Recommender System 1 -- Map-Based Recommendation of Hyperlinked Document Collections -- Web User Segmentation Based on a Mixture of Factor Analyzers -- A Hybrid Similarity Concept for Browsing Semi-structured Product Items -- Recommender Systems 2 -- A Preference-Based Recommender System -- Enhanced Prediction Algorithm for Item-Based Collaborative Filtering Recommendation -- Persuasive Online-Selling in Quality and Taste Domains -- Business Process / Design Aspects -- Proviado – Personalized and Configurable Visualizations of Business Processes -- Service-Oriented Data and Process Models for Personalization and Collaboration in e-Business -- A Framework for Raising Collaboration Levels on the Internet -- Designing Volatile Functionality in E-Commerce Web Applications -- Mobile Commerce -- Design of Ubiquitous Referral Marketing: A Business Model and Method -- Pre-service and Post-transcoding Schema for an Adaptive PC to Mobile Web Contents Transcoding System -- Context-Aware Recommendation Service Using Multi-leveled Information in Mobile Commerce -- Security and E-Payment -- Attribute-Based Authentication and Authorisation Infrastructures for E-Commerce Providers -- Seamlessness and Privacy Enhanced Ubiquitous Payment -- CerTicket Solution: Safe Home-Ticketing Through Internet -- Web Services Computing / Semantic Web -- Efficient Invocation of Web Services Using Intensional Results -- On Distributed Service Selection for QoS Driven Service Composition -- RLinda: A Petri Net Based Implementation of the Linda Coordination Paradigm for Web Services Interactions -- E-Negotiation and Agent Mediated Systems -- Making Informed Automated Trading a Reality -- An Analysis of Service Trading Architectures -- An Ontological Approach for Translating Messages in E-Negotiation Systems -- Issues in Web Advertising -- Detecting Frauds in Online Advertising Systems -- An Improved Web System for Pixel Advertising.