bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of high-kgate dielectrics on the electrical performance and reliability of an amorphous indium–tin–zinc–oxide thin film transistor (a-ITZO TFT): an analytical survey
Authors: Taouririt Taki Eddine , Meftah Afak , Sengouga Nouredine , Adaika Marwa , Chala Slimane , Meftah Amjad
Published: December 2019

This study is a numerical simulation obtained by using Silvaco Atlas software to investigate the effect of different types of dielectric layers, inserted between the channel and the gate, on the performance and reliability of an a-ITZO TFT.
An RNase H-powered DNA walking machine for sensitive detection of RNase H and the screening of related inhibitors
Authors: Wang Yafang , Hu Namin , Liu Chang , Nie Cunpeng , He Manman , Zhang Juan , Yu Qiaoqin , Zhao Chuan , Chen Tingting , Chu Xia
Published: December 2019

A signal amplification strategy based on an RNase H-powered DNA walking machine for RNase H activity detection.
An unexpected surfactant role of immiscible nitrogen in the structural development of silver nanoparticles: an experimental and numerical investigation
Authors: Yun Jungheum , Chung Hee-Suk , Lee Sang-Geul , Bae Jong-Seong , Hong Tae Eun , Takahashi Kazutoshi , Yu Seung Min , Park Jucheol , Guo Qixin , Lee Gun-Hwan , Han Seung Zeon , Ikoma Yoshifumi , Choi Eun-Ae
Published: December 2019

N-Surfactant-facilitated sputter deposition provides strong selectivity for crystalline orientation and facets due to drastic decreases in the surface free energies of Ag nanoparticles supported on oxide substrates.
Metallo-responsive self-assembly of lipophilic guanines in hydrocarbon solvents: a systematic SAXS structural characterization
Authors: Gonnelli Adriano , Pieraccini Silvia , Baldassarri Enrico J. , Funari Sergio , Masiero Stefano , Ortore Maria Grazia , Mariani Paolo
Published: December 2019

Elongation, flexibility and thermal stability of metallo-responsive architectures in dodecane.
A synthetic route to 1,4-disubstituted tetrahydro-β-carbolines and tetrahydropyranoindoles via ring-opening/Pictet–Spengler reaction of aziridines and epoxides with indoles/aldehydes
Authors: Wani Imtiyaz Ahmad , Goswami Gaurav , Sk Sahid , Mal Abhijit , Sayyad Masthanvali , Ghorai Manas K.
Published: December 2019

A route to 1,4-disubstituted tetrahydro-β-carbolines and tetrahydropyrano[3,4-b]indoles in high yields and stereoselectivity via SN2-type ring opening/Pictet–Spengler reaction of aziridines and epoxides with indoles is described.
Design and synthesis of a polyguanidium vector with enhanced DNA binding ability for effective gene delivery at a low N/P ratio
Authors: Chen Zhiyong , Huang Wei , Zheng Nan , Bai Yugang
Published: December 2019

A polyguanidium polymer has extra affinity toward DNA and can mediate transfection efficiently at a low polymer to DNA ratio.
Hyperbranched polydisulfides
Authors: Bej Raju , Rajdev Priya , Barman Ranajit , Ghosh Suhrit
Published: December 2019

Synthesis, aqueous aggregation, hydrophobic guest encapsulation, non-covalent encapsulation stability and glutathione responsive degradation of amphiphilic hyperbranched polydisulfides have been reported.
Aromaticity and tautomerism of a 4n π electron dihydrohexaazapentacene
Authors: Sun Chun-Lin , Luo Xiao-E , Xu Huan , Song Qi-Wei , Fan Zhi-Ping , Wang Xiao-Zhen , Cao Jing-Jing , Shi Zi-Fa , Zhang Hao-Li
Published: December 2019

We report herein the intriguing tautomerism behaviors of new dihydrohexaazapentacene derivatives. The dihydrohexaazapentacene molecules with 4n π electrons exist as two stable tautomers in solution and exhibits globe aromaticity.
Retracted Article: Long noncoding RNA DLEU1 promotes cell proliferation and migration of Wilms tumor through the miR-300/HOXC8 axis
Authors: Ge Wen'an , Wang Shengxing
Published: December 2019

Wilms tumor (nephroblastoma) is the most common primary renal tumor occurring in children.
Nearly spherical CoP nanoparticle/carbon nanosheet hybrids: a high-performance trifunctional electrocatalyst for oxygen reduction and water splitting
Authors: Zou Wenjian , Dou Kunpeng , Jiang Qi , Xiang Jiadong , Kaun Chao-Cheng , Tang Hao
Published: December 2019

The CoP nanoparticles/carbon sheets hybrid structures are highly efficient trifunctional electrocatalytic activities toward the oxygen reduction reaction, oxygen evolution reaction, and hydrogen evolution reaction under alkaline condition.
A high-nuclearity complex containing a decanuclear iron(iii)/oxo cage in a football-like structure and rare (R-/S)-hemiacetalate ligands in a butterfly-like format
Authors: Zheng Chunying , Liang Mingyue , Sun Haofen , Ma Jiping , Bi Xuejun , Zhao Yang , Tan Weiqiang , Li Hui
Published: December 2019

