bluuebunny/crossref_metadata_2025_split huggingface dataset:
International environmental challenges of solar energy production as an integral part of modern green energy
Authors: Makhonko N I , Plotnikova Yu A , Sorokina Yu V , Tarasova E A , Yashina E V 
Published: April 2021

Abstract
The article is devoted to the production of solar energy as one of the most environmentally sound types of modern energy. The authors investigate the state and prospects for the development of solar energy in individual European countries (Spain, Germany, the Netherlands, France, Poland), taking into account measures to ensure the reduction of anthropogenic impact on the environment at the national and international levels. The paper analyzes the main aspects of the influence of this type of energy on improving the quality of the environment in scientific research, development and implementation of the latest technologies in the field of renewable and alternative energy sources. Based on the study of foreign experience of state support for the use of solar energy, the team of authors formulated practical proposals for improving the mechanism of environmental protection in the field of energy.
Main Trends in Morphological Properties of Alluvial Soils under Conditions of Local Pollution with Oil Emulsions (Western Siberia)
Authors: Nosova M V , Seredina V P , Rybin Alexander Sergeevich 
Published: April 2021

Abstract
This paper discusses materials of studying the morphological properties of alluvial soils in the floodplain ecosystems of Western Siberia. It reveals the peculiarities and main regularities of their changes in different pollution zones (the Contamination source being an impact zone). The state of the morphological peculiarities of technogenically polluted soils is compared with background analogs. The article describes the technogenic signs in the upper horizons of chemical-contaminated soils at different levels of oil hydrocarbon (OHC) pollution. There have been identified correlations between the content of total oil hydrocarbons (OHC) in horizon AY v, x and its color parameters measured in the Munsell system.
Assessment of the level of localization of production of equipment for renewable energy
Authors: Gibadullin Arthur 
Published: April 2021

Abstract
The location of production in the regions where these resources are consumed is a relevant and necessary trend for modern states, in this regard, the study is devoted to assessing the level of localization of production of equipment for renewable energy. It was presented in the work that in the coming years in Russia it is planned to increase the volume of generating capacities operating on the basis of renewable resources. In order to achieve this goal, the potential of renewable energy was analyzed in the work, as a result of which it was revealed that Russia has the necessary potential of renewable resources that can be used to generate electric energy. The work evaluated the level of localization of production, which indicates a sufficiently high domestic production of equipment for renewable energy and the planned growth of component production in Russia. At the end of the study, mechanisms are presented to further increase the level of localization of production of equipment for renewable energy.
Prospects for the development of alternative energy sources in the world energy
Authors: Flaksman A S , Mozgovoy A I , Lopatkin D S , Dikikh V A , Shamsov I S , Romanova Ju A , Morkovkin D E , Bovtrikova E V 
Published: April 2021

Abstract
The article is devoted to the prospects for the development of alternative energy sources in the world energy. For this purpose, the article analyzes the modern generation structure in the developed EU countries. Based on this analysis, it was revealed that the share of renewable energy sources together with hydroelectric power plants is comparable to traditional sources of generation. In addition, the study outlines a trend in the development of the world energy sector, which is characterized by an increase in the use of alternative energy sources and a decrease in the use of hydrocarbon fuels. The paper considers the advantages of the development of alternative energy sources and the difficulties associated with their implementation.
Orientation dependence of transformation induced plasticity in high carbon bainitic steel
Authors: Ueji R , Kimura Y , Ushioda K , Ohmura T , Inoue T , Shibata A 
Published: April 2021

Abstract
The crystallographic orientation dependence of the transformation induced plasticity (TRIP) in the high carbon bainitic steel was studied. 0.6% C-2.0% Si-1% Cr steels were austenitized at two conditions to obtain different size of prior-austenite grains. Subsequently, they were austempered to evolve the bainitic structure composed mainly of bainitic ferrite and retained austenite. The characteristic of this sample is that it has much larger amount of carbon content compared with that of the conventional low alloyed TRIP steels. The bainitic steels with different sizes of mean prior-austenite grain show high strength with large ductility. The measurement of electron back scattering diffraction (EBSD) of the samples both before and after the tensile test clarified that much of the retained austenite transformed to ferrite while the austenite grains having the tensile orientation nearly parallel to <111> kept remaining after the fracture. This change indicates that the retained austenite with its tensile axis parallel near to <001> is preferential for the deformation-induced martensitic transformation. This behavior was found in the samples with different prior-austenite grain sizes.
Stereological analysis of triple line orientations
Authors: Schuessler B J , Field D P 
Published: April 2021

