bluuebunny/crossref_metadata_2025_split huggingface dataset:
Exponential stability of the stationary solutions of the kinetic Carleman system
Authors: Dukhnovsky Sergey 
Published: January 2020

Abstract
In this article we discuss the kinetic system of Carleman equations. Research of technological processes for the production of building materials is based on autocatalysis reactions. The Carleman system is a special case of the discrete Boltzmann equation. In many problems of the kinetic theory of gases, gas dynamics, autocatalysis chemistry, and other fields of science and technology, Cauchy problems of hyperbolic equations arise that describe various processes. In the one-dimensional case, the system Carleman describes autocatalysis. A theorem on the stabilization of solutions of the Carleman system is formulated.
Visualization of the photoelastic method data in the angular zone of a region
Authors: Frishter L U 
Published: January 2020

Abstract
The experimental photoelastic method, which is a continuum method, and the method of forced deformations defrosting, allow us to obtain a stress-strain state in the stress concentration zone on the contact surface of composite structures with a surge of forced deformations on models made of optically-responsive material. The experimental solution is obtained on the model with an angular cut of the boundary, the vertex of which is occupied by the rupture of forced (temperature) deformations. The fringe contour obtained on the model by photoelastic method and the method of defrosting in the stress concentration area, in the zone of angular cut of the boundary and forced deformations surge, is characterized by significant gradients of experimental data: the order of fringes (isochromes), isoclines parameters, stresses, deformations. Modern methods of visualization of experimental data based on digital shooting expand the capabilities of the photoelastic method. The study purpose is to estimate the capabilities of using photoelastic method and the method of deformations defrosting to obtain the stress-state deformation in the angular zone of a region, which is as close as possible to the stress concentration area during digital shooting and data processing, by the standard methods of stress separation.
Structural scheme for the synthesis of stable motion of a walking drive using a self-oscillation control system
Authors: Polyanina A S 
Published: January 2020

Abstract
Walking robots are one of leading directions of scientific and technical developments. An important problem is the creation of control systems that ensure the stable motion of a walking drive along various types of trajectories. In work the structural scheme of a system that implements the controlled motion of the foot point of a walking robot using a self-oscillation generator is given. Modeling of periodic motion generators is based on the use of the second Lyapunov method.
The mathematical modeling as the basis for the method of the rapid evaluation of the resources for the building of the physical level of modern civil engineering facilities information system
Authors: Semenov A B 
Published: January 2020

Abstract
The author discusses the problem of information in the modern civil engineering facilities and proves the necessity for use of wire communication channels on physical level. The author demonstrates the insufficient accuracy of the existing methods for calculation of the cable consumption rate. To eliminate this drawback, it is suggested to apply mathematical modeling. The experimental data on real facilities parameters are given, the algorithm of a simple calculation is provided.
The methodology of storing the information model of building structures at various stages of the life cycle
Authors: Ginzburg A. , Shilov L. , Shilova L. 
Published: January 2020

Abstract
The paper presents an analysis of the current state of processing the results of laser scanning to build information models of construction objects at the operational stage.
The authors proposed a new methodology for combining project documentation and executive (as build) documentation (obtained via laser scanning procedure), presented an application of this methodology in the context of the entire life cycle of a construction project. The authors do not try to process point clouds (laser scanning results) and convert them into BIM objects (existing approach) but offer a methodology for working with raw data as BIM object.
Mathematical modeling of the building materials production processes
Authors: Vasil’eva Olga 
Published: January 2020

Abstract
We propose a new mathematical model of the process of production of building materials based on the reaction of autocatalysis. Discrete kinetic models can be used to mathematically describe this process with a different number of reagents. In the case of two reagents, the Carleman discrete kinetic system can be used to describe the autocatalysis reaction. The mathematical model proposed in this paper takes into account the terms of a higher order of smallness for a small parameter. The account of these terms allows to describe more correctly process. The numerical research of the proposed mathematical model is carried out. Numerical results are presented. The analysis and comparison of the obtained numerical results with the results of the numerical study of the kinetic system of the Carleman equations is carried out.
The deformability of shear bonds in the load-bearing systems of panel buildings
Authors: Lyublinskiy V A 
Published: January 2020