The employment of pyridine-2-carboxaldehyde in high-nuclearity cluster chemistry has provided access to a decanuclear iron(iii)/oxo cage in football-like structure and unusual (R-/S)-hemiacetalate ligands in butterfly-like format.
The design of a multifunctional separator regulating the lithium ion flux for advanced lithium-ion batteries
Authors: Sun Guohua , Guo Jiacong , Niu Hongqing , Chen Nanjun , Zhang Mengying , Tian Guofeng , Qi Shengli , Wu Dezhen
Published: December 2019

A multifunctional PBI porous membrane with superior fire-resistance, excellent thermo-stability and high wettability is designed.
Highly sensitive strain sensors based on hollow packaged silver nanoparticle-decorated three-dimensional graphene foams for wearable electronics
Authors: Wu Xinxiu , Niu Fangfang , Zhong Ao , Han Fei , Chen Yun , Li Jinhui , Zhang Guoping , Sun Rong , Wong Ching-Ping
Published: December 2019

Silver nanoparticle-decorated three-dimensional graphene foams were prepared and packaged with half-cured PMDS films, forming a special “hollow packaged” structure that exhibited high sensitivity for wearable strain sensor applications.
Syntheses, characterization and properties of three coordination polymers with interpenetrating structures comprising 4,4′-(1H-1,2,4-triazol-1-yl)methylene-bis(benzonic acid)
Authors: Zhao Lun , Meng Lingshu , Liu Xin , Guo Guanlin , Xiao Congcong , Liu Haibing
Published: December 2019

The synthesis and characterization of three compounds with H2tmdb ligands is reported. The polymers were analyzed using PXRD, IR, TGA and fluorescence spectrometry.
Effects of size on the photocatalytic properties of high-index faceted pseudocubic and rhombohedral α-Fe2O3 nanocrystals
Authors: Wang Zhuan , Xie Wenyu , Yang Bo , Song Li , Zhao Xueying , Khan Aslam , Yue Fan , Su Xintai , Yang Chao
Published: December 2019

Size-controlled and high-index faceted α-Fe2O3 nanocrystals with pseudocubic and rhombohedral morphologies were synthesized through the hydrothermal treatment of β-FeOOH at different pHs.
The characterization of soybean germ oil and the antioxidative activity of its phytosterols
Authors: Chen Jingnan , Tang Guiyun , Zhou Jinfen , Liu Wei , Bi Yanlan
Published: December 2019

The aim of this study was to characterize the composition of soybean germ and its oil from Northeast (NE-SG) and Shandong Province (SD-SG) of China with a focus on the composition of fatty acids and phytosterols as well as physicochemical properties.
Monitoring glycosidase activity for clustered sugar substrates, a study on β-glucuronidase
Authors: Brissonnet Yoan , Compain Guillaume , Renoux Brigitte , Krammer Eva-Maria , Daligault Franck , Deniaud David , Papot Sébastien , Gouin Sébastien G.
Published: December 2019

Enzymatically-triggered probes to determine glucuronidase hydrolysis kinetics for clustered substrates.
Enhanced thermal conductivity and mechanical properties of a GNP reinforced Si3N4 composite
Authors: Saleem Adil , Zhang Yujun , Gong Hongyu , Majeed Muhammad K. , Jing Jie , Lin Xiao , Ashfaq M. Zeeshan
Published: December 2019

Graphene nanocomposites can significantly enhance the thermal conductivity and mechanical properties of ceramics at relatively low nano-filler addition.
Correction: In situ growth of TiO2/SiO2 nanospheres on glass substrates via solution impregnation for antifogging
Authors: Liu Fang , Shen Jie , Zhou Wuyi , Zhang Shiying , Wan Long
Published: December 2019

Correction for ‘In situ growth of TiO2/SiO2 nanospheres on glass substrates via solution impregnation for antifogging’ by Fang Liu et al., RSC Adv., 2017, 7, 15992–15996.
Redox, transmetalation, and stacking properties of tetrathiafulvalene-2,3,6,7-tetrathiolate bridged tin, nickel, and palladium compounds
Authors: Xie Jiaze , Boyn Jan-Niklas , Filatov Alexander S. , McNeece Andrew J. , Mazziotti David A. , Anderson John S.
Published: December 2019

Capping TTFtt enables facile transmetalation in three different oxidation states.
Formyl-selective deuteration of aldehydes with D2O via synergistic organic and photoredox catalysis
Authors: Dong Jianyang , Wang Xiaochen , Wang Zhen , Song Hongjian , Liu Yuxiu , Wang Qingmin
Published: December 2019

Formyl-selective deuteration of aldehydes with D2O mediated by the synergistic combination of light-driven, polyoxometalate-facilitated HAT and thiol catalysis is reported.
A nuanced approach for assessing OPV materials for large scale applications
Authors: Al-Ahmad Alaa Y. , Almayhi Furqan , Al-Mudhaffer Mohammed F. , Griffith Matthew J. , Liu Wenqing , Li Shuixing , Sivunova Kamilla , Elkington Daniel , Cooling Nathan A. , Feron Krishna , Shi Minmin , Belcher Warwick , Chen Hongzheng , Dastoor Paul , Andersen Thomas R.
Published: December 2019

