Влияние на организм человека гипоксии при высокогорных восхождениях

External respiratory function was studied in those engaged in mountaineering. A negative correlation was found between the intensity of exercise and the changes in vital capacity under mountainous conditions. Changes occurring in the levels of glucose and cholesterol were considered in tourists.Проведены исследования функции внешнего дыхания у участников горных туристических походов. Отмечена выраженная отрицательная корреляционная связь мужду интенсивностью физических нагрузок и изменениями жизненой емкости легких в условиях высокогорья. Рассмотрены изменения уровня глюкозы, холестерина у туристов

A New Nanoporous Material Based on Amorphous Silicon Dioxide

Processes for making nanoporous SiO2 layers on Si via the irradiation of thermally oxidized silicon wafers with fast ions followed by chemical treatment in a solution or vapor of hydrofluoric acid are presented. It is shown that the density, shape, diameter, and length to diameter ratio of channels etched in silicon dioxide can be controlled by varying the regimes of fast ion irradiation or chemical treatment of SiO2/Si structures. Track parameters calculated using the thermal spike model are compared with the chemical etching data

Маркетинг навколишнього середовища

The photophysical properties of silicon semiconductor nanocrystals (SiNCs) are extremely sensitive to the presence of surface chemical defects, many of which are easily produced by oxidation under ambient conditions. The diversity of chemical structures of such defects and the lack of tools capable of probing individual defects continue to impede understanding of the roles of these defects in SiNC photophysics. We use scanning tunneling spectroscopy to study the impact of surface defects on the electronic structures of hydrogen-passivated SiNCs supported on the Au(111) surface. Spatial maps of the local electronic density of states (LDOS) produced by our measurements allowed us to identify locally enhanced defect-induced states as well as quantum-confined states delocalized throughout the SiNC volume. We use theoretical calculations to show that the LDOS spectra associated with the observed defects are attributable to Si-O-Si bridged oxygen or Si-OH surface defects

Results of a Joint Epizootiological Survey of Transboundary Natural Plague Foci of the Russian Federation and Potentially Focal Territories of the Republic of Kazakhstan in 2019–2022

Consolidation of the efforts in implementation of epidemiological surveillance and control over plague and other dangerous natural-focal infections is an essential aspect in ensuring epidemiological well-being as regards particularly dangerous infectious diseases in the territory of natural plague foci and potentially focal territories located within the borders of the Russian Federation and the Republic of Kazakhstan. The aim of the work was to carry out a joint epizootiological survey of the transboundary territories of the Volga-Ural sandy natural plague focus and the territory of the East Kazakhstan region of the Republic of Kazakhstan (RK) potentially focal for plague over the period of 2019–2022. Materials and methods. Samples of field materials, collected during the epizootiological survey of the territory of Kazakhstan, were studied using bacteriological, molecular-genetic, and immune-serological methods. Results and discussion. We have obtained the current evidence on the spatial-biocenotic structure, the circulation of pathogens of dangerous natural-focal infectious diseases in the transboundary territories of Eastern and Western Kazakhstan. It has been established that the conditions that contribute to the possibility of human infection with plague and other dangerous infectious diseases in case of the aggravation of epizootic situation in the foci or importation of the pathogens into the territory are in place

Directions for the Development of Domestic Self-propelled Artillery Systems Based on the Analysis of Samples of Artillery Weapons From the Leading Countries of the World

The armed aggression of the Russian Federation in the east of Ukraine has made significant adjustments to the domestic development of weapons and military equipment both in our country and abroad. The development of artillery weapons as the main type of effective engagement of the enemy according to the experience of the anti-terrorist operation (operation of the Joint Forces) is a priority, since a considerable percentage of the tasks of engaging the enemy with fire falls on artillery. This article discusses the formation of directions for the development of domestic self-propelled artillery systems based on the analysis of samples of artillery weapons from the militarily leading countries of the world. It should be noted that the widespread introduction of modern technologies and scientific and technical solutions to increase the effectiveness of the use of a model of weapons and military equipment is one of the main directions of the development of artillery weapons for a partial solution of problems associated with the development of forms of warfare

RESEARCH OF BRAKING MODES OF ASYNCHRONOUS VIBRATION MOTOR DEBELYANOVO

The possibility of braking the asynchronous unbalanced vibration motor through the capacitor of the opposition. The results of mathematical modeling modes, coasting and braking by condensing opposition asynchronous vibration motor

On the Distribution of the Stationary Point of Significance Level for Empirical Distribution Function

We consider empirical distribution functions of nonstationary time-series, depending on set length. The local self- consistent significance level is introduced. The class of time- series, for which the distribution function of significance level is stationary, is considered. For example, the signal-to-interference ratio for random walking subscribers in D2D model of wireless connection belongs to this class of random processes. We introduce also the so-called Chernoff equivalence of the self-consistent significance level and derive the formula of averaging levels for various sets.acceptedVersionPeer reviewe