Edward Appleton: A Short Biography

Edward Appleton was a British physicist who made significant contributions to the study of the ionosphere. In 1947, he was awarded the Nobel Prize in Physics for his investigations of the physics of the upper atmosphere, especially for the discovery of the Appleton layer of the ionosphere. Appleton conducted research on radio wave propagation and the behavior of the ionosphere, which is the upper region of Earth's atmosphere consisting of charged particles. He discovered that the ionosphere is composed of several layers with varying ionization densities. One of these layers, known as the Appleton layer or F2 layer, is situated at an altitude of around 200 to 400 kilometers (120 to 250 miles) and is important for long-distance radio communication. Appleton's work on the ionosphere and its impact on radio waves laid the foundation for advancements in radio communication, including the development of techniques like skywave propagation, which allows radio signals to be transmitted over long distances by bouncing them off the ionosphere. us article, "The Intel 8080 Microprocessor and the MCS-80 Family", in which he predicted that the number of transistors on a microchip would double every two years, leading to exponential growth in computing power. This prediction, known as Moore's Law, has proven remarkably accurate over the past several decades and has become a guiding principle of the technology industry.

Moore retired from Intel in 1997 but has remained active in the field of science and technology. He has received numerous honors and awards, including the National Medal of Technology and Innovation in 1990 and the Presidential Medal of Freedom in 2002. Today, Gordon Moore is widely recognized as one of the most influential figures in the history of the semiconductor industry.

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AI Technical Trustability Update

While working on an update to my RF Cafe Espresso Engineering Workbook project to add a couple calculators about FM sidebands (available soon). The good news is that AI provided excellent VBA code to generate a set of Bessel function plots. The bad news is when I asked for a table showing at which modulation indices sidebands 0 (carrier) through 5 vanish, none of the agents got it right. Some were really bad. The AI agents typically explain their reason and method correctly, then go on to produces bad results. Even after pointing out errors, subsequent results are still wrong. I do a lot of AI work and see this often, even with subscribing to professional versions. I ultimately generated the table myself. There is going to be a lot of inaccurate information out there based on unverified AI queries, so beware.

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