striation


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striation

1. an arrangement or pattern of striae
2. another word for stria (sense 1)

Striation

Fine, narrow ridges or grooves parallel to each other.

Striation

 

any one of the alternating light and dark bands occurring in the positive column of a vacuum tube during electric discharge through a gas. In some cases, the striations are static; in others they move rapidly, usually from the anode to the cathode. The bright and sharp side of each striation faces the cathode. The brightness of the striation, as a rule, diminishes in the direction of the anode. According to recent concepts, the electric field intensity and the temperature and concentration of electrons are great in the head of the striation (from the cathode side). As the electrons move in the process of diffusion from the head of the striation toward the anode, their concentration and temperature fall off to the point where ionization ceases. There is then a new jump in electric potential, and a new striation is formed.

REFERENCES

Nedospasov, A. V. “Straty.” Uspekhi fizicheskikh nauk, 1968, vol. 94, issue 3, pp. 439–62.
Pekarek, L. “Ionizatsionnye volny (straty) v razriadnoi plazme.” Uspekhi fizicheskikh nauk, 1968, vol. 94, issue 3, pp. 463–500.

striation

[strī′ā·shən]
(electronics)
A succession of alternately luminous and dark regions sometimes observed in the positive column of a glow-discharge tube near the anode.
(geology)
One of a series of parallel or subparallel scratches, small furrows, or lines on the surface of a rock or rock fragment; usually inscribed by rock fragments embedded at the base of a moving glacier.
(mineralogy)
One of a series of parallel, shallow depressions or narrow bands on the cleavage face of a mineral caused either by growth twinning or oscillatory growth of different crystal faces.
References in periodicals archive ?
Clava measured 2 [micro]m in height and 1 [micro]m capita in width, showing a clavum shape with six striations slightly visible (Fig.
In practice, the angle of the striation marks will become more sensitive to braking as the slip angle increases.
Valid striation marks are located by applying an edge detection technique and by subsequent filtering processes so that only valid correlation areas are used for the compressed profile generation.
Only a change in striation form at the lower cut edge can be seen with greater cutting speeds.
Some of the main turning points of this to-and-fro have arisen from the arguments that I was not creating striations through my actions--I was not determining the actions of other players in a definitive manner.
Deleuze and Guattari explain that, while capitalism has taken striation to "an unequaled point of perfection, circulating capital necessarily recreated, reconstituted, a sort of smooth space in which the destiny of human beings is recast" (492).
Oblique striation has been described for muscles of platyhelminths, nematodes, gastrotrichs, nematomorphs, priapulids, pogonophora, chaetognathes, annelids, molluscs, brachiopods, and an echinoderm (3-7, 9), and dense bodies are an obvious feature in all taxa.
In Equation 1, [alpha] is the slip angle of the tire and [theta] is the angle of the striation mark, as illustrated in Figure 1.
Propodosomal shield dotted anterio-medially with striations .
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The new applicator, inspired by a slim-cut diamond, offers tiny striations that soak in the formula.
The lineations and striations on the faulted surfaces indicate multi deformational events.