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  • 1
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    James Robert Brown: Smoke and Mirrors: How Science Reflects Reality (Book Review) (1994)
    Oxford : Periodicals Archive Online (PAO)
    The British journal for the philosophy of science. 45:4 (1994:Dec.) 1059 
    Details
    ISSN: 0007-0882
    Topics: Natural Sciences in General , Philosophy
    Notes: Reviews
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:4064-1994-045-04-000008
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Influence of elastic support on the bending of parallelogram plates (1968)
    Springer
    Flow, turbulence and combustion 18 (1968), S. 68-80 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The influence of elastic support on the centre deflections and maximum centre and edge moments in clamped parallelogram shaped plates is examined. A polynomial series is assumed for the deflection function, and by applying Galerkin's process, an approximate solution to the governing differential equation is obtained. Convergence of the results were verified. Results for various skew angles and aspect ratios are presented graphically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382337
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of clamped parallelogrammic panels with variable thickness (1970)
    Springer
    Flow, turbulence and combustion 22 (1970), S. 287-294 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A simple polynomial form is chosen to represent the deflection configuration of clamped parallelogrammic panels with variable thickness. Galerkin's variational procedure is then used to yield an approximate solution to the governing differential equation of such panels under uniform lateral load. A fair agreement is shown between the theoretical results and those found from tests on a Plexiglas plate model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00400534
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    Paper (German National Licenses)
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  • 4
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    Influence of elastic support on the bending of parallelogram plates (1968)
    Springer
    Details
    Publication Date: 1968-01-01
    Print ISSN: 1386-6184
    Electronic ISSN: 1573-1987
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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    PAPER CURRENT
  • 5
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    On the isoperimetric problem for the higher eigenvalues of the Robin and Wentzell Laplacians (2010)
    Springer
    Details
    Publication Date: 2010-01-12
    Print ISSN: 0044-2275
    Electronic ISSN: 1420-9039
    Topics: Mathematics , Physics
    Published by Springer
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    PAPER CURRENT
  • 6
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    Reinforced earth retaining wall under vertical and horizontal strip loading (1984)
    Canadian Science Publishing
    Details
    Publication Date: 1984-08-01
    Description: A study was carried out on the structural response of a reinforced earth retaining wall model subjected to the action of a surcharge strip load aligned parallel to the wall head. Effects of both vertical and horizontal load components were investigated. Horizontal loads were applied in two directions, namely, towards the wall face and away from the wall face. The stress distribution pattern in the reinforcing elements and the change in stress distribution occurring in the reinforced earth medium were also studied. Results were generated for various loading conditions, including variations in the load distance from the wall face. Contour diagrams showing the ratio of reinforcing element stress to applied horizontal load intensity, as well as contour diagrams showing the ratio of horizontal soil stress to applied horizontal load intensity, were constructed. Experimental results were compared with the theoretical stress distribution that exists in a semi-infinite elastic medium, and also with design procedure currently in use for reinforced earth retaining walls under horizontal surcharge strip loading. Significant differences were found between the results based on the design method now in use and those obtained from the model study. Key words: reinforced earth, vertical and horizontal strip load, reinforcing elements, stress distribution, stress-sensitive regions, contours, deflections.
    Print ISSN: 0008-3674
    Electronic ISSN: 1208-6010
    Topics: Geosciences
    Published by Canadian Science Publishing
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  • 7
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    Reinforced earth retaining wall analysis and design (1986)
    Canadian Science Publishing
    Details
    Publication Date: 1986-08-01
    Description: An experimental and theoretical study was conducted to assess the maximum tensile forces mobilized in a reinforced earth retaining wall, subjected to a vertical surcharge strip load or the combined action of vertical and horizontal surcharge strip loads. A simple design method for determining the maximum magnitude of the tensile force and its distribution with depth of the reinforced earth backfill was developed. The design method takes into consideration the ability of the reinforced earth wall system to retain its internl equilibrium by stress transfer from overstressed regions to those regions where the reinforcing elements have not yet reached their full frictional or strength capacity. The effect of the magnitude and location of the strip load on this phenomenon of stress transfer is shown. Favourable comparisons were obtained between the results given by the proposed design method and those from model tests. Key words: reinforced earth, vertical and horizontal surcharge strip load, reinforcing elements, internal stability, stress transfer.
    Print ISSN: 0008-3674
    Electronic ISSN: 1208-6010
    Topics: Geosciences
    Published by Canadian Science Publishing
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  • 8
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    Broad Specification Fuels Combustion Technology Program, Phase 2 (1990)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An experimental evaluation of two advanced technology combustor concepts was conducted to evolve and assess their capability for operation on broadened properties fuels. The concepts were based on the results of Phase 1 of the Broad Specification Fuel Combustor Technology Program which indicated that combustors with variable geometry or staged combustion zones had a flexibility of operation that could facilitate operation on these fuels. Emphasis in defining these concepts included the use of single pipe as opposed to duplex or staged fuels systems to avoid the risk of coking associated with the reduction in thermal stability expected in broadened properties fuels. The first concept was a variable geometry combustor in which the airflow into the primary zone could be altered through valves on the front while the second was an outgrowth of the staged Vorbix combustor, evolved under the NASA/P&W ECCP and EEE programs incorporating simplified fuel and air introduction. The results of the investigation, which involved the use of Experimental Referee Broad Specification (ERBS) fuel, indicated that in the form initially conceived, both of these combustor concepts were deficient in performance relative to many of the program goals for performance emissions. However, variations of both combustors were evaluated that incorporated features to simulate conceptual enhancement to demonstrate the long range potential of the combustor. In both cases, significant improvements relative to the program goals were observed.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: NASA-CR-191066 , NAS 1.26:191066
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    High Weber number SMD correlations for pressure atomizers (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Recently acquired experimental data are presented which reveal that, for Weber number (We) greater than 10.0, the atomization from simplex pressure atomizers is significantly greater than would be predicted from previously derived Sauter mean diameter (SMD) correlations. A different SMD correlation is required to accurately predict the experimental data. Below We of about 10.0, the atomization is dominated by inertial forces and bag-type breakup results. Above We of about 10.0, shear-type breakup occurs and results in a very fine spray which can accurately be predicted using a quadratic expression in Delta P. The correlation is extended to include fuel property effects, and SMD is found to vary linearly with fuel surface tension, while the influence of the fuel viscosity is not apparent.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: ASME PAPER 85-GT-37
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Atomization and combustion characteristics of antimisting fuels using JT8D and air-boost injectors (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The atomization levels of antimisting fuels are presently determined for a JT8D fuel injector, a low emission airblast JT8D injector, and an air-boost injector, at operating conditions simulating engine operating conditions. The effects of the use of antimisting kerosene (AMK) on component performance are also studied in the case of an in-service JT8D engine. The use of the AMK fuel causes a decline in the quality of the spray, most notably as a large increase in the Sauter mean diameter for all three injector types. In addition, the idle patternation data obtained indicate that the low emission injector fuel distribution changed from a hollow cone Jet A spray having no fuel at its center to a semihollow spray cone in the case of AMK; this change could disrupt the combustor primary zone recirculation pattern.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: ASME PAPER 86-GT-223
    Format: text
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    NASA TECHNICAL REPORTS
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