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  • 1985-1989  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Anomalous small-angle scattering in metallurgy: a feasibility experiment with an Al–Zn alloy (1986)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 19 (1986), S. 19-24 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The variation of the atomic scattering factor near the X-ray absorption edge of an element can be an important tool for determining the distribution of that element in any sample. For defining experimentally the possibilities of anomalous small-angle X-ray scattering (ASAXS) in metallurgy, three compositions of a phase-separated aluminium-zinc alloy have been studied at different energies below the Zn-absorption edge, using a synchrotron radiation source. In order to test the reliability of these measurements and of the data treatment, the variation of f′, the real part of the scattering factor, has been measured with a precision comparable to that of more direct measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889886090064
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Ultrasound demonstration of pericardial empyema in an infant with pyrexia of undetermined origin (1988)
    Springer
    Pediatric radiology 18 (1988), S. 349-350 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract An infant with pyrexia of unknown origin presented to the Paediatric Unit. The initial infection screen was unhelpful and he was, therefore, referred for abdominal ultrasound to look for occult sepsis. During epigastric scanning, a large loculated fluid collection was demonstrated in the pericardium. A pericardial empyema should not be forgotten as a possible source of infection in the infant with undetermined pyrexia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02389012
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    “Pseudocatheter” due to inadvertent ventricular catheter placement (1988)
    Springer
    Pediatric radiology 18 (1988), S. 353-354 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Ultrasound is frequently used in the routine follow-up of patients who have been shunted for obstructive hydrocephalus. We report a case with “pseudocatheter” appearance due to the initial incorrect placement of the ventricular catheter. To our knowledge, such an appearance has not been previously described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02389014
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Six degrees of freedom motion measurement with application to violin-bowing analysis (1987)
    Springer
    Experimental mechanics 27 (1987), S. 423-428 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A spatial six degrees of freedom mechanism has been developed in order to measure instantaneous relative spatial position and motion of two rigid bodies. Angular displacements of all joints of the mechanism were measured by a set of precise potentiometers and digitized as a function of time. Conversion to linear Cartesian and angular coordinates involved a computer algorithm based on the direct kinematics approach. Calibration was carried out for the assembled mechanism in a given workspace. Joint angles were calculated for a number of defined positions of the mechanism using the inverse-kinematics computer algorithm. Calculated angles were then compared with the corresponding sensor readings and the characteristic of each joint sensor was determined individually by the least-squares-fit method. Differentiation of the obtained position trajectories was performed to find linear and angular velocities as well as accelerations. Digital filtering was applied to eliminate the noise caused by the data-acquisition system as well as by the digital differentiation procedure. The device has been applied to measure the relative position of the violin bow with respect to the violin itself. This enabled bowing-mechanics and bowing-skills analysis. An example of data obtained is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02330317
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    Paper (German National Licenses)
    Fulltext
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