bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental Study on Variation of Tilted Angles Toward Acoustic Power of Thermoacoustic Engine
Authors: Anugrah R A 
Published: November 2019

Abstract
Tilted angles have to be researched for determining the good position of thermoacoustic engine. The research aims to find the best acoustic power with a tilted angle of the position, therefore the performance of Standing-Wave Thermoacoustic Engine (SWTE) is going to be increased. The performance is affected by the tilted angles. The natural convection which occurs in the core of Themoacoustic Engine will be different every tilted angle. The heat transfer characteristics within it were investigated under three tilted angles including, -90°, 0°, and 90°, with the resonator length 780 mm. This study was for getting the acoustic power which used the two sensors method with Data Acquisition (DAQ) NI-DAQmx 15.5 and two pressure transducers. It was calculated by Matlab R2013a. In this research is found that the acoustic power which is the best value is resulted on 90° of tilted angle, while the smallest value is found on 0°. Thes matter can be occured because phase difference of acoustic wave on the 90° is the biggest value, while the 0° is the smallest value. Further, have to study how phase difference has big effect toward the horizontal position which is resulted on the worse value compared the vertical position.
Requirement analysis of e-library application using Mandatory Desirable Inessential (MDI) and Technical Operational Economic (TOE) method
Authors: Putera AR , Riyanto S , Arianto M 
Published: November 2019

Abstract
The purpose of this study was to find out the requirement analysis to build e-library applications that will be managed by the Informatics Engineering Study Program at the University of PGRI Madiun. The focus of this study was requirement analysis using the Mandatory Desirable Inessential (MDI) method and Technical Operational Economic (TOE) methods. The analysis of online library information system requirements in this study was based on functional and non-functional needs analysis. This requirement analysis is based on functional requirements analysis that resulted 23 strategic information items to be done technically and operationally and resulted 4 non-functional items. Analysis of functional requirements based on feasibility resulted 12 technical items with middle or capable risks, and 9 operational items with middle or capable risks and 2 operational items at low risk or easy to do.
The development of the practicum based environmental pollution module for guided inquiry which collaborates video to improve student learning outcomes
Authors: Nugroho P A , Puspitasari Y D 
Published: November 2019

Abstract
The research aims to find out the improvement of student learning outcomes by applying the development of guided inquiry-based environmental pollution practicum modules that collaborate on videos. The syntax of guided inquiry, namely: identification problems, formulating hypotheses, collecting data, interpreting data, and conclusions. All are packaged in an environment- collaborating video pollution practicum module, where the learning outcomes used are from the implementation of the guided inquiry syntax listed in the module and student cognitive problems. The type of research is modified R&D (Research & Development) Borg and Gall (2003). The research sample is in the form of initial product trial sample, limited field trial sample, and operational field trial sample. The instruments used were a questionnaire, observation, and test. Based on the results of research when conducting water, soil, and air pollution practicum’s that have been carried out using the application of video collaborating modules, the results are obtained based on the syntax implementation (70.8%, 77.2%, 85.4%) and based on the results cognitive learning (79.87%, 83%, 86.40%). The results of the assessment of student learning outcomes at each meeting are increasing, so that the application of guided inquiry-based environmental pollution modules that collaborate videos can improve student learning outcomes.
The selection of Calcium Milk Products that are appropriate for advanced age using PROMETHEE II Algorithm
Authors: Irnanda Khairunnissa Fanny , Arifah Fatimah Nur , Raharjo Mokhamad Ramdhani , Arifin Ardian , Windarto Agus Perdana 
Published: November 2019

