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  • Electronic Resource  (3)
  • 1985-1989  (2)
  • 1980-1984  (1)
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  • Electronic Resource  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Effect of order-disorder transition on magnetic properties of high silicon-iron single crystals (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 460-464 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using high silicon-iron single crystals containing around 6.5 wt. % silicon, the quenching temperature dependence of the saturation magnetization, the magnetocrystalline anisotropy constant, and the magnetostriction constants were measured at room temperature. The saturation magnetization and the anisotropy constant of the crystals with 4.9–6.0 wt. % silicon quenched into oil from 1100 °C showed decreases of up to 12 and 80%, respectively, compared to crystals cooled slowly from 1100 °C, while the saturation magnetostriction constants λ100 and λ111 increased for quenched crystals. The decreases in the saturation magnetizations and the anisotropy constants and the increases in the saturation magnetostriction constants for the quenched crystals were correlated with decreases in an order parameter calculated from x-ray measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.334773
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ribbon-form Sendust alloy made by rapid quenching methods (1980)
    Springer
    Applied physics 21 (1980), S. 335-338 
    Details
    ISSN: 1432-0630
    Keywords: 75.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Ribbon-form Sendust was prepared by a roll quenching method. The size of the ribbon was 20∼110 μm thick, 2∼8 mm wide and 5∼10 m long. The normal direction of the ribbon plane was parallel to the [100] as well as the [110] axes, and no preferential directions exist within the ribbon plane. Vickers hardnessH v of the as-prepared ribbon was 563±7, decreased with increasing the annealing time and became almost constant. The minimum bending diameter of the as-prepared ribbon was 8 mm and increased gradually with increase of the annealing time. Initial permeability of the 84.80 Fe·9.50 Si·5.70 Al ribbon was about 34,000 in the frequency range from 1 to 3kHz and decreased to be 10,000 at 85 kHz. The permeability of the molded core in a resin was about 21,000 in the frequency range from 1 to 3 kHz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00895924
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Dynamics of the spinal cord: an analysis of functional myelography by CT scan (1988)
    Springer
    Neuroradiology 30 (1988), S. 538-544 
    Details
    ISSN: 1432-1920
    Keywords: CT myelography ; Laminectomy ; Laminoplastic surgery ; Myelopathy ; Postoperative spinal deformity ; Spinal cord dynamics ; Suspension laminotomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The antero-posterior movement of the spinal cord with flexion and extension of the neck was analyzed in order to clarify the mechanism of spinal cord compression in cases with postoperative spinal deformity, and to contribute to the improvement of the surgical methods of conventional laminectomy. The control subjects were 47 cases without cervico-thoracic neurological symptoms, who underwent CT myelography in flexion and extension of the neck; the cervical spinal cord was examined in 27 of these cases and the thoracic cord in the other 20. CT myelography was also carried out in 16 patients with cervical myelopathy and in 5 patients after posterior decompression surgery (suspension laminotomy). CT sections in flexion and extension of the neck were analyzed for 1) change of configuration of the dura mater and the spinal cord, and 2) antero-posterior shift of the spinal cord in the subarachnoid space. In the control subjects, the configuration of the dura mater was slightly flattened at C5/6, C6 and C6/7 in extension of the neck. The cervical spinal cord shifted anteriorly in flexion and posteriorly in extension of the neck, and was flattened at the midcervical level in flexion in the control subjects. There was a statistically significant correlation between the location of the spinal cord and the adjacent intervertebral angles at the levels of C4, C5 and C6. These results were compared with the results from the 16 patients with cervical myelopathy and 5 patients after suspension laminotomy. The thoracic spinal cord shifted anteriorly in neck flexion and posteriorly in extension, especially at upper thoracic level. In order to avoid spinal cord compression due to anterior shift of the spinal cord caused by postoperative kyphosis, it is necessary to employ the surgical method which can prevent postoperative kyphotic deformity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00339697
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    Paper (German National Licenses)
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