” Therefore, the focus of the conference was to cover aspects related to the theoretical foundation of EC, business processes as well as new - proaches exploiting recently emerged technologies and scenarios such as the Semantic Web, Web services, SOA architectures, mobile and ubiquitous computing, just to cite a few.

Invited Talk.- Voting: A View through the Algorithmic Lens.- Infomobility and Negotiation.- Personalized Popular Blog Recommender Service for Mobile Applications.- Bargaining Agents in Wireless Contexts: An Alternating-Offers Protocol for Multi-issue Bilateral Negotiation in Mobile Marketplaces.- A Group Recommender System for Tourist Activities.- Personalized Location-Based Recommendation Services for Tour Planning in Mobile Tourism Applications.- E-payments and Trust.- Do You Trust Your Phone?.- A Multi-scheme and Multi-channel Framework for Micropayment Systems.- Secure Transaction Protocol for CEPS Compliant EPS in Limited Connectivity Environment.- Trust Enhanced Authorization for Mobile Agents.- Domain Knowledge and Metadata Exploitation.- Towards Semantic Modelling of Business Processes for Networked Enterprises.- Metadata-Driven SOA-Based Application for Facilitation of Real-Time Data Warehousing.- Exploiting Domain Knowledge by Automated Taxonomy Generation in Recommender Systems.- Automatic Generation of Mashups for Personalized Commerce in Digital TV by Semantic Reasoning.- Invited Talk.- Product Variety, Consumer Preferences, and Web Technology: Can the Web of Data Reduce Price Competition and Increase Customer Satisfaction?.- Design and Modelling of Enterprise and Distributed Systems.- Perspectives for Web Service Intermediaries: How Influence on Quality Makes the Difference.- Aligning Risk Management and Compliance Considerations with Business Process Development.- Electronic Commerce and Web 3.0.- Using Knowledge Base for Event-Driven Scheduling of Web Monitoring Systems.- RCQ-GA: RDF Chain Query Optimization Using Genetic Algorithms.- Integrating Markets to Bridge Supply and Demand for Knowledge Intensive Tasks.- Real-Time Robust Adaptive Modeling and Scheduling for an Electronic Commerce Server.- Collaboration-Based Approaches.- Content-Based Personalization Services Integrating Folksonomies.- Computational Complexity Reduction for Factorization-Based Collaborative Filtering Algorithms.- Sequence-Based Trust for Document Recommendation.- Recommender Systems Modelling.- Recommender Systems on the Web: A Model-Driven Approach.- Designing a Metamodel-Based Recommender System.- Towards Privacy Compliant and Anytime Recommender Systems.- Reputation and Fraud Detection.- Assessing Robustness of Reputation Systems Regarding Interdependent Manipulations.- Fraud Detection by Human Agents: A Pilot Study.- Recommender Systems and the Social Web.- Finding My Needle in the Haystack: Effective Personalized Re-ranking of Search Results in Prospector.- RATC: A Robust Automated Tag Clustering Technique.- Recommender Systems in Action.- ISeller: A Flexible Personalization Infrastructure for e-Commerce Applications.- Comparing Pre-filtering and Post-filtering Approach in a Collaborative Contextual Recommender System: An Application to E-Commerce.- Providing Relevant Background Information in Smart Environments.

This book constitutes the refereed proceedings of the 10th International Conference on Electronic Commerce and Web Technologies, EC-Web 2009, held in Linz, Austria, in September, 2009 in conjunction with Dexa 2009. The 31 revised full papers presented together with 2 invited papers were carefully reviewed and selected from 61submissions. The papers are organized in nine topical sessions on e-payments and trust, domain knowledge and metadata exploitation, design and modelling of enterprise and distributed systems, electronic commerce and web 3.0, collaboration-based approaches, recommender systems modelling, reputation and fraud detection, recommender systems and the social web, and recommender systems in action.