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C. E. Wynn-Williams
Charles Eryl Wynn-Williams (5 March 1903 – 30 August 1979), was a Welsh physicist, noted for his research on electronic instrumentation for use in nuclear physics. His work on the scale-of-two counter contributed to the development of the modern computer. Early life and studies Wynn-Williams was born at 'Glasfryn' in Swansea, Glamorganshire, Wales, on 5 March 1903. He was the eldest child of William Williams (1863–1945), a physics teacher and later divisional inspector of schools for north and mid-Wales, and Mary Ellen Wynn (1907–1935), known as Nell, daughter of Robert Wynn, a shopkeeper in Llanrwst. His education was at Grove Park School in Wrexham, and, from 1920, at Bangor University, where he graduated in 1923. He stayed at this university to undertake research work on electrical instrumentation, and gained the degree of MSc from the University of Wales in 1924. He was known as C. E. Wynn-Williams from his time at University onwards. Wynn-Williams was Liberal in poli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swansea
Swansea (; cy, Abertawe ) is a coastal city and the second-largest city of Wales. It forms a principal area, officially known as the City and County of Swansea ( cy, links=no, Dinas a Sir Abertawe). The city is the twenty-fifth largest in the United Kingdom. Located along Swansea Bay in southwest Wales, with the principal area covering the Gower Peninsula, it is part of the Swansea Bay region and part of the historic county of Glamorgan; also the ancient Welsh commote of Gŵyr. The principal area is the second most populous local authority area in Wales with an estimated population of 246,563 in 2020. Swansea, along with Neath and Port Talbot, forms the Swansea Urban Area with a population of 300,352 in 2011. It is also part of the Swansea Bay City Region. During the 19th-century industrial heyday, Swansea was the key centre of the copper-smelting industry, earning the nickname ''Copperopolis''. Etymologies The Welsh name, ''Abertawe'', translates as ''"mouth/es ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Wales
The University of Wales (Welsh language, Welsh: ''Prifysgol Cymru'') is a confederal university based in Cardiff, Wales. Founded by royal charter in 1893 as a federal university with three constituent colleges – Aberystwyth, Bangor and Cardiff – the university was the first university established in Wales, one of the four countries in the United Kingdom. The university was, prior to the break up of the federation, the second largest university in the UK. A federal university similar to the University of London, the University of Wales was in charge of examining students, while its colleges were in charge of teaching. Historically, the University of Wales was the only university in Wales until the establishment of the University of Glamorgan in 1992. Former colleges under the University of Wales included most of the now independent universities in Wales: Aberystwyth University (formerly University of Wales, Aberystwyth), Bangor University (formerly University of Wales, Bangor), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Paget Thomson
Sir George Paget Thomson, FRS (; 3 May 189210 September 1975) was a British physicist and Nobel laureate in physics recognized for his discovery of the wave properties of the electron by electron diffraction. Education and early life Thomson was born in Cambridge, England, the son of physicist and Nobel laureate J. J. Thomson and Rose Elisabeth Paget, daughter of George Edward Paget. Thomson went to The Perse School, Cambridge before going on to read mathematics and physics at Trinity College, Cambridge, until the outbreak of World War I in 1914, when he was commissioned into the Queen's Royal West Surrey Regiment. After brief service in France, he transferred to the Royal Flying Corps in 1915 doing research on aerodynamics at the Royal Aircraft Establishment at Farnborough and elsewhere. He resigned his commission as a captain in 1920. Career After briefly serving in the First World War Thomson became a Fellow at Cambridge and then moved to the University of Aberdeen. Georg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neutron
The neutron is a subatomic particle, symbol or , which has a neutral (not positive or negative) charge, and a mass slightly greater than that of a proton. Protons and neutrons constitute the nuclei of atoms. Since protons and neutrons behave similarly within the nucleus, and each has a mass of approximately one atomic mass unit, they are both referred to as nucleons. Their properties and interactions are described by nuclear physics. Protons and neutrons are not elementary particles; each is composed of three quarks. The chemical properties of an atom are mostly determined by the configuration of electrons that orbit the atom's heavy nucleus. The electron configuration is determined by the charge of the nucleus, which is determined by the number of protons, or atomic number. The number of neutrons is the neutron number. Neutrons do not affect the electron configuration, but the sum of atomic and neutron numbers is the mass of the nucleus. Atoms of a chemical element t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Chadwick
Sir James Chadwick, (20 October 1891 – 24 July 1974) was an English physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932. In 1941, he wrote the final draft of the MAUD Report, which inspired the U.S. government to begin serious atom bomb research efforts. He was the head of the British team that worked on the Manhattan Project during World War II. He was knighted in Britain in 1945 for his achievements in physics. Chadwick graduated from the Victoria University of Manchester in 1911, where he studied under Ernest Rutherford (known as the "father of nuclear physics"). At Manchester, he continued to study under Rutherford until he was awarded his MSc in 1913. The same year, Chadwick was awarded an 1851 Research Fellowship from the Royal Commission for the Exhibition of 1851. He elected to study beta radiation under Hans Geiger in Berlin. Using Geiger's recently developed Geiger counter, Chadwick was able to demonstrate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thyratron
