Search Publications

NIST Authors in Bold

Displaying 15051 - 15075 of 17286

Density, Speed of Sound, and Viscosity Measurements of Reference Materials for Biofuels

February 10, 2012

Author(s)

Arno R. Laesecke, Tara J. Fortin, Jolene D. Splett

Measurements of density, speed of sound, and viscosity have been carried out on liquid standard reference materials for biofuels as a function of temperature at ambient pressure. The samples included anhydrous and hydrated bioethanol and two biodiesels

A Retrospective Analysis of Lessons Learned in Evaluating Advanced Military Technologies

December 30, 2011

Author(s)

Craig I. Schlenoff, Brian A. Weiss, Michelle P. Steves

… past six years, personnel from the National Institute of Standards and Technology (NIST) have served as the …

Impact Testing - Yesterday and Today

November 13, 2011

Author(s)

Enrico Lucon, Christopher N. McCowan

The Charpy impact test is a standardized high strain rate mechanical test which determines the amount of energy absorbed by a material during impact fracture. This test is widely applied in industry, since it is easy to prepare and conduct, and results can

Modeling Produces Insight into Fire Behavior

November 1, 2011

Author(s)

Adam M. Barowy, Daniel M. Madrzykowski

… The National Institute of Standards and Technology (NIST) is the leader in the …

Model Selection for Good Estimation and Prediction Over a User-Speci ed Covariate Distribution for Linear Models Under the Frequentist Paradigm

October 26, 2011

Author(s)

Adam L. Pintar

Model selection is an important part of estimation and prediction for linear models with multiple explanatory variables (covariates). A variety of approaches exist that focus on estimation of model parameters or the t of the model where data have been

Molecular-Crowding-Induced Clustering of DNA-Wrapped Carbon Nanotubes for Facile Length Fractionation

September 6, 2011

Author(s)

Constantine Y. Khripin, Nicholas A. Arnold-Medabalimi, Ming Zheng

Emerging applications require single-wall carbon nanotubes (SWCNTs) of welldefined length. Yet the use of length-defined SWCNTs is limited, in part due to the lack of an easily accessible materials preparation method. Here, we present a new strategy for

SURF III: A flexible Synchrotron Radiation Source for Radiometry and Research

September 1, 2011

Author(s)

Uwe Arp, Charles W. Clark, Lu Deng, Nadir S. Faradzhev, Alex P. Farrell, Mitchell L. Furst, Steven E. Grantham, Edward W. Hagley, Shannon B. Hill, Thomas B. Lucatorto, Ping-Shine Shaw, Charles S. Tarrio, Robert E. Vest

The calculability of synchrotron radiation (SR) makes electron storage rings wonderful light sources for radiometry. The broadband nature of SR allows coverage of the whole spectral region from the x-ray to the far-infrared. Compact low-energy storage

Constraints on Monopole-Dipole Interactions of Wisps from Polarized Gas Relaxation Time

August 31, 2011

Author(s)

Changbo Fu, Thomas R. Gentile, W M. Snow

Various theories beyond the Standard Model predict new particles with masses in the sub-eV range with very weak couplings to ordinary matter. A P-odd, T-odd, spin-dependent interaction between polarized and unpolarized matter is one such possibility. Such

CFD Simulations on Extinction of Co-Flow Diffusion Flames

June 19, 2011

Author(s)

Randall J. McDermott, Jukka Vaari, Jason E. Floyd

An improved flame extinguishing criterion is implemented to the Fire Dynamics Simulator (FDS) for gaseous suppressants under the lumped species model with transport-limited combustion (infinitely fast chemistry). The criterion considers the total enthalpy

Model Checking for Verification of Mandatory Access Control Models and Properties

February 28, 2011

Author(s)

Chung Tong Hu, David R. Kuhn, Tao Xie, J Hwang

Mandatory access control (MAC) mechanisms control which users or processes have access to which resources in a system. MAC policies are increasingly specified to facilitate managing and maintaining access control. However, the correct specification of the

A Comparison of Methods for Computing the Residual Resistivity Ratio of High-Purity Niobium

February 17, 2011

Author(s)