Abstract
Determining underlying interface geometries in polycrystalline materials is a daunting task and one that is an ongoing field of materials research. This work utilizes a method of determining structural anisotropy through stereological methods. The orientations of simulated triple-lines were characterized by analysing intersections of the triple-lines on randomly orientated planar sections in a given volume. Using randomly oriented sections, the triple-line orientation distribution, Lv(φ,θ), can be estimated. After approximately 10-100 sections, the true triple-line orientations can be determined with reasonable accuracy. The stereological method proposed is being used to show how it may be useful to the characterization of triple junction character in a real material system. The efficacy of the method was discussed along with considerations to reducing the overall variance in the distributions as well as applying the stereological procedures to real polycrystalline triple junction networks.
Using synchrotron radiation XRD technique to investigate active slip systems during tensile deformation in pure magnesium
Authors: Hirata Masahiro , Okai Daisuke , Adachi Hiroki 
Published: April 2021

Abstract
Active slip systems in pure magnesium specimens with different grain sizes were investigated by the in-situ X-ray diffraction (XRD) technique during tensile testing. From the XRD measurement results, the inhomogeneous strain anisotropy formed by dislocations was obtained. Inhomogeneous strain anisotropy differs in each slip system because hexagonal close-packed metals such as magnesium have anisotropic elasticity. In this study, the dislocation amounts belonging to each active slip system were evaluated utilizing this difference. Coarse-grained specimens had isotropic inhomogeneous strain corresponding to basal slip. Fine-grained specimens showed high elongation and had anisotropic inhomogeneous strain. It is considered that the improvement in ductility occurred by non-basal slip activation near grain boundaries, which increased with grain refinement. Similarly, the ratio of non-basal slip evaluated from the crystal rotation axis increased in the fine-grained specimens.
Features of TRIP steel deformation at low and moderate temperatures
Authors: Frolova A V , Stolyarov V V , Tilak Kumar J V , Sudha J 
Published: April 2021

Abstract
The TRIP effect and tensile behaviour of a TRIP steel were studied at temperatures ranging from -120 to 200°C. The initial microstructure comprises of austenite and martensite (50:50). Excellent combination of UTS (∼2395 MPa) and elongation (28 %) was observed at -100°C and is attributed to the TRIP effect, that found absent above 100°C and below -120°C. Transformation temperatures were studied by DSC and DMA. Analysis of the tensile behaviour, phase changes and fracture surface suggest possible changes in the deformation mechanisms at different temperatures.
Effect of the sol temperature on the structure and thickness of the SiO2 coating of carbon fibers
Authors: Galyshev S N , Gomzin A I , Zaripov N G 
Published: April 2021

Abstract
This paper deals with the development of carbon fiber coatings that act as diffusion barrier, and the role of the weak boundaries in the metal matrix composites. The developed coating will be a cost effective alternative to CVD-coatings. The paper considers the temperature dependence of the structure of SiO2-sol and the coating thickness on the surface of the carbon fibers formed by sol-gel method. Detected sol temperature range optimum for coating. Possible reasons for the observed phenomena are proposed.
Biomimetic design of fibrous composite structures
Authors: Polilov A N , Tatus’ N A 
Published: April 2021

Abstract
The paper is devoted to the analysis of the use of Nature’s methods in the design of composite structures, in particular, with the use of optimal curvilinear paths for laying fibers. In the first part models of different structural levels in macro-, mini-, micro-mechanics of composites are noted. The second part includes analysis of the optimal elastic-strength properties of wood and composites for crack stopping by weak interfaces. The third part is devoted to methods for modeling curvilinear fibers trajectories “flowing around the holes”. In the fourth part the technologies for manufacturing joints are analyzed in which holes are formed using curved fiber trajectories. The fifth part describes the “bio-inspired” principles for the optimal design of composite pipe structures which are similar to multilink bamboo stems. In the sixth part examples of the effective use of fiber composites in elastic elements are considered. The seventh part is devoted to the intensively developing additive technologies of three-dimensional printing of parts made from fiber composites with laying the fibers along the calculated trajectories. The role of composite technologies in creating structures in open space is analyzed.
Analysis of the algorithm for determining the meshing forces in a spline coupling with misalignment
Authors: Nikolaev I V , Leontiev M K 
Published: April 2021

Abstract
In modern engine buildings spline couplings have an important role. These connections can have a serious impact on the dynamic of the system, especially in misalignment conditions. Therefore, assessment its influence on the system is an important task. In this paper the algorithm for determining meshing forces in spline couplings and the influence of various parameters of connections on the meshing forces are analysed. Also the possibilities of further development this algorithm are considered.
Investigation of the contact fatigue strength of high quality carburised steel
Authors: Pakhomova S A , Fakhurtdinov R S , Zhavoronkova E , Zinkovich K 
Published: April 2021

