This paper describes a uni ed 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 ideas from prior RBAC models, commercial products and research prototypes. It is intended to serve as a...

NIST has recently established a detector-based luminous intensity unit (candela, cd), which is derived from the NIST absolute cryogenic radiometer. Subsequently, the luminous flux unit (lumen, lm) and the luminance unit (cd/m2) have been established based on the detector-based candela, and now all the NIST photometric units are tied to the cryogenic radiometer. The illuminance unit is realized ...

WANTED: MEASUREMENTS WITH GOOD REFERENCES In nearly all types of activities-be they related to manufacturing, finance, health, regulatory affairs or even sports-people and organizations are becoming sticklers for measurement uncertainty. NIST, the nation’s measurement authority, has responded to this growing customer need for demonstrable uncertainty. It has created an on-line resource— www.nis...

For more than 15 years, the Intelligent Systems Division of the National Institute of Standards and Technology (NIST) has worked closely with the Army Research Laboratory (ARL) on architectures and technology development for intelligent control of unmanned vehicle systems. During the early 1990’s, NIST developed techniques for retrotraverse of trajectories recorded using teleoperation. In the l...

The NIST (National Institute of Standards and Technology) has recently made available 222Rn emanation standards for test and evaluation. The NIST certified parameters include the ^ ~ a strength and the emanation coefficient. When such a source is loaded into a radon leak tight enclosure of a known volume, 222~n accumulates over time and it is possible to calculate precisely the time integrated ...

An isotope-dilution liquid chromatography-tandem mass spectrometry (ID LC-MS/MS) measurement procedure was developed to accurately quantify amino acid concentrations in National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) 2389a-amino acids in 0.1 mol/L hydrochloric acid. Seventeen amino acids were quantified using selected reaction monitoring on a triple quadr...

Studi ini didasarkan pada banyaknya kejahatan yang terjadi di dunia maya. mengkaji data smartphone apa saja biasa diambil oleh tindak Penerapan perkembangan digital ilmu forensik , mendukung penyelesaian beberapa kasus Penyelesaian cybercrime biasanya menggunakan sistem informsasi forensic.National Institute of Standards and Technology (NIST) merupakan salah satu metode informasi forensik. Meto...

This paper describes the IIRG’s first implementation of a system for automatic Knowledge Base Population (KBP). The Text Analysis Conference (TAC), first organised by NIST in 2008, promotes further research in Natural Language Technologies. In 2009, NIST added a Knowledge Base Population Track to TAC, the goal of this track was to promote research in to the automatic population of knowledge bases.

Tbe latest NIST result from the comparison of the quantized Hall resistance (QHR) with the realization of the SI ohm obtained from the NIST calculable capacitor is reported. A small difference between the 1988 result and the present result has led to a re-evaluation of the sources and magnitudes of possible systematic errors.

The National Institute of Standards and Technology (NIST) and The University of Maryland jointly hosted the Fiftieth Annual Conference on Physical Electronics, held at NIST in Gaithersburg, MD, June 11-13, 1990. This annual conference provides a forum where important new research results concerned with the physics and chemistry of solid surfaces presented in a 3-day conference with ample time f...