bluuebunny/crossref_metadata_2025 huggingface dataset:
The Study of Imaging Methods for Sparse Targets through Walls with Fuzzy Wall Geometry Parameters
Authors: Sun Yanpeng , Sun Lu , Qu Lele
Published: March 2021

Multipath exploitation has been successfully applied in through-the-wall radar imaging given prior knowledge of the room geometry. Actually, the prior information of the walls is generally not known. A Contraposition Subtraction (CONS) algorithm is proposed to solve the problems of poor wall parameter reconstruction accuracy and extremely high initial value requirements of iterative algorithms under fuzzy wall geometry, and the CONS algorithm model is established to solve the problems of high initial value requirements of traditional quasi-Newton algorithms and improved quasi- Newton-particle swarm optimization algorithms. The estimates obtained have large errors and other problems. The CONS algorithm combined with the Block Orthogonal Matching Pursuit (BOMP) algorithm can not only accurately reconstruct the position of the sidewalls, but also reconstruct the moving and stationary targets, which improves the limitations and accuracy of the algorithm to a certain extent. The simulation results and data analysis verify the performance of the proposed method.
Review of Deep Learning Algorithms in Computational biochemistry
Authors: Sino Nezar Ismet , Farhan Rabah N. , Seno Mohammed E.
Published: March 2021

Biochemistry actually is a fertile pool of resources, including modeling, DL and optimization techniques for chemical data and associated phenomena. Computational Biochemistry is a very effective entity. These include rapid literature research, physical and quantum chemical propaganda analyzes, transition states, chemical structures, chemical reactions as well as new catalysts and candidates for drugs. DL algorithms can integrate raw input into intermediary layers of features and successfully fit the desired compound into optimum combinations. This review study introduces a series of biochemical applications with the most exciting discoveries involving the use of DL in wide range of applications such as Modeling bio-processes, algorithms and methods to promote the design and synthesis of bio compounds, material design, binding forecasting and molecular activity are given special importance.
The total dominator coloring of dense, octahedral and queen’s graphs
Authors: Lazuardi A R , Slamin  , Dafik  , Kurniawati E Y , Maylisa I N
Published: March 2021

Let G be a graph, then the dominator coloring of G is a proper coloring, in which every vertex of G dominates every vertex of at least one color class. The Total dominator coloring of graph is a proper coloring with extra property that every vertex in the graph properly dominates an entire color class. The total dominator chromatic number

X
d
t

(
G
)

of G is the minimum number of color classes in a total dominator coloring of it. In this paper, total dominator coloring of dense, octahedral and queen’s graphs have been disscussed.
On resolving efficient domination number of comb product of special graphs
Authors: Hakim R A , Dafik  , Tirta I M , Prihandini R M , Agustin I H
Published: March 2021

Let G be a connected, finite, and undirected graph. A vertex set D in G is an efficient dominating set of G if D is an independent set and for each point υ ∈ V(G)-D is adjacent to precisely one vertex d ∈ D. The representation of points υ ∈ V(G) in respect of an ordered set W = {w
1, w
2,…, wk
} is the k–vector r(υ| W) = (d(υ, w
1), d(υ, w
2),…, d(v, wk
)), which d(u, v) is the distance between the points u and υ. The set W is a resolving set of G if r(u|W) = r(υ| W), for each point u and υ in G. A set of vertices in graph G which is an efficient dominating set and resolving set is called a resolving efficient dominating set. The minimal cardinality of resolving efficient dominating set is called resolving efficient domination number, denoted by γre
(G). The comb product between graph G and graph H is a graph which get from taking a copy of graph G as many vertices of graph H and grafting the i-th copy of graph G to each vertex of H, and its notated by G ▹ H. In this paper, we determine the resolving efficient domination number of comb product graph, namely Kn
▹C
3, Kn
▹P
3, Wn
▹C
3, Wn
▹P
3, and Sn
▹P
2
Analysis of physics concept of newton’s laws on the dadhak merak dance in the reogponorogo cultural arts
Authors: Rahmawati E , Jamalludin  , Sholihah L , Safitri Z A , Handayani R D , Putra P D A
Published: March 2021

Indonesia is a multicultural country with a variety of cultures, one of which is Reog Ponorogo. Reog Ponorogo is a traditional dance passed down from generation to generation as a culture and identity of the Ponorogo society. Unfortunately, many people considered that Reog Ponorogo only as entertainment that does not contain scientific concepts. This research investigates physics concepts, especially Newton’s Law in Dadhak Merak dance of Reog Ponorogo. This research used the content analysis method involving unitizing, sampling, recording, reducing, inferring, and narrating. The result indicated that Newton’s First Law came up in the inertial frame of the Dadhak Merak. Newton’s Second Law is shown in the acceleration changes influenced by the mass and force of Pembarong. Newton’s Third Law is related to the dancer’s reaction force and the ground that raises a lateral force to the Dadhak Merak dance. This research is expected to contribute as a source of information on the development of contextual teaching and learning physics material.
Contribution of Russian Oil and Gas Companies to the Implementation of the Sustainable Development Goal of Combating Climate Change
Authors: Tyaglov S G , Sheveleva A V , Rodionova N D , Guseva T B
Published: March 2021

