If the temperature is below setpoint, the output will be on longer; if the temperature is too high, the output will be off longer. The third controller type provides proportional with integral and derivative control, or PID.
Noise figure. Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio-frequency (RF) signal chain. It is a number by which the performance of an amplifier or a radio receiver can be specified, with lower values indicating better performance.
Figure-Ground Perception. Figure-ground perception is the ability to focus on one specific piece of information in a busy background. Visual figure-ground is the ability to see an object in a busy background; while auditory figure-ground helps a child pick out a voice or sound from a noisy environment. This article deals with the visual perceptual skill and offers some activity ideas to inspire parents and teachers!