bluuebunny/crossref_metadata_2025_split huggingface dataset:
Feasibility of learning instrument with sainti-ka (characteristic of scientific) of Junior High Scholl on environmental pollution topic
Authors: Pasani C F , Putri R F , Yulinda R 
Published: March 2021

Abstract
This study aims to produce valid learning instrument with sainti-ka on environmental pollution topic to build the character of curiosity and responsibility of 7th grade of junior high school with scientific approach. This study was a research and development study. Borg and Gall development model was modified and used include only Define, Design, and Develop. This study produced learning instrument consisted of silabus, lesson plan, student work sheet, and achievement test. The results showed that the developed learning instrument are feasible to use and in the very good qualification.
Training and implementation of google applications for online learning in the pandemic covid-19
Authors: Herlina  , Lagandesa Y R , Azizah  , Asriani  
Published: March 2021

Abstract
Knowledge of the concepts of online learning and teacher skills in the use of information technology, is an important factor of online learning in the pandemic covid-19. Facts show that teachers’ knowledge and skills in online learning and the use of information and communication technology are still low. On the other hand students are prohibited from bringing mobile devices to school, with the reason to interfere with the lesson. Teachers and schools need to get help and guidance, so they can maximize learning even in the pandemic. The problem raised is how to improve the skills of teachers in online learning during the co-19 pandemic? The purpose of this activity is to provide skills as well as an understanding of how to use information technology for effective, efficient and safe learning from negative stigma that has been feared by schools and teachers. This activity using the guided training method and was carried out in four stages namely observation, training, mentoring and evaluation. The results of the activities showed that the training and technical guidance of online learning based on google application improve the skills of teachers in online learning
Reconstruction of HOTS problems based on questions in mathematics textbook
Authors: Tanujaya B , Mumu J 
Published: March 2021

Abstract
The purpose of this research was to reconstruct HOTS questions using questions in mathematics textbooks. The study was conducted used a research and development method. The objects of research and development were questions in mathematics textbooks using in junior high school. The research procedure consisted of collecting and selecting textbooks in mathematics instruction, selecting the topic of the subject, identifying and selecting problems, and reconstructing HOTS items. The item reconstruction phase included expert judgment and field trials. HOTS problem reconstruction was carried out through the improvement of questions in the textbooks so that the answers were not unique; the solution required several mathematical concepts and the use of other knowledge. The results showed that questions in mathematics textbooks could be reconstructed as HOTS questions. HOTS problem reconstruction can be achieved by changing the problem in such a way that it does not have a single solution, using a variety of mathematical concepts and other knowledge.
Scaffolding worksheets as a medium of student learning during the COVID-19 pandemic in constructing proof of group problems
Authors: Warli  , Rahayu P , Cintamulya I 
Published: March 2021

AbstractStudents have many difficulties in constructing proof of the statement, plus the Covid-19 pandemic conditions, students study at home. For that, we need media that help the student’s difficulties in constructing proof while studying at home. This study aims to describe the ability of students during the Covid-19 pandemic in constructing proof of group problems, after being given the media scaffolding worksheets. The trial was conducted online, after learning the exercises were given evidentiary problems through scaffolding worksheets with the topic Group. To find out the ability to construct a proof, test, and interview are given based on the student’s proof answers. Interview guidelines are prepared to refer to indicators of construction proof. For this reason, this research is qualitative descriptive research. The research subjects were students of Unirow Tuban Mathematics education who took the Algebra Structure course. The design of scaffolding worksheets refers to the mapping of construction evidence indicators, and the level of scaffolding developed by [32]. The results showed that the ability of students in the initial steps of proof, proof of flow, using related concepts, the argument of proof, and the language of proof had very good improvement. So the ability of students to prove group problems after using scaffolding worksheets increased.
The development of online interactive learning media by using google classroom assisted by geogebra software on the quadratic function material
Authors: Monalisa L A , Susanto  , Fatahillah A , Prihandini R M , Hussen S , Fajri E D R 
Published: March 2021

