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 40376 - 40400 of 73960

NIST Research Library Exhibits Treasures of Metric History

November 1, 2003
Author(s)
H Hassler
In celebration of National Metric Week (October 6-10, 2003), the NIST Research Library launched a new exhibit featuring important works on the history of the metric system that are part of the Library's Historical Book Collection. Works featured include

NIST XML Simulation Interface Specification at Boeing: A Case Study

November 1, 2003
Author(s)
R F. Lu, Guixiu Qiao, Frank H. Riddick, Charles R. McLean
Efficient and consistent simulation data management is indispensable and a challenging problem to be solved in modeling manufacturing and business processes. An extensible markup language (XML) based simulation interface specification is being developed by

On the Interaction of a Liquid Droplet with a Pool of Hot Cooking Oil

November 1, 2003
Author(s)
Samuel L. Manzello, Jiann C. Yang, Thomas G. Cleary
An experimental study is presented for distilled water droplets impacting on a heated pool of cooking oil. The impaction process was recorded using a high-speed digital camera at 1000 frames per second. The initial droplet diameter was fixed at 3.1+0.1 mm

Optical Photomask CD Metrology at NIST

November 1, 2003
Author(s)
James E. Potzick
Our customers usually measure mask features in order to make a business decision, such as whether or not to ship a mask to a customer. A simple cost/benefit model for mask CD metrology shows there is an optimum measurement uncertainty which will maximize

Phase Equilibria, Crystal Structures, and Dielectric Anomaly in the BaZrO 3 -CaZrO 3 System

November 1, 2003
Author(s)
Igor Levin, T G. Amos, S M. Bell, L Farber, Robert S. Roth, Terrell A. Vanderah, B H. Toby
Phase equilibria in the (1-x)BaZrO 3-xCaZrO 3 system were analyzed using a combination of X-ray and neutron powder diffraction, and transmission electron microscopy. The proposed phase diagram features two extended two-phase fields containing mixtures of a

Polymer-derived SiCN composites with magnetic properties

November 1, 2003
Author(s)
Atanu Saha, Sandeep R. Shah, Rishi Raj, Stephen E. Russek
Composites consisting of particles of α-iron dispersed in silicon carbonitride (SiCN) were fabricated by a polymer route. The composites had iron inclusions with the same magnetization as bulk iron, but they resisted oxidation up to 500°C and had a

Premixed Calcium Phosphate Cement Pastes

November 1, 2003
Author(s)
Shozo Takagi, Laurence C. Chow, S Hirayama, A Sugawara
A self-hardening calcium phosphate cement (CPC-I), consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA), has been shown in clinical studies to be efficacious as bone repair materials. The hardening time (HT) of the cement is

PVTx and Isochoric Heat Capacity Measurements for Aqueous Methanol Solutions

November 1, 2003
Author(s)
M M. Aliev, Joe W. Magee, I M. Abdulagatov
Isochoric heat capacity and PVTx properties of an aqueous methanol solution (050 mass fraction or 0.36 mol fraction of methanol) were measured in the liquid phase with a twin-cell adiabatic calometer. Temperatures ranged from 333 K to 422 K, and pressures

Simulation of an Austenite-Twinned-Martensite Interface

November 1, 2003
Author(s)
Anthony J. Kearsley, L A. Melara
Developing numerical methods for predicting microstructure in materials is an extremely large and important research area. Two examples of material microstructures are Austenite and Martensite. Austenite is a microscopic phase with simple crystallographic

Small Angle X-Ray Scattering for Sub-100 nm Pattern Characterization

November 1, 2003
Author(s)
Ronald L. Jones, T Hu, Eric K. Lin, Wen-Li Wu, R Kolb, D Casa, P J. Bolton, G G. Barclay
The characterization of sub-100 nm photolithographic patterns with nanometer scale resolution is demonstrated using Small Angle X-ray Scattering (SAXS). The transmission scattering geometry employed is capable of high throughput measurements with

Specular Baffle for Improved Infrared Integrating Sphere Performance.

November 1, 2003
Author(s)
Leonard M. Hanssen, A Prokhorov, V B. Khromchenko
Baffles are often placed in integrating spheres to accommodate the non-ideal aspects of other sphere components. These include detectors, sources, sphere wall surface shape and coatings. Baffles intentionally prevent light interchange between these and

The Advanced Angle Metrology System at NIST

November 1, 2003
Author(s)
Jack A. Stone Jr.
At the National Institute of Standards and Technology, our best capability for angle measurement is our Advanced Automated Master Angle Calibration System (AAMACS). This instrument is based on a triple-stack of indexing tables, used in conjunction with

The Viscosity of Seven Gases Measured with a Greenspan Viscometer

November 1, 2003
Author(s)
John J. Hurly, Keith A. Gillis, J B. Mehl, Michael R. Moldover
We determined the viscosity of seven gases (Ar, CH4, C3H8, N2, SF6, CF4, C2F6) by interpreting frequency-response data from a Greenspan acoustic viscometer with a detailed model developed by Gillis, Mehl, and Moldover. The model contains a parameter er

Thermodynamics of the Hydrolysis Reactions of Adenosine 3', 5'-(Cyclic)phosphate(aq) and Phosphoenolpyruvate(aq); the Standard Molar Formation Properties of 3',5'-(Cyclic)Phosphate(aq) and Phosphoenolpyruvate(aq)

November 1, 2003
Author(s)
Robert N. Goldberg, Yadu D. Tewari
Molar calorimetric enthalpy changes DrHm(cal) have been measured for the biochemical reactions1 {ATP(aq) = cAMP(aq) + pyrophosphate(aq)} and {cAMP(aq) + H2O(l) = AMP(aq)}. The reactions were catalyzed, respectively, by adenosine 3',5'-(cyclic)phosphate and

Trends in Firefighter Fatalities Due to Structural Collapse, 1979-2002

November 1, 2003
Author(s)
L D. Brassell, D D. Evans
Between the years 1979 and 2002 there were over 180 firefighter fatalities due to structural collapse, not including those firefighters lost in 2001 in the collapse of the World Trade Center Twin Towers. Structural collapse is an insidious problem within

Understanding Self-Healing in Service-Discovery Systems

November 1, 2003
Author(s)
Christopher E. Dabrowski, Kevin L. Mills
Service-discovery systems aim to provide consistent views of distributed components under varying network conditions. To achieve this aim, designers rely upon a variety of self-healing strategies, including: architecture and topology, failure-detection and

Volumetric Gas Flow Standard with Uncertainty of 0.02% to 0.05%

November 1, 2003
Author(s)
John D. Wright, Michael R. Moldover, Aaron N. Johnson, A Mizuno
A new pressure, volume, temperature, and time (PVTt) primary gas flow standard for calibrating flowmeters has an expanded uncertainty (k = 2) of between 0.02% and 0.05%. The standard diverts a steady flow into a collection tank of known volume during a
Displaying 40376 - 40400 of 73960
Was this page helpful?