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Version du 1 juillet 2022 à 08:21
⚓️ in my commonplace book . Gregorian-calendar
Learning
Morse code is an old system of encoding messages that is used to send telegraphic information using signals and rhythm. In written communication, Morse code uses dots and dashes to represent a limited number of alphabet letters, numbers, punctuation and special characters of a given message. When messages are sent by sound, radio signals or light flashes, dots are short beeps or clicks or flashes, and dashes are longer ones. For example, Wikipedia written in Morse code is .-- .. -.- .. .--. . -.. .. .-
Morse code is named after Samuel Morse, who helped invent it. It is not used as much today as it was in the 19th and 20th centuries. Teletypewriters were invented in the early 20th century with their own codes and gradually replaced Morse code. Other types of technology that are easier to use for communication became even more common.
Some amateur radio operators still use Morse code to communicate and were previously required to learn and pass telegraphy exams to qualify their licenses. The requirements were lifted after 2003.[1]
There are different types of Morse code for some different countries.
There are three different symbols in Morse code; there's a short one, usually called 'dit', a long one, called 'dah', and the pause. A dah is three times as long as a dit, and the pause has the same length as the dit.
Today, Morse codes can be easily generated through smartphone applications or through a web application, which take text as input and outputs the Morse code in copyable text or downloadable audio form. Its usage as a method of sending secret messages has become obsolete in favor of more powerful encryption techniques provided by advanced modern computer machines.
Different ways to send Morse code
Morse code can be sent in different ways. On ships, flickering lights were often used instead of radio communication.
The history of the S.O.S
The S.O.S as it is used today, was introduced by the Imperial German Marine in 1904. It was mandatory for all German ships starting in 1905. It was meant as a distress signal, and should be repeated until all other stations stopped sending. Afterwards the real message would be sent. Also, there is no pause between the characters.
At the time, the market was controlled by two companies; one was Telefunken, and the other was Marconi. Marconi was under British control, Telefunken was German. Marconi used CQD as a distress signal.
The people doing the communication were employees of either Marconi or Telefunken; they were not employed by the ships' owners. These operators were not allowed to answer calls sent by the competing company, which also included distress signals. As this was against the laws of the sea, a conference in Berlin decided to use the German distress signal internationally. This started in 1908. When the ship Republic sent a distress signal in 1909, it was still CQD, and the Titanic also sent CQD at first, in 1912.
The first ship to use the new signal was the RMS Slavonia, in 1909.
Replacing the S.O.S signal
The Global Maritime Distress and Safety System (GMDSS) is a satellite-based system that was introduced in 1999 to handle distress situations. It defines four different regions, three of which are covered by satellite. The fourth, which covers the polar regions, is covered by shortwave radio. With the introduction of GMDSS, the S.O.S signal is no longer used.
References
- ↑ "A Brief History of Amateur Radio | Marin Amateur Radio Society". Retrieved 2020-12-28.
👋 Hi and welcome in my digital garden.
📖 Reading
« 🎲🎲🎲 14. N'apprécie que ce qui dure. »
— Derek
How to live -> (Derek:h)
Bibliothèque (laughing)
2019 (Verticales) : Gas Station Chronicles
Chroniques d’une station-service (Gas Station Chronicles) gives voice to a gas-station attendant, Beauvoire, whose literary nickname does not change a thing from his daily routine: managing through the control-screens the comings and goings of drivers, dealing with the cash register or the bar. This Gas Station, located in the northern suburbs of Paris, could become the epicenter of a social drama or an adreline-fuelled robbery, but the author has preferred to make it the ideal observation tower of the modern world through the eyes of a person far from ordinary. With his contemplative attitude, Beauvoire scrutinizes and comments on the apparent inertia of everyday life. He tracks bits of transcendence or involuntary poetry in the speeches and attitudes of customers. Hence the amused or even diverted references of our gas-station philosopher to the writings of Jean Baudrillard or to a biography of Scott Fitzgerald, as well as the erudite debates with his friend Nietzland during their endless board-games.
Turning the art of brief into an authentic novel, tender and caustic, Chroniques d’une station-service is an attempt to exhaust the possibilities of a typical ‘non-place’, of a society in lack of inner-fuel and true meaning. Through small impressionist touches, the author explores the field of sub-ordinary life, with its failures and pretenses, to extract the raw material of a vivid and funny imagination.
It is a real pleasure to read, a dazzling discovery, at the same time as a cry for help.— Le Figaro
J'ai énormément ri - F. Beigbeder (Le Masque et la Plume)
notes
- ↑ https://christopheducamp.com/now is my now page on the public web.
What is a now page > https://nownownow.com/about
Most websites have a link that says “about”. It goes to a page that tells you something about the background of this person or business. For short, people just call it an “about page”.
Most websites have a link that says “contact”. It goes to a page that tells you how to contact this person or business. For short, people just call it a “contact page”.
So a website with a link that says “now” goes to a page that tells you **what this person is focused on at this point in their life.** For short, we call it a “now page”.
See examples by browsing nownownow.com.
Although it’s normal to make the web address “/now”, just like it’s usually “/about” and “/contact” in those other examples, the URL could be anything.