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microwave ovens | A Wisdom Archive on microwave ovens | | microwave ovens A selection of articles related to microwave ovens | |
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microwave ovens
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| ARTICLES RELATED TO microwave ovens | | | |  microwave ovens: Encyclopedia II - Vacuum tube - ReliabilityThe chief reliability problem of a tube is that the filament or cathode is slowly "poisoned" by atoms from other elements in the tube, which damage its ability to emit electrons. Trapped gases or slow gas leaks can also damage the cathode or cause plate-current runaway due to ionization of free gas molecules. Vacuum hardness and proper selection of construction materials are the major influences on tube lifetime. (Tube cathodes do not "wear out" as lamp filaments do; th ...
See also:Vacuum tube, Vacuum tube - Operation, Vacuum tube - Development, Vacuum tube - Diodes and triodes, Vacuum tube - Tetrodes and pentodes, Vacuum tube - Other variations, Vacuum tube - Reliability, Vacuum tube - Applications, Vacuum tube - Other vacuum tube devices, Vacuum tube - Field emitter vacuum tubes, Vacuum tube - Vacuum tube solar heaters, Vacuum tube - Patents Read more here: » Vacuum tube: Encyclopedia II - Vacuum tube - Reliability |
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| | | | | microwave ovens: Encyclopedia II - Vacuum tube - Applications Tubes were ubiquitous in the early generations of electronic devices, such as radios, televisions, and early computers such as the Colossus which used 2000 tubes, the ENIAC which used nearly 18,000 tubes, and the IBM 700 series. Vacuum tubes inherently have higher resistance to the electromagnetic pulse effect of nuclear explosions. This property kept them in use for certain military applications long after transistors had replaced them elsewhere. Vacuum tubes are still used for very high-powered applications such as microwave ovens, industrial radio-frequency heatin ...
See also:Vacuum tube, Vacuum tube - Operation, Vacuum tube - Development, Vacuum tube - Diodes and triodes, Vacuum tube - Tetrodes and pentodes, Vacuum tube - Other variations, Vacuum tube - Reliability, Vacuum tube - Applications, Vacuum tube - Other vacuum tube devices, Vacuum tube - Field emitter vacuum tubes, Vacuum tube - Vacuum tube solar heaters, Vacuum tube - Patents Read more here: » Vacuum tube: Encyclopedia II - Vacuum tube - Applications |
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| | | | | microwave ovens: Encyclopedia II - 1970s - National issues
1970s - In the Middle East.
Political authoritarianism in Arab and Middle Eastern states, combined with the occupation of the West Bank by Israel, led to a major increase in terrorism. The Palestinian terror group Black September was involved in plane hijackings and a deadly hostage incident at the 1972 Summer Olympics in Munich, Germany.
In 1975, tensions between Maronite Christian and Muslim factions in Lebanon brought that country to civil war, which ...
See also:1970s, 1970s - Worldwide trends in the Seventies, 1970s - Economy of the Seventies, 1970s - Oil crisis, 1970s - Social movements, 1970s - Environmentalism, 1970s - Feminism, 1970s - Gay rights, 1970s - Culture during the Seventies, 1970s - Emerging social perspectives in the Seventies, 1970s - The Seventies in music, 1970s - The Seventies in cinema, 1970s - The Seventies in television, 1970s - The Seventies in literature, 1970s - The Seventies in architecture, 1970s - The Seventies in science and philosophy, 1970s - The Seventies in sports, 1970s - The Seventies in technology, 1970s - National issues, 1970s - In the Middle East, 1970s - In Africa, 1970s - In India and Pakistan, 1970s - In Southeast Asia, 1970s - In Japan, 1970s - In the Soviet Union and the Eastern Bloc, 1970s - In the United States, 1970s - In the United Kingdom Read more here: » 1970s: Encyclopedia II - 1970s - National issues |
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| | | | | microwave ovens: Encyclopedia II - Terraforming - Ethical issues Related article: Environmental ethics
There is a philosophical debate within biology and ecology as to whether terraforming other worlds is an ethical endeavor. On the pro-terraforming side of the argument, there are those like Robert Zubrin and Richard L. S. Taylor who say that it is humanity's moral obligation to make as much of the universe suitable for human life as possible; this argument is an example of homocentrism. Taylor's slogan, "Move ove ...
