Month: October 2016

  • Semantic Web Technologies – OWL, Rules and Reasoning

    Summary of week four for the course Knowledge Engineering with Semantic Web Technologies 2015 by Harald Sack at OpenHPI. RDFS Semantics: we need this because there was no formal description of the semantics and then the same querys gave back different results. So you add semantics. Every triple encoded in RDF is a statement and…

  • Semantic Web Technologies – Ontology and logic

    Summary of week three for the course Knowledge Engineering with Semantic Web Technologies 2015 by Harald Sack at OpenHPI. This lecture deals with ontologies. If you want to speak a common language, you need: common symbols and concepts (Syntax) agreement about their meaning (Semantics) classification of concepts (Taxonomy) associations and relations of concepts (Thesauri) rules…

  • Semantic Web Technologies – RDFS and SPARQL

    Summary of week two for the course Knowledge Engineering with Semantic Web Technologies 2015 by Harald Sack at OpenHPI. Reification allows you to make reference statements. Therefore a statement also gets an URL. It also allows you to make statements about statements and assumptions about assumptions (e.g. Sherlock Holmes thinks that the gardener murdered the…

  • How to make your own Raspberry Pi Musicbox

    This is not about NLP, but I think it is worth sharing, so here we go 😉 I really like the project PiMusicbox, the raspberry pi is just the perfect device to host a music server, especially the model B1, which is also a little bit slow when it comes to video playback. But there…