Showing papers by "Russian State Agricultural University published in 2016"
TL;DR: In this paper, the authors put forward some results of studies on hydraulic resistance in a corrugated metal pipe with helical corrugation and smooth invert trough, and suggested recommendations for calculating the roughness coefficient for pressure or free-surface water flows.
Abstract: The paper puts forwards some results of studies on hydraulic resistance in a corrugated metal pipe with helical corrugation and smooth invert trough. Recommendations are given for calculating the roughness coefficient for pressure or free-surface water flows. Results of hydraulic studies suggest that pipe filling and slope impacts hydraulic resistance in free-surface flows.
6 citations
12 Sep 2016
TL;DR: In this paper, the spatial and temporal variability of total soil respiration and its components were analyzed for different ecosystems included in the Moscow megalopolis area, in particular, highly impacted areas of urban green lawns were compared to arable lands and urban forest sites.
Abstract: Urbanization is a key land-use change pathway, increasing urban population and resulting in abandonment of rural areas. Urbanization alters profoundly soil properties and functions, including soil respiration [90]. Soil respiration includes heterotrophic (microbial) and autotrophic (root) components. Both are driven by biotic and abiotic factors. Soil respiration and its components in urban ecosystems remain poorly known. In the present study, the spatial and temporal variability of total soil respiration (Rs) and its components were analyzed for different ecosystems included in the Moscow megalopolis area. In particular, highly impacted areas of urban green lawns were compared to arable lands and urban forest sites. Respiration fluxes were monitored during the whole vegetation period. An average Rs was significantly higher for the most disturbed sites, compared to more natural sites. For all the sites, Rh was the dominant component of soil respiration. We report the highest heterotrophic respiration ratio to microbial C (qCO2 = Rh/Cmic) for the lawn land use, followed by arable sites and forest sites, characterized by the lowest qCO2. An average Ra contributed to total Rs only to a minor extent (26%) and increased in all study sites along the season. Ra absolute values and contribution to Rs were similar for different land use types.
5 citations
TL;DR: In this article, the results of thermodynamic calculation of the interaction between energy-saturated self-propagating high-temperature synthesis (SHS) and highly active chemical reagents (HCRs) are given.
Abstract: The results of thermodynamic calculation of the interaction between energy-saturated self-propagating high-temperature synthesis (SHS) and highly active chemical reagents (HCRs) are given. The results of calculation can be used to develop new technologies of joint application of HCRs and SHS in designs of the items the operation of which is based on energy-saturated materials.
2 citations