Abstract
The parameters of contact fatigue strength during vacuum carburization and ion nitriding of high quality steel (HQS) HQS-7 and HQS-10 are considered. Information about the modes of chemical and heat treatment is given and the technological process of hardening for HQS-7 and HQS-10 steels is considered. The characteristics of the contact fatigue strength of steels in the statistical aspect at different levels of contact stresses are obtained. A graphical analysis of the obtained values after testing was carried out, the optimal stresses for research were determined and the optimal version of chemical heat treatment was selected, which determines the best indicators for mechanical characteristics and operational requirements.
Programming wave propagation problem in cable of wirerope barrier systems with mathematica
Authors: Demyanushko I V , Karpov I A , Titov O V , Tavshavadze B T 
Published: April 2021

Abstract
The article discusses the issues of modeling of longitudinal and shear waves propagation in the cables of a road cable barrier. The problem was solved using explicit methods with finite deformation. In the first part of the article, the procedure considered, that allows to solve the problem. In the second part, the procedures for P and S waves verified, using analytical solutions and the commercial LS-DYNA code.
Determination of trapped mode eigenfrequencies of an elastic plate with a strip-like delamination
Authors: Golub Mikhail V , Eremin Artem A , Moll Jochen , Sverkunova Diana A , Lammering Rolf 
Published: April 2021

Abstract
Resonance scattering of Lamb waves by strip-like interface delamination is investigated. Trapped mode resonance frequencies of the plate with interface delamination are experimentally studied via the application of the Fourier transform to point-wise measurements along a line obtained using laser Doppler vibrometry. Eigenfrequencies are also calculated employing semi-analytical and mesh-based computational methods. A good agreement between experimentally extracted and numerically predicted trapped mode eigenfrequencies is demonstrated.
On self-synchronization of inertial vibration exciters in a vibroimpact three-mass system
Authors: Shokhin A E , Krestnikovskii K V , Nikiforov A N 
Published: April 2021

Abstract
The dynamics of a vibration machine’s model in the form of a vibroimpact three-mass system with one shock pair, which oscillations are excited by two non-ideal inertial vibration exciters, is considered. The collision of the shock pair elements is modeled on the basis of the classical impact theory. A numerical simulation of the model dynamics at varying the excitation frequency, as well as the parameters of the initial gap and the coefficient of restitution, characterizing the conditions of contact interaction of the machine’s working bodies with the processed material, has been carried out. The influence of these parameters values on the frequency range of stable synchronization of vibration exciters and stable periodic vibroimpact modes of the system motion has been established. It is shown that at the same excitation frequency, a change in these parameters can lead to a change in the periodicity of the vibroimpact mode and the working bodies’ oscillations mode from synchronous-antiphase to practically synchronous-inphase.
Algebraic harmony in genoms of higher and lower organisms. Non-euclidean biosymmetries
Authors: Petoukhov S , Petukhova E , Svirin V 
Published: April 2021

Abstract
The article is devoted to the study of the relationship between non-Euclidean symmetries in inherited morphogenetic and other bio-structures with algebraic features of information sequences of nucleotides in DNA heredity molecules in the genomes of eukaryotes and prokaryotes. These genomic sequences obey the universal hyperbolic rules of the oligomer cooperative organization, which are associated with the harmonic progression of 1/1, 1/2, 1/3, …, 1/n. This progression has long been known and studied in various branches of mathematics and physics, and has now manifested itself in genetic informatics. The performed analysis of the harmonic progression revealed its connection with the double ratio known in geometry, which is the main invariant of projective geometry. This connection consists in the fact that the magnitude of the double ratio is the same and is equal to 4/3 for any four adjacent members of this progression. This fact of the connection of genetic informatics with the main invariant of projective geometry can be used to explain the implementation of non-Euclidean symmetries in genetically inherited structures of living bodies.
Recurrent sequences and the harmonic progression in genetic biomechanics
Authors: Verevkin V , Petoukhov S 
Published: April 2021

Abstract
The article is devoted to the study of new approaches to the development of mathematical models in genetic biomechanics, which studies the structural relationships of the genetic coding system with genetically inherited biological forms. More specifically, we are talking about models based on the recurrent harmonic progression known in science, the universal connection of which with the information sequences of DNA heredity molecules in the genomes of higher and lower organisms was revealed in the laboratory of biomechanical systems research at the IMASH RAS. This progression is associated with fundamental hyperbolic rules for organizing DNA nucleotide sequences of genomes and is represented on a two-dimensional Cartesian plane by a hyperbolic sequence associated with natural logarithms. The latter have long been used in science to adequately model many inherited biological phenomena. The article describes previously unknown connections of natural logarithms with the structure of the molecular genetic system. The problems of modeling biological phenomena in connection with the revealed structural properties of the molecular genetic system are discussed.
Development and research of adaptive control algorithm for road train lateral motion
Authors: Demyanov D N , Khamatyanov R V 
Published: April 2021

