bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improving the optimization methodology for the structure of agrolandscapes
Authors: Zotova K Y , Nedikova E V 
Published: January 2020

Abstract
The unstable economic situation of agricultural producers and the agrarian sector as a whole necessitates the search for methods of organizing production to ensure stabilization and a consistent improvement of the agricultural sector. The analysis of the territory as the basis of the agro-industrial complex is of great importance, and therefore, it is necessary to develop a combination of optimizing agrolandscapes aimed at improving the efficiency of agricultural production. In this regard, the authors improved the methodology for optimizing the structure of agrolandscapes based on determining the influence degree of the level of anthropogenic load on the ecological condition of the territory, which, in turn, directly depends on the ratio of agricultural lands of the agrolandscape and determining the share of each type of land on the growth of ecological and economic efficiency of the territory. Within the proposed methodology the cumulative impact of natural and anthropogenic factors was assessed using two agricultural enterprises of the Voronezh region as an example. It made possible to comprehensively assess the environmental effectiveness of the study area. This technique of optimizing the structure of the agricultural landscape of enterprises can provide the environmental and economic efficiency assessment of any agricultural enterprise in the Central Black Earth Region of the Russian Federation.
Kinematic study of a robot-weeder with a sprayer function and fertigation
Authors: Ovchinnikov A S , Bocharnikova O V , Vorobyeva N S , Dyashkin A V , Bocharnikov V S , Fomin S D 
Published: January 2020

Abstract
The paper presents the design of a robot-weeder with the function of a sprayer and fertigation for mechanical point-weed destruction and chemical treatment of plants. Based on the kinematic analysis, the optimal geometrical parameters of the constituent parts and components of the structure are obtained, the configurations of the service areas of the cutting tool and the spray nozzle are determined.
State regulation of consumption safety in the Russian Federation
Authors: Bukhtoyarov N I , Vysotskaya E A , Remizov D G , Khuzina N A 
Published: January 2020

Abstract
Food security is considered as the most important component of the national security of the state and as one of the goals of social, economic and agricultural policy, the ways of its achievement are shown. The conditions for substantiating conclusions and conclusions in studies of consumption safety are given. It is proposed to consider security as a characteristic of the quality of a system that determines its ability and ability to self-preservation. Mandatory conditions are given under which safety is ensured, actions to maintain it are indicated, quantitative and qualitative characteristics are given. The main threats and risks to the safety of consumption and ways to prevent them are considered. Attention is paid to international cooperation to create a legal framework in this area. The main regulatory legal acts regulating the sphere of consumer safety in the Russian Federation are given. The corresponding conclusion is made. It is shown that continuous improvement of the food safety system contributes to increasing the efficiency of individual sectors of agriculture and processing industry, as also increasing the competitiveness of their products.
Logistic approach to the production and processing of agricultural products
Authors: Medelyaeva Z P , Zharkovskaya I G , Erofeeva I E 
Published: January 2020

Abstract
AIC is a complex system that includes several areas, a significant number of subcomplexes, a variety of industries, interconnected by logistics flows. It is important that the logistics flows are properly regulated, contribute to the full use of agricultural raw materials, by-products from the processing of raw materials, provide a synergistic effect for all participants in the supply chain. Under the conditions of the Central Black Earth Economic Region, the development of dairy and sugar beet subcomplexes, capable of developing integration ties, improving crop rotation, and providing jobs in the first and third sectors of the agricultural sector, is proposed as system-forming ones.
Results of seeder pneumatic system distributor and aero-product stream flow in the pipeline numerical studies
Authors: Kravtsov A , Konovalov V , Zaitsev V , Petrov A , Petrova S 
Published: January 2020

