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Erosion

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Full-Text Articles in Physical Sciences and Mathematics

The Gold Coast Transformed : From Wilderness To Urban Ecosystem, Tor Hundloe, Bridgette Mcdougall, Craig Page Apr 2015

The Gold Coast Transformed : From Wilderness To Urban Ecosystem, Tor Hundloe, Bridgette Mcdougall, Craig Page

Tor Hundloe

Extract: This is the story of a unique city, Australia’s premier tourist city, a city cut out of coastal vegetation, including paperbark swamps, mangroves and rainforests of worldwide significance. The city has a relatively short history as until half a century ago (two human generations) it was but several relatively small villages, each with its own natural and social features. Two generations is a very short time for a city to grow to be the sixth-largest in population in Australia and to have global recognition as the country’s beach playground. The Gold Coast ranks with Honolulu in Hawaii, with Palm …

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Ionic Polishing Of Fused Silica And Glass, Raymond Wilson Dec 1969

Ionic Polishing Of Fused Silica And Glass, Raymond Wilson

Raymond Wilson

This paper reviews research in the erosion of fused silica and glass in an effort to gain a better understanding of the ionic polishing process as applied to optical materials. Erosion rates depend on ion mass, ion energy, target temperature, angle of incidence, and target material, and can also depend on vacuum pressure. The paper also considers other effects that accompany ionic bombardment of insulators, such as nature of the eroded surface, contaminate films, surface layer alterations, secondary electron emission, and gas trapping and release.

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