bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparative study of smartphone screens using numerical analysis
Authors: Magomedov I A 
Published: January 2020

Abstract
This work is focused on investigating smartphone screens using numerical analysis. Two smartphone screens are presented in this work for comparison. Apple and Samsung products will be analyzed, which are Sapphire and Gorilla Glass respectively. Extended finite element method and cohesive zone model for numerical analysis will be used. Software packages of Ansys, Code-aster and Salome Meca were used in this work for analysis to initiate and propagate crack in chosen structure. Brief introduction and literature review of the problem also presented in this work. To gather results for numerical analysis two different structure was build in software Ansys. Wedge shaped structure was built and analyzed to gather results of deformation. First analysis was done by using material properties of Gorilla Glass and second applying material properties of Sapphire. The results illustrated that Samsung product Gorilla Glass is more deformed if to be compared with Sapphire. Then a square shaped structure was created and was tested on fracture. Two different values were used to fracture the structure. The results showed that it is harder to fracture Sapphire than Gorilla Glass. Lastly crack propagation was analyzed. It was found that Gorilla Glass has less propagation than Sapphire.
Control system for a process of fermentation unit based on a fuzzy controller
Authors: Muravyova E A , Abdrafikova F F 
Published: January 2020

Abstract
We have developed control system for a fermentation unit process based on a fuzzy controller. The objects under control are fermentation tanks located at “Bashspirt” Joint-Stock Company. The process of saccharifiedwort fermentation is carried out by yeast. The task was to improve the process of fermentation of saccharifiedwort by yeast and replace the outdated control system with a newer and more modern one. In this regard, a fuzzy controller system has been designed to control the process of fermentation unit capable of controlling the following twelve output parameters: valve position for supplying wort to six fermentation tanks and for supplying yeast to six fermentation tanks. Twelve control output parameters control the following seven input parameters: the fill level of the prefermenter, the fill level of six fermentation tanks. The output parameters are controlled on the base of the information obtained from the wort and yeast input level sensors. The introduction of an automatic control system that takes into account the basic parameters of a multi-connected object and is capable of controlling the entire process of the fermentation unit allowed to solve the following problem: stabilization of the input parameters and the output process parameters control.
Management of mechanisms ensuring sustainable functioning and economic development of the electric power complex
Authors: Gibadullin A A , Kerimova Ch V , Chorshanbiev S R , Shmanev S V , Romanova Ju A , Sozontov A A 
Published: January 2020

AbstractThe study is dedicated to ensuring sustainable functioning and economic development of the electric power complex. The article analyzes the impact of the fuel and energy complex on the economy of the Russian Federation. The paper presents the stages of the formation of the electric power industry, which ensures the functioning of industrial production and the vital activity of mankind. The study proved that the electric power complex is a capital-intensive industry and is connected by a single technological process. Of course, in order to maintain the stability and efficiency of the industry, it is necessary to ensure the management of the stable functioning and economic development of the electric power complex. The study analyzed the definitions of stability, which contain a set of indicators containing both technical and technological parameters, and economic. Based on the results of the study, factors were formulated that affect the sustainable functioning and economic development of the electric power complex. In conclusion, the study presents the main findings and results of the work.
Automated systems of ecological control in Norilsk
Authors: Karmanovskaya N V , Smirnova A T , Litovchenko V I , Efa S G 
Published: January 2020

Abstract
Nowadays the problems associated with the implementation of environmental control in the Russian Federation are becoming increasingly relevant. Unfortunately, there are a lot of reasons why our country cannot boast of success in resolving issues that could positively affect the preservation of a favorable environment. The problem of automated systems of ecological control in Norilsk is considered in this article. Models of production and public control of the atmosphere are described. The model aimed at the implementation of the constitutional rights of each citizen to reliable information on the state of the environment is proposed. Environmental education acts as a tool for the implementation of the law, an integral part of which is environmental information.
Resource of repaired welded compounds of marine oil and gas structures
Authors: Starokon I V 
Published: January 2020

Abstract
The article deals with the assessment about service life of welds for offshore oil and gas facilities. Research covered offshore fixed platforms (OFP) of the core type. It is noted that to date, any studies have not been undertaken on the service life of reconditioned (repaired) OFP welds. Through specialized software systems StructureCAD and SolidWorks, models of offshore platforms were built and maximum amplitudes of alternating stresses acting in welds in the Black Sea were established. As results of the tests and processing observed data, the endurance limits of the repaired welds were calculated, which amounted to approximately 13 MPa (1885.49 psi). We also obtained characteristic points of the dependence of the number of cycles to failure N on the values of the amplitude of the alternating stresses σa. The experiment made it possible to create fatigue diagrams for restored welds of offshore fixed platforms. Using the example of a T-type welded joint, it was shown that the service life of a restored weld is much lower than the service life of a new one.
Application of hydrogen and hydrogen-containing gases in internal combustion engines
Authors: Afanasiev A N , Pavlov D A , Epishkin V E , Gapchenko U A 
Published: January 2020

