Don Lancaster

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What is PostScript: A Tutorial [Editor's Note: this article is an introduction to the PostScript language. In it, Don discusses PostScript features and its advantages, fonts, speed and the costs, how to get started and how to buy a decent PostScript printer. Copyright (C) 1990 by Don Lancaster and Synergetics, 3860 West First Street, Thatcher, AZ. 85552.(More)
Some recent studies have investigated the scale and scope of a remarkable series of late classic prehistoric (est. 1350 CE) water management structures found in Arizona’s upper Gila Valley. These canal systems are characterized by their being literally "hung" on the edges of steep sided, gently sloping mesas formed from remnant Quaternary age bajadas. The(More)
How Big is a one -Farad capacitor? Would you believe less than a cubic inch? Conventional wisdom and poorly done cartoons notwithstanding, a new capacitor technology is now available that crams incredible capacitance values into very small volumes. As Fig. 1 shows, these are called double -layer capacitors. They are both reasonably priced and available from(More)
Major goals of such digital sinewave generation including offering the maximum possible efficiency by using the fewest of simplest possible switching transitions; offering the lowest possible distortion by zeroing out a maximum number of low harmonics that impact power quality, whine, vibration, and circulating currents; and by using all digital techniques(More)
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