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Journal of Research (NIST JRES)

Variances of Cylinder Parameters Fitted to Range Data

September 26, 2012

Author(s)

Marek Franaszek

Industrial pipelines are frequently scanned with 3D imaging systems (e.g., LADAR) and cylinders are fitted to the collected data. Then, the fitted as-built

Sealed Gravitational Capillary Viscometry of Dimethyl Ether and Two Next-Generation Refrigerants

September 26, 2012

Author(s)

Dylan S. Cousins, Arno D. Laesecke

The viscosity of dimethyl ether (DME, C2H6O) and of the fluorinated propene isomers 2,3,3,3- tetrafluoroprop-1-ene (R1234yf, C3H2F4) and trans-1,3,3,3

Measurement of Scattering Cross Section with a Spectrophotometer with an Integrating Sphere Detector

September 13, 2012

Author(s)

Lili Wang, Steven J. Choquette, Yu-Zhong Zhang, Victoria Karpiak, Adolfas Gaigalas

A commercial spectrometer with an integrating sphere (IS) detector was used to measure the scattering cross section of microspheres. Analysis of the measurement

Lunar Spectral Irradiance and radiance (LUSI): new instrumentation to characterize the Moon as a space-based radiometric standard

July 17, 2012

Author(s)

Allan W. Smith, Steven R. Lorentz, Raju V. Datla, Thomas C. Stone

The need to understand and monitor climate change has led to proposed radiometric accuracy requirements for space-based remote-sensing instruments that are very

Computational Seebeck Coefficient Measurement Simulations

May 2, 2012

Author(s)

Joshua B. Martin

We have employed finite element analysis to develop computational Seebeck coefficient metrology simulations. This approach enables a unique exploration of

Instrument Control (iC) -- an open-source software to automate test equipment

May 1, 2012

Author(s)

Kurt Pernstich

It has become common practice to automate data acquisition from programmable instrumentation and a range of different software solutions fulfill this task. Many

A Comparison of Harwell & FWT Alanine Temperature Coefficients for 25 °C to 80 °C

May 1, 2012

Author(s)

Marc F. Desrosiers, Anne M. Forney, James M. Puhl

Dosimeters used to monitor industrial irradiation processing commonly experience significant temperature rises that must be considered in the dose analysis

Measurements for the Development of Simulated Naturally Occurring Radioactive Materials

April 3, 2012

Author(s)

Leticia S. Pibida

Nineteen different commercially available samples containing naturally occurring radioactive materials (NORM) (i.e., natural uranium, thorium, radium and

The Effect of Non-equispaced Sampling Instants, Sub-period Record Epochs, and Timebase Gain on the Information Content of Discredized Replicas of Periodic Signals

March 15, 2012

Author(s)

Nicholas G. Paulter Jr.

The effect of non-equispaced sampling instants and timebase gain on the information content of the discretized replica of a period signal is examined. The

Fractional Diffusion, Low Exponent Levy Stable Laws, and Slow Motion Denoising of Helium Ion Microscope Nanoscale Imagery

February 22, 2012

Author(s)

Andras Vladar, Alfred S. Carasso

Helium ion microscopes (HIM) are capable of acquiring images with better than 1nm resolution, and HIM images are particularly rich in morphological surface

The Interaction of Radio-Frequency Fields with Materials at Macroscopic to Mesoscopic Sales

February 2, 2012

Author(s)

James R. Baker-Jarvis, Sung Kim

The goal of this paper is to overview radio-frequency electromagnetic interactions with solid and liquid dielectric and magnetic materials from the macroscale

Standardization of Broadband UV Measurements for 365 nm LED Sources

February 2, 2012

Author(s)

George P. Eppeldauer

Broadband UV measurements are analyzed when UV-A irradiance meters measure optical radiation from 365-nm sources. The CIE standardized rectangular-shape UV-A

NIST Ionization Chamber "A" Sample-Height Corrections

February 2, 2012

Author(s)

Ryan P. Fitzgerald

For over 30 years scientists in the NIST radioactivity group have been using their ionization chamber A to make measurements of radioactivity and radioactive

Double-Focusing Thermal Triple-Axis Spectrometer at the NCNR

February 2, 2012

Author(s)

Y. Chen, Sung Chang, Yang Zhao, Songxue Chi, William D. Ratcliff, B. G. Ueland, Ross Erwin

The new thermal triple-axis spectrometer at the NIST Center for Neutron Research (NCNR) is located at the BT-7 beam port. The 165 mm diameter reactor beam is