Abstract
Civil buildings, like construction objects, have a certain life cycle; building structures subjected to power influences lose their design bearing capacity and operational suitability over time. The service life of prefabricated buildings was oriented to 50 years. Nevertheless, most of these buildings are still in operation in Russia. The service life of the mass typical series of prefabricated panel buildings is coming to an end, which necessitates a reliable assessment of the stress-strain state of building structures. Analyzes the stress-strain state of the load-bearing systems of mass buildings with linear and nonlinear deformation of shear bond materials. A 9-story large-panel residential building, consisting of one section, was taken as the object of study. Introduction to the algorithm of nonlinear deformation of only one type of shear bond allows us to fix a noticeable difference in the stress-strain state of the vertical load-bearing structures of the building. The discrete-continuous mathematical model creates a methodological basis for researching other basic elements of the spatial bearing system of a multi-storey building and assessing their contribution to the redistribution of efforts.
Tools and examples of intelligent processing, visualization and interpretation of GEODATA
Authors: Taranchuk V 
Published: January 2020

Abstract
The article discusses the results of instrumental filling and usages of the integrated software complex designed for the preparation and testing of digital geological and geoecological models. Proposed methods of calculating the accuracy and confirming the reliability of the interpretation of the initial data are described. Examples of intelligent analysis of the results are given, the possibilities of obtaining and visualizing deviations are described.
Electric field driven transformations of orientational structure in chiral nematic systems with large flexoelectricity
Authors: Oskirko A D , Ul’yanov S V , Valkov A Yu 
Published: January 2020

Abstract
Transformation of the orientational structure in a plane-parallel cell of a cholesteric liquid crystal, was studied depending on the magnitude of the voltage applied to the boundary planes of the cell. The equilibrium configuration of the liquid crystal director field was found minimizing the free energy both analitically and numerically. We took into account the orientational elastic energy in the volume and at the cell boundaries, the energy of an inhomogeneous electric field, and the flexoelectric effect. Systems with large flexoelectric coefficient were studied in detail. It was found, that when small voltages are applied to the cell boundaries, a continuous Fredericks transition occurs first, and then, when certain characteristic voltage is achieved, a significant jump-like change in the orientational structure takes place, and this structure gradually changes with the further voltage increase. It is shown that various scenarios of transformation of the orientational structure can be implemented depending on the actual values of the set of material parameters of the system studied. The discovered ability to control the structure of a liquid crystal in a cell can find use in various technical devices.
Non-destructive determining of foundation pile length variability for reliability analysis
Authors: Rybak Jarosław 
Published: January 2020

Abstract
Contemporary design methods of foundation piles are more and more focused on sophisticated methods based on reliability analysis. Such methods, on different level of complicity, demand precise description of all data under study, not only by means of their average or characteristic values but, on higher levels of reliability analysis, standard deviations of basic variables, possible correlations and type of probability distribution. Most of the basic variables related to the ground were cautiously studied during last decades. The geometry of the pile itself (diameter and length) was usually assumed to be guaranteed and considered as non variable. The work tends to emphasize the role of pile length and present some examples of its non-destructive evaluation. Basic concepts of law strain integrity evaluation, elementary methods of reliability and sensibility analysis are presented and proceeded by results of excessive field testing programs. Some remarks on selection of basic random variables for pile capacity computation is given in discussion section. The results of the study confirm intuition that pile’s length variability plays a secondary role in reliability assessment of pile’s capacity.
Application of gabions for strengthening marine coastal slopes
Authors: Cherkasova Liudmila 
Published: January 2020

Abstract
The work considers the use of gravitational retaining walls made of gabion structures to strengthen the sea slopes. A wide range of possibilities for using gabions in construction is noted. An analysis of the technical and regulatory literature leads to the conclusion that the issue of using gabion structures to strengthen marine coastal slopes is not well understood. The paper describes the experience of using gabions to strengthen and protect against erosion of the sea slope from the moment of creation to complete destruction. A change in the state of the structure during long-term operation and their causes are recorded.
The Ultra-Small Armchair Boron Nitride Nanotubes Study Using a Density Functional Theory Method.
Authors: Jonuarti Riri , Yusfi Meqorry , Triati Dewi Kencana Wungu , Haryanto Freddy , Sprijadi  
Published: January 2020