Abstract
The selection of Calcium Dairy Products that are suitable for old age uses the PROMETHEE II Algorithm. This study aims to recommend calcium milk products that are appropriate for elderly people based on consumer selection. This research was conducted in Simalungun district using interview techniques, observation and questionnaires to 350 elderly respondents randomly. This study also uses a quantitative data approach, which is testing four calcium milk products (alternatives) that are considered appropriate for use in old age. The four dairy products are widely used for the elderly, namely: Anlene Gold (A1), Entrasol (A2), Prolansia (A3) and Appeton 60+ (A4). The assessment criteria used in the selection of calcium milk recommendations appropriate for old age are: price (C1), content (C2), side effects (C3) and taste variants (A4). The solution used is to use a decision support system with PROMETHEE II algorithm. The results of PROMETHEE II calculation show that Anlene (A1) is obtained as the first recommendation of the right calcium milk with a value (net flow 0.5) and Appeton 60+ (A4) as the second recommendation with a value (net flow 0.484).
Diagnostic methods and tools for truck parts and components
Authors: Abdulaev E K , Makharatkin P N , Shihov A I 
Published: November 2019

Abstract
This article discusses a variety of diagnostic parameters and different control methods applied to trucks which are operated in open-pit mines. It contains the classification of truck parts and components based on their functions and the description of the main diagnostic parameters for each classification group. It analyzes equipment health monitoring practices and methods of predicting mean time between failures (MTBF) for the reduction drives of wheel motors produced by different companies. It describes one of the operational factors determining the choice of a nondestructive testing (NDT) method for the selected equipment. It analyzes the cost-effectiveness of using NDT methods and describes effective ways to reduce costs when using OTR tires taking into account the dependence of tire life on tire pressure and temperature.
Development of automated measuring device with magnetic fluid
Authors: Baranov B A , Sokolov A Yu , Malakhov I V 
Published: November 2019

Abstract
The article presents theoretical principles of the methods and devices for water activity (aw) measurement. The purpose of the research is the increase of the validity of water activity indicator measurement on the basis of a direct method of material test; the optimization of the structure of an automated measuring device to provide the possibilities for a simultaneous study of several samples (for example, food materials) with various water activity levels. A developed measuring device allows a simultaneous determination of indicators in several samples (8) located circumferentially and includes thermal sensors. The sensors in this device are represented by induction coils. They are installed on both leg pipes (made of nonmagnet materials) of a liquid level manometer. The device contains a special silicon organic oil with the pressure of partial steams within 10-6 Pa (at normal conditions) used as a manometric liquid. While measuring the device is vacuumized and thermostated. The method and device approbation resulted in making calibration charts at various temperatures, approximated with the help of software. The device provides the validity of measurements in water activity range from 0.45 to 1.0.
System of process control for associated concentrate nanostructures production
Authors: Ershov V A , Gorovoy V O , Nebogin S A , Govorkov A S , Suhanov A S 
Published: November 2019

Abstract
The article presents developed automated process control system of the associated concentrate nanostructure production and the technical and system software, which includes a local process control system and software and hardware that are shared by the technological purpose. The main technological parameters controlled and managed by the APCS are reflected. The article presents the composition of lower-level control system of the plant for production line nanomaterial products, software and hardware complex heat-exchanger and coagulator. The requirements to the functioning modes of the APCS ACNP are presented. It is shown that the developed automated control system of technological process of associated concentrates nanostructures provides the opportunity for the system structure development, including the increase in the number of measurement points using a margin of 10% on signals of input/output. While software and information support of automated control systems CNAA involves changing the configuration of the system and possibility of its expansion through modernization and the introduction of new tasks (complexes of tasks and algorithms).
Intensification carboaluminate technology of ultradeep desiliconization
Authors: Feoktistov A Yu , Pavluk D A , Ivanova E V 
Published: November 2019

Abstract
The article presents the results of the study of the effect of additive hydrogarnet sludge on the process of carboalumination desiliconization of aluminate solution. It is proved that type-ahead hydrogarnet sludge significantly intensifies the process of ultra-deep desiliconization due to the catalytic effect of the surface of the slurry in accordance with the theory of heterogeneous catalysis. A mathematical process model for the process of superdeep desiliconization in increased turnover hydrogarnet sludge is presented.
Mechanical properties measurements with portable hardness testers: advantages, limitations, prospects
Authors: Gogolinskii K V , Syasko V A , Umanskii A S , Nikazov A A , Bobkova T I 
Published: November 2019