A systematic approach for assessing organic photovoltaic (OPV) materials for large scale production based on the efficiency, lifetime and material cost has been developed. A Ω of 2.55 results in the following maximum material cost.
Power swing detection and blocking of the third zone of distance relays by the combined use of empirical‐mode decomposition and Hilbert transform
Authors: Taheri Behrooz , Hosseini Seyed Amir , Askarian‐Abyaneh Hossein , Razavi Farzad
Published: December 2019

This study aimed to develop a new method for detecting power swings and faults that may occur during these swings based on the combined use of empirical‐mode decomposition and Hilbert transform. Power swings including line disconnection, fault occurrence, large sudden changes in the demand load, and reclosing, can cause a distance relay to malfunction and sever healthy lines from the network. Therefore, power swings and their simultaneous faults can pose a major challenge to protect the power systems. The proposed method in this study was tested on the standard IEEE 39‐bus network for different power swing and fault states. It was also implemented on a distance relay manufactured by Vebko‐Amirkabir Co. The evaluations show that the proposed method completely outperforms the conventional industrial method and other available methods in the literature. Since the proper functioning of this method depends on the choice of a threshold value, the current study also provides a simple and practical way to determine this threshold.
μPMU‐based intelligent island detection – the first crucial step toward enhancing grid resilience with MG
Authors: Dutta Soham , Reddy Maddikara Jaya Bharata , Mohanta Dusmanta Kumar , Kushwah Makrand Sing , Sadhu Pradip Kumar
Published: December 2019

With the increased climatic change and modern grid complexity, extreme grid power outage events caused by natural calamity and human interruptions have led to an urgency to enhance the grid resiliency. Microgrids (MGs) have proved to be a concrete solution to these situations. However, these events are quite uncertain, leading to the unintentional island of MGs that has adverse effects. Thus, as a first step toward increasing grid resiliency with MG, informing the distributed generations about the unintentional island is a critical task. Hence, there is a need to develop a quick and reliable unintentional island detection scheme. Micro phasor measurement units (μPMUs) are becoming popular in MG. Given this, this study proposes an inadvertent island detection scheme in an MG using an intelligent μPMU. With the μPMU, the voltage at solar generator bus is measured, three features are extracted through spectral kurtosis and random forest classifier is employed for island detection. After island detection, a control methodology is proposed to circumvent the post‐effects. The method has zero non‐detection zone, 99.83% accuracy and a detection time of 20 ms. The reliability of the algorithm is ascertained using the analytical hierarchical approach and software fault‐tree analysis.
Research on the excitation method of symmetrical spiral online detecting sensor of metal debris
Authors: Gu Yuhai , Liu Shuo , Zuo Yunbo , Wang Liyong
Published: December 2019

By connecting the symmetrical spiral inductive sensor to the oil return pipeline of the lubricating oil, a full flow online detection of the size, quantity and other parameters of the tiny metal debris particles in the lubricating oil solution is realised. Inductive sensors are used to excite symmetrical double helix coils, and alternating electromagnetic fields are generated. Changes in induced electromotive force are detected by the centre induction coil. In order to improve the detection accuracy of tiny metal debris particles, the degree of anti‐jamming of the excitation signal, and the transmission distance, a method of stimulating using sinusoidal AC steady current signals was designed. The sinusoidal signal generator is designed based on FPGA, and the sinusoidal AC steady current excitation signal is realised through differential amplification, low‐pass filtering, and AC steady current amplification, and experimental verification is performed to achieve better excitation and detection results.
State of charge prediction for UAVs based on support vector machine
Authors: Wei Kecheng , Wu Jie , Ma Wenbo , Li Huangchou
Published: December 2019

Unmanned aerial vehicle (UAV) is a power‐driven aircraft that is unmanned and reusable. The purpose of this study is to accurately estimate the state of charge (SOC) of lithium‐ion batteries for UAVs. A support vector machine (SVM) method, SVM is a type of learning machine based on statistical learning, is used as the input variable of the battery charging discharge data (current, voltage and temperature). The kernel of the radial basis function is the best kernel of authors’ experiment, where the C, and g values are 1, 0.012 and 0.0125, respectively. The experimental results from the lithium‐ion battery data at NASA Ames Prognostics Center of Excellence demonstrate the potential application of the proposed method as an effective tool for battery SOC prediction. The accuracy of the whole experiment is 98.42%. Mean‐squared error is 1.783%. The experimental results show that the model has higher accuracy in predicting the discharge capacity of lithium battery SOC‐training samples.
Methods of optimizing the phosphate regime of drained peat soils in the northern trans-Urals
Authors: Iglovikov Anatoly , Motorin Alexander
Published: December 2019

