bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling of a profile of blades of the water-wheel with energy return optimization
Authors: Panichkin A V 
Published: January 2020

Abstract
In work approach for numerical realization of definition of difficult borders with a current of a thin layer of ideal liquid on the surface of the working blade of the water-wheel is considered. The technique of creation of firm borders in two-dimensional and three-dimensional cases for streams of such layer of liquid with application of power optimization is presented. Test calculation of an optimum surface of blades of the water-wheel at the maximum return of kinetic and potential energy by liquid on the basis of use of the principle of a maximum was considered.
COMPUTING FUZZY INTEGRAL OF THE BASIS OF FUZZY MESURE
Authors: Primova H A , Sotvoldiyev D M , Raximov R T , Bobabekova X 
Published: January 2020

Abstract
The fuzzy integral of a function with a fuzzy measure is a general estimate in the form of a nonlinear convolution of particular estimates of information elements, and the possibility of interconnection of information elements is not excluded. Here is an approach that allows the expert to best formalize his fuzzy ideas, transforming the language of words into a language of quantitative estimates.
Non-linear mathematical model to predict the changes in underground water level and salt concentration
Authors: Ravshanov N , Daliev Sh 
Published: January 2020

Abstract
An urgent problem related to the process of change in underground water level and mineral salt transfer in soils is solved in the paper. The problem is described by a system of partial differential equations and the corresponding initial, internal and boundary conditions of various kinds. To derive a mathematical model of the process under consideration, a detailed review of scientific papers devoted to various aspects and software of the object of study is given. To conduct a comprehensive study of the process of filtration and change in salt regime of groundwater, mathematical models and an effective numerical algorithm are proposed taking into account external sources and evaporation. Since the process is described by a nonlinear system of partial differential equations, it is difficult to obtain an analytical solution. To solve it, a numerical algorithm based on a finite-difference scheme is developed, and an iterative scheme is used for nonlinear terms, the convergence of the iterative method is checked. In the conclusion of the paper it is shown that the developed mathematical apparatus can significantly reduce the volume of field experiments on monitoring and predicting the level of groundwater and salt concentration and minimize expensive and resource-intensive experimental work.
Equilibrium Shifts and Shocks in Dynamic Systems
Authors: Stanick N A , Kraynyukov N I 
Published: January 2020

Abstract
The article discusses a dynamic macroeconomic model used by monetary authorities to make decisions on the monetary policy, customizable using satellite models. Since this model is calibrated, it is necessary to evaluate the sensitivity of the model parameters. The parameters are estimated using the models of the transmission mechanism of monetary policy. Models are considered near the stationary hypersurface Ω. The Lyapunov function with the constraints obtained from satellite models was used to assess the sensitivity of the parameters of the dynamic macroeconomic model. The magnitude of innovative shocks determines the transition between stationary hypersurfaces of a dynamic system and structural changes in a dynamic model.
Simulation of vehicle collisions at an unregulated intersection based on the Monte Carlo method
Authors: Varnavsky A N , Rogulina A V 
Published: January 2020

Abstract
Currently advanced driver-assistance systems develop actively, which allow to signal to the driver about danger of collision of vehicles, necessary braking or changes of motion parameters of the car to prevent dangerous situations and accidents. The effectiveness of advanced driver-assistance systems from the parameters of their work. Therefore, the actual task is to set the optimal parameters of advanced driver-assistance systems. The values of such parameters in general can be both statistical and independent of the current road situation, and dynamic and depend on the current road situation. This problem cannot be solved without modeling dangerous situations, creating models of motion and collision risks, the results of which can be given recommendations for setting the parameters of the advanced driver-assistance systems. The aim of the work is statistical modeling collision vehicles on the unregulated crossroads and the evaluation dependency of probability collision from the parameters of the road situation. An analytical modeling of the movement of vehicles at the crossroads was used and a mathematical model of their collisions was built. With the help of statistical modeling a probability of their collision with different parameters road situation was rated. Received result can be used to configuration parameters management vehicle advanced driver-assistance systems, including dynamic.
Simulation of data distribution between server stations using fuzzy technologies
Authors: Vikulov E O , Denisov O V , Meshcheryakov V A , Denisova L A 
Published: January 2020

