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2004: First podcast, invented by Adam Curry and Dave Winer, is a program made available in digital format for download over the Internet and it usually features one or more recurring hosts engaged in a discussion about a particular topic or current event. [543] [544] [545] 2005: YouTube, the first popular video-streaming site, was founded
Fulton also invented an automatic river gauge while working for the U.S. Weather Bureau, and played a primary role in the development of the depth charge during World War I. [1] [2] His company, now called Fulton Bellows after numerous ownership changes, still operates in Knoxville, [3] as part of the United Flexible Group, which acquired it in ...
During the 1920s, significant advances were made in welding technology, including the introduction of automatic welding in 1920, in which electrode wire was fed continuously. Shielding gas became a subject receiving much attention, as scientists attempted to protect welds from the effects of oxygen and nitrogen in the atmosphere.
A welder is a person or equipment that fuses materials together.The term welder refers to the operator, the machine is referred to as the welding power supply.The materials to be joined can be metals (such as steel, aluminum, brass, stainless steel etc.) or varieties of plastic or polymer.
March 5 – Tennessee's first case of COVID-19 is confirmed in Williamson County, marking the start of the COVID-19 pandemic in Tennessee. 2023 March 27 – A mass shooting occurs at a private Presbyterian Church in America parochial school in Nashville, Tennessee, killing three children, three adults, and the perpetrator.
Conquistador Hernando de Soto, first European to visit Tennessee. In the 16th century, three Spanish expeditions passed through what is now Tennessee. [12] The Hernando de Soto expedition entered the Tennessee Valley via the Nolichucky River in June 1540, rested for several weeks at the village of Chiaha (near the modern Douglas Dam), and proceeded southward to the Coosa chiefdom in northern ...
1912 – Stainless steel invented by Harry Brearley; 1916 – Method for growing single crystals of metals invented by Jan Czochralski; 1919 – The merchant ship Fullagar has the first all welded hull. 1924 – Pyrex invented by scientists at Corning Incorporated, a glass with a very low coefficient of thermal expansion
A tea bag is a small, porous paper, silk or nylon sealed bag containing tea leaves for brewing tea. Tea bags were invented by Thomas Sullivan around 1903. The first tea bags were made from silk. Sullivan was a tea and coffee merchant in New York who began packaging tea samples in tiny silk bags, but many customers brewed the tea in them. [92]