Bottari is a LarKC application http://www.larkc.eu/. It offers a real-time personalized recommendation service for restaurants in Insa-dong(Seoul) listening to the reputation of the restaurants on social media. Social media anlytics is powered by LarKC inductive and deductive stream reasoning solution. Learn more at http://larkc.cefriel.it/lbsma/bottari/ .

1. BOTTARI: Location based Social Media Analysis with Semantic Web Emanuele Della Valle Joint work with: CEFRIEL : Irene Celino, Daniele Dell ’ Aglio, Marco Balduini SALTLUX : Tony Lee, Seonho Kim S IEMENS : Volker Tresp, Yi Huang

2. Watch this first :-) 26.10.2011 - SW Challenge 2011, ISWC 2011, Bonn, Germany http://www.youtube.com/watch?v=c1FmZUz5BOo

5. Architecture 26.10.2011 - SW Challenge 2011, ISWC 2011, Bonn, Germany out Query Rewriter Query Evaluator RDF2Matrix Plug-in Streaming Linked Data Server SOR Invoker SOR geo-spatial KB Social Media Crawler and Sentiment Miner HTTP PULL: Query Initiated PUSH: Data Initiated SPARQL androjena

7. SOR - Geo-Spatial KB 26.10.2011 - SW Challenge 2011, ISWC 2011, Bonn, Germany

8. C-SPARQL and Streaming Linked Data Server 26.10.2011 - SW Challenge 2011, ISWC 2011, Bonn, Germany

11. LarKC At Work 26.10.2011 - SW Challenge 2011, ISWC 2011, Bonn, Germany PULL: Query Initiated PUSH: Data Initiated SPARQL androjena Probabilistic part of the query to get personalized recommendations (the “ for me ” button in BOTTARI) Geo-Spatial part of the query to get POIs closer to user location Streaming part of the query to get trends in users' sentiment (the “ emerging ” button in BOTTARI) Input user query is split Results of the different computations are joined out Query Rewriter Query Evaluator RDF2Matrix Plug-in Streaming Linked Data Server SOR Invoker SOR geo-spatial KB Social Media Crawler and Sentiment Miner HTTP

12. Evaluation - Efficacy 26.10.2011 - SW Challenge 2011, ISWC 2011, Bonn, Germany 5 10 15 20 25 30 0,7 random knnItem emerging (C-SPARQL) for me (SUNS) SUNS + C-SPARQL 0,6 0,5 0,4 0,3 0,2 0,1

13. Evaluation - Efficiency 26.10.2011 - SW Challenge 2011, ISWC 2011, Bonn, Germany Hardware: 2.66 GHz Intel Core 2 Duo with 8 GB RAM

14. Evaluation – Scalability 26.10.2011 - SW Challenge 2011, ISWC 2011, Bonn, Germany Number of concurrent users Query Latency (sec)

16. Emanuele Della Valle Joint work with: CEFRIEL : Irene Celino, Daniele Dell ’ Aglio, Marco Balduini SALTLUX : Tony Lee, Seonho Kim S IEMENS : Volker Tresp, Yi Huang Any question?