bluuebunny/crossref_metadata_2025_split huggingface dataset:
Lasers application for processing of waste products of textile and clothing industry
Authors: Ershova E S , Martynenko Yu V 
Published: June 2020

Abstract
This article identifies the need for active implementation and application of waste-free and low-cost industries and substantiates the need for active implementation of the latest technologies for processing light industry waste. The article discusses the possibilities of using laser machines in the process of processing textile materials from synthetic and artificial fibers and the artistic processing of waste products from the textile and clothing industry.
Frank constants calculation method for erbium-based liquid crystal
Authors: Tambovtcev I , Aksenova E , Dobrun L , Kovshik A , Ryumtsev E 
Published: June 2020

Abstract
The orienting effect of a magnetic field on an erbium-based liquid crystal complex was studied by a capacitance method. The dependence of the effective dielectric permittivities of the complex on the magnetic field is obtained. A theoretical approach and a numerical method for determining the Frank elastic constants are proposed based on the experimental dependence of the effective values of the permittivity on various magnetic fields.
Comparison of organic – inorganic nano-compositions created by different deformation – chemical techniques
Authors: Tsebruk I S , Pokidov A P , Kedrov V V , Klassen N V 
Published: June 2020

Abstract
Comparative studies of compositions from polystyrene and inorganic crystals of cesium sulfate and cesium iodide obtained by different methods gave new experimental facts and versions about particularities of structures and properties of these materials. The methods of creation of these compositions were based on two deformation – chemical techniques: solidification of micro-fibers from solutions of polystyrene with cesium sulfate and cesium iodide particles and introduction of polystyrene as the doping substance into single crystals of cesium iodide and potassium chloride by means of a ball rolling. In both cases micro- and nanosize singularities of the mass transfer were observed during the forming of these compositions. The microfibers formed by solidification of doped solutions of polystyrene turned out to be split to sets of nano – filaments. In the process of the dynamical centrifuging they formed the bundles parallel to the axis of the fiber, whereas the slow pulling of the fibers from the solution with a thin glass stick created saw-like chains of short pieces of the nano-filaments going along the axis of the fiber. These geometries were regulated by the ratios of compressive and tensile internal stresses, the chemical content of the components, lengths of the polystyrene molecules, viscosity of the solution. Superfast and superdeep mass transfer in the form of nano- and micro-filaments observed in our experiments is attributed to the soliton-like propagation provided by non-linear changes of the properties of the matrix in the vicinity of the filament. Hence wide sets of various nanostructures required by new trends of electronics, optics, etc. can be prepared by rather economic techniques.
Molecular dynamics parameters of liquid crystal mixtures with different chemical structures
Authors: Kucherov R N , Kurilov A D , Savin A V , Vasilyeva I A , Kuzmin M K , Chausov D N 
Published: June 2020

Abstract
Results of molecular parameters studies using methods of dielectric spectroscopy, acoustic spectroscopy and viscometry are compared. An influence of dipole-dipole interactions on the relaxation time, the coefficients of molecular friction and rotational diffusion of molecules has been established. An analysis of modern methods for determining the coefficient of molecular friction and rotational diffusion for liquid crystal mixtures of different composition is carried out. It is shown that currently there is no theory that can describe qualitatively and quantitatively the behavior of the molecular relaxation parameters of the liquid crystal mixtures.
Evaluation of channel transmission of nanoelectronic devices on low-dimensional structures with quantum confinement
Authors: Shashurin V D , Vetrova N A , Filyaev A A 
Published: June 2020

Abstract
A methodology has been developed for evaluation the channel transmission of nanoelectronic devices on low-dimensional 2D structures with quantum confinement and transverse current transfer. The advantage of the developed methodology is to ensure the numerical stability and increased speed of the computational model of channel transmission with a different number of heterostructure layers, which allows optimizing the calculation of the current-voltage characteristics of nanoelectronic devices and predicting their electrical parameters.
Evaluation of the efficiency of heat storage by a solid-state electric thermal storage
Authors: Khimenko A , Prantsuz O , Glebova I , Ponomarev A 
Published: June 2020

