What are amplifiers and how do they affect the amplitude of a signal?

Upper-tropospheric Rossby wave packets (RWPs) are important dynamical features, because they are often associated with weather systems and sometimes act as ... Nonstationary waves of finite (but small) amplitude propagating in a cold plasma both at an angle with respect to the magnetic field and perpendicular to ... Jan 1, 1975 ... A first approximation to finite amplitude waves of large wavelength is obtained. ... wave solutions given by Korteweg and deVries. ... amplitude while higher frequency waves (alpha, beta) are lower amplitude. ... wave discharge is an example of a biphasic wave. Polyphasic waves cross the ... The wave drift depends on the phase velocity relative to the Eulerian mean flow and peaks at about 1/3 of the transient Eulerian speed at geophysically relevant ... Apr 6, 2015 ... This is the connection between the Lagrangian and Eulerian variation in a small-amplitude wave, neglecting terms of order |ξ|2 and higher. The ... ... wave (R′), or notching in the nadir of the S wave, or the presence of >1 R ... amplitude of the fQRS. Also the location of the fQRS in the QRS complex ... ... wave generator) are always producing a full-amplitude wave. You control the amplitude of that wave with multiplication, using *~ or some other object that ... Finite Amplitude Waves in Plane Poiseuille Flow. Citation. Pugh, Jeffrey David (1988) Finite Amplitude Waves in Plane Poiseuille Flow. Dissertation (Ph.D ... Usually in transverse waves, amplitude is the measurement of the distance between a peak (top of a wave) or trough (valley or bottom) of a wave and the position ...