See also:Terraforming, Terraforming - History of scholarly study, Terraforming - Ethical issues, Terraforming - Theoretical methods of terraforming, Terraforming - Mars, Terraforming - Venus, Terraforming - Other worlds, Terraforming - Paraterraforming, Terraforming - In fiction, Terraforming - Prose, Terraforming - Television and film, Terraforming - Miscellanea Read more here: » Terraforming: Encyclopedia II - Terraforming - Ethical issues |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Geography The city of Birmingham is situated on an area of high ground, around 150-200 metres above sea level. The main north-south watershed of Britain actually passes through Birmingham. This high ground makes Birmingham prone to tornadoes which were witnessed in mid-2005
To the south west of the city lie the Clent Hills and Walton Hill, which reach 315 m and have good views over the city.
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See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Geography |
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| | | | | microwave ovens: Encyclopedia II - IEEE 802.11 - Security The IEEE set up a dedicated task group to create a replacement security solution, 802.11i (previously this work was handled as part of a broader 802.11e effort to enhance the MAC layer). The Wi-Fi Alliance announced an interim specification called Wi-Fi Protected Access (WPA) based on a subset of the then current IEEE 802.11i draft. These started to appear in products in mid-2003. 802.11i (aka WPA2) itself was ratified in June 2004, and uses the Advanced Encryption Standard, instead of RC4, which was used in WEP and WPA.
In January 2005, IEEE set up yet another task group TGw to protect management and broadcast frames, which previous ...
See also:IEEE 802.11, IEEE 802.11 - Protocols, IEEE 802.11 - 802.11 legacy, IEEE 802.11 - 802.11b, IEEE 802.11 - 802.11a, IEEE 802.11 - 802.11g, IEEE 802.11 - Non-Standard Channel Bonding, IEEE 802.11 - 802.11n, IEEE 802.11 - Certification, IEEE 802.11 - Standards, IEEE 802.11 - Community networks, IEEE 802.11 - Security Read more here: » IEEE 802.11: Encyclopedia II - IEEE 802.11 - Security |
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| | | | | microwave ovens: Encyclopedia II - IEEE 802.11 - Standards The following IEEE standards[3] and task groups exist within the IEEE 802.11 working group:
IEEE 802.11 - The original 1 Mbit/s and 2 Mbit/s, 2.4 GHz RF and IR standard (1999)
IEEE 802.11a - 54 Mbit/s, 5 GHz standard (1999, shipping products in 2001)
IEEE 802.11b - Enhancements to 802.11 to support 5.5 and 11 Mbit/s (1999)
IEEE 802.11c - Bridge operation procedures; included in the IEEE 802.1D standard (2001)
IEEE 802.11d - International (country-to-country) roaming extensions (2001)
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See also:IEEE 802.11, IEEE 802.11 - Protocols, IEEE 802.11 - 802.11 legacy, IEEE 802.11 - 802.11b, IEEE 802.11 - 802.11a, IEEE 802.11 - 802.11g, IEEE 802.11 - Non-Standard Channel Bonding, IEEE 802.11 - 802.11n, IEEE 802.11 - Certification, IEEE 802.11 - Standards, IEEE 802.11 - Community networks, IEEE 802.11 - Security Read more here: » IEEE 802.11: Encyclopedia II - IEEE 802.11 - Standards |
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| | | | | microwave ovens: Encyclopedia II - Sir John Randall - Later Years In 1970 he retired to Edinburgh University, where he formed a group which applied a range of new biophysical methods to study various biological problems. He continued that work with characteristic vigour until his death.
In science Randall was not only original but even maverick. He made extremely important contributions to biological science when he set up, at the right time, a large multidisciplinary biophysical laboratory where his staff were able to achieve much success. His contributions as an individual worker in biophysics wer ...
See also:Sir John Randall, Sir John Randall - Origins, Sir John Randall - The Magnetron, Sir John Randall - King's College London, Sir John Randall - Later Years, Sir John Randall - Honours, Sir John Randall - Maurice Wilkins wrote this about Randall for the Royal Society on his death:, Sir John Randall - Books featuring Sir John Randall Read more here: » Sir John Randall: Encyclopedia II - Sir John Randall - Later Years |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Economy Birmingham is an important manufacturing and engineering centre, employing over 100,000 people in industry and contributing billions of pounds to the national economy. Over a quarter of the UK's exports originate in the greater Birmingham area.
Birmingham's industrial heritage predates the Industrial Revolution, and up until the 20th Century the city maintained a tradition of individual craftsmen, sometimes working independently in their own back yards or on piecework rates in rented workshops, alongside larger factories. During the I ...