Abstract
Calculated and experimental studies of thermal processes and the efficiency of heat storage of solid thermal storage materials in an electric thermal storage (ETS) were carried out. Changes in the thermo physical properties of selected thermal storage materials depending on temperature are analyzed. The specific heat storage capacity in the temperature range from 50 °C to 650 °C of such materials as magnesite, chamotte, dinas, corundum was estimated. The research was carried out on an electric thermal storage with an electric power of 2.4 kW with heat storage elements made of magnesite. The temperature distribution is obtained in the heat storage element, as well as in the wall of the air channels of the heat storage elements. Measurements of the temperature of the heated air in the channels of heat storage elements and at the exit from the ETS were carried out. Temperature measurements were carried out with chromel-alumel thermocouples in a ceramic shell and chromel-kopel in a heat-resistant fabric cover. As a result of experimental studies, the temperature distribution in the heat storage elements of ETS is obtained. Based on these data it was calculated the amount of stored heat by heat storage elements of ETS for the complete cycle of its operation.
Laser based spectrophotometer for real-time monitoring of carbon monoxide production and utilization by plants
Authors: Stepanov E V , Kasoev S G , Zavalishin I V 
Published: June 2020

Abstract
A carbon monoxide analyzer based on tunable diode lasers was developed and used to study CO in the microcosm of some plants. Designed analyzer has high sensitivity (at the level of 5 ppb) and close to 100% selectivity to water vapors and CO2 and allows real-time online monitoring of CO in plants microcosm. In our in-vitro experiment the CO formation and release into the surrounding atmosphere were observed in the early stages of plant development (stage of germination and growth of seedlings wheat, cucumbers and colza). An intense CO absorption from the surrounding air was observed when studying the CO content in the microcosm of the formed plants.
The best absorption lines for the detection of carbon monoxide at 2.35 micron with tunable diode lasers
Authors: Stepanov E V , Kotelnikov S N , Stavtsev A Y , Kasoev S G 
Published: June 2020

Abstract
A modeling of high-resolution absorption spectra of carbon monoxide (CO) and other interfering gases at 2.35 um was conducted. Several CO absorption lines have been determined as the best for the use in laser based spectral analysis of CO under conditions of high humidity and high concentrations of CO2 in complex gas mixtures. Measurements of resonance absorption in these lines allow one to obtain maximum sensitivity and selectivity of CO analysis in the near-infrared spectral region.
Hypersonic approximation for distribution function of pairs of molecules in shock wave
Authors: Kuznetsov M M , Kuleshova Y D , Perov A A , Smotrova L V 
Published: June 2020

Abstract
New results of an analytical study of translational nonequilibrium in a shock wave are presented that are associated with the use of the exact expression for the longitudinal kinetic temperature Tx
in a simple gas. It is shown that the relative magnitude of the overshoot effect for the distribution function of the pairs of molecules inside the shock front satisfies the principle of independence from the Mach number. Asymptotically exact expressions are obtained for the effect of high-speed overshoot of the pair distribution function: “light” -“heavy” component.
Mathematical modeling of heat and mass transfer processes in the graphite thermal unit of the crystallization apparatus for Horizontal directional solidification method
Authors: Yusim V A , Sarkisov S E , Ryabchenkov V V , Kloss Yu Yu , Govorun I V , Ivanova L V , Sakmarov A V 
Published: June 2020

Abstract
The design of ECU has been created, which allows in the process of growing halide crystals to create in the growth and annealing zones, respectively, the high-gradient and low-gradient temperature regions necessary for each of the processes. The mathematical study of the influence of the processes of hydrodynamics, heat and mass transfer inside ECU, between ECU and the crystallization apparatus, is considered. For numerical calculations, the Navier-Stokes equation, the Menter differential k-ω turbulence model SST, the modified Stefan-Boltzmann law, the Fourier law are used. To describe the mechanism of heat transfer and heat conduction in solids, boundary conditions of the third kind were set. The distribution of the axial temperature gradient inside the carbon-graphite heat unit was studied. The mode of flow of the refrigerant inside the cooling jacket was determined. The radiative heat transfer between the surfaces, and the mechanisms of heat transfer and heat conduction in solids were studied.
Simulation of non-equilibrium gas kinetic processes in the multitube Knudsen pump on the basis of the Boltzmann equation
Authors: Yu Yu Kloss , Tcheremissine F G , Shirkin M Yu , Govorun I V , Shirokovskaya Yu V 
Published: June 2020

