CONTENTdm Title

Richard P. Reed
RICHARD P. REED Inducted: 1995 Citation: For leadership in cryogenic materials research and fracture mechanics metals Tenure: 1956‑1990 Birth: 1934, Hammond, Indiana Education: Purdue University, BS (Metallurgy), 1956 University of Colorado,...
NIST Gallery of Distinguished Scientists, Engineers, and Administrators

RECIST Applied to Realistic Tumor Models
RECIST; tumor size; volumetric measurement; x-ray imaging
Levine RECIST (Response Evaluation Criteria in Solid Tumors) is a linear measure intended to predict tumor size in medical computed tomography (CT). In this work, using purely geometrical considerations, we estimate how well RECIST can predict the...
Journal of Research of NIST and Predecessor Publications

Sage Direct Reading Ohmmeter
This meter was purchased by the Bureau of Safety of the Interstate Commerce Commission in 1915, and used for testing circuits in railroad signal and automatic train control systems. After the tests were completed and discontinued, the Commission...
NIST Museum Artifacts

Comparison of calibration methods for tristimulus colorimeters
radiometry colorimetry; tristimulus colorimeter; uncertainty
Uncertainties in source color measurements with a tristimulus colorimeter are estimated for calibration factors determined, based on a known source spectral distribution or on accurate measurements of the spectral responsivities of the colorimeter...
Journal of Research of NIST and Predecessor Publications

Radio-wave scattering by tropospheric irregularities
radio-wave scattering, tropospheric irregularities, electromagnetic propagation, Fourier, turbulent irregularities, amplitude, Gauss
The subject of radio-wave scattering by turbulent irregularities in the tropospheric index of refraction is reviewed. Descriptions of the turbulent medium are considered first, together with a status report on physical theories for the spectrum of...
Journal of Research of NIST and Predecessor Publications

$Radio-refractive-index climate near the ground$
Radio-refractive-index climate near the ground
radio refractive index, climate, altitude dependence, exponential function of height, contours, humidity, rays
The radio refractive index of air is a function of atmospheric pressure, temperature, and humidity and is found to vary in a systematic fashion with climate. It was found that the surface value of the refractive index may be estimated four to five...
Journal of Research of NIST and Predecessor Publications

Equations for the Radiofrequency Magnetic Permeameter
radio frequency, permeameter, T-network, q-meter measurement
The rf permeameter is an impedance transformer for measuring toroidal-shaped magnetic materials at radiofrequencies. Several equations already exist for calculating permeability (µ’) and dissipation factor (tand) from measured input impedances of...
Journal of Research of NIST and Predecessor Publications

Radiation field from a circular disk source
radiation, Legendre, coefficients, expansion, source, detector, buildup
A number of radiation shielding problems involve calculations of the response of an isotropic detector to radiation of arbitrary angular distribution from uniform finite plane sources. Series expansion methods previously used for treating the...
Journal of Research of NIST and Predecessor Publications

Radiation field from a rectangular source
radiation, detector, surface, Legendre polynomial expansion
Many radiation shielding problems involve calculations of the response of an isotropic detector to radiation of arbitrary angular distribution from uniform rectangular sources. In calculations of this type the family of integrals (integral...
Journal of Research of NIST and Predecessor Publications

Joe Motz x-ray physics team
radiation physics; National Bureau of Standards (U.S.)
Joe Motz from the National Bureau of Standards X-ray physics group. Others pictured from left: Jimmy Humphries, John Mills, Julian Sparrow. Kneeling: Robert Placious; from right Joe Motz, Samuel Chappell, Charles Dick.
NBS-NIST Divisions, Offices, and Programs

Robert Loevinger with Wide Angle Free Air Chamber
radiation physics; National Bureau of Standards (U.S.)
Robert Loevinger constructing Wide Angle Free Air Ionization Chamber (WAFAC) for low energy brachytherapy seeds.
NBS-NIST Divisions, Offices, and Programs

Paul Lamperti with wide angle free air chamber (WAFAC)
radiation physics; National Bureau of Standards (U.S.)
Paul Lamperti with wide angle free air chamber (WAFAC) for brachytherapy seed measurements
NBS-NIST Divisions, Offices, and Programs

Leon Francis Curtiss Portrait photo in NIST Gallery
radiation physics; National Bureau of Standards (U.S.)
Leon Francis Curtiss Portrait in the NIST Gallery of Distinguished Scientists, Engineers, and Administrators
NBS-NIST Divisions, Offices, and Programs

Wilfrid B. Mann Portrait photo in NIST Gallery
radiation physics; National Bureau of Standards (U.S.)
Wilfrid B. Mann Portrait in the NIST Gallery of Distinguished Scientists, Engineers, and Administrators
NBS-NIST Divisions, Offices, and Programs

Leroy Stockman launching radiosonde from roof NBS
radiation physics; National Bureau of Standards (U.S.)
Leroy Stockman launching a radiosonde from a roof at the Natioal Bureau of Standards
NBS-NIST Divisions, Offices, and Programs

Radiation monitoring system built by NBS for the U.S. Atomic Energy Commission (AEC)
radiation physics; National Bureau of Standards (U.S.)
An unidentified worker is pictured with the monitoring system built by NBS researchers Louis Costrell and Lauriston Taylor. It was built for the U.S. Atomic Energy Commission (AEC) with multiple sensor stations to monitor the radiation levels at...
NBS-NIST Divisions, Offices, and Programs

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