bluuebunny/crossref_metadata_2025_split huggingface dataset:
Providing different type of bracing in the existing building structure under seismic load
Authors: Rohman R K , Cahyono S D , Fatmawati L 
Published: November 2019

Abstract
This paper presented the influence of the providing different types of the bracing system in the existing building structure. The selected object of analysis is Timbul Jaya Plaza building that located in Madiun City Indonesia. The system of building structure is Moment Resisting Frame (MRF). Seismic loading analysis use equivalent static analysis base on SNI 1726 2012. Modelling and analysis of structure use computer software ETABS version 9.00. Aim of this research to compare the use of different types of the bracing system under seismic load. Type of bracing that analyzed is X-bracing, V-bracing, and Inverted V-bracing. Model of structure without bracing used as control. Result analysis known that the providing of X-bracing will decrease maximum displacement until 36.28 % compared with existing structure without bracing and increase the stiffness of structure.
Investigation of resistivity for delineation aquifer layers and subsurface structures
Authors: Jufriadi A , Ayu H D 
Published: November 2019

AbstractDelineation of aquifer layers and subsurface structures using investigation of resistivity was accomplished. The results of geoelectric resistivity investigations was described of the detailed subsurface structures conditions and clear aquifer layers. The resistivity geoelectric and well logging methods were used in this study because both of these methods give correct and efficient results, due to the strong correlation between the resistivity values of rock layers and the subsurface structure conditions. Result of investigations show research areas have potential aquifers with wide-spread. The potential of aquifers consists of surface aquifers and deep aquifers, with surface aquifers at a depth of 41 to 50 meters with resistivity values of 30.5-145 ohm-meters, and deep aquifers at depths between 140 to 170 meters with a resistivity of 14.7-46.8 ohm-meter. While the subsurface structure was dominated by clay, sandy clay, sand.
Resonant-frequency properties of low-dimensional junction of semiconductor-metal-semiconductor and calculation methodology
Authors: Valiukhov D P , Baklanov I S , Shtab E V , Shtab A V , Pigulev R V , Iliasov A S 
Published: November 2019

Abstract
The article describes frequency characteristics of semiconductor–metal–semiconductor Si–Ag–Si structures (ohmic contacts) having metal nanolayers as well as features of resonance phenomenon and sandwich structure energy interaction. Mathematical simulation of mentioned above processes is provided. The limiting factor for resonance process is determined. It is found that the resonance frequency is a subject of semiconductor-metal junction parameters while metal layer thickness impact is minor.
Evaluation of the traction-chain properties of a wheel tractor in dry peat deposit
Authors: Basalay G A , Kremcheev E A , Nagornov D O 
Published: November 2019

Abstract
The paper highlights the results of studies on the creation of a measuring complex suitable for experimental studies of the towing and coupling and dynamic properties of wheeled tractors operated in difficult geological conditions of peat deposits of various degrees of drainage. The conceptual solutions for the layout of the measuring complex, which allows carrying out field measurements of the kinematic and dynamic parameters of machine-tractor units, to measure the hook force and torque on the power take-off shaft, are presented. Solutions are proposed to support the testing process with auxiliary devices that create hook loads on tractors. The requirements for the organization of a technological site for conducting traction tests of wheeled tractors are given. As a result of the research work, a test procedure was developed; the issues of metrological support of research and processing of experimental data were resolved.
Nature-like equipment for backfilling the mine chambers to reduce the risks of technogenic seismic impact
Authors: Vasilyeva M A , Bochkov V S 
Published: November 2019

