Russian Ministry of the Emergency Situations

About: Russian Ministry of the Emergency Situations is a government organization based out in Moscow, Russia. It is known for research contribution in the topics: Combustion & Liquid crystal. The organization has 218 authors who have published 172 publications receiving 453 citations. The organization is also known as: Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters.

Thermodynamic Simulation of Heating of Radioactive Graphite in Argon Atmosphere

Abstract: The thermal behavior of the radioactive graphite–argon system at a pressure of 105 Pa was studied by thermodynamic simulation. The distribution of the elements of the system by phases and the thermophysical properties of the system are determined.

Influence of the oxygen content in the oxidizing medium on the combustion of fuel–oxidizing medium–hydrofluorocarbon near-stoichiometric mixtures

Abstract: The effect of the oxygen content in the oxidizing medium (O2–N2 mixture) on the characteristics of the combustion of gaseous fuel (hydrogen, methane)–oxidizing medium–hydrofluorocarbon (trifluoromethane CHF3, pentafluoroethane C2HF5, or perfluorobutane C4F10) is experimentally studied. The oxygen concentrations in the oxidizing medium are 15, 20.6 (air), and 25 vol %. The dependences of the maximum explosion pressure ΔP max, maximum explosion pressure rise rate (dP/dt)max, and laminar burning velocity Sui on the hydrofluorocarbon content at various oxygen concentrations in the oxidizing medium are determined. It is shown that, at a relatively low deterrent content Cd (up to 30–50% of the minimum inhibitory concentration of the hydrofluorocarbon, i.e., up to 30–50% of the hydrofluorocarbon content at the “peak” point of the inhibition curve), the maximum explosion pressure is only slightly dependent on C d. It is demonstrated that the larger the molecule of the hydrofluorocarbon, the higher is its inhibitory ability in terms of (dP/dt)max and Sui. A qualitative interpretation of the results is given, based on the concept of additional heat release in the flame front by reactions involving hydrofluorocarbons.

Dynamics of biomacromolecules in coherent electromagnetic radiation field

Abstract: Induced oscillations and periodic displacements of equilibrium positions were shown to occur in biomacromolecules in the absence of electromagnetic radiation absorption because the external electromagnetic field modulates the interaction potential between atoms and groups of atoms forming nonvalence bonds in macromolecules. This “hyperoscillation” state inevitably changes the biochemical properties and conformational transformation times of macromolecules.

On Identification of Anomalies in Multidimensional Hydrogeochemical Data as Earthquake Precursors

Abstract: We consider two nonparametric methods are discussed for identification of anomalies in multidimensional hydrogeochemical data with the goal of forecasting major seismic events. The first method is based on using the threshold copula function aimed at the definition of change moments in the structure of dependencies between the components of a multidimensional vector of observations. The second method is designed to transform multidimensional data to one-dimensional which allows to use rank score tests.

About designing the height of the first profile of the marshalling hump

Abstract: The Height of the high-speed section of the sorting slide. Design of high-speed section of the marshalling hump. To prove mathematically the absence of theoretical basis of the formula by which the height of the first profile section of the marshalling hump is calculated in the current calculation method of marshalling humps. The paper uses the theorem on the change of kinetic energy for a non-free material point in the final form, known from theoretical mechanics. The research results revealed that the formulas by which the height of the first profile section of the marshalling hump is calculated to contradict the theorem on the change of kinetic energy for a non-free material point in the final form. The research results can be used in the processing of the normative-technical document on the design of hump devices on railways and making adjustments to the dynamics of rolling the car in textbooks for universities of railway transport. The results of the calculations proved the incorrectness of the derivation of the formula for calculating the height of the first profile section of the marshalling hump in the normative-technical document “Rules and standards for the design of sorting devices on the railways with gauge 1 520 mm”.