Abstract
Technological developments are currently entering the industrial revolution 4.0 where everything is digital based. Learning media are tools used by educators in carrying out learning activities. One of the learning media that can be applied in learning mathematics is GeoGebra software. However, the GeoGebra software does not interact between educators and students, so we need a Google Classroom to improve interactive learning that can be combined with GeoGebra Online. The process of developing interactive online learning media using Google Classroom were assisted by GeoGebra software on quadratic function material used the Thiagarajan development model which consisted of four stages, namely define, design, development and dissemination. The results of learning media validation fulfilled the validity criteria with a correlation coefficient based on the validation sheet of 0.92 which is included in the valid category with a very high interpretation. Practical criteria with a percentage of the average value of the user response questionnaire based on a user response questionnaire of 91.75% which is included in the practical category with a good percentage. The effectiveness criteria with the percentage of learning outcomes based on the learning outcomes test was 82.61% which is included in the effective category with a very good percentage. The development of instructional media tested at SMA Muhammadiyah 3 Jember has fulfilled three criteria, namely valid, practical and effective.
Experience in Retrofitting the Mineral Processing Equipment to Intensify the Gravity Recovery of Gold
Authors: Semenova L A , Shaldybin D A , Semenov D S 
Published: March 2021

Abstract
The experience of replacing a Knelson concentrator with MOD 2 and MOD 3 jigs at the gold recovery plant of the Karalveem deposit is described. Due to the change in the source product quality (an increase in the amount of finely disseminated gold from 17 to 75 % of the total gold obtained), the Knelson concentrator performance at stages 4 and 5 was unsatisfactory. It was decided to retrofit the equipment and replace the Knelson concentrator with the MOD 2 and MOD 3 jigs. The gold in the Karalveem deposit ore was briefly characterized by size as fine, dust, and medium-round gold, and the mineral composition of the Karalveem deposit ore samples considered. Statistically significant results of testing before and after retrofitting (replacing the Knelson concentrator with MOD 2 and MOD 3 jigs) have been represented. The efficiency of the MOD type jig installation has been evaluated. The authors have concluded that industrial testing the recovery of fine, dust, and medium-round gold on the MOD type jigs can be performed at any mine to process this type of ores, and these jigs may compete with Knelson concentrators that have already gained popularity.
Solution of Problems to Ensure Road Safety by Means of Intelligent Transport Systems
Authors: Vasilchenkova D G 
Published: March 2021

Abstract
The article is devoted to intelligent transport systems based on short-range radio technology (DSRC). The main feature of this type of system is the ability to provide communication between vehicles without the direct involvement of drivers and without access to the global network. This allows to solve a number of problems related mainly to road safety. This article is about collision prediction and the detection of dangerous driving elements. For these problems, mathematical models of their solution are given, a description of the basic terms of the proposed algorithms, and the results of simulation experiments delivered using the traffic simulator Simulation of Urban Mobility are presented. The model for prediction of vehicle collisions is based on methods for approximating vehicle trajectories and their pairwise comparison. The detection of dangerous driving elements is based on the statistical processing of a number of vehicle motion parameters in the visibility range of the such DSRC device.
Solid Municipal Waste Management Through Social and Environmental Mapping
Authors: Prelikova E A , Zotov V V , Karjakina P M 
Published: March 2021