The paper representing the author’s study of the role of Russian oil and gas companies in combating climate change considers the issue of ensuring sustainable development, which is currently becoming more and more relevant. Using the analysis and synthesis techniques and the analytical and statistical study results, the authors have concluded that the climate change issue is a huge threat to humanity and requires an immediate solution. Oil and gas companies being one of the largest environmental pollution sources should first and foremost take appropriate measures to combat climate change. A systematic approach as the main one has been chosen to study this issue, due to which such diverse elements as sustainable development, the state, and oil and gas companies that have previously been studied separately are considered from a holistic perspective. The paper has proven that the largest Russian oil and gas companies such as Gazprom PJSC, LUKOIL PJSC, and Rosneft OC PJSC recognize the importance of actions to combat climate change and not only include sustainable development goals in their policies and strategies but also implement specific responses to climate change, thereby making a significant contribution to achieving the goal of combating climate change. The paper materials are of practical value for state authorities in terms of improving policies implemented in the field of sustainable development and drawing up regulatory documents and programs. Also, the research results may be considered by oil and gas other industry companies that have not yet passed to more sustainable business development models.
Dibromomethane as Promising Gaseous Fire Extinguishing Substance with Short Atmospheric Lifetime
Authors: Kopylov S N , Kopylov P S , Eltyshev I P , Kopylov N P , Begishev I R
Published: March 2021

Calculation of dibromomethane atmospheric lifetime is carried out, as well as an experimental assessment of its fire extinguishing efficiency. Calculations show that methylene bromide atmospheric lifetime is 15.8 days so it rapidly decomposes in the troposphere. The main mechanisms of the removal of CH2Br2 from the atmosphere are its reaction with hydroxyl radicals and the processes of physical removal from the atmosphere. Special experimental equipment allowing to measure fire extinguishing concentration of gaseous fire suppressant having high boiling point is described. Experimentally measured minimum extinguishing concentration of methylene bromide for n-heptane is 2.5 % vol. According to this, CH2Br2 is close to the most effective gaseous fire extinguishing agents, such as C3F7I and C2F4Br2. LOAEL value for CH2Br2 is predicted at the level of 0.3-0.4 % vol. Due to the high boiling point of methylene bromide and its relatively high toxicity, the most appropriate way to use it in fire suppression is to create fire extinguishing mixtures, in particular, with fluorinated hydrocarbons. This approach allows to diminish application of greenhouse gases in fire protection and also to solve the problem of toxicity of extinguishing substance.
Theoretical and Numerical Analysis of One Euler Two-Layer Completely Conservative Difference Scheme of Gas Dynamics with Adaptive Viscosity
Authors: Rahimly O R , Poveshchenko Yu A , Podryga V O , Rahimly P I
Published: March 2021

For the equations of gas dynamics in Euler variables, using the operator approach, a family of two-layer in time completely conservative difference schemes (CCDS) with space-profiled weight factors used to approximate the momentum and energy fluxes in time is constructed, theoretically and numerically studied. The schemes have second-order accuracy and are implemented using simple iterative processes. A class of divergent adaptive viscosities for these CCDS is developed and a theoretical analysis of their stability is carried out. The regularization of flux terms of the gas dynamics equations with the help of adaptive artificial viscosity is proposed and, using the example of well-known Einfeld problem, is numerically investigated. This regularization effectively eliminates nonphysical oscillations of the solution, entropy peaks and preserves the property of complete conservatism of schemes of this class.
Reducing the Vulnerability of Critical Facilities by Improving the Protection of their Critical Elements from Terrorist Attacks
Authors: Dubinin E F , Kuksova V I
Published: March 2021

The vulnerability of a critical facility depends to a large extent on the protection of its critical elements (structural or technological). Their failure leads to termination of normal functioning of facility or to emergency situations. Therefore, first of all, it is necessary to identify critical elements and analyze their vulnerability with regard to the most probable spectrum of terrorism-related threats, determined on the basis of scenario analysis taking into account new methods of technological terrorism. It is useful to divide critical elements into categories in accordance with physicochemical processes taking place in them and design features. The results of vulnerability analysis and identification of critical elements to be additionally protected are the initial data for improving the facility’s protection system. The decision as to whether additional costs should be incurred to ensure security of facility is made on the basis of a quantitative assessment of the ratio of corresponding costs, risks and losses.
Studies of Oil Viscosity Under the Influence of Thermal and Electromagnetic Fields
Authors: Kosianov P M
Published: March 2021

