877 resultados para Stick-slip chaos


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--Harbingers of change.-- Martin Luther.-- Galileo Galilei.--Ludwig van Beethoven.-- James Watt.-- Thomas Hobbes.-- The new unity.

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"Contract no. AT(30-1)-2258"

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The slip-casting technique, which is successfully employed in the ceramic industry, was utilized to produce sintered stainless steel components experimentally. The procedure used is described, along with an evaluation of the physical and mechanical properties of the samples produced. Specimens were made with properties comparable to those of wrought stainless steel and of cold pressed and sintered steel powder.

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Mode of access: Internet.

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Mode of access: Internet.

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"Issued December 1979."

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Mode of access: Internet.

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Includes bibliographical references.

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Mode of access: Internet.

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"Purdue Research Foundation. Research project no. 2649. Project Ae-51."

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40Ar/39Ar geochronology of muscovite and biotite grains genetically related to gold and Be–Ta–Li pegmatites from the Seridó Belt (Borborema province, NE Brazil) yield well-defined, reliable plateau ages. This information, combined with data about paragenetic and field relationships, reveals Cambro-Ordovician mineralization ages (520 and 500–506 Ma) for the orogenic gold deposits in the Seridó Belt. Biotite ages of 525±2 Ma, which represent the mean weighted results of the incremental heating analysis of six biotite single crystals, record the time of pegmatite emplacement and reactivation of Brasiliano/Pan-African strike-slip shear zones. These results, along with previous structural evolution studies, suggest that shear zones formed during the Brasiliano/Pan-African event were reactivated in the Upper Cambrian–Lower Ordovician. Mineralization occurs late in the history of the orogen.