Prospects for Establishment of Technological Complexes in Machine Building Industry on The Basis of Electromechatronic Propulsion Systems

The authors consider prospects for technological complex establishment in machine building industry on the basis of electromechatronic propulsion systems for production of innovative products with different novelty levels: world, state, brunch, region, etc

Hybrid Modeling of Offshore Platforms’ Stress-Deformed and Limit States Taking into Account Probabilistic Parameters

Offshore platforms should be referred to critically and strategically important objects of a technosphere due to technological and operational challenges, on the one hand, and the danger potential level, on the other hand. Environmental, social and economic losses occurred over several decades of accidents and disasters in unique Great Britain, Norwegian. The Russian and the USA platforms were evaluated in death of dozens of operators, destruction of platforms, environment contamination and hence in multi-bullion losses. All of these indicate insufficiency of currently taken engineering solutions, providing structure strength, operational life and safety. The scientific, design, expert and supervising organizations in Russia and in the world are developing and improving mathematical and physical methods, implementing the probabilistic formulations for accidents and disasters, risk assessment and risks reduction on offshore platforms. The solutions of the following problems are included: extension of the comprehensive computational and experimental strength, operational life and survivability analysis to the cases of nonroutine events, accidental and catastrophic conditions; numerical justification of modelling of critical elements, zones and points with the maximum tension, deformations and damages occurring under impacts of external extreme seismic, ice, wind, low temperature; implementation of comprehensive diagnostic methods for damage states evaluation within nonlinear and probabilistic fracture mechanics; and use of new structural design and technological systems for reduction of negative extreme impacts as well as emergency protection systems. The solution of the specified problems is illustrated by case studies of the Russian specialists for each life cycle stage of the platforms offshore Caspian and Kara Seas and Sea of Okhotsk

Modification of the experimental setup of the FTIR spectrometer and thirty-meter optical cell for measurements of weak selective and nonselective absorptions

The improvement of the experimental setup based on a Fourier spectrometer Bruker IFS-125 and a 30-meter multipass optical cell is described. The improvement includes the cell equipment with a system of automated adjustment of the number of beam passes without cell depressurization and ensures the cell work at high temperatures

Исследование влияния краткосрочных силовых тренировок на соревновательные результаты элитных дзюдоистов

Sports performance of elite judo athletes is dependent on the high level of technical skills and physical fitness, including strength capacities: power, muscular strength, muscular endurance and other. This study investigated the effects of short-term (4-/6- or 8-week) specific strength interventions on sports performance in male elite judokas. Thirty six elite male judokas (aged 18–22 years) practiced in short-term (4-/6- or 8-week) strength training intervention added to the regular judo training. To determine sports performance, all athletes were evaluated with regards to their performance during the five judo tournaments within three months in post-intervention. The judokas’ individual sport performance was evaluated in accordance with guidelines of the German potential analysis system (PotAS). There were significant (p≤0.05) differences in sports performance points among the groups in the first judo tournament in favor of judokas, who practiced 4-week strength training intervention. All judokas demonstrated similar mean sports performance points during the second and third judo tournaments. There were significant (p≤0.05) differences in sports performance points in favor of judokas, who practiced 6- or 8-week strength training intervention during the fourth and fifth judo tournaments. The short-term (4-/6- or 8-week) strength training interventions are not equally effective to increase sports performance of elite male judokas within three months in post- strength intervention. The final decision for the specific duration (4-/6- or 8-week) of strength training intervention can be decided according to an judoka’s medal challenges during the competition season: high sports performance in near future (during the month) or an increase in sports performance after one-two monthsСпортивные результаты элитных дзюдоистов зависят от высокого уровня технических навыков и физической подготовки, включая силовые показатели: мощность, мышечную силу, выносливость и др. В данном исследовании изучалось влияние краткосрочных (4-6 или 8 недель) специальных силовых тренировок на спортивные результаты у мужчин-дзюдоистов. Тридцать шесть элитных дзюдоистов-мужчин (в возрасте 18–22 лет) использовали краткосрочные (4-6 или 8 недель) силовые тренировки дополнительно к регулярным тренировкам по дзюдо. Для определения влияния на спортивные результаты все спортсмены были оценены в отношении их выступления во время пяти турниров по дзюдо в течение трех месяцев после окончания силовых тренировок. Индивидуальные спортивные результаты дзюдоистов оценивались в соответствии с руководящими принципами немецкой системы анализа потенциала (PotAS). На первом турнире по дзюдо были выявлены достоверные (р < 0,05) различия в спортивных результатах в пользу дзюдоистов, которые использовали 4-недельные силовые тренировки. Все исследуемые спортсмены продемонстрировали одинаковые спортивные результаты во время второго и третьего турниров. Выявлены достоверные (р < 0,05) различия в спортивных результатах в пользу дзюдоистов, которые практиковали 6- или 8-недельные силовые тренировки во время четвертого и пятого турниров по дзюдо. Установлено, что краткосрочные (4-6 или 8 недель) силовые тренировки не будут одинаково эффективными для повышения уровня спортивных результатов элитных дзюдоистов-мужчин в течение трех месяцев после их применения. Окончательное решение на использование определенной (4-6 или 8 недель) силовой тренировки может быть принято в соответствии с медальными задачами дзюдоиста в течение соревновательного сезона: высокие спортивные результаты в ближайшем будущем (в течение месяца) или увеличение уровня спортивных результатов через один-два месяц