Abstract
The article presents an analysis of the most common hardness measurement methods, implemented by portable hardness testers: rebound or Leeb method, static Portable Rockwell (PR) method and Ultrasonic Contact Impedance (UCI) method. These methods are reviewed in terms of the physical nature of the measurements and the influence of the measured sample properties and the probe parameters on the measurement result. The review contains advantages of each method, possible applications, as well as limitations due to the operation principles of probes. The article also contains the analysis of solving the problem of measurement results validity and their conformity with standardized hardness scales.
Approximation of amplitude-frequency characteristics using equidistants
Authors: Gozbenko V E , Kargapol’tsev S K , Karlina Yu I , Karlina A I 
Published: November 2019

Abstract
Building an equidistant curve to amplitude-frequency characteristic of oscillatory system with one degree of freedom, we introduce the limited damping. The analogous studies were carried out for the systems with the large number of degrees of freedom and analogous conclusions were obtained. It is possible to conclude that the equidistant curve, as a volumetric curve, reflects the results, obtained in the experiment and observed on the screens of different instruments with the study of technical systems.
Method of indirect estimation of lubricating properties of petroleum products
Authors: Kondrasheva N K , Zyryanova O V , Ivanov A S , Kosolapova S M , Kireeva E V 
Published: November 2019

Abstract
In this research, a new method for evaluating the lubricating properties of prophylactic agents was developed. For the method, specialized metal models and a press with a strain-gauge s-shaped gauge, using for recording shear load indicators, were designed. Using the new method, prophylactic agents based on mixtures of light and heavy gas-oil catalytic cracking and delayed coking with the addition of tar or cracking residue as depressor additives were analyzed. A research of the hydrocarbon composition of the prophylactic agent, which was correlated with the removed shear load diagrams, was also made. As a result, the dependencies of the lubricating properties of fuels with a change in their fractional composition were identified, and the most effective PAs were determined.
Approximation of testing of asphalt concrete to the actual operating conditions of road surfaces
Authors: Kovalev N S , Otarova E N , Gladnev V V , oglu Sadigov E A , Demidov P V 
Published: November 2019

Abstract
Existing test methods for asphalt concrete do not consider the actual operating conditions of road surfaces. The method, equipment and results of studies of the influence of the combined effects of vibration vacuum water saturation, ultraviolet irradiation and freezing-thawing on the structural and mechanical properties of asphalt concrete from slag materials are presented.
Peat and mineral anticaking agents for powdered nitrile-butadiene rubbers
Authors: Misnikov O S 
Published: November 2019

Abstract
The article discusses caking of loose materials and main methods of its prevention. The main characteristics of nitrile-butadiene rubber are outlined. It is possible to obtain hydrophobic-modifying additives during thermochemical degradation of organic matter peat. The author presents a method for analyzing anticaking agents based on peat and mineral compositions. The comparative analysis of the effectiveness of anticaking agents made of kaolin and chalk is made. It is established that the treatment of powdered nitrile butadiene rubber with a hydrophobically modified chalk makes it possible to reduce its ability to cake by 22.5 times during long-term storage compared with the control sample.
Influence of the shape of quartz sand particles factor on single particle erosion damage
Authors: Nasyrova M I , Kulakov P A 
Published: November 2019

