten an der technischen Umsetzung von selbstorganisierenden Systemen geforscht.

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Festkolloquium für Univ. Prof. Dr. Winfried Müller

Aus Anlass der Emeritierung von Univ. Prof. Dr. Winfried Müller veranstaltet das Institut für Mathematik der Alpen-Adria-Universität Klagenfurt ein

Festkolloquium

am Freitag, dem 28. Oktober 2011, ab 14 Uhr im Raum z.1.09 (Zentralgebäude) der Alpen-Adria-Universität Klagenfurt, Universitätsstraße 65-67, 9020 Klagenfurt am Wörthersee

Programm:

14.00 Uhr: Begrüßung und Grußworte

14.30 Uhr: Univ. Prof. Dr. Harald Niederreiter, Österreichische Akademie der Wissenschaften und King Fahd University of Petroleum & Minerals, Saudi Arabien „Algebra und Kryptographie: eine glückliche Verbindung

16.00 Uhr: Univ. Prof. Dr. Dietmar Dorninger, Dekan der Fakultät für Mathematik und Geoinformation der TU Wien und Ao. Univ. Prof. i. R. Dr. Hermann Kautschitsch, Alpen-Adria-Universität Klagenfurt „Winfried Müller: Unser Weggefährte an der TU Wien und an der Universität Klagenfurt

anschließend Imbiss und Erfrischungen

 

Um Anmeldung wird bis 21.10.2011 gebeten an:

Frau Anita Wachter, Bakk.a phil.
Institut für Mathematik, Alpen-Adria-Universität Klagenfurt
Universitätsstraße 65-67, 9020 Klagenfurt am Wörthersee
Tel. ++43 (0) 463 2700 3103, Fax. ++43 (0) 463 2700 3199
anita.wachter@uni-klu.ac.at

Hinweise zur Anfahrt finden Sie unterhttp://www.uni-klu.ac.at/lage/inhalt/231.htm

Informationen zu Übernachtungsmöglichkeitenhttp://www.klagenfurt-tourismus.at

 

 

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Analysis of Wireless Networks with General Node Distribution

Lakeside Labs / TEWI Colloquium:

Prof. Dr. Martin Haenggi: „Analysis of Wireless Networks with General Node Distribution“

The analysis of large wireless systems relies on a spatial model
for the node distribution. Such spatial modeling has been largely
restricted to the Poisson point process (PPP), since its
attractive analytical properties permit the derivation of
closed-form expressions for the interference distribution, outage
probabilities, and the spatial throughput. The Poisson model,
however, is only accurate if all nodes form a PPP and ALOHA is
used as the MAC protocol. Hence, in many cases, the locations of
the transmitters are better modeled by clustered or hard-core
models. After reviewing the most important results for the
Poisson case, we discuss novel analytical techniques that permit
extensions to general stationary point processes.

Haenggi.pdf

 

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