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  • GEOPHYSICS  (474)
  • Inorganic Chemistry  (42)
  • Animals
  • 1980-1984
  • 1970-1974  (516)
  • 1973  (516)
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  • 1980-1984
  • 1970-1974  (516)
Year
  • 1
    Publication Date: 2019-07-13
    Description: Research activities on geologic remote sensing applications for Colorado are summarized. Projects include: regional and detailed geologic mapping, surficial and engineering geology, fracture studies, uranium exploration, hydrology, and data reduction and enhancement. The acquisition of remote sensor data is also discussed.
    Keywords: GEOPHYSICS
    Type: NASA-CR-137363 , REPT-73-4
    Format: application/pdf
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  • 2
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. Topography was found to be the most important factor defining folds on ERTS-1 imagery of northwestern Colorado; tonal variations caused by rock reflectance and vegetation type and density are the next most important factors. Photo-linears mapped on ERTS-1 imagery of central Colorado correlate well with ground-measured joint and fracture trends. In addition, photo-linears have been successfully used to determine the location and distribution of metallic mineral deposits in the Colorado Mineral Belt. True color composites are best for general geologic analysis and false color composites prepared with positive/negative masks are useful for enhancing local geologic phenomena. During geologic analysis of any given area, ERTS-1 imagery from several different dates should be studied.
    Keywords: GEOPHYSICS
    Type: E74-10330 , NASA-CR-136825 , REPT-73-5 , PR-9
    Format: application/pdf
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  • 3
    Publication Date: 2016-06-07
    Description: A combination of infrared images depicting areas of thermal emission and ground calibration points have proved to be particularly useful in plotting time-dependent changes in surface temperatures and radiance and in delimiting areas of predominantly convective heat flow to the earth's surface in the Cascade Range and on Surtsey Volcano, Iceland. In an integrated experiment group using ERTS-1 multispectral scanner (MSS) and aircraft infrared imaging systems in conjunction with multiple thermistor arrays, volcano surface temperatures are relayed daily to Washington via data communication platform (DCP) transmitters and ERTS-1. ERTS-1 MSS imagery has revealed curvilinear structures at Lassen, the full extent of which have not been previously mapped. Interestingly, the major surface thermal manifestations at Lassen are aligned along these structures, particularly in the Warner Valley.
    Keywords: GEOPHYSICS
    Type: Symp. on Significant Results obtained from the ERTS-1, Vol. 1, Sect. A and B; p 1549-1560
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  • 4
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. Large scale sediment plumes from intermittent streams and rivers form detectable seasonal patterns on ERTS-1 imagery. The ocean current systems, as plotted from three California coast ERTS mosaics, were identified. Offshore patterns of sediment in areas such as the Santa Barbara Channel are traceable. These patterns extend offshore to heretofore unanticipated ranges as shown on the ERTS-1 imagery. Flying spot scanner enhancements of NASA tapes resulted in details of subtle and often invisible (to the eye) nearshore features. The suspended sediments off San Francisco and in Monterey Bay are emphasized in detail. These are areas of extremely changeable offshore sediment transport patterns. Computer generated contouring of radiance levels resulted in maps that can be used in determining surface and nearsurface suspended sediment distribution. Tentative calibrations of ERTS-1 spectral brightness against sediment load have been made using shipboard measurements. Information from the combined enhancement and interpretation techniques is applicable to operational coastal engineering programs.
    Keywords: GEOPHYSICS
    Type: E74-10079 , NASA-CR-135824
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  • 5
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10011 , NASA-CR-135852 , ERTS-1-1-5 , PR-5
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  • 6
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. Remote sensor aircraft flights took place simultaneously with ERTS-1 overpasses at the San Francisco, Monterey Bay, and Santa Barbara test cells. The cameras and scanners used were configured for detecting suspended sediment and for maximum water penetration. The Ektachrome/Wratten 12 photographs which were intentionally overexposed 1-1/2 stops were found to show the most extensive sediment transport detail. Minus blue/K 2 photographs illustrate nearshore underwater bottom detail including the head of the Mugu submarine canyon. The EMSIDE 9 channel scanner was employed to classify and differentiate suspended sediment, oil, kelp, and other materials found in the nearshore area. Processing of bulk ERTS-1 computer compatible tapes was utilized to enhance and analyze nearshore sediments. This technique was most successful in enhancing subtle nearshore features found to be faint or invisible on prints made from the supplied negatives. In addition to this continuing computer process, an effort was initiated to interface density values from the bulk tapes into contouring and mapping software.