Abstract
The results of studies of the influence of hydrogen and hydrogen-containing gas additives on the parameters of various types of internal combustion engines are analyzed and summarized. It made possible to identify the features of the effect on the combustion of fuel during internal combustion engine operation at partial loads. The dependences of reducing the toxicity and fuel consumption of internal combustion engine on the amount of addition of hydrogen and a hydrogen-containing gas to the air-fuel mixture were obtained. It allowed to establish quantitative effects of free hydrogen, in particular, to quantify the region of small hydrogen additives and the conditions under which hydrogen exhibits the qualities of a chemically active component of the mixture.
Robotic power line maintenance systems
Authors: Solyonyj S V , Shishlakov V F , Solenaya O Ya , Kuzmenko V P , Kvas E S , Rysin A V 
Published: January 2020

Abstract
When transmitting electricity over long distances, overhead power lines are used. When servicing the lines, brigades of workers performing manual inspection are used. This collection of information is not efficient and time-consuming, since it is possible to identify only those problems that a person can see. Problems such as the destruction of insulators, the slope of the poles of power lines, a small layer of icing will remain unnoticed and will lead to serious consequences, such as a break in power lines and falling poles. If the lines are broken and the supports fall, the repair team will have to drive the entire section of the power transmission line from start to break, if the terrain allows you to use ground transportation. Provided that some lines can stretch for hundreds of kilometers - troubleshooting can stretch for several hours or even days. The use of robotic systems will prevent such accidents, and in case of their occurrence due to force majeure circumstances, speed up the search and repair. The likelihood of electric shock will also be reduced.
Power supply with increased specific energy intensity based on hydrogen fuel cells for unmanned aerial vehicle
Authors: Vasyukov I V , Pavlenko A V , Gummel A A , Puzin V S , Faddeev N A 
Published: January 2020

Abstract
The structure of a power source based on hydrogen fuel cells for an unmanned aerial vehicle is described in this article. A functional diagram of the power plant is presented. The method for calculating the power part of a step-down voltage converter is proposed. The idea of improving the accuracy of optimization of power plants by flight time of the unmanned aerial vehicle (drone) is proposed. Design features and the operating algorithm of an experimental source with a specific energy consumption of 529.3 W * h / kg are described
Biofuel based on methanol and methyl ester of rapeseed oil for diesel engine
Authors: Likhanov V A , Lopatin O P , Yurlov A S 
Published: January 2020

Abstract
In order to improve the environmental performance of diesel engines, the use of renewable energy sources such as biofuels is justified. The factors influencing the processes of fuel combustion and issues allowing to properly provide the necessary conditions for the combustion of biofuels in the combustion chamber of diesel are considered. As a result of experimental studies developed biofuel for diesel engine consisting of methanol and methyl ester of rapeseed oil. Experimental studies of the efficiency and environmental performance of the diesel engine on this biofuel have been carried out.
DEA method application to evaluating the efficiency of heat and wind generating complexes
Authors: Zenyutkin N V , Kovalev I V , Karaseva M V , Dvirny V V , Melkomukov A A , Lukonin N V 
Published: January 2020

Abstract
The article considers the thermal power enterprises’ impact on the ecology of Krasnoyarsk Krai. It gives the characteristic of the general state in the region’s heat power industry taking into account problems of providing heat to remote communities. A heat and wind generating complex is considered as an alternative thermal energy source. The problem of calculating the efficiency of such complexes is introduced. The DEA method based on the calculation of the boundary performance is treated. The input and output parameters of modern heat and wind generating complexes are described. The DEA method modernization based on the adjustment factors generation is justified.
Green synthesis of cobalt oxide nanoparticles for potential biological applications
Authors: Hafeez Muhammad , Shaheen Ruzma , Akram Bilal , Zain-ul-Abdin  , Haq Sirajul , Mahsud Salahudin , Ali Shaukat , Khan Rizwan Taj 
Published: January 2020

