The causes of death of people during a fire, as well as the effect of toxic combustion products on the human body are analyzed. It was found out that the main problem of unhindered evacuation of people from the building is blocking the evacuation routes by smoke. Methods of fighting smoke in a fire are considered and their advantages and disadvantages are determined. One of the ways to solve this problem is ultrasonic coagulation of aerosols with subsequent precipitation. Effective coagulation of smoke in a fire can be provided by a piezoelectric ultrasonic oscillatory system.

Keywords: fire, fire safety, multi-storey public building, toxic combustion products, smoke removal, smoke deposition, high intensity ultrasonic vibrations, ultrasonic radiation, acoustic radiator, piezoelectric ultrasonic oscillatory system

The use of higher aquatic plants (VVR) for water purification from various pollutants is an efficient system in wastewater technologies. For the development of bottom sediments of the river Temernik in Rostov-on-don it is proposed to use remotely operated underwater suction dredger, eliminates the secondary pollution of water. The project of the new landfill for disposal of bottom sediments is a waterproofing geomembrane Blackline TFS on the basis of high-pressure polyethylene and low-density LDPE. In the ""Target environmental program of improvement of the water basin of the river Temernik"", envisages clearing the riverbed with a length of 2 km, construction of disposal site sediments (PSDO), the establishment of biomodule with water hyacinth. During wastewater treatment water hyacinth decomposes and oxidizes industrial and organic sewage into simple elements and absorbs them as nutrition.Long massive root of water hyacinth absorbs heavy metals, oil products, phenols, synthetic surface-active substances (surfactants) and other substances.

Keywords: testing, toxicity, sediment, hyacinth, heavy metals, oil products, geomembrane, polyethylene, degelmintizatsiya

This work is devoted to the automatic generation of verification sets of test procedures; the proposed and developed algorithm for selecting trial solutions for solving the problems of satisfiability of Boolean formulas.

Keywords: test sets, automatic generation, solver, Boolean constraints

The article deals with the estimation of production risk and risk of occupational diseases on the basis of an assessment of the impact on the working factors of the labor process. Analysis of the working conditions according to special evaluation of working conditions. Definition of factors of production environment, harmful to the health of workers and comparative analysis of the working conditions for harmful production factors.

Keywords: occupational risk, harmful and hazardous production factors, identification, conditions of work

Examples of bearings with hydrodynamic wedge are mapped to specific features of the incompressible lubrication (drip liquid) and compressible (gas). Due to the physical nature of the processes occurring in the gas lubricating layer. The main advantages of axial and radial gas dynamic bearing with spiral mikrokanale, which was the most widely and effective used not only as bearings, but also as the best contactless seal.

Keywords: lubrication layer, hydrodynamic wedge, pressure, load capacity, helical grooves, optimal parameters

The project for creation of the first in Russia Engineering Forum of scientific and technological activities, social and technological entrepreneurship “Rozmysly” is presented, this forum develops the principles of an open public interdisciplinary electronic environment. The substantiation of the social significance of the project is given. The new project implies involving an even wider range of practitioners, research engineers, young scientists, applicants, graduate students, students and even senior pupils in scientific engineering knowledge by providing them with the opportunity to publish, read and discuss the results of promising research and development works, engineering solutions, inventions and rationalization or innovative proposals in the form of an electronic preprint. Conceptually, the project represents a new culture of scientific publications based on global and mini Internet platforms. It is shown that the basic advantage is achieved through the implementation of an open access initiative. From the date of publication, the material is available for the widest possible range of readers. The project is a kind of an interdisciplinary scientific and technological engineering forum.

Keywords: site, Internet platform, engineering forum and storage, open access, preprint, foresight

On the basis of Reynolds's equations for thin layers of viscous Newtonian liquid laws of distribution of pressure are found in the incompressible and compressed bearing layers of a step support. For achievement of physically clearer comparison of lubricant properties and the bearing ability of two different lubricant environments the flat model of a step support is used. The algorithms of calculation of carrying power and rigidity of both lubricant layers allowing to pass to statement and the solution of problems of optimization of dimensionless geometrical parameters and comparative integrated characteristics of hydrodynamic and gasdynamic step support of sliding are received.

