# Every filter on X has a convergent refinement.

1-channel protein domain | domain s ( typically four per channel ), 2-outer vestibule, 3-Potassium channel # Selectivity filter | selectivity filter, 4-diameter of selectivity filter, 5-phosphorylation site, 6-cell membrane.

# A filter is proper if it is not equal to the whole set P. This is sometimes omitted from the definition of a filter.

# Anti-Communism: This was included as a filter in the original 1988 edition of the book, but Chomsky argues that since the end of the Cold War ( 1945 – 91 ), anticommunism was replaced by the " War on Terror ", as the major social control mechanism.

# Equalization filtering, for example a matched filter, compensation for multipath propagation, time spreading, phase distortion and frequency selective fading, to avoid intersymbol interference and symbol distortion.

Small sections of very dark filter glass, such as a # 14 welder's glass are effective.

# We then pass the sound through a shallow low-pass filter:

# In this case, to better emulate the sound of a plucked string, we want the filter cutoff frequency to start in the mid-range and move low.

# Introduce an anti-aliasing filter or make the anti-aliasing filter more stringent.

# A high-pass filter ( green trace ) will distort the shape of a square wave by reducing its low frequency components.

# A low-pass filter ( blue trace ) will round the pulses by removing the high frequency components.

# The output of the delay line is fed through a filter.

# Prepotency of elements-a subject can filter out irrelevant aspects of a problem and focus and respond only to significant elements of a problem.

# Perform a " filter " operation on the current heap to establish the heap property:

# redirect filter

# Screening ( see also screen filter ) – The first step in purifying surface water is to remove large debris such as sticks, leaves, rubbish and other large particles which may interfere with subsequent purification steps.

# Make every program a filter.

# REDIRECT Band-pass filter

# REDIRECT Kalman filter

# redirect filter feeder