The paper presents the results of long-term research to determine the content of phosphorus in drained peat soils and the influence of agro-meliorative techniques on its dynamics. The objects of research were medium-power peat soils on the typical genesis for subtaiga (Yernyakul bog located on the watershed of Tobol and Vagai rivers; Usalskoe bog – on the second floodplain terrace of Tobol river) and forest steppe (Tarmanskoe bog, Reshetnikovo object located on the second floodplain terrace of Tura river) of Northern Trans-Ural region. It has been revealed that the gross phosphorus content in drained peat soils is 0.1–0.3 %. The main part (83.8–95.2 %) of phosphorus in peat soil is in the form of organic compounds. The ratio of mobile phosphorus to its gross content corresponds to 4.8–16.2 %. The mobility of phosphorus during the 40-summer period increases insignificantly and only in the arable layer. The increase in the content of phosphorus is achieved by the use of phosphorus fertilizers and, to a lesser extent, the strengthening of the processes of mineralization of peat. Poor mobility and good availability of phosphorus plants on peat soils allows to put it in stock for 5 years.
Estimation of anti-icing properties of coatings
Authors: Loganina Valentina , Kislitsyna Svetlana
Published: December 2019

The proposed composition for anti-icing coating of metal structures. The composition contains as the filler used aerosil brand R 972 with a density of 2360 kg / m3, particle size of 16 nm and a specific surface 12000 m2 / kg. Silicone resin SILRES® MSE 100 with a 10% concentration was used as a binder. The degree of hydrophobicity was estimated by the value of the wetting angle. In order to characterize the anti-icing properties of the coatings, we used the static and dynamic (advancing and retreating) wetting angle, as well as wetting hysteresis, for which we measured the angles of leakage, and the angles of drift from. Studies of the dynamics of freezing drops on the surface were performed using a TESTO 875-1 thermal imager. It is shown, that the hysteresis of wetting of the superhydrophobic surface based on the developed composition is 3.7 degrees. The critical angle of rolling drops of water from an inclined surface is determined. In the study of the kinetics of freezing of a drop of water on a metal surface, an uneven distribution of temperature on the surface of a drop of water is observed. The process of freezing drops is multistage. In the initial period, there is a transfer of heat from the surface to a drop of water. This stage is followed by the process of freezing the drop, which is manifested in the movement of the freezing front from the substrate upwards.
Justifying the productivity of a grain dryer in the climate of the Southern Urals
Authors: Shepelev Sergey , Vnukov Dmitry , Chumakov Vladimir , Polushkin Oleg , Lebedenko Viacheslav , Ponomareva Svetlana
Published: December 2019

The use of grain-drying complexes is established to make possible to start harvesting before the crops are fully ripened, to shorten the harvesting period, to increase the productivity of combine harvesters and reduce production losses. An economic and mathematical model is developed to justify the productivity of grain-drying equipment, taking into account the rate of grain supplied from the field. Simulation made possible to reveal the rational productivity of a grain dryer taking into account a wide range of natural and production factors. The dependence of the operation of combine harvesters on the moisture content of the grain mass is obtained. It is established that the use of crops with different growing periods in crop rotation makes possible to expand the rational range of harvesting equipment and grain-cleaning complexes, to reduce the total cost of production.
Cluster and correlation analyses of the chemical composition of groundwater nearby MSW landfills
Authors: Nevzorov Alexander , Slesarev Mikhail , Korshunov Alexey
Published: December 2019

In areas of the European North with a low population density and poorly developed transport infrastructure, it is difficult to organize waste removal and storage at large landfills, therefore many settlements have small landfills of municipal solid waste (MSW), and the practice of placing them in swamps is very common, which leads to the migration of pollutants into adjacent rivers. Environmental monitoring nearby such landfills is hampered by high costs of periodic water sampling and chemical composition analyses. It is possible to decrease the number of substances under analysis and thus reduce costs by determining the marker substances, the concentration of which in groundwater near the landfill has stable correlations with the content of other pollutants. The article provides an analysis of the pollutant concentrations in 45 MSW landfills around the world. The results of cluster and correlation analyses made it possible to identify marker substances and establish the target correlation dependences.
Sludge conditioning of oil emulsion wastewater process by heat treatment using low temperatures in Siberia
Authors: Khalturina Tamara , Churbakova Olga , Skolubovich Yuri , Voitov Evgeniy , Tsyba Anna
Published: December 2019

The relevance of this study is due to the problem’s solution of preventing negative impact on the environment during the industrial waste disposal, as well as insufficient high-performance technologies for the treatment of sewage sludge in Siberian severe climatic conditions. Experimental studies of the properties, composition and structure of oil-emulsion wastewater sludge using x-ray phase and thermogravimetric analysis showed that the natural sludge, characterized by high humidity and a high value of specific filtration resistance is in an amorphous state The results of experimental studies on the conditioning process of oil emulsion wastewater sludge by heat treatment using low temperatures in the natural climatic conditions of Siberia are obtained. They can be used to develop effective technologies for processing and utilizing precipitation, which allows solving the problems of reducing the industrial impact on the environment
Degassers in drinking water supply
Authors: Belova Larisa , Zhulin Alexandr , Sidorenko Olga
Published: December 2019

In the Tyumen region, groundwater is widely used for household and drinking water supply, the chemical composition of which is influenced by the increased marshland and peat resistance of soils and, in some cases, the presence of oil and gas-bearing horizons. Underground water typically has a high content of dissolved organic impurities (permanganate oxidability 11.7 - 23.0 mg/dm3), elevated concentrations of free carbon dioxide (20.0 200.0 mg/dm3), hydrogen sulfide (0.20 - 1.95 mg/dm3) and methane (5.3 - 60.0 mg/dm3), dissolved forms of iron (1.14 - 14.00 mg/dm3), manganese (0.02 - 3.80 mg/dm3).

