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

In den Vorträgen werden Vertreter der Informatik, Mathematik und Informationstechnik ausgewählte aktuelle Forschungs-arbeiten vorstellen und mit den DoktorandInnen vertiefen.

Spezielle Ziele dieser Lehrveranstaltung sind:

• Die HörerInnen sollen durch die Vorträge 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.
• 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.

Termine: jeweils, 17:00-18:00, HS 2

• 26.03.2014: Martin Pinzger: „A Tale of Experiments on Bug-Prediction„
• 02.04.2014: Patrick Horster: „Fibonacci, Catalan und die Informatik„
• 09.04.2014: Clemens Heuberger: „Efficient scalar Multiplication in Elliptic Curve Cryptography„
• 14.05.2014: Mathias Lux: „User Intentions in Multimedia“
• 28.05.2014: Kostyantyn Shchekotykhin: „Interactive debugging of knowledge bases“
• 11.06.2014: Hubert Zangl: „Smart Sensors and Actuators – An der Grenze zwischen digitaler und realer Welt“
• 25.06.2014: Christian Timmerer: „Adaptive Media Streaming – State Of The Art and Future Challenges“

Der Rückblick zum TEWI-Kolloquium von Ali El Essaili, M.Sc. am 12.02.2014 beinhaltet die Videoaufzeichnung sowie die Folien:

Video

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Slides

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 Abstract

There is a massive growth in mobile video consumption which outpaces the capacity improvements in next generation mobile networks. Specifically, mobile network operators face the challenge of allocating the scarce wireless resources while maximizing the user quality of experience (QoE). The first part of this talk addresses the main challenges in uplink distribution of user-generated video content over fourth generation mobile networks. The second part explores the benefit of QoE-based traffic and resource management in the mobile network in the context of adaptive HTTP downlink video delivery.

Short CV:

Ali El Essaili holds a Dipl-Ing. degree (2004) in Electrical Engineering from the Lebanese University and a M.Sc. degree (2006) in Communications Engineering from Technische Universität München (TUM). From April 2007 to February 2010, he was a software development engineer at General Motors. Since March 2010, he is pursuing his Ph.D. degree at the Institute for Media Technology at TUM as a member of the research and teaching staff. His current research interests are in the area of mobile multimedia, in particular multimedia signal processing and resource allocation.

Kurzfassung:

There is a massive growth in mobile video consumption which outpaces the capacity improvements in next generation mobile networks. Specifically, mobile network operators face the challenge of allocating the scarce wireless resources while maximizing the user quality of experience (QoE). The first part of this talk addresses the main challenges in uplink distribution of user-generated video content over fourth generation mobile networks. The second part explores the benefit of QoE-based traffic and resource management in the mobile network in the context of adaptive HTTP downlink video delivery.

Kurzbiographie:

Ali El Essaili holds a Dipl-Ing. degree (2004) in Electrical Engineering from the Lebanese University and a M.Sc. degree (2006) in Communications Engineering from Technische Universität München (TUM). From April 2007 to February 2010, he was a software development engineer at General Motors. Since March 2010, he is pursuing his Ph.D. degree at the Institute for Media Technology at TUM as a member of the research and teaching staff. His current research interests are in the area of mobile multimedia, in particular multimedia signal processing and resource allocation.

Abstract:
Elektronische Signaturen und elektronische Zustellung sind Eckpfeiler in E-Government Prozessen. Anhand eines typischen Prozesses wird deren prinzipieller Einsatz beschrieben. Sowohl bei elektronischen Signaturen als auch bei der elektronischen Zustellung wird der momentan Status und die aktuelle Umsetzung behandelt. Abschließend befasst sich der Vortrag mit aktuellen Problemstellungen und Lösungen speziell im grenzüberschreitenden Kontext.

Short-Bio:
Klaus Stranacher ist Mitarbeiter am E-Government Innovationszentrum und spezialisiert auf die Themenbereiche elektronische Signaturen, E-Government Prozesse und elektronische Dokumente. Er ist zuständig für die österreichischen Module für Online-Applikationen (MOA) zur Identifikation, Signaturerstellung und -prüfung. Weiters hat er an einigen EU-weiten Projekten im Bereich grenzüberschreitender Interoperabilität teilgenommen (eGov-Bus, STORK, SPOCS, etc.). Im Projekt SPOCS hat er das Arbeitspaket „Elektronische Dokumente“ geleitet. Klaus Stranacher ist auch Autor vieler wissenschaftlicher Publikationen.

Einladung zur Antrittsvorlesung:

Antritt Elmenreich 13

Software Product Lines (SPLs) are families of related software systems whose members offer different combinations of features. SPL practices have proven extensive economical and technological benefits and are becoming more pervasive in domains where systematic and disciplined software reuse is fundamental to keep up with customer demands. Consequently, SPL testing has received increasing attention both by researchers and practitioners whose main challenge is how to effectively and efficiently cope with the typically large number of feature combinations. In this talk, I will present an overview of how Search Based techniques have been deployed to tackle this problem, describe some of our ongoing work on combinatorial interaction testing and lay out some open questions that are venues for further research or collaboration.

Dr. Roberto Erick Lopez-Herrejon is currently a Lise Meitner Fellow (2012-2014) sponsored by the Austrian Science Fund (FWF) at the Johannes Kepler University in Linz Austria . Additionally, since 2008 he is an External Lecturer at the Software Engineering Masters Programme of the University of Oxford, England. From 2010-2012 he held an FP7 Intra-European Marie Curie Fellowship on a project for consistency and composition of variable systems with multi-view models.  He obtained his PhD from the University of Texas at Austin in 2006, funded in part by a Fulbright Fellowship sponsored by the U.S. State Department. From 2005 to 2008, he was a Career Development Fellow at the Software Engineering Centre of the University of Oxford sponsored by Higher Education Founding Council of England (HEFCE). His expertise is software product lines, variability management, feature oriented software development, model driven software engineering, and consistency checking.

Energy Harvesting (EH) is a new paradigm in Wireless Sensor Networks (WSNs): sensor nodes are powered by energy harvested from the ambient, rather than by non-rechargeable batteries, thus enabling a potentially perpetual operation of the WSN. However, Energy Harvesting poses new challenges in the design of WSNs, in that energy availability is random and fluctuates over time, thus calling for radically different energy management solutions. In this talk we investigate the following fundamental question: how should the harvested energy be managed to ensure optimal performance? First, we consider a sensor powered by EH which senses data of varying importance and reports them judiciously to a Fusion Center. Assuming that data transmission incurs an energy cost, our objective is to identify low-complexity policies that achieve close-to-optimal performance, in terms of maximizing the average long-term importance of the reported data. We first consider schemes that rely on the assumption of perfect knowledge of the amount of energy available in the battery. Subsequently, we investigate the design of operation policies that maximize the long-term reward under imperfect knowledge of the State-Of-Charge (SOC). Moreover, for both scenarios, we explore the impact of time-correlation in the EH process, showing that simple adaptation to the state of the EH process yields close-to-optimal performance, without requiring full knowledge of the SOC of the battery.

Michele Zorzi is a Professor at the Department of Information Engineering of the University of Padova. Prior to his current appointment, he was employed at the Politecnico di Milano, the University of Ferrara and the University of California at San Diego, with which he still has an active collaboration. He is an IEEE Fellow. His main research interests are in the area of wireless communications and networking, sensor networks and IoT, underwater communications and networks, cognitive networking, and energy-efficient protocol design. His work is widely cited, with a total of more than 11000 citations and an h-index of 52.