Results 1 to 10 of about 317,486 (183)

On the attenuation coefficient of monomode periodic waveguides [PDF]

Physical Review Letters, 2011
It is widely accepted that, on ensemble average, the transmission T of guided modes decays exponentially with the waveguide length L due to small imperfections, leading to the important figure of merit defined as the attenuation-rate coefficient alpha = -
A. Baron, D. Marcuse, H. A. Haus, P. Lalanne, S. Mazoyer, W. Smigaj   +5 more
core   +9 more sources

Study on measurement of sound attenuation coefficient in bubble wake by pool [PDF]

E3S Web of Conferences, 2020
In this paper, bubbles are generated by controlling the air inlet volume of the ceramic tube array with a gas divider valve. Stimulation tests of sound attenuation characteristics of the wake of bubbles in a laboratory pool are performed.
Han Jing, Lv Shuai, Wu Zhongpeng, Zhang Mingwei, Bai Jin   +4 more
doaj   +1 more source

Estimation of Attenuation Coefficient Values Using Remote Sensing and Its Relationship With Shallow Water Depth

Journal of Applied Geospatial Information, 2023
In ocean remote sensing, the intensity of light entering the water column decreases exponentially with increasing depth due to scattering and particle absorption in the water column.
Anggi Tiarasani, Vincentius Paulus Siregar, Jonson Lumban Gaol   +2 more
doaj   +1 more source

Two-dimensional shear wave elastography and ultrasound-guided attenuation parameter for progressive non-alcoholic steatohepatitis.

PLoS ONE, 2021
Background and aimsWe investigated the usefulness of combining two-dimensional shear wave elastography and the ultrasound-guided attenuation parameter for assessing the risk of progressive non-alcoholic steatohepatitis, defined as non-alcoholic ...
Hidekatsu Kuroda, Yudai Fujiwara, Tamami Abe, Tomoaki Nagasawa, Takuma Oguri, Sachiyo Noguchi, Naohisa Kamiyama, Yasuhiro Takikawa   +7 more
doaj   +1 more source

Research on relationship between tailing slurry concentration and ultrasonic attenuation coefficient

Gong-kuang zidonghua, 2020
In view of problem that the current tailing slurry concentration measurement method based on ultrasonic method does not directly express correlation between concentration and scattering attenuation coefficients and viscous attenuation coefficients, the ...
WANG Jianxin, CHENG Junhao
doaj   +1 more source

Investigation of Gamma Ray Buildup Factor for some Shielding Absorber

Cumhuriyet Science Journal, 2022
The purpose of this research is to observe and understand the processes by which gamma rays are attenuated in passing through absorber, and the effects of shielding geometry.
Hiwa Mohammad Qadr
doaj   +1 more source

Bayesian analysis of depth resolved OCT attenuation coefficients

Scientific Reports, 2021
Optical coherence tomography (OCT) is an optical technique which allows for volumetric visualization of the internal structures of translucent materials.
Lionel D. Fiske, Maurice C. G. Aalders, Mitra Almasian, Ton G. van Leeuwen, Aggelos K. Katsaggelos, Oliver Cossairt, Dirk J. Faber   +6 more
doaj   +1 more source

Single-shot attenuation coefficient estimation for ultrasound contrast agents

Frontiers in Physics, 2022
Ultrasound contrast agents (UCAs) have broadened the scope of ultrasound imaging and therapeutic applications. One of the parameters of interest when measuring the response of UCAs to ultrasound is their frequency-dependent attenuation coefficient.
Jasleen Birdi, Jasleen Birdi, Sophie V. Heymans, Sophie V. Heymans, Gonzalo Collado-Lara, Koen Van Den Abeele, Jan D’hooge, Alexander Bertrand, Alexander Bertrand   +8 more
doaj   +1 more source

Gamma Radiation Shielding Properties of Slag and Fly Ash-based Geopolymers

Atom Indonesia, 2021
Industrial waste-based geopolymer cement is a greener alternative to Ordinary Portland Cement (OPC) for radiation shielding with comparable mechanical properties without the production of CO2 during synthesis.
M. W. Hasan, S. Sugiharto, S. Astutiningsih   +2 more
doaj   +1 more source

Investigation of gamma radiation shielding features for modified structural materials for nuclear energy and nuclear medicine [PDF]

Nuclear Technology and Radiation Protection, 2023
In this paper, shielding characteristics of three concrete samples with different B4C,Fe3O4,and BaSO4 contents were examined by determining their theoretical and experimental mass attenuation coefficients at photon energies of 15 MeV.
Zaripova Yuliya, Dyachkov Vyacheslav, Gladkikh Tatyana, Bigeldiyeva Mirgul, Diab Nasr Ahmed Nasr   +4 more
doaj   +1 more source