A thyratron is a type of gas-filled tube used as a high-power electrical switch and controlled rectifier. Thyratrons can handle much greater currents than similar hard-vacuum tubes. Electron multiplication occurs when the gas becomes ionized, producing a phenomenon known as Townsend discharge. Gases used include mercury vapor, xenon, neon, and (in special high-voltage applications or applications requiring very short switching times) hydrogen. Unlike a vacuum tube (valve), a thyratron cannot be used to amplify signals linearly. In the 1920s, thyratrons were derived from early vacuum tubes such as the UV-200, which contained a small amount of argon gas to increase its sensitivity as a radio signal detector, and the German LRS relay tube, which also contained argon gas. Gas rectifiers, which predated vacuum tubes, such as the argon-filled General Electric " Tungar bulb" and the Cooper-Hewitt mercury-pool rectifier, also provided an influence. Irving Langmuir and G. S. Meikle of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Counter
Mechanical counters are digital counters built using mechanical components. Long before electronics became common, mechanical devices were used to count events. They typically consist of a series of disks mounted on an axle, with the digits zero through nine marked on their edge. The right most disk moves one increment with each event. Each disk except the left-most has a protrusion that, after the completion of one revolution, moves the next disk to the left one increment. Such counters were used as odometers for bicycles and cars and in tape recorders and fuel dispensers and to control manufacturing processes. One of the largest manufacturers was the Veeder-Root company, and their name was often used for this type of counter.. Mechanical counters can be made into electromechanical counters, that count electrical impulses, by adding a small solenoid. History An odometer for measuring distance was first described by Vitruvius around 27 and 23 BC, although the actual inventor may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prescaler
A prescaler is an electronic counting circuit used to reduce a high frequency electrical signal to a lower frequency by integer division. The prescaler takes the basic timer clock frequency (which may be the CPU clock frequency or may be some higher or lower frequency) and divides it by some value before feeding it to the timer, according to how the prescaler register(s) are configured. The prescaler values, referred to as prescales, that may be configured might be limited to a few fixed values (powers of 2), or they may be any integer value from 1 to 2^P, where P is the number of prescaler bits. The purpose of the prescaler is to allow the timer to be clocked at the rate a user desires. For shorter (8 and 16-bit) timers, there will often be a tradeoff between resolution (high resolution requires a high clock rate) and range (high clock rates cause the timer to overflow more quickly). For example, one cannot (without some tricks) achieve 1 µs resolution and a 1 sec maxim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armamentarium
Armamentarium may refer to *Medical equipment *the Latin term for an arsenal An arsenal is a place where arms and ammunition are made, maintained and repaired, stored, or issued, in any combination, whether privately or publicly owned. Arsenal and armoury (British English) or armory (American English) are mostly ... * ''Armamentarium'' (album), 2007 album by German melodic death metal band Neaera {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wynn-Williams Scale-of -Two Counter From The Cavendish Laboratory, University Of Cambridge,UK
Wynn-Williams is a surname. It may refer to: * C. E. Wynn-Williams (1903–1979), Welsh-born physicist * Henry Wynn-Williams William Henry Wynn-Williams (1828 – 27 October 1913) was a 19th-century Member of Parliament from Canterbury, New Zealand. He was a prominent lawyer in Christchurch. Early life Wynn-Williams was born in August 1828 in Llangar, Conwy County Bo ... (1828–1913), 19th-century Member of Parliament and prominent lawyer in Christchurch :* Wynn Williams & Co, a law firm in Christchurch named after the above See also * Williams-Wynn {{surname Compound surnames Surnames of Welsh origin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpha Particle
Alpha particles, also called alpha rays or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a helium-4 nucleus. They are generally produced in the process of alpha decay, but may also be produced in other ways. Alpha particles are named after the first letter in the Greek alphabet, α. The symbol for the alpha particle is α or α2+. Because they are identical to helium nuclei, they are also sometimes written as or indicating a helium ion with a +2 charge (missing its two electrons). Once the ion gains electrons from its environment, the alpha particle becomes a normal (electrically neutral) helium atom . Alpha particles have a net spin of zero. Due to the mechanism of their production in standard alpha radioactive decay, alpha particles generally have a kinetic energy of about 5 MeV, and a velocity in the vicinity of 4% of the speed of light. (See discussion below for the limits of these figures in alpha decay.) They are ... [...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] |
