A comprehensive reference for electrical and electronic engineers and other professionals, technicians, and students involved with power electronics. Encompasses power semiconductor devices, electrical machines, converter circuits, pulse width modification techniques, AC machine drives, simulation techniques, estimation and identification, microprocessors, and artificial intelligence techniques. The reader is assumed to have a basic knowledge of power electronics and variable frequency drives. Teeming with diagrams, equations and formulae, and references. Annotation copyright by Book News, Inc., Portland, OR

Global Information Infrastructure: The Birth, Vision and Architecture addresses three levels of the information superhighway in terms of their information content and technological implementations. This book is a futuristic view of the major components of the new global world.

Will the emerging global information infrastructure (GII) create a revolution in communication equivalent to that wrought by Gutenberg, or will the result be simply the evolutionary adaptation of existing behavior and institutions to new media? Will the GII improve access to information for all? Will it replace libraries and publishers? How can computers and information systems be made easier to use? What are the trade-offs between tailoring information systems to user communities and standardizing them to interconnect with systems designed for other communities, cultures, and languages? This book takes a close look at these and other questions of technology, behavior, and policy surrounding the GII. Topics covered include the design and use of digital libraries; behavioral and institutional aspects of electronic publishing; the evolving role of libraries; the life cycle of creating, using, and seeking information; and the adoption and adaptation of information technologies. The book takes a human-centered perspective, focusing on how well the GII fits into the daily lives of the people it is supposed to benefit. Taking a unique holistic approach to information access, the book draws on research and practice in computer science, communications, library and information science, information policy, business, economics, law, political science, sociology, history, education, and archival and museum studies. It explores both domestic and international issues. The author's own empirical research is complemented by extensive literature reviews and analyses.

This book explains the rapidly changing, complex flow of information in the context of 21st-century culture, policy, technology, and economics—an essential resource for librarians and information specialists in all types of settings. The role of information professionals today is to interact creatively with clientele: to help them navigate the information infrastructure. Shattering the concept of the library as a place, Evolving Global Information Infrastructure and Information Transfer describes "the library" as transformed to a dynamic virtual presence in the information infrastructure, where people are the most important resources in a digital library or information center—not the collections. Instead of focusing on specific technologies, which are always changing, this book examines the "big picture" of how information is created, recorded, mass produced, distributed, and utilized in society. This unique approach enables readers to better understand how they fit into this changing world, to envision their place in the digital age, and to assume a leadership role that ensures the success of their clients as well as themselves. This standout work is ideally suited for all types of librarians, educators, information workers, members of the research community, and policymakers in public and private sector organizations.

While societies have always had information infrastructures, the power and reach of today's information technologies offer opportunities to transform work and family lives in an unprecedented fashion. This volume, a collection of six papers presented at the 1994 National Academy of Engineering Meeting Technical Session, presents a range of views on the subject of the revolution in the U.S. information infrastructure. The papers cover a variety of current issues including an overview of the technological developments driving the evolution of information infrastructures and where they will lead; the development of the Internet, particularly the government's role in its evolution; the impact of regulatory reform and antitrust enforcement on the telecommunications revolution; and perspectives from the computer, wireless, and satellite communications industries.