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Which gemstone is known as the queen of gems?

Gemstones are one of nature's most beautiful mysteries. Each stone has a unique story, from the Diamond, which is often older than the stars, to the Peridot, which has been found in stardust from ...
Gemological Institute of America

Peridot from Tanzania

Peridot from a new locality, Tanzania, is described and compared with 13 other peridots from various localities in terms of color and chemical composition. The Tanzanian specimen is lower in iron ...
IEEE

Radiation Hardness Assurance Through System-Level Testing: Risk Acceptance, Facility Requirements, Test Methodology, and Data Exploitation

Abstract: Functional verification schemes at a level different from component-level testing are emerging as a cost-effective tool for those space systems for which the risk associated with a lower ...
Nature

Variation of Hardness of Metals with Grain Size

IN the past, several sets of measurements have been made of the variation of Brinell hardness number with grain size, notably on α-brass1, copper and bronze2, and ‘Armco’ iron3. The consistent ...
C&EN

Hardness and Mechanical Properties of Wurtzite B–C–N Compounds

Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to ...