منابع مشابه
Low - Speed Aerodynamic Characteristics of NACA 0012 Aerofoi ] Section , including the Effects of Upper - Surface Roughness Simulating Hoar Frost
Results are presented for the aerodynamic characteristics of NACA 0012 aerofoil section at Reynolds numbers of 2-88 x 106 and 1.44 x 10 6 with some indications of scale effect at other Reynolds numbers. The measurement of CLmax at a Reynolds number of 2-88 x 10 6 is uncertain for two reasons. On the one hand, a laminar separation bubble disappears intermittently for reasons that are not fully u...
متن کاملSpectral measurements of surface hoar crystals
Surface hoar crystals are commonon the surface ofmountain snowcovers.Onceburied, layers of large plate-shaped surface hoar crystals are prone to releasing dangerous snow-slab avalanches. Since snow microstructure influences the optical properties of snow, remote sensors could potentially detect the formation of surface hoar and other snow types associated with avalanche release. The spectral re...
متن کاملHoar-crystal Method for Ice Fabrics
A new method has been developed for the observation of crystal axes orientation in fine -grained polycrystalline ice (grain-size approx imately one millimetre). A two per cent ethylene dichloride solution of polyvinyl formal (Formvar) is applied to the surface of a sample. This solution prod uces adequate density of small holes in the Formvar coating and subsequently the nucleatio n sites for h...
متن کاملFrost heave
The deformation of the ground surface that is produced by frost heave has motivated almost a century of concerted laboratory, field and theoretical studies. Well before the development of equipment capable of resolving the microscopic films that support liquid transport towards growing ice lenses, early investigators predicted their occurrence and noted their importance. Idealized experiments c...
متن کاملUremic frost
Full blown uremic syndrome of chronic kidney disease (CKD) is seldom seen these days due to early initiation of renal replacement therapies (RRT) [1, 2]. Uremic frost is a manifestation of advanced CKD but rarely seen due to effective RRT. We came across a 21-year-old male patient, brought to us with complaints of nausea, anorexia, oliguria and recent onset alteration in sensorium. On physical ...
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ژورنال
عنوان ژورنال: Nature
سال: 1885
ISSN: 0028-0836,1476-4687
DOI: 10.1038/032030b0