CONTENTdm Title

Maximal network flows, matroids and matchings
Independence properties; matroids; maximal flows; network flows
This paper represents new proofs for some known network flow results. First, maximal network flows are expressed as matroids, and then Gale's characterization of matroids is used to prove the existence of various lexicographic network flows....
Journal of Research of NIST and Predecessor Publications

Minimum partition of a matroid into independent subsets
Independent subsets; matroid M; minimum partition
A matroid M is a finite set M of elements with a family of subsets, called independent, such that (1) every subset of an independent set is independent, and (2) for every subset A of M, all maximal independent subsets of A have the same...
Journal of Research of NIST and Predecessor Publications

Index to the distributions of mathematical statistics
Index; mathematical statistics; statistical hypotheses
A fairly complete index of references to results on statistical distributions published before January 1958 is presented. The material given for each distribution is a list of references relating to: (a) functions and constants which characterize...
Journal of Research of NIST and Predecessor Publications

$Abbe Refractometer$
Abbe Refractometer
The Abbe refractometer, invented by Ernst Abbe of the firm of Carl Zeiss, provides a convenient means for the determination of the index of refraction and Abbe number (a measure of spectral dispersion) of a liquid. At the lower end of the telescope...
NIST Museum Artifacts

Numerical modeling of silicon photodiodes for high-accuracy applications, Part II. Interpreting oxide-bias experiments
induced junction photodiode; inversion layer photodiode; numerical modeling; numerical simulation; oxide-bias experiment; quantum efficiency
The semiconductor device modeling program PC-1D and the programs that support its use in high-accuracy modeling of photodiodes, all of which were described in Part I of this series of papers, are used to simulate oxide-bias self-calibration...
Journal of Research of NIST and Predecessor Publications

Stability of Small industrial Platinum Resistance Thermometers
Industrial platinum resistance thermometers (IPRTs); platinum resistance thermometers (PRTs); temperature; thermometers; thermometry.
This paper reports the results of an investigation of the stability of a selection of small industrial platinum resistance thermometers (IPRTs) upon heat treatment and handling. Ninety-four IPRTs, of several models, obtained from five manufacturers...
Journal of Research of NIST and Predecessor Publications

Ewing Extensometer
The Ewing extensometer was one of the few instruments available during the early years of the National Bureau of Standards which possessed the sensitivity and precision necessary to determine the modulus (or stiffness) of a metal specimen. Its...
NIST Museum Artifacts

Double-focusing thermal triple-axis spectrometer at the NCNR
Inelastic neutron scattering; neutron diffraction; polarized neutrons; position sensitive detector; thermal neutron triple-axis spectrometer
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 equipped with a selection of S�ller collimators, beam-limiters, and pyrolytic graphite...
Journal of Research of NIST and Predecessor Publications

On certain discrete inequalities and their continuous analogs
Inequalities; norms; Wirtinger
The purpose of this paper is to find inequalities between the L2-norms of a function and its kth and mth derivatives.
Journal of Research of NIST and Predecessor Publications

Analysis of Interior-Point Paths
infeasible interior-point paths; linear complementarity problems; linear programs; semidefinite linear complementarity problems; semidefinite linear programs
Infeasible-interior-point paths are the main tools in interior-point methods for solving many kinds of optimization problems. These paths are usually parametrized by a penalty-parameter r down arrow 0 and further parameters describing their...
Journal of Research of NIST and Predecessor Publications

Magnetic Storage Disc
This mylar disc is a copy of the aluminum discs that were actually used in the first working model of a magnetic disc for computer memory, designed by Jacob Rabinow at the National Bureau of Standards in 1951. Each disc could hold about 1,000,000...
NIST Museum Artifacts

Univac I Nameplate
Plaque from Univac I digital computer dated March 1951-Oct 1963. The National Bureau of Standards developed many of the computer programs for the Univac I.
NIST Museum Artifacts

SEAC Input/Output Media
Early computer input and output media, most likely of the types used in the Standards Electric Automatic Computer (SEAC), a first generation digital computer operated by the National Bureau of Standards from 1950 to 1963.
NIST Museum Artifacts

SEAC Property Tag
Standards Electronic Automatic Computer (SEAC) property tag. Mounted tag presented at the retirement of SEAC on April 23, 1964. SEAC was a first-generation electronic computer, built in 1950 by the National Bureau of Standards. SEAC began operation...
NIST Museum Artifacts

Demo Panel for "AND" Gates and "OR" Gates.
Possible part of the Standards Electronic Automtic Computer (SEAC), a first generation digital computer built and operated by the National Bureau of Standards from 1950-1963.
NIST Museum Artifacts

Clipper Chip & Tessera Card
The Clipper Chip electronic device is the first implementation of Federal Information Processing Standard 185, the Escrowed Encryption Standard (EES). The device was designed by MYKOTRONX, manufactured by VLSI and used in a Secure Telephone Device...
NIST Museum Artifacts

Rocket e-Book reader
The Rocket e-Book is an electronic ebook reader designed by NuvoMedia and sold between 1998 and 2000. The device weighs 22 ounces. Its weight was cited as one of the reasons consumers disliked using it. Other reasons included the size of the...
NIST Museum Artifacts

Black Control Panel
This artifact is a control panel with dials and switches; its label reads "Panel 1-1." Labels on the front indicate "MA1", "MA2" and "Bits 16-13".
NIST Museum Artifacts

Secondary Standard for 12.65 mm (0.5 in) Magnetic Tape Cartridge SRM 3202
National Bureau of Standards Standard Reference Material (SRM) 3202. The Secondary Standard Magnetic Tape Cartridge is used to calibrate the typical field, average signal amplitude, resolution and overwrite for magnetic tape cartridges. This SRM...
NIST Museum Artifacts

Secondary Standard Magnetic Tape Cassette SRM 1600
National Bureau of Standards Standard Reference Material (SRM) 1600. This Secondary Standard Magnetic Tape Cassette (Computer Amplitude Reference) was used in the calibration of output signal amplitude from computer magnetic tape cassette recording...
NIST Museum Artifacts

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