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  • 1985-1989
  • 1975-1979  (10)
  • 1978  (10)
Collection
Keywords
Publisher
Years
  • 1985-1989
  • 1975-1979  (10)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Close-to-convex functions and their extreme points in Hornich space (1978)
    Springer
    Monatshefte für Mathematik 85 (1978), S. 235-244 
    Details
    ISSN: 1436-5081
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract LetK andC denote, respectively, the classes of normalized convex and close-to-convex univalent functions. Associated with eachf∈C there is a collectionK (f) of functionsg∈K such thatf is close-to-convex with respect tog. A characterization ofK (f) is given in terms of the radial limits of arg {z f' (z)}, and necessary and sufficient conditions are obtained onf forK (f) to be a singleton. It is shown that for eachg∈K there is anf∈C such thatK (f)={g}. Further, a characterization is given of those functionsf for whichK (f) consists only of the half-plane mapping,g β(z)=z/(1-ze −iβ). These results are used to determine the extreme points ofC in the linear space introduced byH. Hornich (Mh. Math.73, 36–45 (1969)). It is shown that iff is an extreme point ofC, thenK (f)={g β} for some β. Finally, a geometric description is given of those functionsf∈C for whichg β∈K (f).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01534866
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Seedling Emergence as Related to Temperature and Moisture Tension 1 (1978)
    Wiley
    Details
    Publication Date: 1978-09-01
    Print ISSN: 0002-1962
    Electronic ISSN: 1435-0645
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley
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    PAPER CURRENT
  • 3
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    Atomic Diamagnetism: Quasi Landau Spectrum near the Ionization Threshold (1978)
    American Physical Society
    Details
    Publication Date: 1978-05-22
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society
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    PAPER CURRENT
  • 4
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    Lodging studies in Lolium perenne grown for seed: 1. Seed yield and seed yield components (1978)
    Cambridge University Press
    Details
    Publication Date: 1978-04-01
    Description: SummaryThe effects of lodging on the seed yield of S. 23 and S. 24 perennial ryegrass were investigated in a series of field experiments from 1973 to 1976. Natural lodging severely reduced seed yield in all years as a result of a decrease in the number of seeds per unit area. Controlled lodging at different stages of crop growth produced more variable results, indicating that lodging may affect both pollination and seed development. Disturbance of the crop during anthesis in order to aid pollination did not improve seed yields, possibly as a result of damage incurred.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
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    PAPER CURRENT
  • 5
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    Measurement of the ozone profile in support of STRATCOM (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: A rocket carrying an optical ozonesonde was launched at 1822 GMT on Sept. 29, 1977 in support of the STRATCOM 8 balloon. The integral ozone amount above the balloon ceiling altitude of 40 km was measured as .0117 atm-cm with an uncertainty less than + or - 7%. The ozone density at 40 km was 6.77 x 10 to the 17th power mol/cu m. Ozone densities in molecules/cu m at higher altitudes were 2.28 x 10 to the 17th power at 45 km, 6.72 x 10 to the 16th power at 50 km, 2.20 x 10 to the 16th power at 55 km, and 7.26 x 10 to the 15th power at 60 km. In addition, the ozone distribution was measured at lower altitudes from the tropopause at 17 km to 40 km.
    Keywords: GEOPHYSICS
    Type: STRATCOM 8 Data Workshop and Suppl.; p 49-55
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Rocket ozone sounding network data (1978)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: During the period December 1976 through February 1977, three regular monthly ozone profiles were measured at Wallops Flight Center, two special soundings were taken at Antigua, West Indies, and at the Churchill Research Range, monthly activities were initiated to establish stratospheric ozone climatology. This report presents the data results and flight profiles for the period covered.
    Keywords: GEOPHYSICS
    Type: NASA-TM-69365
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Hydrogen turbine power conversion system assessment (1978)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A three part technical study was conducted whereby parametric technical and economic feasibility data were developed on several power conversion systems suitable for the generation of central station electric power through the combustion of hydrogen and the use of the resulting heat energy in turbogenerator equipment. The study assessed potential applications of hydrogen-fueled power conversion systems and identified the three most promising candidates: (1) Ericsson Cycle, (2) gas turbine, and (3) direct steam injection system for fossil fuel as well as nuclear powerplants. A technical and economic evaluation was performed on the three systems from which the direct injection system (fossil fuel only) was selected for a preliminary conceptual design of an integrated hydrogen-fired power conversion system.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-135298 , RI/RD77-252
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    20/30 GHz satellite systems technology needs assessment (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The paper surveys the system and market work done at NASA-Lewis with regard to exploring the potential of the 20/30 GHz bands for domestic satellite communications. The 20/30 GHz bands appear attractive economically and, with certain technology advances, appear to offer a virtually unlimited spectrum resource. This attractiveness is especially relevant to high density trunking where there is sufficient traffic to justify dual-station site diversity. Ongoing system and market studies actively involve satellite system suppliers and carriers as well as the government in a cooperative, mutually beneficial effort. It is considered that this is the approach most likely to result in a spectrum-efficient acceptable-risk high-capacity 30/30 GHz satellite system which is relevant to anticipated markets.
    Keywords: COMMUNICATIONS AND RADAR
    Type: Instrument Society of America, International Telemetering Conference; Nov 14, 1978 - Nov 16, 1978; Los Angeles, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Comparisons of the in-situ measurements from the rocket Nimbus satellite comparison series II (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Atmospheric measurements between 30 and 90 km using two rocket-borne techniques - the inflatable falling sphere and the acoustic grenade - are compared in order to determine temperature measurement compatibility. The falling sphere, deployed at 115 km, is tracked by precision radar to determine winds as well as accurate drag parameters needed to deduce density from which temperatures are derived. The acoustic grenade technique uses sound arrivals at the ground from grenades ejected at 2-km intervals to determine temperature and wind between 40 and 90 km. The available data were obtained during an in-situ techniques-comparison with the remote sounders aboard Nimbus 6 during the summer and winter of 1975.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Plenary Meeting; May 29, 1978 - Jun 10, 1978; Innsbruck; Austria
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    The 20/30 GHz satellite systems technology needs assessment (1978)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Rain attenuation in the 20/30 GHz bands, and the resultant impact on system user costs were estimated for a variety of satellite communication system concepts. Results of previous and current NASA Lewis contractual and in-house studies on system design are reported as well as market studies conducted to evaluate the concepts and test their relevancy against forecasted market needs. The 20/30 GHz bands appear attractive economically and, with certain technology, appear to offer a virtually unlimited spectrum resource. This attractiveness is especially relevant to high density trunking where there is sufficient traffic to justify dual-station site diversity.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-TM-78975 , E-9750 , Intern. Telemetry Conf.; Nov 14, 1978 - Nov 16, 1978; Los Angeles
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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