Christophe Van Gysel

Research fellow at the University of Amsterdam, member of the Information and Language Processing Systems group.

Fascinated by Large-scale Data Processing, 
Information Retrieval, Natural Language Processing, Machine Learning, Internet Security and more.


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Experience

I interned twice at Google (Mountain View) in 2013 where I worked on feature selection methods. Early 2014 I interned at Facebook in London with their Security Infrastructure team. During Summer 2014 I interned at Google again in New York with the Speech team where I worked on language modelling. Last Summer (2016), I interned at Apple in Cupertino where I worked on language modelling. Early 2017 I interned with Microsoft Bing and Research in London, working on query formulation in the email domain. During Summer 2017, I interned with Snap Inc.'s search team where I worked on semantic matching. On November 17, 2017, I successfully defended my PhD!

For a detailled overview, check out my LinkedIn profile.


Publications (Google Scholar)

2017

  • TREC 2017 Common Core Track Overview. James Allan, Donna Harman, Evangelos Kanoulas, Dan Li, Christophe Van Gysel and Ellen Vorhees. TREC 2017. To appear November 2017.

  • ILPS at TREC 2017 Common Core Track. Christophe Van Gysel, Dan Li and Evangelos Kanoulas. TREC 2017. To appear November 2017.

  • Remedies against the Vocabulary Gap in Information Retrieval. Christophe Van Gysel. PhD Thesis. To appear November 2017.

  • Neural Vector Spaces for Unsupervised Information RetrievalChristophe Van Gysel, Maarten de Rijke and Evangelos Kanoulas. 2017. [pre-print on arXiv] [code]

  • Reply With: Proactive Recommendation of Email Attachments. Christophe Van Gysel, Bhaskar Mitra, Matteo Venanzi, Roy Rosemarin, Grzegorz Kukla, Piotr Grudzien and Nicola Cancedda. CIKM 2017. November 2017. [pdf on arXiv] [slides]

  • Structural Regularities in Text-based Entity Vector Spaces. Christophe Van Gysel, Maarten de Rijke and Evangelos Kanoulas. ICTIR 2017. September 2017. [pdf on arXiv] [code]

  • Semantic Entity Retrieval Toolkit. Christophe Van Gysel, Maarten de Rijke and Evangelos Kanoulas. Neu-IR 2017. August 2017. [pdf on arXiv] [code] [slides]

  • Neural Networks for Information Retrieval (NN4IR). Tom Kenter, Alexey Borisov, Christophe Van Gysel, Mostafa Dehghani, Maarten de Rijke and Bhaskar Mitra. Tutorial at SIGIR 2017. August 2017. [overview pdf on arXiv] [website]

  • Pyndri: a Python Interface to the Indri Search Engine. Christophe Van Gysel, Evangelos Kanoulas and Maarten de Rijke. ECIR 2017. April 2017. [pdf on arxiv] [code]

2016

  • Learning Latent Vector Spaces for Product Search. Christophe Van Gysel, Maarten de Rijke and Evangelos Kanoulas. CIKM 2016. October 2016. [pdf on arxiv] [code] [slides]

  • Lexical Query Modeling in Session Search. Christophe Van Gysel, Evangelos Kanoulas and Maarten de Rijke. ICTIR 2016. September 2016. [pdf on arxiv] [code]

  • Unsupervised, Efficient and Semantic Expertise RetrievalChristophe Van Gysel, Maarten de Rijke and Marcel Worring. WWW 2016, April 2016. [pdf] [code] [slides]

2015

  • Semantic Entities. Christophe Van Gysel, Maarten de Rijke and Marcel Worring. Keynote at ESAIR 2015 (CIKM workshop), October 2015. [pdf on ACM]

  • Garbage Modeling for On-device Speech Recognition. Christophe Van GyselLeonid Velikovich, Ian McGraw and Françoise Beaufays. Interspeech 2015, September 2015. [pdf]

  • Determining the Presence of Political Parties in Social Circles. Christophe Van Gysel, Bart Goethals and Maarten de Rijke. ICWSM 2015, May 2015. [pdf] [code]


Security research

In the past I was active as a web security enthousiast. I actively searched for and reported security vulnerabilities in web services. Most notably, I discovered security holes in services hosted by Facebook, Google, PayPal and Dropbox.


Press



Education

Since November 2014 I have been pursuing a PhD in Computer Science at the University of Amsterdam (The Netherlands). I obtained my MSc in Computer Science from the University of Antwerp (Belgium) in July 2014 with greatest distinction. In July 2012 I was awarded a BSc in Computer Science (great distinction) from the University of Antwerp (Belgium).


Contact: cvangysel [at] uva [.] nl