Abstract
This article is about development and modeling of data distribution system through the server stations. An algorithm for selecting a server for downloading data based on fuzzy logic is proposed. A simulation model of a server complex created by MATLAB / Simulink / SimEvents software is presented. This model allows us to study the server complex as a system with discrete states based on the theory of queuing systems. Numerical experiments on the distribution of data among servers using different algorithms for selecting a server for user loading data were carried out. The advantage of the proposed approach to server selection based on fuzzy inference is shown. This advantage is expressed in reducing the length of queues in the system and increasing the number of serviced requests for data processing by servers.
Effect of neodymium doping on microwave absorption property of barium hexaferrite in X-band
Authors: Goel Shivanshu , Garg Avesh , Gupta Raju Kumar , Dubey Ashish , Prasad N Eswara , Tyagi Sachin 
Published: January 2020

Abstract
M-type barium hexaferrite (BaFe12O19) particles are synthesized by using sol-gel auto-combustion reaction for microwave absorption study in X-band. Three different materials namely BaNd0.02Fe11.98O19 (Nd2), BaNd0.04Fe11.96O19 (Nd4) and BaNd0.06Fe11.94O19 (Nd6) have been developed by varying doping of neodymium in barium hexaferrite. The synthesis of particles has been confirmed using SEM micrographs and XRD diffraction pattern. The hysteresis study is carried out for saturation magnetization using vibrating sample magnetometer (VSM). As the doping concentration of neodymium increases, the saturation magnetization of the material is decreased from 47.272 emu g−1 to 16.479 emu g−1. The vector network analyzer (VNA) is used for complex permittivity and complex permeability measurements of the developed materials. Nd4 material shows highest values of permittivity and permeability losses among other developed materials. From the complex permittivity and complex permeability, the reflection loss results of the developed materials have been calculated. The maximum reflection loss of −33.17 dB was obtained for 2.2 mm pallet of BaNd0.04Fe11.96 and −10 dB bandwidth reaches 2.94 GHz.
Mangrove bark tannins as a Zn–P coating sealant for mild steel corrosion protection in 3.5% NaCl solution
Authors: Zainol Abidin Shahadad , Hussin M Hazwan 
Published: January 2020

AbstractIn this work, mangrove bark tannins have been studied as a sealant after Zn–P of mild steel. The efficiency of the sealant against the corrosion was tested by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation (PD) in 3.5% NaCl solution. The increased in the concentration of the tannin as a sealant increases the inhibition efficiency up to optimum concentration of 4 g l−1. The inhibition efficiencies of tannin methanol extract (TME) and 70% tannin acetone extract (TAE) were 83.52% and 71.12% respectively. The results obtained from EIS and PD were in a good agreement and complementary to each other. The double layer constant phase element capacitance (CPEdl) decrease indicated that a film form on the surface of the mild steel that retard the corrosion activities. Further, the pore modifications and elemental compositions were analyzed by scanning electron microscope (SEM) and energy dispersive x-ray (EDX).
First-principles study of the surface structure and stability of BC5
Authors: Li Cheng , Deng Kai , Li Jinxia , Sun Chunyan , Ma Pan , Chen Yanyan , Shi Xue-Rong 
Published: January 2020

Abstract
BC5 with both superhard and superconducting properties is expected to have important applications in many fields. In this work, the low-index surface structures and properties of BC5 have been identified by first-principles calculations. The surface stability decreased in the order of (011) > (010) > (101) > (100) > (110) > (111) > (001). The (011), (101), and (110) surfaces exhibit the strongest surface relaxation, followed by (111), and the (001) surface is the least. A DFT (density functional theory)-based Wulff construction of the equilibrium shape of BC5 shows that the surface with the largest exposure area is (011), followed by the (101) and (001) surfaces. Electronic analyses show that Pmma phase BC5 and all considered low-index surfaces exhibit metallic character where the surfaces are even stronger. Larger charge redistribution in the low-index surfaces is found compared with the bulk case.
Electrical properties and alkali-pathways simulation of new mixed conductor Na4Li0.62Co5.67Al0.71(AsO4)6
Authors: Marzouki Riadh 
Published: January 2020

