bluuebunny/crossref_metadata_2025_split huggingface dataset:
Temperature independence of the heat capacity of liquid water at atmospheric pressure
Authors: Nhan T T , Tuan L 
Published: May 2020

Abstract
Debye temperature and Frenkel temperature of liquid water at atmospheric pressure are estimated from the modified phonon-polariton model. Moreover, the decrease in the Debye temperature and the increase in the Frenkel temperature as rising temperature are pointed out. The heat capacity of liquid water is given by the phonon theory reported in 2012, covering both classical to quantum regimes for both the motion of phonon polariton and the di˙usion motion of particles. Because the ratio between temperature and the Debye temperature varies from 0.8 to 1.5, leading to the temperature independence of the heat capacity of liquid water at atmospheric pressure, in agreement with experimental work.
Dynamics heterogeneity and diffusion mechanism in sodium-silicate melts: Molecular dynamics simulation
Authors: Thi Thanh Ha Nguyen 
Published: May 2020

Abstract
In the present study, molecular dynamics simulation of sodium-silicate has been carried out to investigate microstructure and diffusion. The statistical and dynamical distribution of sodium in sodium-silicate melts with various compositions at 1873 K and ambient pressure has been studied via simplex method. The result shows that the spatial distribution of sodium is non-uniform. There is the simplex contains up to 6 Na and the radius of simplexes varies from 1.4 to 4.5 Å. We find that sodium tends to be in the non-bridging oxygen-simplexes and in larger-radius simplex. The temporal number density of Na around non-bridging oxygen and free oxygens is significantly higher than the one for others region. The static structure is heterogeneous and comprises Na-poor and Na-rich regions. Moreover, the “pockets for sodium” where network atoms having large number density of Na gather is observed. The structure comprises consists of separate micro-regions where immobile or mobile network atoms reside. It turns out that the dynamics is spatially heterogeneous. The Na atoms tend to move along diffusion pathways comprising simplex-regions of networks forming atoms having high number density of Na. The diffusion pathways for sodium consist of simplex-regions of solid-like non-bridging oxygen, free oxygens.
Computational study of µ-opioid receptor embedded in a realistic membrane
Authors: Tran Thanh K. , Nguyen Toan T. 
Published: May 2020

Abstract
Opioids are highly effective analgesics used to alleviate acute, surgical and cancer pains. However, utilization of opioids leads to adverse effects such as nausea, constipation, dizziness, somnolence, vomiting, especially, high addictive liability and drug-induced respiration depression. Ongoing efforts to generate safer opioid analgesics, such as designing biased agonist, peripheral opioids or endogenous opioid analogues, requires thorough understanding of the relationship between structure and function of the main target of opioids - µORs. In this research, the structural and dynamic of a µOR molecule embedded in membrane are studied by molecular dynamics simulation. Our results revealed the influences of disulfide linkage between CYS142-CYS219 and the transmembrane proline and glycine on µOR’s dynamics and structure, as well as, their important role in µOR’s functions.
Dynamics Investigate on Capture Process of rope end Mechanism of Space Manipulator
Authors: Pan Dong , Li Guangping , Zhang Huibo , Dai Shijie 
Published: May 2020

Abstract
The rope end mechanism of large space manipulator satisfies the characteristics of large tolerance and soft acquisition, and is an ideal actuator for space acquisition operation. Based on the discretization method, the dynamic model of wire rope is obtained by flexible spring connection. By introducing the non-linear contact force and friction model between the rope and the target, the capture dynamics model of the end mechanism is obtained. The model is used to simulate and analyze the two acquisition strategies of uniform speed acquisition and FA-SC-VT acquisition. It is found that the collision force is uncontrollable and the target is easy to escape during the acquisition process. To solve the above problems, a motion synchronization acquisition strategy is proposed. The simulation results of the three acquisition strategies are compared and verified by the dynamic model. It is found that the motion synchronization acquisition strategy can effectively reduce the collision force between the rope and the target and improve the acquisition capability compared with the uniform acquisition strategy and FA-SC-VT acquisition strategy. It is of great significance to the dynamics study of the acquisition process of large space manipulator.
Environmentally sound materials from rice straw for elevator decoration
Authors: Liu Junjun , Su Huijuan , Guo Lanzhong , Zhang Ming 
Published: May 2020

