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Mobile Systems

MiNEMA Panel
| Kohrt: Spectrum Regulation for Mobile Communication |
| Date | 21 October 2009 |
| Location | University of Klagenfurt, Lakeside Park B04 |
| Description | Dr. Klaus Kohrt, Independent Consultant, Germany |
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| Thurner: Economics as a self-organized evolutionary system |
| Date | 14 December 2009 |
| Location | University of Klagenfurt, Lakeside Park B04.1.114 |
| Description | Prof. Dr. Stefan Thurner, Medical University of Vienna
We propose a simple model of evolution dynamics and demonstrate it in a framework of economic dynamics. New goods and services are endogenously produced through combinations of existing goods. As soon as new goods enter the market they may compete against already existing goods, in other words new products can have destructive effects on existing goods. As a result of this competition existing goods may be driven out from the market - often causing cascades of secondary defects (Schumpeterian gales of destruction). The model leads to generic dynamics characterized by phases of relative economic stability followed by phases of massive restructuring of markets -- which could be interpreted as Schumpeterian business cycles. Model timeseries of product diversity and productivity reproduce several stylized facts of economics timeseries on long timescales such as GDP or business failures, including non-Gaussian fat tailed distributions, volatility clustering etc. The model is phrased in an open, non-equilibrium setup which can be understood as a self organized critical system. Its diversity dynamics can be understood by the time-varying topology of the active production networks.
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| Schreier: Academic career paths in Australia and the US |
| Date | July 20, 2009, 16:00 |
| Location | University of Klagenfurt, Lakeside Park B04.1.114 |
| Description | Dr. Pete Schreier talks about academic career paths at universities in Australia and the US, from being a doctoral student to obtaining a professorship. It will be discussed what is good and what is bad, based on his personal experiences and observations in Germany, the US, and Australia.
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| Further information |
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| De Meer: Towards Modelling of Self-Organizing Systems |
| Date | November 30, 2007, 11:00 |
| Location | Universität Klagenfurt, E.1.42 |
| Description | Prof. Hermann De Meer (Universität Passau) Self-organizing systems are typically characterized as being decentrally self-managed based on autonomous components. Typically, there is also a reference to complex systems and an emergence of global structure based on local interactions between components. Some exchanges of information with the environment that may even lead to an evolutionary change. While broad consensus may be achievable about the attractiveness of such a concept for characterizing complex systems, there is a clear lack of formal methods and modelling techniques as a prerequisite for a constructive usage. It is our goal to investigate mathematical modelling techniques for a more comprehensive description of the processes triggering self-organization towards the ultimate purpose of algorithmic and constructive applicability in a more technical setting. |
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| Vilzmann: Medienzugriff mal anders |
| Date | Jun 18, 2007 |
| Organizer | Mobile Systems Group |
| Description | Robert Vilzmann (TU München)
Selbstorganisierende drahtlose Netze leben von der direkten Vernetzung mobiler Geräte, in gleichem Maße stören sich diese Geräte jedoch auch gegenseitig. Die Vermeidung dieser Vielfachzugriffsinterferenz ist Aufgabe der Medienzugriffskontrolle. Interferenz kann jedoch auch durch geeignete Empfangssignalverarbeitung unterdrückt werden, insbesondere durch Mehrnutzerdetektion. In diesem Vortrag wird ein Medienzugriffsverfahren vorgestellt, dessen primäre Aufgabe nicht die Vermeidung, sondern das "Management" von Interferenz ist. Ausgangspunkt sind dabei die prinzipielle Funktionsweise der Mehrnutzerdetektion und die sich daraus ergebenden Anforderungen für den Medienzugriff. Eine genauere Analyse des Verfahrens berücksichtigt auch Fälle, in denen nicht alle Geräte des Kommunikationsnetzes über ein gleichermaßen komplexe Empfangssignalverarbeitung verfügen. |
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| Hagenauer: Informationstheorie und Genetik |
| Date | June 05, 2007 , 17:45-19:15 |
| Location | University of Klagenfurt |
| Organizer | Institute of Networked and Embedded Systems |
| Description | Univ.-Prof. Dr.-Ing. Dr.-Ing. e.h. i.R. Joachim Hagenauer (TU München)
Bereits Shannon hat seine Dissertation über „Genetics“ verfasst, Genetik damals allerdings im Mendelschen Sinn. Wir sind der Überzeugung, dass Informations- und Codierungstheoretiker die aus der Technik bekannten Methoden auf den in der DNA niedergelegten und nun weitgehend bekannten genetischen Code anwenden sollte. Wir haben bisher Konzepte wie Entropie, “Mutual Information” and Informationsdistanz auf die DNA-Sequenz angewandt. Mit der Transinformation modellieren wir die Informations-übertragung von genetischen Defekten in der DNA zu Krankheiten wie Schizophrenie. Es werden klinische Daten verwendet um genetische Abweichungen in den so genannten “Single Nucleotide Polymorphism (SNPs)“ möglichen Krankheiten zuzuordnen. Verwendet wurden im Internet verfügbare DNA-Sequenzen um die Shannonsche Selbst- und Transinformation mithilfe bekannter Kompressionsalgorithmen wie „context tree weighting“, DNA-Compress und PPM. Eine entropiebasierte Metrik dient zur Klassifizierung und zur Erzeugung phylogenetischer Bäume von Menschen und Säugetieren. Überaschenderweise erhielten wir mit diesem „naiven“ Ansatz die gleichen Abstammungsbaume, wie sie Genbiologen mit anderen Methoden fanden. Die gleichen Methoden lassen sich auch zur Klassifizierung von Texten und Sprachen anwenden.
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| Barros: Wireless Information-Theoretic Security |
| Date | Jan 30, 2007 |
| Organizer | Mobile Systems Group |
| Description | Professor Dr. João Barros (University of Porto) |
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| Vehicular Ad Hoc Networking for Advanced Telematics Services |
| Date | July 11-15, 2005 |
| Location | University of Klagenfurt |
| Organizer | Panel discussion at MINEMA Summer School |
| Description | Technologies for ad hoc networking will enable car companies to include new safety and communication features into their cars. For example, highly efficient accident warnings are possible: Cars involved in an accident can send warning messages back over a defined number of other vehicles, thus avoiding motorway pileups. We could also envision person-to-person applications using ad hoc communication between vehicles (e.g., simple text messaging, game communities, or even hop-by-hop telephony).
The goal of this panel is to discuss potential and feasible applications, technology and research challenges, visions, roadmaps, and risks of such scenarios. Each of the panelists will give a 5-10 minute statement, followed by a 20-minute discussion with questions from the audience.
Moderator and Organizer:
Panelists:
- Hannes Hartenstein (University of Karlsruhe, Germany)
- Jean-Pierre Hubaux (EPFL, Lausanne, Switzerland)
- Timo Kosch (BMW Research and Technology, Munich, Germany)
- Kirsten Matheus (CarMeq, Berlin, Germany)
- Charles E. Perkins (Nokia Research, Mountain View, USA)
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