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Many hatching patterns have been standardized by the American National Standards Institute (ANSI) and the International Standards Organization (ISO), though there are many other predefined patterns that may be used. Thus, the hatching pattern of steel varies from that of aluminum, copper, etc. The patterns are not only for metals. Patterns for ...
He is known for recognizing a unique pattern of cross-hatching lines on the surface of iron-rich meteorites, now called Widmanstätten patterns, resulting from the cooling and crystallization of interstitial minerals. A crater on the Moon is named after Widmanstätten. A print of the pattern from Elbogen iron meteorite made by Von Widmannstätten
Widmanstätten patterns, also known as Thomson structures, are figures of long phases of nickel–iron, found in the octahedrite shapes of iron meteorite crystals and some pallasites. Iron meteorites are very often formed from a single crystal of iron-nickel alloy, or sometimes a number of large crystals that may be many meters in size, and ...
A crossed letter, 1837, Ontario, Canada Cross-hatched letter of 1837, Massachusetts, USA.. A crossed letter is a manuscript letter which contains two separate sets of writing, one written over the other at right-angles.
The "abstract drawing" (ochre cross-hatching) discovered in Blombos Cave in South Africa, ca. 73,000 years old. [5]In 2002 in Blombos cave, situated in South Africa, ochre stones were discovered engraved with grid or cross-hatch patterns, dated to some 70,000 years ago.
Hatching for iron (ferro) and steel (acciaio) were introduced by two Italian heraldists Guelfi Camaini and Goffredo di Crollanza, but these were rarely used. [citation needed] The heraldic furs (ermine, vair) do not need a special hatching method, as they have a special pattern that is easily recognizable even on the uncoloured illustrations ...
[7] [8] Venditti et al. (2005) [7]: 1 report that instantaneous initiation begins with the formation of a cross-hatch pattern, which leads to chevron-shaped forms that migrate independently of the pattern structure. This chevron-like structure reorganizes to form the future crest lines of the bedforms.
The cross-hatched plane is the linear span of u and v in both R 2 and R 3. In mathematics , the linear span (also called the linear hull [ 1 ] or just span ) of a set S {\displaystyle S} of elements of a vector space V {\displaystyle V} is the smallest linear subspace of V {\displaystyle V} that contains S . {\displaystyle S.}
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