Abstract
The paper presents data on the influence of aerodynamic factor of quartz sand particles on a single particle erosion damage as a part of investigation of gas-abrasive wear of field equipment steel elements caused by solid particles impact in conditions of sand production of wells. The studies are mainly focused on calculating geometric characteristics of the crater obtained as a result of a single particle impact, such as maximum penetration depth and equivalent diameter of the crater, affected by the shape of the sand grains. The results have shown the significance of experimental and numerical data, including sphericity, roundness and shape factor of particles determination towards further calculation of particles impact parameters.
Numerical simulation of a draining vessel
Authors: Nasyrova M I , Kulakov P A 
Published: November 2019

Abstract
In this paper the models of a theoretical tank and a real size draining vessel are described and numerically simulated. The main idea is to demonstrate the Toricelli’s law theorem for fluid dynamics for ideal liquid both for a theoretical vertical cylindrical tank and for a different geometry horizontal vessel of the same volume as the tank and compare the total time of liquid leaving the space of both of the reservoirs. The simulation is a multiphase problem containing two phases, which are water and air, is based on the VOF (volume of fluid) method discrete elements method (DEM) for simulating the sand bed formation for outlet nozzle capacity evaluation. As a result there are two-phase (gas-liquid) models of an “ideal” tank and an industrial vessel numerically calculated for determining and comparing the total time of water draining, and an extra model showing the dependence of sediment layer thickness on the outlet nozzle capacity.
Study of the dynamics and analysis of the effect of the position of the vibration motor to the oscillation of vibrating screen
Authors: Nguyen Van Xo , Nguyen Khac Linh , Dinh Gia Nghiem 
Published: November 2019

Abstract
A vibrating screen is a device for sorting materials, which is widely used in screening plants. The working ability of a vibrating screen relies on various parameters, such as dynamic parameters, technological parameters, and so forth. If it is necessary to find a reasonable set of parameters in order to enhance the machine’s performance, it is essential to set up the vibration equation of the vibrating screen. This is also a part of the research content that the article mentions. The next step is to establish the equation of motion of random point-P on the screen box, conduct the simulation, and discuss the effect of the position of the vibratrion motor on the oscillation of vibrating screens. The result reveals that the farther the point is from the focus of vibrating screen, the higher the effect of the vibration motor placement on the amplitude of vibration will be. The points are symmetrical with each other across the focus tend to create the rule of change is opposite. When the vibration motor is moving in the positive direction of the horizontal direction, the vertical oscillation amplitude of the points lying on the upper sieve will increase gradually, while the bottom points will decrease progressively. When the vibration motor is moving in the negative direction of the horizontal direction the change rule is opposite to the case of positive direction; if the vibration motor is 0.3 meters away from the focus of screen, the vertical vibration amplitude of the points on the sieve reaches the maximum value. The research results are of considerable significance to reasonably design parameters for vibrating screen working well.
Development of an operational environmental monitoring system for hazardous industrial facilities of Gazprom Dobycha Urengoy
Authors: Pashkevich M A , Petrova T A 
Published: November 2019

Abstract
The article presents an assessment of the technogenic impact on the atmospheric air inflicted by oil and gas extracting and processing facilities in Western Siberia. It is revealed that heterogeneity and areal dispersion of emission sources are the key features of the considered industry. Mathematical statistics techniques allowed grouping sources of air pollution and determining the major air pollutants at the considered production facilities. It is proposed to design an automated operational environmental monitoring system with a hierarchical two-level structure for operational and reliable control of the natural environment in the impact area of the studied facilities.
Radio interferometric location finding of VLF signal transmitters
Authors: Poletaev A S , Chensky D A , Chensky A G 
Published: November 2019

Abstract
The article presents some experimental results of using a very low frequency (VLF) interferometer designed in INRTU for radio direction finding of VLF transmitters. It is evaluated that amplitude angular-position measurements provides azimuth accuracy of several degrees. Distant VLF stations (3000 – 5500 km) can be located in a 2-6 km area if the signal azimuth is known with 0.001° accuracy. In order to minimize errors associated with antenna’s angular offset the authors developed a correcting algorithm. Using both radio direction finding methods and additional geophysical data (year and daily variations of solar terminator moving, signal disturbances during solar flares) the authors ascertained that 24.1 kHz and 25.0 kHz signals are emitted from the transmitter in Mokpo (South Korea). The phase measurements give about two times lower error of 1.5–2° for the NWC station (19.8 kHz, Australia) which is located more than 8200 km away from the VLF interferometer.
Use of heading-and-winning machine parameter loggers to predict gas-dynamic phenomena at potash mines
Authors: Shishlyannikov D I , Pushkarev A E 
Published: November 2019

