This book constitutes the refereed proceedings of the 13th International Conference on Electronic Commerce and Web Technologies (EC-Web) held in Vienna, Austria, in September 2012. The 15 full and four short papers accepted for EC-Web, selected from 45 submissions, were carefully reviewed based on their originality, quality, relevance, and presentation. They are organized into topical sections on recommender systems, security and trust, mining and semantic services, negotiation, and agents and business services.

This textbook mainly addresses beginners and readers with a basic knowledge of object-oriented programming languages like Java or C#, but with little or no modeling or software engineering experience - thus reflecting the majority of students in introductory courses at universities. Using UML, it introduces basic modeling concepts in a highly precise manner, while refraining from the interpretation of rare special cases. After a brief explanation of why modeling is an indispensable part of software development, the authors introduce the individual diagram types of UML (the class and object diagram, the sequence diagram, the state machine diagram, the activity diagram, and the use case diagram), as well as their interrelationships, in a step-by-step manner. The topics covered include not only the syntax and the semantics of the individual language elements, but also pragmatic aspects, i.e., how to use them wisely at various stages in the software development process. To this end, the work is complemented with examples that were carefully selected for their educational and illustrative value. Overall, the book provides a solid foundation and deeper understanding of the most important object-oriented modeling concepts and their application in software development. An additional website offers a complete set of slides to aid in teaching the contents of the book, exercises and further e-learning material.

This book constitutes the refereed proceedings of the 14th International Conference on Electronic Commerce and Web Technologies (EC-Web) held in Prague, Czech Republic, in August 2013. In 2013, EC-Web focused on recommender systems, semantic e-business, business services and process management, and agent-based e-commerce. The 13 full and 6 short papers accepted for EC-Web, selected from 43 submissions, were carefully reviewed based on their originality, quality, relevance, and presentation.

Kindliches Rheuma ist eine haufige Erkrankung, die von vielen Arzten und Patienten bis dato zu wenig beachtet wurde. Dieses Buch bietet erstmalig betroffenen Familien einen umfassenden Uberblick zu dem Formenkreis der rheumatischen Erkrankungen im Kindes- und Jugendalter. Die unterschiedliche Symptomatik, der Weg zur Diagnose und verschiedene Therapieansatze werden ausfuhrlich behandelt. Ebenso werden wichtige Begriffe, wie etwa chronische Entzundung, Arthritis, Autoimmunsystem fachmannisch und verstandlich erklart. Ein Hauptaugenmerk liegt auf den verschiedenen Therapiemoglichkeiten, deren Anwendbarkeit und Erfolgsaussichten. Neben der medikamentosen Therapie werden physio- und ergotherapeutische Methoden prasentiert. Anleitungen zur Selbsthilfe sowie ein Serviceteil mit nutzlichen Adressen komplettieren diesen Ratgeber. Auch behandelnde Arzte erfahren Wissenswertes uber dieses Krankheitsbild um ihre jungen Patienten optimal zu betreuen und behandeln."