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  • American Physical Society  (170)
  • National Academy of Sciences  (38)
  • Cambridge University Press  (33)
  • American Physical Society (APS)
  • Copernicus
  • Wiley-Blackwell
  • 2020-2022  (138)
  • 1970-1974  (86)
  • 1965-1969  (54)
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  • 1
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    CryoSat Ice Baseline-D validation and evolutions (2020)
    Copernicus
    In:  EPIC3The Cryosphere, Copernicus, 14(6), pp. 1889-1907, ISSN: 1994-0424
    Details
    Publication Date: 2020-07-08
    Description: The ESA Earth Explorer CryoSat-2 was launched on 8 April 2010 to monitor the precise changes in the thickness of terrestrial ice sheets and marine floating ice. To do that, CryoSat orbits the planet at an altitude of around 720 km with a retrograde orbit inclination of 92∘ and a quasi repeat cycle of 369 d (30 d subcycle). To reach the mission goals, the CryoSat products have to meet the highest quality standards to date, achieved through continual improvements of the operational processing chains. The new CryoSat Ice Baseline-D, in operation since 27 May 2019, represents a major processor upgrade with respect to the previous Ice Baseline-C. Over land ice the new Baseline-D provides better results with respect to the previous baseline when comparing the data to a reference elevation model over the Austfonna ice cap region, improving the ascending and descending crossover statistics from 1.9 to 0.1 m. The improved processing of the star tracker measurements implemented in Baseline-D has led to a reduction in the standard deviation of the point-to-point comparison with the previous star tracker processing method implemented in Baseline-C from 3.8 to 3.7 m. Over sea ice, Baseline-D improves the quality of the retrieved heights inside and at the boundaries of the synthetic aperture radar interferometric (SARIn or SIN) acquisition mask, removing the negative freeboard pattern which is beneficial not only for freeboard retrieval but also for any application that exploits the phase information from SARIn Level 1B (L1B) products. In addition, scatter comparisons with the Beaufort Gyre Exploration Project (BGEP; https://www.whoi.edu/beaufortgyre, last access: October 2019) and Operation IceBridge (OIB; Kurtz et al., 2013) in situ measurements confirm the improvements in the Baseline-D freeboard product quality. Relative to OIB, the Baseline-D freeboard mean bias is reduced by about 8 cm, which roughly corresponds to a 60 % decrease with respect to Baseline-C. The BGEP data indicate a similar tendency with a mean draft bias lowered from 0.85 to −0.14 m. For the two in situ datasets, the root mean square deviation (RMSD) is also well reduced from 14 to 11 cm for OIB and by a factor of 2 for the BGEP. Observations over inland waters show a slight increase in the percentage of good observations in Baseline-D, generally around 5 %–10 % for most lakes. This paper provides an overview of the new Level 1 and Level 2 (L2) CryoSat Ice Baseline-D evolutions and related data quality assessment, based on results obtained from analyzing the 6-month Baseline-D test dataset released to CryoSat expert users prior to the final transfer to operations.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 2
    Electronic Resource
    Electronic Resource
    The Administrative Service of Malawi — a Case Study in Africanisation (1972)
    Cambridge : Cambridge University Press
    The @journal of modern African studies 10 (1972), S. 543-560 
    Details
    ISSN: 0022-278X
    Source: Cambridge Journals Digital Archives
    Topics: Ethnic Sciences , History , Political Science , Economics
    Notes: Malawi has her origins, as a separate state, in the British Central Africa Protectorate, declared in 1891 to prevent the Portuguese from claiming the Lake Malawi region. In 1907 the Protectorate was renamed Nyasaland, a title which was retained until independence in 1964. It is with the few years before independence, and the eight years since, that this article is concerned, and it deals with the Africanisation of the Administrative Service during this period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0022278X00022825
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Irschick, Eugene F.: Politics and Social Conflict in South India: The Non-Brahmin Movement and Tamil Separatism, 1916–1929 : Berkeley and Los Angeles, University of California Press, 1969 (1971)
    Cambridge : Cambridge University Press
    Modern Asian studies 5 (1971), S. 276-278 
    Details
    ISSN: 0026-749X
    Source: Cambridge Journals Digital Archives
    Topics: Ethnic Sciences , History , Political Science , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0026749X00003073
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  • 4
    Electronic Resource
    Electronic Resource
    Irschick, Eugene F.: Politics and Social Conflict in South India: The Non-Brahmin Movement and Tamil Separatism, 1916–1929 : Berkeley and Los Angeles, University of California Press, 1969 (1971)
    Cambridge : Cambridge University Press
    Modern Asian studies 5 (1971), S. 276-278 
    Details
    ISSN: 0026-749X
    Source: Cambridge Journals Digital Archives
    Topics: Ethnic Sciences , History , Political Science , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0026749X00004066
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  • 5
    Electronic Resource
    Electronic Resource
    Pasternak, Burton: Kinship and Community in Two Chinese Villages : Stanford, Calif., Stanford University Press, 1972 (1973)
