What is a semaphore? #ShawnHymel #electronics #engineering #maker
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What is a semaphore? #ShawnHymel #electronics #engineering #maker
A semaphore is a synchronization primitive similar to a mutex, but it can count beyond just 0 and 1 (what mutexes are limited to). While a mutex acts like a single key to a restroom, a semaphore is like having multiple keys that can unlock multiple bathrooms in a shopping complex. Semaphores are used to control access to critical resources or ...
17.7K views1 month ago
Railway Semaphore Signal History
19K views · 324 reactions | SEMAPHORE SIGNAL SUNDAY at The Spa Country Railway Daylesford, Australia. #train #railway #railroad | Schony747 Youtube & DVD | Facebook
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19K views · 324 reactions | SEMAPHORE SIGNAL SUNDAY at The Spa Country Railway Daylesford, Australia. #train #railway #railroad | Schony747 Youtube & DVD | Facebook
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7.8K views1 week ago
Stop!!! The iconic beauty of the semaphore railway signal. Becoming very rare on the main rail network, but still found working on heritage rail lines. Also, no model railway is complete without them!!#uktrainspotting #trains #diesellocomotive #britishrailways #railway #railways #trainspotting #railroad #modelrailway | Adrian Watson
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Stop!!! The iconic beauty of the semaphore railway signal. Becoming very rare on the main rail network, but still found working on heritage rail lines. Also, no model railway is complete without them!!#uktrainspotting #trains #diesellocomotive #britishrailways #railway #railways #trainspotting #railroad #modelrailway | Adrian Watson
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73.7K viewsJul 13, 2024
#OnThisDay 1924: The 'pips' (aka the Greenwich Time Signal) began, soon to become an iconic part of radio's soundscape. Find out more about their interesting history here: https://www.bbc.com/historyofthebbc/anniversaries/february/the-pips/ | BBC Archive
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#OnThisDay 1924: The 'pips' (aka the Greenwich Time Signal) began, soon to become an iconic part of radio's soundscape. Find out more about their interesting history here: https://www.bbc.com/historyofthebbc/anniversaries/february/the-pips/ | BBC Archive
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80.3K viewsFeb 2, 2023
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Nearly two dozen community members surrounded a house on the 3100 block of Park Avenue in Minneapolis when Homeland Security Investigations officers detained an East African man. The man was detained in an apparent immigration action on Thursday afternoon. MPR News senior reporter Jon Collins and photojournalist Ben Hovland were accompanying a neighborhood ICE watch patrol through south Minneapolis when they received reports of the operation via several rapid response group chats. The officers b
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Nearly two dozen community members surrounded a house on the 3100 block of Park Avenue in Minneapolis when Homeland Security Investigations officers detained an East African man. The man was detained in an apparent immigration action on Thursday afternoon. MPR News senior reporter Jon Collins and photojournalist Ben Hovland were accompanying a neighborhood ICE watch patrol through south Minneapolis when they received reports of the operation via several rapid response group chats. The officers b
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Signal change Green to Red🚦 #railway #station #SIGNAL #change #green #red #bdrailway #railroad #trendingreelsvideo #bhairav | Train Premi Shaon
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7.2K views · 88 reactions | Before radio, visual line of sight signalling with signal lamps, flags, and these physical semaphore devices were used. The concept of signaling for long distance communication is ancient and used extensively during earlier conflicts like the Napoleonic era. A version of semaphore devices survived in modern time in the form of railway signals. #WW1 #WWI #ww1history #logistics #capcut | This Day In WWI | Facebook
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7.2K views · 88 reactions | Before radio, visual line of sight signalling with signal lamps, flags, and these physical semaphore devices were used. The concept of signaling for long distance communication is ancient and used extensively during earlier conflicts like the Napoleonic era. A version of semaphore devices survived in modern time in the form of railway signals. #WW1 #WWI #ww1history #logistics #capcut | This Day In WWI | Facebook
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4.2K views3 weeks ago