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A case of
anatomical variation of the hyoid bone in a girl is presented. Over-extended
bending of the elongated and curved right side of the hyoid bone, may project
to the lumen of the supraglottic area as the patient presented. She had a
foreign body sensation in her throat, and on fiber optic laryngeal examination, a bulge’s appearance as a “third arythenoid”
was seen. We present the clinical finding and the picture of a “third arythenoid” with literature review.
The qualitative explanation of the earlier published experimental
data was obtained within new energetic model of oriented carbyne. The
conductivity spectrum and the superinjection effect feature Landau quantization
in a giant pseudomagnetic field. The relativistic dispersion of carriers and
non-dissipative character of their motion cause the effect of superinjection
where carriers go upwards on an energetic ladder. Raman-spectra and other data
point out to the fact that the plane of carriers’ motion is close to the
carbyne-insulator interface. Quantum effects and on-surface conductivity allow
considering oriented carbyne as an analogue of topological insulator.
In this paper, the problem of identification of the characteristics of the rotor unbalance on two supports is investigated as the inverse problem of measurement. The vibration of rotor supports in two mutually perpendicular directions used as the initial information. The inverse problem is considered, taking into account the error of the mathematical description of rotor-bearings system. To obtain estimates of real unbalance characteristics, the hypothesis as to the exact solutions is applied. The method of Tikhonov regularization is used to obtain stable results. Test calculations are given to illustrate the proposed approach.
Automated simulating of power electronics systems is currently performed by means of nodal analysis method combined with implicit numerical integration schemes. Such method allows to find transient solutions, even when the integrated system is stiff, however, it leads to some difficulties when simulating big systems and sometimes to the deterioration of computations quality, that is reflected in decrease in accuracy, oscillations of solutions, which are not present in the initial model. This paper analyzes the shortcomings of this approach, and proposes to apply explicit numerical schemes with stability control on the integration step and with reduction of some of state variables. A brief description of the method of finding transient solutions and an example of the analysis are also given in the present paper.