|
Underground Construction
Underground construction refers to the construction of underground tunnels, shafts, chambers, and passageways, it is also sometimes used to describe the portion of traditional construction that takes place below grade. History Neanderthals also engaged in underground construction but they were believed to be less sophisticated in that regard than humans. Neanderthal construction sites in France have been dated to 174,000 bc, far earlier than the earliest human sites. Human underground construction likely began with cave dwelling pre-historic people who wanted to expand their home. The purpose of many ancient underground structures is a mystery, for instance erdstalls which are found across Europe. All ancient civilizations practiced some form of underground construction with some also branching into rock-cut architecture. In early urban centers underground spaces served as burial places, provided protection against invaders, and enabled early public utilities. The first known use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sapporo Underground Under Construction
( ain, サッ・ポロ・ペッ, Satporopet, lit=Dry, Great River) is a city in Japan. It is the largest city north of Tokyo and the largest city on Hokkaido, the northernmost main island of the country. It ranks as the fifth most populous city in Japan. It is the capital city of Hokkaido Prefecture and Ishikari Subprefecture. Sapporo lies in the southwest of Hokkaido, within the alluvial fan of the Toyohira River, which is a tributary stream of the Ishikari. It is considered the cultural, economic, and political center of Hokkaido. As with most of Hokkaido, the Sapporo area was settled by the indigenous Ainu people, beginning over 15,000 years ago. Starting in the late 19th century, Sapporo saw increasing settlement by Yamato migrants. Sapporo hosted the 1972 Winter Olympics, the first Winter Olympics ever held in Asia, and the second Olympic games held in Japan after the 1964 Summer Olympics. Sapporo is currently bidding for the 2030 Winter Olympics. The Sapporo Dome hos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Occupational Safety And Health Administration
The Occupational Safety and Health Administration'' (OSHA ) is a large regulatory agency of the United States Department of Labor that originally had federal visitorial powers to inspect and examine workplaces. Congress established the agency under the Occupational Safety and Health Act OSH Act, which President Richard M. Nixon signed into law on December 29, 1970. OSHA's mission is to "assure safe and healthy working conditions for working men and women by setting and enforcing standards and by providing training, outreach, education, and assistance". The agency is also charged with enforcing a variety of whistleblower statutes and regulations. OSHA's workplace safety inspections have been shown to reduce injury rates and injury costs without adverse effects on employment, sales, credit ratings, or firm survival. History The Bureau of Labor Standards of the Department of Labor has worked on some work safety issues since its creation in 1922. Economic boom and associated l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underground City (Beijing)
The Underground City () is a Cold War era bomb shelter consisting of a network of tunnels located beneath Beijing, China. It has also been referred to as the Underground Great Wall since it was built for the purpose of military defense. The complex was constructed from 1969 to 1979 in anticipation of a nuclear war with the Soviet Union, as Sino-Soviet relations worsenedJiang, Steven.Beijing Journal: An underground 'parallel universe'. Cable News Network (2008-02-01). Retrieved on 2008-07-14.Wang, Zhiyong.. China Internet Information Center (2005-04-15). Retrieved on 2008-07-14. and was officially reopened in 2000. Visitors were allowed to tour portions of the complex, . Beijing China Tourist Information and Travel Guide. Retrieved on 2008-07-14. which has been described as "dark, damp, and genuinely eerie". [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metro-2
Metro-2 () is the informal name for a purported secret underground metro system which parallels the public Moscow Metro (known as Metro-1 when in comparison with Metro-2). The system was supposedly built, or at least started, during the time of Joseph Stalin and was codenamed D-6 (Д-6) by the KGB. It is supposedly still operated by the Main Directorate of Special Programmes and Ministry of Defence. Metro-2 is said to have four lines which lie deep. It is said to connect the Kremlin with the Federal Security Service (FSB) headquarters, the government airport at Vnukovo-2, and an underground town at Ramenki, in addition to other locations of national importance. In 1994, the leader of an urban exploration group, the Diggers of the Underground Planet, claimed to have found an entrance to this underground system. Historic evidence however paints a much more conservative picture, with one "line" existing by the late 1960s, from the Kremlin, specifically site 103, to the site 5 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheyenne Mountain Complex
The Cheyenne Mountain Complex is a Space Force installation and defensive bunker located in unincorporated El Paso County, Colorado, next to the city of Colorado Springs, at the Cheyenne Mountain Space Force Station, which hosts the activities of several tenant units. Also located in Colorado Springs is Peterson Space Force Base, where the North American Aerospace Defense Command (NORAD) and United States Northern Command (USNORTHCOM) headquarters are located. Formerly the center for the United States Space Command and NORAD, the Complex monitored the air space of Canada and the United States for missiles, space systems, and foreign aircraft through its worldwide early-warning system. Since 2008, NORAD and the United States Space Command have been based at Peterson Space Force Base and the complex, re-designated as an Air Force station, is used for crew training and as a back-up command center if required. The military complex has included, in the past, many units of NORAD, U.S. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missile Silos