This article presents the results of theoretical and experimental studies of the dependence of oil viscosity on various physical parameters. Thus, the influence of thermal and electromagnetic fields on the reduction of oil viscosity is considered. The dependences of oil viscosity on temperature, electromagnetic field strength, frequency and shape of the alternating field are determined. The way to increase oil production by integrating various physical methods is shown.
Research of the Rate of Changing the Mine Suspended Monorail Brakeforce When Braking
Authors: Ignatkina E L , Kostenko A V , Tsarenko S N
Published: March 2021

A technique to determine the rate of increase in brakeforce developed by the braking device of a mine suspended monorail is proposed. Based on the experimental study, the results of the analysis of the rate of change in the brakeforces developed by the brake shoes are given.
Industrial Technology Facilitation for the Dredging of Highland Placers
Authors: Kostromin M V , Yakimov A A
Published: March 2021

As the reserves of alluvial placers in river valleys are getting depleted, the importance of highland placers increases. In some cases, it is possible to use dredging for their development. Dredging is successfully applied to develop a highland placer of the Yakh- Suyskoye deposit located in northwestern Pamir at the altitude of 2000 m or more. A 380-liter dredge is used there. This deposit faces specific problems. They include steep slopes and narrowness of the valley, unevenness of the placer bedrock with lots of sharp bumps and dips, lots of boulders and dredging waste in the placer, adverse hydrogeological conditions that hamper the development and the maintenance of the water level. Due to this, the dredge operated in the semi-bank mode. Besides, the dredge aft was regularly displaced to dispel dredging wastes, which decreased the dredge performance while not being able to eliminate the bottom break hazard and the accumulation of dredging wastes in the pontoon. All of the above calls for the development of a new placer development technology that would prevent negative impacts. Based on the previous research, we developed and introduced a placer development technology stipulating the increase of the water level by 7 m. To this end, we constructed a dam on the waste piles below the dredge. The dam was 10 m high and 120 m wide. Since the permeability coefficient of the river Safet-Dora rocks is 75-80 m/day and that of the dredging waste piles is 500 m/day, the dam was equipped with polyethylene film sealing screens. This new dredging technology with a 7.5 m water level increase allowed us to process the site in one bank; eliminate the accumulation of dredging wastes at the pontoon aft and the risk of pontoon breakage on the bedrock bumps; increase the dredge operation time by 1.3 h/day; prevent river pollution; acquire significant economic benefits. Thus, we developed and introduced a relatively simple and efficient dredging technology for highland placers, which can be recommended for further use.
Assessment of Self-Cleaning from Heavy Metal Contamination of the European Territory of Russia Northern River Ecosystem
Authors: Zimovets A A , Ovsepyan A E
Published: March 2021

Self-purification from heavy metals (Cu, Ni, Pb, Zn, Cd and Cr) was assessed in the estuary area of the one of the largest river ecosystems in the European territory of Russia – the Northern Dvina River estuary. The conditional degree of self-purification of river waters and bottom sediments for winter and summer is calculated. It is noted that the highest values of self-purification of river waters are observed in winter for Cu (54%), Pb (25%), Cd (67%), Cr (82%), and in summer – Zn (44%) and Ni (50%). It was found that the processes of migration of Ni, Zn and Pb from bottom sediments to water predominate in winter, while in summer this process is typical for Pb, Cd and Cu. The index of river water pollution in the seasonal dynamics of heavy metal content was established.
Information Analytical Calculation and Construction of Dispersion Maps of Pollutants in the Surface Layer of the Atmosphere at a Specialized Facility
Authors: Kulneva V V , Zvyagintseva A V , Sazonova S A
Published: March 2021

We carried out an environmental audit on the territory of a specialized facility of all sources of environmental pollution and, accordingly, we measured the concentration of polluting components embodied in the atmospheric background. As a result of the inventory of emission sources, we recorded the following picture for the total emissions of pollutants into the air zone of the facility: 1.647832 t/year, including 1.597435 t/year in the liquid and gaseous state, and 0.050397 t/year in the solid state. We present the calculation of pollution from generators of emissions of the air zone of the facility, which is recorded on the basis of the Unified Atmospheric Pollution Calculation Program (UAPCP) “Ecolog” (version 3.0). According to the feasibility study, the dispersion calculation was recognized as socially effective for site 2 (hangar) - for NO2, NO, kerosene, CO, SO2, and abrasive dust. We calculated the surface concentrations of harmful substances in the atmosphere and constructed dispersion maps for the object for the winter period. The implemented research showed that the accumulation of contaminants does not reach the standard values of concentrations at key points suitable for determination at the boundary of the sanitary protection zone and the residential area. The dispersion calculation indicators showed that the predominant fraction of all diffusing contaminants for the hangar in the sanitary protection zone is NO2 0.82 parts of the maximum permissible concentration with and without background 0.697, and in the residential area, 0.11 parts of MPC without background.
The Stabilization Ensuring of the Underground Pipelines Design State in the Permafrost Conditions
Authors: Kozhaeva K V , Akchurina E A
Published: March 2021

