News and Updates on the KRR Group
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Source: Data2Semantics

Our website with additional material for our paper: “A Fast Approximation of the Weisfeiler-Lehman Graph Kernel for RDF Data” has won the Open Science Award at ECML/PKDD 2013. The jury praised the submission as “a perfect example of open science”.

A goal of the Data2Semantics project is to provide resuable software to support semantic enrichment of data. Therefore, the software used for the paper uses existing well-known libraries (SESAME, LibSVM) and was set up into three distinct projects from the start. The heart of software is the proppred library, which contains all the code for doing property prediction using graph kernels on RDF data. Some additional support code for handling RDF is in the d2s-tools project. All the code to run the experiments from the paper(s) is in a separate project called kernelexperiments. This setup allows for easy replication of the (and doing new) experiments and easier integration of the property prediction on RDF library into other projects.

For the future, we aim to provide even more scientific openess via the experimental machine learning platform that we are developing. One of the aims of the platform is to make experimentation easier, without introducing too much overhead. Furthermore, we wil export provenance of the experiments in the Prov-O format. This provenance is visualized using Prov-O-Viz (also developed in Data2Semantics), allowing researchers to gain better insight into the experiments without having to study the code.

protege logo +Apache Jena + YASGUI

 

This year we again have a nice group of students (almost 70) following the 3rd year bachelor Semantic Web course. Until this year it was quite a hassle to combine the bits and pieces to create a complete workflow starting from ontology creation (in Protégé) to having a nice SPARQL endpoint that reasons in OWL over the ontology+instances.

Like the previous years, the instructors (Stefan Schlobach and Ronald Siebes) updated the assignment by the latest developments regarding available toolkits and software.  We were surprised that it was very easy to integrate these latest tools and are now able to do the following within 30 minutes on any machine:

– create a simple ontology in Protégé

– install a sparql endpoint with OWL reasoning (Jena-Fuseki)

– import the ontology

– connect this local endpoint with Yasgui (http://yasgui.laurensrietveld.nl)

– do via Yasgui a federated query combining results from our local endpoint together with results from other endpoints (e.g. DBPedia)

Conclusion: it is now in reach of many people to get, without a lot of suffering, a nice Semantic Web infrastructure up-and-running, and connect it with the vast amount of external Linked-data from various endpoints.

The Semantic Web works!

Here you can find a manual to do this yourself and hopefully share the conclusion.

 

Source: Semantic Web world for you
Yesterday I was sitting in a very interesting meeting with some experts in data visualisation. There was a lot of impressive things presented and the name of Wii remote and Kinect were mentioned a couple of time. As I observed so far, these devices are used as cheap way to get sensors. And they certainly […]

Source: Semantic Web world for you
Yesterday I was sitting in a very interesting meeting with some experts in data visualisation. There was a lot of impressive things presented and the name of Wii remote and Kinect were mentioned a couple of time. As I observed so far, these devices are used as cheap way to get sensors. And they certainly […]

Helping scholars tell their stories using altmetrics

Posted by data2semantics in collaboration | computer science | large scale | semantic web | vu university amsterdam - (Comments Off on Helping scholars tell their stories using altmetrics)

Source: Data2Semantics

Paul Groth co-authored an article about altmetrics in the Elsevier Library Connect newsletter for librarians. The newsletter reaches 18,000 librarians in 138 countries around the world.

Academic research and publishing have transitioned from paper to online platforms, and that migration has continued to evolve from closed platforms to connected networks. With this evolution, there is growing interest in the academic community in how we might measure scholarly activity online beyond formal citation.

See more at: http://bit.ly/19bEVpD

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