Keywords: lubricant layer, viscosity, pressure, density, Reynolds's equations, splines, Petrov's number

In article a modelling and experimental survey of the controlled attenuator in a frequency range 2 - 4 GHz is performed. It is received the minimum attenuation no more than 3.5 dB, the maximum attenuation not less than 56 dB at a current 3.8 mA. The amplitude-frequency characteristic unevenness at a current 3.8 mA does not exceed 3 dB. The attenuator design is made in the form of the hybrid module. The attenuator is intended for adjustment of transfer constant of the microwave receiver.

Keywords: attenuator, pin-diode, amplitude-frequency characteristic, control current

The estimation of the dependence of anode potential of the temperature and current density. It is established that the activation energy of the anodic oxidation process HORTA, HORTA-I1 and OITA decreases with increasing potential, which corresponds to the limiting stage of charge transfer. The activation energy of the anodic process refers to the collective processes of transformation of the catalytic coating and anodic oxidation of the chloride ions. The latter process limits the adsorption of atomic chlorine, and the increase in activation energy is correlated with increased corrosion resistance. The dependence of the activation energy of from the content in the catalytic layer of iridium has an extreme character. The maximum is reached when the content of iridium 60-70%.

Keywords: ORTA, ORTA-I1, OITA, activation energy, anodic oxidation, adsorption of chlorine, sodium hypochlorite, chlorine, charge transfer, a mixed oxide, electrode potential

In this work, the impact of the impact of the loads on the work of the optical system of landing the aircraft on the deck of the ship is studied. The influence of a shock pulse from the landing gear of an airplane during interaction with the deck is considered. Also the deviation of the light beams of the optical landing system and the making of constructive solutions for ensuring the required values ​​of the beam deflection are estimated.

Keywords: impact pulse, optical landing system, automation of optical systems design, reduction of light rays deflection

The frequency divider for 32, operating in a range of frequencies 8-18 GHz is considered. The specifics of the schematic diagram is shown. The design and element base is described in short. The model is made and its experimental research is carried out. The technique and the block diagram of the experiment is described. Level of harmonics of an output signal is measured. For decrease of level of harmonics of the useful signal the low-pass filter of type SALF-580 is used. Presence of a parasitic output signal in the absence of an input signal is revelead.

Keywords: frequency divider, microcircuit, experiment, amplitude-frequency characteristic, low-pass filter

The authors solve the problem of effective use of energy sources of wind-diesel hybrid power stations for autonomous electric consumers. A new device connecting energy sources has been developed. Universal voltage converter (UVC) allows to connect both of AC and DC sources with a wide range of rated output voltages. UVC can be used as a part of smart grid or SCADA system. The UVC control system automatically determines the type of the connected power source and issues switching commands for consumer circuits. A 30 kVA UVC prototype was created. The article gives a UVC brief description and presents the results of the prototype research.

Keywords: renewable energy sources, wind-diesel hybrid power station, autonomous power supply system, efficiency increase, industrial control system, hybrid inverter, modified inverter, capacitive storage, universal converter, integration device

the article is devoted to normalization of wind load according to the datas of meteorological stations the example of the city of Volgograd during the period from 2003 to 2012. Obtained the main statistical characteristics, the coefficient of reliability for wind load, wind roses are built.

Keywords: probabilistic design, reliability, wind load

For a research of features of formation of temperature and high-speed fields in volume of the electrosteel-smelting shop at various ways of distribution of stitched air the three-dimensional non-stationary model is used. By results of the made numerical experiment for the description of spatial distribution of air and thermal streams in the shop it is established that the most rational way of supply of stitched air in the considered shops is the way of "flooding of a working zone".

Keywords: microclimate, all-exchange ventilation, air distributor, convective streams, stitched streams, electrosteel-smelting furnaces, speed, temperature

In article traffic safety of vehicles at the movement on crossings is considered. Possibility of a road accident is estimated. In article the initial speed, size of a stopping way of the second vehicle, taking into account overall dimensions of vehicles are determined.

Keywords: street road network, crossing, road accident, traffic safety, initial speed, stopping way