Experimental and mathematical survey of sound absorption performance of date palm fibers
Heliyon, 2019 The present study examines the acoustic behavior sample composites made of date palm natural fibers and polyvinyl alcohol. It also provides the comparison between the sound absorption coefficients obtained from the experimental tests and the ones ...
Ebrahim Taban +4 more
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Study of the damping characteristics of general aviation aircraft panels and development of computer programs to calculate the effectiveness of interior noise control treatment, part 1 [PDF]
Tests were carried out on 20 inch x 20 inch panels at different test conditions using free-free panels, clamped panels, and panels as installed in the KU-FRL acoustic test facility. Tests with free-free panels verified the basic equipment set-up and test
Hunt, J., Navaneethan, R., Quayle, B.
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Carbon‐Coated Moth‐Eye Structure: An Ultrabroadband THz‐DUV Near‐Perfect Absorber
Advanced Optical Materials, EarlyView.A silicon moth‐eye surface coated with pyrolytic carbon achieves >98% absorption from 1 to 1200 THz by combining gradient‐index matching with PyC's broadband conductivity, forming an ultra‐broadband absorber from THz to deep UV. Experimental results and simulations agreed well.
Yuki Hakamada +18 more
wiley +1 more source
Comparison between design and installed acoustic characteristics of NASA Lewis 9- by 15-foot low-speed wind tunnel acoustic treatment [PDF]
The test section of the NASA Lewis 9- by 15-Foot Low-Speed Wind Tunnel was acoustically treated to allow the measurement of sound under simulated free-field conditions.
Dahl, Milo D., Woodward, Richard P.
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A Linear Dynamic Analysis of Vent Condensation Stability [PDF]
, 1980 Pressure suppression systems in boiling water reactors are designed to condense a large amount of steam very rapidly by injecting it into a pool of water.
Brennen, C.
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Optical Chaos Generation and Applications
Advanced Photonics Research, EarlyView.This review comprehensively examines optical chaos generation via feedback, injection, and optoelectronic methods, emphasizing bandwidth enhancement and time‐delay suppression. Applications include chaos‐synchronized secure communication, physical random number generation, chaotic lidar for cm‐level detection, distributed fiber sensing, and terahertz ...
Wenhui Chen +8 more
wiley +1 more source
An experimental study of the effects of water repellant treatment on the acoustic properties of Kevlar [PDF]
The treatment consisted of immersing samples of Kevlar in a solution of distilled water and Zepel. The samples were then drained, dried in a circulating over, and cured.
Parrott, T. L., Smith, C. D.
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Ammonia Dynamics in the Human Body: Insights in Biomedical Sensing Technologies
Advanced Sensor Research, EarlyView.Ammonia (NH3) is a significant biomarker in diagnostics, affecting the respiratory system, stomach, liver, kidneys, bladder, and gastrointestinal tract. NH3 detection, using sensors, has the potential to improve medical diagnosis. This review examines recent advancements in NH3 sensing technologies and explores future research directions, including ...
Annelot Nijkoops +8 more
wiley +1 more source
RUDN Journal of Medicine, 2011 We have examined 72 patients aged from 18 till 62 with cerebral and cerebrospinal multiple sclerosis (MS) form. All patients have been underwent оtoneurologiс examination, electronystagmography (ENG), caloric tests, pure-tone audiometry, high frequency ...
I M Kirichenko +5 more
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Applied SciencesExtracting the microscopic parameters of a porous material is a complex task, and attempts have been made to develop models that can simulate their characteristics, gathering the least amount of information possible. As a case in point, tests to evaluate
P. C. Iglesias, L. Godinho, J. Redondo
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