Abstract
The priority task in the mineral industry is to increase the efficiency of the exploited and infrastructure, equipment, including the creation of transport systems that have high performance while reducing the cost of transporting mineral raw materials and products of its processing. One-third of the world’s mining companies use their mining systems at their enterprises to create a space. Backfilling activities are carried out in order to improve the safety of mining operations, namely, to control mining pressure, reduce possible mineral losses during excavation, prevent the occurrence of underground fires, as well as sudden outbursts of coal and gas, protect against destruction of objects in residential areas. Particular attention should be paid to the use of hydro-folding as a measure to prevent technogenic-tectonic earthquakes during long-term and continuous development of deposits. Taking into account the peculiarities of the materials used as a base when preparing filling mixtures, the specificity of the process of moving them to the bookmark site, necessary for obtaining a backfill array of required characteristics, is becoming increasingly important to use fundamentally new transport technologies for filling mixtures.
Determination of main parameters of clay grinder
Authors: Dubinin N N , Mikhailichenko S A , Goncharov S I , Uralskaya L S 
Published: November 2019

Abstract
The article presents the main technological and power parameters of the clay grinder which depend on a number of geometric parameters, and various rheological characteristics of the processed material made it possible to derive pressure dependencies based on the flow of ductile masses which will allow designing such machines with rational geometric and kinematic parameters.
Methods for controlling the vibration state of technical facilities
Authors: Karlina A I , Gozbenko V E , Kargapol’tsev S K , Karlina Yu I 
Published: November 2019

Abstract
The article considers the features of the dynamics of systems with several degrees of freedom with the introduction of additional constraints. As an example, the authors consider the computational scheme of a locomotive traction engine with an axial overhung support. Different cases of the combination of perturbations were analyzed and the conditions for dynamic damping were determined. The specificity of the tasks to be solved was in the necessity to determine the conditions while choosing system parameters that would minimize the occurrence of cross-couplings. These conditions were determined and implemented through the introduction of additional inertial elements into the system structure. With an appropriate choice of system parameters, the vibration platform can be invariant with respect to the deviation to the kinematic effect xj(t). The necessary conditions that can be obtained by parallel inclusion of inertial and elastic elements in systems with low friction were considered.
Implementation of the six sigma method in the educational process
Authors: Kremcheeva D.A. , Kremcheev E A 
Published: November 2019

Abstract
The article describes the theoretical and practical aspects of the Six Sigma methodology and features of its implementation to optimize the educational process. The regulatory documents that can be used in the implementation of the method were analyzed. Particular attention was paid to the practical features of the implementation of the Six Sigma method and the development of target indicators of the educational process effectiveness. The developed system of performance targets is reliable and measurable and can be used in assessing the effectiveness of the educational process. The study also provided insights into the benefits of using the Six Sigma method in an educational institution. The goal of the study is to adapt the Six Sigma method for its use in the educational process and to analyze the main difficulties in the implementation of the method. The object of research in this article is the educational process. The analysis of scientific data, systematization was used in the article as a research method. Target performance indicators were developed by compiling and detailing information from literary sources, government standards and regulatory documents.
Low-cost sorption technologies for large-tonnage wastewater treatment in mining industries
Authors: Matveeva V A , Chukaeva M A , Sverchkov I P 
Published: November 2019

Abstract
The current state of water bodies in the zone of influence of the largest mining complexes in Russia – JSC “Apatit” and JSC “Kovdorsky GOK” was assessed on the basis of the conducted monitoring studies. The review of the natural and artificial materials with the high sorption capacity was carried out on the purpose of elimination of the revealed sources of hydrochemical anomalies. The paper presents the laboratory test results of sorbents depending on the methods of their modification, composition and properties of purified water. The introduction of developed sorbents into the wastewater treatment systems will significantly reduce the negative impact of the mining enterprises on surface waters, thus it will improve the environmental situation in the studied areas and the life quality of the local community.
Study of electronic and optical-mechanical levels
Authors: Pimshin Yu I , Zayarov Yu V , Arsenyev D M 
Published: November 2019

Abstract
The article presents the study of electronic and optical-mechanical levels. It describes the vertical comparator and the method of its use in the study of levels. In addition, a variant of the universal comparator which improves stationary capabilities is proposed. In the study of levels the errors in measuring exceedances at specified working distances are determined, including a description of the procedure for determining errors of undercompensation of the level slope and the total error of the course correctness of the telescope focusing lens and the errors of applying divisions of the range poles for optical levels, and scales with Rab-code divisions for electronic ones. The article is written as part of the implementation of the NRNU MEPhI Competitiveness Enhancement Program.
Automation of mass fraction determination of water in petroleum in the laboratory
Authors: Serzhantova M P , Tynchenko V S , Bukhtoyarov V V , Petrovsky E A , Kukartsev V V , Tynchenko V V 
Published: November 2019