Jolene D. Splett, Dominic F. Vecchia, Loren F. Goodrich

We compare methods for estimating the residual resistivity ratio (RRR) of high-purity niobium samples and investigate the effects of using different functional models on the final value. RRR is typically defined as the ratio of the electrical resistances

Experimental Verification of Formulas For Variances of Plane Parameters Fitted to 3D Imaging Data

January 7, 2011

Author(s)

Marek Franaszek, Geraldine S. Cheok, Kamel S. Saidi

Nonlinear Least Squares method is applied to fit a plane to 3D imaging data. Two different error functions used in fitting are tested: orthogonal and directional. Variances of fitted parameters are calculated either from a single dataset using derived

Dynamic Properties for Modeling and Simulation of Machining: Effect of Pearlite to Austenite Phase Transition on Flow Stress in AISI 1075 Steel

January 3, 2011

Author(s)

Timothy J. Burns, Steven P. Mates, Richard L. Rhorer, Eric P. Whitenton, Debasis Basak

… Kolsky Bar Laboratory at the National Institute of Standards and Technology (NIST) has been developed for the …

Precise Throughput Determination of the PanSTARRS Telescope and the Gigapixel Imager using a Calibrated Silicon Photodiode and a Tunable Laser: Initial Results

December 2, 2010

Author(s)

Christopher W. Stubbs, Peter Doherty, Claire Cramer, Gautham Narayan, Yorke Brown, Ned Henry, Keith R. Lykke, John T. Woodward IV, John L. Tinry

… pixel in the instrument, without observations of celestial standards. We present promising initial results from this …

CRYOGENIC CURRENT COMPARATOR FOR THE MEASUREMENT OF ELECTRICAL RESISTANCE IN THE RANGE OF 10 kO} TO 1 GO}

October 29, 2010

Author(s)

Felipe Hernandez-Marquez, Randolph Elmquist, Benjamin Rodriguez

… in a collaboration between the National Institute of Standards and Technolgy (NIST) of the USA, the National …

Asymmetrically cut crystal pair as x-ray magnifier for imaging at high intensity laser facilities.

October 20, 2010

Author(s)

Lawrence T. Hudson, Albert Henins, C.I Szabo, Uri Feldman, John F. Seely, John J. Curry

… cut crystal pairs from the National Institute of Standards and Technology (NIST) built in a new enclosure for …

Workshop on Quantitative Tools for Condition Assessment of Aging Infrastructure

October 14, 2010

Author(s)

Ward L. Johnson, Thomas A. Siewert, Jessica Terry, Dat Duthinh, Mark Iadicola, William E. Luecke, Joseph D. McColskey

… by a team of researchers within the National Institute of Standards and Technology s (NIST) Materials Science and …

Epitaxial Graphene Electronic Structure And Transport

September 2, 2010

Author(s)

Joseph A. Stroscio, Walt A. de Heer, Claire Berger, Xiaosong Wu, Yike Hu, Ming Ruan, Phillip First, Robert Haddon, Benjamin Piot, Clement Faugeras, Marek Potemski

… of several device prototypes including resistance standards based on epitaxial graphene quantum Hall devices …

Frequentist coverage properties of uncertainty intervals for weak Poisson signals in the presence of background

February 3, 2010

Author(s)

Kevin J. Coakley, Jolene D. Splett, David S. Simons

We construct uncertainty intervals for weak Poisson signals in the presence of background. We consider the case where a primary experiment yields a realization of the signal plus background, and a second experiment yields a realization of the background

A Slow Atom Source using a Collimated Effusive Oven and a Single-Layer Variable Pitch Coil Zeeman Slower

January 22, 2010

Author(s)

Ian B. Spielman, Simon C. Bell, Mark D. Junker, Martijin Jasperse, Lincoln D. Turner, Yu-Ju Lin, Robert E. Scholten

We describe a simple slow atom source for loading a rubidium magneto-optical trap. The source includes an effusive oven with a long heated collimation tube. Almost all components are standard vacuum parts. The heating elements and thermocouples are