Analysis of iron removal plants operation was performed. Analysis of the region's iron removal plants showed that the process of iron removal of water depends on the degree of saturation of water with air oxygen with parallel removal of dissolved gases. Pre-degassing of water with high efficiency degassers is a necessary link of the process chain even when reagent purification techniques are used.

Analysis and systematization of existing degassers to remove dissolved carbon dioxide have shown that despite the high-efficiency of some degasser models, they are complex in design and require considerable capital construction and operation costs. There is a need to develop a design not complicated in design, having high degassing efficiency at low economic costs.
Ecological and hygienic assessment of environment in the town with glass packaging production
Authors: Martsev Anton , Selivanov Oleg
Published: December 2019

The population of the industrialized centers is constantly affected by the complex of technogenic factors of environmental pollution. The leading technogenic factor is known to impact negatively the population health is air pollution. Technogenic air pollution in cities is caused by the emissions of contaminants both as a result of motor transportation and industrial enterprises. This impact is one of the main reasons for the public health deterioration. Glass production is among such sources. Air pollution with toxic substances causes soil pollution, which ecological and sanitary condition can serve as a marker of environmental pollution rate. The study objective was the ecological and hygienic environment assessment of the Gorokhovets town in the Vladimir region, where modern glass empties production is functioning. Statistics of the regional official services in Gorokhovets district of the Vladimir region, as well as data from our own research have been applied for the research. Heavy metals in soil have been detected by x-ray fluorescence method applying spectrometer “Spectroscan MAX-G”. Anions content in soils was determined using water extracts from soil samples by capillary electrophoresis applying device “Kapel-104”. Results. The statistics published by the official regional state services on the gross amount of air pollutants emissions have been analyzed. Data on the heavy metals (HM) and anions content in various parts of Gorokhovets have been obtained. Conclusion. The ecologic-hygienic assessment of environment allowed to reveal that vehicles make the largest contribution to the air pollution in Gorohovets area in recent years. The main stationary air pollution source n is the glass works “Rusdzham” as first of all nitrogen oxides are its by-products.
Numerical methods for solving inverse problems of fluid filtration to a horizontal well
Authors: Badertdinova Elena , Khairullin Rustem
Published: December 2019

In this paper, a three-dimensional mathematical model of thermohydrodynamic processes occurring in an oil reservoir exposed by a horizontal well after its launch is constructed. Based on the proposed model and the theory of ill-posed problems, a numerical method is proposed for solving the inverse coefficient problem for determining the filtration properties of an oil reservoir. As the initial information, temperature change curves taken simultaneously by several deep autonomous measuring instruments installed in various sections of the horizontal well bore are used. According to the proposed method, the heterogeneity of the reservoir is evaluated along the horizontal part of the well bore.
Tertiary wastewater treatment using bioreactors-clarifiers
Authors: Voitov Evgeniy , Skolubovich Yuri , Kravchenko Victor , Khalturina Tamara
Published: December 2019

The use of technical oxygen instead of air in biological treatment plants can increase their oxidizing ability. Bioreactor-clarifier is a new technical device for tertiary wastewater treatment with the use of oxygen. The design, operation principle and research results of the bioreactor-clarifier for tertiary treatment of urban wastewater are given The use of bioreactors-clarifiers for tertiary treatment of urban wastewater using dissolved technical oxygen allows intensifying the process of biochemical oxidation of organic substances in a contact weighed load and increasing the efficiency of wastewater treatment by BOD and other components.
Methodology for assessment of technogenic contamination in water bodies at urban areas
Authors: Kurochkina Valentina
Published: December 2019

The paper considers the problem of the influence of man-made load on the quality of water and bottom sediments of water bodies. The relationship of the state of the water body, the quality of the water in it and the level of contamination of bottom sediments is established. It has been shown that the rates and volumes of formation of bottom sediments and the level of contamination of their layers are different throughout the existence of a water body, which allows the use of bottom sediments as the main indicator of the ecological state of a water body, reflecting the level of anthropogenic impact on water ecosystems over time.
Spring-back effect during multi-pass bending of sheet blanks
Authors: Kukhar Volodymyr , Nahnibeda Mykyta , Radushev Oleksii
Published: December 2019

A significant factor, which leads to the discrepancy of the final sizes of the bent sheet parts to their drawings is the springing of the sheet blank during bending. At the same time, the springing during multi-pass bending is not sufficiently studied. The purpose of the work is to obtain the graphical and mathematical dependencies for descriptions of the resultative spring-back angle of the blanks at the multi-pass bending, taking into account the width of the blank, number of passes, and pre-bending angle at each preliminary pass. The paper describes the basic information about the difference between the spring-back angle for one-pass or multi-pass bending. In the course of the study it is shown that during calculations of forming and preventive prediction of the geometric quality of bending shapes it is necessary to take into account properties of the blank material, as well as the angles of the prebends and the width to thickness ratio of the blank. A methodology of experimental research was developed for determining the spring-back angle during multi-pass bending in three bending dies with 109°, 91° and 72° pass-by-pass reducing angles.
Chemical reactions at high-speed HFC-boriding
Authors: Katasonov Alexander , Malikov Vladimir , Ishkov Alexey
Published: December 2019

