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A stile is a structure or opening that provides passage for humans – rather than animals such as livestock – over or through a boundary. Common forms include steps, ladders, or narrow gaps. [1] Stiles are often built in rural areas along footpaths, fences, walls, or hedges that enclose domestic animals. [2]
A net with a rectangular mesh, supported by static posts, placed on top a rockfall protection embankment. (Gothard pass, Switwerland) When the rock block kinetic energy is less than 500 kJ, a static barrier is often adapted. In general, it consists of static posts, cables and an interception net.
A border barrier, border fence or border wall is a separation barrier that runs along or near an international border. Such barriers are typically constructed for border control purposes such as curbing illegal immigration , human trafficking , and smuggling .
In a virtual electric fence system, each animal has a collar with a GPS unit which is set to produce first an audible warning and then a shock as the animal approaches a programmable boundary. Pet fences to control domestic dogs have been used since 1973, and the first system for livestock control was developed by Peck's Invisible Fence Co, now ...
The "Sabre dance" (which caused many F-100 Super Sabres to crash) is a notable example of this behavior. Wing fences delay, or eliminate, these effects by preventing the spanwise flow from moving too far along the wing and gaining speed. When meeting the fence, the air is directed back over the wing surface.
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In the context of a perimeter fence, [10] MEMS sensors can be attached to the fenced area. These sensors could detect changes in pressure or vibration caused by someone attempting to climb over or cut through the fence. The sensors then transmit an alert to a security system, allowing security personnel to respond quickly to the attempted breach.
The Iraq–Kuwait barrier (Arabic: حدود العراق-الكويت Hudud al-'Irāq-al-Kuwayt) is a 120-mile (190 km) border fence extending six miles (9.7 km) into Iraq, three miles (4.8 km) into Kuwait, and across the full length of their mutual border from Saudi Arabia to the Persian Gulf.