Abstract
Polycrystalline sodium lithium-cobalt-aluminum arsenate, Na4Li0.62Co5.67Al0.71(AsO4)6, was synthesized by solid state reaction route and characterized by infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The title material is a member of β-Xenophyllite family which show 3D anionic framework with interconnecting tunnels where alkali-ion are located. Dense ceramic with relative density of 97% is obtained after planetary grinding of the synthesized powder followed by optimal sintering at 1113 K. The effect of grinding on microstructure of sample is controlled by Scanning Electron Microscope (SEM). The electrical study using impedance spectroscopy, in the 443–773 K temperature interval, show interesting electrical performance of the dense ceramic: σ
433K = 1.41 10–5 Scm−1 and the activation energy Ea = 0.449 eV. The alkali migration pathways in the anionic framework were simulated using Bond Valence Site Energy (BVSE) model to correlate structure with electrical properties of the studied material. The calculation results were compared to other β-Xenophyllite materials.
Increasing the silicon solar cell efficiency with transition metal oxide nano-thin films as anti-reflection coatings
Authors: Sagar Raghavendra , Rao Asha 
Published: January 2020

Abstract
Herein, we report the study on RF-sputtered transition metal oxide thin films of Zinc oxide, Magnesium oxide, and Aluminum oxide as an antireflection coating on silicon-based solar cells and their influence on energy conversion. The transmission spectrum of all sputtered metal oxides was studied using a UV-visible spectrophotometer. The phase formation and microstructure analysis of these sputtered oxides were studied using glass for the destructive test along with the device. The x-ray diffraction and cross-section scanning electron microscopy of sputtered glass confirmed a single-phase structure along with nearly equal desired deposition thickness. The thicknesses of sputtered films were estimated using variable angle ellipsometry and the same was confirmed from cross-section scanning electron micrograph. The chemical composition and oxidation state of thin films deposited on glass were established from x-ray photoemission spectroscopy. The ability of a fabricated device deposited with the antireflection layer in converting photon energy to electrical energy was studied using a solar simulator under 1 sun condition. The ability to collect charge carriers of the anti-reflection coated device as a function of wavelength was also studied using quantum efficiency measurement.
Analysis of transient and tertiary creep behavior of Titanium modified 14Cr-15Ni stainless steel after cold working
Authors: Yadav Hari Krishan , Ballal A R , Thawre M M , Vijayanand V D 
Published: January 2020

Abstract
Characteristic of transient and tertiary creep behavior of ten, twenty, thirty, and forty percent cold worked indigenously developed Titanium modified 14Cr-15Ni stainless steel at 700 °C and various stress levels have been assessed. Small primary creep region followed by secondary creep and then substantial tertiary creep regions were exhibited by all steels. Creep parameters like transient strain and rate of exhaustion of transient creep in Garofalo equation and tertiary strain and rate of acceleration of tertiary creep in modified Dobes and Cadek equation have been extensively studied. The relationships among exhaustion rate of transient creep, acceleration rate of tertiary creep, and minimum creep rate revealed the prevailing theory of first order reaction rate during transient and tertiary creep deformation of the Titanium modified 14Cr-15Ni stainless steel. The exhaustion rate of transient creep decreased, whereas tertiary creep parameter decreased as the amount of cold work increased. Creep damage tolerance parameter indicated that necking, precipitate coarsening, and recovery of substructures are dominant creep damage mechanisms in the Titanium modified 14Cr-15Ni stainless steel.
Thermal analysis, microstructure and performance of AA6063 aluminum alloy casting with Ag and Fe additions
Authors: Tash Mahmoud , Khalifa Waleed 
Published: January 2020

