The flood of information through various computer networks such as the In ternet characterizes the world situation in which we live. Information worlds, often called virtual spaces and cyberspaces, have been formed on computer networks. The complexity of information worlds has been increasing almost exponentially through the exponential growth of computer networks. Such nonlinearity in growth and in scope characterizes information worlds. In other words, the characterization of nonlinearity is the key to understanding, utiliz ing and living with the flood of information. The characterization approach is by characteristic points such as peaks, pits, and passes, according to the Morse theory. Another approach is by singularity signs such as folds and cusps. Atoms and molecules are the other fundamental characterization ap proach. Topology and geometry, including differential topology, serve as the framework for the characterization. Topological Modeling for Visualization is a textbook for those interested in this characterization, to understand what it is and how to do it. Understanding is the key to utilizing information worlds and to living with the changes in the real world. Writing this textbook required careful preparation by the authors. There are complex mathematical concepts that require designing a writing style that facilitates understanding and appeals to the reader. To evolve a style, we set as a main goal of this book the establishment of a link between the theoretical aspects of modern geometry and topology, on the one hand, and experimental computer geometry, on the other.
Computer Science Workbench is a monograph series which will provide you with an in-depth working knowledge of current developments in computer technology. Every volume in this series will deal with a topic of importance in computer science and elaborate on how you yourself can build systems related to the main theme. You will be able to develop a variety of systems, including computer software tools, computer graphics, computer animation, database management systems, and computer-aided design and manufacturing systems. Computer Science Workbench represents an important new contribution in the field of practical computer technology. TOSIYASU L. KUNII Preface The evolution of database systems research is itself a story. Long after the emergence of systems derived from practical applications, Codd's relational data model has gradually occupied the theoretical domain of database systems and is moving into the realms of practical use. Certainly, the theoretical foundation makes database design, validation, and testing easier. However, Cod d's model allows only fiat tables to be handled, while most business and engineering data in practice are in nested table forms. Thus, a recent major obstacle in database systems development is the large gap between the theory and the practice.
A good introduction to a new product or concept is vital. This is particularly true for a versatile software system such as UNIX. UNIX provides the depth and intelligence to make your computer work hard for you. It will help you create software and help you use your office automation equipment to create and edit documents. For your intro duction to UNIX, you want a great little book. That is what this work is meant to be. This book is designed for non-computer specialists, especially for executives, ad ministrators and managers who want to make better use of their software specialists and experts. The way this Springer edition has come to be published is itself a story. Back about 1980, the founder and president of one of the more successful microcomputer companies, Mr. Kazue Ishii of CEC, wanted to start somethig that would be brilliant, sophisticated, innovative, and which would grow steadily. Out of many proposals, the one he accepted happened to be mine. The proposal was to build a family of network workstations for computer-aided design/manufacturing and office automation. UNIX was to be used as a software generator. But he had a hard time understanding UNIX, what good it is and how good it is ... Spending a significant amount of time with a popular computer columnist, Miss Yukari Shirota, I compiled this book for him. I found this book generally useful for top executives, managers, planners and office administrators whose background is outside software engineering. Dr.
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