lots are also included in the analysis. The data cover 36 years of activity by the National Institute of Standards and Technology (NIST) in developing and providing thermal insulation SRMs, specifically high-density molded fibrous-glass board, to the public. Collectively, the data sets cover two

of crude oils. In this work, gas chromatography (GC)-amenable C9−C33 hydrocarbons were comprehensively characterized from the National Institute of Standards and Technology Standard Reference Material (NIST SRM) 2779 Gulf of Mexico crude oil by GC coupled to vacuum ultraviolet photoionization mass

conducted using Standard Reference Material 1941b prepared by the National Institute of Standards and Technology,

the formation of OSA using the Standard Reference Material 1941b. The experiments were performed using Arabian Medium, Alaska North Slope and South Louisiana crudes. Sediment concentrations varied from 25 to 300 mg/L. A new procedure was developed to separate the OSAs from the bulk water, measure the oil

Numerous sites worldwide have been identified as having significant radioactive contamination, either as a result of routine or accidental releases. The radiological impact of this contamination depends on the extent to which the radionuclides are taken up by organisms, including humans. The mobility, and thus availability, of the radionuclides is greatly determined by the physico-chemical form (speciation) of the radionuclides in the soil or sediment in question. One of the most common methods used to indirectly examine the speciation of radionuclides in the solid phase is the sequential extraction technique, which partitions a soil or sediment sample into operationally-defined sequentially-dissolved fractions (e.g.,

This paper describes a unified model for role-based access control (RBAC). RBAC is a proven technology for large-scale authorization. However, lack of a standard model results in uncertainty and confusion about its utility and meaning. The NIST model seeks to resolve this situation by unifying

The Elliptic Curve Digital Signature Algorithm (ECDSA) is the elliptic curve analogue of the Digital Signature Algorithm (DSA). It was accepted in 1999 as an ANSI standard, and was accepted in 2000 as IEEE and NIST standards. It was also accepted in 1998 as an ISO standard, and is under

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developing, maintaining and disseminating national metrology standards – realizations of the International System of Units (SI)- for the basic measurement quantities, and for many derived measurement quantities. Measurement results throughout the U.S., and indeed the world, are traceable to NIST