Abstract
The paper presents analysis of the main instrumental monitoring methods of potassium beds outburst hazard. The main disadvantages of the existing means of predicting gas-dynamic phenomena in potassium beds are the low automation level and the cyclicality of measurements at a certain pitch or time interval, which leads to a decrease in the productivity of mechanized combine systems and adversely affects the safety of processes in the shrink stopping. The main requirements are laid down, which shall regulate the development of methods and techniques for predicting gas-dynamic phenomena in potassium beds. Design and operating principle of VATUR software logging system developed by members of the Mining Electrical Engineering Department of the Perm National Research Polytechnic University is described. The results of experimental researches on estimation of size and character of change of energy parameters of a potassium bed fragmentation by operating cutters of Ural-20R heading-and-tunneling machines are presented. The researches have shown that the measurement technique and the equipment reveal deviations of specific power inputs of a potassium bed fragmentation by the machine’s operating members with high accuracy and speed. The results of the experimental studies made it possible to substantiate the prospects of using the energy parameter loggers of cutter-loaders at predicting gas-dynamic phenomena at potassium mines. The suggested concept of the software measuring complex can be used in the development of on-board parameter loggers of the heading-and-winning machines in potassium mines.
Forecasting indicators of thermal oxidative stability of lubricating oils
Authors: Kovalsky B I , Petrov O N , Shram V G , Bezborodov Yu N , Sokolnikov A N , Lysyannikova N N 
Published: November 2019

Abstract
The results of testing partially synthetic Total Quartz 10W-40 SL/CF motor oil for thermo-oxidative stability in terms of optical density, volatility and coefficient of thermo- oxidative stability are presented taking into account the thermal energy absorbed by the products of oxidation and evaporation. The linear dependences of the decimal logarithm of thermal energy absorbed by the products of oxidation and evaporation and the total thermal energy absorbed by these products from the decimal logarithm of the test time in the temperature range from 160 to 190 ° C are established. A graphical and analytical model is proposed for predicting the indicators of thermo-oxidative stability, determined by the dependence of the decimal logarithm of the thermal energy absorbed by the products of oxidation and evaporation on the temperature of thermostating.
Effect of coal-containing additives on the rheological properties of limestone-nepheline charge in the technology of alumina production
Authors: Siziakova E V , Ivanov P V , Nikitina T Yu 
Published: November 2019

Abstract
The article is devoted to the influence of brown coal additives on the sintering of the lime-nepheline charge in the technology of alumina production from nepheline. The process of extraction of humic compounds from brown coal is considered, the effect of humic additives on the rheological properties of pulp depending on the size and moisture content of carbon-containing additives is studied.
Development of the beneficial utilisation of urban sewage sludge using modern analysis methods
Authors: Smirnov Yu D , Suchkova M V 
Published: November 2019

Abstract
The article presents Russian and foreign experience in the recycling of sludge of urban sewage wastewater with the prospect of the beneficial use of both the direct waste and the products of its processing. Special attention is also paid to the problem of recycling of ashes of sewage sludge incineration. The article also considers the possibility of applying modern methods of analysis (such as X-ray fluorescence analysis, spectroscopy, biotesting) to develop a composition of the ash-based soil mixture. The study is realized on the laboratory and experimental base of the accredited Center for the collective use of high-tech equipment of Saint-Petersburg Mining University (as a part of state task for 2018-2019 year).