U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 30076 - 30100 of 73929

North American Quality System Registration Organizations (NAQSRO)

October 16, 2008
Author(s)
M E. Squires
The Semi-Annual Listing of North American Quality System Registration Organizations (NAQSRO)provides information on organizations that have informed NIST about their quality system registration according to the ASQ Q9000 series, QS-9000, ISO 14000 (EMS) or

Obituary: Jules Zeiser Klose

October 16, 2008
Author(s)
William R. Ott
Jules Zeiser Klose, 77, an atomic physicist at the National Bureau of Standards (NBS) and the National Institute of Standards and Technology (NIST), died Sunday, August 8, 2004 at the Annapolitan Care Center in Annapolis MD following a lengthy illness and

Observation of Persistent Flow of a Bose-Einstein Condensate in a Toroidal Trap

October 16, 2008
Author(s)
Changhyun Ryu, Mikkel Andersen, Pierre Clade, Vasant Natarajan, Kristian Helmerson, William D. Phillips
We have observed the persistent flow of Bose-condensed atoms in a toroidal trap. The flow persists without decay for up to 10 s, limited only by experimental factors such as drift and trap lifetime. The quantized rotation was initiated by transferring one

Observation of Polarization-Locked Vector Solitons in Optical Fiber

October 16, 2008
Author(s)
S T. Cundiff, B C. Collins, N N. Akhmediev, J M. Soto-Crespo, K Bergman, W H. Knox
We observe the formation of polarization-locked vector solitons in a modelocked fiber laser. Temporal vector solitons contain components along both principal axes of the birefringent laser cavity. The relative phase of the two components is locked to a

Observation of Soliton Explosions

October 16, 2008
Author(s)
S T. Cundiff, J M. Soto-Crespo, N N. Akhmediev
We show, experimentally and numerically, that Ti: sapphire mode-locked lasers can operate in a regime in which they produce exploding solitons. This happens when the laser operates near a critical point. Explosions occur intermittently. They happen

OH stretch overtone spectroscopy and transition dipole slignment of HOD

October 16, 2008
Author(s)
David Nesbitt, J R. Fair, O Votava
Photoscoustic spectroscopy in room-temperature H 2O/HOD/D 2O cells has been used to probe the 3v OH and 4v OH overtone bands in HOD via excitation with a single mode (160 MHz) injection-seeded optical parametric oscillator (OPO) and pulsed dye laser

On the Detection of Rare, and Moderately Rare Nuclear Events

October 16, 2008
Author(s)
Lloyd A. Currie
Some of the more important developments in science and practical demands in commerce have been linked to attempts to detect rare events and rare contaminants, ranging from the early counting of solar neutrinos to the occurrence of dodder seeds in clover

On the Existence and Stability of Quadrijunctions

October 16, 2008
Author(s)
John W. Cahn, E S. Vanleck
The existence and stability of various microstructural features for two-phase materials with anisotropic energies is discussed. In particular, the existence of quadri and tri-junctions for energies with different symmetry properties is examined. An Ising

On-Line Process Control

October 16, 2008
Author(s)
Raghu N. Kacker, Nien-Fan Zhang
The natural state of manufacturing and measurement processes is usually nonstationary. The methods of statistical process control (SPC) are therefore inappropriate for on-line control. This paper provides a simple and generic protocol for on-line control

One Dimensional Modeling and Learning

October 16, 2008
Author(s)
J E. Devaney
This paper introduces four new algorithms, the M-algorithm, the L-algorithm, the S-algorithm and the T-algorithm, which enable recognition of distributional functions without doing a fit of the data to the distribution. These algorithms workbest for large

Opportunities for Development of Reference Materials for Beryllium

October 16, 2008
Author(s)
Robert Watters, Aleksander B. Stefaniak, Mark D. Hoover
Reference materials provide the foundation for assessment of analytical chemistry methods, accurate quantification of occupational and environmental exposures, and conduct of in vitro and in vivo toxicology studies for health effects research. Currently

Optical Frequency Combs: From Frequency Metrology to Optical Phase Control

October 16, 2008
Author(s)
Jun Ye, H Schnatz, Leo W. Hollberg
A remarkable synergy between traditionally CW laser-based precision optical frequency metrology and mode-locked ultrafast lasers has led to precision control of the frequency spectrum produced by mode-locked lasers. Such a phase - controlled mode-locked

Optical Frequency Standards and Their Measurement

October 16, 2008
Author(s)
John L. Hall, Jun Ye
The last four years have seen a revolution in the art and practice of optical frequency measurement. Indeed the gearbox represented by the spectrally-broadened fs laser's comb has sufficiently low noise that we in the optics community have abruptly found

Optical frequency standards: Progress and applications

October 16, 2008
Author(s)
John L. Hall, Jun Ye, L -. Ma, K R. Vogel, Tim P. Dinneen
A number of individual small advances, taken together, bring us to the beginning of a new domain of optical frequency stability, reproducibility, and measurements. Particular advances include the refinment of Noise-Immune Cavity-Enhanced Optical Heterodyne

Optical Properties of Amphibole Asbestos

October 16, 2008
Author(s)
Jennifer R. Verkouteren, A G. Wylie
The fibrillar growth habit and 100} twinning may produce anomalous optical properties in fibrous amphiboles. The optical properties of 16 fibrous tremolite, actinolite, and ferro-actinolite samples from Verkouteren and Wylie (2000) are described. One

Optical Thermometry of Semiconductor Processing Plasmas

October 16, 2008
Author(s)
Eric C. Benck
Temperatures within semiconductor processing plasmas are important since they control the various reaction rates of the plasma and consequentially can significantly influence the rate and quality of etching or deposition. The nonequilibrium nature of these

Organizing Self-Assembled Porphyrin Arrays on Metal and Glass Surfaces

October 16, 2008
Author(s)
J Batteas, J C. Garno, Charles M. Drain, G Smeureanu, T Milic
Herein we report an investigation of the surface organization of tetrameric arrays of porphyrins self-assembled by metal ion coordination to exocyclic pyridyl ligands. Four supramolecular porphyrinic squares were made to investigate the commingled roles of

Origin of Discrepancies in Inelastic Electron Tunneling Spectra ofMolecular Junctions

October 16, 2008
Author(s)
Lam H. Yu, Christopher D. Zangmeister, James G. Kushmerick
We report inelastic electron tunneling spectroscopy (IETS) of multilayer molecular junctions with and without incorporated metal nano-particles. The incorporation of metal nanoparticles into our devices leads to enhanced IET intensity and a modified line
Displaying 30076 - 30100 of 73929
Was this page helpful?