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  • 1970-1974  (3)
  • 1950-1954  (5)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Accuracy in film-scanner intensity measurements (1970)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 26 (1970), S. 489-491 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The accuracy in X-ray diffraction intensities obtained by the use of an automatic IBM 1800-controlled SAAB film scanner is discussed. The random errors have been found to be around 4% of the intensities for most reflexions. By comparison with data obtained from a Joyce–Loebl microdensitometer it has been found that there are no serious systematic errors in the film-scanner data. Measurements from Weissenberg and precession films are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739470001286
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Prediction of partially recorded reflexions on screenless precession photographs (1973)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 29 (1973), S. 462-463 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Three-dimensionally valid equations for the prediction of partially recorded reflexions on screenless precession photographs are proposed. The equations are based on a discussion of the mosaic spread of the crystal. Applications to the collection of 5 Å resolution data from hexon, a surface protein in the shell of adenovirus [Franklin, R. M., Harrison, S. C., Pettersson, U., Philipson, L., Brändén, C. J. & Werner, P.-E. (1971). Cold Spring Harbor Symposia on Quantitative Biology. Vol. XXXVI, pp. 503-510] are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739473001117
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    Paper (German National Licenses)
    Fulltext
  • 3
    facet.materialart.
    Unknown
    Max Wehrli, Allgemeine Literaturwissenschaft (Book Review) (1953)
    Washington, etc. : Periodicals Archive Online (PAO)
    Germanic Review. 28:3 (1953:Oct.) 204 
    Details
    ISSN: 0016-8890
    Topics: German, Dutch and Scandinavian Studies
    Notes: BOOK REVIEWS
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:1091-1953-003-00-000006
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Vibration of finite water bodies with free surface (1952)
    Springer
    Pure and applied geophysics 22 (1952), S. 166-170 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The study deals with expansion waves in fluids, with particular reference to hydrodynamic earthquake effects. The current assumption of steady harmonic motion is compared with the assumption that the motion is discontinuous in the sense that it starts from the initial condition of rest. A numerical example shows that the impulsive start may have a considerable influence on the dynamic water pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01989634
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Vibration of hydraulic vessels (1952)
    Springer
    Pure and applied geophysics 23 (1952), S. 36-42 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The present paper is a continuation of a previous study by the author(1), dealing with expansion waves in fluids. Relating to hydro-dynamic effects due to harmonic vibrations, with special reference to earthquakes, it contains solutions for some rigid-walled vessels of geometrically determined shape. A salient feature of the problem is that the motion is assumed discontinuous in the sense that it starts from the initial condition of rest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01992455
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    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    On non-artesian groundwater flow (1953)
    Springer
    Pure and applied geophysics 25 (1953), S. 37-43 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The present paper deals with certain problems of non-artesian aquifers, with special reference to non-steady flow due to replenishment from the ground surface. Solutions are obtained by direct integration ofBoussinesq's differential equation (transformed), taking also the inclination of the groundwater surface and the slope of the bottom of the aquifer into account. — The study has some bearing on hydrological investigations. For example, it may be desired to find the location of a moving groundwater divide between two water courses, or to determine the quantity of groundwater passing between them. Problems of this nature are also often met with in water supply (artificial infiltration, etc.) and other fields of engineering practice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02014053
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    Paper (German National Licenses)
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  • 7
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    Unknown
    H. M. Waidson: Jeremias Gotthelf (Book Review) (1954)
    Syracuse, N.Y. : Periodicals Archive Online (PAO)
    Symposium. 8:1 (1954:Spring) 182 
    Details
    ISSN: 0039-7709
    Topics: Linguistics and Literary Studies
    Notes: REVIEWS
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:1222-1954-001-00-000023
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Die Sehfelder der zentralen Ommatidien in den Appositionsaugen von Apis mellifica und Cataglyphis bicolor (Apidae, Formicidae; Hymenoptera) (1972)
    Springer
    Biological cybernetics 10 (1972), S. 168-179 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract Experimental equipment has been developed to make possible continuous recordings of intensity distribution curves as a function of angle of incidence of light in single ommatidia of arthropod compound eyes. — As preliminary experiment, the visual fields of ommatidia in Limulus, Apis and Cataglyphis have been ascertained without a light measuring instrument. A point source was moved through the visual field and the angular position of the light source on both sides of the visual field at which the rhabdome in the cut-off eye viewed from proximal turned dark was determined. In the dorsal part of the Limulus eye, the cranio-caudal width of the visual field is 42.6±0.3°. The width of the visual field of central ommatidia in Apis is 6.68±0.14° in the dorsoventral plane and 7.42±0.24° in the cranio-caudal direction, in Cataglyphis 15.5±0.5° and 12.5±0.4° respectively.— Similar Gaussian curves for light and dark adapted ommatidia resulted from the continuous recordings of intensity distribution curves in Apis. The rotatory symmetric curve of the worker bee has a half-width of Δρ=2.57°. The standardized curve of amplitude one may be approximated by the function y=exp (-0.41 [degree−2]ϕ 2). In Cataglyphis, the half-width of the intensity distribution curve is Δρ=8.8° in the dorso-ventral plane and Δρ=6.8° in the cranio-caudal plane. Near the axis, the functions y=exp(-0.04 [degree−2]ϕ2) and y=exp(-0.06 [degree−2]ϕ 2) approximate the standardized curves. — Knowledge of intensity distributions in connection with interommatidial angles Δρ allows estimation of contrast transfer and resolving power of the array of the dioptric systems. Correlations with behavioural findings are attempted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00290516
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    Paper (German National Licenses)
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