Engineering and Science

• Computer history
• Software Tools for Line Drawings
• Advice to young electronic engineers
• Example Digital Filters
• Complex Digital Filters Using Isolated Poles and Zeroes (pdf)
• Derivation of Complex Isolated IIR Pole (pdf)
• The Relation Between IIR Pole and FIR Zero (pdf)
• Digital Filter Sound Effects
• a challenge for programmers
• Measurement of the Capacitance between a Grapefruit and the Great Beyond
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