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Five AKSW Papers at ESWC 2014

March 14, 2014 - 1:37 am by AxelNgonga - No comments »
Hello World!
We are very pleased to announce that five of our papers were accepted for presentation at ESWC 2014. These papers range from natural-language processing to the acquisition of temporal data. In more detail, we will present the following papers:
  • NLP Data Cleansing Based on Linguistic Ontology Constraints (Dimitris Kontokostas, Martin Brummer, Sebastian Hellmann, Jens Lehmann and Lazaros Ioannidis)
  • Unsupervised Link Discovery Through Knowledge Base Repair (Axel-Cyrille Ngonga Ngomo, Mohamed Sherif and Klaus Lyko)
  • conTEXT – Lightweight Text Analytics using Linked Data (Ali Khalili, Sören Auer and Axel-Cyrille Ngonga Ngomo)
  • HiBISCuS: Hypergraph-Based Source Selection for SPARQL Endpoint Federation (Muhammad Saleem and Axel-Cyrille Ngonga Ngomo)
  • Hybrid Acquisition of Temporal Scopes for RDF Data (Anisa Rula, Matteo Palmonari, Axel-Cyrille Ngonga Ngomo, Daniel Gerber, Jens Lehmann and Lorenz Bühmann)
Come over to ESWC and enjoy the talks. More information on these publications at http://aksw.org/Publications.
Cheers,
Axel on behalf of AKSW

AKSW Colloquium “Current semantic web initiatives in the Netherlands” on Friday, March 14, Room P901

March 13, 2014 - 9:31 am by KonradHoeffner - No comments »

Current semantic web initiatives in the Netherlands: Heritage & Location, PiLOD 2.0

On Friday, March 14, at 10.00 a.m. in room P901, visiting researchers Tine van Nierop and Rein van ‘t Veer from the E&L will discuss, amongst several other semantic web initiatives in the Netherlands, two different projects: Heritage & Location (www.erfgoedenlocatie.nl) and PiLOD 2.0 (www.pilod.nl). Heritage & Location assembles linked geospatial data from all possible heritage institutions and discloses it in geotemporal semantic applications. PiLOD (Platform implementation Linked Open Data) is a sector-independent initiative for any institution or individual wanting to explore the possibilities of the semantic web.

About the AKSW Colloquium

This event is part of a series of events about Semantic Web technology. Please see http://wiki.aksw.org/Colloquium for further information about previous and future events. As always, Bachelor and Master students are able to get points for attendance and there is complimentary coffee and cake after the session.

AKSW Colloquium “Towards a Computer Algebra Semantic Social Network” on Monday, March 17

March 11, 2014 - 10:59 am by KonradHoeffner - No comments »

Towards a Computer Algebra Semantic Social Network

profile picture of Prof. Dr. Hans-Gert GräbeOn Monday, March 17th, 2014 at 1.30 – 2:30 p.m. in Room P702 (Paulinum), Prof. Dr. Hans-Gert Gräbe will present and discuss a bootstrap process for a Semantic Social Network within a special scientific community based on enhancements of xodx

For the moment we operate a SPARQL endpoint and extract valuable information to the WordPress based website of the German CA-Fachgruppe.

Additional Information

About the AKSW Colloquium

This event is part of a series of events about Semantic Web technology. Please see http://wiki.aksw.org/Colloquium for further information about previous and future events. As always, Bachelor and Master students are able to get points for attendance and there is complimentary coffee and cake after the session.

AKSW Colloquium with Lemon – Lexicon Model for Ontologies on Wednesday, February 26

February 7, 2014 - 3:01 pm by KonradHoeffner - No comments »

Lemon – Lexicon Model for Ontologies

On Wednesday, Feb 26th, 2014, at 1.30 – 4:00 p.m. in Room P702 (Paulinum).

Philipp CimianoPhilipp Cimiano is the head of the Semantic Computing Group at Bielefeld University. He is also affiliated with the Cognitive Interaction Technology Excellence Cluster. Before joining the University of Bielefeld, he was an assistant professor at Delft University of Technology (2008-2009) and a postdoctoral researcher at the Institute AIFB of Universität Kalsruhe (TH).

John McCrae

John McCrae is a post-doctoral researcher at the University of Bielefeld in Bielefeld, Germany. He is currently working in Prof. Philipp Cimiano’s group, AG Semantic Computing. His research interests include the following: Ontologies and the lexicon-ontology interface, Collaborative development and publishing of language resources, Linked data and the Semantic Web, Machine translation and multilingualism, Machine learning methods for NLP, Probabilistic inference.

Abstract

There are a large number of ontologies currently available on the Semantic Web. However, in order to exploit them within natural language processing applications, more linguistic information than can be represented in current Semantic Web standards is required. Further, there are a large number of lexical resources available representing a wealth of linguistic information, but this data exists in various formats and is difficult to link to ontologies and other resources. We present a model we call lemon that supports the sharing of terminological and lexicon resources on the Semantic Web as well as their linking to the existing semantic representations provided by ontologies. We demonstrate that lemon can succinctly represent existing lexical resources and in combination with standard NLP tools we can easily generate new lexica for domain ontologies according to the lemon model. We demonstrate that by combining generated and existing lexica we can collaboratively develop rich lexical descriptions of ontology entities. We also show that the adoption of Semantic Web standards can provide added value for lexicon models by supporting a rich axiomatization of linguistic categories that can be used to constrain the usage of the model and to perform consistency checks.

About the AKSW Colloquium

This event is part of a series of events about Semantic Web technology. Please see http://wiki.aksw.org/Colloquium for further information about previous and future events. As always, Bachelor and Master students are able to get points for attendance and there is complimentary coffee and cake after the session.

AKSW Colloquium with JavaScript Tools and Libraries Workshop on Monday, February 17

- 2:51 pm by KonradHoeffner - One comment »

JavaScript Tools and Libraries Workshop

On Mon, Feb 17th, 2014, 1.30 – 4:00 p.m. in Room P702 (Paulinum)  Claus Stadler and Patrick Westphal hold a  workshop to exchange knowledge and experiences concerning the software development with JavaScript.

A major goal is to find best practices to be applied in future JavaScript projects of the AKSW group and agree on tools to utilize, leading to a better chance reuse and understanding.

Every participant is invited to present tools and libraries she/he used so far and point out major advantages and drawbacks. To set up an agenda everyone interested to contribute should add her/his topic to the suggested agenda at http://tinyurl.com/qhxsf6g together with her/his name. The final agenda will be derived from this document. Please design your presentations and prepare your material in a way so that participants can try out things immediately out on their notebooks.

Participation is free. Bringing your laptop is recommended.

Preliminary program: http://tinyurl.com/qhxsf6g

About the AKSW Colloquium

This event is part of a series of events about Semantic Web technology. Please see http://wiki.aksw.org/Colloquium for further information about previous and future events. As always, Bachelor and Master students are able to get points for attendance and there is complimentary coffee and cake after the session.