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An economic system is a type of social system. The mode of production is a related concept. [2] All economic systems must confront and solve the four fundamental economic problems : What kinds and quantities of goods shall be produced: This fundamental economic problem is anchored on the theory of pricing.
In physics and electrical engineering, the universal dielectric response, or UDR, refers to the observed emergent behaviour of the dielectric properties exhibited by diverse solid state systems. In particular this widely observed response involves power law scaling of dielectric properties with frequency under conditions of alternating current, AC.
Immune system. The immune system is a network of biological systems that protects an organism from diseases. It detects and responds to a wide variety of pathogens, from viruses to parasitic worms, as well as cancer cells and objects such as wood splinters, distinguishing them from the organism's own healthy tissue.
Where s is the s-plane variable, ω is angular frequency and j is the imaginary unit.. Chebyshev filters. Sometimes other ratios are more convenient than the 3 dB point. For instance, in the case of the Chebyshev filter it is usual to define the cutoff frequency as the point after the last peak in the frequency response at which the level has fallen to the design value of the passband ripple.
Greenwood frequency. In adaptive optics, the Greenwood frequency [1] is the frequency or bandwidth required for optimal correction with an adaptive optics system. It depends on the transverse windspeed and the turbulence strength in the atmosphere. This can be easily understood since if the turbulence moves over the telescope opening faster ...
The spatial frequency is a measure of how often sinusoidal components (as determined by the Fourier transform) of the structure repeat per unit of distance. The SI unit of spatial frequency is the reciprocal metre (m −1 ), [1] although cycles per meter (c/m) is also common. In image-processing applications, spatial frequency is often ...
The Dutchess County (DC) Fire and EMS radio system has 16 channels, comprising 9 UHF frequencies, that uses continuous tone coded squelch system ( CTCSS) to eliminate outside interference, and Radio repeater base stations to enhance and extend the mobile communications. The 16 channels are divided into five main categories; Dispatch, Response ...
For a given sampling rate ( samples per second ), the Nyquist frequency ( cycles per second) is the frequency whose cycle-length (or period) is twice the interval between samples, thus 0.5 cycle/sample. For example, audio CDs have a sampling rate of 44100 samples/second. At 0.5 cycle/sample, the corresponding Nyquist frequency is 22050 cycles ...