Abstract
This article aims to investigate the microstructure, mechanical properties, wear and corrosion resistance of the grain refined AA6063 Aluminum Alloy Casting with added Ag and Fe. Thermal analysis was used to evaluate the influence of Ag and Fe addition. Reactions are observed during the solidification due to the formation of the α-Al dendritic network, followed by the precipitation of the Al8Fe2Si, transformation of Al8Fe2Si into Al5FeSi and/or precipitation of Al5FeSi intermetallic, and finally, the precipitation of small dark particles Mg2Si. Microstructure was examined using optical microscopy, Image analysis and scanning electron microscopy. Hardness, tensile properties, wear and corrosion resistance were evaluated for the as-cast conditions. Line scans for Ag, Fe, Si, Cu and Al were obtained from the various as cast samples using Energy-dispersive x-ray spectroscopy (EDX) facilities. The results reveal that different intermetallic phases can be formed. These phases are rich in Si, Fe, Mg and Ag. Additionally, AA6063 aluminum alloy casting with added 0.7–0.85 wt% Ag and 0.25–0.95 wt% Fe showed high wear and corrosion resistance response respectively. The wear and corrosion resistance of the AA6063 aluminum alloys with added Ag and Fe resulted were remarkably improved especially at 0.7 wt% Ag addition.
Improved Recognition of Hematogones From Precursor B-Lymphoblastic Leukemia by a Single Tube Flow Cytometric Analysis
Authors: Don Michelle D , Lim Washington , Lo Amanda , Cox Brian , Huang Qin , Kitahara Sumire , Lopategui Jean , Alkan Serhan 
Published: January 2020

AbstractObjectivesTo improve diagnostic accuracy in differentiating hematogones from leukemic blasts in cases of precursor B-lymphoblastic leukemia/lymphoma (B-ALL), particularly those that are posttreatment or after bone marrow transplant, and to provide an algorithmic approach to this diagnostic challenge.MethodsA seven-color antibody panel including CD10, CD19, CD45, CD38, CD34, CD58, and CD81 was generated to assess the feasibility of a single tube panel and provide an algorithmic approach to distinguish hematogones from B-ALL. Fifty-three cases were analyzed, and results were correlated with histology and ancillary studies.ResultsThere was a significant difference in mean fluorescent intensity (MFI) for CD81 and CD58 when comparing hematogones and B-ALL populations (P &lt; .001). B-ALL cases had a mean (SD) MFI of 24.6 (27.5; range, 2-125) for CD81 and 135.6 (72.6; range, 48-328) for CD58. Hematogones cases had a mean (SD) MFI of 70.2 (19.2; range, 42-123) for CD81 and 38.8 (9.4; range, 23-58) for CD58.ConclusionsThe flow cytometry panel with the above markers and utilization of the proposed algorithmic approach provide differentiation of hematogones from B-ALL. This includes rare cases of hematogones and B-ALL overlap where additional ancillary studies are necessary.
Cross-Cultural Comparison of Rural Healthy Adults: Russian and American Groups
Authors: Melikyan Zarui A , Puente Antonio E , Agranovich Anna V 
Published: January 2020