Abstract
Petroleum quality indicators should be monitored at all stages of petroleum production, preparation and transportation quickly and efficiently. Such a critically important indicator as the mass fraction of water in petroleum determines not only its quality, but also has a huge impact on the performance properties of the equipment and the pipeline. The article demonstrates the automation of laboratory research in determining the mass fraction of water in petroleum: the modernization of existing research using optical sensors and a data acquisition board. As a result, the complexity of the research is reduced, the work of laboratory research is optimized. The article presents the assembly diagram of the automated installation, compiled an algorithm for the software.
Numerical modeling of thermodynamic parameters for mixtures with a few-parameter equation of state of their components
Authors: Maevskii K K 
Published: November 2019

Abstract
The results of numerical experiments on shock-wave loading of heterogeneous mixtures including tungsten and copper as a component are presented. Thermodynamically equilibrium model with a modified equation of state is used for modeling of thermodynamic parameters of pure materials and mixtures. The thermodynamic parameters for copper of different porosity are calculated for few-parameter equation of state, values of compression ratio and temperature along the shock adiabat are determined; the value of heat capacity at normal pressure is calculated. The results of calculations are compared with the known experimental results of different authors. The calculation of thermodynamic parameters under shock-wave loading for mixtures including tungsten and copper as a component is performed.
Experimental research of thermodynamic properties of water + aliphatic alcohol mixtures in the wide range of parameters of state
Authors: Osmanova B K , Bazaev A R , Bazaev E A 
Published: November 2019

Abstract
Experimental data of p, r, T, x - relations for water+aliphatic alcohol binary systems (methanol, ethanol, n-propanol) for values of composition x (0.2, 0.5, 0.8 mole fraction of alcohol) among the phase equilibrium line in one phase (liquid, vapor) and in supercritical regions are described by polynomial polynomial equation of state, represented by expansion of the compressibility factor Z = p/RTρ into a power series of density and temperature:

Z
=

p

R
T

ρ
m

=
1
+

∑

i
=
1

m

∑

j
=
0

n

∑

k
=
0

s

a

i
j
k

ω
i

x
k

/

τ
j

, and

p
=
R
T

ρ
m

=

[

1
+

∑

i
=
1

m

∑

j
=
0

n

∑

k
=
0

s

a

i
j
k

ω
i

x
k

/

τ
j

]

, where ω = ρ/ρc
and temperature τ = T/Tc
– is reduced density and reduced temperature; ρc
, Tc
– critical density and critical temperature; R = 8.314 J/(mol⋅K) is the universal (molar) gas constant.
The average relative deviation of calculated values of pressure from experimental ones is 1.1%. By using this equation and expressions thermodynamic properties: coefficient of isothermal compressibility KT
, coefficient of volume thermal expansion, pressure coefficient, internal pressure pi
, isochoric heat capacity Cv
, isobaric heat capacity Cp
, speed of sound, adiabatic index k, Helmholtz free energy F, Gibbs energy G, entropy S, enthalpy H, internal energy U, differential isothermal throttling effect dis
, differential adiabatic throttling effect dad
.
Correlation between the electrical resistivity and thermal expansion of intermetallide Ti3Al
Authors: Murlieva Zh Kh , Palchayev D K , Iskhakov M E , Rabadanov M Kh 
Published: November 2019