Abstract
The main goal of this work was to use rice straw (WS) in the production of environmentally sound materials using corn based adhesives (CA). Treatments of WS with NaOH and hot-water were undertaken to evaluate the effect of such treatments on the performance of produced materials. The influence of material density, starch content and varieties of starch (cornstarch, cassava starch, potato starch) on properties of materials was also investigated. Results showed that cornstarch based materials had higher flexural properties. Materials made from hot-water treated straw and cornstarch had better interface and higher flexural properties, and flexural strength and flexural elastic modulus reached peak values at starch content of 10% and material density of 0.7 g/cm3. Materials made from non-treated straw and cornstarch had lower moisture absorption. Moisture absorption was increasing with starch content increasing and density decreasing. The materials developed from this work may have potential application for ceiling panels and bulletin boards.
Vibration control of nonlinear vibration of suspended cables based on quadratic delayed resonator
Authors: Tang Yiwei , Peng Jian , Li Luxin , Sun Hongxin , Xie Xianzhong 
Published: May 2020

Abstract
Based on Galerkin method and multiple scales method, the first-order symmetric mode responses the suspension cable under longitudinal time-delayed velocity feedback control are obtained. The influence of system parameters, such as time delay, control gain and excitation amplitude on the controlled system, is investigated by the numerical examples. According to the feedback gain increasing, the amplitude of the system response is significantly suppressed. And the efficiency of vibration control can be improved by selecting control gain and the time-delay value.
Blood transfusion or hematopoiesis? how to select between the subsidy mode and the long-term mode of eco-compensation
Authors: Liu Moucheng , Bai Yunxiao , Ma Nan , Rao Didi , Yang Lun , Min Qingwen 
Published: May 2020

Abstract
As a long-term mechanism for eco-compensation, the ‘Hematopoiesis-Compensation Policy’ (HCP) such as industrial transformation can effectively improve the operability and efficiency of compensation policy. However, compared with the ‘Transfusion-compensation Policy’ (TCP) such as the cash subsidy, can HCP quickly achieve the goal of eco-compensation? Does HCP require more total investment in compensation funds? This paper takes the Shennongjia National Park System Pilot Zone (SNJNP) as the research area and takes the eco-compensation policy to encourage farmers to return farmland to forest as the research object. We set three different compensation modes of TCP and HCP, and study the compensation scenarios in the next 20 years. The results show that HCP can achieve the purpose of compensation faster than TCP. Although the annual payment of HCP is relatively higher at the beginning, both the annual expenditure and the cumulative expenditure will decrease significantly. Therefore, later annual expenditure and cumulative total expenditure of HCP will be lower than TCP.
Innovative technological aspects of secondary raw materials processing in juices production
Authors: Donchenko L V , Krasnoselova E A , Konuhova E V , Belousova A I 
Published: May 2020

Abstract
The agricultural sector of the economy is a waste-intensive industry. Production of the basic agricultural product involves a big amount of waste. The output of the target product, as a rule, makes up 15–30% of the full amount of the initial resources. The other part that contains a significant number of valuable compounds is not used in this process and turns into the so-called production wastes, which can become secondary raw materials for an extra product manufacturing. The vast amount of secondary raw materials is created in food and processing industries of agricultural Complex (AC). At the same time, only 50% is used efficiently. This fact proves the relevance of the secondary resources processing problem. The production of apple juice creates 20–30% of wastes that are the industrial source of pectin. As a rule, pectin is extracted from the runoff of late ripening period apples. The objects of this research are the industrial apples cultivars grown in Krasnodar region. The article provides the comparative research results of fractional content of pectin substances in apples with different ripening periods. It defines analytical characteristics of apple pectin extracted from different raw materials. The study states the innovation evaluation criteria for developed technologies. It shows the reasonability of summer period apples processing for production of pectin-containing products and their competitiveness.
Application of reagent-free methods to eliminate the causes of salt deposition in thermal systems on geothermal sources
Authors: Oskin S V , Korzhakov A V 
Published: May 2020

