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  • METEOROLOGY AND CLIMATOLOGY  (5)
  • EARTH RESOURCES AND REMOTE SENSING  (2)
  • Isoptera  (2)
  • OCEANOGRAPHY  (2)
  • 1980-1984  (11)
  • 1981  (9)
  • 1980  (2)
Collection
Keywords
Publisher
Years
  • 1980-1984  (11)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Soldier-specific chemicals of the termiteCurvitermes strictinasus Mathews (Isoptera, Nasutitermitinae) (1981)
    Springer
    Journal of chemical ecology 7 (1981), S. 127-133 
    Details
    ISSN: 1573-1561
    Keywords: Isoptera ; Nasutitermitinae ; isolation ; identification ; Curvitermes strictinasus (Mathews) ; defense secretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The defense secretion of the soldier termites ofCurvitermes strictinasus Mathews has been analyzed. Seven components have been isolated and identified, including limonene, terpinolene,p-cymen-8-ol, tridecan-2-one, tridecen-2-onecis,trans-farnesal, andtrans,trans-farnesal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988640
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Chemical composition of the frontal gland secretion ofSyntermes soldiers (Isoptera, Termitidae) (1981)
    Springer
    Journal of chemical ecology 7 (1981), S. 135-145 
    Details
    ISSN: 1573-1561
    Keywords: Isoptera ; Nasutitermitinae ; Syntermes species ; defensive secretion ; isolation ; identification ; terpenoid compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The defensive secretions from the frontal glands of soldier termites of the genusSyntermes contain similar mixtures of mono- and sesquiterpene hydrocarbons. The major components inS. dirus, S. molestus, S. brevimalatus, S. peruanus, and a new species (Syntermes sp. n), iscis-β-ocimene. A substantial amount of aristolochene is found inSyntermes sp. n. and is present at lower levels in all the other species;S. brevimalatus contains onlycis-β-ocimene and aristolochene. The four other species also contain minor amounts of epi-α-selinene and germacrene A. The latter compound has been identified on the basis of its rearrangement product β-elemene. The termiteS. grandis differed markedly from the otherSyntermes species in that no terpenoid components were found in the soldier extract. With the obvious exception ofS. grandis, the same soldier-specific mono- and sesquiterpenes occurred in all species. The total amount of secretion per unit weight of soldiers varies with the species and is inversely proportional to the development of the mandibular apparatus. InS. molestus smaller gland size is compensated for by a greater number of soldiers foraging trails.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988641
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    Paper (German National Licenses)
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  • 3
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    Some characteristics and advantages of LANDSAT 3 return beam vidicon images (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: One advantage of a LANDSAT 3 return beam vidicon (RBV) scene is the synoptic view it provides. A 1:500,000 paper print of the size 19.4 cm x 19.4 cm encompasses an area of about 3,721 square miles (9,637 sq. km.) and this compares very favorably in coverage to small scale aerial photography. A second important advantage is that the ground resolution is 38 by 38 meters. Compared to the resolution of the MSS which is 79 by 79 meters the RBV provides a wealth of detail useful for many purposes. A great variety of man made structures are visible including bridges, roads, docks, and small airfields. Agricultural field patterns are clear and settlements of various sizes can be identified and delineated. A third advantage is related to the approximate panchromatic spectral response displayed in RBV images. Since many aerial photographic interpreters are accustomed to working with panchromatic photographs, they should have no difficulty understanding and putting RBV images immediately into use.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Purdue Univ. CORSE-81: The 1981 Conf. on Remote Sensing Educ.; p 84-85
    Format: text
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  • 4
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    Numerical prediction of the monsoon depression of 5-7 July 1979 (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: A well defined monsoon depression was used for two assimilation and forecast experiments: (1) using conventional surface and upper air data, (2) using these data plus Monex data. The data sets were assimilated and used with a general circulation model to make numerical predictions. The model, the analysis and assimilation procedure, the differences in the analyses due to different data inputs, and the differences in the numerical predictions are described. The MONEX data have a positive impact, although the differences after 24 hr are not significant. The MONEX assimilation does not agree with manual analysis location of depression center. The 2.5 x 3 deg horizontal resolution of the prediction model is too coarse. The assimilation of geopotential height data derived from satellite soundings generated gravity waves with amplitudes similar to the meteorologically significant features investigated.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: WMO Intern. Conf. on Early Results of FGGE and Large-Scale Aspects of its Monsoon Expt.; 8 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    The role of zonally asymmetric heating in the vertical and temporal structure of the global scale flow fields during FGGE SOP-1 (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: By examining the vertical structure of the low order spherical harmonics of the divergence and vorticity fields, the relative contribution of tropical and monsoonal circulations upon the global wind fields was estimated. This indicates that the overall flow over North America and the Pacific between January and February is quite distinct both in the lower and upper troposphere. In these longitudes there is a stronger tropical overturning and subtropical jet stream in January than February. The divergent flow reversed between 850 and 200 mb. Poleward rotational flow at upper levels is associated with an equatorward rotational flow at low levels. This suggests that the monsoon and other tropical circulations project more amplitude upon low order (global scale) representations of the flow than do the typical midlatitude circulations and that their structures show conspicuous changes on a time scale of a week or less.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: WMO Intern. Conf. on Early Results of FGGE and Large-Scale Aspects of its Monsoon Expt.; 9 p