Abstract
The results of in situ studies of the electrical resistivity (ρ) and the thermal expansion coefficient (α) of the polycrystalline Ti67Al33 intermetallide in the 300–1000 K range are presented. It has been established that the temperature dependence of the electrical resistance of single-crystal and polycrystalline samples differs significantly, and the corresponding heat treatment of this alloy makes it possible to control the values of the resistivity. It is shown that there is a correlation between the dependences ρ = f (T) and α = f (T) in the indicated temperature range.
Simultaneous analysis of the enthalpy increment and heat capacity data measurements for updating the IVTANTHERMO database
Authors: Sineva M A , Morozov I V , Belov G V , Aristova N M , Lavrinenko Ya 
Published: November 2019

Abstract
An analysis of the enthalpy increment and heat capacity data measurements is required for developing thermodynamic databases such as the IVTANTHERMO database created in the Glushko Thermocenter of JIHT RAS. A new CondensedThermoFit code is developed which provides experts with a comprehensive set of analysis tools for working with data on the specific heat and enthalpy increments for substances in the condensed state. These tools include simultaneous approximation of these two types of data. The enthalpy increment data is treated using the Shomate method while the heat capacity data is fitted with a flexible and manually constructible function. Only polynomial-like fitting functions are implemented so far. The final results are ready for exporting into the database with a fixed form of the fitting function such as the IVTANTHERMO database. The code has a cross-platform design, extensible module structure and graphical user interface.
On importance of the multi-level chemical objects description in various problem domain models for information systems integration in inorganic materials science
Authors: Dudarev V A , Kiselyova N N 
Published: November 2019

Abstract
The paper proves the urgency of the integration of information systems (IS) on the properties of inorganic substances and materials (PISM). It is shown that consolidation is possible only on the basis of the problem domain formalization. The basic definitions are introduced and the formalization of the IS on PISM content is proposed on the basis of three models: verbal, set-theoretic and ontological.
Development of internet resources to assess the effectiveness of some GTP
Authors: Ochkov V F , Ustyuzhanin E E , Rykov S V , Shishakov V V , Znamensky B E , Tun Aung Thu Ya 
Published: November 2019

Abstract
The analysis of Internet resources is fulfilled. These resources contain such information as: (i) data on the thermal properties of substances, R = (ρ, h, s, …), (ii) numerical data on the efficiency and other energy criteria, Z, of power plants. Our analysis has shown some features of the resources. Currently the most of them have the form of text files. The second type of the resources represents a software in the form of “exe-file” and allows the client to calculate values of R using a mathematical formula (MF) at boundary conditions, Y = (P, T); the latter are the pressure and the temperature. In this case, the resource includes the program, which is closed to clients: there is no such option as “to copy MF formula” in the software. A group of researchers offers the software, which is designed to calculate R properties and has the form of the open interactive Internet resource (OS). A computational part of OS-resource includes: (i) MF formula, which associates the property R with the parameters Y = (P, T, …), (ii) Mathcad-program Code(R, Y) containing MF formula. The interactive part of the OS-resource is based on the computer science and Internet technology (IT). The report analyzes the methodological techniques and IT-tools, which have to be used to create OS-resource. We have considered OS-resources, which have a complex structure and are focused on the joint use of (i) the code designed to calculate the efficiency of power plants and (ii) OS-resources those allow to calculate R(Y) at specified points of the power plant cycle. We have discussed some results obtained on the basis of these resources.
Nanodiamond graphitization at heating and irradiation
Authors: Efremov V P , Zakatilova E I 
Published: November 2019

Abstract
In this work the graphitization and thermal stability of detonation nanodiamonds were studied. Received data showed that the temperature of graphitization of nanodiamond particles lies in wide range and the temperature of graphitization beginning depend on the particle size. It is established the influence of heating rate on the size of nanodiamond conglomerates. The analysis of literature shows that the graphitization processes take place at irradiation. Depending on the type and irradiation dose the point defects, amorphous and graphite phases can form in the diamond structure. Annealing of irradiation samples showed the defect structure restore to ideal lattice and the release of stored energy.
Precise measurements of thermodynamic parameters of low-boiling metallic liquids
Authors: Blagonravov L A , Modenov A A 
Published: November 2019