Abstract
Cobalt oxide nanoparticles (Co3O4-Nps) have many applications and now a days the green methods of synthesis of these NPs are preferred over other methods because of associated benefits. In this study, Co3O4-Nps were synthesized by using leaves extract of Populus ciliata (safaida) and cobalt nitrate hexa hydrate as a source of cobalt. The synthesized NPs were analyzed by different techniques such as fourier transform spectroscopy (FTIR), x-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Antibacterial activities of the synthesized Co3O4-Nps were evaluated against gram negative and gram positive bacteria and found active against Escherichia coli (E. coli), Klebseilla pneumonia (K. pneumonia), Bacillus subtillus (B.subtillus) and Bacillus lichenifermia (B. lichenifermia). The activity results were analyzed statistically by one-way ANOVA, with ‘Dunnett’s Multiple Comparison Test’. The maximum mean activity (21.8 ± 0.7) was found for B. subtilis and minimum mean activity (14.0 ± 0.6) was observed for E. coli.
Influence of strain rate on microstructures and mechanical properties of 2524Al alloy fabricated by a novel large strain rolling
Authors: Feng Xvhui , Sun Youping , Zhou Sipeng , He Jiangmei 
Published: January 2020

Abstract
2524Al alloy sheets with excellent strength-ductility balance were successfully fabricated by large strain rolling in a strain rate range from 5 s−1 to 20 s−1 at 400 °C. The microstructural evolution, mechanical properties and fracture mechanism of the as-rolled sheets were investigated. The results show that there are numerous coarse precipitates of Al2CuMg and Al2Cu along the dendrite grain boundaries for as-cast 2524Al alloy. Most of the precipitates disappear after homogenizing annealing treatment. Grain refining plays a key role in the as-rolled microstructural evolution and the mechanical properties. The dendrite grain were broken and become streamline structure after rolled. The sheet fabricated at 10 s−1 exhibits a higher strength and excellent ductility, with the ultimate tensile strength and elongation of 611MPa and 10.5%, respectively.
Effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91-xLa/Nd alloy
Authors: Cui Pengxing , Hu Maoliang , Ji Zesheng , Xu Hongyu , Zhang Xun , Liu Meng 
Published: January 2020

Abstract
The effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91D alloys were investigated. The alloys were produced by casting the molten metal into a preheated steel mould. Microstructures were investigated by XRD and SEM (equipped with EDS). The hardness measurement was carried out by Brinell hardness (HB) digital display tester. Compression tests were conducted at both room and high temperatures (20 °C and 150 °C). Microstructural characterizations reveal that the area fraction of the β-Mg17Al12 phase changed with the variation of La/Nd ratio. The area fraction of the β-Mg17Al12 phase decrease significantly and then increased slightly with the increase of La/Nd ratio. Besides, the results show that the addition of La and Nd contributed to the formation of needle-like phase Al11RE3. Meanwhile, the Brinell hardness and high-temperature compression properties of this alloy reach the maximum values (67 HB and 330 MPa, respectively) when the La/Nd ratio is 2/3. In this alloy, the amount of Al11RE3 phase is 51/TA and the average length is 69.55 μm. Moreover, a generation model of Al11RE3 is established and the growth mechanism of Al11RE3 is analyzed. This work thus has proved that La/Nd ratio has a great effect on the microstructure and mechanical properties of AZ91.
Kagome metal-organic frameworks as a platform for strongly correlated electrons
Authors: Fuchs Marius , Liu Peitao , Schwemmer Tilman , Sangiovanni Giorgio , Thomale Ronny , Franchini Cesare , Di Sante Domenico 
Published: January 2020

Abstract
By using first-principles calculations we put forward the Cu-dicyanoanthracene lattice as a platform to investigate strong electronic correlations in the family of Kagome metal-organic frameworks. We show that the low-energy model is composed by molecular orbitals which arrange themselves in a typical Kagome lattice at n = 2/3 filling, where the Fermi level lies at the Dirac point. The Coulomb interaction matrix expressed in this molecular orbitals basis, as obtained by large-scale constrained random-phase approximation calculations, is characterized by local U and non-local

U
′

parameters exceeding more than ten times the Kagome bandwidth. For such Kagome systems, our findings suggest the possible emergence of peculiar electron–electron collective phenomena, such as an exotic valence bond solid order characterized by modulated bond strengths.
The recent development of soft x-ray interference lithography in SSRF
Authors: Zhao Jun , Yang Shumin , Xue Chaofan , Wang Liansheng , Liang Zhaofeng , Zhang Lei , Wang Yong , Wu Yanqing , Tai Renzhong 
Published: January 2020

