Abdelsalam A. Helal – författare

Mobile communications havepermeated the globe in both business and social cultures. In only af ew short years, Japan aloneh ash ad more than ten million subscribers enter the mobilem arket. Such explosive popularity is an indication ofa strong commercial demand for communications in both the tethered and tetherless environments. Accompanying the vibrant growth in mobile communications is the growth in multimedia communications, includingthe Internet. Mobile and multime dia communications technologies are merging, making mobile computing ak ey phrasei n the coming advanced information communication era. Thegrowth i n these dynamic industries shows that achange in our chosen method of commu nications is already well advanced. Reading e mail and connecting to various information feeds have already become a part ofdaily business activities. We are trying to grasp theo verall picture of mobile computing. Its shape and form are just starting to appear as personal digital assistants (PDA), handheld personal computers (HPC), wireless data communication services, and com mercial software designed for mobile environments. We are at the cusp of vast popularization of "computers on the go." "Any time Anywhere Computing" provides the reader with an understand able explanationo ft he current developments and commercialization of mobile computing. Thec oret ec hnologies and applications needed to un derstand the industry are comprehensively addressed. Thebook emphasizes three infrastruc tures: (1) wireless communication network infrastructure, (2) terminal devices (or "computers on the go"), and (3) software middleware and architectures that support wireless and mobile computing.

This text organizes and surveys the spectrum of replication protocols and systems that achieve high availability by replicating entities in failure-prone distributed computing environments. The entities discussed in this book vary from passive untyped data objects, to typed and complex objects, to processes and messages. It contains definitions and introductory material suitable for a beginner, theoretical foundations and algorithms, an annotated bibliography of commercial and experimental prototype systems, as well as short guides to recommended further readings in specialized subtopics. This book can be used as recommended or required reading in graduate courses in academia, as well as a handbook for designers and implementors of systems that must deal with replication issues in distributed systems.

Great advances have been made in the database field. Relational and object- oriented databases, distributed and client/server databases, and large-scale data warehousing are among the more notable. However, none of these advances promises to have as great and direct an effect on the daily lives of ordinary citizens as video databases. Video databases will provide a quantum jump in our ability to deal with visual data, and in allowing people to access and manipulate visual information in ways hitherto thought impossible. This study gives practical information on academic research issues, commercial products that have already been developed, and the applications of future research and development. This book can also be considered a reference text for those entering the field of video or multimedia databases, as well as a reference for practitioners who want to identify the kinds of products needed in order to utilize video databases.

Replication Techniques in Distributed Systems organizes and surveys the spectrum of replication protocols and systems that achieve high availability by replicating entities in failure-prone distributed computing environments. The entities discussed in this book vary from passive untyped data objects, to typed and complex objects, to processes and messages. Replication Techniques in Distributed Systems contains definitions and introductory material suitable for a beginner, theoretical foundations and algorithms, an annotated bibliography of commercial and experimental prototype systems, as well as short guides to recommended further readings in specialized subtopics. This book can be used as recommended or required reading in graduate courses in academia, as well as a handbook for designers and implementors of systems that must deal with replication issues in distributed systems.

Great advances have been made in the database field. Relational and object- oriented databases, distributed and client/server databases, and large-scale data warehousing are among the more notable. However, none of these advances promises to have as great and direct an effect on the daily lives of ordinary citizens as video databases. Video databases will provide a quantum jump in our ability to deal with visual data, and in allowing people to access and manipulate visual information in ways hitherto thought impossible. Video Database Systems: Issues, Products and Applications gives practical information on academic research issues, commercial products that have already been developed, and the applications of the future driving this research and development. This book can also be considered a reference text for those entering the field of video or multimedia databases, as well as a reference for practitioners who want to identify the kinds of products needed in order to utilize video databases. Video Database Systems: Issues, Products and Applications covers concepts, products and applications. It is written at a level which is less detailed than that normally found in textbooks but more in-depth than that normally written in trade press or professional reference books. Thus, it seeks to serve both an academic and industrial audience by providing a single source of information about the research issues in the field, and the state-of-the-art of practice.