    Cambridge : Cambridge University Press
    The @China quarterly 55 (1973), S. 575-577 
    Details
    ISSN: 0305-7410
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies , History , Political Science , Sociology , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0305741000009218
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  • 6
    Electronic Resource
    Electronic Resource
    Berkowitz, Morris I.; Brandauer, Frederick P.; Reed, John H.: Folk Religion in an Urban Setting: a Study of Hakka Villagers in Transition : Hong Kong, Christian Study Centre, 1969 (1970)
    Cambridge : Cambridge University Press
    The @China quarterly 43 (1970), S. 151-152 
    Details
    ISSN: 0305-7410
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies , History , Political Science , Sociology , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0305741000044866
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  • 7
    Electronic Resource
    Electronic Resource
    The American Society of African Culture (1966)
    Cambridge : Cambridge University Press
    The @journal of modern African studies 4 (1966), S. 367-369 
    Details
    ISSN: 0022-278X
    Source: Cambridge Journals Digital Archives
    Topics: Ethnic Sciences , History , Political Science , Economics
    Notes: It is supposed that most readers of The Journal of Modern African Studies know something of A.M.S.A.C., its origins, and the programmatic implementation of its purposes; if not, then certainly of its existence. Accordingly, only a summary recapitulation of the Society's history of origin will be made here.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0022278X00013550
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  • 8
    Electronic Resource
    Electronic Resource
    Molecular formation and electron correlation in HeH+ (1970)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 4 (1970), S. 431-450 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A one-centre CI wave function for HeH+ reported by Stuart and Matsen for 0.1 ≤ R ≤ 5.0 has been analysed in detail from the viewpoint of molecular formation. Further, by means of a natural orbital analysis, it was possible to obtain some measure of the electron correlation contained within such wave functions for various R values. These effects were illustrated by means of a series of difference maps for the electron density. One- and two-particle expectation values were obtained as a function of R. Thus, it was possible to study several aspects of the influence of the proton on the electron charge cloud as we pass from He through to the united atom Li+. The occupation numbers within the natural expansions were compared with those which arise from a similar analysis of a two-centre wave function for HeH+. The “character” of such wave functions for HeH+, and also for He and Li+, were analysed and compared.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560040409
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  • 9
    Electronic Resource
    Electronic Resource
    Finite element solution algorithm for viscous incompressible fluid dynamics (1973)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 6 (1973), S. 89-101 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A numerical solution algorithm employing the finite element concept of solid mechanics is derived for the transient laminar two-dimensional flow of an incompressible viscous fluid. Through dependent variable transformation, the problem is uniformly recast into the solution of a quasi-linear elliptic boundary value-problem, for which the finite element solution theory is established. The algorithm is uniquely user-oriented in accepting the generalized elliptic boundary condition specification of any non-coordinate-surface solution do main closure segment and on employing an arbitrarily irregular computational latticc. Numerical results are presented for several problems in internal flow illustrating solution accuracy, convergence, versatility and the ability to predict imbedded regions of recirculating flow.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620060110
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  • 10
    Electronic Resource
    Electronic Resource
    A rationale for the preparation of Loeb-Sourirajan-type cellulose acetate membranes (1971)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 15 (1971), S. 811-828 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: An attempt has been made to rationalize the variables in the preparation procedure of Loeb-Sourirajan-type reverse-osmosis membranes. The quaternary phase diagram of the system cellulose acetate-acetone-formamide-water was determined and has proved a useful tool in the discussion of membrane structures and properties. A mechanism based on differences in the precipitation rate of the polymer during the membrane formation process has been suggested to explain the observed asymmetry in the membrane structure. The porosity of the membrane has been ascribed to the relative rates of water entering and solvent leaving the cast film. The effects of the casting solution composition, the evaporation time, the wash bath temperature, and the annealing procedure have been studied. X-Ray diffraction and electron microscopy were used to supplement flux and retention data of membranes made from a cellulose acetate-formamide-acetone casting solution.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1971.070150404
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