The article considers one of the possible options for improving the technology of construction of underground pipelines in conditions of permafrost soils, which today is very relevant. The most significant disadvantages of the existing methods of underground laying of pipelines on permafrost soils are the thermal and mechanical impact of the pipeline on the soil base during operation and the occurrence of unacceptable plastic deformations of the pipeline. The purpose of the studies is to prevent or minimize the thermal impact of the pipeline on MMG during operation, and as a result, to ensure stabilization of the design position of the pipeline by preventing unacceptable plastic deformation of the pipeline. The main tasks solved in research: develop a method of laying an underground pipeline that eliminates thermal impact on the containing frozen soil; simulate the underground pipeline laying structure and calculate stress-strain state in the ANSYS software complex, as well as forecast calculation of thermal interaction of the structure on frozen soil in the FROST 3D Universal software complex.
Prediction of the Viscosity of Liquid Petroleum Products
Authors: Grigoriev B , Boldyrev D , Koldaev A
Published: March 2021

The article deals with the new technique for predicting the viscosity of liquid petroleum products, which differ significantly in physicochemical properties and fractional composition, in a wide range of state parameters. No specific information is used to predict viscosity other than molar mass, average volume boiling point, and relative density at 20 °C. It is shown that the deviation of the predicted values from the experimental data is comparable to the error of the viscosity measurement. Methods for correcting the calculation results using limited experimental information are proposed. The application of the developed method is advisable in conditions of a lack of empirical information about the petroleum products viscosity. Keywords: viscosity prediction; petroleum products; petroleum fractions.
Problems of Maintaining of Real Estate Cadastre as Exemplified by Cadastral Registration of Allotment Cottages
Authors: Ershova N V , Kharitonov A A , Vikin S S
Published: March 2021

Gardening is traditionally widespread in Russia. As of 2018, there were 180,612 allotment gardens in Voronezh Oblast. The area of land of horticultural non-commercial associations of citizens that were objects of agricultural census was 19563.8 hectares. The field of cadastral registration of buildings on allotment garden plots certainly inherits the general problems of maintaining the real estate register. In this area there are also problems associated with the difficulties of classifying real estate objects within cadastral registration and problems of reliability and completeness of information contained in the Unified State Register of Immovable Property (EGRN), as well as problems related to updating the EGRN data and correcting errors of various origins. The notion of allotment garden plot, as well as allotment cottage, has changed several times in recent decades. The latest changes in the status of allotment cottages occurred in 2019, so the evolution of the notion of allotment cottage may not be complete yet. At the same time, the problems of classifying real estate objects are also relevant in the field of cadastral registration of allotment cottages, since errors in the classification of real estate objects are one of the factors in the emergence of register errors and consequent input of inaccurate information in the EGRN. Thus, the issues of classifying real estate objects in the case of buildings located on allotment garden plots are of particular relevance. The solution of these issues directly determines whether this object is subject to cadastral registration and influences the calculation of cadastral value of the building. At the same time, in the particular case of allotment cottages the line between different classification groups in regulatory legal acts is blurred, which complicates the cadastral registration procedure.
Mathematical Description of the Process of Adsorption of Metal Ions by Modified Zeolites in Adsorbers with a Fixed Adsorbent Layer
Authors: Obuzdina M V , Rush E A , Gozbenko V E
Published: March 2021

The solution of the problem of mathematical description of the processes occurring directly in the adsorber apparatus with a fixed layer of the solid phase and comparisons of the results with known classical representations is presented. The following characteristics were calculated: equivalent particle diameter of the sorbent, permissible fictitious velocity of wastewater, adsorber diameter, hydraulic resistance, Reynolds criterion, Prandtl test, Nusselt mass transfer criterion, external and internal mass transfer coefficients, mass transfer coefficients (including taking into account longitudinal mixing), general number of transfer units. The calculation was made taking into account that in the adsorber under consideration the fixed layers of adsopbent are located on cassettes, the distance between which is 0.01 m, which affects some characteristics of the adsorber apparatus with a fixed layer of a solid phase (modified zeolite).
Evaluation of Urban Microclimate Parameters as Indicators of Pedestrian Ways Environmental Comfort
Authors: Pilipenko O , Skobeleva E , Bulgakov A
Published: March 2021

