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Backdraft
A backdraft (North American English), backdraught (British English) or smoke explosion is the abrupt combustion, burning of superheated gases in a fire caused when oxygen rapidly enters a hot, oxygen-depleted environment; for example, when a window or door to an enclosed space is opened or broken. Backdrafts are typically seen as a blast of smoke and/or flame out of an opening of a building. Backdrafts present a serious threat to firefighters. There is some debate concerning whether backdrafts should be considered a type of flashover. Burning When material is heated enough, it begins to break down into smaller compounds, including flammable or even explosive gas, typically Hydrocarbon, hydrocarbons. This is called pyrolysis, and does not require oxygen. If oxygen is also provided, then the hydrocarbons can combust, starting a fire. If material undergoing pyrolysis is later given sufficient oxygen, the hydrocarbons will ignite, and therefore, combustion takes place. Cause A ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backdraft (film)
''Backdraft'' is a 1991 American action thriller film directed by Ron Howard and written by Gregory Widen. Starring Kurt Russell, William Baldwin, Scott Glenn, Jennifer Jason Leigh, Rebecca De Mornay, Donald Sutherland, Robert De Niro, Jason Gedrick and J. T. Walsh, it follows Chicago firefighters on the trail of a serial arsonist. It was released on May 24, 1991, to mixed reviews, and grossed $152.4 million worldwide. It received three Academy Award nominations for Best Sound, Best Sound Editing and Best Visual Effects. It also inspired a special effects attraction at Universal Studios Hollywood, which opened in 1992 and closed in 2010. It was followed by the sequel, ''Backdraft 2'', in 2019, with Baldwin and Sutherland reprising their roles. Plot Two firefighters of Engine 17 of the Chicago Fire Department (CFD) are brothers: the elder, Lieutenant Stephen "Bull" McCaffrey, is experienced, while Brian has labored in his brother's shadow. Brian returns to firefightin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firefighting
Firefighting is a profession aimed at controlling and extinguishing fire. A person who engages in firefighting is known as a firefighter or fireman. Firefighters typically undergo a high degree of technical training. This involves structural firefighting and wildland firefighting. Specialized training includes aircraft firefighting, shipboard firefighting, aerial firefighting, maritime firefighting, and proximity firefighting. Firefighting is a dangerous profession due to the toxic environment created by combustible materials, with major risks being smoke, oxygen deficiency, elevated temperatures, poisonous atmospheres, and violent air flows. To combat some of these risks, firefighters carry self-contained breathing apparatus. Additional hazards include falling (accident), falls – a constant peril while navigating unfamiliar layouts or confined spaces amid shifting debris under limited visibility – and structural collapse that can exacerbate the problems encountered in a toxi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firefighter
A firefighter (or fire fighter or fireman) is a first responder trained in specific emergency response such as firefighting, primarily to control and extinguish fires and respond to emergencies such as hazardous material incidents, medical incidents, and emergencies that require response from the public that threaten life, property and the environment, as well as to rescue persons from confinement or dangerous situations and preserve evidence. Firefighters may also provide ordinance regulations, safety requirements, and administrative public functions for the communities and areas they are subject to jurisdiction to. Male firefighters are sometimes referred to as firemen (and, less commonly, female firefighters as firewomen). The fire department, also known in some countries as the fire brigade or fire service, is one of the three main emergency services. From urban areas to aboard ships, firefighters have become ubiquitous around the world. The skills required for safe oper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flashover
A flashover is the near-simultaneous ignition of most of the directly exposed combustible material in an enclosed area. When certain organic materials are heated, they undergo thermal decomposition and release flammable gases. Flashover occurs when the majority of the exposed surfaces in a space are heated to their autoignition temperature and emit flammable gases (see also flash point). Flashover normally occurs at or for ordinary combustibles and an incident heat flux at floor level of . An example of flashover is the ignition of a piece of furniture in a domestic room. The fire involving the initial piece of furniture can produce a layer of hot smoke, which spreads across the ceiling in the room. The hot buoyant smoke layer grows in depth, as it is bounded by the walls of the room. The thermal radiation, radiated heat from this layer heats the surfaces of the directly exposed combustible materials in the room, causing them to give off flammable gases, via pyrolysis. When the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North American English
North American English (NAmE) encompasses the English language as spoken in both the United States and Canada. Because of their related histories and cultures, plus the similarities between the pronunciations (accents), vocabulary, and grammar of American English, U.S. English and Canadian English, linguists often group the two together. Canadians are generally tolerant of both British and American spellings, although certain words always take British spellings (e.g., ''cheque'') and others American spellings (e.g., ''tire'' rather than ''tyre''). Dialects of English spoken by United Empire Loyalists who fled the American Revolution (1775–1783) have had a large influence on Canadian English from its early roots. Some terms in North American English are used almost exclusively in Canada and the United States (for example, the terms ''diaper'' and ''gasoline'' are widely used instead of ''nappy'' and ''petrol''). Although many English speakers from outside North America regard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flammability Limit