Strengthening of parts and units of machines, increased reliability and longer service life is an important task of modern industry. As an promising materials for protective-strengthening coatings, offered matrix composites based on the ternary system Fe-B-FenB. The article is proposed the complex heating of steel being borated and imbued medium by high frequency currents (HFC), and to combine the diffusion boriding from liquid and solid media and the transition of the diffusion boriding to chemical interaction between the elements of Fe and B. We determined the main components of the reaction-boronizing system, as well as their roles and possible processes that lead to the implementation of topochemical boriding initiated by HFC-heating. Confirmed the course of the reaction leading to the occurrence of reducing agents Ca, Si and active boron in the boronizing mixture.
Cytological diagnosis of infectious conjunctivitis in cats
Authors: Kartashov Sergey , Rakitjanskaya Anastasia , Petrova Marina , Sultanova Maria , Oboeva Maria
Published: December 2019

Cytological examination of conjunctival smears obtained from cats with conjunctivitis can reveal the severity and type of inflammation and diagnose conjunctivitis caused by Chlamydophila felis. The diagnosis of chlamydia was made by the study of material taken from the conjunctival sac with a sterile cotton swab by PCR. Material for cytological examination was taken from these cats. Cytological examination of inclusions interpreted as chlamydial, was detected in all cytologic smears from sick cats, and has not been detected in none of healthy cats. Thus, cytological examination is a convenient, non-invasive, easily feasible method, which is suitable for rapid diagnosis of chlamydial conjunctivitis in cats.
Modern Technologies of Alkalized and Sodic Soils Reclamation
Authors: Zhurba Viktor , Chayka Yevgeniy , Gucheva Natalya , Ushakov Dmitry , Ugrekhelidze Natia , Kulikova Natalia , Egyan Marina
Published: December 2019

The technology of desalination of fine-textured soils using deep tillage, leaching operations and chemical reclamation agents includes the calculation of doses of ameliorants and leaching requirements, methods and timing of reclamation, soil treatment, selection of crops, and the need for fertilizers on reclamation lands. The stages of preparation of the fields before the application of ameliorants are reviewed. Initially, the fields are divided into lots, the location of loose ameliorants clamps is determined. The options for overall and selective land reclamation are considered. When conducting selective reclamation, it is necessary to locate the solonetzic spots and mark them with range poles. The options for cultivating the soil of irrigated lands characterized by increased density of the subsurface soil horizon of more than 1.4 t/m3 are reviewed. The most pressed are the solonetzic soils with a poor structure or without it. The most preferred methods of cultivating degraded soils (deep loosening or plowing) are identified, which are one of the necessary techniques to provide the greatest depth, degree and speed of soil desalinization. The options for leaching of chloride-sulfate loamy soils, chloride-sulfate salinization and soda salinization are considered.
Influence of differential with the limited gear ratio on the efficiency reflecting losses on wheel slip
Authors: Efimov Andrey , Kireev Sergey , Korchagina Marina , Lebedev Alexey , Kaderov Khaidar
Published: December 2019

At vehicle movement, there are two factors that specify conflicting requirements for transfer box drive and axle drive. Let’s describe them: each wheel rotating at different speeds and reduced adherence of one or more wheels. The road conditions: the decrease in friction and kinematic disparity, acting often at the same time, present conflicting requirements to drive of the driving wheels. These factors tend to be of time-varying nature. The nature of the studied processes is transient; it will be influenced by the inertia, stiffness and damping properties of the vehicle power train parts. The efficiency reflecting losses on wheel slip is proposed as a uniform selection criterion of an interaxial drive. Based on comparison of dependence of this parameter on road conditions, higher efficiency of differential with limited gear ratio compared to simple differential and blocked drive is shown. The chosen approach on the basis of quantitative indices proves the efficiency of differential with the limited transfer ratio in comparison with other main types of the drive, such as differential and blocked.
Flood risk management in Allala River (Algeria) using Flood frequency analysis and hydraulic modeling
Authors: Issam Boukhanef , Khadzhidi Anna , Kravchenko Lyudmila , Tsarev Yuri , Groshev Leonid , Polushkin Oleg
Published: December 2019

The objective of flood frequency analysis (FFA) is to associate flood intensity with a probability of exceedance and for making probabilistic estimates of a future flood event in Allala basin based on the historical discharge record at Sidi Akkacha gauging station, the peak floods discharge of Allala river for 5, 10, 50, 100 years return period are estimated using exponential distribution and the stage at different position of river are calculated using HEC RAS model . Based on the modeling study carried out considering 62 cross sections for 8 km length of river, The Output HEC-RAS model show that the existing embankments system on the banks of Allala River is not sufficient to resist the peak flood discharge of 100 years return period, water level profile shows that a maximum of 1.25m in left bank((at 1.2 km downstream) is needed to protect the inundation of the low laying areas of Old tenes.
Innovative approaches to identifying the relationship between the distribution of the concentration of enzymes in the blood serum and skeletal muscle tissue of rats
Authors: Boriskin Pavel , Gulenko Olga , Deviatkin Anatoliy , Karimova Rufia , Pavlova Olga
Published: December 2019

