Results 21 to 30 of about 306,957 (330)
Tikrit Journal of Pure Science, 2023 Calculations on shielding are required for building a gamma ray radiography exposure room to ensure that the workers are exposed to radiation. The linear attenuation coefficient ( ) is a measurement used to evaluate the radiation diffusion and ...
Berun Nasralddin Ghafoor +1 more
doaj +1 more source
Underwater optical wireless communications : depth dependent variations in attenuation [PDF]
, 2013 Depth variations in the attenuation coefficient for light in the ocean were calculated using a one-parameter model based on the chlorophyll-a concentration Cc and experimentally-determined Gaussian chlorophyll-depth profiles.
Green, Roger +2 more
core +1 more source
Journal of Kufa-Physics, 2018 The attenuation measurements of x-ray of voltage range (21kv) for hosted polymer material were done using x-ray unit, in order to extract the effect of adding carboxy methyl cellulose material (CMC) to low density polyethylene on x-ray radiation ...
Raed M.Shaban +4 more
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Measurement of the Attenuation Coefficient in Fresh Water Using the Adjacent Frame Difference Method
Photonics, 2022 The attenuation coefficient of a water body is one of the important factors for describing its features. However, its remote measurement in real time is still a challenge.
Gang Yang +5 more
doaj +1 more source
A study on the drag coefficient in wave attenuation by vegetation [PDF]
Hydrology and Earth System Sciences, 2021 Abstract. Vegetation in wetlands is a large-scale nature-based resource providing a myriad of services for human beings and the environment, such as dissipating incoming wave energy and protecting coastal areas. For understanding wave height attenuation by vegetation, there are two main traditional calibration approaches to the drag effect acting on ...
Z. Zhang +13 more
openaire +4 more sources
Light attenuation coefficient of polarization attenuator at high attenuation level
Acta Physica Sinica, 2010 By use of the Jones vector we deduced the Jones matrix of actual polarizer and light transmission expression, as well as the light attenuation coefficient （LAC） of two polarizers. According to computation, certain error exists when using Malus-Law to calculate polarizer’s light attenuation ratio at high attenuation level.
Chen Hai-Qing +3 more
openaire +2 more sources
Ultrasound attenuation dependence on air compression or expansion processes [PDF]
, 2010 In this work variation of ultrasonic attenuation coefficient is analyzed in terms of air compression or expansion processes. In\ud closed spaces changing air volume, the ultrasound attenuation coefficient depends on thermodynamic processes which occur ...
Demcenko, A. +2 more
core +7 more sources
Stress wave attenuation in shock-damaged rock [PDF]
, 1996 The velocity and attenuation of ultrasonic stress waves in gabbroic rock samples (San Marcos, California) subjected to shock loading in the 2 GPa range were studied.
Ahrens, Thomas J., Liu, Cangli
core +2 more sources
IEEE Photonics Journal, 2016 We present an optimized attenuation compensation and contrast enhancement algorithm to improve the quality of the intravascular optical coherence tomography (IVOCT) images and overcome the drawbacks of the previous algorithms, including ...
Yonghan Zhou +8 more
doaj +1 more source
Impact of open de-ionized water thin film laminar immersion on the liquid immersed ablation threshold and ablation rate of features machined by KrF excimer laser ablation of bisphenol A polycarbonate [PDF]
, 2009 Debris control and surface quality are potential major benefits of sample liquid immersion when laser micromachining; however, the use of an immersion technique potentially modifies the ablation mechanism when compared to an ambient air interaction.
C.F. Dowding +23 more
core +2 more sources