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Canopy (parachute)
A parachute is a device designed to slow an object's descent through an atmosphere by creating Drag (physics), drag or aerodynamic Lift (force), lift. It is primarily used to safely support people exiting aircraft at height, but also serves various purposes like slowing cargo, aiding in space capsule recovery, and stabilizing vehicles or objects. Modern parachutes are typically made from durable fabrics like nylon and come in various shapes, such as dome-shaped, rectangular, and inverted domes, depending on their specific function. The concept of the parachute dates back to ancient attempts at flight. In 852 AD, Armen Firman, in Córdoba, Spain, made the first recorded jump with a large cloak to slow his fall. Renaissance figures like Francesco di Giorgio Martini and Leonardo da Vinci later sketched designs resembling modern parachutes, but it wasn’t until the 18th century that the first successful jumps occurred. French Louis-Sébastien Lenormand made the first public jump i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bangladesh Air Force (BAF) Paratroopers Jump From A U
The Bangladesh Air Force (BAF) () is the aerial warfare branch of the Bangladesh Armed Forces. The air force is primarily responsible for air defence of Bangladesh's sovereign territory as well as providing air support to the Bangladesh Army and Bangladesh Navy. Furthermore, the BAF has a territorial role in providing tactical and strategic air transport and logistics capability for the country. Since its establishment on 28 September 1971, the Bangladesh Air Force has been involved in various combat and humanitarian operations, from the Bangladesh Liberation War in which it was born, to support international efforts including United Nations peacekeeping missions. Operation Kilo Flight was a famous operation conducted by the Bangladesh Air Force during the Bangladesh Liberation War. History Foundation The Bangladesh Air Force (BAF) was officially formed on 28 September 1971 during the Bangladesh Liberation War, and consisted of revolting Bengali officers and airmen who defe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conical Parachute, 1470s, British Museum Add
In geometry, a cone is a three-dimensional figure that tapers smoothly from a flat base (typically a circle) to a point not contained in the base, called the ''apex'' or '' vertex''. A cone is formed by a set of line segments, half-lines, or lines connecting a common point, the apex, to all of the points on a base. In the case of line segments, the cone does not extend beyond the base, while in the case of half-lines, it extends infinitely far. In the case of lines, the cone extends infinitely far in both directions from the apex, in which case it is sometimes called a ''double cone''. Each of the two halves of a double cone split at the apex is called a ''nappe''. Depending on the author, the base may be restricted to a circle, any one-dimensional quadratic form in the plane, any closed one-dimensional figure, or any of the above plus all the enclosed points. If the enclosed points are included in the base, the cone is a solid object; otherwise it is an open surface, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Croats
The Croats (; , ) are a South Slavs, South Slavic ethnic group native to Croatia, Bosnia and Herzegovina and other neighboring countries in Central Europe, Central and Southeastern Europe who share a common Croatian Cultural heritage, ancestry, Culture of Croatia, culture, History of Croatia, history and Croatian language, language. They also form a sizeable minority in several neighboring countries, namely Croats of Slovenia, Slovenia, Burgenland Croats, Austria, the Croats in the Czech Republic, Czech Republic, Croats in Germany, Germany, Croats of Hungary, Hungary, Croats of Italy, Italy, Croats of Montenegro, Montenegro, Croats of Romania, Romania, Croats of Serbia, Serbia and Croats in Slovakia, Slovakia. Due to political, social and economic reasons, many Croats migrated to North and South America as well as New Zealand and later Australia, establishing a Croatian diaspora, diaspora in the aftermath of World War II, with grassroots assistance from earlier communities an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homo Volans
''Homo'' () is a genus of great ape (family Hominidae) that emerged from the genus ''Australopithecus'' and encompasses only a single extant species, ''Homo sapiens'' (modern humans), along with a number of extinct species (collectively called archaic humans) classified as either ancestral or closely related to modern humans; these include '' Homo erectus'' and '' Homo neanderthalensis''. The oldest member of the genus is '' Homo habilis'', with records of just over 2 million years ago. ''Homo'', together with the genus ''Paranthropus'', is probably most closely related to the species ''Australopithecus africanus'' within ''Australopithecus''.'''' The closest living relatives of ''Homo'' are of the genus '' Pan'' ( chimpanzees and bonobos), with the ancestors of ''Pan'' and ''Homo'' estimated to have diverged around 5.7–11 million years ago during the Late Miocene. ''H. erectus'' appeared about 2 million years ago and spread throughout Africa (debatably ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasol
An umbrella or parasol is a folding canopy (building), canopy supported by wooden or metal ribs that is mounted on a wooden, metal, or plastic pole. It is usually designed to protect a person against rain. The term ''umbrella'' is traditionally used when protecting oneself from rain, while ''parasol'' is used when protecting oneself from sunlight, though the terms continue to be used interchangeably. Often the difference is the material used for the canopy; some parasols are not waterproof, and some umbrellas are Transparency and translucency, transparent. Umbrella canopies may be made of fabric or flexible plastic. There are also combinations of parasol and umbrella that are called ''en-tout-cas'' (French for "in any case"). Generally speaking, parasols and umbrellas are small, handheld, personal use items. Golf umbrellas are the biggest hand-portable umbrellas available. There are two types of umbrellas: completely collapsible umbrellas, which can be folded up into a small en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lynn White
