Monday, March 24, 2014

PostDoc position (3 years) at Alpen-Adria-Universität Klagenfurt, Austria

Institute of Information Technology, Multimedia Communication (MMC) Group
(Prof. Hermann Hellwagner) 

The MMC group at Klagenfurt University, Austria, is offering a full, three-year PostDoc position (available now) in a basic research project called CONCERT ( Important facts about the project are given in the following. We seek candidates with strong expertise in one or several of the following areas: Multimedia Communication, Machine Learning, Multi-Agent Systems, Uncertainty in Artificial Intelligence (Probabilistic Models, Bayesian Networks, Game Theory). Applications should be sent to Prof. Hermann Hellwagner <>.

Title: A Context-Adaptive Content Ecosystem Under Uncertainty (CONCERT)
Duration: 3 years

  • University College London (UK): Prof. George Pavlou, Dr. Wei Chai (Coordinator)
  • University of Surrey (UK): Dr. Ning Wang
  • Ecole Polytechnique Fédérale de Lausanne (CH): Prof. Pascal Frossard
  • Alpen-Adria-Universität (AAU) Klagenfurt (AT): Prof. Hermann Hellwagner 
Project character and funding

CONCERT is an international basic research project accepted as a CHIST-ERA project under the Call for Proposals “Context- and Content-Adaptive Communication Networks”. CHIST-ERA is an ERANET consortium, part of the EC FP7 Programme “Future and Emerging Technologies (FET)” ( Funding is provided by the national basic research funding agencies, in Austria the FWF (Austrian Science Fund).


The objective of CONCERT is to develop a content ecosystem encompassing all rele- vant players which will be able to perform intelligent content and network adaptation in highly dynamic conditions under uncertainty. This ecosystem will have as basis emerging information-/content-centric networking technologies which support in- trinsic in-network content manipulation. The project will consider uncertainty aspects in the following two application domains: (1) social media networks based on user generated content and (2) CDN-like professional content distribution (Content Distri- bution Networks). Three dimensions of uncertainties will be addressed: (1) heteroge- neous and changing service requirements by end users, (2) threats that may have adverse impacts on the content ecosystem, as well as (3) opportunities that can be exploited by specific players in order to have their costs reduced.

In order to manage and exploit the uncertainty aspects, CONCERT defines a two- dimensional content and network adaptation framework that operates both cross- layer and cross-player. First, the decision on any single adaptation action needs to take into account context information from both the content application layer and the underlying network. Second, we consider joint content and network adaptation in order to simultaneously achieve optimised service performance and network re- source utilisation. Finally, some complex uncertainty scenarios require coordinated content and network adaptation across different ecosystem players. In this case, in- consistent or even conflicting adaptation objectives and different levels of context knowledge need to be reconciled and are key research issues.

In order to achieve adaptation solutions capable of coping with different uncertain- ties, the project will develop advanced learning, decision-making and negotiation techniques. Learning is required for deriving accurate system behavioural patterns according to the acquired context knowledge. This will then drive decision-making functions for taking the most appropriate adaptation actions to address these uncer- tainties. Negotiation techniques are required for resolving potential tussles between specific content/network adaptation objectives by different players in the content ecosystem. The project will consider both centralised and distributed approaches in which learning and decision-making processes on adaptation actions can be per- formed either at the central adaptation domain controller or in a decentralised man- ner across multiple network elements. In the latter case, emerging information- /content-centric networks will become much more intelligent, with content-aware devices performing self-adaptation according to their own context knowledge but through coordination in order to achieve global near-optimality and stability.

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