The iZi Project: Easy Prototyping of Interesting Pattern Mining Algorithms -- CODE: A Data Complexity Framework for Imbalanced Datasets -- An Empirical Study of Applying Ensembles of Heterogeneous Classifiers on Imperfect Data -- Undersampling Approach for Imbalanced Training Sets and Induction from Multi-label Text-Categorization Domains -- Adaptive Methods for Classification in Arbitrarily Imbalanced and Drifting Data Streams -- Two Measures of Objective Novelty in Association Rule Mining -- PAKDD Data Mining Competition 2009: New Ways of Using Known Methods -- Feature Selection for Brain-Computer Interfaces -- Mining Protein Interactions from Text Using Convolution Kernels -- Missing Phrase Recovering by Combining Forward and Backward Phrase Translation Tables -- Automatic Extraction of Thai-English Term Translations and Synonyms from Medical Web using Iterative Candidate Generation with Association Measures -- Accurate Subsequence Matching on Data Stream under Time Warping Distance.