Abstract
Seed drills with a seed metering device and a pneumatic system of flow stream and distribution of grain seeds to the coulters of the seeder with pneumatic sowing have become widespread in the sphere of agriculture. The aim of this study was to establish the functional dependence of the aero-product stream flow nature in the pipeline and in the grain seeder distributor. The research method involved numerical studies of the developed 3D model of the seeder pneumatic system. The influence of the geometric features of the internal cavity of the distributor top of the seeder pneumatic system, the flow rate in the pipeline in the range from 15 to 25 m/s, the concentration of seeds in the flow stream from 0.52 to 1.57 kg/kg air were taken into account. The values of static, dynamic and total pressure, pressure losses by sections, rates of flow streams in the areas, areas of intense mechanical impact (surface wear) were studied. The regression equations of these indicators have been obtained the factors studied being taken into consideration. The greatest pressure losses have been observed in the distributortops with a cap having the shape of a concave hemisphere. The flat surface of the cap makes it possible to achieve intermediate pressure losses in the distributor top. The smallest pressure loss is observed in the distributor top with a convex cone-shaped cap.
Forecasting of the soil processing units working bodies resource
Authors: Buylov V N , Lyulyakov I V , Makarov S A , Danilin A V , Chekmarev V V 
Published: January 2020

Abstract
The necessity of developing a mathematical model of the calculation and theoretical forecasting of the resource of the working body of the tillage aggregate is substantiated. The formula as a mathematical model is proposed. The results of calculations using this formula made it possible to evaluate several options for hardening the processing of samples and establish preferable ones. These options were samples hardened by boration and surfacing of metal powders in a liquid coolant. The proposed formula allows predicting the value of the resource of the working bodies of tillage and sowing units during their hardening, restoration and manufacturing process.
Identifying reasons for failure of soil processing units of working bodies
Authors: Buylov V N , Lyulyakov I V , Pavlov A V , Rusinov A V , Mezhetsky G D 
Published: January 2020

Abstract
The causes of wear of the working bodies of soil cultivating units are analyzed. The main culling parameters are presented, due to which the working bodies lose their performance. The analysis of factors affecting the degree of wear of working bodies is carried out. Theoretical recommendations are proposed for the creation of an equal-strength tillage unit, the working bodies of which wear out with equal intensity.
Market research of rice cereals
Authors: Maslova G M , Glinkina I M , Kashirina N A , Bailova N V 
Published: January 2020

Abstract
Rice groats are in high demand among buyers. Given the current situation in the rice market, market research conducted to identify consumer preferences and the main factors affecting the choice and degree of satisfaction with the quality of rice cereals aroused some interest. The article gives a brief description of the rice market, its structure, the main stages of development, describes the factors affecting the formation of demand. The research of self-sufficiency and structure of the Russian rice market, growth rates is given. The dynamics of rice export and import in 2018 is presented. A marketing research was conducted aimed at clarifying the preferences of consumers of rice cereals, identifying the main factors affecting their choice and the degree of satisfaction with quality in the market of the Voronezh region. Based on studies for trade enterprises, several recommendations have been developed aimed at increasing demand and increasing cereal sales.
Innovative soil leaching technology: A case study from Bukhara region of Uzbekistan
Authors: Khamidov M Kh , Khamraev K Sh , Isabaev K T 
Published: January 2020

Abstract
The paper presents the results of field experiments on improving leaching technology in salty fields of Bukhara oasis through Biosolvent chemical compound (BChC). Scientific researches were carried in irrigated fields of scientific-research center of Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Bukhara Branch which is located in Bukhara region, Kagan district, during 2017-2019 years. Leaching saline soils through Biosolvent reduces salt content in the active soil layer from 0.417 % to 0.204, while desalinization ratio will be 1.84. With this innovative technology leaching norm was 30% less compared to the control.
Calculation of the power value of additional heat sources for a cylindrical biogas reactor
Authors: Vendin S V , Mamontov A Yu 
Published: January 2020

