Internet-Based Collaborative Work/E-Education.- Helping E-Commerce Consumers Make Good Purchase Decisions: A User Reviews-Based Approach.- Using Instant Messaging Systems as a Platform for Electronic Voting.- A Multi-criteria Collaborative Filtering Approach for Research Paper Recommendation in Papyres.- Industrial Experience.- An Ontological Approach to Connecting SOA Implementations.- A Non-technical User-Oriented Display Notation for XACML Conditions.- Goal-Driven Development of a Patient Surveillance Application for Improving Patient Safety.- Global Location-Based Access to Web Applications Using Atom-Based Automatic Update.- Inter-Organizational Processes I.- Toward a Framework for Dynamic Service Binding in E-Procurement.- Integrating Identity Management With Federated Healthcare Data Models.- Wrestling With a Paradox: Complexity in Interoperability Standards Making for Healthcare Information Systems.- Open Source and Open Environments.- Aligning Goal and Value Models for Information System Design.- Model-Based Penetration Test Framework for Web Applications Using TTCN-3.- Impact of Diversity on Open Source Software.- Web Search Based on Web Communities Feedback Data.- Inter-Organizational Processes II.- Improving Trust and Reputation Modeling in E-Commerce Using Agent Lifetime and Transaction Count.- Towards a Methodology for Representing and Classifying Business Processes.- Typing for Conflict Detection in Access Control Policies.- Short Research Contributions.- Dynamic Pricing in Electronic Commerce Using Neural Network.- TwoStep: An Authentication Method Combining Text and Graphical Passwords.- Design Principles for E-Government Architectures.- A Proposed Intelligent Policy-Based Interface for a Mobile eHealth Environment.- Security and Trust.- Verification ofInformation Flow in Agent-Based Systems.- A Legal Perspective on Business: Modeling the Impact of Law.- A Requirement Engineering Framework for Electronic Data Sharing of Health Care Data Between Organizations.- Service-Oriented Architecture.- An Aspect-Oriented Framework for Business Process Improvement.- Integration Testing of Web Applications and Databases Using TTCN-3.- A Reference Model for Semantic Peer-to-Peer Networks.

This volume constitutes the proceedings of the 4th International Conference on E-Technologies, MCETECH 2009, held in Ottawa, Canada, during May 4-6, 2009. The 23 full and 4 short papers included in this volume were carefully reviewed and selected from a total of 42 submissions. They cover topics such as inter-organzational processes, service-oriented architectures, security and trust, middleware infrastructures, open source and open environments, and applications including eGovernment, eEducation, and eHealth.