bluuebunny/crossref_metadata_2025_split huggingface dataset:
EFFECT OF TEMPERATURE, PRESSURE, AND FRACTION OF NANOPARTICLES ON CHANGES IN THE THERMAL CONDUCTIVITY OF COLLOID NANOFLUIDS
Authors: Tilloeva T R , Safarov M M , Zaripova M A 
Published: May 2022

Abstract
The paper presents the results of studies on the thermal diffusivity of colloidal nanofluids depending on the change in one of the state parameters (pressure). Studies were carried out both with a change in the pressure of the experiment, and with a change in the nanometric size of silver particles in a liquid. Based on the results obtained, the corresponding empirical equations were derived and a proper comparative analysis was performed by comparing the experimental and calculated data on thermal diffusivity. The suitability of the derived equations is evidenced by the satisfactory agreement between the obtained data and the calculated ones within 1.79% at α=0.95.
Density of Toluene-Based Nanofluids
Authors: Mirzoeva Q , Matlabi J , Safarov M M 
Published: May 2022

Abstract
The purpose of this work is to study the density of two-component titanium dioxide systems (nanosized particles of various fractions (30nm, -50nm and 70nm)) (up to 0.5%) + toluene in the temperature range (293) K at atmospheric pressure (0.101) Mpa.
Electrophysical parameters of AC plasma system
Authors: Oshenko I I , Smirnov S A 
Published: May 2022

AbstractExperimental results related to main characteristics of an underwater discharge with a frequency of 50 Hz and various types of electrodes were reported. The data on 1) discharge geometry; 2) current-voltage characteristics; 3) gas temperature and reduced electric field strength; 4) plasma emission spectra were obtained. Based on these data, the plasma modeling provided the information on densities of plasma active species.
Universal Structural and Dynamic Features in Metals Near Their Melting Points
Authors: Khairullina R R , Khusnutdinov R M 
Published: May 2022

Abstract
The results of a comparative analysis of experimental data for the equilibrium properties and characteristics of liquid alkaline earth (magnesium, calcium, strontium), alkaline (lithium, sodium, potassium) and transition metal groups: elements of the subgroups of nickel (Ni, Pd, Pt) and copper (Cu, Ag, Au) near their melting points are presented. Reduced spatial r/rm
= rkm
/2π and time

t
/

t
m

=
t

k
m

/

m
β

scales, in which km
is the first peak position of the static structure factor S(k) and β = 1/kBT is the inverse temperature, are introduced as the basis for the law of corresponding states. Based on these scale transformations and x-ray diffraction analysis, it was found that the groups of liquid alkaline, alkaline earth, and transition metals are described by universal r- and k- dependencies. It has been established that the dispersion law of longitudinal polarization ωc
(k), given in accordance with these scale relations, for elements of groups of liquid alkaline, alkaline earth and transition metals has a single universal character. An analysis of the properties of three groups (alkaline, alkaline earth and transition) liquid metals using scale transformations shows that the law of the corresponding states is valid for these substances.
A model of the positive column of longitudinal glow discharge in planar channel with additional gas injection through the side walls
Authors: Galeev I G , Asadullin T Y , Valeeva D R 
Published: May 2022

Abstract
A model of positive glow discharge column in longitudinal flowing glow discharge with an additional distributed gas injection through the side walls of flat channel is proposed. The main flow is pumped through mesh electrodes located at the beginning and end of the discharge chamber. The solution of an integro-differential system of equations is obtained, expressions for the distribution of the electric field strength, the degree of gas ionization, and the gas temperature in the discharge region are given.
Local density dynamics in a supercritical Lennard-Jones fluid
Authors: Khabibullin R A 
Published: May 2022

Abstract
The collective particle dynamics of supercritical Lennard-Jones fluid is investigated on the basis of molecular dynamic modeling data. The intermediate scattering functions and dynamic structure factor spectra for the wavenumber range k ∈ [0.18; 3.26] σ−1 were calculated. The characteristics of dynamic structure factor spectra such as the thermal diffusivity and the sound velocity were estimated.
The development of statistical analysis methods for the study of correlations and statistical memory effects in the recorded data of physical experiments
Authors: Demin S A , Yunusov V A 
Published: May 2022