Abstract
When processing organic waste into biogas, it is necessary to take into account the design features of the equipment, the composition of the raw materials and the technological modes of its fermentation. If there is a lack of heat produced during the chemical fermentation reaction, additional (third-party) heat sources are used to ensure the technological regime. It can be various heat exchangers or electric heaters. The article presents the results of theoretical studies evaluating the power value of additional (third-party) heat sources for heating raw materials in a biogas reactor. The analytical dependences for estimating the power of external heat sources for the considered physical model were obtained on the basis of solving the Fourier heat equation in layered media. The analysis of the influence of design parameters and thermophysical characteristics on the amount of required power of additional (third-party) heat sources, as well as on the distribution of the temperature field in a biogas reactor, is carried out.
Social responsibility and professional competence of safegueard specialists for the quality and safety of food products
Authors: Goncharov V N , Erokhin A M , Ivashova V A , Kolosova O U , Tronina L A , Kamalova O N 
Published: January 2020

Abstract
The article analyses the opinion of technologists in processing enterprises of the Stavropol Territory on the importance of social responsibility and professional competence of workers and how this is reflected in the actual competence profile of the Federal State Educational Standard for graduates of higher education programs. In the quality management system for training future process technologists, the analysis of actual required competencies in the production processes versus to needed competencies of the staff, is a determining factor to be able to update the content of educational programs. The level of professional competence is characterized by different aspects in the business and personal qualities of the specialist: it is reflected in the level of knowledge, skills, and experience needed to achieve the goal in a particular type of professional activity, as well as the moral position of the specialist. These aspects together are reflected in the social responsibility of a process technologist in processing enterprises and ensuring the quality and safety of food products. The opinion of the professional community confirms this viewpoint.
Development of a mathematical model of fuel equipment and the rationale for diagnosing diesel engines by moving the injector needle
Authors: Marusin A V , Danilov I K , Khlopkov S V , Marusin A V , Uspenskiy I A 
Published: January 2020

Abstract
The article discusses the problem of diagnosing diesel fuel equipment. The most common methods for diagnosing fuel equipment are presented. The rationale for diagnosing the technical condition of the plunger elements of the high pressure fuel pump by moving the injector needle is given.
Marketing researches of the modified starch market and the technologies of its production
Authors: Ushakov D S , Shepelev V V , Patlasov Yu O 
Published: January 2020

Abstract
The relevancy of the problem of modified starches production is determined by its diversity by raw materials using in manufacture process (banana, chestnut, tapioca, rice, barley, wheat, corn, potato modified starches), by main consumers (food, construction, oil and gas industries), goals of use (production of biodegradable containers, bio-absorbents, micro composites, bio-lubricants, enzyme technology of nanotechnology). The regional relevance of the study problem is based on the need to produce iodized starches for the food industry consumption. Food products produced from these starches will reduce the thyroid gland incidence, at the same time the magnetized wheat starches production will reduce the cardiovascular disease incidence. The analysis of the Russian and world market of modified starches was conducted. The current state and capacity of the world market of modified starches, trends and technology of various modified starches (phosphate, acetate, cationic, cationic cold swelling starches, etc.) production were studied. Results of the study show that Russia’s export of modified starches has a weak potential for growth. Russian market of modified starches demonstrates a tendency of increase the competition between modified starches manufacturers due to the new participants’ entry in the market. Generally it stimulates the import substitution process. The volume of modified starches imports in Russia is associated with the correlation of manufacturers’ prices and expectations of Russia state support for the deepening of domestic agricultural products processing.
Theoretical and economic studies of a floor duct in the form of cylindrical pipes
Authors: Volkov A I , Maslova L A , Koloshein D V , Borychev S N 
Published: January 2020

Abstract
The article presents the results of studies of a floor duct in the form of cylindrical pipes (utility model patent No. 183361) at farms in Ryazan region, from September 27, 2018 to February 26, 2019. The studies included laying potatoes in three sections of the potato storage having different duct designs (section “A” is an air duct in the form of cylindrical pipes, section “B” is in the form of a front trihedral prism, section “C” is a serial air duct in the form of a semicircle). We also studied the temperature range of the potato bulk ventilated by cooling air in order to clarify the optimal microclimate parameters (temperature, humidity, flow rate) as applied to the conditions of the Central Federal District of the Russian Federation.
Combining multi-scale 3D printing technologies to engineer reinforced hydrogel-ceramic interfaces
Authors: Diloksumpan Paweena , de Ruijter Mylène , Castilho Miguel , Gbureck Uwe , Vermonden Tina , van Weeren P René , Malda Jos , Levato Riccardo 
Published: January 2020