The Forest Observation System, building a global reference dataset for remote sensing of forest biomass

International audienceForest biomass is an essential indicator for monitoring the Earth's ecosystems and climate. It is a critical input to greenhouse gas accounting, estimation of carbon losses and forest degradation, assessment of renewable energy potential, and for developing climate change mitigation policies such as REDD+, among others. Wall-to-wall mapping of aboveground biomass (aGB) is now possible with satellite remote sensing (RS). However, RS methods require extant, up-to-date, reliable, representative and comparable in situ data for calibration and validation. Here, we present the Forest Observation System (FOS) initiative, an international cooperation to establish and maintain a global in situ forest biomass database. aGB and canopy height estimates with their associated uncertainties are derived at a 0.25 ha scale from field measurements made in permanent research plots across the world's forests. all plot estimates are geolocated and have a size that allows for direct comparison with many RS measurements. The FOS offers the potential to improve the accuracy of RS-based biomass products while developing new synergies between the RS and ground-based ecosystem research communities

Prediction of Diamene-Based Chemosensors

This paper presents the results of systematic studies of the atomic structure of the layered bulk, bilayer, and monolayer of diamene (a two-dimensional diamond monolayer recently synthesized by various methods) functionalized with fluorine and hydroxyl groups with the chemical formulas C2F and C2OH. The results of our calculations show that both types of diamene under discussion have a wide optical gap corresponding to the absorption of light in the UV spectral range. The formation of a boundary between these two types of diamene layers leads to a significant decrease in the band gap. Therefore, this layered material, with an interface between fluorinated and hydroxylated diamenes (C2F/C2OH structures), can be considered a suitable material for converting UV radiation into visible light in the orange-yellow part of the spectrum. The adsorption of acetone or water on the C2F/C2OH structures results in visible changes in the band gap. The effect on photoemission is different for different detected analytes. The presence of formaldehyde in water ensures the appearance of distinct peaks in the absorption spectra of structures based on C2F/C2OH. Our simulation results suggest that the simulated C2F/C2OH structures can be used as chemically stable, lightweight materials composed of common elements for a highly selective chemical sensor in liquid and air

Dense random packing with a power-law size distribution: the structure factor, mass-radius relation, and pair distribution function

We consider dense random packing of disks with a power-law distribution of radii and investigate their correlation properties. We study the corresponding structure factor, mass-radius relation and pair distribution function of the disk centers. A toy model of dense segments in one dimension (1d) is solved exactly. It is shown theoretically in 1d and numerically in 1d and 2d that such packing exhibits fractal properties. It is found that the exponent of the power-law distribution and the fractal dimension coincide. An approximate relation for the structure factor in arbitrary dimension is derived, which can be used as a fitting formula in small-angle scattering. The findings can be useful for understanding microstructural properties of various systems like ultra-high performance concrete, high-internal-phase ratio emulsions or biological systems.Comment: 8 pages, 8 figure