Databases and Information Systems
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Victor Anthony Arrascue Ayala

Institut für Informatik
Albert-Ludwigs-Universität Freiburg
Georges-Köhler-Allee 51
79110 Freiburg i. Br., Germany
Office:   051-01-027

phone:   +49 (761) 203-8133
fax:        +49 (761) 203-8122

About me

Research Interests

  • Cross-domain Recommender Systems
  • Semantic Web (RDF storage, SPARQL evaluation, Linked Data)
  • Distributed Computing (Spark)
  • Route planning

Master Thesis

  • ReSPARQL: a SPARQL Extension for Generic Recommendations on RDF-graphs.pdf ]
    February 2014. University of Freiburg (Germany)

Current Research Projects


  • Victor Anthony Arrascue Ayala, Polina Koleva, Anas Alzogbi, Matteo Cossu, Michael Färber, Patrick Philipp, Guilherme Schievelbein, Io Taxidou, Georg Lausen:
    Relational Schemata for Distributed SPARQL Query Processing.
    In Proc. of the International Workshop on Semantic Big Data (SBD 2019) in conjunction with the 2019 ACM SIGMOD Conference (Sigmod 2019). Amsterdam, Netherlands, June 30-July 5, 2019
  • Victor Anthony Arrascue Ayala, Georg Lausen:
    A Flexible N-Triples Loader for Hadoop. [.pdf]
    International Semantic Web Conference (P&D) (ISWC 2018)
  • Victor Anthony Arrascue Ayala, Kemal Cagin Gülsen, Marco Muñiz, Anas Alzogbi, Michael Färber, Georg Lausen:
    A Delay-Robust Touristic Plan Recommendation Using Real-World Public Transportation Information..pdf ]
    In Proc. of the Workshop on Recommenders in Tourism (RecTour 2017) at the 11th ACM Conference on Recommender Systems (RecSys 2017). Como, Italy, August 27th, 2017
  • Victor Anthony Arrascue Ayala, Trong-Nghia Cheng, Anas Alzoghbi, Georg Lausen:
    Learning to Identify Complementary Products from DBpedia..pdf ]
    In Proc. of the Workshop on Linked Data on the Web (LDOW 2017) at the 26th International World Wide Web Conference (WWW 2017). Perth, WA, Australia, April 3rd, 2017
  • Anas Alzoghbi, Victor Anthony Arrascue Ayala, Peter M Fischer, Georg Lausen:
    Learning-toRank in research paper CBF recommendation: Leveraging irrelevant papers.pdf ]
    In Proc. of the 3rd Workshop on New Trends in Content-Based Recommender Systems (CBRecSys 2016) co-located with ACM Conference on Recommender Systems (RecSys 2016). Boston, MA, USA, September 16, 2016
  • Anas Alzoghbi, Victor Anthony Arrascue Ayala, Peter M Fischer, Georg Lausen:
    PubRec: Recommending Publications Based On Publicly Available Meta-Data.pdf ]
    In Proc. of the LWA 2015 Workshops: KDML, FGWM, IR, and FGDB. Trier, Germany, October 7-9, 2015
  • Victor Anthony Arrascue Ayala, Anas Alzoghbi, Martin Przyjaciel-Zablocki, Alexander Schätzle, Georg Lausen:
    Speeding up Collaborative Filtering with Parametrized Preprocessing.pdf ]
    In Proc. of the 6th International Workshop on Social Recommender Systems (SRS 2015),
    in conjunction with the 2015 ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD 2015). Sydney, Australia, August 2015.
  • Victor Anthony Arrascue Ayala, Martin Przyjaciel-Zablocki, Thomas Hornung, Alexander Schätzle, Georg Lausen:
    Extending SPARQL for Recommendations.pdf ]
    In Proc. of the 6th International Workshop on Semantic Web Information Management (SWIM 2014),
    in conjunction with the 2014 ACM International Conference on Management of Data (SIGMOD 2014). Snowbird, Utah (USA), June 2014.


  • Recommender Systems and SPARQL: More than a Shotgun Wedding?
    8th Alberto Mendelzon International Workshop (AMW 2014). Cartagena (CO), June 2014.