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Blackout (wartime)
A blackout during war, or in preparation for an expected war, is the practice of collectively minimizing outdoor light, including upwardly directed (or reflected) light. This was done in the 20th century to prevent crews of enemy aircraft from being able to identify their targets by sight, such as during the London Blitz of 1940. In coastal regions, a shoreside blackout of city lights also helped protect ships from being seen silhouetted against the artificial light by enemy submarines farther out at sea. World War I Plans to black out British coastal towns in the event of war were drawn up in 1913 by Winston Churchill in his role as First Lord of the Admiralty; these plans were implemented on 12 August 1914, eight days after the United Kingdom had entered the war. On 1 October 1914, the Commissioner of the Metropolitan Police ordered that bright exterior lights were to be extinguished or dimmed in the London area and street lamps be partially painted out with black paint. Elsewhe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WPA Blackout Poster
WPA may refer to: Computing *Wi-Fi Protected Access, a wireless encryption standard *Windows Product Activation, in Microsoft software licensing * Wireless Public Alerting (Alert Ready), emergency alerts over LTE in Canada * Windows Performance Analyzer Organizations * Wisconsin Philosophical Association *World Pool-Billiard Association *World Psychiatric Association *Western Provident Association, United Kingdom United States *Works Progress Administration or Work Projects Administration, a former American New Deal agency *Washington Project for the Arts *Western Psychological Association *Women's Prison Association Other *''WPA'', a 2009 album by Works Progress Administration (band) *Win probability added, a baseball statistic *Water pinch analysis *Whistleblower Protection Act, a law protecting certain whistleblowers in the USA *Woomera Prohibited Area, a tract of land in South Australia covering more than 120,000 sq km of arid 'outback' *Waterfowl production area, land prote ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attack On Pearl Harbor
The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the naval base at Pearl Harbor in Honolulu, Territory of Hawaii, just before 8:00a.m. (local time) on Sunday, December 7, 1941. The United States was a neutral country at the time; the attack led to its formal entry into World War II the next day. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning. Japan intended the attack as a preventive action. Its aim was to prevent the United States Pacific Fleet from interfering with its planned military actions in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and those of the United States. Over the course of seven hours there were coordinated Japanese attacks on the US-held Philippines, Guam, and Wake Island and on the British ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basement
A basement or cellar is one or more Storey, floors of a building that are completely or partly below the storey, ground floor. It generally is used as a utility space for a building, where such items as the Furnace (house heating), furnace, water heating, water heater, breaker panel or fuse box, Garage (residential), car park, and air-conditioning system are located; so also are amenities such as the electrical system and cable television distribution point. In cities with high property prices, such as London, basements are often fitted out to a high standard and used as living space. In British English, the word ''basement'' is usually used for underground floors of, for example, department stores. The word is usually used with houses when the space below the ground floor is habitable, with windows and (usually) its own access. The word ''cellar'' applies to the whole underground level or to any large underground room. A ''subcellar'' is a cellar that lies further underneath ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bomb Shelter
A bomb shelter is a structure designed to provide protection against the effects of a bomb. Types of shelter Different kinds of bomb shelters are configured to protect against different kinds of attack and strengths of hostile explosives. Air raid shelter An air raid shelter is a structure built to protect against bomber planes dropping bombs over a large area. These were commonly seen during World War II, such as the " Anderson shelters" of the United Kingdom. Fallout shelter A fallout shelter is a shelter designed specifically for a nuclear war, with thick walls made from materials intended to block the radiation from fallout resulting from a nuclear explosion. Many such shelters were constructed as civil defense measures during the Cold War. A blast shelter protects against more conventional bomb blasts. Its main purpose is to protect from shock waves and overpressure and also from earthquake. Bunker While these forms of bomb shelters are equally amenable to civ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-flash White
Anti-flash white is a white colour commonly seen on British, Soviet, and U.S. nuclear bombers. The purpose of the colour is to reflect some of the thermal radiation from a nuclear explosion, protecting the aircraft and its occupants. China Some variants of the Xian H-6 had the underside of the fuselage painted anti-flash white. Soviet Union/Russia Some nuclear bombers had the underside of the fuselage painted anti-flash white with the upper surfaces painted light silver-gray. This was true for the specially fitted, single Soviet Tu-95V bomber that test-deployed the most powerful bomb of any kind – the 50+ MT-rating ''Tsar Bomba'' on 30 October 1961 – as it had the anti-flash white on all its undersurfaces and sides. The Tupolev Tu-160 of the 1980s was the first series-built Soviet/Russian bomber aircraft to be painted anti-flash white all over, leading to its ''Beliy Lebed'' ("White Swan") Russian nickname. United Kingdom Anti-flash white was used on the Royal Air Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackout (fabric)
Blackout refers to a foam-backed, opaque fabric used to black out light invented by Pablo Davila. Blackout fabrics are most commonly found in hotel rooms as curtain linings or drapery fabrics, blocking much of the light that would otherwise enter through a window when the curtains are closed. For travelers, third shift workers, and parents of babies, blackout is an essential element in the bedroom. Besides window coverings, other uses for blackout fabrics include wallpaper, movie projector screens and planetarium A planetarium ( planetariums or ''planetaria'') is a Theater (structure), theatre built primarily for presenting educational entertainment, educational and entertaining shows about astronomy and the night sky, or for training in celestial navi ... domes. Manufacture The process of manufacturing blackout was invented by Baltimore-based Rockland Industries, and involves coating a fabric with layers of foam, or ‘passes’. A ‘2-pass’ blackout is produced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Raid Siren
