A very narrow spectral band

1984 ◽  
Vol 36 (1-2) ◽  
pp. 1-14 ◽  
Author(s):  
Edward N. Lorenz
Keyword(s):  
Spectral Band ◽  
Narrow Spectral Band

Establishment of narrow spectral band model parameters database for gas high temperature radiation characteristics

2017 ◽  
Vol 46 (7) ◽  
pp. 704001
Author(s):  
蔡红华 Cai Honghua ◽  
聂万胜 Nie Wansheng ◽  
吴 睿 Wu Rui ◽  
苏凌宇 Su Lingyu ◽  
侯志勇 Hou Zhiyong
Keyword(s):  
High Temperature ◽  
Spectral Band ◽  
Model Parameters ◽  
Band Model ◽  
Radiation Characteristics ◽  
Narrow Spectral Band ◽  
Temperature Radiation

scholarly journals WAVE STATISTICS ALONG THE NORTHERN COAST OF EGYPT

1974 ◽  
Vol 1 (14) ◽  
pp. 5
Author(s):  
M. Manohar ◽  
I.E. Mobarek ◽  
A. Morcos ◽  
H. Rahal
Keyword(s):  
Nile Delta ◽  
Spectral Band ◽  
Northern Coast ◽  
Wave Statistics ◽  
Wave Measurements ◽  
Narrow Spectral Band ◽  
Wave Heights ◽  
Significant Wave Heights ◽  
Nile Delta Coast ◽  
Comprehensive Study

As a forerunner of a comprehensive study of wave and energy climate of the Nile Delta coast covering a period of more than 50 years, wave measurements taken in 3 locations along the coast in the year 1972 were statistically analysed. Shortcut methods based on statistical approach were used to analyse the wave records enabling quicker analysis. Spectral analysis of the wave records indicates narrow spectral band similar to Raleigh distribution. The histograms and frequency distribution curves of significant wave heights, and the relationships between various statistical prarameters such as H , H,,,„, H,,„ and H also max 1/10' 1/3 rms agree closely with Raleigh distribution curves and parameters enabling the use of Raleigh distribution function in subsequent studies. Finally since the wave characteristics and wave energy climates are most important in the analysis of coastline changes, they are drawn from the data obtained from the analysis.

scholarly journals A single sensor based multispectral imaging camera using a narrow spectral band color mosaic integrated on the monochrome CMOS image sensor

APL Photonics ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 046104 ◽  
Author(s):  
Xin He ◽  
Yajing Liu ◽  
Kumar Ganesan ◽  
Arman Ahnood ◽  
Paul Beckett ◽  
...  
Keyword(s):  
Multispectral Imaging ◽  
Spectral Band ◽  
Cmos Image Sensor ◽  
Image Sensor ◽  
Narrow Spectral Band ◽  
Imaging Camera ◽  
Single Sensor

scholarly journals What ears do for bats: a comparative study of pinna sound pressure transformation in chiroptera

1993 ◽  
Vol 180 (1) ◽  
pp. 119-152 ◽  
Author(s):  
M. K. Obrist ◽  
M. B. Fenton ◽  
J. L. Eger ◽  
P. A. Schlegel
Keyword(s):  
Sound Pressure ◽  
Narrow Band ◽  
Spectral Component ◽  
Spectral Band ◽  
Acoustic Properties ◽  
Echolocation Calls ◽  
Pteronotus Parnellii ◽  
Narrow Spectral Band ◽  
Passive Acoustic ◽  
High Sound

Using a moveable loudspeaker and an implanted microphone, we studied the sound pressure transformation of the external ears of 47 species of bats from 13 families. We compared pinna gain, directionality of hearing and interaural intensity differences (IID) in echolocating and non-echolocating bats, in species using different echolocation strategies and in species that depend upon prey-generated sounds to locate their targets. In the Pteropodidae, two echolocating species had slightly higher directionality than a non-echolocating species. The ears of phyllostomid and vespertilionid species showed moderate directionality. In the Mormoopidae, the ear directionality of Pteronotus parnellii clearly matched the dominant spectral component of its echolocation calls, unlike the situation in three other species. Species in the Emballonuridae, Molossidae, Rhinopomatidae and two vespertilionids that use narrow-band search-phase echolocation calls showed increasingly sharp tuning of the pinna to the main frequency of their signals. Similar tuning was most evident in Hipposideridae and Rhinolophidae, species specialized for flutter detection via Doppler-shifted echoes of high-duty-cycle narrow-band signals. The large pinnae of bats that use prey-generated sounds to find their targets supply high sound pressure gain at lower frequencies. Increasing domination of a narrow spectral band in echolocation is reflected in the passive acoustic properties of the external ears (sharper directionality). The importance of IIDs for lateralization and horizontal localization is discussed by comparing the behavioural directional performance of bats with their bioacoustical features.

scholarly journals Inflationary Magnetogenesis with Helical Coupling

2019 ◽  
Vol 64 (11) ◽  
pp. 1009 ◽  
Author(s):  
Yu. V. Shtanov ◽  
M. V. Pavliuk
Keyword(s):  
Charged Particle ◽  
Magnetic Fields ◽  
Spectral Band ◽  
Model Parameters ◽  
Narrow Spectral Band ◽  
The Creation ◽  
Schwinger Effect ◽  
Additional Constraints

We describe a simple scenario of inflationary magnetogenesis based on a helical coupling to electromagnetism. It allows the generation of helical magnetic fields with strength of order up to 10−7 Gs, when extrapolated to the current epoch, in a narrow spectral band centered at any physical wavenumber after the adjustment of model parameters. The additional constraints on magnetic fields arise from the considerations of baryogenesis and, possibly, from the Schwinger effect of the creation of charged particle-antiparticle pairs.

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