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  1. 81
    “…RESULTS: Our acoustic characterization shows that Stycast 1090SI has tissue-like acoustic impedance, high speed of sound and low acoustic attenuation. These acoustic properties ensure an excellent acoustic lens material to minimize the acoustic insertion loss. …”
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  2. 82
  3. 83
    por Takahata, Yoko
    Publicado 2018
    “…The stiffness index of the calcaneus, broadband ultrasound attenuation of the calcaneus, speed of sound of the calcaneus, and body frame index. …”
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  4. 84
    “…We further used the speed of sound maps retrieved by the transmission ultrasound tomography to improve optoacoustic reconstructions via two-compartment modeling. …”
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  5. 85
    por Mach, Ernst
    Publicado 2013
    “…Ernst Mach (1838–1916), the first scientist to study objects moving faster than the speed of sound, propounded a scientific philosophy which called for a strict adherence to observable data. …”
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  6. 86
    por Vacek, V, Hallewell, G D, Lindsay, S
    Publicado 2000
    “…Uncertainties in the speed of sound measurements were better than ± 0.1 %. …”
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  7. 87
    “…A compact thermometer for air temperature based on the measurement of the speed of sound was developed at INRIM. This paper focuses on the comparison of this instrument with platinum resistance thermometers in a climatic chamber over a temperature range (−30 ÷ +55) °C, relative humidity (10 ÷ 90)%rh, and irradiation (>1 kW/m(2)) values similar to those of surface atmospheric conditions. …”
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  8. 88
    “…For the heaviest reliably observed neutron stars5,6 with mass M≈ 2M⊙, the presence of quark matter is found to be linked to the behaviour of the speed of sound cs in strongly interacting matter. If the conformal bound $c_2^s \leqslant 1/3$ (ref. 7 ) is not strongly violated, massive neutron stars are predicted to have sizable quark-matter cores. …”
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  9. 89
    “…METHODS: We examined changes in anthropometry, body composition, and physical activity associated with changes in estimated bone mineral density (measured using quantitative ultrasound with a heel ultrasound device indicating broadband ultrasound attenuation BUA and speed of sound SOS) in a follow-up sample of n = 73 young men at the beginning and again 18 weeks later at the end of basic military training. …”
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  10. 90
    “…There was no appreciable improvement with harmonic imaging, colorization, or speed of sound. CONCLUSION: On a currently available clinical ultrasound scanning system, ultrasound scanning parameters can be adjusted to improve the conspicuity of biopsy markers. …”
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  11. 91
    “…Methods: We searched PUBMED and SCOPUS databases for studies of children and adolescents that assessed screen time and bone status, determined by measuring bone mineral content or density, bone stiffness index, bone speed of sound, bone broadband ultrasound attenuation, or frame index. …”
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  12. 92
    por Huseynzade, Elina
    Publicado 2023
    “…As the titles of the projects indicate, the first project focuses on the investigation of Mach shock waves, which are basically a type of pressure wave that propagates at the speed of sound within a compressible flow. Many experimental trials have been done so far but no proper evidence of the Mach cone has been found. …”
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  13. 93
    “…Brillouin scattering measurements are reported and enabled determining the stiffness of the silica walls (speed of sound) using finite element calculations for the ordered mesoporous structure. …”
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  14. 94
    “…Here, we present different models of the speed of sound in tubes, including the effects of real gases and an error analysis of the most accurate model with a Monte Carlo simulation. …”
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  15. 95
    “…In this review, the flow phantoms and the wall-less flow phantoms with recognized acoustic features (attenuation and speed of sound), interior properties, and dimensions of tissue were prepared, calibrated, and characterized by Doppler ultrasound (US) scanning which demands tissue-mimicking materials (TMMs). …”
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  16. 96
    “…We experimentally demonstrate the principle of DPC using tissue phantoms with calibrated speed-of-sound inclusions.…”
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  17. 97
    “…Thus, we need to prepare BMF with both a new mixture fluid and new scatter particle to be as a reflecting factor of ultrasonic waves, for evaluating the speed of sound of the blood flow in the same method like in the research study of ultrasound with relatively low-cost and less consuming time of preparation. …”
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  18. 98
    “…For example, one material can mimic one property—such as the density of real tissue—but not any other property, like speed of sound or attenuation.…”
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  19. 99
    “…Models predicted that: (1) atmospheric turbulence changes at centimetre scales or smaller at the point where molecular viscosity converts kinetic energy into heat(1), (2) the speed of sound varies at the surface with frequency(2,3) and (3) high-frequency waves are strongly attenuated with distance in CO(2) (refs. (2–4)). …”
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  20. 100
    por Musa, L
    Publicado 2012
    “…Such a determination of its properties including initial temperature, degrees of freedom, speed of sound, and in general, transport coefficients would be a major achievement. …”
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