Abstract
A periodic system of multitube micropumps with pumping down based on the Knudsen effect is simulated in this work. The simulation is performed on an unstructured mesh. The Boltzmann equation is solved, and the advection and relaxation processes are simulated separately. The differential equation for advection is approximated with the first-order discrete difference scheme, and the collision integral is calculated with the projection method. The dependences of pump-down on the Knudsen number and temperature gradient were obtained from supercomputer computations. Data on the pumping rate were also obtained.
Physicist and teacher K. D. Kraevich and his work for national education development in post-reform Russia
Authors: Kondrateva G V , Parenkina V I , Uvarova N I 
Published: June 2020

Abstract
The article highlights the input of physicist and teacher K.D. Kraevich in the Physics education development in schools of post-reform Russia. It was during this time that the basis for modern Physics teaching was laid out. During this time a lot of physicists and academicians got their education, who then went on to make great discoveries in the XXth century. The article also highlights the importance of the works by K.D. Kraevich for contemporary teaching experience.
On the Coefficients of Quasi-Convex Functions
Authors: Altıntaş Osman , Aydoğan Melike 
Published: June 2020

Abstract
In this paper we introduce and investigate the class of T (λ, β, A, B) that we call the class of quasi-starlike and quasi-convex functions with respect to the values of the parameter λ. Also we define the class K (λ, β, µ, m, A, B) which is satisfy non-homogeneous Cauchy-Euler differential equation. We obtain coefficient bounds for the functions belonging the above classes.
Collective Behavior of Social Foraging Swarm with Disturbance
Authors: Miswanto  , Pranoto Iwan , Muhammad Hari 
Published: June 2020

Abstract
In this paper, a multi-agent system that models Social Foraging Swarm with Disturbance is proposed. The model is an extension of the model proposed by Wang et al., in which disturbance is introduced to the system. Under conditions on the size of the disturbance, it was shown that the new system was similar to the behavior of conventional models. The first similar behavior is stationarity by the swarm center. Here to obtain this result a notion of ρ-annulus will be introduced. The second similar behavior will also be presented in this paper that the agents aggregate and enter a certain ρ-annulus. The radius of the ball when the agents entering ρ-annulus will also be calculated. Numerical simulation demonstrate that the agents aggregate and enter a certain ρ-annulus around the swarm center.
Dynamics of Two Preys – One Predator System with Competition between Preys
Authors: Savitri Dian , Suryanto Agus , Kusumawinahyu Wuryansari M. , Abadi  
Published: June 2020

Abstract
We study the dynamics of two preys – one predator interaction with competition between prey populations. The proposed model is developed from the Lotka-Volterra predator-prey model. We first discuss some fundamental issues such as equilibrium points and the stability of each equilibrium point. The analysis shows that there are seven equilibrium points and some of them are conditionally locally asymptotically stable. The dynamical behavior of the proposed model is then verified numerically. We also observe numerically the occurrence of bistability, as well as a Hopf bifurcation which is driven by the conversion rate of predation into the predator growth rate.
Analysis of grouping ABC – VED and predicting the number of requests
Authors: Andawaningtyas Kwardiniya , Karim Corina 
Published: June 2020

Abstract
Market competition is required for company to optimize the management, which are appropriate, effective and efficient, since it is used for a company to satisfy a demand. ABC analysis is used for sorting some items which is dominating in sales based on investment value. Meanwhile, VED analysis aims to classify commodity based on the level of importance of store owner’s sales. The result of classification using ABC – VED analysis is a matrix that differentiates into three categories, namely category I is composed of AV, AE, AD, BV and CV; category II consists of BE, CE, and BD; and the third category consists of CD. The results of the ABC-VED analysis are then predicted the number of requests for commodity with the Double Exponential Smoothing method from Brown. This forecasting method is used when the data indicate a trend. Trend is a smoothed estimate of average growth at the end of each period. Forecasting results are expected to help plan inventory for the coming year at TB. Bina Usaha Temanggung Indonesia to prioritize sales.
Innovative Method to Evaluate Halal Assurance System (HAS 23000) Audit Results using Single Value Neutrosophic Number
Authors: Feri  
Published: June 2020

