Learning Probabilistic Semantic Network of Object-oriented Action and Activity -- Semantic-aware Expert Partitioning -- User-Level Opinion Propagation Analysis in Discussion Forum Threads -- Social News Feed Recommender -- Boolean Matrix Factorisation for Collaborative Filtering: An FCA-Based Approach -- Semi-Supervised Image Segmentation -- Analysis of Rumor Spreading in Communities Based on Modified SIR Model in Microblog -- Modeling a System for Decision Support in Snow Avalanche Warning -- Using Balanced Random Forest and Weighted Random Forest -- Applying Language Technologies on Healthcare Patient Records for Better Treatment of Bulgarian Diabetic Patients -- Incrementally Building Partially Path Consistent Qualitative Constraint Networks -- A Qualitative Spatio-Temporal Framework Based on Point Algebra -- Training Datasets Collection and Evaluation of Feature Selection Methods for Web Content Filtering -- Feature Selection by Distributions Contrasting -- Educational Data Mining for Analysis of Students' Solutions.