Abstract
Multi-material 3D printing technologies that resolve features at different lengths down to the microscale open new avenues for regenerative medicine, particularly in the engineering of tissue interfaces. Herein, extrusion printing of a bone-biomimetic ceramic ink and melt electrowriting (MEW) of spatially organized polymeric microfibres are integrated for the biofabrication of an osteochondral plug, with a mechanically reinforced bone-to-cartilage interface. A printable physiological temperature-setting bioceramic, based on α-tricalcium phosphate, nanohydroxyapatite and a custom-synthesized biodegradable and crosslinkable poloxamer, was developed as bone support. The mild setting reaction of the bone ink enabled us to print directly within melt electrowritten polycaprolactone meshes, preserving their micro-architecture. Ceramic-integrated MEW meshes protruded into the cartilage region of the composite plug, and were embedded with mechanically soft gelatin-based hydrogels, laden with articular cartilage chondroprogenitor cells. Such interlocking design enhanced the hydrogel-to-ceramic adhesion strength >6.5-fold, compared with non-interlocking fibre architectures, enabling structural stability during handling and surgical implantation in osteochondral defects ex vivo. Furthermore, the MEW meshes endowed the chondral compartment with compressive properties approaching those of native cartilage (20-fold reinforcement versus pristine hydrogel). The osteal and chondral compartment supported osteogenesis and cartilage matrix deposition in vitro, and the neo-synthesized cartilage matrix further contributed to the mechanical reinforcement at the ceramic-hydrogel interface. This multi-material, multi-scale 3D printing approach provides a promising strategy for engineering advanced composite constructs for the regeneration of musculoskeletal and connective tissue interfaces.
Enhanced mechanical properties and wear resistance of cold-rolled carbon nanotubes reinforced copper matrix composites
Authors: Van Duong Luong , Van Luan Nguyen , Ngoc Anh Nguyen , Bao Trung Tran , Danh Chung Le , Quang Huan Nguyen , Thi Nhung Do , Ngoc Minh Phan , Dinh Phuong Doan , Van Trinh Pham 
Published: January 2020

Abstract
Multi-walled carbon nanotube (MWCNT)/Cu composite containing 0.5 vol% MWCNTs were prepared by a high energy ball milling followed by conventional sintering and finally cold rolling. Microstructure studies showed that MWCNTs were uniformly dispersed and implanted inside the Cu matrix. The MWCNT/Cu composites showed an improvement in hardness and tensile strength up to 37% and 44% respectively compared to those of pure Cu. The enhancement is attributed to the uniform dispersion and strengthening due to the addition of MWCNTs. The yield strength of the composite has been quantified by several strengthening mechanisms including grain boundary strengthening, dislocation strengthening, Orowan strengthening and load transfer. The calculated results indicated that the load transfer strengthening has the largest contribution to the yield strength of the composite which implied the key role of the interfacial bond strength between MWCNTs and Cu matrix on the strengthening behaviors. The friction coefficient and specific wear rate of the composites were reduced with the addition of MWCNT content due to the self-lubrication effect of CNTs and high mechanical properties.
Structure and properties of PVA/silk fibroin hydrogels and their effects on growth behavior of various cell types
Authors: Hou Ruixia , Wang Yuxi , Han Jiali , Zhu Yabin , Zhang Hua , Zhang Libing , Li Liping , Xu Kui , Fu Guanglei , Mou Xianbo , Chen Xi , Yang Lu , Nie Lei 
Published: January 2020

