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Chapter 1 places into perspective a total Information Storage and Retrieval System. This perspective introduces new challenges to the problems that need to be theoretically addressed and commercially implemented. Ten years ago commercial implementation of the algorithms being developed was not realistic, allowing theoreticians to limit their focus to very specific areas. Bounding a problem is still essential in deriving theoretical results. But the commercialization and insertion of this technology into systems like the Internet that are widely being used changes the way problems are bounded. From a theoretical perspective, efficient scalability of algorithms to systems with gigabytes and terabytes of data, operating with minimal user search statement information, and making maximum use of all functional aspects of an information system need to be considered. The dissemination systems using persistent indexes or mail files to modify ranking algorithms and combining the search of structured information fields and free text into a consolidated weighted output are examples of potential new areas of investigation. The best way for the theoretician or the commercial developer to understand the importance of problems to be solved is to place them in the context of a total vision of a complete system. Understanding the differences between Digital Libraries and Information Retrieval Systems will add an additional dimension to the potential future development of systems. The collaborative aspects of digital libraries can be viewed as a new source of information that dynamically could interact with information retrieval techniques.
In the Information Age, information is power. Who produces all that information, how does it move around, who uses it, to what ends, and under what constraints? Who gets that power? And what happens to the people who have no access to it? Disconnected begins with a striking vignette of two men: One is the thriving manager of a company selling personal computers and computer services. The other is just one among thousands of starving laborers. He has no way to find the information that might help him find a job, he cannot afford newspapers, rarely sees television, cannot understand the dialect of local radio broadcasts, will probably never touch a computer. These two men happen to live in Windhoek, Namibia, but this is not a story about Africa--it is a story that could be repeated almost anywhere in the world, even next door. With vivid anecdotes and data, William Wresch contrasts the opportunities of the information-rich with the limited prospects of the information-poor. Surveying the range of information--personal, public, organizational, commercial---that has become the currency of exchange in today's world, he shows how each represents a form of power. He analyzes the barriers that keep people information-poor: geography, tyranny, illiteracy, psychological blinders, "noise," crime. Technology alone, he demonstrates, is not the answer. Even the technology-rich do not always get access to important information--or recognize its value. Wresch spells out the grim consequences of information inequity for individuals and society. Yet he ends with reasons for optimism and stories of people who are working to pull down the impediments to the flow of information.
The hypermedia authoring process has been vividly described in a special issue of the Economist as a combination of writing a book, a play, a film, and a radio or television show: A hypermedia document combines all these elements and adds some of its own. The author' s first job is to structure and explain all of the infor mation. The author then must distill the information into brief, descriptive nodes. Each node has to contain a Iist of the ingredients, and instructions on how the ingredients are mixed together to the greatest advantage. The structure of the material provided is translated into an architectural metaphor of some kind; much of the designer' s work is the creation of this imaginary space. Then, the designers must chart the details of what to animate, what to film, who to inter view, and how to arrange the information in the space tobe built [Eco95a]. This book presents guidelines, tools, and techniques for prospective authors such that they can design better hypermedia documents and applications. lt surveys the different techniques used to organize, search, and structure infor mation in a large information system. It then describes the algorithms used to locate, reorganize, and link data to enable navigation and retrieval. It Iooks in detail at the creation and presentation of certain types of visual information, namely algorithm animations. It introduces new mechanisms for editing audio and video data streams.
Governments have done much to leverage information technology to deploy e-government services, but much work remains before the vision of e-government can be fully realized. Information Technology Research, Innovation, and E-government examines the emerging visions for e-government, the technologies required to implement them, and approaches that can be taken to accelerate innovation and the transition of innovative information technologies from the laboratory to operational government systems. In many cases, government can follow the private sector in designing and implementing IT-based services. But there are a number of areas where government requirements differ from those in the commercial world, and in these areas government will need to act on its role as a "demand leader." Although researchers and government agencies may appear to by unlikely allies in this endeavor, both groups have a shared interest in innovation and meeting future needs. E-government innovation will require addressing a broad array of issues, including organization and policy as well as engineering practice and technology research and development, and each of these issues is considered in the book.
This book covers significant recent developments in the field of Intelligent Meth ods applied to eCommerce. The Intelligent Methods considered are mainly Soft Computing Methods that include fuzzy sets, rough sets, neural networks, evolutionary computations, probabilistic and evidential reasoning, multivalued logic, and related fields. There is not doubt about the relevance of eCommerce in our daily environ ments and in the work carried out at many research centers throughout the world. The application of AI to Commerce is growing as fast as the computers and net works are being integrated in all business and commerce aspects. We felt that it was time to sit down and see how was the impact into that field of low-level AI, i.e. softcomputing. We found many scattered contributions disseminated in con ferences, workshops, journal, books or even technical reports, but nothing like a common framework that could serve as a basis for further research, comparison or even prototyping for a direct transfer to the industry. We felt then the need to set up a reference point, a book like this. We planned this book as a recompilation of the newest developments of re searchers who already made some contribution into the field. The authors were se lected based on the originality and quality of their work and its relevance to the field. Authors came from prestigious universities and research centers with differ ent backgrounds.