Results 61 to 70 of about 306,957 (330)
The Effect of Temperature Gradient on Ultrasonic Attenuation [PDF]
, 1973 The effect of temperature gradient on ultrasonic attenuation is estimated based upon the simple phenomenological theory, and it being found that the attenuation coefficient for a CdS crystal is 0.76 dB/cm at temperature gradient 100 K ...
Ishii, Tadao
core +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Olfactory dysfunction is frequently observed in patients with multiple sclerosis (MS); however, its underlying mechanisms remain poorly understood. To date, no studies have directly examined the nasal mucosal microbiota in MS. This study aimed to explore potential relationships among olfactory function, nasal microbiota composition,
Zidan Gao +5 more
wiley +1 more source
Representative Elementary Length to Measure Soil Mass Attenuation Coefficient
The Scientific World Journal, 2014 With increasing demand for better yield in agricultural areas, soil physical property representative measurements are more and more essential. Nuclear techniques such as computerized tomography (CT) and gamma-ray attenuation (GAT) have been widely ...
J. A. R. Borges +2 more
doaj +1 more source
Study of γ-ray energy losses in the ionic crystalsusingMonte Carlo code [PDF]
Kirkuk Journal of Science, 2015 In this paper, measurements were carriedout of thecalculated attenuation of the ranges gamma rays energy(279,356,479,662) KeV and using radioactive sources (Hg203, Ba133, W189, Cs137).
Abdulhadi M. Ghelab +2 more
doaj +1 more source
Applied Sciences, 2022 Artificial filled joints made of sand–clay mixtures with different clay weight fractions and saturations have different wave attenuation capacities.
Sheng Li +3 more
doaj +1 more source
Measurement errors with low-cost citizen science radiometers [PDF]
, 2016 The KdUINO is a Do-It-Yourself buoy with low-cost radiometers that measure a parameter related to water transparency, the diffuse attenuation coefficient integrated into all the photosynthetically active radiation. In this contribution, we analyze the
Bardají, R., Piera Fernández, Jaume
core
Theoretical modelling of frequency dependent elastic loss in composite piezoelectric transducers [PDF]
, 2007 The large number of degrees of freedom in the design of piezoelectric transducers requires a theoretical model that is computationally efficient so that a large number of iterations can be performed in the design optimisation.
Hayward, G. +5 more
core +1 more source
Prevalence of Stroke and Diagnostic Performance of Emergency MRI in Acute Isolated Dizziness
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Stroke is frequently misdiagnosed in patients presenting with acute isolated dizziness; the optimal imaging modality for this population remains debated. This study aimed to determine the prevalence of stroke among patients with isolated dizziness and to assess the diagnostic accuracy of magnetic resonance imaging (MRI) and computed ...
Xiao Hu +11 more
wiley +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Cognitive impairment, fatigue, and depression are common in multiple sclerosis (MS), potentially due to disruption of regional functional connectivity caused by white matter (WM) lesions. We explored whether WM lesions functionally connected to specific brain regions contribute to these MS‐related manifestations.
Alessandro Franceschini +7 more
wiley +1 more source
Physical Modeling and Analysis of P-Wave Attenuation Anisotropy [PDF]
, 2007 Anisotropic attenuation can provide sensitive attributes for fracture detection and lithology discrimination. This paper analyzes measurements of the P-wave attenuation coefficient in a transversely isotropic sample made of phenolic material.
van Wijk, Kasper
core +1 more source