Abstract
The article deals with the problems associated with the formation of scale on equipment and communications in greenhouse complexes with geothermal heat sources. To prevent scale on the equipment and communications in greenhouse complexes, double-circuit geothermal heat supply systems with intermediate heat exchangers are used, in which fresh softened water is heated with geothermal heat, which is then supplied to consumer needs. In the existing system, the heat exchanger and primary circuit communications in contact with the geothermal coolant are subjected to scale formation. Currently, physical, chemical, biological and combined methods of descaling are used. The article presents the results of the research work on the use of reagent-free methods of treatment of geothermal waters at the enterprise CJSC "Raduga". As a result of the conducted research work, it was decided to install an acoustic-magnetic apparatus. A significant reduction in salt deposition was achieved by acoustic-magnetic treatment of geothermal water using an acoustic-magnetic apparatus. The greatest efficiency of water treatment is achieved by combining ultrasound with a magnetic rotating field. Studies have shown that the acoustic-magnetic treatment of water allows one not only to protect effectively the metal from corrosion, but also to remove salt deposits and corrosion products in a heat supply system. Patents of the Russian Federation were obtained for the method of water treatment presented in the article.
The thermal model of winter aggregation of bees
Authors: Oskin S V , Tsokur D S , Sultanov G A , Kudryavtseva A A 
Published: May 2020

Abstract
For successful competition of the Russian beekeepers in the world honey market it is necessary to concentrate their attention on production of separate grades of this product. The most expensive honey is produced in spring and therefore it is necessary that the bees were successful in winter. The use of electric heating of bee hives does not always have a positive effect on the safety of bees in winter. In this regard, it is necessary to study more carefully the complex biological formation - winter bee hives. There were the basic equations for determining the physical parameters of the bee family in winter, including the energy characteristic. The established equations were included in the mathematical models describing the parameters of the microclimate. Mathematical processing of the obtained thermophysical model was carried out in the Comsol software product, which confirmed the validity of the use of the main functional dependencies and allowed to see the critical zones of the hive in temperature and humidity. Despite the large temperature changes outside the hive, it is maintained a fairly stable positive temperature at the level of +25°C to + 32°C inside. Such temperatures are not dangerous for bees. The images of temperature fields obtained in the course of mathematical processing confirm the assumptions that the lowest temperatures are in the lower part of the hive, and the higher ones are in the upper part. The results of the simulation will be used to determine the optimal power supply to electric heaters and to the place of their installation.
The influence of the working bodies of a single-disk centrifugal apparatus on the range of nitrogen fertilizer particles
Authors: Priporov E V 
Published: May 2020

Abstract
The results of studies of blade shape influence on the particles flight range are presented. There are three forms of blades of a single-disc centrifugal apparatus. They are rectangular shape, the rectangular trapezium shape and the isosceles trapezium shape. The rectangular trapezium and the rectangular shapes define a downward trajectory, and the isosceles trapezium shape defines an upward trajectory of the particles free flight. The particles flight range created by blades of a rectangular shape is less than that of the isosceles blade shape. However, the rectangular blade shape sets the trajectory of a free flight less affected by wind speed. The installation of a limiting ring on the blades of the centrifugal apparatus increases the particles flight range.
Bionic modelling of the working bodies of machines for surface tillage
Authors: Babitsky L F , Sobolevsky I V , Kuklin V A 
Published: May 2020