Abstract
In this paper, we discuss the prospects for the use of statistical analysis methods in the study of correlations and statistical memory effects in the experimental data of physical experiments. Developed methods under consideration: Memory Functions Formalism and Flicker-Noise Spectroscopy allow obtaining a large set of quantitative parameters and qualitative characteristics directly from temporal signals generated by complex physical systems. Additionally, for the study of collective phenomena and effects, one- and two-parameter cross-correlation functions are proposed, which allow studying cross-correlations between simultaneously recorded signals in spatially separated areas of the object under study. The introduced analytical relations and numerical algorithms can be applied to solve the problems of metrology of surface structures at the nano- and microlevels, to study collective phenomena in the plasma of astrophysical objects, the structure of molecules, and their complexes.
The study of statistical features of the evolution of complex physical systems using adaptive machine learning methods
Authors: Yunusov V A , Demin S A , Elenev A A 
Published: May 2022

AbstractIn this work, we discuss various machine learning methods and their implementation in the field of complex physical systems for the analysis of experimental data. These methods: classical machine learning, neural nets and deep learning allow greatly outperforming classical analysis methods by giving the algorithm the ability to “learn” and perform tasks adapting to the data provided and search. Neural nets and deep learning approaches are used to search for hidden patterns of the suggested input data that can’t be analyzed using common methods. This variety of methods can be applied to study collective phenomena in plasma and thermonuclear fusion on the basis of experimental data of physical experiments with a higher level of performance than classical approaches.
Investigation of the structure of an aluminum nitride film for a Bragg reflector obtained by magnetron sputtering
Authors: Baranova L , Baysova B , Strunin V 
Published: May 2022

Abstract
The phase composition of the aluminum nitride film obtained through magnetron sputtering was determined with the help of X-ray phase analysis. The analysis revealed the AlN, Al and V phases deposited during the synthesis of the film. The structural parameters of the primitive unit cell of the AlN and Al phases were determined. The effect of texturing the resulting film was detected.
Control of The Distribution of The Internal Characteristics of The Discharge Using Supersonic Gas Pumping
Authors: Timerkaev B A , Petrova O A , Shamsutdinov R S , Sayfutdinov A I 
Published: May 2022

Abstract
Theoretical studies of the distribution of glow discharge parameters in a supersonic nitrogen gas flow between the central body of the nozzle and an annular electrode around the central body are carried out. Distributions of charged particle concentrations, potential, and electric field strength are obtained. The possibility of compaction or stretching of the cathode zones has been demonstrated. In the case of the organization of a supersonic gas flow near the central body-the anode, all the near-electrode zones are pressed against the anode. In this case, the cathode is located in the area of reduced pressures. Such a way of organizing the discharge can find application in the processes of applying functional coatings.
Production of Hydrogen From Heavy Hydrocarbons
Authors: Timerkaev B A , Ganieva G R , Shakirov B R , Zalyalieva A A , Shamsutdinov R S 
Published: May 2022

Abstract
The mechanism of the effect of an arc discharge on heavy hydrocarbon raw materials is studied in the work. The mechanism of formation of charged particles in micro-discharges with recessed electrodes is shock ionization. As a result of the interaction of hydrocarbon raw materials with an arc discharge, long hydrocarbon molecules are broken down, light hydrocarbons such as ethylene, hydrogen, and methane are formed. In the case of the organization of a micro-arc discharge, a gentle thermal regime also provides a gentle splitting of long hydrocarbon molecules, and in this case gasoline fractions of oil are formed in greater quantities compared to the case of exposure to raw materials by a conventional arc discharge.
Hydrophilization of the surface of a natural hydrophobic material by non-equilibrium low-temperature plazma
Authors: Rakhmatullina G R , Tikhonova V P , Nizamova D K , Akhverdiyev R F , Bigeyeva K F 
Published: May 2022