Abstract
The Halal food industry in Indonesia has became an alternative and trend in the global market. The quality management system plays a role in maintaining company consistency in implementing a quality management system which continue to develop in the food industry such as the Halal Assurance System (HAS 23000) LPPOM MUI. Internal audit is a part of the verification tools carries out internally by the company to meet the eleven criteria such as procedures, work instructions and documentation has been implemented with consistency and integrity. However, there are many problems in assessing consistency and integrity, among others, expertise auditor factor and also the auditor’s assessment as a human being tends to be doubtful related to standard interpretation, using a general impression in his assessment, incorrectly determining the classification/grading of findings, so the audit results has not produced a quantitative assessment. The research aims to use of the Neutrosophic Quality Audit (NQA) model. The proposed model uses Single Value Neutrosophic Numbers (SVNN). Simplified Neutrosophic Weighted Geometric Average Operator (SNWGAO) and cosine similarity degree. The result an innovative model will be reliable solution in improving the halal assurance system audit in the food industry. An illustrative example is provided to validate the proposed model.
Dynamical Analysis of a Rotavirus Infection Model with Vaccination and Saturation Incidence Rate
Authors: Ilmi Noraniza Bahrotul , Darti Isnani , Suryanto Agus 
Published: June 2020

Abstract
In this paper, we present and analyze a SVIR epidemic mathematical model for rotavirus infection with vaccination and saturated incidence rate. Dynamical analysis of this model is done by determining the equilibrium point and stability of the equibrilium point. The model exhibits two equilibrium points, i.e. disease free and endemic equilibrium. The basic reproduction number Rv
and R
0 has been obtained. The stability of the disease free and endemic equilibrium exists when the basic reproduction number less or greater than unity, respectively. Analytical result shows that those equilibrium points are locally asymptotically stable under certain condition. It is proved that the disease free equilibrium is globally stable when the value of basic reproduction number Rv
< 1 and R
0 < 1, respectively. Numerical simulations are presented to support and complement the theoretical results.
Long-term forest health implications of roadlessness
Authors: Healey Sean P 
Published: June 2020

Abstract
The 2001 Forest Service Roadless Rule prohibits roadbuilding in forests across an area equivalent to the combined states of New York and Maine (236 000 km2). There have been recent assertions that roads are needed to prevent fire and to keep forests healthy. Despite twenty years of ongoing forest health monitoring and the unique scope and ecological significance of this network of roadless areas, there has to date been no integrated assessment of the relationship between roads and forest health. Here, this question was addressed by synthesizing different sources of nationally consistent, longitudinal monitoring data. Agency management records show that a lack of roads has not stopped fire prevention measures; fuel management activities in roadless areas have actually been more numerous on a per-square kilometer basis than elsewhere in the National Forest System, although activities in areas with roads cover larger areas. Historical fire maps indicate that forests with and without roads have burned at similar rates since the Rule took effect. The apparent neutrality of roads with respect to fire occurrence may be due to higher rates of human caused ignition near roads offsetting advantages related to more agile positioning of fire-fighting assets. Beyond the fire dimension of forest health, analysis of over 15 000 inventory plots showed that while tree root disease is only weakly correlated with proximity to roads, roads are strongly associated with the spread of invasive plant species in national forests. Non-native plants are twice as common within 152 meters (500 feet) of a road as farther away. Speculation that eliminating road prohibitions would improve forest health is not supported by nearly twenty years of monitoring data.
Fabrication and magnetic properties of Co based thin films synthesized by physical vapor deposition under vacuum
Authors: Kharmouche A 
Published: June 2020