Abstract
A density functional theory (DFT) method was used to study the structures, stability and band gaps of the ultra-small armchair boron nitride nanotubes (BNNTs). We define the ultra-small size of the armchair boron nitride nanotubes (BNNTs) as a nanotube with diameter less than 1 nm. Each armchair nanotube’s stability and band gap was obtained varied by varying the size of nanotube diameters up to 1 nm. The larger size of diameter the higher stability and wider armchair nanotubes band gap. The results of the ultra-small armchair calculation confirm the same trend of properties with the available calculation data of ultra-small zigzag boron nitride nanotubes (BNNTs).
Electropolymerization of Polyaniline Film as a Conductive Layer for the Electrodeposition of NiCo Alloy
Authors: Budi Setia , Ayuningsih Arum , Pratiwi Citra , Paristiowati Maria , Fadiran Riser , Sugihartono Iwan 
Published: January 2020

Abstract
Polyaniline films were synthesized using the electropolymerization method to produce a conductive layer as an electrode for metal electrodeposition. The layer was characterized using Fourier transform infrared (FTIR), X-ray diffractometry (XRD), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). According to the SEM micrograph, morphological characteristics of polyaniline films included cross-linking and crevices with 0.2 μm diameter. The electropolymerized films were successfully used as a substrate for NiCo alloy electrodeposition.
Analysis of natural rubber compounds with filler Of Oil Palm Empty Bunches Powder and Carbon Black
Authors: Ginting E M. , Bukit N. , Motlan  , Saragih M.T. , Frida E. , Bukit B. F. 
Published: January 2020

AbstractThe study aimed to determine the effect of the addition of carbon black (CB) and Palm Empty Bunch Powder (OPBEP) as a filler in natural rubber compounds on thermal and transmittance properties. The composting method is done at the Open mill. The process of mixing natural rubber with additives, curative agents, activators, accelerator materials and nano OPBEP and CB with variations (0;2; 4; 6; 8)% wt. The results of the study were obtained. FTIR results from coumpound with CB and OPBEP fillers as a whole showed almost the same results. This is due to modifications so there is a possibility of overlapping with uptake on other bands. There is a peak of 2912 C – H asymmetric symmetric stretching vibrations of octadecylamine, respectively. Bending vibration of C – H in the = CH group of 3,4- or 1,2-units. The thermal properties of the DSC thermogram obtained an increase in the melting point and cross-linking with an increase in the content of the OPBA element compared with no filler as well as the CB / filler. In general, a compound with OPBEP filler and CB can be used as a technical product that has more mechanical properties.
Au-Coated PDMS grating for SERS substrate: Comparison of two different grating depths
Authors: Ulum A H , Destarina L , Aminah N S , Srisuai N , Boonruang S , Nuntawong N , Horprathum M , Djamal M 
Published: January 2020

Abstract
Surface enhanced Raman scattering substrate was an alternative analytical tool with ultrahigh sensitivity and rapid response for chemistry, medicine and forensics science. In this work, the surface enhanced Raman scattering (SERS) substrate based on PDMS grating structure created by laser interference lithography using excimer laser modification and further 80 nm-thick Au thin film deposition by dc magnetron sputtering was proposed. We investigated the effect of the grating depth on SERS performance. The methylene blue solution of different concentration was employed to test the SERS performance using the portable Raman spectrometer. The optimal SERS performance can be optimized by fabricating the PDMS grating structure with 850 nm-period, 310 nm-depth and 0.5-filling factor.
The ICARE Practice Based on Worksheet and Physics Experimental to Improve Student Creativity
Authors: Sinuraya J , Wahyuni I , Panggabean D D 
Published: January 2020