One of the reasons for the increase in disability and mortality among the working population is cardiovascular diseases. Long-term studies of the nature of diseases belonging to this group hypertension, renovascular and malignant arterial hypertension, dyslipidemia, diabetic and dilatational cardiomyopathy, atherosclerosis, ischemic heart disease show that the main cause of pathogenesis is the formation of oxidative stress under the influence of internal and external environmental factors. Mismatch between the processes of free-radical oxidation caused by such active oxygen species as superoxide-anion radical, hydroxide-radical radical, lipid radical, hydrogen peroxide, peroxynitrite, chloric acid and the capabilities of the antioxidant system leads to a disruption of the functional activity of cell structures, displacement of homeostatic balance in the body. Despite the rather deep study of cardiovascular system pathologies, data on the functional activity of myocardial cells under destructive effects and oxidative stress are still insufficient.The article presents the study of the interrelation of the concentration distribution of enzymes of the lipidantioxidant peroxidation system in blood serum and skeletal muscle tissue of white non-pedigree rats. By means of Spearman, Gamma and Kendel Tau correlation coefficients it was revealed a reliable presence of a weak force of inverse correlation between the concentration of catalase in blood serum and skeletal muscle (Spearman R = -0.21 at p < 0.011749, Gamma = -0.14 at p < 0.010977; Kendall Tau = -0.14 at p < 0.010977).
Impact of space and rocket activity on soil cover in central Kazakhstan
Authors: Toktar Murat , Zhubato Zhaylaubay , Stepanova Yelena , Bekeshev Erlan
Published: December 2019

The results of environmental monitoring and integrated assessment of the stability of brown, mostly solonetzic soils and solonchaks to chemical pollution and mechanical stresses at the fall places of the first stage of “Proton” launch vehicle (LV) in the Yu-2 zone (Central Kazakhstan) are provided. With the help of GIS technologies, zoning maps of the investigated territory have been created based on the criteria of soil cover resistance to the impact of space and rocket activity (SRA).
Breakaway of a motor vehicle from skidding with the use of friction material on public and toting roads
Authors: Boyarshinov Mikhail , Zadvorov Vitaliy , Kochetkov Andrey , Yankovskiy Leonid , Chudinov Vladislav
Published: December 2019

The goal of the paper is to provide breakaway of a motor vehicle from skidding with the use of friction material on public and toting roads.The development of an anti-skid device is reasonable because road services are not always able to maintain the proper road conditions due to overall highway mileage which leads to road icing and snow knurling, which in turn lowers the friction coefficient of tires with the road. Model analysis and practical experiments are carried out to model breakaway modes while using friction material. This process can be automated for the use in off-road vehicles with a dedicated device that will deliver large grained friction material. The mentioned device had been developed by the authors of the paper. A technical effect of increased adhesion coefficient is achieved within the research. This effect allows the increase in transportation reliability under difficult meteorological and road conditions on public and toting roads. Practical experiments showed that addition of large grain friction material when skidding modifies the surface in front of the tire into a segmented area (angled surface) that helps the vehicle to breakaway and move further without skidding.
Network high-performance grinding devices for ferromagnetic materials
Authors: Vernigorov Yuriy , Lebedev Valeriy , Frolova Natalya , Leletko Kirill
Published: December 2019

The design features of the grinding devices that implement the impact destruction of the ferromagnetic materials particles in a magneto vibrating layer formed in a non-uniform magnetic field are considered. It is shown that when a magnetizable powder is affected by an alternating magnetic field with certain parameters, a magneto vibrating layer is formed, under the conditions of which, a random perturbing factor occurs. It is caused by the dipole particles clusters interactions and provides highefficient finish powder grinding. Methods for producing metal powders, which are distinguished according to the operating principle and to the requirements for the technological properties of the powders obtained, are analyzed. For coarse grinding, jaw, roller and cone crushers and mullers are used; at this, particles of 1-10 mm in size, which are the source material for fine grinding, are obtained. The finish grinding of the material obtained is carried out on the ball rotating, vibrating or planar centrifugal, vortex and hammer mills. The main drawback of these techniques of metal powder grinding is sticking of grinding body residue on the powder particles, which reduces the quality and operational properties of the powder. A relation to calculate the dependence of the fineness number of ferromagnetic materials on the induction gradient of an external variable magnetic field is proposed. The design features of an electromagnetic mill based on a screw drum that, due to the spatial orientation of its walls, ensures an effective movement of powder flows inside it, such as mixing, rotation, oncoming movement, translational motion and simultaneous advancement through the drum are presented. The concept and technological options of grinding powders in an electromagnetic mobile hammer mill are revealed, which enables to obtain a powder of a given particle size distribution with high uniformity. It is established that mills in which a magneto vibrating layer is implemented are more effective than mechanical ones: grinding of ferromagnetic powders in a magneto vibrating layer increases drastically the performance of the grinding process. Changing the parameters of the electromagnetic field, you can set an average particle size and the degree of homogeneity of the powder.
Study on unified hydraulic drive module with self-adaptation by power and kinematic parameters
Authors: Pershin Victor , Adigamov Kasyan , Khinikadze Tengiz
Published: December 2019

