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Duty cycle. The duty cycle is defined as the ratio between the pulse duration, or pulse width ( ) and the period ( ) of a rectangular waveform. Spectrum in relation to duty cycle. A duty cycle or power cycle is the fraction of one period in which a signal or system is active. [1] [2] [3] Duty cycle is commonly expressed as a percentage or a ratio.
Technetium-99m ( 99m Tc) is a metastable nuclear isomer of technetium-99 (itself an isotope of technetium ), symbolized as 99m Tc, that is used in tens of millions of medical diagnostic procedures annually, making it the most commonly used medical radioisotope in the world. Technetium-99m is used as a radioactive tracer and can be detected in ...
In 1996, Simon Plouffe derived an algorithm to extract the n th decimal digit of π (using base 10 math to extract a base 10 digit), and which can do so with an improved speed of O(n 3 (log n) 3) time.
Two digits describing the maximum thickness as percent of chord. For example, the NACA 712A315 has the area of minimum pressure 10% of the chord back on the upper surface and 20% of the chord back on the lower surface, uses the standard "A" profile, has a lift coefficient of 0.3, and has a maximum thickness of 15% of the chord.
Formally, p is the number of generators; relationships that determine the intentionally confounded effects that reduce the number of runs needed. Each generator halves the number of runs required. A design with p such generators is a 1/(l p)=l −p fraction of the full factorial design.
The CW generator is on the right, the particle source is on the left. The Cockcroft–Walton ( CW) generator, or multiplier, is an electric circuit that generates a high DC voltage from a low-voltage AC or pulsing DC input. It was named after the British and Irish physicists John Douglas Cockcroft and Ernest Thomas Sinton Walton, who in 1932 ...
Plutonium-240 undergoes spontaneous fission at a small but significant rate (5.8 × 10 −6 %). The presence of 240 Pu limits the plutonium's use in a nuclear bomb , because a neutron from spontaneous fission starts the chain reaction prematurely, causing an early release of energy that disperses the core before full implosion is reached.
Stern–Brocot tree. In number theory, the Stern–Brocot tree is an infinite complete binary tree in which the vertices correspond one-for-one to the positive rational numbers, whose values are ordered from the left to the right as in a search tree . The Stern–Brocot tree was introduced independently by Moritz Stern ( 1858) and Achille ...