Abstract
Creativity is one of the important elements in learning physics but is rarely studied to find out the effects of teaching applied to increasing creativity. The research is intended to describe the use of The ICARE Practice Based on Worksheet in increasing student creativity in the Physics Education Study Program. The course assessment formally uses The ICARE Practice Based on Worksheet and the Independent Torrance Test for creativity. At the beginning of the lesson given an explanation of work instructions followed by group organizing. The group used The ICARE Practice Based on Worksheet to conduct physics experiments with the guidance of lecturers. The experimental results of each group were presented by each group and continued with interactive debates between presenters and comparison groups. Input provided by lecturers and students is used to make reports individually. The Independent Torrance Test is given as a pretest and posttest. Increased creativity is an effect of applying The ICARE Practice Based on Worksheet in experimentation. The gain is based test results were obtained from the posttest and pretest ratings. The test results show that improvement through creativity indicators is achieved on Originality, Flexibility, and Elaboration. The indicator has an increase of more than 70 % of the number of students with N-Gain score is 0.38 in the medium category.
Regional Detection Polluted with Diffusion and Convection Models in Banten Province
Authors: Ruhiat Y , Guntara Y 
Published: January 2020

Abstract
Numerical convection and diffusion models can be used to predict air pollutant concentrations in an area. Changes in air pollutant concentration can be analyzed using diffusion equations which depend on the coefficient of intra-particle diffusivity (D). Whereas to find out the changes in air quality categories become polluted using a convection equation which depends on the diffusivity coefficient between particles (Γ). The combination of the two equations can be used to estimate the polluted areas of a region. The results of the climate analysis indicate that Banten Province if viewed from the direction of the wind, is very potential for the development of increased fish production. Meanwhile, if viewed from the temperature and rainfall of Banten Province the potential for agriculture. However, considering that in the western part of the region there is a large industry with a chimney height of 275 meters, so based on atmospheric stability, the distribution of air pollutants spread far outside the industrial area. This will have implications for other regions so that at high concentrations (with diffusion equations) it will change the air quality (with the convection equation) so that in certain regions and at certain times it will become a polluted area.
Android-Based Physics Learning-Media Apps for High School Students
Authors: Wirjawan J V D , Herwinarso  , Untung G B , Pratidhina E , Wijaya A , Pambayun B , Pratama D , Rombe C M , Putri K A S , Yuliani F R 
Published: January 2020

Abstract
The use of Android smartphones has been emerging quite fast. It distracts most of the students’ attention from their studies. While at one side, it brings some negative impacts on students, on the other hand, it opens some opportunity to use the students’ deep engagement with Android smartphones as a source of excitement to promote physics learning-media. We have conducted research in Surabaya (Indonesia) and its vicinity to address the use of Android smartphones as student physics learning source. Applying the 4-D model, we have developed Android mobile-apps based physics learning-media on several topics of introductory high school physics. The physics learning-media have been tried out by several groups of students and have received positive comments from the users.
Analysis of The Bahal Temple III Site Using Combination Method of Geophysics
Authors: Juliani Rita , Rahmtasyah  , Muhammad Syukri Surbakti , Sianturi Astina 
Published: January 2020

Abstract
The Bahal III temple is an ancient relics temple of the Hindu Kingdom. The research aims to know the underlayer structure of the Bahal III surface and to determine the minerals contents of the boulder sample in the Bahal III temple in the Portibi region, North Padang Lawas. The research methods are Geoelectric and geomagnetic, and XRD methods. The geoelectric method that used in this research was the Wenner-Schlumberger method in two lines. Line length is 155m with 32 electrodes and 5m distance each. The geomagnetic method was done by using 60 grids. Geoelectricity data processing used Res2Dinvand software while geomagnetic data processing used Mag2DC software. Data processing of layer contouring used surfer11 software. Data processing of the XRD test result used Match3 software. The findings showed that the andesite rock layer was found by using the geoelectric method with resistivity value 950 - 1500 Ωm suspected as the rock of temple forming in-depth 3-12m. Geomagnetic test results showed the susceptibility value 0.034(cgs unit) which is andesite rock. XRD test result for minerals contents of the temple boulder sample was dominated by mineral Silicon dioxide (SiO2) 88.8%, Ferric oxide (Fe2O3) 8.9 %, Magnesium oxide (MgO) 1.7% and Titanium dioxide (TiO2) 0.7 %.
Electrodeposition of Zn-doped Cu2O for the Photodegradation of Methylene Blue
Authors: Akhirudin I , Budi S , Yusmaniar  
Published: January 2020