Abstract
The article presents the methods and results of bionic modeling in agricultural mechanics, which made it possible to justify models of working bodies adapted to the soil environment: a tillage ring-cutting roller using modeling of a digging foot of the rhinoceros beetle; a spring soil leveler, where the burrowing limbs of the mole cricket (Gryllotalpa) are used; a stubble cultivator, in the likeness of the forms of a burrowing limb of the scarab beetle (Scarabaeus). The analysis of the results of the tests shows that all the models of working bodies of machines for surface tillage, created by the method of bionic modeling, show a significant decrease in traction resistance in comparison with serial working bodies.
Analysis of promising methods of irrigation and melioration techniques of crops in arid climate
Authors: Tokarev K E , Rogachev A F , Protsyuk M P , Rudenko A Yu , Chernyavsky A N , Tokareva Yu M 
Published: May 2020

Abstract
The paper discusses the problems of optimal regulation of soil water regime under crops. In particular, the water regime of the soil and the experience of irrigation of crops in the conditions of the arid climate of the Lower Volga region are analyzed and promising methods of irrigation and irrigation techniques of crops, including potatoes, are also considered. The conducted research allows us to analyze and summarize the accumulated experience of growing potatoes under irrigation conditions, as well as formulate a number of General provisions for improving the efficiency of reclamation in a dry climate. In addition, studies have shown that despite the high price of irrigation systems, the use of sprinkling is cost-effective in the Southern regions of Russia, where the temperature factor is one of the reasons for the decline in the potato crop. In contrast to mobile machines, stationary sprinkler irrigation systems provide flexible regulation of the irrigation rate and optimal watering frequency. It is noted that another important advantage of sprinkler irrigation is the possibility of using it for processing crops with direct and systemic pesticides. Observations made in experiments have shown that the use of pesticides and sprinkler irrigation makes it possible to virtually eliminate the possibility of various diseases in plants.
The principles of spatial data organization of distribution power networks in geographic information systems
Authors: Khorolsky V Y , Yarosh V A , Burlyaeva V A , Privalov E E , Kobozev V A 
Published: May 2020

Abstract
Spatial data in geographic information systems is organized in various ways. The first method is the principle of layer-by-layer organization of information (it is often called classical), the second is based on the object approach. The choice of models and methods of organizing data in geographic information systems is much more important than the choice of software package since it directly determines many of the functionality of geographic information systems. Some functions are either not implemented for certain ways of organizing data or they are provided by complex manipulations. The article discusses how to organize spatial data for presentation in geographic information systems. The analysis, comparison and justification of the use of an object-oriented method of representing spatial data for the display of rural distribution electric networks in geographic information systems are carried out. The structure of the “object tree” of the supporting scheme of the overhead line of 6-10 kV is proposed.
Wind Turbine Technology: A Strategy to Mitigate Air Pollution through Utilising Wind Energy
Authors: Saad Mohammad , Abakr Yousif Abdalla , Mustapha Khameel Bayo 
Published: May 2020

Abstract
The drive to increase the implementation of alternative sustainable sources is a continuous challenge. The rising awareness of environmental impacts has led the public to demand the development of eco-friendly and dependable long-term solutions. Wind energy is acknowledged as among the best renewable energy sources with proven capabilities. The key contributing factor in defining the harnessing effectiveness is the wind availability and efficiency of the wind turbines at the specific wind conditions. But due to the non-uniform wind distribution and the limitations of the existing wind turbines at low wind speeds, countries with lower wind speed are still far away from exploiting wind energy.
According to the World Energy Commission, the use of one million kWh of wind power can save 600 tons of CO2 emission. An examination into current energy data for Malaysia indicates that only 0.23% of the wind and solar power combined is employed for electricity production as of 2017. This is due to very low wind speed in this region throughout the year. It is also a leading factor to air-pollutants being suspended in the atmosphere for a longer period. It will impact an imbalance in the environmental conditions, such as acid rain, global warming, rise in sea-level and fluctuating sea levels.
This paper reports an investigation into the potential impact of utilizing the advantages of wind energy technology in low speed wind regions as an air-pollutant free energy source, to contribute to the overall reduction of the Air Pollutant Index (API) in localized, impacted areas of Malaysia. This research conducted presents the strategy to utilize low speed wind turbines to decrease air pollution while the system is either On-grid or Off-grid.
Cross-boundary aerosols: a case study of aerosol problem in Bangkok during January-February, 2019
Authors: Janjai S , Pattarapanitchai S , Buntoung S , Masiri I , Tohsing K , Phoman J 
Published: May 2020