A civil defense siren, also known as an air-raid siren or tornado siren, is a siren used to provide an emergency population warning to the general population of approaching danger. It is sometimes sounded again to indicate the danger has passed. Some sirens, especially within small towns, are also used to call the volunteer fire department when needed. Initially designed to warn city dwellers of air raids in World War II, they were later used to warn of nuclear attack and natural destructive weather patterns, such as tornadoes. The generalized nature of sirens led to many of them being replaced with more specific warnings, such as the broadcast-based Emergency Alert System and the Cell Broadcast-based Wireless Emergency Alerts and EU-Alert mobile technologies. A mechanical siren generates sound by spinning a slotted chopper wheel to interrupt a stream of air at a regular rate. Modern sirens can develop a sound level of up to 135 decibels at . The Chrysler air raid sir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Civil Defense
Civil defense ( en, region=gb, civil defence) or civil protection is an effort to protect the citizens of a state (generally non-combatants) from man-made and natural disasters. It uses the principles of emergency operations: prevention, mitigation, preparation, response, or emergency evacuation and recovery. Programs of this sort were initially discussed at least as early as the 1920s and were implemented in some countries during the 1930s as the threat of war and aerial bombardment grew. Civil-defense structures became widespread after authorities recognised the threats posed by nuclear weapons. Since the end of the Cold War, the focus of civil defense has largely shifted from responding to military attack to dealing with emergencies and disasters in general. The new concept is characterised by a number of terms, each of which has its own specific shade of meaning, such as ''crisis management'', '' emergency management'', ''emergency preparedness'', ''contingency plannin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detroit
Detroit ( , ; , ) is the largest city in the U.S. state of Michigan. It is also the largest U.S. city on the United States–Canada border, and the seat of government of Wayne County. The City of Detroit had a population of 639,111 at the 2020 census, making it the 27th-most populous city in the United States. The metropolitan area, known as Metro Detroit, is home to 4.3 million people, making it the second-largest in the Midwest after the Chicago metropolitan area, and the 14th-largest in the United States. Regarded as a major cultural center, Detroit is known for its contributions to music, art, architecture and design, in addition to its historical automotive background. '' Time'' named Detroit as one of the fifty World's Greatest Places of 2022 to explore. Detroit is a major port on the Detroit River, one of the four major straits that connect the Great Lakes system to the Saint Lawrence Seaway. The City of Detroit anchors the second-largest regional eco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtain
A curtain is a piece of cloth Textile is an umbrella term that includes various fiber-based materials, including fibers, yarns, filaments, threads, different fabric types, etc. At first, the word "textiles" only referred to woven fabrics. However, weaving is not the ... or other material intended to block or obscure light, air drafts, or (in the case of a shower curtain), water. A curtain is also the movable screen or theater curtain, drape in a theatre that separates the stage from the auditorium or that serves as a backdrop/background. Curtains are often hung on the inside of a building's windows to block the passage of light. For instance, at night to aid sleeping, or to stop light from escaping outside the building (stopping people outside from being able to see inside, often for privacy reasons). In this application, they are also known as "draperies". Curtains hung over a doorway are known as portières. Curtains come in a variety of shapes, materials, sizes, c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackout Curtain (AM 2014
Blackout(s), black out, or The Blackout may refer to: Loss of lighting or communication * Power outage, a loss of electric power * Blackout (broadcasting), a regulatory or contractual ban on the broadcasting of an event * Blackout (fabric), a textile material that blocks light * Blackout (wartime), the practice of minimizing outdoor lighting for protection from attack * Communications blackout, a halt to communication abilities or utilization * Media blackout, censorship of news related to a certain topic * Protests against SOPA and PIPA, the 2012 web blackout Medicine * Blackout (drug-related amnesia), loss of memory with medicines or alcoholic beverages * Blackout or lost time, a common symptom of psychogenic amnesia and dissociative identity disorder * Syncope (medicine), a loss of consciousness, also known as fainting * Freediving blackout, a loss of consciousness caused by cerebral Hypoxia (medical), hypoxia towards the end of a breath-hold dive * Transient global amnesia, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Second Happy Time
The "Second Happy Time" (; officially Operation Paukenschlag ("Operation Drumbeat"), and also known among German submarine commanders as the "American Shooting Season") was a phase in the Battle of the Atlantic during which Axis submarines attacked merchant shipping and Allied naval vessels along the east coast of North America. The first "Happy Time" was in 1940–1941 in the North Atlantic and North Sea. Adolf Hitler and Benito Mussolini declared war on the United States on 11 December 1941, and as a result their navies could begin the "Second Happy Time". The "Second Happy Time" lasted from January 1942 to about August of that year and involved several German naval operations, including Operation Neuland. German submariners named it the "Happy Time" or the "Golden Time," as defense measures were weak and disorganized, and the U-boats were able to inflict massive damage with little risk. During this period, Axis submarines sank 609 ships totaling 3.1 million tons. This le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