A variant of the methodology for quantitatively assessing the availability, comfort and environmental safety of residential areas was proposed by the authors. The principles of creating a biosphere-compatible city, without conflict with the environment and developing a person, were taken as a basis. According to the main provisions of this concept, the degree of implementation of the city’s functions is determined by the level of accessibility of these functions for all of its residents, regardless of the characteristics of their health and age. It is proposed to introduce the parameter of time to meet human needs into the system of indicators of master plans as one of the parameters of a comfortable and safe urban environment. It is supposed that socially significant objects of everyday service of residents, as well as open spaces for recreation, should be located on the territory of residential buildings within walking distance at a comfortable distance from the places of residence. At the same time, pedestrian communications in residential areas, in particular those leading from places of residence to the objects under consideration, must comply with environmental safety requirements, as well as open urban spaces for recreation, games, and sport. To assess these parameters an integral indicator, one of the components of which is the predicted level of thermal comfort, was proposed in the work. To determine it, it is proposed to use the bioclimatic index, that is the physiological equivalent temperature (PET). In this work, based on the example of a new residential area in the city of Orel, the corresponding integral indicators were determined in terms of assessing the availability of educational facilities and open green urban spaces, including some points of pedestrian communications. The calculation results showed that when planning a new micro-district, the values of the levels of implementation of city functions in terms of the accessibility of socially significant objects, as well as the levels of comfort and environmental safety of pedestrian communications and open urban spaces, differ significantly from the maximum possible. It is noted that when designing a micro-district and arranging pedestrian communications and open spaces, no attention was paid to ensuring a comfortable climatic regime. Conclusions about the influence of built environment on the temperature regime in the territories of the considered locations are made. It is supposed that expanding the range of indicators for assessing territorial planning projects for analyzing accessibility by time parameter, as well as for assessing the level of environmental safety and comfort, will increase the efficiency of the use of urban planning methods in the planning and development of residential micro-districts in order to create an urban environment that contributes to the preservation of health of residents.
Digital Technologies Use for Data Processing of Farmland Condition and Use
Authors: Strekalovskaya M I , Efremova I I
Published: March 2021

The article considers the issues of digital technologies introduction in the farmland monitoring system. United information system should connect lands database from different sources and became a platform for the analysis of land use and making effective management decisions. Authors develop an agriculture digitalization model and note a key role of primary acquisition including agriculturally used areas data. The article conducted an analysis of farmland parcel capture in the territory of the Republic of Sakha (Yakutia) of the Russian Federation. The main concern issues were highlighted and activities to remedy them were proposed for establishing a farmland informative platform.
Improving the Efficiency and Transportation of High- Viscosity Oils by Emulsification and Creating a Coaxial Flow
Authors: Velichko E I , Polyakov A V , Dubov V V , Prikhodko M G
Published: March 2021

Currently, high-viscosity oil fields are actively developed in the world. This is due to the depletion of world reserves of light oils and a significant resource of heavy high-viscosity oils. The viscous oil production requires a solution to the issue of its transportation, which becomes much more complicated. This is determined by greatly increasing pressure loss due to hydraulic resistance when pumping heavy oil. To reduce the loss of the head, the pumped oil viscosity should be decreased. The paper considers improving the efficiency and transportation of high-viscosity oil by emulsification and creating a coaxial flow.
Evaluation of Possibility of Producing Road Bitumen in Cameroon
Authors: Ondigui Messi E , Bikwe J J , Mascarenhas D S G A , Chekushina T V
Published: March 2021

This article, which deals with Technologies for integrated processing of mineral raw materials to produce new generation materials, was compiled in order to identify opportunities to obtain refined petroleum products such as "bitumen" in demand in Cameroon after the destruction of part of the SONARA oil refining company by fire. During our research, we carried out an on-site inspection of the refinery processing equipment and the refinery infrastructure for the purpose of technical expertise, modernization and the potential configuration of bitumen production at the aid for installations and infrastructure at the SONARA oil refinery. As a result of this destruction by fire of a part of the SONARA oil refinery, refining of petroleum and petroleum products is not currently underway. Surviving units are temporarily closed. The production facilities are monitored, visited and examined. The pressure in the containers is checked, Judging by the nature of the debris, especially the piping and processing equipment, it is necessary to completely remove the damaged equipment, build new units and adapt them with the few units saved in order to refine and produce new petroleum products.
Connectivity between Petrophysical Parameters and Hydrodynamic Activity in Achikulak Oil Field
Authors: Bikwe J J , Ondigui Messi E , Mascarenhas D S G A , Strakhov P N
Published: March 2021

Researches on structure of detrital part of sedimentary rock, particularly granulometric composition of rocks give not only information about restoration of their condition of deposition, duration, direction and transfer ranges, but also for some reconstructions of demolition’s areas, in particular to fixe concern about structure of rocks in areas of sedimentation, and sometimes partially on the climate. Therefore, considering connectivity of petrophysical parameters specially porosity and permeability of rocks with hydrodynamic activity of layer of lower Cretaceous deposits in order to describe formation of reservoir rocks, condition of sedimentation, formation recoveries, sequences of changes and fluid traps bring us to lead subsequently these types of work in one of the Achikulak oil fields and determine future movements, settlements and sand body of the reservoir. The change of lithological structure of rocks by section, maybe define conditions of sedimentation on Achikulak deposits field, it is known that the initial signs that are stable over time are studied in the lithofacial analysis.
Preservation of the Biological Diversity of an Industrial City
Authors: Vasilevskaya N V , Petrova N V
Published: March 2021

