the roughness of a surface

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• Roughness — is a measure of the texture of a surface. It is quantified by the vertical deviations of a real surface from its ideal form. If these deviations are large, the surface is rough; if they are small the surface is smooth. Roughness is typically… …   Wikipedia

• Roughness Length — (z 0) is a parameter which is a measure of terrain roughness as seen by surface wind. It is formally the height (in meters) at which the wind speed becomes zero when the logarithmic wind profile above the roughness sub layer is extrapolated to… …   Wikipedia

• Surface plasmon — Surface plasmons, also referred to in the literature as surface plasma polaritons, are fluctuations in the electron density at the boundary of two materials. Plasmons are the collective vibrations of an electron gas (or plasma) surrounding the… …   Wikipedia

• roughness — noun 1. a texture of a surface or edge that is not smooth but is irregular and uneven (Freq. 2) • Syn: ↑raggedness • Ant: ↑smoothness • Derivationally related forms: ↑ragged (for: ↑ …   Useful english dictionary

• surface analysis — ▪ chemistry Introduction       in analytical chemistry (chemistry), the study of that part of a solid that is in contact with a gas or a vacuum. When two phases of matter are in contact, they form an interface. The term surface is usually… …   Universalium

• surface quality — noun a numerical description of the flatness or roughness of a surface, especially an optical or machined surface …   Wiktionary

• Surface metrology — is the measuring of small scale features on surfaces, and is a branch of Metrology. Surface primary form, surface waviness and surface roughness are the parameters most commonly associated with the field. It is important to many disciplines and… …   Wikipedia

• Surface irrigation — is defined as the group of application techniques where water is applied and distributed over the soil surface by gravity. It is by far the most common form of irrigation throughout the world and has been practiced in many areas virtually… …   Wikipedia

• Surface (disambiguation) — Surface may mean:*Surface, a two dimensional manifold in mathematics *Microsoft Surface, a touch sensitive user interface from Microsoft * Surface (magazine), an American design magazine * Surface (TV series), an NBC television show *Surface… …   Wikipedia

• The Lady of Rage — Nom Robin Yvette Allen Naissance 11 juin 1968 Activité principale Rappeuse, actrice Genre musical Hip hop Années d activité 1989 …   Wikipédia en Français

• Martian surface — The study of surface characteristics (or surface properties and processes[1]) is a broad category of Mars science that examines the nature of the materials making up the Martian surface. The study evolved from telescopic and remote sensing… …   Wikipedia