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  • PROPULSION SYSTEMS  (6)
  • 82.40 Z  (1)
  • Crop evolution  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Scattering and chlorine absorption in discharge-pumped XeCl excimer lasers (1991)
    Springer
    Applied physics 52 (1991), S. 262-265 
    Details
    ISSN: 1432-0649
    Keywords: 42.55 G ; 82.40 Z
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Scattering microparticles were found to determine the characteristic behavior of the laser energy of discharge pumped XeCl excimer lasers with aluminium electrodes. All experimental results indicate that sputtered aluminium reacts with chlorine, a constituent of the laser gas, and forms aluminium chloride particles. Chlorine was observed to be formed by a reaction of oxygen, contained as an impurity, with the halogen donor hydrogen chloride under discharge conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325402
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Allozyme diversity in wild Phaseolus vulgaris: further evidence for two major centers of genetic diversity (1989)
    Springer
    Theoretical and applied genetics 78 (1989), S. 809-817 
    Details
    ISSN: 1432-2242
    Keywords: Crop evolution ; Domestication ; Molecular markers ; Common bean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Allozyme analysis was performed on 83 wild Phaseolus vulgaris accessions, representing a wide geographical distribution from Mesoamerica to Argentina, to determine levels of genetic diversity and geographic patterns of variability at nine polymorphic isozyme loci. The collection can be divided into two major groups, one consisting of accessions from Mexico, Central America, Colombia and Peru, and the other consisting of accessions from Peru and Argentina. One accession from northern Peru is distinct from the two major groups, and may delineate a transition zone between the two divergent groups. The level of genetic diversity within wild P. vulgaris (Ht=0.132) is comparable with those found in other Phaseolus species. There was no significant within-accession gene diversity (Hs=0.006); however, there is a moderate level of genetic diversity (Dst=0.126) between accessions. Our results are consistent with previous studies on the genetic diversity of wild P. vulgaris using phaseolin, the major seed storage protein of beans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266663
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    Paper (German National Licenses)
    Fulltext
  • 3
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    STOL propulsion systems (1972)
    In:  CASI
    Details
    Publication Date: 2006-03-27
    Description: The selection and the characteristics of quiet, clean propulsion systems for STOL aircraft are discussed. Engines are evaluated for augmentor wing and externally blown flap STOL aircraft with the engines located both under and over the wings. Some supporting test data are presented. Optimum engines are selected based on achieving the performance, economic, acoustic, and pollution goals presently being considered for future STOL aircraft. The data and results presented were obtained from a number of contracted studies and some supporting NASA inhouse programs, most of which began in early 1972. The contracts include: (1) two aircraft and mission studies, (2) two propulsion system studies, (3) the experimental and analytic work on the augmentor wing, and (4) the experimental programs on Q-Fan. Engines are selected and discussed based on aircraft economics using the direct operating cost as the primary criterion. This cost includes the cost of the crew, fuel, aircraft, and engine maintenance and depreciation.
    Keywords: PROPULSION SYSTEMS
    Type: STOL Technol.; p 475-509
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    GENENG 2: A program for calculating design and off-design performance of two- and three-spool turbofans with as many as three nozzles (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A computer program which calculates steady-state design and off-design jet engine performance for two- or three-spool turbofans with one, two, or three nozzles is described. Included in the report are complete FORTRAN 4 listings of the program with sample results for nine basic turbofan engines that can be calculated: (1) three-spool, three-stream engine; (2) two-spool, three-stream, boosted-fan engine; (3) two-spool, three-stream, supercharged-compressor engine; (4) three-spool, two-stream engine; (5) two-spool, two-stream engine; (6) three-spool, three-stream, aft-fan engine; (7) two-spool, three-stream, aft-fan engine; (8) two-spool, two-stream, aft-engine; and (9) three-spool, two-stream, aft-fan engine. The simulation of other engines by using logical variables built into the program is also described.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-TN-D-6553 , E-6356
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    GENENG: A program for calculating design and off-design performance for turbojet and turbofan engines (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A computer program entitled GENENG employs component performance maps to perform analytical, steady state, engine cycle calculations. Through a scaling procedure, each of the component maps can be used to represent a family of maps (different design values of pressure ratios, efficiency, weight flow, etc.) Either convergent or convergent-divergent nozzles may be used. Included is a complete FORTRAN 4 listing of the program. Sample results and input explanations are shown for one-spool and two-spool turbojets and two-spool separate- and mixed-flow turbofans operating at design and off-design conditions.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-TN-D-6552 , E-5867
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Inlet sensitivity study for a supersonic transport (1967)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Method of comparing inlet performance and weight compromises for supersonic transport
    Keywords: PROPULSION SYSTEMS
    Type: NASA-TN-D-3881
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Sensitivity of subsonic transport range to turbofan engine design (1969)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Sensitivity of subsonic transport range to turbofan engine design
    Keywords: PROPULSION SYSTEMS
    Type: NASA-TM-X-52603
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Influence of high-turbine inlet temperature engines in a methane-fueled SST when takeoff jet noise limits are considered (1968)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Afterburning turbojet, nonafterburning turbojet, and duct burning turbofan designs for supersonic transports with and without takeoff noise constraints
    Keywords: PROPULSION SYSTEMS
    Type: NASA-TN-D-4965
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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