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Certified reference materials (CRMs) are 'controls' or standards used to check the quality and metrological traceability of products, to validate analytical measurement methods, or for the calibration of instruments. [1] A certified reference material is a particular form of measurement standard.
These master standards have extreme-accuracy regional copies (kept in the national laboratories of various countries, such as NIST), and metrological equipment makes the chain of comparisons. Because the definition of the meter is now based on a light wavelength, the international prototype of the meter is not quite as indispensable as it once was.
The δ values and absolute isotope ratios of common reference materials are summarized in Table 1 and described in more detail below. Alternative values for the absolute isotopic ratios of reference materials, differing only modestly from those in Table 1, are presented in Table 2.5 of Sharp (2007) [1] (a text freely available online), as well as Table 1 of the 1993 IAEA report on isotopic ...
Logo. The Cryptographic Module Validation Program (CMVP) is a joint American and Canadian security accreditation program for cryptographic modules.The program is available to any vendors who seek to have their products certified for use by the U.S. Government and regulated industries (such as financial and health-care institutions) that collect, store, transfer, share and disseminate ...
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Exemplified certified copy of Decree Absolute issued by the Family Court Deputy District Judge – divorce certificate. A certified copy is a copy (often a photocopy) of a primary document that has on it an endorsement or certificate that it is a true copy of the primary document. It does not certify that the primary document is genuine, only ...
Hints and the solution for today's Wordle on Wednesday, January 15.
Areas in Queens, Bronx, Staten Island and Yonkers are among the locations listed in the FAA's recent wave of drone restrictions.. According to Homeland Security, critical infrastructure includes ...