Abstract
We considered the effect of non-equilibrium low-temperature plasma for hydrophilization the surface of fish skins. Fish skin is a hydrophobic material in its nature. The relevance of this issue is justified by fact that the dressing of animal skin is a series of consecutive liquid processes. Natural structure of fish skins promotes the poor diffusion of working solutions, so it hinders a chemical modification of materials. The plasma processing of fish skin provides the partition of supramolecular structure of collagen (basic protein of dermis) due to disruption of weak intermolecular bonds. This leads to better diffusion of chemical materials and as a result, liquid processes intensify and time production cycle reduces.
Application of plasma methods for the synthesis of nanostructures
Authors: Masyanov A A 
Published: May 2022

Abstract
There are many plasma methods for the synthesis of nanostructures, for example, the plasma-chemical vapor deposition method, the cathode-arc deposition method, the plasma jet method, the ion sputtering method, etc. Each of the listed methods can be organized in various ways, and each method is suitable for creating certain nanostructure.
First-Principle Molecular Dynamics Study of Methane Hydrate
Authors: Yunusov M B , Khusnutdinov R M 
Published: May 2022

Abstract
Currently, much attention of the scientific community and the gas industry is focused on the structural, physical and thermodynamic properties of gas hydrates. This interest is explained by the fact that there is a prospect of using natural gas hydrates as a new fuel source. This article presents the results obtained during the first-principle molecular dynamic study of the thermal and electronic properties of hydrates. For hydrates of methane with cubic sI and hexagonal sH configurations, the average heat capacity Cv
was computed. The densities of electronic states are studied for filled and unfilled configurations of sI and sH hydrates. The spectra of electron energy were calculated for sI hydrate, which has unfilled molecular cages. Also, for methane and ethane hydrates, the binding energies between the framework and the gas molecule are calculated.
Experimental and computational study of arc discharges in powerful alternate arc heater
Authors: Mironov V V , Kozaev A S , Negodyaev A S 
Published: May 2022

Abstract
The paper deals with the results of computational and experimental research on the formation process of electric arc discharges in a three-phase Zvezda-type alternating current arc heater. A flow modelling in the arc heater, as well as an experiment on providing a visual control for the location and the shape of arc discharges were conducted. A device of a visual control system is presented. The analysis of the results obtained from experimental research is carried out.
A new approach to estimating kinetic rate factors of phase transformations
Authors: Yarullin Dinar T. 
Published: May 2022

Abstract
An original approach is proposed to estimate of the main kinetic factors that determine the rate of phase transformations in condensed matter. These factors define the frequency of atom transitions from different phases during phase transformation induced by undercooling, high pressures or mechanical impact. On the example of crystallization of a model amorphous system, it is shown that this approach gives a correct estimation of the crystal growth and crystal decay rates both at the initial stage of the phase transition and at the stage of coalescence of crystalline structures.
Investigation of a high-frequency magnetron sputtering system operation modes during copper thin films deposition
Authors: Tumanov N A , Kirillov D V , Vorob’ev E V 
Published: May 2022

Abstract
The results of studying the radio frequency (RF) magnetron sputtering (MS) operation parameters during copper sputtering are presented. A comparison of the growth rate dependence on power during the operation of MS is made in RF and DC modes. The pressure dependences of the RFMS growth rate and bias target voltage are obtained. The prospect of using RFMS for deposition of smooth coatings is shown.
Confidence of nano-measurements of Hf-Ti-N multilayer PVD condensates from the plasma phase
Authors: Mironov M M , Grebenshchikova M M 
Published: May 2022

Abstract
The microhardness and thickness of PVD coating layers made of titanium and hafnium nitrides were measured experimentally. The standards of TC 441 were analyzed. The sequence (protocol) of the analysis of nano-measurements and obtaining reliable measurement results was given. To obtain a quantitative value of the reliability of measurements for superhard nanocoats is proposed to use for educational purposes the calculation of the confidence interval using the Student criterion.
Three-color pyrometry study of radiation and gas dynamic processes in a heterogeneous plasma-vortex ring
Authors: Volodin L Y 
Published: May 2022