Low-Cost, High-Throughput, Automated Counting of Bacterial Colonies

January 5, 2010

Author(s)

Matthew L. Clarke, Robert L. Burton, A. N. Hill, Maritoni A. Litorja, Moon H. Nahm, Jeeseong Hwang

Research involving bacterial pathogens often requires enumeration of bacteria colonies. Here we present a low-cost, high-throughput colony counting system consisting of colony counting software and a consumer-grade digital camera or document scanner. We

Proceedings of the Privilege Management Workshop, September 1-3, 2009

January 1, 2010

Author(s)

Tanya L. Brewer, Annie W. Sokol, Sheldon A. Durrant

… terminology and concepts. The National Institute of Standards and Technology (NIST) and the National Security …

QOD Standalone Users Guide

December 16, 2009

Author(s)

Julien C. Cuvillier, Katherine C. Morris

… tools aid in producing high quality XML schemas using a standards-based approach to manufacturing systems …

Sample Preparation Protocols for Realization of Reproducible Characterization of Single-walled Carbon Nanotubes

December 1, 2009

Author(s)

Angela R. Hight Walker, Jeffrey A. Fagan, Stephanie A. Hooker, Michael T. Postek, Stephen A. Wise, Andras Vladar, Rolf L. Zeisler

Harmonized sample pre-treatment is an integral first step in ensuring metrological quality of measurements as regards repeatability, inter-laboratory reproducibility and commutability. The development of standard preparation methods for SWCNT samples is

Thermodynamic Properties of Propane. II. Molar Heat Capacity at Constant Volume from 85 K to 345 K with Pressures to 35 MPa

November 23, 2009

Author(s)

Richard A. Perkins, Jesus C. Sanchez Ochoa, Joe W. Magee

Molar heat capacities at constant volume (C v) were measured with an adiabatic calorimeter for pure propane. The high purity of the samples was verified by chemical analysis. Temperatures ranged from the triple point of propane near 85 K to the upper