Abstract
When considering environmental safety issues, much attention is paid to problems related to the management of solid municipal waste in courtyards and landfills. One of the most effective ways to reduce the environmental burden on the environment is to collect waste separately. The relevance of the research topic and the degree of its scientific development give rise to the formulation of a scientific problem as a contradiction between the need for waste management and lack of public awareness of the features of the separate collection system and its absence in residential areas. Solid municipal waste management is based on socio-ecological mapping, which provides an adequate reflection of the environmental situation. The authors have developed a map of equipped sites for separate waste collection on the example of the city of Kursk, which allows you to get information about garbage collection sites both for the city as a whole and for individual neighborhoods.
Highly Effective Fire Extinguishing Mixtures of Iodinated and Fluorinated Hydrocarbons as a Way to Reduce Greenhouse Gas Emissions into the Atmosphere
Authors: Kopylov S N , Kopylov P S , Eltyshev I P , Kopylov N P , Begishev I R 
Published: March 2021

Abstract
One of possible ways to reduce the volume of the use of hydrofluorocarbons (HFCs) as gaseous fire suppressants is studied in the paper. Extinguishing mixtures of HFCs and some fluoroiodocarbons are investigated. It is theoretically predicted that fluoroiodohydrocarbons are effective inhibitors of conversion of fluorinated alkanes in a flame. Special experimental equipment allowing to measure fire extinguishing concentration of gaseous fire suppressant having high boiling point is described. Experiments show that fluoroiodohydrocarbons are effective means of reducing the use of gaseous fire extinguishing agents based on fluorinated alkanes, which are greenhouse gases: in the presence of insignificant addition of iodized substance the volume of fluorinated alkanes required for the extinguishing decreases several times. Creation of mixtures with the content of iodized components higher than 5 mass. is impractical because in this case the iodine-containing substance will exceed safe level of its use from the point of view of toxicity
Safe Operation of All-Wheel Drive Articulated Dump Trucks on Large Slopes in Deep Open-Pit Mines
Authors: Glebov A V 
Published: March 2021

Abstract
The analysis have been carried out for the production of all-wheel drive articulated dump trucks. The practical experience of operation of dump trucks as open-pit transport has been analyzed. The paper describes the technical characteristics of some models of articulated dump trucks of Russian and Belarusian production. The paper describes the examples of transportation of rock mass at enterprises of Russia and abroad. The paper points up the special aspects for making the organizational, technological and design decisions in the implementation of articulated dump trucks. The paper shows the experience of operation of all-wheel drive articulated dump trucks in open-pit mining. It has been established that articulated dump trucks allow to increase the efficiency of mine development at the stage of construction and commissioning of mining and processing plants, especially in geographically remote and inaccessible territories The measures have been developed for safe operation of all-wheel drive articulated dump trucks in open-pit mining at the development of deep-seated mineral deposits.To implement the program of import substitution of all-wheel drive articulated dump trucks it is necessary to perform market research to study the possible market of consumption of vehicles of this class at open-pit mining operations in order to justify the prospects for provision of the Russian production market.
Studying Noise Pollution in Vladivostok
Authors: Ugay S M , Kaminskiy N S , Permyakova O G , Ovsyuk M A 
Published: March 2021

Abstract
The issue of the growing harmful impact of traffic noise on city residents has been relevant for years. Today, protecting the population from exposure to increased noise is essential. Residents of cities are more susceptible to noise. The study objective is to assess the degree of traffic noise impact on the population of Vladivostok. The data obtained will allow identifying the most acoustically unfavorable areas for further research to plan specific noise-reducing measures.
Hydrate Modeling Filtration of Salt Liquid-Ice Solutions and Gas Mixtures with Splitting by Physical Processes
Authors: Alekseeva N Yu , Podryga V O , Poveshchenko Yu A , Rahimly P I , Rahimly O R 
Published: March 2021

Abstract
The filtration model of the hydrate-equilibrium zone (HEZ) in the mixture of liquid-ice solutions and gas with possible solid-phase salt sedimentary inclusions in a porous medium is studied. Various types of saturating the liquid-ice mixture with gas and salt, as well as salt sediment in HEZ in the absence of a liquid phase are considered. Based on the Gibbs phase rule, various types of dissociative bonds between thermodynamic variables in the problems under consideration are determined for systems with one thermodynamic degree of freedom.
Comprehensive Methodology for Choosing a Rational Route for Road Transport When Transporting Dangerous Goods
Authors: Kuzmin A V , Gorina L N , Demin A 
Published: March 2021