Abstract
This paper introduces the recent progress in methodologies and their related applications based on the soft x-ray interference lithography beamline in the Shanghai synchrotron radiation facility. Dual-beam, multibeam interference lithography and Talbot lithography have been adopted as basic methods in the beamline. To improve the experimental performance, a precise real-time vibration evaluation system has been established; and the lithography stability has been greatly improved. In order to meet the demands for higher resolution and practical application, novel experimental methods have been developed, such as high-order diffraction interference exposure, high-aspect-ratio and large-area stitching exposure, and parallel direct writing achromatic Talbot lithography. As of now, a 25 nm half-pitch pattern has been obtained; and a cm2 exposure area has been achieved in practical samples. The above methods have been applied to extreme ultraviolet photoresist evaluation, photonic crystal and surface plasmonic effect research, and so on.
Development of an evidence-based residency preparation checklist using a Delphi process
Authors: Beckett Robert D , Linn Dustin D 
Published: January 2020

AbstractPurposeTo develop an evidence-based tool that will provide concise guidance to pharmacy students who want to become competitive postgraduate year 1 (PGY1) residency applicants.MethodsA systematic literature search was conducted to identify articles describing student or school factors and specific interventions or activities associated with improved or decreased residency match rates, as well as studies describing residency program directors’ (RPDs’) or preceptors’ perceptions of qualified applicants. An initial checklist was developed, with an item for each relevant factor. A consensus on checklist items was built through a 2-round Delphi process with a panel of RPDs. Ultimately, items that received a median score of at least 5 on a 7-point scale with less than one-third of the ratings being a 1, 2, or 3 were included.ResultsThe initial checklist of 34 items, primarily related to grade point average, professional involvement, work experience, or professional development, was evaluated by a panel of 25 RPD participants. Six of 34 items (18%) were reevaluated in round 2, along with 1 added item and 4 items substantively modified based on comments; 2 items were merged. Ultimately, 33 items met the criteria for consensus and were included in the final checklist.ConclusionA checklist of items to guide prospective pharmacy residency applicants was developed through a systematic literature search and verified by program directors using a Delphi process.
Analysis of heart and neural crest derivatives-expressed protein 2 (HAND2)-progesterone interactions in peri-implantation endometrium†
Authors: Šućurović Sandra , Nikolić Tamara , Brosens Jan J , Mulac-Jeričević Biserka 
Published: January 2020

AbstractImplantation is restricted to a narrow window when the local endometrial microenvironment is supportive of the invading embryo. The ovarian steroid hormones estrogen (E) and progesterone (P) are principal regulators of uterine receptivity. Suppression of E-dependent proliferation of luminal epithelium (LE) by P is mandatory for embryo implantation. Here, we report that the balance of E receptor α (ERα) and P receptors (PR) activity controls HAND2 expression, a key transcription factor that determines the fate of the implanting embryo and thereby pregnancy outcome. As a model, we used wild-type mice as well as mice in which either both PR isoforms or the A-isoform was genetically ablated (PRKO and PRAKO, respectively). Detailed spatiotemporal analyses of PR, HAND2, and ERα expression at implantation site demonstrated co-expression of HAND2 and PR but not ERα. Furthermore, in hormonally treated ovariectomized WT, PRAKO and PRKO mice, E suppresses endometrial HAND2 expression. Adding P together with E partially rescues HAND2 expression in WT, but not PRAKO and PRKO animals. Therefore, infertility in PRAKO mice is at least in part associated with the loss of PR-A-regulated HAND2 expression.
The blueprint of RNA storages relative to oocyte developmental competence in cattle (Bos taurus)
Authors: Walker Bailey N , Biase Fernando H 
Published: January 2020

Abstract
From the time oocytes leave quiescence, there are constant microenvironmental influences contributing to development, thus acquiring developmental competence is not a simple, linear phenomenon. During folliculogenesis, oocytes experience many morphological and cytological changes that contribute toward the acquisition of developmental competence, a process defined by an oocyte’s ability to progress through folliculogenesis, be fertilized, undergo cleavage, and develop into an embryo. Many factors, such as ovarian follicle size, cow age, and the morphology of the cumulus–oocyte complex, have been extensively investigated to understand this process. In parallel to aiding in the understanding of oocyte biology, these features have been used to characterize an oocyte’s ability to achieve competence. In addition, oocytes undergo intense gene transcription and protein translation to accumulate the maternal stores. When the oocyte is fully grown, most genes are transcriptionally inactive, and the chromatin is densely compacted. More recently, RNA profiling has been used to further define the transcriptional parameters that are associated with oocyte development. Here, focusing on cattle, we provide an overview of the experimental models commonly used to understand the underlying biology related to oocyte developmental competence. We compiled public data and showed that cattle oocytes can express over 15 000 protein-coding genes, suggesting a complex transcriptome landscape. Surprisingly, less than 2% of the expressed genes have been linked to developmental competence. The identification of the gene products that contribute to oocyte development, and understanding their biological function, are a vital component of our quest toward defining oocyte developmental competence at the molecular level.