Results 41 to 50 of about 5,202,506 (244)

A new simple method for determining the sound absorption coefficient

MATEC Web of Conferences, 2018
Taking into account the influence of the length and diameter of the impedance tube on the process of decay of sound waves, a new study of sound propagation in an impedance tube is presented, on the basis of which it is easier to determine the sound ...
Chelidze Merab
doaj   +1 more source

THE PERMEABILITY OF THE SCLERAL TISSUE FOR ULTRAVIOLET A IN THE EXPERIMENT

Oftalʹmologiâ, 2017
Purpose: to evaluate the permeability of the scleral tissue for ultraviolet A (UVA).Materials and Methods. The study was conducted on 15 cadaver porcine eyes. Rectangular scleral flap 12*15 mm was cut out from each eyeball.
M. M. Bikbov, V. K. Surkova, E. L. Usubov, S. V. Kharitonov, A. B. Simonov, M. N. Astrelin   +5 more
doaj   +1 more source

Performance analysis of a direct-absorption parabolic trough solar collector

, 2018
A parabolic trough solar collector is a dominant technology for high-temperature industrial applications, but efficient use of a conventional surface-based parabolic trough solar collector (SBPTSC) is limited by its high radiation loss due to the high ...
Kim, Joong Bae, Lee, Bong Jae, Qin, Caiyan   +2 more
core   +1 more source

Integrating cavity based gas cells: a multibeam compensation scheme for pathlength variation [PDF]

, 2016
We present a four beam ratiometric setup for an integrating sphere based gas cell, which can correct for changes in pathlength due to sphere wall contamination.
Bergin, S., Francis, Daniel, Hodgkinson, Jane, Tatam, Ralph P.   +3 more
core   +2 more sources

Influence of Annealing on the Optical and Scintillation Properties of CaWO$_4$ Single Crystals

, 2012
We investigate the influence of oxygen annealing on the room temperature optical and scintillation properties of CaWO$_4$ single crystals that are being produced for direct Dark Matter search experiments.
A. Erb, A. Gütlein, A. Münster, A. Zöller, Allison, America, Angloher, Bavykina, C. Ciemniak, Carrier, Cockayne, Cockayne, Diemoz, Edison, F.v. Feilitzsch, J. Lepelmeier, J.-C. Lanfranchi, Kesavamoorthy, Kraus, Levin, Levinstein, Lewin, M. Willers, M.v. Sivers, Mikhailik, Mikhailik, Nassau, Nieto-Vesperinas, Nikl, Nikl, Nikl, Ninkovic, Oeder, R. Strauss, S. Roth, S. Wawoczny, Shao, Shappirio, Strul, U. Thalhammer, W. Potzel, Wahl, Yakovyna, Yakovyna, Zhu   +44 more
core   +1 more source

Mass Transfer in a closed stirred gas/liquid contactor: Part 2: The liquid phase mass transfer coefficient kL [PDF]

, 1972
The liquid phase mass transfer coefficient kL for the absorption of oxygen in tap water and in ionic solutions has been calculated from the quotien\ud \ud It is concluded that the liquid phase mass transfer coefficient is roughly proportional to the ...
Koetsier, W.T., Thoenes, D.
core   +3 more sources

Modelling of Stochastic Absorption in a Random Medium [PDF]

, 2000
We report a detailed and systematic study of wave propagation through a stochastic absorbing random medium. Stochastic absorption is modeled by introducing an attenuation constant per unit length $\alpha$ in the free propagation region of the one ...
Jayannavar, A. M., Joshi, Sandeep K., Sahoo, Debendranath   +2 more
core   +2 more sources

On-demand prediction of low-frequency average sound absorption coefficient of underwater coating using machine learning

Results in Engineering
This study proposes an underwater coating with sound absorption ability in the middle-to-low frequency range and establishes an acoustic theoretical model combining the equivalent medium theory and the transfer matrix method.
Nansha Gao, Mou Wang, Xiao Liang, Guang Pan   +3 more
doaj   +1 more source

Formula for the Absorption Coefficient for Multi-Wall Nanotubes

, 2010
We present a formalism for calculating the absorption coefficient of a pair of coaxial tubules. A spatially nonlocal, dynamical self-consistent field theory is obtained by calculating the electrostatic potential produced by the charge density ...
Antonios Balassis, Arista, Arista, Arista, Balassis, Callaway, Chiu, Godfrey Gumbs, Gumbs, Gumbs, Haug, Ho, Li, Lin, Lin, Lin, Liu, Machón, Marinopoulos, Mowbray, Onida, Pitarke, Rivacoba, Shyu, Tasaki, Zhang, Zhao, Zhou   +27 more
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Light-induced absorption in photorefractive strontium barium niobate [PDF]

, 1994
Sr0.59Bao.41Nb2O6 and Sro.75Bao.25Nb2O6 exhibit an intensity-dependent absorption in the visible spectral range. We perform pump (green)-probe (red) measurements and find variation as high as 0.45 cm-' in the absorption coefficient, which depends ...
Neurgaonkar, Ratnakar R., Orlov, Sergei, Segev, Mordechai, Yariv, Amnon   +3 more
core   +1 more source