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An electric fence is a barrier that uses electric shocks to deter people and other animals [ note 1] from crossing a boundary. The voltage of the shock may have effects ranging from discomfort to death. Most electric fences are used for agricultural fencing and other forms of non-human animal control, although they are also used to protect high ...
A sliding electric gate with electric motor and backup battery in case of mains failure. Note also the Infrared obstacle sensor located on the wall to prevent the gate from closing while a vehicle or other obstacle is in the way. Driveway gate openers can be the rollback (sliding) type that retracks a gate along the fence or wall on wheels or ...
Cointet-element at Collevill-sur-Mer. The Cointet-element, also known as a Belgian Gate or C-element, was a heavy steel fence about three metres (9 ft 10 in) wide and two metres (6 ft 7 in) high, typically mounted on concrete rollers, used as a mobile anti-tank obstacle during World War II. [ 1] Each individual fence element weighed about 1,280 ...
In June, Murthy released his most politically charged report yet, declaring that gun deaths and injuries in America had reached such critical mass that they have created a public health crisis.
Equipped with only 19 pounds of gear, 89-year-old Bing Olbum set off on what he intended to be a five-day hiking trip.. Instead, Olbum found himself stranded for nearly 10 days in over 4 million ...
The 249-year-old musket balls were discovered by archeologists doing "compliance activities" in preparation for an event, the National Park Service said in a news release Tuesday. Early analysis ...
The Fredkin gate (also controlled-SWAP gate and conservative logic gate) is a computational circuit suitable for reversible computing, invented by Edward Fredkin. It is universal, which means that any logical or arithmetic operation can be constructed entirely of Fredkin gates. The Fredkin gate is a circuit or device with three inputs and three ...
RALPH D. RUSSO. August 1, 2024 at 8:06 PM. College sports leaders believe they have found a way through a massive antitrust settlement to finally separate “true NIL" for athletes from booster ...