Abstract
The paper presents the results of a study of a heterogeneous plasma vortex ring using the three-color image pyrometry technique. The vortex ring is formed during deceleration of a supersonic pulsed aluminum plasma jet in atmospheric air. A technique for calibrating a digital camera and a post-processing process for images are proposed that makes it possible to visualize the internal structure of the vortex. As a result of the study, the effect of vortex separation of condensed and gas flow components was experimentally demonstrated.
Electric discharge generator of long-lived plasma formations in atmospheric pressure air
Authors: Volodin L Y , Kamrukov A S 
Published: May 2022

Abstract
The paper presents the results of a study of the developed pulsed plasma generator based on the cylindrical foil electric explosion. The generator is used to form large-scale toroidal plasma vortices in atmospheric air. The influence of the specific stored energy on the phase composition of the plasma flow and the lifetime of plasmoids using a high-speed camera was studied. It was found that large condensed particles in the flow do not participate in the vortex motion and cause the destruction of plasma vortices. The formation conditions of stable plasma vortices were determined.
The 3rd International Conference on Geoscience and Earth Resources Engineering: Geosciences and Earth Resources Engineering for Sustainable Future (Preface)
Authors: Sahara David P. , Hidayat Taufiq , Aslam Billal Maydika , Zulfakriza  , Wattimena Ridho K. , Syafrizal  , Alawiyah Susanti 
Published: May 2022

Abstract
The issue of IOP Conference Series: Earth and Environmental Science contains the outstanding papers presented at International Conference on Geoscience and Earth Resources Engineering (ICGERE) 2021. Due to Covid-19 Pandemic, the 3rd ICGERE 2021 Conference was held online on 8 – 9 December 2021.
List of Committees are available in this pdf.
Manufacture Hollow Glass Microsphere (HGS) in University Laboratory Scale (Phase 1)
Authors: Marbun B T H , Pande B , Sinaga S Z , Purbantanu B A 
Published: May 2022

Abstract
Hollow Glass Microsphere (HGS) can be used as an additive of drilling fluid to decrease the density and hydrostatic pressure without changing the chemistry characteristic to make underbalanced drilling condition. HGS is relatively easier to be mixed with the fluid without complicated equipment, can prevent formation damage, and can improve oil and gas production. There are various HGS commercial products that have been developed in the industry for various purposes with a density range 0.125-1.1 gr/cm3, grain size range 2-120 μm, and compressive strength up to 200 MPa. HGS has been successfully used in underbalanced drilling operation in several oil and gas fields in Indonesia. HGS costs less than UBD and the application shows good results with the improvement of oil and gas production. However, the cost of commercial HGS products in the market is very expensive. Petroleum Engineering Study Program Institut Teknologi Bandung (ITB) performed the HGS research in three phases. The first phase reported in this paper was to manufacture HGS in the university laboratory scale. HGS was manufactured based on various chemical compositions and temperature and time variation of the burning process. Scanning Electron Microscope (SEM), Energy Dispersive Spectrometry (EDS), and X-Ray Diffraction (XRD) analysis were performed to identify and characterize the raw chemical material and manufactured HGS. HGS was successfully manufactured with the following characteristics: low density (<0.8 gr/cm3) and low grain size (20-40 μm). These characteristics show that HGS can compete with commercial industry HGS products that have been successfully used in the underbalanced drilling operation. The second phase is to scale-up manufacture HGS from university laboratory scale to industrial scale. The third phase is to test the manufactured HGS with drilling fluid according to the American Petroleum Institute (API) Spec. 13A and API Spec. 13B-1.
3D gravity data inversion modeling for subsurface identification of Gondang area, Bojonegoro regency
Authors: Mariyanto Mariyanto , Darmawan Reyhan Dzaky , Utama Widya 
Published: May 2022