Abstract
In Blagonravov et al (2000 J. Non-Cryst. Solids 277 182) the results of the thermophysical properties study of caesium in the region of the anomalous behavior of these properties were presented. Interpretation of these anomalies is difficult due to the small size of the effects. At the site of the forced growth of the adiabatic thermal pressure coefficient (a.t.p.c.), the magnitude of the effect was 5% with a random error of 2%. In the proposed work, an attempt was made to increase the accuracy of measurements in order to obtain additional information on the behavior of thermodynamic derivatives in the region of their anomalous behavior. The measurement was made by the experimental facility in which the pressure change is carried out in a periodic mode. The software allows simultaneous averaging of the amplitude values of the pressure oscillations and the amplitudes of the temperature response oscillations with the subsequent determination of their ratio. Measurements of the thermodynamic derivative

(

d
T

d
P

)

s

of liquid caesium were carried out in the temperature range of 320–620 K. Random measurement error was 0.5–1%. The results obtained are analyzed in comparison with the similar results obtained in Blagonravov et al (2000 J. Non-Cryst. Solids 277 182).
Determination of melting point of n-alkanes by means of light scattering technique
Authors: Kuryakov V N , Ivanova D D 
Published: November 2019

Abstract
A modified droplet technique, an optical method, was used to determine the melting temperature of several n-alkanes. The authors prepared emulsions of n-alkanes in water by means of ultrasound dispersing without the use of surfactants. The average size of the paraffin cluster measured by dynamic light scattering had a radius of about 100 nm for all the samples. During heating, n-alkanes in the emulsion melt changing the optical properties of the emulsions. The sharp variation of light scattering intensity for a relatively small change in temperature corresponds to a phase transition of the n-alkane. Using the described principles, the authors determined the melting temperatures for n-alkanes from C19H40 (n-Nonadecane) to C28H58 (n-Octacosane). The obtained results are in good agreement with data of other works.
Numerical modeling of gasification and combustion of solid fuels in a solid fuel ramjet combustor
Authors: Razmyslov A V , Sultanov V G 
Published: November 2019

Abstract
In order to investigate features of processes inside a combustor of a solid fuel ramjet a numerical model was employed. The model is based on Reynolds-averaged Navier-Stokes equations along with turbulence and combustion models and considers solid fuel pyrolysis. Experimental data from an earlier work was used to validate the model. Dependencies of air mass flux on some combustor performance parameters were obtained for different solid fuels.
On vortices in the tube flow of ideal media
Authors: Denisenko V V , Fortova S V , Shepelev V V , Troshkin O V 
Published: November 2019

Abstract
Numerical simulation is presented, which models the evolution of the initial perturbation in axisymmetric subsonic flow of an ideal gas. The undisturbed flow is an axial flow perturbed by an azimuthal velocity, or a twist of the flow around the axis of symmetry. The twist leads to the establishment in the flow of an annular or ball vortex with increasing or decreasing radial axial velocity of the undisturbed flow, respectively.
Effect on the heat of hydration, setting times and mechanical resistance adding fly ash and blast furnace slag in commercial cement mixtures
Authors: Gutiérrez-Junco O J , Hernández Carrillo C G , Sarmiento Rojas J A 
Published: November 2019

Abstract
Commercial Portland cement is the most used construction material in the world, due its durability, versatility and economy generated in civil works, which follows a growth trend; however, a large amount of energy is required for its production, which generates a large amount of greenhouse gas emissions and air pollutants. Consequently, a large part of research has focused on mitigating these effects by partially replacing supplementary cementitious materials. Therefore, this research aims to evaluate the performance of commercial cement paste, partially replacing it with fly ash and blast furnace slag, characterized by scanning electron microscopy, X-ray fluorescence, surface area to establish variations of setting times and heat of hydration in hardening process. The results established that fly ash and blast furnace slag didn’t generate sufficient capacities to develop stable cementation reactions and therefore higher strengths, due to their compositions surface area and the high content of alternative cements present in the commercial Portland cement since its manufacture. Nevertheless, the fly ash and blast furnace slag are alternatives in mitigating the environmental effect generated by commercial cements.