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Eureka Beacon
The Rebecca/Eureka transponding radar was a short-range radio navigation system used for the dropping of airborne forces and their supplies. It consisted of two parts, the Rebecca airborne transceiver and antenna system, and the Eureka ground-based transponder. Rebecca calculated the range to the Eureka based on the timing of the return signals, and its relative position using a highly directional antenna. The 'Rebecca' name comes from the phrase " Recognition of beacons". The 'Eureka' name comes from the Greek word meaning " I have found it!". The system was developed in the UK at the Telecommunications Research Establishment by Robert Hanbury Brown and John William Sutton Pringle. Rebecca was essentially an ASV radar fit to a new broadcaster unit, while the Eureka system was all-new. Initial production began in 1943, and the system was used for dropping supplies to resistance fighters in occupied Europe, after delivery of the portable Eureka unit. The US Army Air Force started pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMES
Ames may refer to: Places United States * Ames, Arkansas, a place in Arkansas * Ames, Colorado * Ames, Illinois * Ames, Indiana * Ames, Iowa, the most populous city bearing this name * Ames, Kansas * Ames, Nebraska * Ames, New York * Ames, Oklahoma * Ames, Texas * Ames, West Virginia Europe * Ames, Pas-de-Calais, France * Ames, Spain Acronyms * Air Ministry Experimental Station, used in radar designations * AMES (school), Academy for Math, Engineering, and Science, in Salt Lake City, Utah * Apparent mineralocorticoid excess syndrome Other uses * Ames (automobile), an American brand * Ames Department Stores Inc., a defunct department store chain based in Connecticut * Ames (surname) * Ames family, the family associated with Ames True Temper * Ames Manufacturing Company * Ames Range, a mountain range in Antarctica * Ames Research Center, NASA research center in California's Silicon Valley * Ames True Temper, a manufacturing company which produces non-powered lawn and garden pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground Attack
In military tactics, close air support (CAS) is defined as air action such as air strikes by fixed or rotary-winged aircraft against hostile targets near friendly forces and require detailed integration of each air mission with fire and movement of these forces and attacks with aerial bombs, glide bombs, missiles, rockets, autocannons, machine guns, and even directed-energy weapons such as lasers.''Close Air Support''. United States Department of Defense, 2014. The requirement for detailed integration because of proximity, fires or movement is the determining factor. CAS may need to be conducted during shaping operations with Special Operations Forces (SOF) if the mission requires detailed integration with the fire and movement of those forces. A closely related subset of air interdiction (AI), battlefield air interdiction, denotes interdiction against units with near-term effects on friendly units, but which does not require integration with friendly troop movements. The term "b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
School Of Army Co-operation
The School of Land/Air Warfare was a Royal Air Force school based at Old Sarum in Wiltshire. Its purpose was to encourage greater co-operation between officers in the air and those on the ground. History The School was originally established at Old Sarum in 1920 as the School of Army Co-operation to provide training for air officers supporting troops on the ground. This became the School of Air Support in 1945 when its remit was broadened to cover assistance by air in amphibious operations. It was reformed again in May 1947, within No. 11 Group, as the School of Land/Air Warfare. In March 1963 it merged with the Amphibious Warfare School Marine Corps University is a professional military education university system of the United States Marine Corps. It is accredited by the Commission on Colleges of the Southern Association of Colleges and Schools to award Master's Degrees. H ... (formerly based at Poole) to form the Joint Warfare Establishment. References {{DEFAUL ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAF Army Cooperation Command
The RAF Army Co-operation Command was a short-lived command of the Royal Air Force during the Second World War, comprising the army cooperation units of the RAF. The command was formed on 1 December 1940 when No. 22 (Army Co-Operation) Group, previously a part of Fighter Command, was raised to command status. Initially it controlled two groups: No. 70 Group RAF for training and No. 71 Group RAF for operations. In August 1941, 71 Group re-organized its squadrons into a Wing basis. Each wing was directly attached to a UK based Army regional Command. Its function was to act as the focus for activities connected with the interaction of the British Army and the RAF, such as close air support, tactical reconnaissance, artillery spotting and training of anti-aircraft defences. It was also responsible for developing tactics for the invasion of Europe, where direct air support proved to be decisive.Delve 1994, p. 100. Army Co-Operation Command proved to be controversial, with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old Sarum Airfield
Old Sarum Airfield is a grass strip airfield north-north-east of Salisbury, Wiltshire, England. The adjacent areas are a mix of vacant land, residential and industrial sites. Residential areas are to the south and east, occupying the old airfield married quarters and officers' mess, now known as Throgmorton Hall. Industrial/business units occupy a number of the World War I and World War II airfield buildings, as well as several large modern warehouses, office blocks and car showrooms, the development of which is continuing to the present day. Old Sarum is a well-preserved flying field of the World War I period, bounded by one of the most complete suites of technical and hangar buildings of the period. The site has three Grade II* listed hangars and a Grade II listed former workshop, all built in 1918, as well as a Grade II listed Territorial Army Headquarters (the 1935 Station Headquarters). The airfield was designated as a conservation area by Salisbury District Council in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge University