Abstract
In the presented work, the problem of control of a road train when it performs various maneuvers while moving along the highway is considered. An adaptive algorithm for controlling the lateral displacement of road train elements is proposed, based on the use of a PD-controller, the values of the coefficients of which depend on the current value of the longitudinal velocity. Computer simulation has been carried out, which has shown the correctness of the proposed algorithm.
Automated robotic assembly of complex workpieces from tiped components forms
Authors: Kozlov P , Klimchik A 
Published: April 2021

Abstract
This paper deals with the automated robotic assembly of complex casting molds from components of regular shape. It addresses the issues of model decomposition and assembly sequence taking into account particularities of the gluing process and shape features. The decomposition parameters were determined by several approximation experiments. The obtained results validated via simulation and experimental study dealing with the assembly of particular workpieces with UR10e robot.
Analytical and Clinical Evaluation of the Semiquantitative Elecsys Anti–SARS-CoV-2 Spike Protein Receptor Binding Domain Antibody Assay on the Roche cobas e602 Analyzer
Authors: Chan Clarence W , Yi Xin , Lenza Michael , Baldwin Angel D , Jakalski Jennifer , Tesic Vera , Yeo Kiang-Teck J 
Published: April 2021

Abstract

Objectives
To analytically and clinically evaluate the semiquantitative Elecsys anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike protein antibody (S-Ab) assay on the Roche cobas e602 analyzer.

Methods
The S-Ab assay is a 1-step, double-antigen sandwich electrochemiluminescent immunoassay that semiquantitatively measures total IgG, IgM, and IgA antibodies specific for the receptor binding domain of SARS-CoV-2 spike protein in serum or plasma. The S-Ab assay was evaluated for precision, linearity, interference (by hemoglobin, bilirubin, triglycerides, and biotin), cross-reactivity, and clinical performance, and was compared to the qualitative Elecsys anti-nucleocapsid (N-Ab) immunoassay, a lateral flow device that qualitatively detects S-Ab and N-Ab, and an anti-spike enzyme-linked immunosorbent assay (ELISA).

Results
S-Ab assay is precise, exhibits linearity from 0.4 to 250 U/mL, is unaffected by significant cross-reactivity or interferences, and qualitatively demonstrates greater than 90% concordance with N-Ab assay and lateral flow device. Readouts of S-Ab assay correlate with ELISA, which in turn correlates strongly with SARS-CoV-2 virus neutralization assay, and exhibit 100% sensitivity and specificity for COVID-19 patient samples obtained at or more than 14 days after PCR positivity.

Conclusions
The S-Ab assay is a robust clinical test for qualitative and semiquantitative detection of seropositivity following SARS-CoV-2 infection or spike-encoding mRNA COVID-19 vaccination.
Urinary tract infection pocket card effect on preferred antimicrobial prescribing for cystitis among patients discharged from the emergency department
Authors: Mixon Mark Anthony , Dietrich Scott , Bushong Benjamin , Peksa Gary D , Rogoszewski Ryan , Theiler Alexander , Spears Lindsey , Werth Joshua , Meister Erin , Martin Matthew Steven 
Published: April 2021

Abstract

Purpose
To evaluate the impact of a urinary tract infection (UTI) pocket card on preferred antibiotic prescribing for patients discharged from the emergency department (ED) with a diagnosis of cystitis.

Methods
A multicenter, retrospective, pre-post study was conducted to compare outcomes following the introduction of a UTI pocket card. The primary outcome was prescribing rates for institutional first-line preferred antibiotics (cephalexin and nitrofurantoin) versus other antimicrobials for cystitis. Secondary outcomes included prescriber adherence to recommended therapy in regards to discharge dose, frequency, duration, and healthcare utilization rates.

Results
The study included 915 patients in total, 407 in the preintervention group and 508 in the postintervention group. The frequency of preferred antibiotic prescribing was significantly increased after the introduction of a UTI pocket card compared to prior to its introduction (81.7% vs 72.0%, P = 0.001). Significant increases in prescribing of an appropriate antibiotic dose (78.0% vs 66.8%, P &lt; 0.0001) and frequency (64.2% vs 47.4%, P &lt; 0.0001) were also found post intervention. No significant differences were seen between the pre- and postintervention groups with regards to healthcare utilization rates.

Conclusion
A UTI pocket card increased preferred antibiotic prescribing for cystitis in the ED. This study provides data on a successful antimicrobial stewardship intervention in the ED setting.