Adresse und Kontakt

AG Netzbasierte Informationssysteme
FU Berlin
Königin-Luise-Straße 24-26
14195 Berlin

Tel.: +49-30-838-75221
Fax: +49-30-838-75220

This site is no longer maintained. You see a static copy as of April 1 2016.

Workshop Web-scale Knowledge Representation, Retrieval, and Reasoning @ IEEE WI/IAT

The World Wide Web has become the carrier for the largest human knowledge repository in history. As its knowledge bases are growing towards a practically ‘infinite’ volume, Web-scale Knowledge Representation, Retrieval, and Reasoning (Web-KR3) is becoming a real issue and an urgent task. Although the Web community has developed a number of knowledge representation languages and reasoning methods, when the volume goes Web-scale, existing approaches meet many challenging problems, such as scalability, inconsistency, uncertainty and dynamics. Hence, a unified approach to Web-KR3 needs to be developed.

The workshop aims to bringing together researchers from Web research, Artificial Intelligence (AI), high performance computing, cognitive science, knowledge management, and machine learning to discuss all issues of Web-KR3 in a synergistic setting. The workshop will be co-located with the 2011 IEEE/WIC/ACM International Conferences on Web Intelligence and Intelligent Agent Technology.

The call for papers is online at… [...Weiterlesen/more...]

Workshop proposal für WWW-Konferenz 2011 akzeptiert – Call for Papers

Das Workshop-Proposal mit dem Titel „Usage Analysis and the Web of Data“ (USEWOD) von Bettina Berendt (K.U. Leuven, Belgium),Laura Hollink (TU Delft, Netherlands), Vera Hollink (CWI Amsterdam, Netherlands), Markus Luczak-Rösch (FU Berlin, Networked Information Systems, Germany), Knud Möller (DERI/NUIG, Ireland) und David Vallet (Universidad Autónoma de Madrid, Spain) wurde für die WWW-Konferenz 2011 akzeptiert.

Ziel des Workshops ist es die SemanticWeb/Linked Data Community mit der Web Usage Mining Community zusammen zu bringen und interdisziplinäre Fragestellungen durch die Konvergenz dieser Forschungszweige zu erörtern.

Der Call for Papers ist zu erreichen unter Insbesondere sei auf die Data Challenge aufmerksam gemacht, die dazu aufruft, anhand eines Standarddatensatzes neuartige Experimente mit Nutzungsdaten zu präsentieren.… [...Weiterlesen/more...]

Paper accepted at SAKS 2011

The paper „Towards Swarm-based Federated Web Knowledgebases“ by Philipp Obermeier, Anne Augustin and Robert Tolksdorf has been accepted at the Workshop on Self-Organising, Adaptive, Context-Sensitive Distributed Systems (SAKS). Its abstract is

Nowadays internet knowledgebases are more and more described using ontological vocabularies. However, efficient coherent solutions for both federated storage and reasoning upon widely distributed web repositories are rarely explored.
To this end we present a self-organized, distributed storage and reasoning approach based on swarm intelligence exploiting the strong applicability of swarm algorithms to distributed environments. Our concept comprises two layers of swarm algorithms – storage and reasoning layer – for information storage and inference of new statements, respectively. We present for the former our concepts with first evaluation results and give for the latter a general swarm-based concept for forward-chaining assertional reasoning in the description logic ALC.


DigiPolis project publication accepted at SSWS2010 workshop

The DigiPolis project at AG NBI is developing a Self-organized Semantic Storage Service („S4“). A research paper written by NBI staff members Hannes Mühleisen, Tilman Walther, Anne Augustin and Marko Harasic under the supervision of Prof. Robert Tolksdorf describing the impact of various configuration parameters on this system was just accepted for the The 6th International Workshop on Scalable Semantic Web Knowledge Base Systems (SSWS2010) at the 9th International Semantic Web Conference (ISWC2010), Shanghai, China.
The publication is entitled „Configuring a Self-Organized Semantic Storage Service“, here the abstract:

Scalability requirements for semantic stores lead to distributed hardware-independent solutions to handle and analyze massive amounts of semantic data. We use a different approach by imitating the behaviour of swarm individuals to achieve this scalability. We have implemented our concept of a Self-organized Semantic Storage Service (S4) and present preliminary evaluation results in order to investigate to what extent the performance of a distributed and swarm-based storage system is dependent on its configuration.