Study of the taxonomic diversity of the native flora in the green plantations of the industrial city of Monchegorsk. Large areas of the northern taiga have been preserved in the forest parks. Among the native flora the most common are trees, shrubs and dwarf shrubs (68%). Coniferous are dominated (Pinus friesiana, Picea obovata). Deciduous tree species are represented by birch trees: (Betula czerepanovii, B. pubescens), willows (Salix caprea, S.glauca), rowan (Sorbus gorodkovii). Due to the advantageous location of Monchegorsk relative to the "Severonickel" plant, it is possible to preserve the natural flora within the city.
Challenges for the Arctic Technosphere Safety: Specific Hazardscaused by Grounding the Super-Weight Gravitational Platforms on a Subaqual Permafrost
Authors: Vinogradov A N , Tsukerman V A
Published: March 2021

The especial feature of high-latitude productive fields on the Arctic shelves is unusual geodynamic regime of the subaqual frozen bases enriched by methane gas-hydrates.Permafrost layersinto bottom sediments had been formed during the Ice Age, and after deglaciation the both permafrost and gas-hydrates came in a stage of instability and destruction, accompanying by hazardous effect on the man-made technosphere objects.Since 1937 constructing rules in the Russian permafrost areas were based on the 4-phase model of frozen soils: “mineral matrix – water – ice – gas” (MWIG), but new data on a distribution and structure of the relict subaqual permafrost on the icy shelves revealed an abundance of the new 5-phase type of frozen soils, named as SSGH – “Frozen Soil Saturated by Methane Gas-Hydrates” Preliminary assessment of potential risks for megascale constructions, which would be installed on the shelves, is presented in the article. It is shown that lack of sufficient scientific knowledge about geomechanical behavior SSGH when they serve as a ground base for extra-large engineering facilities. Evidently that fluidodynamic processes, associated with SSGH response ona technogenic stress or climate variations, have to be in a focus of engineering exploration into developing areas, and so the permanent geophysical monitoring during oil and gas field recovering on the Arctic shelveshas to be appointed as the obligatory requirements for large developing projects.
Quality and Processing Behavior of the Megezhek Breed Horsemeat
Authors: Vasiliev S S , Gogoleva P A , Stepanov K M
Published: March 2021

The paper represents the results of studying the chemical composition, processing behavior, and safety of the Megezhek breed horsemeat. It has been found that the Megezhek breed horsemeat has a high nutritional value and good processing indicators.
Creating Functional Food Products from the Domestic Reindeer Breeding Produce
Authors: Stepanov K M , Rumyantseva T D
Published: March 2021

as a result of the research, medical-biological and technological requirements for the composition, nutritional value and safety of products based on raw materials produced through domestic reindeer husbandry are formulated. The technological scheme of the production has been developed. Using the results of the research, technical documentation for production was developed, and prototypes were obtained.
Veterinary and Sanitary Assessment and Commodity Characteristics of Hare Meat (Lepus Timidus) in the Central Zone of Yakutia
Authors: Tatarinova Z , Savvinova M , Struchkov N
Published: March 2021

In the modern world, providing the population with high-quality food is a step of paramount importance which aims to protect the interests of consumers at the current stage of development of society. One of the main provisions of the concept of state policy in the field of healthy nutrition of Russia is providing the population with high-quality nutritient products. One of the promising sectors of the livestock section is wild animal business. Hare meat is a product with good gastronomic qualities, which, in addition, has medical property. It has great biological value, high absorption, energy-restricted and hypoallergenic this is ground for recommending hare meat to elderly people, children, pregnant and lactating mothers. To determine the organoleptic, physico-chemical, microbiological, chemical-toxicological parameters, microscopy of smear-fingerprints, determine the parasitic purity, we conducted laboratory studies of hare meat samples obtained in the Central zone of Yakutia for compliance with regulatory requirements.

The objective of the study is to give the veterinary and sanitary assessment and commodity characteristics of hare meat in the conditions of the Central zone of Yakutia. To achieve the goal were established the following tasks: to study the organoleptic and physico-chemical parameters of hare meat (Lepus timidus) of the Central zone of Yakutia on conformity with the requirements; to conduct a microbiological study in accordance with safety requirements: determining the number of KMAFAnM, the presence of BGKP, the detection of pathogenic microorganisms including salmonella; to conduct a parasitological study of hare carcasses for the presence of maggots and worm eggs; to determine the content of toxic elements in hare meat. The study has established organoleptic, physico-chemical, microbiological, bacterioscopic, chemical-toxicological and parasitological indicators of the quality of hare meat and determined its safety.
Device for Research of Water Flow Dynamics in Situ Based on the PIV Method
Authors: Antonenkov D A
Published: March 2021

