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  • 1
    Electronic Resource
    Electronic Resource
    Emergence chronology of brook charr,Salvenus fontinalis, alevins in an acidic stream (1991)
    Springer
    Environmental biology of fishes 31 (1991), S. 25-31 
    Details
    ISSN: 1573-5133
    Keywords: Acidic deposition ; Snowmelt runoff ; Stream pH depressions ; Early life history ; Salmonid fish
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The emergence chronology of brook charr alevins in the Chikanishing River, Ontario, Canada and the concurrent changes in stream chemistry resulting from acidic snowmelt runoff were examined during the spring, 1986–1988. Emergence patterns were similar among years with the most intense emergence (〉 70%) occurring during the declining stream discharge following the spring flood. This period coincided with stream pH depressions (minimum pH 5.2) in 2 of 3 years, suggesting emergence behaviour frequently subjects the earliest free-swimming life interval of brook charr to episodic acidification events.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00002155
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Nonlinear estimation with quantized measurements - PCM predictive quantization, and data compression (1968)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Nonlinear estimation with quantized measurements and application to pulse code modulation, data compression, and predictive quantization
    Keywords: COMMUNICATIONS
    Type: NASA-CR-97197 , RE-45
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Limited flight test experience with a laser transit velocimeter (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Limited flight testing of a laser transit velocimeter provided insight into the problems associated with the use of such instruments for flight research. Although the device tested was not designed for flight application, it had certain features such as fiber optics and low laser power which are attractive in the airborne environment. During these tests, operation of the velocimeter was limited by insufficient concentrations of light-scattering particles and background light interference. Normal operation was observed when these conditions were corrected by utilizing cloud particles and flying at night. A comparison between the laser flow velocity measurements and corresponding pressure measurements is presented and shows a coarse correlation. Statistical bias due to turbulence in the flow is suspected to have affected the laser measurements.
    Keywords: AERODYNAMICS
    Type: NASA-TM-84896 , NAS 1.15:84896
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Utilization of the wing-body aerodynamic analysis program (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The analysis program was used to investigate several aircraft characteristics. The studies performed included vehicle stability analysis, determination of upwash angle, identification of nonpotential flow, launch dynamics, and wake vortex upset loads. The techniques and are discussed. When possible, computed results are compared with experimental data.
    Keywords: AERODYNAMICS
    Type: NASA-TM-72856 , H-1071
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    The use of oil for in-flight flow visualization (1984)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Oil was used to visualize inflight aerodynamic characteristics such as boundary layer transition, shock wave location, regions of separated flow, and surface flow direction. The technique, which is similar to wind tunnel oil-flow testing, involves an oil mixture to test aircraft before takeoff. After takeoff, the airplane climbs immediately to the test altitude and photographs are taken. The developmental experience is summarized, several examples of inflight oil-flow photographs are presented and discussed, and an approach for potential users of the technique is presented.
    Keywords: AERODYNAMICS
    Type: NASA-TM-84915 , H-1195 , NAS 1.15:84915 , Ann. Symp. of the Soc. of Flight Test Engr.; Aug 15, 1983 - Aug 19, 1983; Newport Beach, Ca; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Ground-effect analysis of a jet transport airplane (1984)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: An analysis of the ground effect of a jet transport airplane has been made. Data were obtained from recent flight tests primarily using the constant angle-of-attack approach technique. Reasonable results were obtained for ground-effect pitching moment and lift increments. These were compared with data from other sources, including computations, wind tunnel, and previous flight test. A recommended ground-effect model was developed from the results. A brief simulator study was conducted to determine the sensitivity of a particular configuration to this ground-effect model and its associated uncertainty.
    Keywords: AERODYNAMICS
    Type: NASA-TM-85920 , H-1273 , NAS 1.15:85920 , AIAA PAPER 85-0307 , AIAA Aerospace Sci. Meeting; Jan 14, 1985 - Jan 17, 1985; Reno, NV; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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