Pattern generation by dissipative parametric instability

Nonlinear instabilities are responsible for spontaneous pattern formation in a vast number of natural and engineered systems, ranging from biology to galaxy buildup. We propose a new instability mechanism leading to pattern formation in spatially extended nonlinear systems, which is based on a periodic antiphase modulation of spectrally dependent losses arranged in a zigzag way: an effective filtering is imposed at symmetrically located wave numbers k and -k in alternating order. The properties of the dissipative parametric instability differ from the features of both key classical concepts of modulation instabilities, i.e., the Benjamin-Feir instability and the Faraday instabiltyity. We demonstrate how the dissipative parametric instability can lead to the formation of stable patterns in one- and two-dimensional systems. The proposed instability mechanism is generic and can naturally occur or can be implemented in various physical systems

The Quadrupole Magnets for the LHC Injection Transfer Lines

Two injection transfer lines, each about 2.8 km long, are being built to transfer protons at 450 GeV from the Super Proton Synchrotron (SPS) to the Large Hadron Collider (LHC). A total of 180 quadrupole magnets are required; they are produced in the framework of the contribution of the Russian Federation to the construction of the LHC. The classical quadrupoles, built from laminated steel cores and copper coils, have a core length of 1.4 m, an inscribed diameter of 32 mm and a strength of 53.5 T/m at a current of 530 A. The total weight of one magnet is 1.1 ton. For obtaining the required field quality at the small inscribed diameter, great care in the stamping of the laminations and the assembly of quadrants is necessary. Special instruments have been developed to measure, with a precision of some mm, the variations of the pole gaps over the full length of the magnet and correlate them to the obtained field distribution. The design has been developed in a collaboration between BINP and CERN. Fabrication and the magnetic measurements are done at BINP and should be finished at the end of the year 2000

Synthesis, Characterization and Luminescent Properties of Mg- and Cr-Doped Alumina Ceramics

The reported study was funded by RFBR according to the research project No 18-33-00085

Synthesis, characterization and luminescent properties of Mg- A nd Cr-doped alumina ceramics

Alumina ceramic doped with Mg and Cr is produced at high-temperature sintering under vacuum at varying annealing temperature and dopant concentration. A differential thermal analysis, X-ray fluorescence, and X-ray diffraction methods are used for sample characterization. The effect of the characteristics described above on the formation of different defects and luminescence centers in the samples was studied with a thermoluminescence method. An increase in the dopant concentration leads to an increase in the pulsed cathodoluminescence intensity of the dopant center in Mg-doped alumina ceramics and a decrease in Cr-doped alumina ceramics. The thermoluminescence intensity for Al2O3:Mg ceramics increases with magnesium concentration growth. The highest thermoluminescence intensity under a pulsed electron beam was obtained for ceramics with chromium (0.1 wt. %) annealed under vacuum at the temperature of 1500 °C for 2 hours. On thermoluminescence curves, one isolated peak at a temperature in the range of 645-665K was registered. © 2020 Author(s).The reported study was funded by RFBR according to the research project No 18-33-00085

LUMINECSENCE OF ALUMINA CERAMIC WITH MAGNESIUM AND MANGANESE

Alumina samples doped with magnesium and manganese impurities were synthesized at various concentrations. The spectra of photoluminescence and pulsed cathodoluminescence were measured.Работа выполнена при поддержке стипендии Президента Российской Федерации молодым ученым и аспирантам, осуществляющих перспективные научные исследования и разработки по приоритетным направлениям модернизации российской экономики (№ СП-3858.2018.2)

Genternye clinical presentations and autonomic regulation urinary tract in patients with urological diseases

Investigated the possible influence of the autonomic nervous system on the clinical features of bladder dysfunction in patients urological clinic. Found that the lower urinary tract dysfunction in men in this group have their own characteristics and are implemented in a regulatory level prevalence sympathoadrenal autonomic nervous system. In women, lower urinary tract dysfunction is characterized by a high activity of parasympathetic ANS.Исследовано возможное влияние вегетативной нервной системы на клинические проявления дисфункции мочевого пузыря у пациентов урологического стационара. Установлено, что дисфункция нижних мочевых путей у мужчин этой группы имеют свои особенности и реализуются в условиях регуляторного преобладания симпатоадреналового звена вегетативной нервной системы. У женщин дисфункция нижних мочевых путей характеризуется более высокой активностью парасимпатического отдела ВИС

Neurogenic disorders of urination of chronic pyelonephritis

Neurosurgical patients before surgical treatment of the underlying disease, a study state of the autonomic nervous system tests Cardiointervalographic and spectral analysis of heart rate as a possible factor influencing the formation of NNM complications of chronic pyelonephritis. Found that the clinical manifestations of NNM bladder in men with neurosurgical pathology and complications of chronic pyelonephritis are implemented in the voltage level of sympathoadrenal autonomic nervous system. In women suffering from similar disorders NNM with chronic pyelonephritis, proceeds in a higher activity of the parasympathetic division of the SPA. The possible causes and ways of correction.У нейрохирургических больных перед оперативным лечением основного заболевания, проведено исследование состояние вегетативной нервной системы по тестам кардиоинтервалографии и спектрального анализа ритма сердца, как возможного фактора влияющего на формирование НИМ осложненного хроническим пиелонефритом. Установлено, что клинические проявления НИМ пузыря у мужчин с нейрохирургической патологией и осложненное хроническими пиелонефритом реализуются в условиях напряжения симпатоадреналового звена вегетативной нервной системы. У женщин страдающих аналогичной патологией НИМ на фоне хронического пиелонефрита, протекает в условиях более высокой активности парасимпатического отдела ВИС. Обсуждаются возможные причины и пути коррекции