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Oswald Garrison Villard, Jr.
Oswald Garrison "Mike" Villard Jr. (September 17, 1916 – January 7, 2004) was an American professor of electrical engineering at Stanford University. Early life and education Villard was born in Dobbs Ferry, New York, to a distinguished family. He was the great-grandson of William Lloyd Garrison, the famed abolitionist, and the grandson of Henry Villard, owner of the New York Evening Post and The Nation, who financed the work of Thomas Edison (by coincidence, Villard Jr's academic advisor was Terman, whose advisor was Bush, whose advisor was Kennelly, who worked for Edison). His father was Oswald Garrison Villard Sr., owner of Post and The Nation, a prominent Pacifist and civil rights activist. He became interested in electricity after he was given "Harper's Electricity Book for Boys"; when he was 12, the family chauffeur gave him a radio assembled from a kit. He initially attended Buckley School in New York City, and later went to The Hotchkiss School in Lakeville, Connecticut. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dobbs Ferry, New York
Dobbs Ferry is a village in Westchester County, New York, United States. The population was 10,875 according to the 2010 United States Census. In 2019, its population rose to an estimated 11,027. The village of Dobbs Ferry is located in, and is a part of, the town of Greenburgh. The village ZIP code is 10522. Most of the village falls within the boundaries of the Dobbs Ferry Union Free School District. Dobbs Ferry was ranked seventh in the list of the top 10 places to live in New York State for 2014, according to the national online real estate brokerage Movoto. Dobbs Ferry is also the first village in New York State certified as a Climate Smart Community and was granted in 2014 the highest level given out in the state. History Multiple groups of native peoples lived in what is now known as Dobbs Ferry since at least 4500BC. The most recent tribe who claimed territory of the area are the Wecquaesgeek, maintaining villages up until the 1600's. Numerous artifacts from the tribe con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederick Terman
Frederick Emmons Terman (; June 7, 1900 – December 19, 1982) was an American professor and academic administrator. He was the dean of the school of engineering from 1944 to 1958 and provost from 1955 to 1965 at Stanford University. He is widely credited (together with William Shockley) as being the father of Silicon Valley.Palo Alto History Project Early life Terman was born to and Anna Belle Minton Terman on June 7, 1900, in Indiana, U.S. His father, , a psychologist who studied gifted children and popularize ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stealth Technology
Stealth technology, also termed low observable technology (LO technology), is a sub-discipline of military tactics and passive and active electronic countermeasures, which covers a range of methods used to make personnel, aircraft, ships, submarines, missiles, satellites, and ground vehicles less visible (ideally invisible) to radar, infrared, sonar and other detection methods. It corresponds to military camouflage for these parts of the electromagnetic spectrum (i.e., multi-spectral camouflage). Development of modern stealth technologies in the United States began in 1958, where earlier attempts to prevent radar tracking of its U-2 spy planes during the Cold War by the Soviet Union had been unsuccessful. Designers turned to developing a specific shape for planes that tended to reduce detection by redirecting electromagnetic radiation waves from radars. Radiation-absorbent material was also tested and made to reduce or block radar signals that reflect off the surfaces of air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stanford Research Institute
SRI International (SRI) is an American nonprofit scientific research institute and organization headquartered in Menlo Park, California. The trustees of Stanford University established SRI in 1946 as a center of innovation to support economic development in the region. The organization was founded as the Stanford Research Institute. SRI formally separated from Stanford University in 1970 and became known as SRI International in 1977. SRI performs client-sponsored research and development for government agencies, commercial businesses, and private foundations. It also licenses its technologies, forms strategic partnerships, sells products, and creates spin-off companies. SRI's headquarters are located near the Stanford University campus. SRI's annual revenue in 2014 was approximately $540 million, which tripled from 1998 under the leadership of Curtis Carlson. In 1998, the organization was on the verge of bankruptcy when Carlson took over as CEO. Over the next sixteen years wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ionosphere
The ionosphere () is the ionized part of the upper atmosphere of Earth, from about to above sea level, a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar radiation. It plays an important role in atmospheric electricity and forms the inner edge of the magnetosphere. It has practical importance because, among other functions, it influences radio propagation to distant places on Earth. History of discovery As early as 1839, the German mathematician and physicist Carl Friedrich Gauss postulated that an electrically conducting region of the atmosphere could account for observed variations of Earth's magnetic field. Sixty years later, Guglielmo Marconi received the first trans-Atlantic radio signal on December 12, 1901, in St. John's, Newfoundland (now in Canada) using a kite-supported antenna for reception. The transmitting station in Poldhu, Cornwall, used a spark-gap transmitter to produce a signal with a freq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Over-the-horizon Radar
