Usability Engineering kompakt

Sample

Jean-Claude Geffroy, Gilles Motet

Today computing systems are more and more complex and they assume more and more responsibilities in all sectors of human activity. Unfortunately, many faults can harm the development or the use of these products. Destructive mechanisms transform faults into errors and finally failures altering the delivered service. For critical systems, the consequences of these failures can be catastrophic, but for most non-critical systems, failures are nowadays unacceptable. Hence, it is necessary to take dependability attributes into account, along the product lifecycle. This book aims at providing a general overview of the dependability of computing systems: impairments and protective means. Issues, concepts and techniques are considered from a system point of view, and are illustrated by both hardware and software technologies. An important pedagogical effort has been made: the explanations are illustrated by 370 figures, 80 examples, and 97 exercises with complete answers. A glossary of more than 500 entries defines the important terms.

Sample

Olaf Zimmermann, Mark Tomlinson, Stefan Peuser

"The ongoing Web services trend is ubiquitously featured already - many publications on Web services exist. The first wave of enterprise-scale applications and projects exploiting the benefits of the technology is on its way. However, there is still a lack of experience in the field - technical decision makers are struggling about when to apply which elements of the technology, and how to do so. This is a variation of the well-known "chicken and egg" problem: no project without an architectural decision, no architectural decision without experience, no experience without a project. This book provides technical guidance and helps the reader to cut the Gordian knot." Key Topics - Seven - sometimes controversial - Perspectives on Web services, covering the entire project lifecycle from opportunity identification to design, development, and deployment - Introduction to Web services architectures as defined by the World Wide Web Consortium (W3C), and their Java 2 Enterprise Edition (J2EE) instantiations - Understanding the Web services building blocks SOAP, WSDL, and UDDI - Business scenarios and functional/non-functional requirements for Web services solutions - Patterns for Web services projects and related architectural decisions - Sample implementation platform: IBM WebSphere Studio integrated development environment and IBM WebSphere Application Server Version 5 - Full-scope implementation of an end-to-end case study, including hands-on instructions for development and deployment - Apache SOAP 2.3 as well as JAX-RPC programming through JSR 109 and Apache Axis - Interoperability between Microsoft .NET C# and Apache SOAP - Runtime topologies for Web services solutions, deployment to WebSphere, transport layer and Web services security - Best practices for design and management of Web services projects - Trends such as Grid computing and the semantic Web Features: - Project-centric approach including lessons learnt and pitfalls to avoid - Many sample project deliverables, including checklists to decide whether Web services are an appropriate solution to a given business problem - Guide to W3C recommendations and other Web services specifications - Full source code for a complete reference implementation - Many rich illustrations, website support, and extensive pointers to other Web resources This book will provide everything that a project team needs to know about design, development and deployment of Web services with the IBM WebSphere product family. Taking a realistic and pragmatic view on the subject, this book will be an essential part of every Java Web service developer's bookshelf. Meet fictitious members of the target audience as they find their way through a first-of-a-kind Web services project, and hear their opinions on the topic at hand. Benefit from the real-world experience the authors gained during numerous client projects and workshops.

Sample

Rainer Palm, Hans Hellendoorn, Dimiter Driankov

Model Based Fuzzy Control uses a given conventional or fuzzy open loop model of the plant under control to derive the set of fuzzy rules for the fuzzy controller. Of central interest are the stability, performance, and robustness of the resulting closed loop system. The major objective of model based fuzzy control is to use the full range of linear and nonlinear design and analysis methods to design such fuzzy controllers with better stability, performance, and robustness properties than non-fuzzy controllers designed using the same techniques. This objective has already been achieved for fuzzy sliding mode controllers and fuzzy gain schedulers - the main topics of this book. The primary aim of the book is to serve as a guide for the practitioner and to provide introductory material for courses in control theory.

Sample

Panos Antsaklis ... [et al.], eds

This book constitutes the thoroughly refereed post-conference documentation of the Fourth International Conference on Hybrid Systems held in Ithaca, NY, USA, in October 1996. The volume presents 19 carefully revised full papers selected from numerous submissions. Hybrid systems research focuses on modeling, design, and validation of interacting systems (plants) and computer programs (control automata). This volume is devoted to hybrid systems models, formal verification, computer simulation, goal reachability, algorithms for extracting hybrid control programs, and application models for avionics, highway traffic control, and air traffic control.