Advanced communications
-Open Radio Access Network (Open-RAN)
-Quantum communications
-Spectrum sharing
-Wireless (RF)
Artificial intelligence
-AI measurement and evaluation
-Autonomous systems
--Automated vehicles
--Autonomous laboratories
-Applied AI
-Fundamental AI
-Hardware for AI
-Machine learning
-Trustworthy and responsible AI
Bioscience
-Bioeconomy
--Biological data
-Bioimaging
-Bioinformatics
-Biomanufacturing
-Biomaterials
-Biometrology
-Biosecurity
--Biosurveillance
--Genomic cybersecurity
--Nucleic acid sequence screening
-Cell measurements
-Engineering / synthetic biology
--Biofabrication
--Cell-free systems
--Genome engineering
--Protein engineering
-Gene delivery systems
-Genome editing
-Genomics
-Glycomics
-Metabolomics
-Microbial measurements
-Proteomics
Buildings and Construction
-Building codes and standards
-Building control systems
-Building damage and repair
-Building economics
-Building materials
-Energy efficiency
-Heating, ventilation and air conditioning equipment
-Indoor air quality
-Structural engineering
-Thermal comfort
Chemistry
-Analytical chemistry
-Chemical engineering and processing
-Chemical thermodynamics and chemical properties
-Molecular characterization
-Theoretical chemistry and modeling
-Thermochemical properties
Electronics
-Electromagnetics
-Flexible electronics
-Magnetoelectronics
-Optoelectronics
-Organic electronics
-Semiconductors
-Sensors
-Superconducting electronics
Energy
-Alternative energy
-Conventional energy
-Electric power / smart grid
-Fuels
Environment
-Air / water / soil quality
-Climate Measurements
-Environmental health
-Greenhouse gas measurements
-Marine science
-Sustainability
Fire
-Fire detection
-Fire dynamics and science
-Fire fighting
-Fire modeling
-Fire risk reduction
-Materials flammability
-Structural fire resistance
-Wildland urban interface fire
Forensic Science
-Digital evidence
-Drugs and toxicology
-Firearms and toolmarks
-Forensic biometrics
-Forensic genetics
-Trace evidence
Health
-Biopharmaceuticals
-Cell and gene therapy
-Clinical diagnostics
--Cancer
--Medical imaging
-Food and nutrition
-Human microbiome
-Precision medicine
-Regenerative medicine and advanced therapy
--Flow cytometry
Information technology
-Biometrics
-Cloud computing and virtualization
-Complex systems
-Computational science
-Conformance testing
-Cyber-physical systems
--Smart cities
-Cybersecurity and privacy
--Cryptography
--Cybersecurity education and workforce development
--Cybersecurity measurement
--Identity and access management
--Privacy engineering
--Risk management
--Securing emerging technologies
--Trustworthy networks
--Trustworthy platforms
-Data and informatics
--Human language technology
--Information retrieval
--Natural language processing
-Digital twins
-Federal information processing standards (FIPS)
-Health IT
-Internet of Things (IoT)
-Interoperability testing
-Location based services
-Mobile
-Networking
--Mobile and wireless networking
--Network management and monitoring
--Network modeling and analysis
--Network security and robustness
--Network test and measurement
--Next generation networks
--Protocol design and standardization
--Software defined and virtual networks
-Software research
--Software testing
-Usability and human factors
--Accessibility
-Video analytics
-Virtual / augmented reality
-Visualization research
-Voting systems
Infrastructure
Manufacturing
-Additive manufacturing
-Factory communications
-Factory operations planning and control
-Interoperability in manufacturing
-Machining
-Manufacturing economics
-Manufacturing quality assurance
-Manufacturing systems design and analysis
-Monitoring, diagnostics and prognostics
-Process improvement
-Process measurement and control
-Product data
-Robotics
--Agility and adaptability
--Collaborative robots
--Dexterous grasping
--Manipulation
--Mobility and industrial autonomous vehicles
--Navigation / actuation / control
--Sensing and perception
-Supply chain
-Sustainable manufacturing
-Systems engineering
-Systems integration
-Technology commercialization
Materials
-Ceramics
-Composites
-Concrete / cement
-Materials characterization
--Composition and structure
--Mechanical properties
--Thermal properties
-Metals
-Modeling and computational material science
-Polymers
-Superconductors
Mathematics and statistics
-Experiment design
-Image and signal processing
-Modeling and simulation research
-Numerical methods and software
-Statistical analysis
-Uncertainty quantification
Metrology
-Amount of substance
-Dimensional metrology
-Electrical / electromagnetic metrology
-Flow metrology and rheology
-Force metrology
-Humidity metrology
-Ionizing radiation metrology
-Mass metrology
-Metric
-Optical / photometry / laser metrology
-Pressure and vacuum metrology
-Thermometry metrology
-Time and frequency metrology
-Weights and measures
Nanotechnology
-Nanobiotechnology
-Nanochemistry
-Nanoelectronics
-Nanofabrication / manufacturing
--Lithography
--Self-assembly
-Nanofluidics
-Nanomagnetics
-Nanomaterials
-Nanomechanics
-Nanometrology
-Nanophotonics
-Nanophysics
-Nanoplasmonics
Neutron research
Performance excellence
-Assessment tools and services
-Baldrige award
-Baldrige examiners
-Baldrige Framework and Criteria
-Best practices
-Leadership development
Physics
-Atomic / molecular / quantum
-Biological physics
-Condensed matter
-Electron physics
-Magnetics
-Nuclear physics
-Optical physics and communications
-Quantum information science
-Radiation
-Spectroscopy
-Thermodynamics
-Time and frequency
Public safety
-Chemical / Biological / Radiological / Nuclear / Explosives (CBRNE)
-First responder preparedness
-Law enforcement
-Public safety communications research
-Response robots
Resilience
-Community resilience
--Recovery
--Resilience metrics
-Disaster and failure studies
-Earthquake risk reduction
-Resilience economics
-Resilient materials
-Windstorm impact reduction
Standards
-Accreditation
-Calibration services
-Conformity assessment
-Documentary standards
-Frameworks
-Quality assurance
-Reference data
-Reference instruments
-Reference materials
-Standards education
Technology transfer
Transportation
-Aerospace
-Automotive