A missile launch facility, also known as an underground missile silo, launch facility (LF), or nuclear silo, is a vertical cylindrical structure constructed underground, for the storage and launching of intercontinental ballistic missiles (ICBMs), intermediate-range ballistic missiles (IRBMs), medium-range ballistic missiles (MRBMs). Similar facilities can be used for anti-ballistic missiles (ABMs). The structures typically have the missile some distance below ground, protected by a large "blast door" on top. They are usually connected, physically and/or electronically, to a missile launch control center. With the introduction of the Soviet UR-100 and the U.S. Titan II missile series, underground silos changed in the 1960s. Both missile series introduced the use of hypergolic propellant, which could be stored in the missiles, allowing for rapid launches. Both countries' liquid-fueled missile systems were moved into underground silos. The introduction of solid fuel systems, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forced Labour Under German Rule During World War II
The use of slave and forced labour in Nazi Germany (german: Zwangsarbeit) and throughout German-occupied Europe during World War II took place on an unprecedented scale. It was a vital part of the German economic exploitation of conquered territories. It also contributed to the mass extermination of populations in occupied Europe. The Germans abducted approximately 12 million people from almost twenty European countries; about two thirds came from Central Europe and Eastern Europe.Part1 an Part 2 . Many workers died as a result of their living conditionsextreme mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fortifications
A fortification is a military construction or building designed for the defense of territories in warfare, and is also used to establish rule in a region during peacetime. The term is derived from Latin ''fortis'' ("strong") and ''facere'' ("to make"). From very early history to modern times, defensive walls have often been necessary for cities to survive in an ever-changing world of invasion and conquest. Some settlements in the Indus Valley civilization were the first small cities to be fortified. In ancient Greece, large stone walls had been built in Mycenaean Greece, such as the ancient site of Mycenae (famous for the huge stone blocks of its 'cyclopean' walls). A Greek '' phrourion'' was a fortified collection of buildings used as a military garrison, and is the equivalent of the Roman castellum or English fortress. These constructions mainly served the purpose of a watch tower, to guard certain roads, passes, and borders. Though smaller than a real fortress, they acted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subterranea (geography)
Subterranea are ''underground structures'', both natural (such as caves) and human-made (such as Mining, mines). Some subterranea and related topics include: Natural * Caves ** Cenote ** Ice cave ** Sea cave ** Sinkhole * Karst * Lava tube ** Lunar lava tube, Lunar and Martian lava tubes * Subterranean river * Subterranean waterfall * Underground lake * Volcanic pipe Human-made or related * Borehole * Bunker * Burial vault (tomb) * Casemate * Catacombs * Cave dweller, Underground living * Cave temple * Basement, Cellar * Dungeon * Dugout (shelter) * Fogou * Mining, Mine * Rock cut architecture, rock-cut tomb * Smuggling tunnel * Tunnels (street tunnel, train tunnels) * Underground city, umbrella article for underground dwellings and facilities * Underground rapid transit system * Wine cave See also * Boring (earth) * Seattle Underground * Subterranean London Subterranea (geography), {{geo-term-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paris Metro Construction 03300288-3
Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, fashion, gastronomy, and science. For its leading role in the arts and sciences, as well as its very early system of street lighting, in the 19th century it became known as "the City of Light". Like London, prior to the Second World War, it was also sometimes called the capital of the world. The City of Paris is the centre of the Île-de-France region, or Paris Region, with an estimated population of 12,262,544 in 2019, or about 19% of the population of France, making the region France's primate city. The Paris Region had a GDP of €739 billion ($743 billion) in 2019, which is the highest in Europe. According to the Economist Intellige ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archeology
Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscapes. Archaeology can be considered both a social science and a branch of the humanities. It is usually considered an independent academic discipline, but may also be classified as part of anthropology (in North America – the four-field approach), history or geography. Archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. Archaeology is distinct from palaeontology, which is the study of fossil remains. Archaeology is particularly important for learning about prehistoric societies, for which, by definition, there are no written records. Prehistory includes over 99% of the human past, from the Paleolithic until the adven ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Broadcasting Corporation
The Australian Broadcasting Corporation (ABC) is the national broadcaster of Australia. It is principally funded by direct grants from the Australian Government and is administered by a government-appointed board. The ABC is a publicly-owned body that is politically independent and fully accountable, with its charter enshrined in legislation, the ''Australian Broadcasting Corporation Act 1983''. ABC Commercial, a profit-making division of the corporation, also helps to generate funding for content provision. The ABC was established as the Australian Broadcasting Commission on 1 July 1932 by an act of federal parliament. It effectively replaced the Australian Broadcasting Company, a private company established in 1924 to provide programming for A-class radio stations. The ABC was given statutory powers that reinforced its independence from the government and enhanced its news-gathering role. Modelled after the British Broadcasting Corporation (BBC), which is funded by a tel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.JPG "Click for more on -> Missile Silos")
.jpg "Click for more on -> Archeology")
