129,808 research outputs found
Curtis L. Drake Interview, 30 July 2014
No full textCurtis L. Drake is a deacon at Union Grove Missionary Baptist Church. He has been a member since 1959 and met his wife at the church. He first moved to the Central neighborhood from Alabama with his family and has been here ever since
Curtis L. Drake Interview, 30 July 2014
No full textCurtis L. Drake is a deacon at Union Grove Missionary Baptist Church. He has been a member since 1959 and met his wife at the church. He first moved to the Central neighborhood from Alabama with his family and has been here ever since
A deterministic algorithm for experimental design applied to tomographic and microseismic monitoring surveys
No full textMost general experimental design algorithms are either: (i) stochastic and hence give different designs each time they are run with finite computing power, or (ii) deterministic but converge to results that depend on an initial or reference design, taking little or no account of the range of all other possible designs. In this paper we introduce an approximation to standard measures of experimental design quality that enables a new algorithm to be used. The algorithm is simple, deterministic and the resulting experimental design is influenced by the full range of possible designs, thus addressing problems (i) and (ii) above. Although the designs produced are not guaranteed to be globally optimal, they significantly increase the magnitude of small eigenvalues in the model–data relationship (without requiring that these eigenvalues be calculated). This reduces the model uncertainties expected post-experiment. We illustrate the method on simple tomographic and microseismic location examples with varying degrees of seismic attenuation
Curtis Type Non-Inductive Resistors
No full textIn response to a need for increasing precision in alternating current research, researchers at the National Bureau of Standards (NBS) undertook an investigation into the behavior of resistance coils when subjected to alternating current voltage. Many commercial resistance coils performed well with direct currents, but could not measure alternating currents satisfactorily. Several NBS staff members were pioneers in developing special windings in which the turns were frequently reversed in direction to minimize inductance or capacitance in resistors used on alternating current. Later, manufacturers developed looms for weaving such resistors.
These two resistors, developed circa 1912 by Harvey L. Curtis of NBS and each of 1,000 ohms, were wound on a split cylindrical form so that the successive turns led the current around the form in opposite directions. The magnetic effects of the current were thus minimized, its inductance reduced to +30 microhenrys, while the difference of potential between adjacent turns, and hence the effective capacitance, was much smaller than in the more common bifilar winding.[H] 23 cm [W] 10.5 cm [L] 11.5 c
Pressure Gauge for Naval Ordnance
No full textThis pressure gauge, designed by Harvey L. Curtis of the National Bureau of Standards, is an adaptation made during World War II for use on 3-inch gun. The gauge was originally used on 14-inch guns in World War I. During World War II, a group of National Bureau of Standards and Geophysical Laboratory scientists, under the direction of Harvey L. Curtis, worked at the David Taylor Model Basin, Carderock, Maryland, on the ballistics of 3-inch and 90-millimeter guns. This was a modernized continuation of earlier studies (see 1998.0071.001 and 1998.0077.001). See also 1998.0070.001, 1998.0073.001, 1998.0074.001, 1998.0076.001, and 1998.0077.001.[H] 18 cm [Diam] 8 cm [L] 14 c
Pressure Gauge for Naval Ordnance
No full textThis is a pressure gauge for Naval Ordnance designed by Harvey L. Curtis of the National Bureau of Standards. Applying increased pressure to this device expanded its core elastically, stretched the wire and increased its resistance. This object is similar to another pressure gauge in the collection (1998.0073.001), but the sensing resistor is wound tightly on a hollow core. During World War II, a group of National Bureau of Standards and Geophysical Laboratory scientists, under the direction of Harvey L. Curtis, worked at the David Taylor Model Basin, Carderock, Maryland, on the ballistics of 3-inch and 90-millimeter guns. This was a modernized continuation of earlier studies (see 1998.0071.001 and 1998.0077.001). See also 1998.0070.001, 1998.0073.001, 1998.0075.001, and 1998.0076.001.[H] 5.5 cm [Diam] 3.5 cm11
Pressure Gauge for Naval Ordnance
No full textThis is a pressure gauge for Naval Ordnance designed by Harvey L. Curtis of the National Bureau of Standards. This object is similar to another pressure gauge in the collection (1998.0074.001), but the sensing resistance wires are cemented longitudinally on the surface of the solid core and decrease in resistance as the core is shortened elastically by the force exerted on its end. During World War II, a group of National Bureau of Standards and Geophysical Laboratory scientists, under the direction of Harvey L. Curtis, worked at the David Taylor Model Basin, Carderock, Maryland, on the ballistics of 3-inch and 90-millimeter guns. This was a modernized continuation of earlier studies (see 1998.0071.001 and 1998.0077.001). See also 1998.0070.001, 1998.0074.001, 1998.0075.001, and 1998.0076.001.[H] 4 cm [W] 10.5 cm [D] 4.5 c
Curtis Hanson, L. A. Confidential,
No full textMalassinet Alain. Curtis Hanson, L. A. Confidential,. In: Raison présente, n°125, 1er trimestre 1998. De la vie domestique. pp. 111-112
Curtis, L W, NX35231
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/380167Surname: CURTIS
Given Name(s) or Initials: L W
Military Service Number or Last Known Location: NX35231
Missing, Wounded and Prisoner of War Enquiry Card Index Number: 12829193979
Item: [2016.0049.12460] "Curtis, L W, NX35231
Curtis Colvin, Utah Uranium Oral History Project
No full textTranscript (35 pages) of an interview by Gary Shumway with Curtis Colvin, on August 11, 1970. From tape number 79 in the Uranium History SeriesColvin, a chemist, was interviewed by Gary Shumway in Provo, Utah. Subjects: personal background, experiences at Hanford atomic plant. solvent extraction process, people at Hanford, changes in companies, experiences with the federal government, breeder reactors (35 pages)
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