Abstract
We used thermal heating process, under a pressure of 10−7 mbar, to fabricate thin films of cobalt on monocrystalline silicon Si (100) substrates. The incident beam strikes the substrates under normal and oblique incidences within a home-made evaporation chamber. The thickness of the deposited films ranges from 18 to 400 nm. Microscopic characterizations of the films are performed with X-ray diffraction (XRD) measurements and infer that all the samples are polycrystalline, with an hexagonal close packed (h.c.p.) structure and exhibit a <0001> preferred orientation, for the perpendicularly evaporated films. The grain size is found to increase with the thickness of the magnetic layer. The values of the computed parameters allow concluding to a compressive stress for the thinnest films. The static magnetic properties have been performed by means of magnetic force microscopy (M.F.M.) and Alternating Gradient Field Magnetometer (A.G.F.M.) tools. The dynamic magnetic properties have been investigated using Brillouin Light Scattering (B.L.S.) measurements. The M.F.M. observations were performed after in-plane ac demagnetization, and stripe patterns are only observed for the thickest films, showing the weaker perpendicular anisotropies. We used the experimental results provided by these tools to compute the effective magnetic anisotropy factors Ku
. Values of Ku
anisotropy constants, higher than 13 × 106 erg.cm−3, have been found.
Photocatalytic activity of transition metals (Mn, Fe, Ag and Ni doped ZnO) nanomaterials synthesised via sol-gel method: Active sites over band gap
Authors: Darman A K A , Ibrahim M L , Rafaie H A , Mastuli M S , Kasim M F 
Published: June 2020

Abstract
Dopants with varied stoichiometry values were examined to determine their performances on photocatalysis. The sol-gel method was successfully synthesised using transition metals, namely manganese (Mn), Iron (Fe), silver (Ag) and nickel (Ni), as dopants in ZnO nanostructure. Zn(1-x)Mn(x)O, Zn(1-x)Fe(x)O, Zn(1-x)Ag(x)O and Zn(1-x)Ni(x)O (x=10%) were characterised by using X-ray diffraction (XRD), BET surface area analysis, temperature-programmed desorption of carbon dioxide (TPD–CO2) and UV-Vis spectrophotometer. A phase study on Mn- and Fe-doped ZnO nanoparticles confirmed that both the dopants experienced exceptional crystallinity with single-phase but Ag- and Ni- produced a multi-phases structures. Active sites of catalyst is proven to be an additional factor contributing towards photocatalysis in this work besides band gap and surface area. Temperature-programmed desorption of carbon dioxide (TPD–CO2) showed that the incorporation of Ag into ZnO lattice has enhanced the number of active sites on the surface of the catalyst whereas incorporation of Mn, Fe and Ni in ZnO has reduced it as compared to pure ZnO. Photocatalytic degradation of methyl orange for all stoichiometry of Ag-doped ZnO nanoparticles resulted in lower degradation time. Interestingly, 10% of Ag-doped ZnO achieved the highest degradation rate as much as 97.47 % at 160 minutes, hence emerging as the best amongst all other compositions.
The optimisation of fabrication process for various chemically treated kenaf fibres in epoxy matrix composites
Authors: Ghaztar M M M , Ibrahim N N I N , Zakaria S , Romli A Z 
Published: June 2020

Abstract
The fabrication process is crucial since it determines the overall performance of the bio-composites. This study draws from the drawbacks of the natural fibre reinforced composites that are high voids content, low in surface interaction as well as low-stress distribution property especially using a simple mould-press process. The study explores the correlation between various fabrication processes of thermoset matrix towards the composites density, voids content, tensile and morphological properties. The study was carried out by mould pressed only 10 percent (%) filled composites by varying its curing temperatures, moulds type, fibres size and fibres chemical treatments afflicted. The results showed that 50 ˚C of curing temperature, in plunger mould-type, using 0.25 mm mesh size fibre are the optimised parameters. The coated 1:6 composite showing the optimum properties since it improves 6.5% density, 99.95% voids content, 38.1% water uptake and 33.2-50.6% of tensile properties. The suitable processing parameters and high coating penetration might contribute to the total improvement of the coated fibre composites properties. Since it influences the fibres compact-ability that leads to low voids formation as analysed on its fractured surfaces. In summary, a better understanding of the materials characteristic and fabrication processes are needed to obtain the optimum bio-composites performance.