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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 ...
ISBN. 0806106514. The Wire that Fenced the West is a book written by Henry D. and Frances T. McCallum and published in 1965 by the University of Oklahoma Press . The book covers the history of the development of barbed wire and the inventors. It also include chapters of how it was marketed and the history of its use in the American West.
The area was very difficult to approach and heavily fortified. In the 1950s and 1960s, a double barbed-wire fence was installed 50 metres (160 ft) from the border. The space between the two fences was laden with land mines. The minefield was later replaced with an electric signal fence (about 1 kilometre (0.62 mi) from the border) and a barbed ...
Walras's law is a principle in general equilibrium theory asserting that budget constraints imply that the values of excess demand (or, conversely, excess market supplies) must sum to zero regardless of whether the prices are general equilibrium prices. That is: where is the price of good j and and are the demand and supply respectively of good j.
Merit order. The merit order is a way of ranking available sources of energy, especially electrical generation, based on ascending order of price (which may reflect the order of their short-run marginal costs of production) and sometimes pollution, together with amount of energy that will be generated. In a centralized management, the ranking ...
Law of supply. The law of supply is a fundamental principle of economic theory which states that, keeping other factors constant, an increase in sales price results in an increase in quantity supplied. [1] In other words, there is a direct relationship between price and quantity: quantities respond in the same direction as price changes.
The outer fences were constructed in a number of phases, starting with the initial fortification of the border from May 1952. The first-generation fence was a crudely constructed single barbed-wire fence (Stacheldrahtzaun) which stood between 1.2 and 2.5 metres (3.9 and 8.2 ft) high and was built very close to the actual border line. [63]
Barbed wire. Barbed wire, also known as barb wire, is a type of steel fencing wire constructed with sharp edges or points arranged at intervals along the strands. Its primary use is the construction of inexpensive fences, and it is also used as a security measure atop walls surrounding property. As a wire obstacle, it is a major feature of the ...