Paper on entrepreneurship education at G-Forum 2010

At the 4. Forum Gründungsforschung – Interdisziplinäre Jahreskonferenz für die Gründungsforschung 21. – 22. Oktober 2010, Köln (G-Forum), NBI presents an analysis of its entrepreneurship teaching:

Robert Tolksdorf, Malgorzata Mochol, Stefanie Demmler. Wirkungen der praxisorientierten Entrepreneurshiplehre am Institut für Informatik der Freien Universität Berlin:

Das Fach Informatik bietet die Grundlage für viele innovative Gründungsprojekte. Im Gegensatz zu beispielsweise Life-Science-Gründungen ist bei IT-Vorhaben wenig Forschungsvorlauf und kein Investitionsbedarf in Labore oder Fabriken notwendig. Ist eine gute Idee vorhanden, so ist ihre Umsetzung in ein IT-Produkt oder eine IT-Dienstleistung oft eine Frage des Gründergeistes und vorhandener personeller Kapazität.

Die AG Netzbasierte Informationssysteme (AG NBI) am Institut für Informatik der Freien Universität Berlin verfolgt seit Jahren einen didaktischen Ansatz, praktisches Entrepreneurship-Know-How zu vermitteln. Ausgangspunkt dafür stellten Beobachtungen im Rahmen der Lehre und Forschung dar, dass die Studierenden der Bachelor-, Diplom- und Masterstudiengänge oft nebenher vielversprechende innovative Geschäftsideen entwickeln.

Von der AG NBI wurde eine Befragung mit dem Ziel durchgeführt, die Wirkungen der praxis- und handlungsorientierten Entrepreneurshiplehre insbesondere in Hinblick auf das Gründungsinteresse zu erheben, um so Hinweise für die Weiterentwicklung der didaktischen Konzeption zu erlangen.


NBI poster awarded at FIS 2010

The poster Robert Tolksdorf, Hannes Mühleisen, Kia Teymourian, Marko Harasic and Anne Augustin: Nature Inspired Self-Organizing Semantic Storage was selected as 2nd best poster at the Future Internet Symposium.… [...Weiterlesen/more...]

3rd Future Internet Symposium 2010 started

The Future Internet Symposium (FIS) is a venue for European and international researchers to share their work on next generation Internet technologies. FIS is a scientific forum for the European Union’s Future Internet Initiative, an effort to align European Internet research on the shared challenges presented by Europe’s increasingly Internet-based society and economy.… [...Weiterlesen/more...]

Xinnovations 2010 again a success

The Xinnovations were again a success in this year as reported in a summary:

Die Xinnovations 2010 fanden vom Offenheit und das Ringen um innovative Ansätze prägten auch in diesem Jahr die gerade zu Ende gegangenen Xinnovations 2010. In den mehr als 160 Referaten, Foren und Workshops ging es den rund 600 Teilnehmerinnen und Teilnehmern u. a. um Semantische Technologien, Datenschutz in Zeiten von Web 2.0, Digitale Justiz, Vernetztes Leben sowie Open Government und Open Data.


Two papers at GI INFORMATIK 2010

Two NBI papers have been accepted for the GI INFORMATIK 2010 conference. They are:

Robert Tolksdorf. “Towards Quality Measures for Web Network Extraction” at the Web Science Workshop.

Within the Web information networks of various kinds are of interest for specific applications. These networks evolve in a decentralised manner. As such, they represent alternatives to centralised information sources such as databases.

While crawlers can try to extract these networks from the Web, there is currently no systematic work on how to measure the quality of this extraction. Quality measures are of central importance to justify efforts and investments in Web network mining as an alternative to licence models of centralised information sources.

In this paper we present a use case of such an interesting information network, that of the art market. We then present a simple model of a quantifiable quality measure of network extracted from the Web.

Markus Luczak-Rösch, Gökhan Coskun, Adrian Paschke, Mario Rothe, Robert Tolksdorf. „SVoNt – Version Control of OWL Ontologies on the Concept Level“ at the Applications of Semantic Technologies – AST2010 Workshop.

Like in Software Engineering the development of ontologies in a team requires efficient support for the management of ontology versions. In


DigiPolis project publication accepted at iiWAS2010 conference

The DigiPolis project at AG NBI is developing a Self-organized Semantic Storage Service („S4“). A research paper written by NBI staff describing the swarm-based concepts behind this system was just accepted at the 12th International Conference on Information Integration and Web-based Applications & Services (iiWAS2010) in Paris, France.

The publication is titled „A Self-Organized Semantic Storage Service„, here just the abstract:

Traditional approaches for data storage and analysis are facing their limits when handling the enormous data amounts of today’s applications. We believe that a radical departure from contemporary architectures of stores is necessary to satisfy that central scalability requirement. One of the most promising new schools of thought in system design are swarm intelligent and swarm-based approaches for data distribution and organization. In this paper, we describe our current work on a swarm-based storage service for Semantic Web data. This storage service utilizes algorithms discovered in the behavior of ant colonies. We describe these algorithms and our enhancements to them as well as our evaluation of a prototypical implementation.
AG Netzbasierte Informationssysteme,
Königin-Luise-Straße 24-26, 14195 Berlin, Tel.: +49-30-838-75221, Fax: +49-30-838-75220