Abstract:

1：To achieve the goal of ubiquitous computing (ubicomp) – “computing anytime, anywhere”, it is essential that ubicomp software systems have the capability of adapting to dynamically changing environments. Such adaptations change the configuration and behavior of ubicomp software systems to provide not only the required functionality, but also satisfactory QoS, such as timeliness and security. Recent development of service-oriented architecture (SOA) has shown the great potential of developing adaptive software systems based on SOA. Software systems based on SOA, called service-based systems, can be rapidly composed of services provided by various organizations, regardless of the differences in the languages and/or platforms used to implement the services, and can be easily reconfigured at runtime to accommodate new requirements. However, how to develop adaptive service-based systems with satisfactory QoS in dynamic environments like ubicomp environments remains largely unknown.

In this talk, the challenges for the rapid development, deployment and operation of adaptive service-based systems to provide satisfactory QoS in ubicomp environments will be presented. Related research effort, such as autonomic computing and situation awareness, will be discussed. In particular, our research on Adaptable Situation-aware Secure Service-based (AS3) systems and Design of Service-based Software Systems with QoS Monitoring and Adaptation will be presented. Some important related research issues, such as security and privacy, arisen in the usage of contextual and situation information, and distributed trust management in service-based systems in ubicomp environments will also be discussed.

2：Service-oriented computing is often used for business applications such as e-business. However, recently service-oriented computing is also being used for real-time mission-critical applications such as telecommunication, space applications, and control systems. These systems often require real-time and deterministic behavior. To do this, it is necessary to change the traditional service-oriented computing infrastructure and protocols such as soap messaging, publishing, discovery, composition, verification, validation, simulation, monitoring, and policy management. All of these require significant changes. This talk will highlight some potential approaches to real-time service-oriented applications.

Biography：

Stephen S. Yau：

Stephen S. Yau is currently Director of Information Assurance Center and Professor of Computer Science and Engineering at Arizona State University (ASU), Tempe. He served as the Chair of Computer Science and Engineering Department at ASU, and was previously with the University of Florida, Gainesville and Northwestern University, Evanston, Illinois.  He served as the President of the Computer Society of the Institute of Electrical and Electronics Engineers (IEEE-CS) and the Editor-in-Chief of the Computer magazine. He organized many international conferences, including the World Computer Congress of International Federation for Information Processing (IFIP) and the annual international IEEE Computer Software and Applications Conference (COMPSAC). 

His current research is in software engineering, service-based systems, mobile ad hoc networks, adaptive middleware, ubiquitous computing and trustworthy computing. He has published over 200 papers and received numerous awards, including Louis E. Levy Medal of the Franklin Institute, Richard E. Merwin Award of the IEEE-CS, IEEE Centennial Medal and Third Millennium Medal, Tsutomu Kanai Award of the IEEE-CS, and Outstanding Contributions Award of the Chinese Computer Federation.  He is a life fellow of the IEEE and a fellow of American Association for the Advancement of Science.  He received the Ph.D. degree in electrical engineering from University of Illinois, Urbana.

W. T. Tsai：

W. T. Tsai is currently Professor of Computer Science and Engineering in the School of Computing and Informatics at Arizona State University, Tempe, AZ 85287. He is also a Guest Professor at Tsinghua University. He received his Ph.D. in Computer Science from University of California at Berkeley. His recent research area is service-oriented computing particularly related to service-oriented system engineering techniques such as modeling, application architecture, simulation, testing, policy management, and collaboration.