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MAC is used to compare the strengths, or potency, of anaesthetic vapours. [1] The concept of MAC was first introduced in 1965. [2] MAC actually is a median value, not a minimum as term implies. The original paper proposed MAC as the minimal alveolar concentration, [3] which was shortly thereafter revised to minimum alveolar concentration. [4]
The MAC operation modifies an accumulator a: + () When done with floating-point numbers, it might be performed with two roundings (typical in many DSPs ), or with a single rounding. When performed with a single rounding, it is called a fused multiply–add ( FMA ) or fused multiply–accumulate ( FMAC ).
The message and the MAC tag are then sent to the receiver. The receiver in turn runs the message portion of the transmission through the same MAC algorithm using the same key, producing a second MAC data tag. The receiver then compares the first MAC tag received in the transmission to the second generated MAC tag.
In larger aircraft, weight and balance is often expressed as a percentage of mean aerodynamic chord, or MAC. For example, assume the leading edge of the MAC is 62 inches aft of the datum. Therefore, the CG calculated above lies 32 inches aft of the leading edge of the MAC. If the MAC is 80 inches in length, the percentage of MAC is 32 / 80 = 40%.
Mean aerodynamic chord (MAC) is defined as: [6] = (), where y is the coordinate along the wing span and c is the chord at the coordinate y.Other terms are as for SMC. The MAC is a two-dimensional representation of the whole wing. The pressure distribution over the entire wing can be reduced to a single lift force
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Minimum alveolar concentration (MAC) is defined as the alveolar concentration of anesthetic gas that prevents a movement response in half of subjects undergoing a painful (surgical) stimulus; simplified, it is the exhaled gas concentration required to produce anaesthetic effects – an inverse indicator of anesthetic gas potency.
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