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NIST Authors in Bold

Displaying 34651 - 34675 of 73697

High-Contrast CPT Resonances

February 7, 2006
Author(s)
John E. Kitching
The performance of an atomic clock or magnetometer based on CPT is determined by the resonance width and the signal-to-noise ratio. In particular, a large signal amplitude results in a high stability for a clock or a high sensitivity for a magnetometer

Local Structures and Raman Spectra in the Ca(Zr,Ti)O 3 Perovskite Solid Solutions

February 7, 2006
Author(s)
Igor Levin, Eric J. Cockayne, M W. Lufaso, Joseph C. Woicik, James E. Maslar
Local structures and cation distributions in perovskite Ca(Zr, Ti)O3 solid solutions were analyzed using X-ray absorption fine structure and pair-distribution functions obtained from total neutron scattering. The analyses revealed that the Zr-O and Ti-O

Dynamic Simulation and Modeling of a Road Vehicle

February 2, 2006
Author(s)
Tsung-Ming Tsai
Automated driving of road vehicles needs to use a simulation environment to develop control programs. A vehicle dynamic simulation program was implemented into a computer system. It contains a vehicle dynamic model that models all essential parts of a

Biometrics Standards ? Rising to the Challenge of Technology Innovation

February 1, 2006
Author(s)
Fernando L. Podio
For decades, biometric technologies were primarily used in law enforcement applications. Currently, they are increasingly being required in multiple public and private sector applications worldwide to authenticate a person?s identity, secure national

CCQM-K13.1 Subsequent Key Comparison: Cadmium and Lead in Sediment

February 1, 2006
Author(s)
Robert R. Greenberg
CCQM-K13.1 is a Subsequent Key Comparison for Cadmium and Lead in Sediment conducted to provide the opportunity for two NMIs to demonstrate and document improvements in measurement capability achieved since the conduct of CCQM-K13, Amount content of

CCQM-K31 Key Comparison: Arsenic in Shellfish

February 1, 2006
Author(s)
Robert R. Greenberg, Elizabeth A. Mackey
A Key Comparison (CCQM-K31) of the determination of arsenic in a marine shellfish (oyster tissue) was conducted under the auspices of the CCQM Inorganic Analysis Working Group as a follow-up to the CCQM-P11 Pilot Study. Arsenic was present at naturally

Comment on the Paper Metrologia 42 49-57 (2005) by K. Szymaniec et al,

February 1, 2006
Author(s)
Steven R. Jefferts, F Levi
A recent evaluation of the accuracy of National Physical Laboratory (NPL) primary frequency standard NPL CsF1 gives an overall frequency uncertainty of δŅ/Ņ 0 = 1 × 10 -15. This stated uncertainty includes a correction of a frequency bias of δŅ/Ņ 0 = 8 ×

Comparison between frequency standards in Europe and the USA at the 10 -15 uncertainty level

February 1, 2006
Author(s)
Joseph Achkar, Andreas Bauch, R Dach, R Hlavac, Luca Lorini, Thomas E. Parker, G. Petit, Dirk Piester, P Uhrich, K Szymaniec
Istituto Elettrotecnico Nazionale Galileo Ferraris (IEN), National Institute of Standards and Technology (NIST), National Physical Laboratory (NPL), Laboratoire National de Metrologie et de Essais?Observatoire de Paris/Systemes de Reference Temps Espace

Comparison of scanning capacitance microscopy and scanning Kelvin probe microscopy in determining two-dimensional doping profiles of Si homostructures

February 1, 2006
Author(s)
Seong-Eun Park, Nhan V. Nguyen, Joseph J. Kopanski, John S. Suehle, Eric M. Vogel
Two-dimensional (2-D) doping profiles of differently doped Si homostructures were investigated by scanning capacitance microscopy (SCM) and scanning Kelvin probe microscopy (SKPM). The calibrated doping concentration of the n-step Si layers was in the

Computer Security Division 2005 Annual Report

February 1, 2006
Author(s)
Tanya L. Brewer, Matthew A. Scholl
This report covers the work conducted within the National Institute of Standards and Technology's Computer Security Division during the Fiscal Year 2005. It discusses all projects and programs within the Division, staff highlights, and publications. For

Consistency of D 13 C Measurements Improved

February 1, 2006
Author(s)
T B. Copelen, W Brand, M Gehre, M Groening, HAJ Meijer, Blaza Toman, R. Michael Verkouteren
We present state-of-the-art measurements and data evaluation methods to show that the consistency of carbon isotope ratio measurements can be improved 39 % to 47 % by anchoring the measurement scale with two isotopic reference materials differing in carbon

Determination of Polybrominated Diphenyl Ethers in Indoor Dust Standard Reference Materials

February 1, 2006
Author(s)
H M. Stapleton, T. Harner, M. Shoeib, Jennifer M. Lynch, Michele M. Schantz, Stefan D. Leigh, Stephen A. Wise
Polybrominated diphenyl ethers (PBDEs) have been measured for the first time in three different indoor dust Standard Reference Materials (SRMs) prepared by the National Institute of Standards and Technology (NIST). Two of these SRMs (2583 and 2584) have

Energy Levels of 4f3 in the Free Nd3+ Ion From Emission Spectra

February 1, 2006
Author(s)
J-F Wyart, Ali Meftah, Annik Bachelier, Jocelyne Sinzelle, Wan-U Lydia Tchang-Brillet, Norbert Champion, Nissan Spector, J Sugar
The emission spectrum of neodymium produced by vacuum spark sources was observed in the vacuum ultraviolet on two normal-incidence spectrographs. In an initial result, more than 550 lines have been identified as transitions from 85 4f25d levels to 37
Displaying 34651 - 34675 of 73697
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