ECML-PKDD 2011 Discovery Challenge Overview
Nino Antulov-Fantulin, Matko Bošnjak, Martin Žnidaršič, Miha Grćar, Mikołaj Morzy, Tomislav Šmuc · 2011
Abstract. This year’s Discovery Challenge was dedicated to solving of the video lecture recommendation problems, based on the data collected at VideoLectures.Net site. Challenge had two tasks: task 1 in which new-user/newitem recommendation problem was simulated, and the task 2 which was a simulation of the clickstream-based recommendation. In this overview we present challenge datasets, tasks, evaluation measure and we analyze solutions and results. 1 General description of the challenge VideoLectures.Net (VL.Net) 4 is a free and open access multimedia repositoryof video lectures, mainly of research and educational character. The lectures are given by distinguished scholars and scientists at the most important and prominent events like conferences, summer schools, workshops and science promotional events from many fields of science. The website is aimed at promoting science, exchanging ideas and fostering knowledge sharing by providing high quality didactic contents not only to the scientific community but also to the general public. All lectures, accompanying