Abstract
Copper oxide (Cu2O) is a well-known semiconductor that is potentially used as a photocatalytic material for the photodegradation of synthetic dyes. In this study, Zn-doped Cu2O was synthesized by electrodeposition, and its performance for the photodegradation of a methylene blue (MB) solution was investigated. Electrodeposition was carried out in a sulfate solution at solution pH values of 4 and 5. Hexagonal and pentagonal particle deposits were formed in the solutions at pH values of 4 and 5, respectively. The deposits were composed of Cu2O and Cu phases, and a high Cu2O phase composition was obtained at pH 4. Photodegradation results revealed that 63.23% and 46.49% of MB are successfully decomposed by electrodeposited Zn-doped Cu2O at pH 4 and 5, respectively. This result indicated that the photocatalytic activity of electrodeposited Zn-doped Cu2O at pH 4 is higher than that at pH 5.
The effect of post annealing time on structural and optical properties of ZnO thin films by sol-gel spin coating method
Authors: Motlan  , Siregar Nurdin , Panggabean Johnny 
Published: January 2020

Abstract
ZnO thin fim has been synthesized by sol-gel spin coating method. The materials used were zinc acetate dehydrate as a basic material, isopropanol as a solution and diethanolamine as a stabilizer. The ZnO thin films were grown on FTO conductive glass substrate and post annealed at 500°C with annealed time consecutively 30, 60, 90, 120 and 150 minutes. The XRD results show that the crystal structure is wurtize hexagonal with size of 22 nm for 30 minute annealing time. The SEM results show a uniform homogeny round granules. UV-Vis measurements show a sharp transmission values and the decrease in their absorbance for all samples in the range of 310 to 430 nm wavelength. The band gaps are within 3.073 -3.140 eV.
Decrease Expression of Tumor Necrosis Factor - Alpha (TNF - α) and Sperm Count Increase in Type 1 Diabetes Mellitus Rat (Rattus norvegicus) Model with Turmeric Rhizome (Curcuma longa L) Extract
Authors: Pratiwi H , Sabirosi B G , Winarso D 
Published: January 2020

Abstract
Diabetes mellitus type 1 (DM type 1) is a type of diabetes caused by pancreatic β cells damaged which producing insulin. Animal DM Type 1 caused inflammation of the pancreas and its impact on the male reproductive organs may decrease the quality and quantity of sperm. This research was aimed to determine the effect of turmeric rhizome ethanol extract (Curcuma longa L.) based on sperm count and expression of tumor necrosis factor-alpha (TNF-α) in the pancreas organ. This experiment was designed by Completely Randomized Design. Induction of DM Type 1 in rats was conducted by injecting Multiple Low Dosage - Streptozotocin (MLD-STZ) intraperitoneally (i.p) at the dosage of 20 mg/Kg BW for 5 days. This study used male rats (Rattus norvegicus) aged 3 months Wistar strain which divided into 5 groups: negative control (A), DM Type 1 (B), DM Type 1 treated with turmeric rhizome Extract 1,2 g/kg BW (C), 1,8 g/kg BW (D) and 2,7 g/kg BW (E) for 42 days. Each group consisted of 4 rats. spermatozoa counted with hemocytometer and measurement of TNF-α expression used immunohistochemical methods. The result of the analysis on one way ANOVA (α = 0,05) data showed that spermatozoa count was significantly increased and TNF-α expression was decreased in rats which treated with turmeric rhizome ethanol extract 2,7 g/kg BW. This result indicates that turmeric rhizome extract may increase the number of spermatozoa and decrease the expression of TNF-α of DM Type 1 rats.