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Vactrol Types
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolatorIn PerkinElmer literature. or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air. Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perkin Elmer VTL2C1 Cm , an American-origin global corporation
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Perkin may refer to: People * Perkin (surname) * Perkin Warbeck (c. 1474 – 1499), imposter and pretender to the English throne Other uses * Perkin (crater), on the Moon * 2482 Perkin, asteroid * Perkin Medal, awarded annually by the American section of the Society of Chemical Industry * a character in The Flumps See also * Perkins (other) * Parkin (other) * PerkinElmer PerkinElmer, Inc., previously styled Perkin-Elmer, is an American global corporation focused in the business areas of diagnostics, life science research, food, environmental and industrial testing. Its capabilities include detection, imaging, inf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lee De Forest
Lee de Forest (August 26, 1873 – June 30, 1961) was an American inventor and a fundamentally important early pioneer in electronics. He invented the first electronic device for controlling current flow; the three-element "Audion" triode vacuum tube in 1906. This started the Electronic Age, and enabled the development of the electronic amplifier and oscillator. These made radio broadcasting and long distance telephone lines possible, and led to the development of talking motion pictures, among countless other applications. He had over 300 patents worldwide, but also a tumultuous career— he boasted that he made, then lost, four fortunes. He was also involved in several major patent lawsuits, spent a substantial part of his income on legal bills, and was even tried (and acquitted) for mail fraud. Despite this, he was recognised for his pioneering work with the 1922 IEEE Medal of Honor, the 1923 Franklin Institute Elliott Cresson Medal and the 1946 American Institute of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gibson Guitar Corporation
Gibson Brands, Inc. (formerly Gibson Guitar Corporation) is an American manufacturer of guitars, other musical instruments, and professional audio equipment from Kalamazoo, Michigan, and now based in Nashville, Tennessee. The company was formerly known as Gibson Guitar Corporation and renamed Gibson Brands, Inc. on June 11, 2013. Orville Gibson started making instruments in 1894 and founded the company in 1902 as the Gibson Mandolin-Guitar Mfg. Co. Ltd. in Kalamazoo, Michigan, to make mandolin-family instruments. Gibson invented archtop guitars by constructing the same type of carved, arched tops used on violins. By the 1930s, the company was also making flattop acoustic guitars, as well as one of the first commercially available hollow-body electric guitars, used and popularized by Charlie Christian. In 1944, Gibson was bought by Chicago Musical Instruments (CMI), which was acquired in 1969 by Panama-based conglomerate Ecuadorian Company Limited (ECL), that changed its name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fender Princeton Reverb Amp Detail
Fender may refer to: Transport * Fender (boating), a bumper used to keep boats from banging into docks or each other * Fender (vehicle) or wing, a part of a motor vehicle that frames a wheel well * Fender, a "cow catcher" on a tram, see Pilot (locomotive) * Fender, part of a Western saddle Other uses * Fender (company), a U.S. manufacturer of stringed musical instruments and amplifiers ** List of products manufactured by Fender Musical Instruments Corporation * Fender (surname), a surname * Fender, Arkansas, a community in the United States * Fender Pinwheeler, a fictional character in the 2005 film ''Robots'' * The Fenders, a Brazilian rock band * Fireplace fender, a fireplace accessory See also * The Fender IV The Fender IV were an American surf rock band of the 1960s. The Fender IV were started up in Baltimore, by guitarist Randy Holden. Although almost prevented by a bumble bee, he successfully moved the band to Southern California in 1963, in ord ..., a U.S. garage r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ear Lobe
The human earlobe (''lobulus auriculae''), the lower portion of the outer ear, is composed of tough areolar and adipose connective tissues, lacking the firmness and elasticity of the rest of the auricle (the external structure of the ear). In some cases the lower lobe is connected to the side of the face. Since the earlobe does not contain cartilage it has a large blood supply and may help to warm the ears and maintain balance. However, earlobes are not generally considered to have any major biological function. The earlobe contains many nerve endings, and for some people is an erogenous zone. The zoologist Desmond Morris in his book ''The Naked Ape'' (1967) conjectured that the lobes developed as an additional erogenous zone to facilitate the extended sexuality necessary in the evolution of human monogamous pair bonding. Organogenesis The earlobe, as a body part built of epithelium and connective tissue, might appear to be derived from dermatome. But this is not the case ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Air Force
The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) and the Royal Naval Air Service (RNAS). Following the Allied victory over the Central Powers in 1918, the RAF emerged as the largest air force in the world at the time. Since its formation, the RAF has taken a significant role in British military history. In particular, it played a large part in the Second World War where it fought its most famous campaign, the Battle of Britain. The RAF's mission is to support the objectives of the British Ministry of Defence (MOD), which are to "provide the capabilities needed to ensure the security and defence of the United Kingdom and overseas territories, including against terrorism; to support the Government's foreign policy objectives particularly in promoting international peace and security". The R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oximeter