The article discusses a developed device designed to study the dynamics of water flow, based on the use of the PIV method. The device block diagram is shown, the principle of its operation is given. The experiments performing technique using the developed device is described. The results of field tests are considered. The created meter makes it possible to carry out full-scale measurements of the current velocity and to obtain data on the dynamics of the water flow with velocity amplitudes up to 2 m/s.
Comparison of Ejection Plant Variants Under Conditions of Natural Gas Pumping Pressure Reduction
Authors: Buranshin A R , Godovskiy D A , Tokarev A P
Published: March 2021

In the process of gas main transportation, repair work is periodically required with cutting off the extended section and emptying the internal cavity of the pipeline. According to the established practice, gas from the cut-off section is released into the atmosphere. Ejectors may be involved in gas scavenging, but due to pressure reduction in the cut-off area, it is necessary to ensure high efficiency of the gas ejection unit. It is proposed to compare different configurations of ejectors at reduction of pumping gas pressure (single-stage ejector, ejector with inner cone, two-stage ejector). The ejector parameters are defined using the ANSYS Fluent CFD package. For each version of ejection unit, a graph is drawn on the dependence of the intake gas flow rate on the intake gas pressure, the inner cone position in the nozzle and the active gas pressure in the first stage of the ejector.
Lithological Features and Conditions for the Development of Salt-Containing Rocks in Oil Reservoirs of the East Siberian Province
Authors: Ilzit E V
Published: March 2021

Along with the identification of oil and gas deposits, studying the physical and mechanical properties, lithological and mineralogical composition, reservoir properties of rocks, and investigating the correlation between capacitive properties and field-geophysical parameters of productive horizons are most important tasks of prospecting and exploratory drilling. Core description and microscopic analysis of thin sections identified 3 lithotypes of salt-containing rocks composing oil reservoirs and allowed compiling a detailed description of the rock structure and texture, mineralogical and material composition, type of cement, and rock formation conditions.
Multidimensional Classification for Systematization of Fish Processing Equipment
Authors: Saltykov M A , Tkachenko T I
Published: March 2021

The paper dwells upon an approach to classifying fish processing machinery by means of cluster analysis. The classification presented herein helps optimize equipment upgrades and troubleshooting. The goal hereof is to analyze the fish processing machinery present in the market by means of cluster analysis. The paper covers fish dressing machines present in the fish processing market. The research methods include hierarchical cluster analysis, Euclidean distance, intergroup relations, and comparative analysis. SPSS is used to run calculations. The research has produced fish processing machinery clusters distinguished by performance, processable raw materials, and engine power; the research team has also tested a method for multidimensional classification for fish processing machinery analysis. These results are of use in a broad range of production tasks; they will be of interest for fish processing market analysts and machinery designers. Multidimensional classifications can be applied to arrange the production process, including selecting the most optimal equipment from a list of similar units.
Assessment of the Potential of Digital Technologies in the Implementation of Deep Cycles of Grain Products Processing
Authors: Kulikova M G , Belyakov M V
Published: March 2021

Improving the technological component of agro-industrial production through the introduction of digital technologies accelerates the pace of economic growth and contributes to ensuring food security. The adaptation for agriculture of digital technologies already used in various industries is particularly relevant, and their integrated use is more effective. Artificial intelligence systems and, in particular, computer vision have significant prospects for implementation in the production and processing of agricultural products. Computer vision and image processing procedures can be used to control product quality and processing cycles in order to improve the efficiency of production processes. In each processing cycle, it is necessary to control the technological parameters and the quality of the processed raw materials, the results of which affect the duration, the number of operations and the conditions of the processing process. The use of the developed luminescent method to control the moisture content and particle size makes it possible to increase the efficiency of technological processes for processing grain products. The development of an innovative complex for deep processing of grain, as an example of application of new production technologies, is a promising current direction in the development of agricultural production. Increasing production efficiency is based on a significant expansion of the range of finished products, on an increase in the added value of processed products and on a slight decrease in capital costs due to the combination of processes. The increase in the potential for using various end-to-end digital technologies in agro-industrial production is facilitated through their combination and integration into complex systems for digitalization of production, which ensure the development of the agro-industrial complex.
Technological Innovation to Reduce the Negative Environmental Impact of Industrial Wastewater
Authors: Grakova A G , Novikova M A , Borisov A V
Published: March 2021

Rational use of natural resources and protection of water bodies is an actual problem of the modern world. Due to the rapidly developing industry, wastewater which contain high concentrations of suspended substances and organic pollutants is discharged to water bodies in a large volume.

So design improved treatment facilities that ensure high quality of treated water is an important task.

