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353
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51
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24
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21
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9
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15
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461 Matching Results
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461
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Some Useful Linear Coupling Approximations
N/A
Date:
July 1, 2003
Creator:
Gardner, C. J.
System:
The UNT Digital Library
Effect of Blade Loading of the Climb and High-Speed Performance of a Three-Blade Hamilton Standard No. 6507A-2 Propeller on a Republic P-47D Airplane
Report presenting climb and high-speed tests of a Hamilton Standard No. 6507A-2 three-blade propeller, which have been made to determine the effect of blade loading on propeller efficiency. The normal and military power climb efficiencies were found to be about equal at altitudes below 16,000 feet.
Date:
July 1945
Creator:
Gardner, John J.
System:
The UNT Digital Library
Simulations of merging and squeezing bunches in booster and AGS
N/A
Date:
July 30, 2012
Creator:
Gardner, C. J.
System:
The UNT Digital Library
Flight Tests of a Curtiss No. 838-1C2-18 Three-Blade Propeller Having Trailing-Edge Extensions
"Flight tests to determine propeller performance have been made of a Curtiss No. 838-102-18 three-blade propeller having trailing-edge extensions on a Republic P-47D-28 airplane in climb and high speed. These tests are a part of a general propeller flight-test program at the Langley Laboratory of the National Advisory Committee for Aeronautics. Results of climb tests indicate that when power is changed from approximately 1475 horsepower at 2550 rpm (roughly normal power) to 2400 horsepower at 2700 rpm (approximately military power) there is a loss in propeller efficiency of 3 percent at an altitude of 7000 feet, and 4 percent at 21,000 feet" (p. 1).
Date:
July 16, 1947
Creator:
Gardner, John J.
System:
The UNT Digital Library
Calculation of the Mean Energy Loss in the BTA Stripping Foils and Comparison with Measurement
N/A
Date:
July 1, 2002
Creator:
Ahrens, L. & Gardner, C. J.
System:
The UNT Digital Library
Use of gamma ray strength functions for predicting the neutron capture cross section of /sup 88/Y
The present study indicates that the estimation of the gamma-ray strength function is the approach least subject to error when unmeasured capture cross sections are to be computed. An estimate is given for the /sup 88/..gamma..(n,..gamma..) cross section.
Date:
July 29, 1977
Creator:
Gardner, D. G. & Gardner, M. A.
System:
The UNT Digital Library
Three-dimensional radiation transport hydrodynamics
None
Date:
July 1, 1994
Creator:
Fyfc, D. E.; Dahlburg, J. P.; Gardner, J. H. & Haan, S. W.
System:
The UNT Digital Library
Theoretical analysis of the motions of an aircraft stabilized in roll by a displacement-response, flicker-type automatic pilot
Report presenting a general analysis that allows the rolling motions of an aircraft using a displacement-response, flicker-type automatic pilot to be determined. The system is not ideal for many stabilization problems due to inherent residual oscillations, but it offers a simple and economical solution in situations in which steady state oscillations are not a problem. Results regarding some general remarks, transient and steady states, stabilization boundaries, amplitude equations, and period equations are provided.
Date:
July 7, 1948
Creator:
Curfman, Howard J., Jr. & Gardner, William N.
System:
The UNT Digital Library
Function, J(x,y), occurring in problems of solute transport with non-equilibrium interphase mass transfer
The function, J(x,y), which has appeared frequently in analytical solutions of a variety of technical problems, is described and its applications briefly reviewed. Two detailed examples of applications are given. Tabulations of functions related to J(x,y) are listed, and relationships of J(x,y) to these functions are stated. Methods of computation of J(x,y), suitable for use with digital computers, are described.
Date:
July 1, 1981
Creator:
Carnahan, C. L.
System:
The UNT Digital Library
saSNP Approach for Scalable SNP Analyses of Multiple Bacterial or Viral Genomes
None
Date:
July 27, 2010
Creator:
Gardner, S & Slezak, T
System:
The UNT Digital Library
Slant Borehole Demonstration Summary Report
This report provides a summary of the demonstration project for development of a slant borehole to retrieve soil samples from beneath the SX-108 single-shell tank. It provides a summary of the findings from the demonstration activities and recommendations for tool selection and methods to deploy into the SX Tank Farm. Daily work activities were recorded on Drilling and Sampling Daily Work Record Reports. The work described in this document was performed during March and April 2000.
Date:
July 19, 2000
Creator:
GARDNER, M.G.
