The work presents the review of modern log trucks under the recent sanctions imposed. The author states that the problem of renewing the existing log trucks becomes urgent for forest transporting and logging companies nowadays. There is a wide range of new basic chassis and trucks at the market to build log trucks with a wheel formula 6x4 and 6x6 produced by Russian, Belorussian and Chinese factories. A great number of trailer links is produced to build log trucks. There is an opportunity to buy used trucks of other companies. For the first stage of the technical and economic analysis and preliminary selection of the optimal type and composition of a logging truck, a comparative assessment of the effectiveness of logging trucks was carried out. The analysis shows that Russian log trucks with engine power more than 400 HP (horsepower) can compete with the best foreign models. Nevertheless, the problem of reliability of Russian, Belorussian and Chinese log trucks needs further research.

Keywords: log trucks, trailer links, productivity, effectiveness

At present time, there are attempts to design and produce forest machines of highly-demanded classes in Russia. The paper evaluates the efficiency of forest machines under identical operating conditions. The analysis showed the possibility of using harvesters and forwarders of joint Belarusian and domestic production for logging works as an alternative to foreign forest machines. Evaluation of proposals revealed advanced Russian and Chinese models of forest machines. The research showed that in our country there are prerequisites for the development of forestry machine-building, while the main problem is the lack of production technologies for the manufacture of modern technological equipment and components. Under these conditions, the evolution of production on the national territory of forest machines and technological equipment without involving domestic or foreign capital and innovative technologies is a difficult task.

Keywords: domestic forest machine building, development prospects, forest machines, production

This article reviews systems of respiratory activity registration in relation to sports medicine. Attention is devoted to the use of miniature accelerometers that record the movement of the chest, as the optimal method for the diagnosis of the respiratory parameters. Other methods are based on piezo-resistive sensors, pressure and airflow sensors, and airways resistance sensors. The authors' developed device based on three-axis accelerometer is proposed. It recognizes episodes of apnea with sufficient accuracy for long-term monitoring. The algorithm of the accelerometer data processing is described. In order to minimize noise impact on the useful signal it is necessary to transform the three-dimensional cloud of accelerometer data into a flat sector. Then the relation of gravity vector deviation angle and the nominal position in time is determined. This presented device due to its ability to transmit data via Bluetooth technology, after appropriate software development for mobile phone and the receiving terminal of medical professional, will be able to organize a simple ergonomic long-term remote monitoring of respiratory activity.

Keywords: systems of respiratory activity registration, long-term remote monitoring, three-axis accelerometer