When improving technological drives of machines and equipment, an important role is given to unified self-adapting subsystems and modules under the conditions of stochastic loads due to environmental resistance. The objective of this work is to study the principles of performance commonality and self-adaptation of a patented process hydraulic drive module with a working body that carries out the feed movement and the primary motion. At that, the design options of the module are considered. The principle of module performance commonality is discovered in the presented methodology for its study and conservation. This considers the law, purpose, internal adaptive relationships and the self-adaptation algorithm, which are confirmed by a physical experiment. The process of self-adaptation is presented by a functional block diagram and adaptive relationship equations. The equalities take into account the features of different versions of the module. The results of comparative experimental studies have confirmed that the presence of internal adaptive communications in the module hydraulic system structure provides the principle of its self-adaptation and functional efficiency. A functionunified module can be used in the technological hydraulic systems of machines and equipment to stabilize power and to adapt the kinematic parameters of these movements under the conditions of non-stationarity of values of the power parameters of the environmental resistance.
Residual resource of power resistance during building structures deformation
Authors: Kuzina Ekaterina , Rimshin Vladimir , Neverov Alexey
Published: December 2019

Modern scientific research and design developments, based on the fundamental principles of physics, mechanics and thermodynamics, are developing in a phenomenological direction. This implementation is found both in traditional integrated models of reinforced concrete using the advantages of computer technology, and in discrete models following the grid methods of solid deformable body mechanics. Discrete models in content and chronology over time are hereditary with respect to integral models. The theoretical basis for calculating the residual life of the force resistance to deformation, determines the stiffness of the cross sections of reinforced concrete elements with a maximum bending moment and with zero bending moment are presented in this article.
Reserves and exposure assessment of reinforced concrete structures safety while reducing its power resistance
Authors: Kuzina Ekaterina , Rimshin Vladimir , Neverov Alexey
Published: December 2019

Structural safety of buildings is such an engineering state of the structures operability, foundations, the features of their joint power resistance to expected loads and impacts, taking into account their possible combinations in direction, intensity and mode, which ensures the established functional use with established reliability. The structural safety of buildings depends on design, on compositional and structural solutions, technological measures during construction and operation, which must be provided at all stages of the facility’s existence (construction, operation, repair, reconstruction, dismantling and dismantling). It is necessary to take into account the structural safety parameters of reinforced concrete structures that have received corrosion damage during solving the problems of construction and reconstruction of buildings and structures. Suggestions to quantify the reserves and exposure of structural safety and, accordingly, the reduction in power resistance of corrosion-damaged reinforced concrete structures are presented in this article.
High performance ceramic stones on the basis of by-products of waste heaps - screenings and coal slurry
Authors: Yavruyan Khungianos , Kotlyar Vladimir , Gaishun Evgeniy , Okhotnaya Anastasia , Lotoshnikova Elizaveta , Chanturiya Kristina
Published: December 2019

General description of coal dumps products processing is described: medium factional materials - screenings that do not contain carbon; kiln fractional - coal sand, coal containing up to 30%; petty factional - coal slurries, coal containing up to 50% are given. Ceramic kilns and technological properties of processing coal dumps products are given. Compositions of raw mixtures for obtaining products with a compressive strength of 10-15 MPa and density less than 800 kg / m3, and considering the fact that the molding process is carried out semi-rigid extrusion and the necessity of minimum costs for firing is defined. Depending on the technological properties of screenings, depending on the degree of grinding and firing temperature is taken into account. Flow production of modern equipment is pointed out. Technical and economic indicators showing high profitability and the prospect of large-scale production of clay tiles on the basis of coal dumps processing products due to minimal manufacturing cost are mentioned. The carried out results of the work allowed to choose the raw materials and to develop the technological scheme of production of high-performance ceramic stones with a minimum cost. Implementation of the results in practice will create a highly profitable production and make the Rostov region a major manufacturer of ceramic wall.
Environmental safety of the steppe zone cities within the development of the technique of a «green framework» belt formation
Authors: Yudina Natalia , Lysova Ekaterina , Paramonova Oksana , Samarskaya Natalia
Published: December 2019

The article is devoted to solving the actual problem of creating a comfortable urban environment in the climatic conditions of the southern cities of Russia. The environmental safety of urban areas in the steppe zone can be ensured by forming belts of the «green belt» of the city, based on the use of specific functions of green spaces. The aim of the work was development of an integrated design method for the «green belt» of the city on the example of the territory of Rostov region, based on the analysis of the urban ecological situation, specificity of the regional range of perennial vegetation with the selection of plants that have environmental tolerance to man-made territory. The proposed technique can be used for other physiographic zones of the territory of the Russian Federation on the basis of selection and ranking of environmental and city-forming criteria for designing the «green belt».