Abstract
Gondang area had experienced an earthquake of a 4.2 magnitude in the mid-2015, showing that tectonics in the area are active. Also, the Gondang area has a mountain categorized as one of the eleven earth thermal prospects in East Java, i.e., Pandan Mountain. It is exciting to study the subsurface structures of the Gondang area. To date, precedent studies only present geological reviews of the surface. This study presents information on subsurface structure conditions based on gravity. The technique used was 3D inversion modeling with Single Value Decomposition (SVD) inversion. The study ’ s primary data were gravity data from 61 points with a study area of 6.9 km x 5.5 km from 3-10 September 2019. Secondary data utilized were Bojonegoro geological map and local geological studies. From 3D modeling results, slicing was conducted for five cross-sections based on density contrast. Then, the subsurface 2D cross-section results were interpreted for each section. Subsurface model results illustrated density distributions in south, northeast, and northwest areas with high densities ranging from 2.8 g/cc to 3.0 g/cc in >500 m depths. Meanwhile, the north, southwest, and southeast areas had low densities ranging from 1.70 g/cc to 2.0 g/cc in >500 m depths. Furthermore, it indicates the continuity of andesite intrusion from the south to the study site in >500 m depths.
Groundwater play in extensional regime: a case study in Cibunar Region, Garut, Indonesia
Authors: Hanif M , Parnadi W W 
Published: May 2022

Abstract
The intermountain Cibunar area of the Garut basin periodically suffered from a drought and thus became a devastating hazard. Its fault structure as an impact of the extensional regime might affect the groundwater play as a transport or barrier system. The tectonic setting and its disruption of volcanic lithologies by faults make the area's hydrogeology very complex. The conducted electrical resistivity tomography coupled with gravity and magneto-telluric studies revealed the aquifer play on the zone is affected by the extensional regime. Tectonically, the drought Cibunar district is close to the top of the horst structure where the uplifted segments might contribute to the limited low resistivity aquifer zone and triggered the flow to the graben zone. The low and high resistivity on the region was related to an unconfined aquifer and unsaturated zone, while the medium zone remains unclear.
Electrical resistivity survey for groundwater investigation in Padalarang, West Java
Authors: Phanjaya H , Parnadi W W , Santoso D 
Published: May 2022

Abstract
An electrical resistivity survey has been carried out in Padalarang, West Java, to investigate groundwater potential to solve the lack of clean water. The survey consists of three vertical electrical sounding (VES) and four electrical resistivity tomography (ERT) profiles in the study area. The data was processed using inversion method. Wells in the area is available to validate resistivity data. The result of VES shows a low resistivity value (2.82 - 11.72 Ωm) at its fourth layer, which we expected to be a zone with high water content. ERTs result also revealed a low resistivity value (<10.1 Ωm), approximately more than 60 m depth at ERT 3 and 4. We expect this low resistivity zone to have a groundwater potential. A low resistivity zone in the central part of the study area may yield a high groundwater potential. Our result could serve as a guide to engineers for planning on sitting boreholes either for domestic, agricultural, or industrial use.
Scaling and corrosion formation mechanism in geothermal piping system based on Pourbaix-Lindal diagram-Ryznar index and fluid velocity profile
Authors: Sutarno  , Syuryana E. P. , Saefudin D. B. 
Published: May 2022

Abstract
Geothermal fluid flow contains scale and corrosion species whose levels differ from each location of geothermal sources. The velocity of scale formation and corrosion mechanism due to specific parameters in case of total key species, flow rate, pressure and temperature of the geothermal fluid based on the Pourbaix-Lindal diagram -Ryznar index. The reduction in pipe diameter due to the scaling formation on the internal surface of the pipe correlates with the flow rate of geothermal fluid into the turbine, which drives the generator to produce electrical energy. This paper describes the mechanism of scale formation and the potential for corrosion on the internal surface of the piping through the momentum transfer approach of geothermal fluids to the turbine. Through this mechanism, curative and preventive measures can be taken to prevent premature degradation of the function and economic life of the geothermal piping system. The mathematical simulation results of fluid displacement momentum, the velocity of geothermal fluid flow, show that the velocity profile at the fluid-internal surface contact of the pipe is zero, which means that the species is at rest on the internal surface of the pipe. Thus, for scale species it will form a scale, while for corrosive species there will be a corrosion process on the internal surface of the pipe.