Icing is widely recognized as one of the most serious weather hazards to aircraft operations. Aircraft icing occurs when small, super-cooled, airborne water droplets, which make up clouds and fog, freeze upon impact with a surface, which results in the formation of ice (Mason 1971). The freezing can be complete or partial, depending on how rapidly the latent heat of fusion can be released into ...

The aim of this study was to assess whether surface treatment improves zirconia-porcelain adhesion. The 3Y-TZP blocks were cut into squares, then polished and sintered. The zirconia surface treatments were performed as follows: no treatment (C); tribochemical silica coating (TBS); glaze application + hydrofluoric acid etching (GA); glaze application + hydrofluoric acid etching + silanization (G...

This paper examines two pieces of Ru porcelain glaze excavated from the Qingliangsi kiln site. Compared with R1 glaze, R2 was fired at a lower temperature and cooled slower rate. The chemical composition, microstructure, corrosion mechanisms glazes were analyzed by optical microscopy (OM), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), micro-Raman spectroscopy, tra...

In situ quantification of localizedweathering processes on basalt flows inNewMexico andHawaii demonstrates that small-area factors can be more important than other more readily observable factors. Further, it demonstrates that the factorial concept of the Pope Boundary-Layer weathering model is partially solvable, that organicweathering can accentuate glassweathering (with implications for clim...

Shards of Blue-and-White Ming porcelain from shipwrecks Portuguese ships found on the coasts South Africa plus a shard Mombasa (Kenya) were analyzed by optical microscopy, SEM-EDS and Raman microspectroscopy (458 nm). Whereas signature body paste compositions which are based mullite, quartz an amorphous phase with minor presence anatase feldspar very comparable whatever variable alumina content...

Large black single crystals with a metallic luster of Li16Sr6Ge6N and several other representatives the series Li16Ae6Tt6N Li16Ae6Tt6.5 (Ae=Ca, Sr; Tt=Si, Ge, Sn, Pb) were grown from mixtures respective elements addition binary alkaline-earth metal nitrides or lithium nitride in case nitrides. For synthesis modified high-temperature centrifugation-aided filtration (HTCAF) technique using reacti...

The electrical performance of transmission line insulators will decrease dramatically under ice-covered conditions, and ice flashover may occur operating voltage. There is no direct effective monitoring method for cover on lines. In this paper, the interface quasi-distributed fibre Bragg grating (FBG) used to study positioning detection glaze icing loads composite insulators, a mechanical lever...

We investigated tree textures starting from art historical sources describing the complicated appearance of trees, proceeding with an empirical survey using computer vision techniques, concluding with an overview of physical factors. Our main question was: Which perceptual, image statistical and optical phenomena primarily determine the appearance of trees and how are these phenomena related? T...

This study evaluated, in vivo, the efficacy of a denture glazing material (Palaseal) in modifying plaque colonization of dentures. Ten subjects were selected and received maxillary temporary partial removable dentures, with complete acrylic palatal coverage. The right half of the fitting surface of the denture bases were glazed with Palaseal, whereas the other half was not glazed. One month aft...