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Vacuum tube numbering systems

Vacuum Tube / Thermionic Valves Includes:BasicsHow does a tube workVacuum tube electrodesDiode valve / tubeTriodeTetrodeBeam TetrodePentodeEquivalentsPin connectionsNumbering systemsValve sockets / basesIn order that vacuum tubes or thermionic valve numbering had some reason to it, numbering schemes were developed.
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NASA Cancels All-Female Spacewalk Due to Lack of Spacesuits

There aren& 39;t enough medium sized suits to go around.By Jessica MileyMarch 26, 2019NASA has canceled its historic all-female spacewalk because it doesn& 39;t have enough space suit to fit the astronauts. NASA had announced earlier this month that astronauts Christina Koch and Anne McCain would perform the first ever all-female spacewalk.
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Keeping Roads Smooth Reduces Greenhouse Emissions

A new report shows well-maintained roads can help mitigate climate change.By Jessica MileyJanuary 18, 2019Maintaining roads to a high standard can help reduce emissions that cause climate change a new Rutgers-led report has found.Maintaining road surfaces can reduce greenhouse gases by up to 2 percent; the report that is published in the International Journal of Sustainable Transportation states.
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California Encourages Next Generation of Cybersecurity Experts

California is helping students find a career in cybersecurity.By Jessica MileyFebruary 20, 2019Cybersecurity is increasingly an important issue. From personal computer use to large corporations the threats from cybersecurity are more and more potentially damaging.SEE ALSO: IOT AND CYBER RISK: ESTABLISHING COMMUNICATION BETWEEN THE CISO AND THE RISK MANAGERThis is especially true for governments managing the infrastructure that provides essential services for large populations.
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ESD Protected Area, EPA

ESD Tutorial Includes:ESD BasicsHow ESD affects electronics componentsProtecting against ESDESD protected areaESD workbenchESD work matESD wrist strapESD clothingESD storageESD processESD on a budgetDesign to combat ESDAn ESD protected area, ESDPA or just EPA is an area set up in a facility that is protected from the effects of static.
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Did President Trump Just "Out" the Top-Secret KH-11 Program?

Last week wasn& 39;t the greatest week for U.S. President Donald Trump. First, he urged residents of the state of Alabama to take cover from Hurricane Dorian, when in fact, Alabama is several hundred miles west of the U.S. east coast.Then, on Friday August 30, 2019, the president tweeted a picture showing a failed launch explosion that took place at the Iranian Semnan Launch Site One:The United States of America was not involved in the catastrophic accident during final launch preparations for the Safir SLV Launch at Semnan Launch Site One in Iran.
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