See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Economy |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Architecture Although Birmingham has existed as a settlement for over a thousand years, today's city is overwhelmingly a product of the 18th, 19th, and 20th centuries, as the real growth of the city began with the Industrial Revolution. Consequently, relatively few buildings survive from its earlier history.
Traces of medieval Birmingham can be seen in the oldest churches, notably the original parish church, St Martin's in the Bullring, where a church has stood since at least the 12th century. The current church (begun around 1290) was extensively ...
See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Architecture |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Transport Due in part to its central location in England, Birmingham is a major transport hub on the motorway, rail, and canal networks.
It is served by a number of major roads, including the M5, M6, M6 Toll, M40, and M42 motorways. Junction 6 of the M6 is also one of Birmingham's most famous landmarks, and probably the most famous motorway junction in the UK: Spaghetti Junction, officially called the Gravelly Hill Interchange.
Local public transport is by bus, local train and tram (the Midland Metro light railway system between the city ...
See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Transport |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Famous residents Neville Chamberlain, J. R. R. Tolkien, and Ozzy Osbourne are a few of the many famous names associated with Birmingham.
For a larger list see List of famous residents of Birmingham
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See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Famous residents |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Politics Birmingham City Council is the largest local authority in the UK with, following a reorganisation of boundaries in June 2004, 120 councillors representing just under one million people, in 40 wards.
After the election of 10 June 2004, there is no overall control, with the 120 seats being divided between the Labour, (53 councillors), Conservative (39) and Liberal Democrat ("Lib-Dem", 28) parties.
There is a Conservative/Lib-Dem coalition, with Conservative ...
See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Politics |
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| | | | | microwave ovens: Encyclopedia II - Sir John Randall - King's College London In 1946 he moved to the Wheatstone chair of physics at King's College London, where the Medical Research Council set up the Biophysics Research Unit with Randall as the director (now known as Randall Division of Cell and Molecular Biophysics) at King's College London. During his term as director the experimental work leading to the discovery of the structure of DNA was made there by Rosalind Franklin, Raymond Gosling, and Maurice Wilkins. Maurice Wilkins shared the 1962 Nobel Prize for Physiology and Medicine with James Watson and Francis Cric ...
See also:Sir John Randall, Sir John Randall - Origins, Sir John Randall - The Magnetron, Sir John Randall - King's College London, Sir John Randall - Later Years, Sir John Randall - Honours, Sir John Randall - Maurice Wilkins wrote this about Randall for the Royal Society on his death:, Sir John Randall - Books featuring Sir John Randall Read more here: » Sir John Randall: Encyclopedia II - Sir John Randall - King's College London |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Education Birmingham has three universities: the University of Birmingham, Aston University and the University of Central England (UCE). It also has two other higher education colleges (Newman College and the Birmingham College of Food, Tourism and Creative Studies). The Birmingham Conservatoire and Birmingham School of Acting, both now part of UCE, offer higher education in the arts.
The city council is England's largest local education authority, directly or indirectly responsible for 25 nursery schools, 328 primary schools, 77 secondary scho ...
See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Education |
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| | | | | microwave ovens: Encyclopedia II - Terraforming - Paraterraforming Also known as the "worldhouse" concept, paraterraforming involves the construction of a habitable enclosure on a planet which eventually grows to encompass most of the planet's usable area. The enclosure would consist of a transparent roof held one or more kilometers above the surface, pressurized with a breathable atmosphere, and anchored with tension towers and cables at regular intervals. Proponents claim worldhouses can be c ...
See also:Terraforming, Terraforming - History of scholarly study, Terraforming - Ethical issues, Terraforming - Theoretical methods of terraforming, Terraforming - Mars, Terraforming - Venus, Terraforming - Other worlds, Terraforming - Paraterraforming, Terraforming - In fiction, Terraforming - Prose, Terraforming - Television and film, Terraforming - Miscellanea Read more here: » Terraforming: Encyclopedia II - Terraforming - Paraterraforming |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Science and invention Local inventions and notable firsts include: gas lighting, roller skate wheels, the Baskerville Font, questionnaires, Custard powder, foam rubber, the magnetron (the core component in the development of radar and microwave ovens), the UK electroplating industry, the first ever use of radiography in an operation, and the UK's first ever hole-in-the-heart operation, at Birmingham Children's Hospital.
