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Temperature cycling (or temperature cycle) is the process of cycling through two temperature extremes, typically at relatively high rates of change. It is an environmental stress test used in evaluating product reliability as well as in manufacturing to catch early-term, latent defects by inducing failure through thermal fatigue .
Hog panels or cattle panels consist of heavy wire approximately .25 inches (6 mm) or more in diameter running horizontal and vertical, and welded at the intersections. The panels, which are sold in lengths of 16 ft or 8 ft rather than in rolls, are rigid and self-supporting.
Drift fences were used in the Texas Panhandle from 1882 to 1887 to control "cattle drift"—the winter migration of livestock to warmer territory. Long sections of barbed wire fence were built by ranchers to keep the cattle from moving to the southern part of the state.
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Electric heat tracing, heat tape or surface heating, is a system used to maintain or raise the temperature of pipes and vessels using heat tracing cables. Trace heating takes the form of an electrical heating element run in physical contact along the length of a pipe.
Joule immersed a length of wire in a fixed mass of water and measured the temperature rise due to a known current flowing through the wire for a 30 minute period. By varying the current and the length of the wire he deduced that the heat produced was proportional to the square of the current multiplied by the electrical resistance of the ...
Heat is usually most dangerous for the heaviest cattle that weigh more than 1,000 pounds (450 kg), but temperatures and humidity spiked so high that even lighter 700-pound cattle died, Vetter said.
Linear heat detection (LHD) cable is essentially a two-core cable terminated by an end-of-line resistor (resistance varies with application). The two cores are separated by a polymer plastic, that is designed to melt at a specific temperature (commonly 68 °C for building applications [1]), and without which causes the two cores to short.