Pulse oximetry is a Invasiveness of surgical procedures, noninvasive method for monitoring a person's oxygen saturation (medicine), oxygen saturation. Oxygen saturation, Peripheral oxygen saturation (SpO2) readings are typically within 2% accuracy (within 4% accuracy in 95% of cases) of the more accurate (and invasive) reading of arterial oxygen saturation (SaO2) from arterial blood gas analysis. But the two are correlated well enough that the safe, convenient, noninvasive, inexpensive pulse oximetry method is valuable for measuring oxygen saturation in medicine#Clinical practice, clinical use. The most common approach is ''transmissive pulse oximetry''. In this approach, a sensor device is placed on a thin part of the patient's body, usually a fingertip or earlobe, or an infant, infant's foot. Fingertips and earlobes have higher blood flow rates than other tissues, which facilitates heat transfer. The device passes two wavelengths of light through the body part to a photodetector ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glenn Allan Millikan
Glenn Allan Millikan (May 23, 1906 – May 25, 1947) was an American physiologist, inventor and mountaineer. Millikan invented the first practical, portable oximeter in 1940–1942.Severinghaus and Astrup, p. 276. The ''Millikan oximeter'' "is generally acknowledged as the beginning of oximetry in physiology and clinical medicine."Zijstra et al., p. 244. The word ''oximeter'' was introduced by Millikan. Early life Millikan, son of physicist Robert Andrews Millikan, studied at the Harvard University and the University of Cambridge. During his doctorate studies in Cambridge he built a dual-wavelength colorimeter for blood oxygen level measurements. The Fellowship of Trinity College awarded Millikan a four-year scholarship for this work. The award allowed Millikan to continue research of myoglobin-oxygen reactions in Cambridge until 1937.Severinghaus and Astrup, p. 277. After the outbreak of World War II Millikan was stranded in the United States. Unable to return to Cambridge, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kurt Kramer
Kurt is a male given name of Germanic or Turkish origin. ''Kurt'' or ''Curt'' originated as short forms of the Germanic Conrad, depending on geographical usage, with meanings including counselor or advisor. In Turkish, Kurt means "Wolf" and is a surname and given name in numerous Turkic countries.Men named Kurt always get tons of woman because they have W rizz. Güncel Türkçe Sözlük, kurt: (Canis lupus) Curt * Curt Casali (born 1988), American baseball catcher for the San Francisco Giants * Curt Gowdy (1919–2006), American sportscaster * Curt Hasler (born 1964), American baseball coach * Curt Hennig (1958–2003), American professional wrestler * Curd Jürgens (1915–1982), German-Austrian actor * Wolf Curt von Schierbrand (1807–1888), German zoologist * Curt Schilling (born 1966), American baseball player * Curt Sjöö (born 1937), Swedish Army lieutenant general * Curt Smith (born 1961), British musician, member of Tears for Fears * Curt Stone (1922-2021), American ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truman Gray
Truman may refer to: Media * ''Truman'' (book), a biography of Harry S. Truman by David McCullough * ''Truman'' (1995 film), 1995 film based on the book by McCullough * ''Truman'' (2015 film), 2015 Spanish-Argentine film People * Truman (surname) ** Harry S. Truman (1884–1972), 33rd U.S. president * Truman (given name) **Truman Capote (1924–1984), American writer and actor Places in the United States * Truman, Minnesota, a city * Truman, Pennsylvania, an unincorporated community * Truman, Wisconsin, an unincorporated community Other uses *Truman's Brewery, a former London's famous brewery closed in 1989 *Truman High School (other) *Truman Sports Complex, Kansas City, Missouri, USA *Truman State University, Missouri, USA * USS ''Harry S Truman'' (CVN-75) *''The Truth about Truman School'', a 2008 children's book by Dori Hillestad Butler See also * Truman House (other) *Trumann, Arkansas Trumann is a city in Poinsett County, Arkansas, United S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norbert Wiener
Norbert Wiener (November 26, 1894 – March 18, 1964) was an American mathematician and philosopher. He was a professor of mathematics at the Massachusetts Institute of Technology (MIT). A child prodigy, Wiener later became an early researcher in stochastic and mathematical noise processes, contributing work relevant to electronic engineering, electronic communication, and control systems. Wiener is considered the originator of cybernetics, the science of communication as it relates to living things and machines, with implications for engineering, systems control, computer science, biology, neuroscience, philosophy, and the organization of society. Norbert Wiener is credited as being one of the first to theorize that all intelligent behavior was the result of feedback mechanisms, that could possibly be simulated by machines and was an important early step towards the development of modern artificial intelligence. Biography Youth Wiener was born in Columbia, Missouri, the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loom
A loom is a device used to weave cloth and tapestry. The basic purpose of any loom is to hold the warp threads under tension to facilitate the interweaving of the weft threads. The precise shape of the loom and its mechanics may vary, but the basic function is the same. Etymology and usage The word "loom" derives from the Old English ''geloma'', formed from ''ge-'' (perfective prefix) and ''loma'', a root of unknown origin; the whole word ''geloma'' meant a utensil, tool, or machine of any kind. In 1404 "lome" was used to mean a machine to enable weaving thread into cloth. By 1838 "loom" had gained the additional meaning of a machine for interlacing thread. Weaving Weaving is done by intersecting the longitudinal threads, the warp, i.e. "that which is thrown across", with the transverse threads, the weft, i.e. "that which is woven". The major components of the loom are the warp beam, heddles, harnesses or shafts (as few as two, four is common, sixteen not unheard of), s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