Abstract
The General trend in the development of the technosphere implies a constant increase in the volume of transport of dangerous goods by road. The combination of "dangerous cargo and vehicle" is potentially dangerous because it can pose additional risks to road users, as well as to the environment (nature and population). For this reason, it is necessary to conduct appropriate risk analyses for the transport of dangerous goods by road, which makes it possible to assess such risks.
Improvement of Textile Waste Sorting Processes
Authors: Girfanova L R , Abdyrasulova R R 
Published: March 2021

Abstract
The transition to digital technologies in industry allows to streamline the processes of production, operation, disposal and processing of products. The recycling and management of raw materials is an important issue for textile industries and is receiving increasing attention. For mechanization and automation of waste sorting, the article proposes an aggregate, and for removal of zippers from clothing - an installation, the use of which allows to reduce their volume of textile waste in landfills, reduce their negative impact on the environment and use as secondary raw materials.
Heavy Metal Contamination of Urban Soil in Novosibirsk
Authors: Storozhko I , Krasovskaya A , Udal’tsov E 
Published: March 2021

Abstract
This paper focuses on the problem of urban soil contamination with heavy metals in Novosibirsk city. The concentrations of mobile forms of heavy metals in soils of district of Novosibirsk affected by a non-ferrous metallurgy plant (Novosibirsk Tin Plant) were assessed. Soil samples were taken at 9 sites. Flame atomic absorption spectrometry and inductively coupled plasma mass spectrometry were employed for chemical analysis of the heavy metal contents. The study demonstrated that the maximum permissible concentrations (MPCs) for arsenic, lead, nickel, cadmium, copper, zinc and chromium were exceeded in the analysed samples and the concentration of mercury is in normal levels. The concentration of heavy metals decreased with increasing distance from the plant. According to the integrated pollution index soil contamination is classified as extremely hazardous.
The Study of Slip at the Surface in Terms of Carbon Dust
Authors: Shabelskaya N , Polyakova Y , Vyaltsev A 
Published: March 2021

Abstract
In this paper, an experimental study of the dependence of the coefficient of friction in the "sole-floor" system under various conditions is carried out. During the test, a tile was used as a support surface. Part of the sole of a special Shoe was placed on a tile and, slowly lifting the tile, determined the angle at which the movement of the Shoe sample begins. The sole and surface of the tile were specially prepared: cleaned before testing or applied a layer of graphite, rubbing into the surface. The studies were performed under various conditions: a clean Shoe sample and a clean surface, a Shoe sample and a surface contaminated with graphite dust. A graphite electrode powder with a grain size of no more than 0.1 mm was used as graphite dust. Graphite was applied to the tile surface in the form of a loose layer, or with a small seal. Analysis of the results shows that the highest coefficient of friction occurs between a clean Shoe sample and a clean floor surface, which is difficult to achieve in real production conditions. This combination is the safest in production conditions. The lowest coefficient of friction is obtained when a Shoe sample contaminated with graphite slides when there is a loose layer of graphite on the floor surface. This leads to the conclusion that it is necessary to clean the floor surface and shoes from carbon dust to ensure a safer environment for production workers in the presence of carbon-containing dust in the air of the working area. The results obtained can be useful for developing recommendations on the organization of safe working conditions at enterprises associated with the processing of carbon-containing materials.
Development of Functional Food Technology for Food Security in the Regional Aspect
Authors: Skripko O V , Bodrug N S 
Published: March 2021