System:
The UNT Digital Library
Near-field dispersal modeling for liquid fuel-air explosives
The near-field, explosive dispersal of a liquid into air has been explored using a combination of analytical and numerical models. The near-field flow regime is transient, existing only as long as the explosive forces produced by the detonation of the burster charge dominate or are approximately equal in magnitude to the aerodynamic drag forces on the liquid. The near-field model provides reasonable initial conditions for the far-field model, which is described in a separate report. The near-field model consists of the CTH hydrodynamics code and a film instability model. In particular, the CTH hydrodynamics code is used to provide initial temperature, pressure, and velocity fields, and bulk material distribution for the far-field model. The film instability model is a linear stability model for a radially expanding fluid film, and is used to provide a lower bound on the breakup time and an upper and lower bound on the initial average drop diameter for the liquid following breakup. Predictions of the liquid breakup time and the initial arithmetic average drop diameter from the model compare favorably with the sparse experimental data. 26 refs., 20 figs., 8 tabs.
Date:
July 1, 1990
Creator:
Gardner, David R.
System:
The UNT Digital Library
Utilization of geothermal energy for methane production for J. A. Albertson Land and Cattle Company. Final report
The feasibility of an integrated system to utilize a geothermal resource for a bioconversion plant. This integrated facility would use the manure from approximately 30,000 head of feedlot cattle as a feedstock for an anaerobic digestion plant. The findings on engineering design, geological assessment, environmental, economic, and institutional requirements of the proposed project are summarized. (MHR)
Date:
July 1, 1980
Creator:
unknown
System:
The UNT Digital Library
Thermoacoustic natural gas liquefier
This is the final report of a two-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). This project sought to develop a natural-gas-powered natural-gas liquefier that has absolutely no moving parts and requires no electrical power. It should have high efficiency, remarkable reliability, and low cost. The thermoacoustic natural-gas liquefier (TANGL) is based on our recent invention of the first no-moving-parts cryogenic refrigerator. In short, our invention uses acoustic phenomena to produce refrigeration from heat, with no moving parts. The required apparatus comprises nothing more than heat exchangers and pipes, made of common materials, without exacting tolerances. Its initial experimental success in a small size lead us to propose a more ambitious application: large-energy liquefaction of natural gas, using combustion of natural gas as the energy source. TANGL was designed to be maintenance-free, inexpensive, portable, and environmentally benign.
Date:
July 1, 1996
Creator:
Swift, G.; Gardner, D.; Hayden, M.; Radebaugh, R. & Wollan, J.
System:
The UNT Digital Library
Determination of platinum, iridium, and rhodium in uranium alloys by atomic- absorption spectrophotometry
None
Date:
July 1, 1973
Creator:
Gardner, R. D.; Henicksman, A. L. & Ashley, W. H.
System:
The UNT Digital Library
HIGH-SPEED MICROWAVE PHASE SHIFTERS USING VARACTOR DIODES
None
Date:
July 24, 1964
Creator:
Gardner, A. L. & Hawke, Ronald S.
System:
The UNT Digital Library
RECYCLE OF UO$sub 2$F$sub 2$ IN THE FLUOROX PROCESS: REACTION OF UO$sub 2$F$sub 2$ WITH HYDROGEN
The reaction of U0/sub 2/F/sub 2/ with hydrogen at 700 to 850 deg C was briefly investigated since it could constitute a major step in the recycle of U0/ sub 2/F/sub 2/ in the Fluorox process. The reaction in this temperature range proceeds according to the equation U0/sub 2/F/sub 2/ + H/sub 2/ yields U0/sub 2/ + 2 HF. Rates of the chemical reaction were not obtsined, since, with the thermogravimetric technique used, the rate-controlling process was bed diffusion. However, there is no doubt that the rate of chemical reaction is sufficiently high for the desired application. No significant amount of UF/sub 4/ was formed by the back-reaction, U0/sub 2/ + 4 HF yields UF/sub 4/ + 2 H/sub 2/0. (auth)
Date:
July 1, 1959
Creator:
Ferris, L.M. & Gardner, R.P.
System:
The UNT Digital Library
Temperature-gradient and heat-flow data, Panther Canyon, Nevada
A series of six shallow temperature-gradient holes were drilled for Sunoco Energy Development Company in Panther Canyon, Pershing County, Nevada during the period March 24 through June 15, 1981. A proposed intermediate-depth gradient hole was spud but abandoned after encountering unresolvable drilling problems. The locations of these holes are shown on figure 1. This report summarizes the results of the Panther Canyon project.
Date:
July 1, 1981
Creator:
Fisher, Marci A. & Gardner, Murray C.