Abstract
The event of high concentration of aerosols in Bangkok and its suburb during January-February, 2019 was investigated using ground and satellite-based data. The Hybrid Single Particle Lagrangian Integrated Trajectory Model (HYSPLIT) was also used for the investigation. The results from the investigation implied that the presence of high concentration of aerosols in Bangkok and its suburb during that period was likely due to the cross-boundary aerosols produced from biomass-burning in Cambodia.
Modelling of Land-Use/Land-Cover Change and Its Impact On Local Climate of Klang River Basin
Authors: Azari M , Billa L , Chan A 
Published: May 2020

Abstract
Land-use and land-cover (LULC) change has significant effect on local climate variables such as temperature and rainfall as it alters the energy budget, water budget and atmospheric variables. Past studies have shown urban areas can result in high temperature and alter rainfall amounts and intensity. This study therefore looks at spatio-temporal change in land-use/land-cover, and trends in precipitation and temperature for the Klang river basin. The aim of the study is to determine the effects of these changes in land-use on precipitation and temperature trends. Precipitation data was tested using the Mann-Kendall statistics test. Precipitation amount and two precipitation indices (simple day intensity index (SDII) and R95p) for the full year period and both the monsoons and inter-monsoon periods are tested. For temperature, land surface temperature maps of the study area for the years 1999, 2006 and 2017 was created from the thermal band of the images. Remote sensing is used for modelling spatio-temporal changes in LULC of Klang river basin using multi-temporal LandSat dataset (1999, 2006, and 2017). The LULC modelling shows an increase in urban area of 51.5% from 1999-2017, and decrease in natural vegetation 17.6% and cultivated land 35%. The results of precipitation analysis show a mixture of both positive (increasing) and negative (decreasing) trends for stations in the study area, and for temperature there is an increase of 10.1 °C in maximum temperature from 1999-2017. The correlation test shows a positive correlation between precipitation and temperature, but the relationship is not significant. The LULC change has significant impact on temperature; however, the increasing temperature has an insignificant positive correlation with rainfall. This could indicate that the change in rainfall is mostly due to other factors.
Statistical Forecast Applied to Two Macao Air Monitoring Stations
Authors: Lei M , Monjardino J , Mendes L , Gonçalves D , Ferreira F 
Published: May 2020

Abstract
The levels of air pollution in Macao often exceeded the levels recommended by WHO. In order for the population to take precautionary measures and avoid further health risks under high pollutant exposure, it is important to develop a reliable air quality forecast. Statistical models based on multiple regression (MR) analysis were developed successfully for Macao to predict the next day concentrations of PM10, PM2.5, and NO2. All the developed models were statistically significantly valid with a 95% confidence level with high coefficients of determination (from 0.89 to 0.92) for all pollutants. The models utilized meteorological and air quality variables based on five years of historical data, from 2013 to 2017. The data from 2013 to 2016 were used to develop the statistical models and data from 2017 were used for validation purposes. A wide range of meteorological and air quality variables were identified, and only some were selected as significant dependent variables. Meteorological variables were selected from an extensive list of variables, including geopotential height, relative humidity, atmospheric stability, and air temperature at different vertical levels. Air quality variables translate the resilience of the recent past concentrations of each pollutant and usually are maximum and/or the average of latest 24-hour levels. The models were applied in forecasting the next day average daily concentrations for PM10, PM2.5, and NO2 for the air quality monitoring stations. The results are expected to be an operational air quality forecast for Macao.