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Day in Engineering History Archive - June 18

June 18

Day in Engineering History June 18 Archive - RF Cafe1815: Napoleon was defeated at Waterloo. 1873: Susan B. Anthony was fined $100 for attempting to vote. 1939: Co-discoverer of the radio reflecting properties of the ionosphere in the upper atmosphere (the Kennelly-Heaviside layer), and first to apply complex number analysis to AC circuits, Arthur Kennelly, died. 1940: Winston Churchill delivered his "Finest Hour" speech in the House of Commons. 1942: The U.S. Navy commissioned its first black officer, Harvard University medical student Bernard Whitfield Robinson, into the Reserves. 1959: The first telecast received from England was broadcast in the U.S. over NBC-TV. 1965: The first large solid-fuel rocket - a Titan 3C - was launched into orbit. 1983: Dr. Sally Ride became the first American woman in space, aboard the space shuttle Challenger. 2005: The EU agreed upon its first constitution. 2011: Analog design legend Bob Pease died. 2014: Stephanie Kwolek, inventor of Kevlar, died.

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Note: These historical tidbits have been collected from various sources, mostly on the Internet. As detailed in this article, there is a lot of wrong information that is repeated hundreds of times because most websites do not validate with authoritative sources. On RF Cafe, events with hyperlinks have been verified. Many years ago, I began commemorating the birthdays of notable people and events with special RF Cafe logos. Where available, I like to use images from postage stamps from the country where the person or event occurred. Images used in the logos are often from open source websites like Wikipedia, and are specifically credited with a hyperlink back to the source where possible. Fair Use laws permit small samples of copyrighted content.

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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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