Application of the high-frequency loading methods for accelerated determination of the effect of technological, design, and service factors on resistance to fatigue failure. Report 1

ABSTRACTAn investigation of the frequency behavior of polycrystalline ferrites is presented. It is shown that the low frequency dispersion (f < 10 MHz) of permeability is associated with the bulging of pinned domain walls, and has a mixed resonance-relaxation character, closer to the latter. It is also shown that there is a linear relationship between the magnetocrystalline anisotropy constant, K1, and the relaxation frequency. The slope of this correlation depends on the grain size. Such a relationship could allow the determination of this basic parameter from polycrystalline samples.

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Determination of high frequency package currents from near-field scan data

2005 International Symposium on Electromagnetic Compatibility, 2005. EMC 2005. ◽

10.1109/isemc.2005.1513600 ◽

2005 ◽

Cited By ~ 2

Author(s):

Xiaopeng Dong ◽

Shaowei Deng ◽

D.G. Beetner ◽

T.H. Hubing ◽

T.P. Van Doren

Keyword(s):

High Frequency ◽

Near Field ◽

Scan Data

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Use of methods of high-frequency loading for accelerated determination of the effective stress concentration factors

Strength of Materials ◽

10.1007/bf01528676 ◽

1988 ◽

Vol 20 (8) ◽

pp. 1040-1044

Author(s):

L. E. Matokhnyuk ◽

A. V. Voinalovich

Keyword(s):

Stress Concentration ◽

Effective Stress ◽

High Frequency ◽

Concentration Factors ◽

Stress Concentration Factors

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High Frequency Ultrasonic Measurements

Measurement and Control ◽

10.1177/002029408802100501 ◽

1988 ◽

Vol 21 (5) ◽

pp. 133-136

Author(s):

N Zarsav

Keyword(s):

High Frequency ◽

Polymer Coating ◽

Steel Sheet ◽

Lamb Waves ◽

Thin Plates ◽

Design Features ◽

Degree Of Cure ◽

Double Probe ◽

Ultrasonic Measurements

The use of high frequency ultrasonic Lamb waves to measure the thickness of thin plates and foils, is discussed and the feasibility of their application to the determination of the degree of cure of polymer coating on coated tin plated steel sheet (as used by the food can industry) is evaluated. The paper also discusses briefly the design features of the purpose built precision double probe ultrasonic goniometer used to carry out these measurements.

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Very Early and Simple Determination of Chorionic and Amniotic Type in Twin Gestations by High-Frequency Transvaginal Ultrasonography

Acta geneticae medicae et gemellologiae twin research ◽

10.1017/s0001566000000581 ◽

1997 ◽

Vol 46 (3) ◽

pp. 167-173 ◽

Cited By ~ 5

Author(s):

W. Malinowski

Keyword(s):

Study Design ◽

High Frequency ◽

Twin Pregnancy ◽

Rapid Determination ◽

Early Stage ◽

Transvaginal Ultrasonography ◽

Pathologic Evaluation ◽

Twin Pregnancies

AbstractObjective. The aim was to determine the chorionic and amniotic types in multifetal pregnancies with transvaginal ultrasonography at very early stage of gestation.Study design. Twenty-one spontaneous multifetal pregnancies were scanned transvaginally before 8 weeks' gestation (four of them from 4th week). The chorionic and amniotic type was determined ultrasonographically. All twin gestations had postpartum pathologic evaluation of the placenta and histologic determination of the chorionic and amniotic type.Results. Ultrasonographic evaluation of the 21 pregnancies demonstrated 20 twin and 1 triplet gestation. Four of the twin pregnancies were monochorionic-diamniotic. Triplet was monochorionic-triamniotic (spontaneously aborted in 8th week of gestation). In all 20 twin pregnancies, transvaginal ultrasonography correctly predicted the chorionic and amniotic type before 8 weeks of gestation.Conclusion. Transvaginal ultrasonography allows a reliable, simple and rapid determination; the dichorionic twin pregnancy in 4 weeks, monochorionic in 5 weeks, and differentiation of mono-or diamniotic in 7 weeks of gestation.

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