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  • 1995-1999  (2)
  • 1985-1989  (2)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 4154-4154 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have extended previous1 calculations of ferromagnetic resonance (FMR) in magnetic alternating layered structures by including the effects of exchange coupling between layers. Whereas in previous calculations the magnetic layers were separated by a nonmagnetic layer, in this calculation all the layers are magnetic. In particular we consider the problem in which successive iron layers in the layered structure are separated by an iron alloy layer. The magnetic properties of the alloy are purposely chosen so that the ferromagnetic resonance field in the absence of any external fields due to exchange coupling between layers is close to (∼600 Oe) the iron FMR line. We find that the separation in FMR fields corresponding to the two types of layers is strongly affected by exchange coupling A12. For A12=−0.1 ergs/cm2 the separation between the lines is 384 Oe in comparison to 604 Oe for A12=0. However, for A12=0.1 ergs/cm2 both lines are shifted dramatically from the Kittel resonance conditions. This implies that FMR should be a useful technique in measuring exchange effects in multilayers structures. The calculation will be discussed in terms of recent experimental results.2
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 333 (1988), S. 21-22 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR-Recently, Sastry et al.1 suggested that the low-field electron spin resonance (ESR) signal of YBa2Cu,O7_r superconductors observed with an X-band spectrometer could be attributed to a large zero-field splitting arising from dimerization of electrons on copper pairs in adjacent octahedra. But ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The international journal of advanced manufacturing technology 13 (1997), S. 618-629 
    ISSN: 1433-3015
    Keywords: Cost estimation ; Feature based ; Framework ; Integrated ; Manufacturing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The major objective of concurrent engineering is to consider the related downstream manufacturing during the design stage. Estimating manufacturing cost during the early design stage is one area that has been given little attention by researchers. However, if the product manufacturing cost can be estimated during the design stage, designers can modify a design to achieve proper performance as well as a reasonable cost at an early stage of the product development process. Basically, manufacturing cost is determined by shape complexity, product precision and tooling process. That is, if these data can be obtained and considered during the design stage, estimating manufacturing cost during the early product development stage will become a feasible task. In this research, a framework for estimating the manufacturing cost in terms of a feature-based approach is proposed. This system tends to estimate the manufacturing cost of a design according to the shapes and precision of its features. The objective of this research is to provide a tool to assist a designer, who has little knowledge about the manufacturing process, to estimate the fabrication cost of a design during its conceptual stage, in order to reduce unnecessary costs in the downstream process.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 15 (1999), S. 475-478 
    ISSN: 1437-9813
    Keywords: Key words Hyperhidrosis ; Endoscopic sympathectomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Primary hyperhidrosis (PH) often starts in childhood and adolescence and can be a troublesome condition. In Taiwan, there is a high incidence in childhood (1.6%–2.0%) and adolescence (2.2%–2.6%). There are few reports regarding transthoracic endoscopic sympathectomy (TES) for PH in children and adolescents. From July 1994 to April 1998, a total of 438 patients underwent TES. There were 174 males and 264 females with a mean age of 14.2 years (range 5–17 years). All patients were placed in a semi-sitting position under single-lumen intubation anesthesia. We performed ablation of the T2 ganglion and any Kuntz fibers in 350 patients with palmar hyperhidrosis and a similar procedure on the T2 and T3 ganglia in 88 patients with palmar and axillary hyperhidrosis using either a 6- or 8-mm thoracoscope via one 0.8-cm incision just below each axilla. In the 438 patients, 875 sympathectomies were performed. There was 1 technical failure due to severe pleural adhesions. TES was usually accomplished within 15 min (range 7–20 min). All except 5 patients were discharged within 4 h after operation. The surgical complication rate was minimal: 1 pneumothorax (0.23%) and 2 segmental lung collapses (0.46%). There was no surgical mortality. The mean postoperative follow-up period was 25.2 months (range 4–45 months). The result was highly satisfactory in 408 patients (93.2%), although 377 (86%) developed compensatory sweating of the trunk and lower limbs, the distribution affecting the back (86%), abdomen (48%), lower limbs (78%), and soles (1.4%). The recurrence rate of palmar hyperhidrosis was 0.6% in the 1st, 1.1% in the 2nd, and 1.7% in the 3rd year. TES is thus a safe and effective method for treating palmar and axillary hyperhidrosis in children and adolescents.
    Type of Medium: Electronic Resource
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