    Keywords: GEOPHYSICS
    Type: E73-10525 , NASA-CR-131492 , ERTS-1-I-3
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  • 7
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. This report contains the techniques used for enhancing and analyzing nearshore processes from ERTS-1 and aircraft data. Four California nearshore sites are used as test cells including the San Francisco area, Monterey Bay, Santa Barbara Channel, and Los Angeles area. Techniques used for analyzing the test cells included direct photographic processing, computer compatible tape gain change enhancement, discrete point density analysis and plotting, and densitometer enhancement. Using these methods, it is possible to measure the seaward extent of the suspended sediment transport and to differentiate sediment levels within the individual sediment lobes. The movement of riverine discharged suspensates and coastal sediments by currents was an intricate part of the sediment transport analysis. The larger estuaries in the test cell areas were also studied for flushing characteristics.
    Keywords: GEOPHYSICS
    Type: E73-10375 , NASA-CR-131016 , ERTS-1-2-1
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  • 8
    Publication Date: 2019-08-13
    Description: The objective of the experiment was to evaluate the use of advanced remote sensing techniques to detect the development and spread of southern corn leaf blight during the growing season across the Corn Belt region. The sampling plan involved the selection of the study area, the determination of the flightline, and the determination of a field sample design. Aspects of data acquisition are discussed, giving attention to ground data collection and aerial data collection. Details of data flow are considered along with data analysis procedures and corn blight records. The experiment results are examined, taking into account photointerpretation results, the machine analysis of multispectral scanner data results, the influence of blight on yields, and questions of crop identification.
    Keywords: GEOPHYSICS
    Type: International Symposium on Remote Sensing of Environment; Oct 02, 1972 - Oct 06, 1972; Ann Arbor, MI
    Format: text
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  • 9
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. During the period 1 May to 30 June 1973 material was processed and interpreted for use in analyzing the three ocean seasons along the California coast. ERTS imagery from the first season of the year, called the Davidson Current period, was mosaiced and analyzed. The second season of the year, the Upwelling period, was mosaiced and interpretation was initiated. Imagery for the third ocean season, the Oceanic period, is being collected for future study.
    Keywords: GEOPHYSICS
    Type: E73-10727 , NASA-CR-133071 , ERTS-1-1-4 , PR-4
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 399 (1973), S. 77-86 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Sulphur. 113. The Effect of Impurities on the Electrical Conductivity of Molten SulphurThe electrical conductivity of molten sulfur in the range up to 200°C was analysed on samples which were specially purified as well as doped with paraffin, phenanthrene, benzidine, benzil, bromine, and iodine.The current flow below 160°C results from electrophoretically migrating impurities and by interaction with the impurities ionized molecules, whereas at higher temperatures conduction is caused by electrons. At the minimum of viscosity of the molten sulfur (154,5°C) the conductivity shows a maximum, which is shifted by impurities especially halogens up to 10°C towards lower temperatures. The relation between the electrophoretic conduction in the sulfur melt and the viscosity, which determines the mobility of the charged particles, is discussed.
    Notes: Die elektrische Leitfähigkeit des flüssigen Schwefels im Temperaturbereich bis 200°C wurde an nach verschiedenen Verfahren gereinigten und an mit Paraffin, Phenanthren, Benzidin, Benzil, Methandithiol sowie Brom und Jod dotierten Proben untersucht. Während bei höheren Temperaturen Elektronenleitung vorliegt, erfolgt der Ladungstransport unterhalb von 160°C, und zwar auch bei den reinsten heute darstellbaren Schwefelproben, durch elektrophoretisch wandernde Verunreinigungsteilchen bzw. In Wechselwirkung mit den Verunreinigungen ionisierte Schwefelmolekeln. Im Bereich des Viskositätsminimums der Schwefelschmelze (154,5°C) besitzt die Leitfähigkeit ein Maximum, das jedoch durch Beimengungen, insbesondere von Halogenen, auf bis zu 10°C niedrigere Temperaturen verschoben wird. Der Zusammenhang zwischen der elektrophoretischen Leitung im Schwefel und der die Beweglichkeit der geladenen Teilchen bestimmenden Zähigkeit der Schmelze wird diskutiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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