Inhalt

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   Introduction
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   Moving from Text to the Web
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   Classification, Categorization and Clustering
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   About the Bag-of-Words
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   Ontology vs. Knowledge Base
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   Words, Concepts And Topics
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   Open And Closed Content Models
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   Thesis Contributions
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   Thesis Outline
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  Document Representation and Text Classification
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  Text Preprocessing
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   Token vs. Words
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   Sentence Segmentation
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   PoS Tagging
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   Lemmatization and Stemming
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   Named Entity Recognition
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   Document Structure Processing
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  Text Representation
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   Vector Space Models
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   Feature Weighting
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   Similarity Coefficients
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   Index Term Selection
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  Text Classification
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   Naive Bayes Classifier
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   K-Nearest Neighbor Classifier
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   Support Vector Machine Classification
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   Evaluation Metrics
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   Summary
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  Social Semantics in Information Retrieval
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  Overview
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   Information Retrieval
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   Semantics
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   Social Semantics
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   The Knowledge Acquisition Bottleneck
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   Utilizing Feature Construction
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   Towards the BOW by Topic Concepts
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   Social Semantic Concept Clouds
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   Constructing Concept Knowledge
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   Inducing the Concept Space
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   From Social Networks To Social Semantic Vectors
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   Graph Structure of Social Networks
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   Constructing Social Semantic Vectors
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   Concluding Remarks
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   Evaluation of Social Network-induced Content Models
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   Social Semantic Relatedness
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   Related Work
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   The Measure of Wiki Semantic Relatedness
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   Experimental Evaluation
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   Concluding Remarks
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  Social Network-induced Topic Identification
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   Related Work
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   A Method for Open Topic Identification
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   Experimental Evaluation
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   Concluding Remarks
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  On Social Semantics-induced Closed Topic Categorization
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   Related Work
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   Generalized Topic Concepts for Text Categorization
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   Document-based Experimental Evaluation
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   OAI-based Experimental Evaluation
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   Concluding Remarks
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   Application Scenarios of Social Semantics
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   Named Entity Instance Recognition
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   The Algorithm to Named Entity Instance Recognition
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   Experimental Evaluation
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   Concluding Remarks
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   Social Semantics-induced Sentiment Analysis
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   Related Work
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   The Social Network-induced Polarity Enhancement
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   The German Polarities Clues
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   Experimental Evaluation
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   Concluding Remarks
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   Web Genre Classification
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   Related Work
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   Hypertext Type Classification Algorithm
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   Experimental Evaluation
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   Remarks
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   Conclusion
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   Outlook