    Format: text
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  • 6
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    Numerical prediction of the monsoon depression of 5-7 July, 1979 (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The objective analysis and assimilation procedure with the FGGE/MONEX data are described. Numerical predictions with the GLAS general circulation model were made from the two initial conditions arrived at by assimilating the two different data sets. The model, the analysis and assimilation procedure, the differences in the analyses due to different data inputs, and the differences in the numerical prediction of monsoon depressions are outlined.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Modeling and Simulation Facility: Res. Rev., 1980 - 1981; p 223-230
    Format: text
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  • 7
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    The state of the atmosphere as inferred from the FGGE satellite observing systems during SOP-1 (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The statistical properties, and coverage, of satellite temperature sounding data are described. Tropical regions are observed every two days, extratropics from one to four times a day. Oceans are covered two to three times a day. Asynoptic coverage is comparable to the U.S. rawinsonde network twice daily coverage. Lack of ground truth for data sparse areas makes accuracy difficult to assess. The rms differences of layer mean temperatures obtained from collocating rawinsonde observations with satellite temperature profiles in space and time differ from rms differences of layer mean satellite temperature soundings. The FGGE satellite systems can infer the three dimensional motion field and improve the representation of the large scale state of the atmosphere.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: WMO Intern. Conf on Early Results of FGGE and Large-Scale Aspects of its Monsoon Expt.; 15 p
    Format: text
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  • 8
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    Numerical prediction of the large scale tropical flow (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The mean error characteristics of two series of forecasts of the tropical flow were studied. By using as initial conditions analyses made with and without the FGGE special observing system, the impact that initial data has on the accuracy of the forecasts is estimated.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Modeling and Simulation Facility: Res. Rev., 1980 - 1981; p 37-45
    Format: text
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  • 9
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    Nimbus-7 coastal zone color scanner - System description and initial imagery (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Initial imagery from the Nimbus-7 Coastal Zone Color Scanner (CZCS) shows subtle variations in water color. Organisms, especially phytoplankton, play a major influence on the variations in water color. Processing of the visual data is described, and in particular, the use of an algorithm to remove aerosol from the image is discussed. Data on the six spectral bands (433-12,500 nm) are presented and comparisons are made between the CZCS and the Landsat-1 multispectral scanner. The implications for management of fisheries is noted.
    Keywords: OCEANOGRAPHY
    Type: Science; 210; Oct. 3
    Format: text
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  • 10
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    Winter wheat: A model for the simulation of growth and yield in winter wheat (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The basic ideas and constructs for a general physical/physiological process level winter wheat simulation model are documented. It is a materials balance model which calculates daily increments of photosynthate production and respiratory losses in the crop canopy. The partitioning of the resulting dry matter to the active growing tissues in the plant each day, transpiration and the uptake of nitrogen from the soil profile are simulated. It incorporates the RHIZOS model which simulates, in two dimensions, the movement of water, roots, and soluble nutrients through the soil profile. It records the time of initiation of each of the plant organs. These phenological events are calculated from temperature functions with delays resulting from physiological stress. Stress is defined mathematically as an imbalance in the metabolite supply; demand ratio. Physiological stress is also the basis for the calculation of rates of tiller and floret abortion. Thus, tillering and head differentiation are modeled as the resulants of the two processes, morphogenesis and abortion, which may be occurring simulaneously.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E82-10367 , NASA-CR-169164 , YM-U2-04281 , JSC-18229 , NAS 1.26:169164
    Format: application/pdf
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