Abstract
Ensuring food security is one of the main tasks of the state. The food security doctrine approved by the President of the Russian Federation, among other tasks, provides for the production of high-quality and safe food products that are accessible to all segments of the population and can support the health of consumers. Achieving food security in the far Eastern region is possible through the use of regional sources of agricultural and wild-growing raw materials. For the production of functional beverages, soy whey is used, obtained in the production of tofu from safe, non-genetically modified soy, pumpkin, carrots, cranberries and blueberries. The inclusion of these components in the recipe makes it possible to obtain drinks with a rich chemical composition, containing soluble protein fractions, a small amount of fat, carbohydrates, including dietary fibers (pectin substances) that have probiotic properties, minerals and physiologically functional ingredients (α-carotene, vitamins C, E, lycopene and succinic acid) and high organoleptic indicators. Soft drinks obtained by the developed technology can be classified as healthy food products.
Development of a Method of Luminescent Analysis of Grain Products Grinding Degree
Authors: Kulikova M G , Belyakov M V , Samarin M D 
Published: March 2021

Abstract
The aim of this work is to develop a luminescent method for assessing the quality of grinding of grain processing products. In the course of the study, we studied luminescent characteristics of peas and lentils, as well as their grinding on a spectrofluorimeter. The spectra were measured by means of a synchronous scanning, then were measured excitation and luminescence spectra, which was followed by calculation of integral parameters, namely the excitation energy and the luminescence flux. The excitation spectra of pea grindings have maximums at wavelengths of 288, 362 and 424 nm, and of lentils grindings reach 288, 424 and 530 nm. In the range of 410-470 nm, the dependence of the excitation energy on the grinding diameter is systemic. The dependences of the photoluminescence flux on the average particle diameter can be approximated with sufficient accuracy by means of linear regression models. The express-analysis technique developed on the basis of these models of analysis of the average particle size of the fractions in the grinding includes sample preparation, excitation and registration of photoluminescence, amplification of the received signal, and size determination based on previously obtained calibration curves. The technique can be applied in grain processing and food industries.
Food Supply and Its Security in the North: Regional Aspect
Authors: Tarasov M E , Darbasov V R , Tarasova-Sivtceva O M 
Published: March 2021

Abstract
The article deals with the need to increase the competitiveness of rural areas in the food supply market with local products for the population of the republic. The necessity to strengthen the protectionist economic social policy of the state for the North regions development and create conditions for the effective functioning of the agricultural sector of the economy is justified. We raises the question about necessity to maintain state support and government regulation at both the regional and federal levels in order to ensure employment of the rural population, increase the level of its income, preserve local traditions, and classify agriculture in the Republic of Sakha (Yakutia) as a traditional sector of the North’s economy.
Environmental Impact Assessment of Technogenesis on Genetic Features, Composition and Properties of Light Gray Forest Soils
Authors: Stepanova L P , Pisareva A V , Bolmat T N 
Published: March 2021

Abstract
The paper presents an environmental impact assessment of technogenesis (waste slag from metallurgical production) on the genetic characteristics of light gray forest soils. To study the degree of technogenic impact of the slag dump on the degradation changes in the morphological characteristics and composition of light gray forest soils in the area of action of the slag dump of fines of aluminum casting on the example of a slag dump in the village of Bolshoye Dumchino, Mtsensk district of the Oryol region, field and laboratory studies of soil samples taken at different distances from the slag dump - 20 m, 150 m, 300 m, 450 m. The soil cover of the territory in the area of the slag dump is represented by light gray forest soils, which are characterized by the following typical diagnostic horizons with characteristic morphological features at different distances from the dump. This research aims to establish the degree of anthropogenic transformation of light gray forest soils of agricultural areas, disturbed by the technogenic impact of metallurgical waste. The tasks were solved, as a result of which the influence of the slag dump on the typical diagnostic features of the genetic horizons of light gray forest soils was established. The nature of the change in the aggregate and granulometric composition in the profile of light gray forest soils in the area of influence of the slag dump was studied. An assessment of the degree of degradation changes in the physicochemical properties of light gray forest soils at different distances from the pollution source is given.