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[Projections of the bile ducts onto the surface of the liver].
Vestnik khirurgii imeni I. I. Grekova, 1966 openaire +1 more source
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The Journal of the Acoustical Society of America, 1978
Two surface duct propagation experiments are examined in which absorption and diffraction appear to be the dominant attenuation mechanisms. The absence of an excess diffusion loss suggests that little or no internal scatter occurs in a mixed layer. This result is consistent with the internal wave scatter hypothesis.
R. H. Mellen, D. G. Browning
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Two surface duct propagation experiments are examined in which absorption and diffraction appear to be the dominant attenuation mechanisms. The absence of an excess diffusion loss suggests that little or no internal scatter occurs in a mixed layer. This result is consistent with the internal wave scatter hypothesis.
R. H. Mellen, D. G. Browning
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Effectiveness of duct cleaning methods on newly installed duct surfaces
Indoor Air, 2003Two kinds of air duct cleaning methods, mechanical brushing with different brushes and compressed air cleaning, were compared in the laboratory and in newly built buildings. The ducts were contaminated either with test dust or with dust originated from a construction site.
R. Holopainen +5 more
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Sialography and Surface Anatomy of the Parotid Duct
Archives of Otolaryngology - Head and Neck Surgery, 1960The many variations in shape and extent of the parotid gland are well known. The parotid gland is larger than indicated in textbooks. 14 Not only does this structure vary in different persons, but also on the two sides of the same person. 36 Hetzar's 15 finding of differences of the parotid glands in the two sexes and in persons of different ...
H. OPPENHEIM, M. WING
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Mixed layers and surface ducts
The Journal of the Acoustical Society of America, 2021The upper ocean is strongly effected by the sun and the wind. In an idealized view, this leads to a warm mixed layer with a nearly constant temperature and salinity. Then, the increase in pressure with depth causes an increase of about 1.7 m/s in sound speed for every 100 m in depth (i.e., a gradient of 0.017/s). This gradient forms an acoustic surface
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Sound Propagation in a Surface Duct with a Rough Surface
The Journal of the Acoustical Society of America, 1973Sound propagating in a surface duct is partially scattered by surface reflections. This can be accounted for in propagation models by first using a surface reflection coefficient with modulus less than one and then by adding a ray theory correction representing sound scattered directly from the surface to the receiver.
H. P. Bucker, J. L. Thompson
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