Flammability limits or explosive limits are the ranges of fuel concentrations in relation to oxygen from the air. Combustion can range in violence from deflagration through detonation. Limits vary with temperature and pressure, but are normally expressed in terms of volume percentage at 25 °C and atmospheric pressure. These limits are relevant both in producing and optimising explosion or combustion, as in an engine, or to preventing it, as in uncontrolled explosions of build-ups of combustible gas or dust. Attaining the best combustible or explosive mixture of a fuel and air (the stoichiometric proportion) is important in internal combustion engines such as gasoline or diesel engines. The standard reference work is still that elaborated by Michael George Zabetakis, a fire safety engineering specialist, using an apparatus developed by the United States Bureau of Mines. Violence of combustion Combustion can vary in degree of violence. A deflagration is a propagation of a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire Protection
Fire protection is the study and practice of mitigating the unwanted effects of potentially Conflagration, destructive fires. It involves the study of the behaviour, Compartmentalization (fire protection), compartmentalisation, suppression and investigation of fire and its related emergencies, as well as the research and development, production, testing and application of mitigating systems. In structures, be they land-based, offshore or even ships, owners and operators may be responsible for maintaining their facilities in accordance with a design-basis rooted in law, including local building code, building and fire code, fire codes. Buildings must be maintained in accordance with the current fire code, enforced by fire prevention officers of a local fire department. In the event of fire emergencies, Firefighters, fire investigators, and other fire prevention personnel are called to mitigate, investigate and learn from the Fire damage, damage of a fire. Classifying fires When dec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire
Fire is the rapid oxidation of a fuel in the exothermic chemical process of combustion, releasing heat, light, and various reaction Product (chemistry), products. Flames, the most visible portion of the fire, are produced in the combustion reaction when the fuel reaches its ignition point temperature. Flames from hydrocarbon fuels consist primarily of carbon dioxide, water vapor, oxygen, and nitrogen. If hot enough, the gases may become ionized to produce Plasma (physics), plasma. The color and Intensity (heat transfer), intensity of the flame depend on the type of fuel and composition of the surrounding gases. Fire, in its most common form, has the potential to result in conflagration, which can lead to permanent physical damage. It directly impacts land-based ecological systems worldwide. The positive effects of fire include stimulating plant growth and maintaining ecological balance. Its negative effects include hazards to life and property, atmospheric pollution, and water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Combustion
Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combustion does not always result in fire, because a flame is only visible when substances undergoing combustion vaporize, but when it does, a flame is a characteristic indicator of the reaction. While activation energy must be supplied to initiate combustion (e.g., using a lit match to light a fire), the heat from a flame may provide enough energy to make the reaction self-sustaining. The study of combustion is known as combustion science. Combustion is often a complicated sequence of elementary reaction, elementary Radical (chemistry), radical reactions. Solid fuels, such as wood and coal, first undergo endothermic pyrolysis to produce gaseous fuels whose combustion then supplies the heat required to produce more of them. Combustion is often hot e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Before Crime * After Days
Before is the opposite of after, and may refer to: Literature * "Before" (short story) by Gael Baudino, 1996 * ''Before'' by Anna Todd, 2015 Music * ''Before'' (Gold Panda EP), 2009 * ''Before'' (James Blake EP), 2020 * "Before" (song), a 1996 song by the Pet Shop Boys * "Before", a song by the Empire of the Sun from ''Two Vines'' * "Before", a song by Anastacia from ''Evolution'' Television and film * ''Before trilogy'', by Richard Linklater ** ''Before Sunrise'', 1995 ** ''Before Sunset'', 2004 ** ''Before Midnight'', 2013 * ''Before'' (TV series), 2024 See also *Before Christ (BC), an epoch used in dating years prior to the estimated birth of Jesus *Before Common Era (BCE), an alternative naming of the traditional calendar era primarily used in academic circles *Before Present Before Present (BP) or "years before present (YBP)" is a time scale used mainly in archaeology, geology, and other scientific disciplines to specify when events occurred relative to the origin of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1408 (film)
''1408'' is a 2007 American psychological horror film based on Stephen King's 1999 short story. It was directed by Mikael Håfström, written by Matt Greenberg, Scott Alexander and Larry Karaszewski, and stars John Cusack and Samuel L. Jackson. The film follows Mike Enslin, an author who investigates allegedly haunted locales. Enslin receives an ominous warning not to enter room 1408 at a fictional New York City hotel, The Dolphin. Although skeptical of the paranormal, he is soon trapped in the room, where he experiences bizarre and frightful events. ''1408'' was released in the United States on June 22, 2007, by The Weinstein Company and Metro-Goldwyn-Mayer (MGM). Reviews were generally positive and it was a box-office success, grossing $133 million against a production budget of $25 million. Plot Mike Enslin is a cynical and skeptical author of niche books about supernatural events, in which he has no belief. While promoting his latest book in Hermosa Beach, California ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assassination
Assassination is the willful killing, by a sudden, secret, or planned attack, of a personespecially if prominent or important. It may be prompted by political, ideological, religious, financial, or military motives. Assassinations are ordered by both individuals and organizations, and are carried out by their accomplices. Acts of assassination have been performed since ancient times. A person who carries out an assassination is called an assassin. Etymology ''Assassin'' comes from the Italian and French Assissini, believed to derive from the word '' hashshashin'' (), and shares its etymological roots with '' hashish'' ( or ; from ').''The Assassins: a radical sect in Islam'' – Bernard Lewis, pp. 11–12 It referred to a group of Nizari Ismailis known as the Order of Assassins who worked against various political targets. Founded by Hassan-i Sabbah, the Assassins were active in the Near East from the 11th to the 13th centuries. The group killed members of the Ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
