Abstract
Our very warm welcome to the 9th ACM Recommender Systems Conference (ACM RecSys 2015), held between September 16th and 20th, in Vienna, Austria. The RecSys conference series has clearly established itself as the premier international forum for research and development in the field of Recommender Systems, where leading researchers and practitioners from academia and industry meet to share their challenges, solutions, research results, and experiences in the field.
The maturity of the conference is clearly demonstrated by the high quality of the submitted research work. This year RecSys received again clearly more than 200 submissions (131 long papers and 84 short papers) and the review process was extremely selective. The Program Committee worked very hard to ensure that every paper got at least three careful and fair reviews and one metareview. All papers, particularly those at the borderline, were also reviewed and thoroughly discussed by a Senior Program Committee member and by the PC Chairs. This process finally led to the acceptance of 28 long papers for oral presentation (acceptance rate 21.4%) and 22 short papers for poster presentation (acceptance rate 26.2%). We are therefore extremely grateful to our 131 Program Committee members (34 senior and 97 regular) and to our 57 additional reviewers for producing more than 875 detailed and insightful reviews and metareviews. Furthermore, we would like to particularly thank those Senior Program Committee members, who assisted the program chairs in identifying those distinguished papers who received awards.
Besides the technical paper program consisting of oral presentations and a poster and demo session, the core conference program also includes two keynote speakers, two industry sessions and a panel discussion. In order to accommodate the program in a two and a half day format technical papers are presented in two parallel tracks for the first time in this conference series. In addition the conference includes four tutorials and a challenge as a pre-conference program and nine workshops as well as a doctoral symposium as post-conference events.