9th Russian Summer School in Information Retrieval (RuSSIR 2015)

The 9 Russian Summer School in Information Retrieval (RuSSIR 2015) was held on August 24-28, 2015 in St. Petersburg, Russia. The school was co-organized by the National Research University Higher School of Economics and the Russian Information Retrieval Evaluation Seminar (ROMIP). The RuSSIR school series started in 2007 and has developed into a renowned academic event with extensive international participation [1, 2]. Previously, RuSSIR took place in Yekaterinburg, Taganrog, Petrozavodsk, Voronezh, St. Petersburg, Yaroslavl, Kazan, and Nizhny Novgorod. RuS-