, mottoeng = Literal: From here, light and sacred draughts. Non literal: From this place, we gain enlightenment and precious knowledge. , established = , other_name = The Chancellor, Masters and Scholars of the University of Cambridge , type = Public research university , endowment = £7.121 billion (including colleges) , budget = £2.308 billion (excluding colleges) , chancellor = The Lord Sainsbury of Turville , vice_chancellor = Anthony Freeling , students = 24,450 (2020) , undergrad = 12,850 (2020) , postgrad = 11,600 (2020) , city = Cambridge , country = England , campus_type = , sporting_affiliations = The Sporting Blue , colours = Cambridge Blue , website = , logo = University of Cambridge logo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cavity Magnetron
The cavity magnetron is a high-power vacuum tube used in early radar systems and currently in microwave ovens and linear particle accelerators. It generates microwaves using the interaction of a stream of electrons with a magnetic field while moving past a series of cavity resonators, which are small, open cavities in a metal block. Electrons pass by the cavities and cause microwaves to oscillate within, similar to the functioning of a whistle producing a tone when excited by an air stream blown past its opening. The resonant frequency of the arrangement is determined by the cavities' physical dimensions. Unlike other vacuum tubes, such as a klystron or a traveling-wave tube (TWT), the magnetron cannot function as an amplifier for increasing the intensity of an applied microwave signal; the magnetron serves solely as an oscillator, generating a microwave signal from direct current electricity supplied to the vacuum tube. The use of magnetic fields as a means to control the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microwave
Microwave is a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter corresponding to frequencies between 300 MHz and 300 GHz respectively. Different sources define different frequency ranges as microwaves; the above broad definition includes both UHF and EHF (millimeter wave) bands. A more common definition in radio-frequency engineering is the range between 1 and 100 GHz (wavelengths between 0.3 m and 3 mm). In all cases, microwaves include the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum. Frequencies in the microwave range are often referred to by their IEEE radar band designations: S, C, X, Ku, K, or Ka band, or by similar NATO or EU designations. The prefix ' in ''microwave'' is not meant to suggest a wavelength in the micrometer range. Rather, it indicates that microwaves are "small" (having shorter wavelengths), compared to the radio waves used prior to microwave te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Worth Matravers
Worth Matravers () is a village and civil parishes in England, civil parish in the England, English county of Dorset. The village is situated on the cliffs west of Swanage. It comprises limestone cottages and farm houses and is built around a pond, which is a regular feature on postcards of the Isle of Purbeck. The civil parish stretches from the coast northwards to, and just beyond, the A351 road (Great Britain), A351 road from Corfe Castle (village), Corfe Castle to Swanage. The village of Worth Matravers is situated on side roads towards the south of the parish, which also includes the village of Harman's Cross on the main road to the north. The cliffs of Worth Matravers were the site of a Chain Home radar station during World War II, which was instrumental in the development of radar when the Telecommunications Research Establishment outstation shared the site from 1940 until 1942 when it was relocated to Malvern, Worcestershire. Geography To the south of Worth Matravers vil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brighton
Brighton () is a seaside resort and one of the two main areas of the City of Brighton and Hove in the county of East Sussex, England. It is located south of London. Archaeological evidence of settlement in the area dates back to the Bronze Age, Roman and Anglo-Saxon periods. The ancient settlement of "Brighthelmstone" was documented in the ''Domesday Book'' (1086). The town's importance grew in the Middle Ages as the Old Town developed, but it languished in the early modern period, affected by foreign attacks, storms, a suffering economy and a declining population. Brighton began to attract more visitors following improved road transport to London and becoming a boarding point for boats travelling to France. The town also developed in popularity as a health resort for sea bathing as a purported cure for illnesses. In the Georgian era, Brighton developed as a highly fashionable seaside resort, encouraged by the patronage of the Prince Regent, later King George IV, who spent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mastoidectomy
A mastoidectomy is a procedure performed to remove the mastoid air cells, air bubbles in the skull, near the inner ears. This can be done as part of treatment for mastoiditis, chronic suppurative otitis media or cholesteatoma. In addition, it is sometimes performed as part of other procedures (cochlear implant) or for access to the middle ear. There are classically 5 different types of mastoidectomy: ;* Radical : Removal of posterior and superior canal wall, meatoplasty and exteriorisation of middle ear. ;* Canal wall down : Removal of posterior and superior canal wall, meatoplasty. Tympanic membrane left in place. ;* Canal wall up : Posterior and superior canal wall are kept intact. A facial recess approach is taken. ;* Cortical : (Also known as schwartze procedure) - Removal of Mastoid air cells is undertaken without affecting the middle ear. This is typically done for mastoiditis Mastoiditis is the result of an infection that extends to the air cells of the skull behind the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
