I was born and raised in Southern Chile, at a beatiful city called Valdivia. This picture was shot at the Botanic garden in the Southern University of Chile.

Denis Parra

Assistant Professor at PUC Chile
dparra[at]ing[dot]puc[dot]cl

Address
Departamento Ciencia de la Computación
Vicuña Mackenna 4860, Macul
Santiago, Chile
zip code 7820436

Publications (via )
Google Scholar Page
Blog on Data Analysis
Twitter Page
Old Web Site

News

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September 2016 I attended the ACM RecSys 2016 conference in Boston, USA. In collaboration with Dr. Chris Trattner, we presented "Understanding the Impact of Weather for POI Recommendations." In another collaboration, led by Prof. Katrien Verbert, we presented "Scalable Exploration of Relevance Prospects to Support Decision Making." I also co-organized the Large-Scale Recsys Workshop with Tao Ye (Pandora) and Danny Bickson (Dato) Slides here.

August 2016 Second term starting at PUC Chile! Don't miss the Data Science Day 1, tools for information visualization.

July 2016 I attended the UMAP 2016 conference in Halifax, Canada. In addition to presenting our paper "Moodplay: Interactive Mood-based Music Discovery and Recommendation", I gave an invited talk at the IFUP Workshop, titled "Data Fusion for Dealing with the Recommendation Problem", slides here. I also gave another invited talk at the FuturePD workshop about ways to expand our Moodplay system with respect to the emotional context.

May 2016 Our first article on the Moodplay system (link to demo video), a music artists' recommender system based on emotions, was accepted at the UMAP 2016 conference. This is a collaboration with Ivana Andjelkovic and John O'Donovan from University of California, Santa Barbara. In addition, online media in Chile has covered our work such as EMOL, La Tercera, Diario Financiero, and I have also given some interviews to radio stations such as BioBio, Tele13 and Rock & Pop. Read the official news released by the School of Engineering at PUC about this project.

January 2016 From January 9th to February 6th I'll be visiting the University of Notre Dame (IN) as guest assistant professor to work on topics of Information Visualization and Recommender Systems with Professor Chaoli Wang. I am really excited about this collaboration and for visiting the US again after finishing my PhD in 2013 in Pittsburgh.

November 2015 I gave a talk on Recommender Systems in the StarTechConf, very interesting since the public is made mostly of software developers so the typical academic talk won't fit in. I also gave a talk at the research seminar of the Institute for Complex Systems in Engineering at University of Chile, thanks to Richard Weber for the invitation.

September 2015 Attended the ACM RecSys 2015 Conference. We presented 2 short papers and one poster. The papers were about Time-aware collaborative filtering [pre-print pdf], and a study of whether data from virtual worlds can help us make recommendations on the real world for LBSN [pre-print pdf]. The poster was in different area, we studied a way of generalizing the SLIM recommendation model, a state-of-the-art sparse model for matrix factorization [pre-print pdf]. The best news was that our collaborator Leandro Balby-Marinho won the best paper award for the article [Context-Aware Event Recommendation in Event-based Social Networks ]

August 2015 In addition to the 2 short papers accepted at ACM RecSys, we have a poster in collaboration with the PUC GRIMA group: "Towards Improving Top-N Recommendation by Generalization of SLIM" [pre-print pdf]. I am also co-organizing the Workshop on Social Computing and Personalization, co-located at ACM SIGIR 2015, which will be held in August 13th in Centro de Extensión at PUC Chile. This month is also starting the Spring term in PUC Chile (Aug-Dec), where I am teaching the Exploratory Course of the Major in Computer Science and the graduate course in Recommender Systems, IIC 3633, 2015.

July 2015 The hard work of the last year paid off and we have two papers accepted at the ACM RecSys 2015 conference. "Good Times Bad Times: A Study on Recency Effects in Collaborative Filtering for Social Tagging"[pre-print pdf] and "Are Real-World Place Recommender Algorithms Useful in Virtual World Environments?" [pre-print pdf]. See more details in our SocVis research group web site.

June 2015 - A month of talks! I have been invited to talk about Visual Approaches for Recommender Systems at Universidad de los Andes by Profesor Claudio Alvarez. I have also been invited to talk about User-centric Recommender Systems at the 1st Workshop on User Centered Research organized by Telefonica I+D, Santiago, Chile. I'll also give a talk at University of Chile, but in November of 2015.

February of 2015 - A journal article I co-wrote with Prof. Peter Brusilovsky about the visual recommender interface I developed called SetFusion [link to ppt and video] with a very complete user study and evaluation has been accepted at IJHCS. Find it (and cite it) as Denis Parra, Peter Brusilovsky, User-controllable personalization: A case study with SetFusion, Int. J. Human-Computer Studies [http://dx.doi.org/10.1016/j.ijhcs.2015.01.007]. If you want a pre-print manuscript just drop me an e-mail.

June 2015 - A month of talks! I have been invited to talk about Visual Approaches for Recommender Systems at Universidad de los Andes by Profesor Claudio Alvarez. I have also been invited to talk about User-centric Recommender Systems at the 1st Workshop on User Centered Research organized by Telefonica I+D, Santiago, Chile. I'll also give a talk at University of Chile, but in November of 2015.

February of 2015 - A journal article I co-wrote with Prof. Peter Brusilovsky about the visual recommender interface I developed called SetFusion [link to ppt and video] with a very complete user study and evaluation has been accepted at IJHCS. Find it (and cite it) as Denis Parra, Peter Brusilovsky, User-controllable personalization: A case study with SetFusion, Int. J. Human-Computer Studies [http://dx.doi.org/10.1016/j.ijhcs.2015.01.007]. If you want a pre-print manuscript just drop me an e-mail.

November 11th of 2014 - I won the contest for an invited talk at the "Chilean Computing Conference 2014", and presented my research on Recommender Systems. Find the slides here. The abstract of my talk is at the home page of the event, JCC 2014.

August 2014 - I am teaching Recommender Systems (IIC 3633) this second term of 2014 (From August 4th to Nov 30th) in PUC CHile. Course is taught in Spanish.

March 2014 - I am local and publicity chair at the ACM Hypertext Conference 2014, which will be held at PUC Chile in September 1-4 of 2014. See more information at ht.acm.org/ht2014