You should see to it that the trap, the dirt-catcher in front of the filter, is always clean.

Their job is to filter the blood of metabolic waste and transport the urine via ureters to the urinary bladder where it is stored before being passed out periodically through the cloacal vent.

The former is equivalent in ZF to the existence of an ultrafilter containing each given filter, proved by Tarski in 1930.

A chemical anisotropic filter, as used to filter particles, is a filter with increasingly smaller interstitial spaces in the direction of filtration so that the proximal regions filter out larger particles and distal regions increasingly remove smaller pales, resulting in greater flow-through and more efficient filtration.

The analog output is connected to a low-pass filter, which filters out high-frequency aliases when the Amiga is using a lower sampling rate ( see Nyquist limit ).

The brightness of the Amiga's power LED is used to indicate the status of the Amiga's low-pass filter.

The filter is active when the LED is at normal brightness, and deactivated when dimmed ( or off on older A500 Amigas ).

* phaser-another way of creating an unusual sound ; the signal is split, a portion is filtered with an all-pass filter to produce a phase-shift, and then the unfiltered and filtered signals are mixed.

The fiber was originally used for making twines and ropes ; now most abacá is pulped and used in a variety of specialized paper products including tea bags, filter paper and banknotes.

Passband bandwidth is the difference between the upper and lower cutoff frequencies of, for example, an bandpass filter, a communication channel, or a signal spectrum.

In case of a low-pass filter or baseband signal, the bandwidth is equal to its upper cutoff frequency.

The 3 dB bandwidth of an electronic filter or communication channel is the part of the system's frequency response that lies within 3 dB of the response at its peak, which in the passband filter case is typically at or near its center frequency, and in the lowpass filter is near 0 hertz.

This higher-order function is typically named filter in functional programming languages.

It is named after Melitta Bentz ( 1873 – 1950 ) who founded the company after she invented the drip brew paper coffee filter ( German patent granted July 8, 1908 ).

A 4th order crossover with − 6 dB crossover point and flat summing is also known as a Linkwitz-Riley crossover ( named after its inventors ), and can be constructed in active form by cascading two 2nd order Butterworth filter sections.

The filter is named for Rudolf ( Rudy ) E. Kálmán, one of the primary developers of its theory.

In contrast to the naming convention of optical filters where the name of the filter denotes the wavelengths that are blocked, and in line with the convention for air filters and oil filters, photographic filters are named for the color of light they pass.

SpamAssassin was created by Justin Mason who had maintained a number of patches against an earlier program named filter. plx by Mark Jeftovic, which in turn was begun in August 1997.

On July 8, 1908, the first paper coffee filter was created by German housewife named Melitta Bentz.

This type of filter is named in honor of Pafnuty Chebyshev because its mathematical characteristics are derived from Chebyshev polynomials.

A Frenchman named Lucien Levy was investigating ways in which receiver selectivity could be improved and in doing this he devised a system whereby the signals were converted down to a lower frequency where the filter bandwidths could be made narrower.

( Most spectral manipulation filters are named for the radiation they pass ; green and infrared filters pass their named colors, but a UV filter blocks UV.

In image processing, a Gabor filter, named after Dennis Gabor, is a linear filter used for edge detection.

The Fréchet filter is named after the French mathematician Maurice Fréchet ( 1878-1973 ), who worked in topology.

An elliptic filter ( also known as a Cauer filter, named after Wilhelm Cauer ) is a signal processing filter with equalized ripple ( equiripple ) behavior in both the passband and the stopband.

The filter is named after Cornelius Lanczos ,< ref >

If we wish to implement this filter as a digital filter, we can apply the bilinear transform by substituting for the formula above ; after some reworking, we get the following filter representation:

In May 2010, the Washington State Supreme Court provided an opinion after it was asked to certify a question referred by the United States District Court for the Eastern District of Washington: “ Whether a public library, consistent with Article I, § 5 of the Washington Constitution, may filter Internet access for all patrons without disabling Web sites containing constitutionally-protected speech upon the request of an adult library patron .” The Washington State Supreme Court ruled that NCRL ’ s internet filtering policy did not violate Article I, Section 5 of the Washington State Constitution.

Although a digital filter can be an IIR filter if the algorithm implementing it includes feedback, it is also possible to easily implement a filter whose impulse truly goes to zero after N time steps ; this is called a finite impulse response ( FIR ) filter.

In models after the Amiga 1000, the brightness of the power LED is used to indicate the status of the filter.

Native Instrument's flagship softsynth Massive also contains a filter modelled after that of the TB-303, allowing users to create their own realistic-sounding acid patches.

Microprocessor technology allows replacing the superheterodyne receiver design by a software defined radio architecture, where the IF processing after the initial IF filter is implemented in software.

A shaping filter is sometimes used after the DAC with zero-order hold to make a better overall approximation.

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.

In this case, the insertion loss is positive and measures how much smaller the signal is after adding the filter.

Fan-bypass uprights have their motor mounted after the filter bag.

This version, after the mid-1970s, saw little change with the incorporation of electronic ignition in 1988, an anti-theft alarm system in 1990, a catalytic converter in 1991 ( as required by law ), as well as electronic Digifant fuel injection, hydraulic valve lifters, and a spin-on oil filter in 1993.

By comparison, MP3 is a transform audio encoder with hybrid filter bank, which means that compression takes place in the frequency domain after a hybrid ( double ) transformation from the time domain.

In 1892, Dmitri Ivanovsky gave the first concrete evidence for the existence of a non-bacterial infectious agent, showing that infected sap remained infectious even after filtering through finest Chamberland filter candles.

' There was an additional engine filter to prevent damage from sand which caused a loss in power, a common occurrence in North Africa, since filter-less engines could be damaged after only a few hours use.

For example, the spam filter would make a " guess " after each line or after every x bytes received as to how likely this message is going to be spam.