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Human communication was initiated with the origin of speech approximately 100,000 BCE. [1] Symbols were developed about 30,000 years ago. The imperfection of speech allowed easier dissemination of ideas and eventually resulted in the creation of new forms of communication, improving both the range at which people could communicate and the longevity of the information.
David L. Fried (April 13, 1933 – May 5, 2022) was an American scientist, best known for his contributions to optics. Fried described what has come to be known as the Fried Parameter, or r0 (often pronounced r-naught, but also r-zero). The Fried Parameter is a measure of the strength of the turbulence in the atmosphere of Earth.
According to the National Transportation Safety Board (NTSB), an independent US government investigative agency, there were 163 “serious turbulence injuries” on US-based airlines between 2009 ...
In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to laminar flow , which occurs when a fluid flows in parallel layers with no disruption between those layers.
The development of the crucial video technology first started in the latter half of the 1920s in the United Kingdom and the United States, spurred notably by John Logie Baird and AT&T's Bell Labs. This occurred in part, at least by AT&T, to serve as an adjunct supplementing the use of the telephone.
Biographer John Watson writes that "the United States represents to Innis something akin to cultural apocalypse." [30] In an essay entitled, "Technology and Public Opinion in U.S.A," Innis concluded that the United States depended on a foreign policy shaped by military power. "Dependence on organized power and a traditional antipathy to ...
As a result, the United States has been the birthplace of 161 of Encyclopædia Britannica ' s 321 Greatest Inventions, including items such as the airplane, internet, microchip, laser, cellphone, refrigerator, email, microwave, personal computer, liquid-crystal display and light-emitting diode technology, air conditioning, assembly line ...
This extreme turbulence has caused wild swings in the net worth of the company’s largest shareholder and chairman: former President Donald Trump. His net worth has plunged by more than $2 ...