National Radio Institute
The National Radio Institute-McGraw Hill Continuing Education Center was a private, postsecondary, for-profit correspondence school based in Washington, DC from 1914 to 2002. The school originally trained students to become radio operators and technicians. (In 1922, the term "radiotrician" was coined for NRI graduates and registered with the U.S. patent office in 1928). NRI conducted training courses via mailed lessons, a form of asynchronous learning. NRI's initial home-study course offerings were in radio (transmitter and receiver) repair, as well as radio telegraphy & telephony. These courses were designed to be comprehensive, covering all facets of radio technology, including radio operation, broadcasting, manufacturing, sales, and service. An F.C.C. license exam preparation course was implemented and, in time, more courses were added for students to become tradesmen in the broader field of electronic equipment servicing, including TV/VCR repair, basic electronics, automation & ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Amazing Stories V01 N01 Front Cover National Radio Institute
Amazing may refer to: Music Performers * The Amazing, a Swedish indie rock band Albums * ''Amazing'' (Banaroo album), 2006 * ''Amazing'' (Elkie Brooks album), 1996 * ''Amazing'' (Marcia Hines album) or the title song, 2014 * ''Amazin'' (Trina album) or the title song, 2010 * '' Amazing: The Best of Alex Lloyd'' or the title song (see below), 2006 Songs * "Amazing" (Aerosmith song), 1993 * "Amazing" (Alex Lloyd song), 2001 * "Amazing" (Danny Saucedo song), 2012 * "Amazing" (Foxes song), 2016 * "Amazing" (Francesca Michielin song), 2014 * "Amazing" (George Michael song), 2004 * "Amazing" (High and Mighty Color song), 2007 * "Amazing" (Inna song), 2009 * "Amazing" (Josh Kelley song), 2003 * "Amazing" (Kanye West song), 2009 * "Amazin'" (LL Cool J song), 2003 * "Amazing" (Matt Cardle song), 2012 * "Amazing" (Seal song), 2007 * "Amazing" (Tanja song), representing Estonia at Eurovision 2014 * "Amazing" (Vanessa Amorosi song), 2011 * "Amazing" (Westlife song), 2006 ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

U Street (Washington, D
U Street or "U" Street is the 22nd of a sequence of alphabetical streets in many cities (or the 21st if "I" or "J" is omitted). It may refer to: * ''U Street (Washington, D.C.)'', a street in Washington, D.C. ** U Street (Washington, D.C.), commercial and residential district in northwest Washington, D.C. ** U Street (WMATA station), a Metro station in Washington, D.C. on the Green and Yellow lines See also * School of Hard Knocks or "University of the Streets" * University/65th Street, a station in Sacramento, California * Street University, a project of the Ted Noffs Foundation in New South Wales, Australia * Avenue U (other) * University Avenue (other) * University Street (other) University Street is a portion of Robert-Bourassa Boulevard in Montreal, Quebec, Canada. University Street may also refer to: * University Street, Donetsk, Ukraine, a road * University Street station, Seattle, Washington, United States, a transit ...

DuPont
DuPont de Nemours, Inc., commonly shortened to DuPont, is an American multinational chemical company first formed in 1802 by French-American chemist and industrialist Éleuthère Irénée du Pont de Nemours. The company played a major role in the development of Delaware and first arose as a major supplier of gunpowder. DuPont developed many polymers such as Vespel, neoprene, nylon, Corian, Teflon, Mylar, Kapton, Kevlar, Zemdrain, M5 fiber, Nomex, Tyvek, Sorona, Corfam and Lycra in the 20th century, and its scientists developed many chemicals, most notably Freon (chlorofluorocarbons), for the refrigerant industry. It also developed synthetic pigments and paints including ChromaFlair. In 2015, DuPont and the Dow Chemical Company agreed to a reorganization plan in which the two companies would merge and split into three. As a merged entity, DuPont simultaneously acquired Dow and renamed itself to DowDuPont on August 31, 2017, and after 18 months spin off the merged entity' ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

NRI Schools
NRI or Nri may refer to : * Kingdom of Nri, an Igbo kingdom that flourished between the 10th century and early 20th century * National Radio Institute, a now defunct post-secondary vocational correspondence school * National Resources Inventory * Needham Research Institute * Networked Readiness Index * Nomura Research Institute * Non-resident Indian * Non-roster invitee * Norepinephrine reuptake inhibitor A norepinephrine reuptake inhibitor (NRI, NERI) or noradrenaline reuptake inhibitor or adrenergic reuptake inhibitor (ARI), is a type of drug that acts as a reuptake inhibitor for the neurotransmitters norepinephrine (noradrenaline) and epineph ...

Proximity Fuze
A proximity fuze (or fuse) is a Fuze (munitions), fuze that detonates an Explosive material, explosive device automatically when the distance to the target becomes smaller than a predetermined value. Proximity fuzes are designed for targets such as planes, missiles, ships at sea, and ground forces. They provide a more sophisticated trigger mechanism than the common contact fuze or timed fuze. It is estimated that it increases the lethality by 5 to 10 times, compared to these other fuzes. Background Before the invention of the proximity fuze, detonation was induced by direct contact, a timer set at launch or an altimeter. All of these earlier methods have disadvantages. The probability of a direct hit on a small moving target is low; a shell that just misses the target will not explode. A time- or height-triggered fuze requires good prediction by the gunner and accurate timing by the fuze. If either is wrong, then even accurately aimed shells may explode harmlessly before reaching ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

