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Cutting the d-cube
Cube; geometry; hyperplane.
Some problems concerned with cutting faces of the cube with affine or linear spaces are considered. It is shown that through any d-3 points of Rd there passes a hyperplane which cuts all the facets of the d-cube. Furthermore, it is shown that if m...
Journal of Research of NIST and Predecessor Publications

Systems of distinct representatives and linear algebra
Algorithms; combinatorics; indeterminates; linear algebra; matroids; systems of distinct representatives; term rank
Some purposes of this paper are: (1) To take seriously the term , ""term rank."" (2) To make an issue of not ""rearranging rows and columns"" by not ""arranging"" them in the first place. (3) To promote the numerical use of Cramer's rule. (4) To...
Journal of Research of NIST and Predecessor Publications

Ultrasonic Continuous-Wave Beam-Power Measurements; International Intercomparison
intercomparison of standards; ultrasonic power standards; ultrasonic transducers.
Some quartz transducers designed and fabricated at the National Bureau of Standards as transmitters of ultrasonic power appear to be sufficiently stable and linear to serve as standards. Therefore, an international intercomparison of measurements...
Journal of Research of NIST and Predecessor Publications

Three observations on nonnegative matrices
Bounds; eigenvalues; nonnegative matrices
Some results on nonnegative matrices are proved, of which the following is representative: Let A = (aij) be a nonnegative row stochastic matrix. If [formula not included] is an eigenvalue of A, then [equation].
Journal of Research of NIST and Predecessor Publications

Velocity of Sound in Liquid Propane
adiabatic compressibility; liquid; pressure; propane; sound; specific heat ratios; speed; temperature; velocity.
Sound velocity measurements on liquid propane from 90 to 300 K and for pressures to 34 MPa are reported. Also included are saturated liquid sound velocities from 90 to 290 K. The data were combined with Prho T data to compute compressibility and...
Journal of Research of NIST and Predecessor Publications

"Bone Char Research. Frank G. Carpenter placing a set of sieves containing bone char on a shaking machine."
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

$Bone Char Research. Frank G. Carpenter examines a test fraction of sugar liquor purified by bone...$
Bone Char Research. Frank G. Carpenter examines a test fraction of sugar liquor purified by bone char.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

Bone Char Research. A hot laboratory rotary kiln containing bone char is being removed from a furnace.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

Bone Char Research. Russell Arnold (foreground) and Frank G. Carpenter (background) investigate the adsorption of a carbon dioxide on bone char.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

Bone Char Research. John Redd VI preparing sugar samples for analysis in an automatic chloride titrator.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

"Bone Char Research. As part of fundamental adsorption studies, graphite flakes in a Vycor tube are removed from a furnace prior to immersion in liquid oxygen.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

Bone Char Research. Light scattering pattern (scattering envelope) of a refined sugar compared with that of molecular sucrose.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

Bone Char Research. Partciles of revivified bone char.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

"Bone Char Research. Martha Peiperl using a high voltage electrophoresis apparatus to separate various ions present in sugar solutions.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

Bone Char Research. Two test tubes comparing the refrative index of silica in solution.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

Bone Char Research. Hillar M. Rootare using a gas chromatographic method that was developed by the NBS for determining low levels of carbonate.
Bone Char Research Project
Source: Summary Technical Reports photo collection, NIST Archives. STR Report No. 2716, "Bone Char Research at the National Bureau of Standards," May 1962. See also "Bone Char Research," NBS Technical News Bulletin, Vol. 46, No. 7, July 1962. pp....
Historic Images

Absolute spatially- and temporally-resolved optical emission measurements of rf glow discharges in argon
argon; discharge; gaseous electronics; optical emission; plasma; rf; spatial profile; temporal dependence
Spatially- and temporally-resolved measurements of optical emission intensities are presented from rf discharges in argon over a wide range of pressures (6.7 to 133 Pa) and applied rf voltages (75 to 200 V). Results of measurements of emission...
Journal of Research of NIST and Predecessor Publications

Electric fields produced by a charge density in ionic crystals
CaF2; dipole shell coefficient; electric fields; NaCl; polarization; spatially extended defects
Spatially extended defects such as the F center give rise to an effective defect charge density which may produce important polarizations in the crystal. The electric field in the crystal depends upon these induced dipoles. Lattice summations for...
Journal of Research of NIST and Predecessor Publications

Receiving sets for aircraft beacon and telephony
Special light-weight radio receiving sets of high sensitivity have been designed adapted for the reception on aircraft of signals from radio beacons and ground radiotelephone stations. A statement of the important considerations involved in the...
Journal of Research of NIST and Predecessor Publications

Enthalpy and specific heat of 9 corrosion-resistant alloys at high temperatures.
enthalpy, alloys, specific heat, chemical analysis
Specific heats from 0 to 900 °C that are believed to be accurate in general to within ±0.3 percent are reported for two alloys: 90 Ni-10 Cr and stainless steel, type 316. These values were calculated from enthalpies measured with a drop method and...
Journal of Research of NIST and Predecessor Publications

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