A flamethrower is a ranged incendiary device designed to project a controllable jet of fire. First deployed by the Byzantine Empire in the 7th century AD, flamethrowers saw use in modern times during World War I, and more widely in World War II as a tactical weapon against fortifications.
A spark plug is an electrical device used in an internal combustion engine to produce a spark which ignites the air-fuel mixture in the combustion chamber. As part of the engine's ignition system, the spark plug receives high-voltage electricity which it uses to generate a spark in the small gap between the positive and negative electrodes. The timing of the spark is a key factor in the engine's behaviour, and the spark plug usually operates shortly before the combustion stroke commences.
A backdraft or backdraught is the abrupt 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.
Tinder is easily combustible material used to start a fire. Tinder is a finely divided, open material which will begin to glow under a shower of sparks. Air is gently wafted over the glowing tinder until it bursts into flame. The flaming tinder is used to ignite kindling, which in turn is used to ignite the bulk material, to produce a fire.
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. Flashover normally occurs at 500 °C (932 °F) or 590 °C (1,100 °F) for ordinary combustibles and an incident heat flux at floor level of 20 kilowatts per square metre (2.5 hp/sq ft).
A ceiling is an overhead interior surface that covers the upper limits of a room. It is not generally considered a structural element, but a finished surface concealing the underside of the roof structure or the floor of a story above. Ceilings can be decorated to taste, and there are many examples of frescoes and artwork on ceilings, especially within religious buildings. A ceiling can also be the upper limit of a tunnel.
Clarence Dock was a dock on the River Mersey, England, and part of the Port of Liverpool. Situated in the northern dock system in Vauxhall, it was connected to Trafalgar Dock.
Tirit, also known as trit, is a Turkish dish prepared by soaking broken-up stale bread in a broth prepared from offal, and then seasoned with ground pepper and onion. Some variants add cheese or yogurt.
David Mann was a California graphic artist whose paintings celebrated biker culture, and choppers. Called "the biker world's artist-in-residence," his images are ubiquitous in biker clubhouses and garages, on motorcycle gas tanks, tattoos, and on T-shirts and other memorabilia associated with biker culture. Choppers have been built based on the bikes first imagined in a David Mann painting.
Xming is an X11 display server for Microsoft Windows operating systems, including Windows XP and later.
A viewport is a polygon viewing region in computer graphics.
Arc mapping is a technique used in fire investigation that relies on finding the locations of electrical arcs and other electrical faults that occurred during a fire; the locations of the electrical faults can then, under some circumstances, indicate the progression of the fire over time. It is usually performed by a forensic electrical engineer. It The technique relies on the assumption that, when heat from fire impinges on an electrical line, it will melt the wire insulation and cause an electrical fault at the first point that it reaches on the electrical line. For this to occur, the electrical line must be energized at the time that fire hits it.
A thermal imaging camera is a type of the thermographic camera used in firefighting. By rendering infrared radiation as visible light, such cameras allow firefighters to see areas of heat through smoke, darkness, or heat-permeable barriers. Thermal imaging cameras are typically handheld, but may be helmet-mounted. They are constructed using heat- and water-resistant housings, and ruggedized to withstand the hazards of fireground operations.
A hose strap is a piece of firefighting equipment. It can be "a short length of rope with an eye loop at one end and a metal hook at the other" or a piece of "flat nylon webbing sewn into a four-foot loop". Such a tool is routinely carried by firefighters in their structural turnout gear as a standard piece of personal equipment. While the variety with a metal hook may be more versatile, the nylon loop weighs less, is less expensive, and can be safely carried in a pocket. The hose strap has been a firefighting tool in common use since at least 1918, and appears as early as 1898 in an inventory list of Seattle, Washington municipal firefighting equipment.
Orthostatic vital signs are a series of vital signs of a patient taken while the patient is supine, then again while standing. The results are only meaningful if performed in the correct order. Used to identify orthostatic hypotension, orthostatic vital signs are commonly taken in triage medicine when a patient presents with vomiting, diarrhea or abdominal pain; with fever; with bleeding; or with syncope, dizziness or weakness. Orthostatic vital signs are not collected where spinal injury seems likely or where the patient is displaying an altered level of consciousness. Additionally, it is omitted when the patient is demonstrating hemodynamic instability, which term is generally used to indicate abnormal or unstable blood pressure but which can also suggest inadequate arterial supply to organs. Orthostatic vital signs are also taken after surgery.
The clothing worn by plague doctors was intended to protect them from airborne diseases during outbreaks of bubonic plague in Europe. It is often seen as a symbol of death and disease. However, the costume was mostly worn by late Renaissance and early modern physicians studying and treating plague patients.
The Gryazev-Shipunov GSh-30-1 is a 30 mm autocannon designed for use on Soviet and later Russian military aircraft, entering service in the early 1980s. Its current manufacturer is the Russian company JSC Izhmash. The name GSH-30-1 is formed from the surnames of the designers Gryazev (Грязев) and Shipunov (Шипунов), the caliber of 30 mm and the single-barrel design of the gun itself.
Vomiting agents are chemical weapon agents causing vomiting. Prolonged exposure can be lethal. They were used for the first time during WWI.