Among the city's notable scientists and inventors are:
Matthew Boulton, proprietor of the Soho engineering works.
Si ...
See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Science and invention |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Transport Due in part to its central location in England, Birmingham is a major transport hub on the motorway, rail, and canal networks.
It is served by a number of major roads, including the M5, M6, M6 Toll, M40, and M42 motorways.
Local public transport is by bus, local train and tram (the Midland Metro light railway system between the city centre and Wolverhampton). The number 11A and 11C outer circle bus routes are the longest urban bus routes in Europe. The city's main station, Birmingham New Street, is at the centre of the national ...
See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Transport |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Culture and arts
Birmingham - Popular music.
Although its music scene is not as renowned as those of Liverpool or Manchester, Birmingham has had a vibrant and varied musical history over the last half-century.
In the 1960s, the "Brum Beat" era featured blues and early progressive rock bands such as The Fortunes, Spencer Davis Group, Traffic, The Move and The Moody Blues.
The city is often described as the birthplace of heavy metal music, with Judas Priest and Black Sabbath coming from Birmingham. Robert Plant and John Bo ...
See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Culture and arts |
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| | | | | microwave ovens: Encyclopedia II - Terraforming - In fiction
Terraforming - Prose.
The term first appeared in a science-fiction novel, Seetee Shock (1949) by Jack Williamson, but the concept pre-dates that work. Olaf Stapledon's Last and First Men (1930) provides an example in fiction in which Venus is modified, after a long and destructive war with the original inhabitants, who naturally object to the process.
Even earlier, H. G. Wells alludes to xeno-terraforming - alien life altering Earth for their own benefit - in his 1898 novel The War of the Worlds. When the Martians arrive they bring with them a red weed that spreads an ...
See also:Terraforming, Terraforming - History of scholarly study, Terraforming - Ethical issues, Terraforming - Theoretical methods of terraforming, Terraforming - Mars, Terraforming - Venus, Terraforming - Other worlds, Terraforming - Paraterraforming, Terraforming - In fiction, Terraforming - Prose, Terraforming - Television and film, Terraforming - Miscellanea Read more here: » Terraforming: Encyclopedia II - Terraforming - In fiction |
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| | | | | microwave ovens: Encyclopedia II - Birmingham - Sport A cricket club was in existence in Birmingham as early as 1745, and today the city is home to Warwickshire County Cricket Club whose ground at Edgbaston is also a venue for international test matches. International athletics meetings take place at the open-air Alexander Stadium in Perry Barr, the home of Birchfield Harriers athletic club, which numbers many Olympic medallists among its past and present members. The National Indoor Arena (NIA) meanwhile is a major indoor athletics stadium and in 2003 hosted the 9th IAAF World Indoor Championships in Athletics. ...
See also:Birmingham, Birmingham - History, Birmingham - Geography, Birmingham - Economy, Birmingham - Architecture, Birmingham - Politics, Birmingham - Places of interest, Birmingham - Famous residents, Birmingham - Transport, Birmingham - Education, Birmingham - Sport, Birmingham - Food & drink, Birmingham - Culture and arts, Birmingham - Popular music, Birmingham - Classical music, Birmingham - Theatre, Birmingham - Literature, Birmingham - Visual art, Birmingham - Festivals and shows, Birmingham - Film and media, Birmingham - Science and invention, Birmingham - Twinning Read more here: » Birmingham: Encyclopedia II - Birmingham - Sport |
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| | | | | microwave ovens: Encyclopedia II - Sir John Randall - Origins John Randall was born on 23 March 1905 at Newton-le-Willows, Lancashire, the only son and the first of the three children of Sidney Randall, nurseryman and seedsman, and his wife, Hannah Cawley, daughter of John Turton, colliery manager in the area. He was educated at the grammar school at Ashton-in-Makerfield and at the University of Manchester, where he was awarded a first-class honours degree in physics and a graduate prize in 1925, and an MSc in 1926. He married Doris, daughter of Josiah John Duckworth, a c ...
See also:Sir John Randall, Sir John Randall - Origins, Sir John Randall - The Magnetron, Sir John Randall - King's College London, Sir John Randall - Later Years, Sir John Randall - Honours, Sir John Randall - Maurice Wilkins wrote this about Randall for the Royal Society on his death:, Sir John Randall - Books featuring Sir John Randall Read more here: » Sir John Randall: Encyclopedia II - Sir John Randall - Origins |
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