National Bureau Of Standards
The National Institute of Standards and Technology (NIST) is an agency of the United States Department of Commerce whose mission is to promote American innovation and industrial competitiveness. NIST's activities are organized into physical science laboratory programs that include nanoscale science and technology, engineering, information technology, neutron research, material measurement, and physical measurement. From 1901 to 1988, the agency was named the National Bureau of Standards. History Background The Articles of Confederation, ratified by the colonies in 1781, provided: The United States in Congress assembled shall also have the sole and exclusive right and power of regulating the alloy and value of coin struck by their own authority, or by that of the respective states—fixing the standards of weights and measures throughout the United States. Article 1, section 8, of the Constitution of the United States, ratified in 1789, granted these powers to the new Congre ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Harry Diamond (engineer)
Harry Diamond (12 February 1900 – 21 June 1948) was an American radio pioneer and inventor, and namesake for Diamond Ordnance Fuze Laboratories, which later became part of the Army Research Laboratory. Early life Diamond, the son of a Jewish tailor in Minsk, was born on February 12, 1900. In 1908 his family immigrated to the United States, and he grew up in Quincy, Massachusetts. Diamond enlisted in the United States Army on October 14, 1918 and was honorably discharged on December 9, 1918. He graduated with a degree in Electrical Engineering from Massachusetts Institute of Technology in 1922. Diamond worked for the General Electric company for 18 months. He completed his master's degree in Electrical Engineering in 1925 and worked as an Electrical Engineering instructor for 4 years at Lehigh University in electrical engineering. Bureau of Standards He joined the National Bureau of Standards in 1927. Diamond headed up the research and development work of the Commerce Departme ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Philo Farnsworth
Philo Taylor Farnsworth (August 19, 1906 – March 11, 1971) was an American inventor and television pioneer. He made many crucial contributions to the early development of all-electronic television. He is best known for his 1927 invention of the first fully functional all-electronic image pickup device (video camera tube), the image dissector, as well as the first fully functional and complete all-electronic television system.Burns, R. W. (1998), ''Television: An international history of the formative years''. IET History of Technology Series, 22. LondonThe Institution of Engineering and Technology (IET) p. 370. . Farnsworth developed a television system complete with receiver and camera—which he produced commercially through the Farnsworth Television and Radio Corporation from 1938 to 1951, in Fort Wayne, Indiana. In later life, Farnsworth invented a small nuclear fusion device, the Farnsworth–Hirsch fusor, employing inertial electrostatic confinement (IEC). Like many fusi ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Alfred Norton Goldsmith
Alfred Norton Goldsmith (September 15, 1888 – July 2, 1974) was a noted American electrical engineer. Goldsmith was born in New York City, received his B.S. in 1907 from the College of the City of New York and in 1911 his Ph.D. from Columbia University where he studied under Michael I. Pupin. He taught at City College from 1906 to 1923. In 1912 Goldsmith co-founded the Institute of Radio Engineers (IRE) and was the first editor of its proceedings, serving for 42 years. In 1914 he consulted as a radio engineer for the Atlantic Communication Company, and for the General Electric Company from 1915 to 1917. During World War I he was Technical Director of the United States Army Signal Corps School of Communication and the U. S. Naval Radio School at City College. After the war, Goldsmith became director of research for the Marconi Wireless Telegraph Company of America and in 1919 RCA's director of research. In 1923 he was named RCA's Chief Broadcast Engineer and in 1927 Chairm ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

George Owen Squier
Major General George Owen Squier (March 21, 1865 – March 24, 1934) was born in Dryden, Michigan, United States. He graduated from the United States Military Academy in the Class of 1887 and received a Ph.D. from Johns Hopkins University in 1893. He was famous both in the United States and in Europe as a soldier, a scientist and as an inventor. He is known for what today is called Muzak. Life and military career George Squier wrote and edited many books and articles on the subject of radio and electricity. An inventor, he and Dartmouth professor Albert Cushing Crehore developed a magneto-optical streak camera "The Polarizing Photo-chronograph" in 1896 to measure the speed of projectiles both inside a cannon and directly after they left the cannon barrel. This was one of the earliest photonic programs. They also worked to develop synchronous AC telegraphic systems. His biggest contribution was that of telephone carrier multiplexing in 1910 for which he was elected to the Natio ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Vacuum Tube
A vacuum tube, electron tube, valve (British usage), or tube (North America), is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental electronic functions such as signal amplifier, amplification and current rectifier, rectification. Non-thermionic types such as a vacuum phototube, however, achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light intensities. In both types, the electrons are accelerated from the cathode to the anode by the electric field in the tube. The simplest vacuum tube, the diode (i.e. Fleming valve), invented in 1904 by John Ambrose Fleming, contains only a heated electron-emitting cathode and an anode. Electrons can only flow in one direction through the device—fro ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Triode
A triode is an electronic amplifying vacuum tube (or ''valve'' in British English) consisting of three electrodes inside an evacuated glass envelope: a heated filament or cathode, a grid, and a plate (anode). Developed from Lee De Forest's 1906 Audion, a partial vacuum tube that added a grid electrode to the thermionic diode (Fleming valve), the triode was the first practical electronic amplifier and the ancestor of other types of vacuum tubes such as the tetrode and pentode. Its invention founded the electronics age, making possible amplified radio technology and long-distance telephony. Triodes were widely used in consumer electronics devices such as radios and televisions until the 1970s, when transistors replaced them. Today, their main remaining use is in high-power RF amplifiers in radio transmitters and industrial RF heating devices. In recent years there has been a resurgence in demand for low power triodes due to renewed interest in tube-type audio systems by audiophi ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]