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 Electrically Small, Superdirective, and Superconducting AntennasHarold Wheeler, in his classic 1947 papers, created the fi eld of electrically small antennas. This fi eld has long been important for frequencies below roughly 1 GHz, where a half-wavelength is about 6 inches. These electrically small antennas have characteristics in common that limit performance: low radiation resistance, high reactance, low effi... |  |  Cyberspace Textuality: Computer Technology and Literary TheoryComputers were once thought of as number-crunching machines; but for most of us it is their ability to create worlds and process words that have made them into a nearly indispensable part of life. As Jacques Leslie puts it, if computers are everywhere, it is because they have grown into "poetry machines." The term "cyberspace"... |  |  Relational Databases and Knowledge BasesA database management system (DBMS), or simply database system, is characterized by the data model it suports . The first DBMSs, designed in the 1960s, were based on hierarchical or network models and have been viewed as extensions of file systems in which interfile links are provided through pointers . The data manipulation languages of these... |
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 |  |  |  |  Unix UnleashedUnix Unleashed, Third Edition is written with the power user and system administrator in mind. This book will help the reader understand the nuances of the major Unix variants including SVR4, HP-UX, Solaris, AIX, BSD, IRIX, SunOS, and Linux. It will help the reader decide which Unix shell works best for their particular situation. Other topics such... |
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