System:
The UNT Digital Library
The effect of ICRF antenna phasing on metal impurities in TFTR
ICRF power levels of up to 2.8 MW were achieved during the 1988 experimental run on TFTR. Metal impurity concentrations (Ti, Cr, Fe, Ni) and Z/sub eff/ were monitored during ICRF heating by x-ray pulse height analysis and uv spectroscopy. Antenna phasing was the key variable affecting ICRF performance. No increase in metallic impurities was observed for P/sub rf//approx lt/ 2.8 MW with the antenna straps 0-/Pi/, while a measurable increase in titanium (Faraday screen material) was observed for P/sub rf/ /approx gt/ 1.0 MW with 0-0 phasing. 18 refs., 8 figs.
Date:
July 1, 1989
Creator:
Stevens, J. E.; Bush, C.; Colestock, P. L.; Greene, G. J.; Hill, K. W.; Hosea, J. C. et al.
System:
The UNT Digital Library
High-energy measurements of neutron-induced fission cross-section ratios involving $sup 233$U, $sup 235$U, $sup 238$U, and $sup 239$Pu using the method of threshold cross sections
None
Date:
July 16, 1974
Creator:
Behrens, J. W. & Carlson, G. W.
System:
The UNT Digital Library
Electrical substation service-area estimation using Cellular Automata: An initial report
The service areas for electric power substations can be estimated using a Cellular Automata (CA) model. The CA model is a discrete, iterative process whereby substations acquire service area by claiming neighboring cells. The service area expands from a substation until a neighboring substation service area is met or the substation`s total capacity or other constraints are reached. The CA-model output is dependent on the rule set that defines cell interactions. The rule set is based on a hierarchy of quantitative metrics that represent real-world factors such as land use and population density. Together, the metrics determine the rate of cell acquisition and the upper bound for service area size. Assessing the CA-model accuracy requires comparisons to actual service areas. These actual service areas can be extracted from distribution maps. Quantitative assessment of the CA-model accuracy can be accomplished by a number of methods. Some are as simple as finding the percentage of cells predicted correctly, while others assess a penalty based on the distance from an incorrectly predicted cell to its correct service area. This is an initial report of a work in progress.
Date:
July 1, 1998
Creator:
Fenwick, J.W. & Dowell, L.J.
System:
The UNT Digital Library
Geochemical and hydrologic data for wells and springs in thermal-spring areas of the Appalachians
Current interest in geothermal potential of thermal-spring areas in the Appalachians makes all data on thermal springs and wells in these areas valuable. Presented here without interpretive comment are maps showing selected springs and wells and tables of physical and chemical data pertaining to these wells and springs. The chemical tables show compositions of gases (oxygen, nitrogen, argon, methane, carbon dioxide, and helium), isotope contents (tritium, carbon (13), and oxygen (18)), trace and minor element chemical data, and the usual complete chemical data.
Date:
July 1, 1976
Creator:
Hobba, W. A., Jr.; Chemerys, J. C.; Fisher, D. W. & Pearson, F. J. Jr.
System:
The UNT Digital Library
Reactor safety issues resolved by the 2D/3D Program. International Agreement Report
The 2D/3D Program studied multidimensional thermal-hydraulics in a PWR core and primary system during the end-of-blowdown and post-blowdown phases of a large-break LOCA (LBLOCA), and during selected small-break LOCA (SBLOCA) transients. The program included tests at the Cylindrical Core Test Facility (CCTF), the Slab Core Test Facility (SCTF), and the Upper Plenum Test Facility (UPTF), and computer analyses using TRAC. Tests at CCTF investigated core thermal-hydraulics and overall system behavior while tests at SCTF concentrated on multidimensional core thermal-hydraulics. The UPTF tests investigated two-phase flow behavior in the downcomer, upper plenum, tie plate region, and primary loops. TRAC analyses evaluated thermal-hydraulic behavior throughout the primary system in tests as well as in PWRs. This report summarizes the test and analysis results in each of the main areas where improved information was obtained in the 2D/3D Program. The discussion is organized in terms of the reactor safety issues investigated.
Date:
July 1, 1993
Creator:
Damerell, P. S. & Simons, J. W.
System:
The UNT Digital Library
Cross sections for the $sup 66$Zn(n,p)$sup 66$Cu, $sup 113$In(n,n')/sup113m/ In and $sup 115$In(n,n')/sup 115m/In reactions from near threshold to 10 MeV
None
Date:
July 1, 1975
Creator:
Smith, D. L. & Meadows, J. W.
System:
The UNT Digital Library