Lynn Townsend White Jr. (April 29, 1907 – March 30, 1987) was an American historian of technology and college president. He was an instructor in medieval history at Princeton University from 1933 to 1937, a professor at Stanford University from 1937 to 1943, president of Mills College, Oakland, California, from 1943 to 1958, and a professor at the University of California, Los Angeles from 1958 until 1987. He is best known for the controversial book ''Medieval Technology and Social Change'' (1962) and for controversial articles on religion, technology, and ecology such as "Dynamo and Virgin Reconsidered" ('' The American Scholar'', 1958) and "The Historical Roots of Our Ecologic Crisis" (''Science'', 1967). White helped to found the Society for the History of Technology and was its president from 1960 to 1962. He won the 1963 Pfizer Award for ''Medieval Technology and Social Change'' and the Leonardo da Vinci Medal in 1964. Early life and education White was born April 29 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fox News
The Fox News Channel (FNC), commonly known as Fox News, is an American Multinational corporation, multinational Conservatism in the United States, conservative List of news television channels, news and political commentary Television station, television channel and website based in New York City, U.S. It is owned by Fox News Media, which itself is owned by Fox Corporation. It is the most-watched cable news network in the U.S., and as of 2023 it generates approximately 70% of its parent company's pre-tax profit. The channel broadcasts primarily from studios at 1211 Avenue of the Americas in Midtown Manhattan. Fox News provides a service to 86 countries and territories, with international broadcasts featuring Fox Extra segments during advertising breaks. The channel was created by Australian-born American media mogul Rupert Murdoch in 1996 to appeal to a conservative audience, hiring former Republican Party (United States), Republican media consultant and CNBC executive Roger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC News
BBC News is an operational business division of the British Broadcasting Corporation (BBC) responsible for the gathering and broadcasting of news and current affairs in the UK and around the world. The department is the world's largest broadcast news organisation and generates about 120 hours of radio and television output each day, as well as online news coverage. The service has over 5,500 journalists working across its output including in 50 foreign news bureaus where more than 250 foreign correspondents are stationed. Deborah Turness has been the CEO of news and current affairs since September 2022. In 2019, it was reported in an Ofcom report that the BBC spent £136m on news during the period April 2018 to March 2019. BBC News' domestic, global and online news divisions are housed within the largest live newsroom in Europe, in Broadcasting House in central London. Parliamentary coverage is produced and broadcast from studios in London. Through BBC English Regions, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adrian Nicholas
Adrian Nicholas (4 March 1962 – 17 September 2005) was a British skydiver who completed more than 8,000 jumps in 30 countries. He is best known for his successful test in July 2000 of Leonardo da Vinci's (1452–1519) parachute design, proving it to be in retrospect the world's first working parachute. A modified pyramidal design was later also successfully tested by his Swiss colleague Olivier Vietti-Teppa. World records On 12 March 1999, Nicholas stepped out of an aeroplane at . He flew for 4 minutes, 55 seconds and covered a distance of , establishing new world records for the longest sky dive and the furthest human flight. During the attempt the exhaust valve of his oxygen mask froze preventing him from breathing properly for about four minutes. Death On 17 September 2005 Nicholas was jumping in Texel, the Netherlands. While performing a high speed landing manoeuvre, his automatic activation device In skydiving, an automatic activation device (AAD) is a dead ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British People
British people or Britons, also known colloquially as Brits, are the citizens of the United Kingdom, the British Overseas Territories, and the Crown dependencies.: British nationality law governs modern British citizenship and nationality, which can be acquired, for instance, by descent from British nationals. When used in a historical context, "British" or "Britons" can refer to the Ancient Britons, the Celtic languages, Celtic-speaking inhabitants of Great Britain during the British Iron Age, Iron Age, whose descendants formed the major part of the modern Welsh people, Cornish people, Bretons and considerable proportions of English people. It also refers to those British subjects born in parts of the former British Empire that are now independent countries who settled in the United Kingdom prior to 1973. Though early assertions of being British date from the Late Middle Ages, the Union of the Crowns in 1603 and the creation of the Kingdom of Great Britain in 1707 triggered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamburg
Hamburg (, ; ), officially the Free and Hanseatic City of Hamburg,. is the List of cities in Germany by population, second-largest city in Germany after Berlin and List of cities in the European Union by population within city limits, 7th-largest in the European Union with a population of over 1.9 million. The Hamburg Metropolitan Region has a population of over 5.1 million and is the List of EU metropolitan areas by GDP, eighth-largest metropolitan region by GDP in the European Union. At the southern tip of the Jutland Peninsula, Hamburg stands on the branching River Elbe at the head of a estuary to the North Sea, on the mouth of the Alster and Bille (Elbe), Bille. Hamburg is one of Germany's three city-states alongside Berlin and Bremen (state), Bremen, and is surrounded by Schleswig-Holstein to the north and Lower Saxony to the south. The Port of Hamburg is Germany's largest and Europe's List of busiest ports in Europe, third-largest, after Port of Rotterdam, Rotterda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Renaissance Technology
Renaissance technology was the set of European artifacts and inventions which spread through the Renaissance period, roughly the 14th century through the 16th century. The era is marked by profound technical advancements such as the printing press, linear perspective in drawing, patent law, double shell domes and bastion fortresses. Sketchbooks from artisans of the period ( Taccola and Leonardo da Vinci, for example) give a deep insight into the mechanical technology then known and applied. Renaissance science spawned the Scientific Revolution; science and technology began a cycle of mutual advancement. Renaissance technology Some important Renaissance technologies, including both innovations and improvements on existing techniques: *mining and metallurgy *blast furnace enabled iron to be produced in significant quantities *finery forge enabled pig iron (from the blast furnace) into bar iron (wrought iron) *slitting mill mechanized the production of iron rods for nailmakin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
