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Bar gates, especially manually operated ones, are often counterweighted to allow easier manual control. [7] Bar gates are frequently paired end to end or closely offset to block traffic in both directions. Some bar gates also have a second arm which hangs 30 to 40 cm below the upper arm when lowered to increase approach visibility.
Many people consider four-quadrant gates to be safer than two-quadrant gates because they prevent drivers from illegally and dangerously driving their vehicles around lowered gates, in an attempt to pass before the train does. However, these gates are only safer if there is a way of ensuring that the crossing is clear before clearing the train ...
Yett hanging in the main entrance of Blackness Castle, Scotland, showing attached bolts and pierced construction.Wrought in 1693. [1]A yett (from the Old English and Scots language word for "gate") [2] is a gate or grille of latticed wrought iron bars used for defensive purposes in castles and tower houses. [3]
The Watergate complex in Washington, D.C., the inspiration for the -gate suffix following the Watergate scandal. This is a list of scandals or controversies whose names include a -gate suffix, by analogy with the Watergate scandal, as well as other incidents to which the suffix has (often facetiously) been applied. [1]
“If you want to understand the rise of AI, this is the best book to read,” Gates recommends. (For those readers still hungry, Fortune ...
This test is typically referred to as the "patent bar", although the word "bar" does not appear in the test's official name. Unlike the general bar examination, for which graduation from a recognized law school is a prerequisite, the USPTO exam does not require that the candidate have taken any law school courses.
Depending on the voltages sent down the various lines, it can simulate the action of the three major logic gates: AND, OR and NOT. The abstract of the patent is as follows: "A molecular crossbar latch is provided, comprising two control wires and a signal wire that crosses the two control wires at a non-zero angle to thereby form a junction ...
A NOT gate, for example, can be constructed from a Toffoli gate by setting the three input bits to {a, 1, 1}, making the third output bit (1 XOR (a AND 1)) = NOT a; (a AND b) is the third output bit from {a, b, 0}. Essentially, this means that one can use Toffoli gates to build systems that will perform any desired Boolean function computation ...