Abstract
Controllable regulation of cell behavior is one of the most important factors conducive to the restoration of tissue functions. Recently, various strategies have been developed using physical or chemical cues. Although these techniques are effective, the high cost and complex fabrication procedures impede their application. In this study, we used a low cost and simple strategy to fabricate PVA/silk fibroin composite hydrogels using a cyclic freeze-thaw method. With the increase of freeze-thaw cycles, the pore size of hydrogels decreased, the elastic modulus increased, and the swelling rate decreased. Furthermore, we chose two shapes of model cells, a spindle using bone marrow mesenchymal stem cells and smooth muscle cells, and a round shape using BV2 microglial cells. PVA/silk fibroin composite hydrogels inhibited the adhesion and proliferation of stem cells and muscle cells and changed their cell shape from spindle to round, maintained the initial round shape of BV2 microglial cells, and promoted the proliferation of BV2 microglial cells. These results demonstrate that PVA/silk fibroin composite hydrogels can be used as a novel hydrogel system to regulate cell behavior.
Method screening for conjugation of the small molecules onto the vinyl-coated Fe3O4/silica nanoparticles: highlighting the efficiency of ultrasonication
Authors: Taheri-Ledari Reza , Rahimi Jamal , Maleki Ali 
Published: January 2020

Abstract
Method development for surface functionalization of vinyl-coated iron oxide nanoparticles via [4 + 2] one-pot cycloaddition is presented in this work. Small molecules are loaded onto the surface of silica-coated magnetic nanoparticles (Fe3O4/SiO2 NPs) by various methods. The main factors such as surface modification ratio, core/shell structure maintenance, spherical morphology preservation and particle size uniformity were precisely investigated by various analyses. In this regard, reflux, microwave and ultrasound wave irradiation have been well compared as three different effective methods for carrying out the cycloaddition (CA) reactions onto the surface of magnetic nanoparticles. Overall, it was concluded that the safer and faster method for this purpose is implemented by the ultrasound wave irradiation.
Phonon transport properties of NbCoSb compound
Authors: Ozisik Havva Bogaz , Deligoz Engin , Ozisik Haci , Ateser Engin 
Published: January 2020

Abstract
We present a first-principles study of the phonon transport properties of the Half-Heusler NbCoSb compound. The single crystal elastic constants have been calculated using the stress- strain method. The mechanical properties such as bulk modulus, shear modulus, Young’s modulus, Poisson’s ratio, and anisotropy factor are estimated using the Voigt–Reuss–Hill approximation. The Grüneisen parameters, phonon life time, and lattice thermal conductivity have been studied in detail. The elastic and phonon properties reveal that this compound is mechanically and dynamically stable. An analysis of the harmonic and anharmonic phonon dispersion and vibrational density of states reveal that, NbCoSb has a very low lattice thermal conductivity, hence, it is a candidate thermoelectric material.
Observation of long spin lifetime in MAPbBr3 single crystals at room temperature
Authors: Yang Shijia , Vetter Eric , Wang Tonghui , Amassian Aram , Sun Dali 
Published: January 2020

Abstract
The emergence of hybrid metal halides (HMH) materials, such as the archetypal CH3NH3PbBr3, provides an appealing material platform for solution-processed spintronic applications due to properties such as unprecedented large Rashba spin-splitting states and highly efficient spin-to-charge (StC) conversion efficiencies. Here we report the first study of StC conversion and spin relaxation time in MAPbBr3 single crystals at room temperature using a spin pumping approach. Microwave frequency and power dependence of StC responses are both consistent with the spin pumping model, from which an inverse Rashba–Edelstein effect coherence length of up to ∼30 picometer is obtained, highlighting a good StC conversion efficiency. The magnetic field angular dependence of StC is investigated and can be well-explained by the spin precession model under oblique magnetic field. A long spin relaxation time of up to ∼190 picoseconds is obtained, which can be attributed to the surface Rashba state formed at the MAPbBr3 interface. Our oblique Hanle effect by FMR-driven spin pumping technique provides a reliable and sensitive tool for measuring the spin relaxation time in various solution processed HMH single crystals.