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Displaying 30801 - 30825 of 73929

Performance Measurement Guide for Information Security

July 16, 2008
Author(s)
Elizabeth Chew, Marianne M. Swanson, Kevin M. Stine, N Bartol, Anthony Brown, W Robinson
This document provides guidance on how an organization, through the use of metrics, identifies the adequacy of in-place security controls, policies, and procedures. It provides an approach to help management decide where to invest in additional security

Reversal mechanisms in perpendicular magnetic nanostructures

July 16, 2008
Author(s)
Justin M. Shaw, Stephen E. Russek, Michael J. Donahue, Thomas Thomson, Bruce Terris, Michael Schneider, Miles Olsen
We find that the reversal mechanism in magnetic nanostructures is highly dependent on the nature and condition of the edges. Temperature and size dependent reversal properties of fabricated perpendicularly magnetized nanostructures down to 25 nm in

The Keyed-Hash Message Authentication Code (HMAC)

July 16, 2008
Author(s)
National Institute of Standards and Technology (NIST), Quynh Dang
This Standard describes a keyed-hash message authentication code (HMAC), a mechanism for message authentication using cryptographic hash functions. HMAC can be used with any iterative Approved cryptographic hash function, in combination with a shared

Dynamic Routing and Congestion Control Through Random Assignment of Routes

July 15, 2008
Author(s)
Fern Y. Hunt, Vladimir V. Marbukh
We introduce an algorithm for maximizing utility through congestion control and random allocation of routes to users. The allocation is defined by a probability distribution whose degree of randomness as measured by its entropy, is controlled. We seek to

Electron heating in rf-biased, inductively coupled plasmas

July 15, 2008
Author(s)
Mark A. Sobolewski, J. -. Kim
The effect of radio-frequency (rf) bias on electron density in an inductively coupled plasma reactor was measured using a wave cutoff probe, in Ar, CF4, and Ar/CF4 mixtures. At low source powers, we observed an increase in plasma electron density caused by

Liquid State NMR as a Test-bed for Developing Quantum Control Methods

July 15, 2008
Author(s)
C. A. Ryan, C. Negrevergne, M. Laforest, Emanuel Knill, R. Laflamme
Quantum mechanics has been successfully describing experimental phenomena for close to a century. However, it has only been much more recently that the idea of using quantum mechanical evolution to process information was realized. This has revolutionized

Lost Knowledge - What Will You Say in Your Last Lecture

July 15, 2008
Author(s)
Georgia L. Harris
Article highlights proposed efforts by National Conference of Standards Laboratories International (NCSLI) Learning and Development committees to capture metrological knowledge in the profession.

NCSLI: Approved for the 2008 Combined Federal Campaign (CFC)!

July 15, 2008
Author(s)
Georgia L. Harris
Federal employees can now contribute their tax-deductible contributions through the Combined Federal Campaign (CFC) and support NCSL International efforts at the same time. NCSLI's code is 26683 for 2008. We will be listed in the National/International

Conformance Testing and Interoperability: A Case Study in Healthcare Data Exchange

July 14, 2008
Author(s)
Robert D. Snelick, Leonard E. Gebase, Mark Skall
Correct data exchange is critical for ensuring reliable healthcare systems. Standards based systems are the foundation for achieving this goal. However, standards alone are not enough to ensure this promise; conformance and interoperability testing are

Generating Network Models Using the S-Metric

July 14, 2008
Author(s)
Isabel M. Beichl, Brian D. Cloteaux
The ability to create random models of real networks is useful for understanding the interactions of the networks. Several researchers have proposed modeling of complex networks using the degree distribution, the most popular being a power-law distribution

Joe D. Simmons Memorial Scholarship

July 14, 2008
Author(s)
Norman B. Belecki, Dilip Shah, Diana Poulton, Mark Lapinskis, J. M. Suraci, Patricia Simmons, J H. Simmons, Georgia L. Harris
The Joe D. Simmons Memorial Scholarship fosters the furtherance of metrology through education by striving to: support the academic pursuit of a metrology career by worthy students; promote and improve measurement science education and educational

Nature of Transition Layers at the SiO 2 /SiC Interface

July 14, 2008
Author(s)
T Zheleva, Aivars Lelis, G Duscher, F Liu, Igor Levin, M Das
Electrical performance of SiC-based microelectronic devices is strongly affected by the densities of interfacial traps introduced by the chemical and structural changes at the SiO2/SiC interfaces during processing. We analyzed the structure and chemistry

PRACTICAL METHOD FOR MEASUREMENT OF AC-DRIVEN HIGH-POWER LEDS

July 14, 2008
Author(s)
Yuqin Zong, Yoshihiro Ohno, Pei-ting Chou
Alternating-current (AC) driven high-power LEDs are available and used in SSL products. AC LEDs operate directly from a mains supply and thus have advantages in simplifying product design, increasing product reliability, and extending product lifetime

Web Thermo Tables an On-Line Version of the TRC Thermodynamic Tables

July 14, 2008
Author(s)
Andrei F. Kazakov, Chris D. Muzny, Robert D. Chirico, Vladimir Diky, Michael D. Frenkel
It has long been understood that availability of thermophysical and thermochemical property data is vital to scientific research and industrial design. For over 65 years, the Thermodynamics Research Center (TRC) has been publishing tables of critically

Applications of highly coherent femtosecond fiber lasers

July 13, 2008
Author(s)
Nathan R. Newbury, Ian R. Coddington, William C. Swann
Coherent, broadband fiber lasers produce pulse trains with <1 femtosecond relative timing uncertainty and <1 mHz relative frequency uncertainty. These sources can advance many applications including optical frequency metrology, ranging LIDAR, and broadband

Complex micropatterning of periodic structures on elastomeric surfaces

July 10, 2008
Author(s)
Arnaud Chiche, Christopher Stafford, J Cabral
We report a simple methodology to fabricate complex sub-micron periodic structures in poly(dimethylsiloxane) over large surface areas (several cm2). Single-frequency, uni- and multi-axial sinusoidal surface modulations, with tunable amplitude and

Inverted spectra of single-wall carbon nanotube films

July 10, 2008
Author(s)
John H. Lehman, Katie Hurst, Lara Roberson, K. Nield, J. D. Hamlin
We present absolute measurements of reflectance and absorbance for a purified single wall carbon nanotube (SWCNT) film. The absorbance spectrum of a SWCNT-laminated pyroelectric detector for wavelengths 0.6 - 2 υm is inverted when compared to absorbance

Fiducial approach for assessing agreement between two instruments

July 9, 2008
Author(s)
Chih-Ming Wang, Hariharan K. Iyer
This paper presents an approach for making inferences about the intercept and the slope of a linear regression model with both variables subject to measurement errors. The approach is based on the principle of fiducial inference. A procedure is presented
Displaying 30801 - 30825 of 73929
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