Over-the-horizon radar (OTH), sometimes called beyond the horizon radar (BTH), is a type of radar system with the ability to detect targets at very long ranges, typically hundreds to thousands of kilometres, beyond the radar horizon, which is the distance limit for ordinary radar. Several OTH radar systems were deployed starting in the 1950s and 1960s as part of early warning radar systems, but these have generally been replaced by airborne early warning systems. OTH radars have recently been making a comeback, as the need for accurate long-range tracking becomes less important with the ending of the Cold War, and less-expensive ground-based radars are once again being considered for roles such as maritime reconnaissance and drug enforcement. Technology The frequency of radio waves used by most radars, in the form of microwaves, travel in straight lines. This generally limits the detection range of radar systems to objects on their horizon (generally referred to as "line of sig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocket
A rocket (from it, rocchetto, , bobbin/spool) is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely from propellant carried within the vehicle; therefore a rocket can fly in the vacuum of space. Rockets work more efficiently in a vacuum and incur a loss of thrust due to the opposing pressure of the atmosphere. Multistage rockets are capable of attaining escape velocity from Earth and therefore can achieve unlimited maximum altitude. Compared with airbreathing engines, rockets are lightweight and powerful and capable of generating large accelerations. To control their flight, rockets rely on momentum, airfoils, auxiliary reaction engines, gimballed thrust, momentum wheels, deflection of the exhaust stream, propellant flow, spin, or gravity. Rockets for military and recreational uses date back to at least 13th-century China. Signific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Explosion
A nuclear explosion is an explosion that occurs as a result of the rapid release of energy from a high-speed nuclear reaction. The driving reaction may be nuclear fission or nuclear fusion or a multi-stage cascading combination of the two, though to date all fusion-based weapons have used a fission device to initiate fusion, and a pure fusion weapon remains a hypothetical device. Nuclear explosions are used in nuclear weapons and nuclear testing. Atmospheric nuclear explosions are associated with mushroom clouds, although mushroom clouds can occur with large chemical explosions. It is possible to have an air-burst nuclear explosion without those clouds. Nuclear explosions produce radiation and radioactive debris that is harmful to humans and can cause moderate to severe skin burns, eye damage, radiation sickness, radiation-induced cancer and possible death depending on how far from the blast radius a person is. Nuclear explosions can also have detrimental effects on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteor
A meteoroid () is a small rocky or metallic body in outer space. Meteoroids are defined as objects significantly smaller than asteroids, ranging in size from grains to objects up to a meter wide. Objects smaller than this are classified as micrometeoroids or space dust. Most are fragments from comets or asteroids, whereas others are collision impact debris ejected from bodies such as the Moon or Mars. When a meteoroid, comet, or asteroid enters Earth's atmosphere at a speed typically in excess of , aerodynamic heating of that object produces a streak of light, both from the glowing object and the trail of glowing particles that it leaves in its wake. This phenomenon is called a meteor or "shooting star". Meteors typically become visible when they are about 100 km above sea level. A series of many meteors appearing seconds or minutes apart and appearing to originate from the same fixed point in the sky is called a meteor shower. A meteorite is the remains of a meteoroid th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar
Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving information about the objects' locations and speeds. Radar was developed secretly for military use by several countries in the period before and during World War II. A key development was the cavity magnetron in the United Kingdom, which allowed the creation of relatively small systems with sub-meter resolution. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kung Chie Yeh or 孔; Kung is a transliteration of this common Chinese an ...
Kung or Küng may refer to: * ǃKung people * ǃKung language * Kung (Haida village), an historical village of the Haida people of the Queen Charlotte Islands of British Columbia, Canada; also Kung Indian Reserve No. 11 at the same location * Kung, alternate name of Kong, Iran, city on the Persian Gulf * Kung ( 宮), first note in the Chinese pentatonic scale or ''do'' * "Kung", a song by the rock band Phish * Kung (comics), a supervillain from DC Comics * Kung, Sila Lat, Sila Lat District, Sisaket Province, Thailand * KUNG, a vehicle module * Küng Blockflöten GmbH, Swiss recorder maker Surnames * Küng (also Kueng), people with the surname * Kong (surname) Kong (孔) is a Chinese and Korean surname. It can also be written as Kung in Taiwan, Hung in Hong Kong, Khổng in Vietnam, and Gong in Korea. There are around 2.1 million people with this surname in China in 2002, representing 0.23% of the popula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mac Van Valkenburg
Mac Elwyn Van Valkenburg (October 5, 1921–March 19, 1997) was an American electrical engineer and university professor. He wrote seven textbooks and numerous scientific publications. Early life and education Van Valkenburg was born in Union, Utah. He graduated from the University of Utah in 1943 with a Bachelor's degree in electrical engineering, received a master's degree in electrical engineering from the Massachusetts Institute of Technology in 1946, and a PhD in electrical engineering from Stanford University in 1952, under advisor Oswald Garrison Villard, Jr. Career Van Valkenburg was a professor at the University of Illinois from 1955 to 1966, then joined Princeton University as professor and head of electrical engineering until 1974, when he returned to UIUC. He received an endowed position, the W. W. Grainger Professorship, in 1982, and became Dean of the College of Engineering in 1984. Van Valkenburg was author of seven textbooks and numerous scientific publications. He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
