Includes bibliographical references and index.

Learning-Based Pseudo-Relevance Feedback for Patent Retrieval / Parvaz Mahdabi and Fabio Crestani -- Analyzing Parallelism and Domain Similarities in the MAREC Patent Corpus / Katharina Waschle and Stefan Riezler -- Query Enhancement for Patent Prior-Art-Search Based on Keyterm Dependency Relations and Semantic Tags / Khanh-Ly Nguyen and Sung-Hyon Myaeng -- Analysis and Detection of Web Spam by Means of Web Content / Victor M. Prieto, Manuel Alvarez, Rafael Lopez-Garcia and Fidel Cacheda -- Discovery of Environmental Nodes in the Web / Anastasia Moumtzidou, Stefanos Vrochidis, Sara Tonelli, Ioannis Kompatsiaris and Emanuele Pianta -- Web Searching with Entity Mining at Query Time / Pavlos Fafalios, Ioannis Kitsos, Yannis Marketakis, Claudio Baldassarre and Michail Salampasis, et al. -- Patent and Norm Exploration with the m2n Knowledge Discovery Suite / Tobias Schleser, Doris Ipsmiller and Roland Morzinger -- Hierarchical Classification of Web Documents by Stratified Discriminant Analysis / Juan Carlos Gomez and Marie-Francine Moens -- PatMedia: Augmenting Patent Search with Content-Based Image Retrieval / Stefanos Vrochidis, Anastasia Moumtzidou, Gerard Ypma and Ioannis Kompatsiaris -- Generating Variant Keyword Forms for a Morphologically Complex Language Leads to Successful Information Retrieval with Finnish / Kimmo Kettunen and Paavo Arvola -- Analyzing Query Logs of USPTO Examiners to Identify Useful Query Terms in Patent Documents for Query Expansion in Patent Searching: A Preliminary Study / Wolfgang Tannebaum and Andreas Rauber -- Discovering Relevant Features for Effective Query Formulation / Luepol Pipanmaekaporn and Yuefeng Li.