Design of a Broad-band Circular Waveguide TE°21 Mode Generator for Cold Test of Gyro-TWT

2019 ◽  
Author(s):  
Yong Xu ◽  
Hao Li ◽  
Tinghui Peng ◽  
Miao Sun ◽  
Yong Luo ◽  
...  
Keyword(s):  
Broad Band ◽  
Circular Waveguide ◽  
Cold Test

Broad-band measurements of dielectric permittivity in coaxial line using partially filled circular waveguide

2020 ◽  
Vol 91 (3) ◽  
pp. 035106 ◽  
Author(s):  
Šarūnas Svirskas ◽  
Džiugas Jablonskas ◽  
Saulius Rudys ◽  
Saulius Lapinskas ◽  
Robertas Grigalaitis ◽  
...  
Keyword(s):  
Dielectric Permittivity ◽  
Broad Band ◽  
Circular Waveguide ◽  
Coaxial Line

Chronic Laser Exposure Effects on Rabbit Retina

1972 ◽  
Vol 30 ◽  
pp. 54-55
Author(s):  
Burton B. Silver ◽  
Theodore Lawwill
Keyword(s):  
Laser Irradiation ◽  
Laser Light ◽  
Broad Band ◽  
Argon Laser ◽  
Atropine Sulfate ◽  
Ultrastructural Changes ◽  
Laser Exposure ◽  
Rabbit Retina ◽  
Histological Changes ◽  
Threshold Doses

Dutch-belted 1 to 2.5 kg anesthetized rabbits were exposed to either xenon or argon laser light administered in a broad band, designed to cover large areas of the retina. For laser exposure, the pupil was dilated with atropine sulfate 1% and pheny lephrine 10%. All of the laser generated power was within a band centered at 5145.0 Anstroms. Established threshold for 4 hour exposures to laser irradiation are in the order of 25-35 microwatts/cm2. Animals examined for ultrastructural changes received 4 hour threshold doses. These animals exhibited ERG, opthalmascopic, and histological changes consistent with threshold damage.One month following exposure the rabbits were killed with pentobarbitol. The eyes were immediately enucleated and dissected while bathed in 3% phosphate buffered gluteraldehyde.

Real-ear Masking Calibration for Portable Pure-Tone Audiometers

1984 ◽  
Vol 15 (4) ◽  
pp. 289-294
Author(s):  
Martin S. Robinette ◽  
Robert H. Brey
Keyword(s):  
Pure Tone ◽  
Broad Band ◽  
Resistive Network ◽  
Many Instruments

A transformer mixing network is described which allows the calibration of broad-band masking for portable audiometers that lack a built-in mixing network. For many instruments the transformer network is preferable to the resistive network previously published.

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