MICROHOTPLATE TEMPERATURE SENSOR CALIBRATION AND BIST

January 3, 2012

Author(s)

Muhammad Y. Afridi, Christopher B. Montgomery, Stephen Semancik, Kenneth G. Kreider, Jon C. Geist

In this paper we describe a novel long-term microhotplate temperature sensor calibration technique suitable for Built-In Self Test (BIST). The microhotplate

Long-term Stability of the NIST Conical Reference Transducer

December 22, 2011

Author(s)

Steven E. Fick, Thomas M. Proctor

The National Institute of Standards and Technology (NIST) Conical Reference Transducer (CRT) is designed for purposes which require frequency response

Combining Results from Multiple Evaluations of the Same Measurand

December 1, 2011

Author(s)

Raghu N. Kacker, Klaus-Dieter Sommer

According to the Guide to the Expression of Uncertainty in Measurement (GUM), a result of measurement consists of a measured value together with its associated

Findings and Recommendations from the Joint NIST AGA Workshop on Odor Masking

November 1, 2011

Author(s)

Thomas J. Bruno, Nancy Rawson, Ali Quaraishi

Since the days of the alchemist, the observation that some substances have a smell while other substances do not has been a source of fascination. The sense of

COMPARISON OF TWO DIMENSION-REDUCTION METHODS FOR NETWORK SIMULATION MODELS

October 5, 2011

Author(s)

Kevin L. Mills, James J. Filliben

Experimenters characterize the behavior of simulation models for data communications networks by measuring multiple responses under selected parameter

New Measurement Service for Determining Pressure Sensitivity of Type LS2aP Microphones by the Reciprocity Method

October 1, 2011

Author(s)

Randall P. Wagner, Victor Nedzelnitsky, Steven E. Fick

A new NIST measurement service has been developed for determining the pressure sensitivities of American National Standards Institute and International

Improved First-Principles Calculation of the Third Virial Coefficient of Helium

August 31, 2011

Author(s)

Giovanni Garberoglio, Michael R. Moldover, Allan H. Harvey

We employ state-of-the-art pair and three-body potentials for helium to calculate its third density virial coefficient C(T) with uncertainties much smaller than

Atomic Force Microscope Cantilever Flexural Stiffness Calibration: Toward a Standard Traceable Method

July 1, 2011

Author(s)

Richard S. Gates, Mark Reitsma, John A. Kramar, Jon R. Pratt

The evolution of the atomic force microscope into a useful tool for measuring mechanical properties of surfaces at the nanoscale has spurred the need for more

Vacuum technology considerations for mass metrology

July 1, 2011

Author(s)

Patrick J. Abbott, Zeina J. Kubarych

Vacuum weighing of mass artifacts eliminates the necessity of air buoyancy correction and its contribution to the measurement uncertainty. Vacuum weighing is

Development of Multicolor Flow Cytometry Standards: Assignment of Equivalent Reference Fluorophores (ERF) Unit

June 20, 2011

Author(s)

Lili Wang, Adolfas K. Gaigalas

A procedure is described for assigning values of the number of equivalent reference fluorophores (ERF) to microspheres labeled with a fluorophore designed to

Electromagnetic Metrology on Concrete and Corrosion

June 1, 2011

Author(s)

Sung Kim, Jack T. Surek, James R. Baker-Jarvis

To go beyond current electromagnetic nondestructive evaluation (NDE) methods for reinforcing bar (rebar) corrosion we are exploring unique magnetic or electric

Tumor volume measurement errors RECIST studied with realistic tumor models

May 16, 2011

Author(s)

Benjamin R. Galloway, Adele Peskin, Zachary H. Levine

RECIST (Response Evaluation Criteria in Solid Tumors) is a linear measure intended to predict tumor volume in medical computed tomography (CT). In this work

Re-optimized energy levels and Ritz wavelengths of 198Hg I

May 10, 2011

Author(s)

Alexander Kramida

Energy levels and observed spectral lines of 198Hg I were recently compiled at the National Institute of Standards and Technology (NIST) [E. B. Saloman, J. Phys

Selecting Valid Correlation Areas for Automated Bullet Identification Systems Based on Striation Detection

May 1, 2011

Author(s)

Wei Chu, Jun-Feng Song, Theodore V. Vorburger, Robert M. Thompson, Richard M. Silver

Geometric effects when measuring small holes with micro contact probes.

March 1, 2011

Author(s)

Jack A. Stone Jr., Balasubramanian Muralikrishnan, Chittaranjan Sahay

A coordinate measuring machine with a suitably small probe can be used to measure micro-features such as the diameter and form of small holes (often about 100

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