Experimental investigations of the use of cartilage in tympanic membrane reconstruction

One of the most important diagnostic problems multilayer dielectric materials and coatings is the development of methods for quantitative interpretation of the checkout results their electrophysical and geometric parameters. The results of a study of the potential informativeness of the multi-frequency radio wave method of surface electromagnetic waves during reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings are presented. The simulation model is presented that makes it possible to evaluate of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings. The model takes into account the values of the electrophysical and geometric parameters of the coating, the noise level in the measurement data and the measurement bandwidth. The results of simulation and experimental investigations of reconstruction of the structure of relative permittivitties and thicknesses of single-layer and double-layer dielectric coatings with different thicknesses, with different values of the standard deviation (RMS) of the noise level in the measured attenuation coefficients of the surface slow electromagnetic wave are presented. Coatings based on the following materials were investigated: polymethyl methacrylate, F-4D PTFE, RO3010. The accuracy of reconstruction of the electrophysical parameters of the layers decreases with an increase in the number of evaluated parameters and an increase in the noise level. The accuracy of the estimates of the electrophysical parameters of the layers also decreases with a decrease in their relative permittivity and thickness. The results of experimental studies confirm the adequacy of the developed simulation model. The presented model allows for a specific measuring complex that implements the multi-frequency radio wave method of surface electromagnetic waves, to quantify the potential possibilities for the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric materials and coatings. Experimental investigations and simulation results of a multilayer dielectric coating demonstrated the theoretical capabilities gained relative error permittivity and thickness of the individual layers with relative error not greater than 10 %, with a measurement bandwidth of 1 GHz and RMS of noise level 0,003–0,004.

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A Case of Totally Lateralized Tympanic Membrane

Korean Journal of Otorhinolaryngology - Head and Neck Surgery ◽

10.3342/kjorl-hns.2013.56.3.172 ◽

2013 ◽

Vol 56 (3) ◽

pp. 172

Author(s):

Byeong Jin Kim ◽

Jae-Ryong Kim ◽

Woo Kil Park ◽

Kyung Wook Heo

Keyword(s):

Tympanic Membrane

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New experimental investigations of the 1/f noise mechanism

Uspekhi Fizicheskih Nauk ◽

10.3367/ufnr.0123.197709e.0131 ◽

1977 ◽

Vol 123 (9) ◽

pp. 131 ◽

Cited By ~ 5

Author(s):

Sh.M. Kogan

Keyword(s):

Experimental Investigations

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Rossby solitons (Experimental investigations and laboratory model of natural vortices of the Jovian Great Red Spot type)

Uspekhi Fizicheskih Nauk ◽

10.3367/ufnr.0150.198609a.0003 ◽

1986 ◽

Vol 150 (9) ◽

pp. 3 ◽

Cited By ~ 22

Author(s):

M.V. Nezlin

Keyword(s):

Laboratory Model ◽

Experimental Investigations ◽

Spot Type

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CLINICAL INVESTIGATIONS OF A LONG-ACTING OESTRIOL (POLYOESTRIOL PHOSPHATE)

Acta Endocrinologica ◽

10.1530/acta.0.0380073 ◽

1961 ◽

Vol 38 (1) ◽

pp. 73-87 ◽

Cited By ~ 8

Author(s):

Christian Lauritzen ◽

Semih Velibese

Keyword(s):

Side Effects ◽

Phosphoric Acid ◽

Quantitative Data ◽

Water Soluble ◽

Cholesterol Concentration ◽

Experimental Investigations ◽

Clinical Investigations ◽

Prolonged Duration ◽

High Doses ◽

Long Acting

ABSTRACT A description is given of experimental investigations and preliminary clinical experience with the long-acting oestriol compound polyoestriol phosphate – a water-soluble polymere of oestriol and phosphoric acid. The compound seems to exert all the physiologically important effects of oestriol. Even with high doses the hormone causes no proliferation of the endometrium and no withdrawal bleeding. It has no untoward effect on metabolism. It decreases slightly the cholesterol concentration (to the extent of ⅓–⅕ of the effect produced by long-acting oestradiol esters). The compound has a wide therapeutic range. No side-effects have been observed. Doses of 10 mg or more have a prolonged duration. Additional prolongation of the effect is largely dependent on dosage. To ensure an effect lasting for 4 weeks 40 mg polyoestriol phosphate (corresponding with 30 mg oestriol) is required – an amount which roughly corresponds with physiological quantitative data. The compound, which involves an interesting new principle of prolongation, was most effectively used in the treatment of menopausal symptoms and genital organic disorders. For these indications it can be recommended without reservation.

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