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© Mark Biegert and Math Encounters, 2013. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Mark Biegert and Math Encounters with appropriate and specific direction to the original content.
Category Archives: Electronics
Computing Useful Customer Analogies
Introduction Communicating scientific concepts to the public is a tough problem. One of the major issues is that people have a difficult time imagining the relative scale of things — just try to think of 1000 of something versus 10 … Continue reading
Posted in Electronics
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Lightning Protection Math
Introduction I get asked a lot of questions about the specific values that are used in engineering standards. At some level, you just meet the required values in these standards. You do not need to know why they were set … Continue reading
Posted in Electronics
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Calculator to Select Connector for Joining Wires
Introduction I have written dozens (hundreds?) of small Mathcad function to help me in my daily work. Since I plan to teach another Mathcad class soon, I am gathering examples that might be good to use as application examples. Yesterday, … Continue reading
Posted in Electronics
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A Couple of Examples of Characteristic Impedance Calculations in Mathcad
Introduction I have been doing some work that involves computing the characteristic impedances of cables. The work has involved creating some tables in Mathcad for comparison with tables from a government specification. Since I am always looking for real-life computations … Continue reading
Posted in Electronics
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Epidemiology and Cell Towers
Introduction I received a phone call from a cancer epidemiologist last Friday. He had received my name from a co-worker in his department who knows me. This researcher is in the process of researching a cancer cluster near a cell … Continue reading
Posted in Electronics
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Phone Line Impedance Levels: 600 Ohms and 900 Ohms
Introduction Engineering is a pretty conservative profession — I have been accused of “abhorring change”. Once something gets standardized it stays in place even when it does not make sense. This morning provided me a good example of this. Phone … Continue reading
Posted in Electronics
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Engineering Application of Conformal Mapping
Introduction I have a project that I am working on that involves the use of conformal mappings. I have long found the use of complex numbers in electrical engineering interesting. My first contact with an engineering application of conformal mappings … Continue reading
Posted in Electronics
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Battery Life Dissipated Under Varying Temperature Conditions
Introduction I am not getting any younger. As I age, I have come to realize that certain activities age me faster than others. For example, I have no doubt that sitting in meetings for hours every day has deleterious effects … Continue reading
Posted in Batteries, Electronics
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Battery Freezing Math
Introduction I live in a cold climate — so cold that under certain circumstances we can freeze our lead-acid batteries. A customer who lives in my region called recently and was wondering if I thought any of his batteries would … Continue reading
Russian Meteor Characteristics
Introduction A meteor exploded over Chelyabinsk, Russia, at 3:20 UTC on February 15, 2013. I have been reading accounts of the size, speed, and energy of the meteor. This post presents some simple calculations that verify the consistency of the … Continue reading
Posted in Astronomy, Electronics
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