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  2. Detonator (railway) - Wikipedia

    en.wikipedia.org/wiki/Detonator_(railway)

    There are three types of detonator protection in the UK: Emergency Protection: Engineering staff working inside a possession, seen from a train passing on an active running line. If a train is involved in an accident or fails and it is not possible to contact the signaller, then emergency protection must be used. Track circuit operating clips ...

  3. Why did Dallas-Fort Worth get so much fog this morning ... - AOL

    www.aol.com/why-did-dallas-fort-worth-151850029.html

    The National Weather Service warns drivers to slow down while driving in foggy conditions.

  4. Amazon Fire TV - Wikipedia

    en.wikipedia.org/wiki/Amazon_Fire_TV

    The other product is a HDMI plug-in stick with, in general, lesser specifications than the contemporaneous boxes; [12] these are offered in the entry-level Fire TV Stick Lite, the standard Fire TV Stick, and the high-end Fire TV Stick 4K and Fire TV Stick 4K Max (the third of which effectively replaced the third-generation "pendant" Fire TV [17 ...

  5. Theatrical smoke and fog - Wikipedia

    en.wikipedia.org/wiki/Theatrical_smoke_and_fog

    Theatrical smoke and fog, also known as special effect smoke, fog or haze, is a category of atmospheric effects used in the entertainment industry.The use of fogs can be found throughout motion picture and television productions, live theatre, concerts, at nightclubs and raves, amusement and theme parks and even in video arcades and similar venues.

  6. When will widespread fog go away in central, eastern US? - AOL

    www.aol.com/weather/widespread-fog-away-central...

    Fog is considered dense when the visibility is 1/4 of a mile or less. Nationwide, there were more than 1,100 weather-related flight delays on Thursday morning, according to FlightAware.com. On ...

  7. Level crossings in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Level_crossings_in_the...

    Modern alarms have night modes (controlled by the crossing relays) that lower the volume in the night, the pitch usually goes lower and the alternate rate normally goes faster (depending on which yodalarm model it is), on some crossings (mainly of the older types) the alarms are switched off completely by the crossing controller at night.

  8. Fog nozzle - Wikipedia

    en.wikipedia.org/wiki/Fog_nozzle

    A fog nozzle. A fog nozzle is a firefighting hose spray nozzle that breaks its stream into small droplets.By doing so, its stream achieves a greater surface area, and thus a greater rate of heat absorption, which, when compared to that of a smoothbore nozzle, speeds its transformation into the steam that smothers the fire by displacing its oxygen.

  9. Tule fog - Wikipedia

    en.wikipedia.org/wiki/Tule_fog

    Tule fog is a radiation fog, which condenses when there is a high relative humidity (typically after a heavy rain), calm winds, and rapid cooling during the night. The nights are longer in the winter months, which allows an extended period of ground cooling, and thereby a pronounced temperature inversion at a low altitude.