Low-frequency, bottom-interacting pulse propagation in range-dependent oceans

1988 ◽  
Vol 13 (4) ◽  
pp. 222-228 ◽  
Author(s):  
M.D. Collins
Keyword(s):  
Pulse Propagation ◽  
Low Frequency

Low-frequency pulse propagation over 510 km in the Philippine Sea: A comparison of observed and theoretical pulse spreading

2016 ◽  
Vol 140 (1) ◽  
pp. 216-228 ◽  
Author(s):  
Rex K. Andrew ◽  
Andrew Ganse ◽  
Andrew W. White ◽  
James A. Mercer ◽  
Matthew A. Dzieciuch ◽  
...  
Keyword(s):  
Pulse Propagation ◽  
Low Frequency ◽  
Philippine Sea ◽  
Frequency Pulse

scholarly journals Group velocity mismatch at ultrashort electromagnetic pulse propagation in nonlinear metamaterials

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 200-205
Author(s):  
Rena J. Kasumova ◽  
Gulnara A. Safarova ◽  
Asmar R. Ahmadova
Keyword(s):  
Pulse Propagation ◽  
Low Frequency ◽  
Signal Wave ◽  
Optical Wave ◽  
Quadratic Phase ◽  
Excited Wave ◽  
Ultrashort Electromagnetic Pulse ◽  
Group Velocity Mismatch ◽  
Velocity Mismatch ◽  
Exciting Wave

Abstract The parametric interaction of optical wave pulses in metamaterials is considered in the first approximation of the theory of dispersion. The interaction between the quasi-monochromatic pump wave and the wave pulse at the total frequency with quadratic phase modulation is assumed. The results of calculation of the shape of the spectrum of an excited signal wave at a difference frequency are presented for low frequency pumping. It is shown that the effects of group mismatch in metamaterials lead to a narrowing of the spectrum of the excited wave. With an increase in the modulation degree of a weak exciting wave, the spectrum of the excited wave broadens.

Low frequency acoustic pulse propagation in temperate forests

2015 ◽  
Vol 138 (2) ◽  
pp. 735-747 ◽  
Author(s):  
Donald G. Albert ◽  
Michelle E. Swearingen ◽  
Frank E. Perron ◽  
David L. Carbee
Keyword(s):  
Pulse Propagation ◽  
Temperate Forests ◽  
Acoustic Pulse ◽  
Low Frequency

A Study on the Fine Structure of the Lateral Line Organ of the Sea Eel

1973 ◽  
Vol 31 ◽  
pp. 648-649
Author(s):  
K. Hama
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Lateral Line ◽  
Low Frequency ◽  
Sensory Cells ◽  
Apical Surface ◽  
Voltage Electron ◽  
Sensory Epithelia ◽  
Low Frequency Vibration ◽  
Transmission Electron

The lateral line organs of the sea eel consist of canal and pit organs which are different in function. The former is a low frequency vibration detector whereas the latter functions as an ion receptor as well as a mechano receptor.The fine structure of the sensory epithelia of both organs were studied by means of ordinary transmission electron microscope, high voltage electron microscope and of surface scanning electron microscope.The sensory cells of the canal organ are polarized in front-caudal direction and those of the pit organ are polarized in dorso-ventral direction. The sensory epithelia of both organs have thinner surface coats compared to the surrounding ordinary epithelial cells, which have very thick fuzzy coatings on the apical surface.

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