In article are considered improvement of the organization of labor protection in the construction, based on a position of system risk management are considered.

Keywords: The risk, injuring factors, labour safety, assessment of the state of labour protection in the organization, improvement of OSH

he urgency of determining the reliability as the main criterion for the reliability of ventilation systems. The approaches to the determination of the reliability of the ventilation system, the criteria for estimating the parameters of their work, the model of the process of prognosis and improve the reliability of the ventilation systems. Therefore, to quantify the reliability of ventilation systems proposed an approach based on the analysis and evaluation of the physical premises of failures.

Keywords: Reliability, mechanical, exhaust, ventilation, technical, system reliability

Each investment project is a difficult product and has a set of financial decisions. As the investment program of development of firm can include some investment projects, investment decisions need to be analyzed not only from positions quantitative, but also from a position of quality indicators of the long-term tasks facing the enterprise. Uncertainty is represented the main mechanism of many considerable economic events as is a component of a production activity. Development of different administrative decisions is influenced usually by risk. When at decision-making we don't take into account possible losses, they are unexpected are transferred heavier. The risk reason as uncertainty is instability of social and economic system. Application of an offered method of risk analysis allows to receive useful information about expected values of the discounted income and net earnings, and also to carry out the analysis of their probabilistic distributions.

Keywords: Investments, projects, decision, resources, deviation, uncertainty, risk, probability, discounting

This article addresses the energy efficiency of heating water boilers that produce energy required for heating, ventilation and hot water. We review the main technological and engineering problem-solving tools of energy efficiency. An integrated approach to the selection of the main and auxiliary process equipment described in this article can significantly improve the energy efficiency of the boiler as a whole.

Keywords: energy efficiency, boiler, thermal circuit, heat, water treatment

Damage control cables in electrical phenomenon is quite common. To prevent cable replacement great lengths in serviceable there is a way to repair it, previously requiring a definition of the place of damage. In this case, you must apply a number of methods to determine the place of circuit lived or their place of breakage. In this case, knowing the resistivity lived control cable can be determined by bridges DC. Methodology and methods of measurement of resistance lived control cables are discussed further in the article.

Keywords: Bridge DC, shops resistance, the sensitivity of the bridge

In article questions rationing in the field of the address of waste are reflected, methods of definition of standards of formation of waste are analysed, their quality standard is carried out

Keywords: waste, the education standard, definition methods, limits on placement, ecological safety

In article efficiency and accuracy медов measurements of noise characteristics of the equipment and cars are considered.

Keywords: The risk, injuring factors, labour safety

The paper presents national practice calculations of economic impacts used in environmental management. Direct and indirect cost economic impact assessment was considered. Particular attention is given to approaches of economic valuation of natural resources.

Keywords: economic impact, direct and indirect cost, risk assessment, replacement value, NPV

Analyzed physical and energetic approach to ensure the environmental safety of the fuel and energy complex as the best, are used in the document evaluation criteria are considered the advantages and disadvantages of the approach

Keywords: energy companies, efficiency, energoemkostny rate, reliability, effektinosti measure of economic, physical-energy approach

Information about authors of issue №4 (2013)

Keywords: authors

The article examines the development of biogas production in the Altai region. Indicates the need for wide implementation in ho-agricultural practice of farms renewable energy.  Provides information about the main raw materials and specific yield volumes of fuel out of it. Argued that there is a potential for the construction of facilities for the production of biogas based on large and medium-sized livestock operations. This can provide up to 20-25% of the demand in the Altai region gas fuel. It is noted that the implementation of this project requires coordination of government support measures with the mandatory inclusion of livestock facilities for biogas in the construction or reconstruction of livestock enterprises. Also priority for biogas energy in the Altai region called the creation of biogas plants with low capacity. They can be used by individuals to meet the challenges of energy supply and heating. Refers to the importance of their implementation in some areas Altai region. 

Keywords: biogas, bioenergy, renewable energy, biofuel, energy-saving technology, aricultural region

The problems of the modification of voltage inverter circuit are considered and using of a DC power source in the realization of function of boosting voltage converter.

Keywords: Active rectifier, voltage converter, inverting converter, multi-channel power supply , the conversion factor.

In article are presented the analytical dependences, characterizing general and fractional efficiency on the basis of the is likelihood-stochastic approach, allowing to plan experimental researches and to develop design procedures of dust removal devices of the enterprises for manufacture of road and building materials. Research of dust properties and optimization on basis of constructive and regime parameters allow to provide demanded efficiency of catching of a dust.

Keywords: "the is likelihood-stochastic approach, fractional efficiency, the dust removal device, optimization of parameters, manufacture of road and building materials "

  The study provides an overview of transformations in the forest sector in Russia, performed by scientists at Petrozavodsk State University, discussed their proposed classification of the historical stages of forest transformation and directions for further research. 

Keywords: research, history, classification, forest sector transformation

In article it is disscused ways of decrease in noise and realization of actions for decrease in professional risk of workers construction industry enterprises working under the influence of high levels of noise.

Keywords: industrial nois, professional risks,labor protection