Biomembrane technology is a promising direction in water treatment, providing high efficiency of treatment at minimal cost. Compared to the traditional treatment scheme, it allows you to avoid the use of secondary settling tanks by separating the active sludge from the treated wastewater on the membranes. Due to the very small size of the membrane pores, almost complete removal of suspended substances and microorganisms is achieved. A bioreactor with an external arrangement of the membrane module provides high specific capacity.

The small-bubble aeration system in the aeration tank ensures the maintenance of dissolved oxygen at a concentration of 2-3 mg / l for the correct course of the nitrification and oxidation of organic substances. The combination of biological treatment and membrane separation ensures high operational reliability and durability.

This technology is used in various industries, but it is most widely used in the food and oil refining industries due to the high content of organic pollutants, which are mostly removed by this installation.

The use of biomembrane technology is economically advisable for designing treatment facilities for industrial wastewater treatment from organic pollutants.
Investigation of Changes in Quality Indicators of Agro-Industry Products During
Authors: Novikova M A , Blinov A O , Konchina L V
Published: March 2021

Quality control is an integral part of production process and sales and one of the main means conformity of the products in line with established requirements.

Meat products belong to the category of the most valuable food products. Freezing is a low-temperature preservation method. It provides the development of microbiological processes and a sharp reduction in the rate of enzymatic and physical-chemical reactions sacrificing the quality of the product.

There are some methods for evaluating the quality of meat products. One of the promising methods of complex research in this area is the impedance method. An important property of biological tissues is the dependence of their conductivity and relative permittivity on the current frequency. There is a dependence of frequency on electrical resistance dependency in the same way.

Its electrical characteristics also undergo changes, given that the cellular structure of meat changes during freezing. These changes are caused by the cell membranes destruction. As a result, the conditions for the passage of electrons and ions inside the meat change.

Impedancometry offers a wide range of possibilities for determining the meat freshness, the storage conditions correctness, compliance with technological modes of processing meat raw materials, in particular, the number of freezes that meat raw materials have undergone.

The bioimpedance meter will allow you to set the standard indicators typical for each type of meat, exceeding which would serve as evidence of the unsuitability of meat as a food.
Microbiota and Hydrochemistry of Thermal Groundwaters of the Kuldur Spa (Far East, Russia)
Authors: Lebedeva E G , Kharitonova N A , Chelnokov G A
Published: March 2021

Chemical composition, distribution, structure, and numbers of different physiological groups of bacteria as well as their biodiversity have been researched. It has been shown that thermal waters are alkaline with low-TDS, Na-HCO3 type, and enriched in boron, lithium, arsenic, and strontium. The content of organic carbon in groundwaters from studied wells is low. They show uneven distribution, low diversity, and numbers of physiological groups of bacteria. The most insufficient numbers and the least diverse composition of physiological bacterial groups were registered in the groundwaters of higher temperatures. The study discovered the prevalence of chemolithotrophic thionic bacteria in the community structure, thus indicating the prevailing bacteria-induced oxidation of reduced sulfur compounds in the groundwaters. Silicate, iron- and manganese-reducing microorganisms also prevailed in groundwaters of wells No.3-87 and No.3-51. Low biodiversity of microorganisms with a significant prevalence of Bacillus sp. (50-60%) spore-forming bacteria in the taxonomic structure has been revealed. Thermophilic bacilli mostly included the species of B. flexus, B. licheniformis, B.subtilis, B. cereus, and B. cohnii.
Features of Production and Consumption Waste Management in Russia
Authors: Zakharenko I K , Pukhova M M , Kharchilava K P
Published: March 2021

The analysis of legislative issues of regulation of the sphere of production and consumption waste management is carried out. The problems and shortcomings that reduce the effectiveness of the mechanisms for managing production and consumption waste provided for by current legislation are identified. Features of production and consumption waste management are studied on the basis of analysis of the existing waste management system in the Russian Federation and research of advanced foreign experience. The analysis of the dynamics of the share of waste in the field of mining is carried out. The reasons for the high share of waste generation in the extractive industry are substantiated. It is proved that the steady growth of unauthorized landfills indicates the insufficiency of existing measures and the provisions that need to strengthen existing measures are presented. The main directions that can be considered a priority for the development of the domestic waste management industry are highlighted.
The Concept of the Unmanned Surface Vehicle for the Observation-class ROV
Authors: Tolstonogov A Yu , Kozhushko A E , Chemezov I A , Skalskii D A , Kolomeitsev A Yu
Published: March 2021

Remotely operated underwater vehicles (ROVs) are widely used in underwater operations, from research and survey operations to complex underwater technical and rescue ones. But the connectedness of an ROV and a carrier vessel imposes restrictions on the ROV and vessel’s joint motion. The article aims to present the concept design of an unmanned surface vehicle for an observation-class ROV. The surface vehicle allows breaking wired connections between the carrier vessel and the ROV by a wireless communication system based on Wi-Fi technology. The detailed design of the unmanned surface vehicle and its main systems are presented in the article.