AbstractObjectiveThe Russian-speaking population is among the largest European-born in the U.S., yet Russian-American cross-cultural research is scarce. Two studies compared neuropsychological test performance in Russian and American urban adults. However, rural populations of the two nations have never been compared. Cross-cultural neuropsychological differences in rural populations might present differently than in urban dwellers. The present study provides a cross-sectional comparison of neuropsychological test performance in Russian and American rural adults.MethodsNeuropsychological test performance of 51 American (67% female) and 52 Russian (60% female) healthy rural adults age 18–89 was compared using t-test with Bonferroni correction for education-adjusted z-scores for the following tests: Rey Complex Figure Test (RCFT), Rey Auditory Verbal Learning Test (RAVLT), Trail Making Test A and B (TMT A&B), Stroop Neuropsychological Screening Test, Benton Judgment of Line Orientation Test (JLO), Brief Visuospatial Memory Test-Revised (BVMT-R), Color Trails Test 1 and 2 (CTT 1&2), WMS-IV Logical Memory Test (LMT), WAIS-IV Digit Span Forward (DSF) and Backward Test (DSB), and Symbol Digit Modalities Test (SDMT).ResultsAge and sex distribution did not differ in the two groups, but the Russian group was more highly educated. The American group outperformed the Russian group on TMT B, CTT 2, recognition trials of RCFT, BVMT-R, LMT, and on DSF.ConclusionsCultural differences in attitudes to timed activities, experience with timed tests and multiple-choice format, attention to details, and length of digit-words that put differential demand on short-term memory in Russian and in English may mediate observed between-group differences.
Holocene changes in the distributions of Asian and European badgers (Carnivora: Mustelidae: Meles) inferred from ancient DNA analysis
Authors: Kinoshita Emi , Kosintsev Pavel A , Abramov Alexei V , Solovyev Vyacheslav A , Saveljev Alexander P , Nishita Yoshinori , Masuda Ryuichi 
Published: January 2020

AbstractAlthough the present-day distributional boundary between the European badger (Meles meles) and the Asian badger (Meles leucurus) is around the Volga River, studies of ancient bone remains have indicated changes in the distribution of M. meles and M. leucurus in the Urals–Volga region during the Holocene. To examine past changes in distribution using genetic data, changes in genetic diversity, and the relationships of Holocene to modern populations, we sequenced ~150 bp of the mitochondrial DNA control region from the 44 ancient badger remains excavated from European Russian, Ural and Western Siberian sites, and we detected 12 haplotypes. Our study revealed Holocene changes in the distributional boundary between these badger species. Meles meles inhabited the Ural Mountains east of the Volga River in the Early Holocene, whereas M. leucurus expanded its distribution westwards, starting ~2500 years ago. Thereafter, M. leucurus rapidly replaced M. meles in the region between the Urals and the Volga, resulting in the present-day boundary in the Volga–Kama region. Among the 12 haplotypes detected, three for M. leucurus and four for M. meles were identical to partial sequences of haplotypes detected in modern populations, indicating considerable genetic continuity between Holocene and modern populations.
Inactivation of TRP53, PTEN, RB1, and/or CDH1 in the ovarian surface epithelium induces ovarian cancer transformation and metastasis
Authors: Shi Mingxin , Whorton Allison E , Sekulovski Nikola , Paquet Marilène , MacLean James A , Song Yurong , Van Dyke Terry , Hayashi Kanako 
Published: January 2020

AbstractOvarian cancer (OvCa) remains the most common cause of death from gynecological malignancies. Genetically engineered mouse models have been used to study initiation, origin, progression, and/or mechanisms of OvCa. Based on the clinical features of OvCa, we examined a quadruple combination of pathway perturbations including PTEN, TRP53, RB1, and/or CDH1. To characterize the cancer-promoting events in the ovarian surface epithelium (OSE), Amhr2cre/+ mice were used to ablate floxed alleles of Pten, Trp53, and Cdh1, which were crossed with TgK19GT121 mice to inactivate RB1 in KRT19-expressing cells. Inactivation of PTEN, TRP53, and RB1 with or without CDH1 led to the development of type I low-grade OvCa with enlarged serous papillary carcinomas and some high-grade serous carcinomas (HGSCs) in older mice. Initiation of epithelial hyperplasia and micropapillary carcinoma started earlier at 1 month in the triple mutations of Trp53, Pten, and Rb1 mice as compared to 2 months in quadruple mutations of Trp53, Pten, Rb1, and Cdh1 mice, whereas both genotypes eventually developed enlarged proliferating tumors that invaded into the ovary at 3–4 months. Mice with triple and quadruple mutations developed HGSC and/or metastatic tumors, which disseminated into the peritoneal cavity at 4–6 months. In summary, inactivation of PTEN, TRP53, and RB1 initiates OvCa from the OSE. Additional ablation of CDH1 further increased persistence of tumor dissemination and ascites fluid accumulation enhancing peritoneal metastasis.