Nonlinear axisymmetric liquid currents in spherical annuli

A numerical analysis of non-linear axisymmetric viscous flows in spherical annuli of different gap sizes is presented. Only inner sphere was supposed to rotate at a constant angular velocity. The streamlines, lines of constant angular velocity, kinetic energy spectra, and spectra of velocity components are obtained. A total kinetic energy and torque needed to rotate the inner sphere are calculated as functions of Re for different gap sizes. In small-gap annulus nonuniqueness of steady solutions of Navier-Stokes equations is established and regions of different flow regime existences are found. Numerical solutions in a wide-gap annulus and experimental results are used in conclusions about flow stability in the considered range of Re. The comparison of experimental and numerical results shows close qualitative and quantitative agreement

Wavelets: mathematics and applications

The notion of wavelets is defined. It is briefly described {\it what} are wavelets, {\it how} to use them, {\it when} we do need them, {\it why} they are preferred and {\it where} they have been applied. Then one proceeds to the multiresolution analysis and fast wavelet transform as a standard procedure for dealing with discrete wavelets. It is shown which specific features of signals (functions) can be revealed by this analysis, but can not be found by other methods (e.g., by the Fourier expansion). Finally, some examples of practical application are given (in particular, to analysis of multiparticle production}. Rigorous proofs of mathematical statements are omitted, and the reader is referred to the corresponding literature.Comment: 16 pages, 5 figures, Latex, Phys. Atom. Nuc

Two-dimensional discrete wavelet analysis of multiparticle event topology in heavy ion collisions

The event-by-event analysis of multiparticle production in high energy hadron and nuclei collisions can be performed using the discrete wavelet transformation. The ring-like and jet-like structures in two-dimensional angular histograms are well extracted by wavelet analysis. For the first time the method is applied to the jet-like events with background simulated by event generators, which are developed to describe nucleus-nucleus collisions at LHC energies. The jet positions are located quite well by the discrete wavelet transformation of angular particle distribution even in presence of strong background.Comment: 6 pages, 6 figure

Echohysterosalpingography: pros and cons. A systematic review

Background. Infertility is becoming ever more pressing a problem by year in Russia and worldwide. Tubal-peritoneal infertility is most frequent, with the prevalence of 42.5-80.5% in various estimates. Echohysterosalpingography is considered the today’s “gold standard” in tubal-peritoneal infertility diagnosis in women. This method is known to possess a series of limitations and adverse consequences due to painful sensations during and after check-ups that psychologically afflict women.Objectives. An overview of current methods for inspecting fallopian tubes in reproductively impaired patients to inform promising diagnostic research.Methods. Publications were mined and analysed in the PubMed, eLibrary, Web of Science, Cochrane Library and Cyberleninka electronic databases. The query terms were: echohysterosalpingography [эхогистеросальпингография], echohysterography [эхогистерография], infertility [бесплодие], pregnancy planning [планирование беременности], fallopian patency [проходимость маточных труб], ultrasonic diagnosis [ультразвуковая диагностика], submucous myomatous node [субмукозный миоматозный узел], incompetent uterine scar [несостоятельный рубец на матке], niche [ниша]. The topic selected was female infertility, particularly, the use of echohysterosalpingography in fallopian diagnosis in reproductively impaired women.Results. The review covers 52 sources of the total 118 analysed. Current published evidence and its review identify a notable success of imaging techniques in the fallopian tube diagnosis in women with reproductive problems. The continually developing echohysterosalpingography technique is considered more promising for routine use. Techniques gain more value in analyses of implantation failures. The main challenges in current radiodiagnosis and monitoring of fallopian lesions at a background therapy are the inspection standardisation, disease classification, imaging diagnostic accuracy and prognostic value evaluation in patients with reproductive loss and infertility.Conclusion. The prospective routes of research comprise the definition of optimal check-up terms, echohysterography and echohysterosalpingography diagnostic criteria descriptiveness, improving prognosis in the carrying of pregnancy and treatment efficacy control. A timely and accurate diagnosis of uterus and fallopian tubes is of paramount importance to sustain the women’s reproductive health

CURRENT PRINCIPLES FOR CRANIOPHARYNGIOMA TREATMENT

The paper describes the classification and treatment options of craniopharyngiomas, benign epithelial tumors arising from the cell remains of the Rathke’s pouch. It presents a few types of surgical accesses during surgical treatment for this disease and gives examples of how to place an Ommaya reservoir

The NEWS score for the prediction of adverse outcomes in emergency department patients

The purpose of the study was to estimate the NEWS score as an outcome predictor in emergency department patients of Yekaterinburg City Clinical Hospital №40. The study was single-centered, prospective. Composite outcome of mortality and ICU length of stay > 1 day was the primary outcome of the study. The NEWS score AUROC was 0,856 (95% CI 0,797-0,915), it defines the NEWS score as a very good predictorИсследование ставило цель оценить шкалу NEWS в прогнозировании исходов у пациентов приемного отделения на базе ГКБ №40 г. Екатеринбурга. Исследование одноцентровое, проспективное. В качестве конечных точек исследования использовались летальный исход и/или пребывание в ОРИТ >1 суток. Площадь под ROC-кривой шкалы NEWS составила 0,856 (95% ДИ 0,797-0,915), что определяет шкалу NEWS как очень хороший предикто

Nonlinear thermo-optical properties of two-layered spherical system of gold nanoparticle core and water vapor shell during initial stage of shell expansion

Nonlinear thermo-optical properties of two-layered spherical system of gold nanoparticle core and water vapor shell, created under laser heating of nanoparticle in water, were theoretically investigated. Vapor shell expansion leads to decreasing up to one to two orders of magnitude in comparison with initial values of scattering and extinction of the radiation with wavelengths 532 and 633 nm by system while shell radius is increased up to value of about two radii of nanoparticle. Subsequent increasing of shell radius more than two radii of nanoparticle leads to rise of scattering and extinction properties of system over initial values. The significant decrease of radiation scattering and extinction by system of nanoparticle-vapor shell can be used for experimental detection of the energy threshold of vapor shell formation and investigation of the first stages of its expansion