Pub Date : 2019-12-27DOI: 10.37005/1818-0744-2019-3-43-46
S. Osipov, A. V. Tarasenko
The paper proposes the idea of a low-altitude aircraft with a variable wing area in flight. Using computational aerodynamics methods, it is shown that the reduction of the wing area as fuel is generated increases the flight range compared to a traditional aircraft with a constant wing area.
{"title":"AIRCRAFT WITH VARIABLE WING AREA","authors":"S. Osipov, A. V. Tarasenko","doi":"10.37005/1818-0744-2019-3-43-46","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-3-43-46","url":null,"abstract":"The paper proposes the idea of a low-altitude aircraft with a variable wing area in flight. Using computational aerodynamics methods, it is shown that the reduction of the wing area as fuel is generated increases the flight range compared to a traditional aircraft with a constant wing area.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128775121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-27DOI: 10.37005/1818-0744-2019-3-52-57
V. Sadilov, V. Bodnarchuk, M. Avdeev
In the present article, we consider the results of an experimental verification of the elements of the spin-echo setup based on time gradient magnetic fields. The work confirmed the efficiency of the methodology and identified the main problems requiring a special approach for further development and implementation as an experimental setup.
{"title":"A PROTOTYPE OF SPIN-ECHO SMALL ANGLE NEUTRON SCATTERING WITH TIME GRADIENT MAGNETIC FIELDS CONSTRUCTING AT THE IBR-2 REACTOR.","authors":"V. Sadilov, V. Bodnarchuk, M. Avdeev","doi":"10.37005/1818-0744-2019-3-52-57","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-3-52-57","url":null,"abstract":"In the present article, we consider the results of an experimental verification of the elements of the spin-echo setup based on time gradient magnetic fields. The work confirmed the efficiency of the methodology and identified the main problems requiring a special approach for further development and implementation as an experimental setup.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128965461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-27DOI: 10.37005/1818-0744-2019-3-3-8
O. Andreev, A. Trofimov
The paper addresses the issue of insuring the required probability of correct classification of marine objects in low-frequency passive sonar systems. The solution to the issue is sought through the application of methods for the synthesis of neural network classification algorithms using poly-Gaussian probabilistic models (Gaussian mixture models, GMM). It is shown that the use of GMM makes it possible to solve a number of problems specific to the issue; classification algorithms synthesized using mentioned methods can be implemented in the form of neural networks, which in turn can be described in C++/VHDL to create endpoint computing devices or software systems. The results of modeling of synthesized classification algorithms on experimental data are presented; it is demonstrated that such algorithms make it possible to increase the probability of correct classification of marine objects and to satisfy typical requirements for classification systems in low-frequency passive sonar systems.
{"title":"SYNTHESIS OF NEURAL NETWORK ALGORITHMS FOR CLASSIFICATION OF MARINE OBJECTS IN LOW-FREQUENCY PASSIVE SONAR SYSTEMS","authors":"O. Andreev, A. Trofimov","doi":"10.37005/1818-0744-2019-3-3-8","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-3-3-8","url":null,"abstract":"The paper addresses the issue of insuring the required probability of correct classification of marine objects in low-frequency passive sonar systems. The solution to the issue is sought through the application of methods for the synthesis of neural network classification algorithms using poly-Gaussian probabilistic models (Gaussian mixture models, GMM). It is shown that the use of GMM makes it possible to solve a number of problems specific to the issue; classification algorithms synthesized using mentioned methods can be implemented in the form of neural networks, which in turn can be described in C++/VHDL to create endpoint computing devices or software systems. The results of modeling of synthesized classification algorithms on experimental data are presented; it is demonstrated that such algorithms make it possible to increase the probability of correct classification of marine objects and to satisfy typical requirements for classification systems in low-frequency passive sonar systems.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"61 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123793447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-27DOI: 10.37005/1818-0744-2019-3-47-51
D. O. Ponkin, I. Shirikov, E.A. Davydov, S.L. Kolbakhov, N.A. Malyshev, I.N. Zhabin, D. Leushin, A.E. Smirnov, I.N. Eremkina, T. A. Smolyanin, E.S. Matyukhanov, E. A. Butenko
A new technique of distance learning of high school students in engineering disciplines in demand in modern experimental physics is presented. In the learning process, the student in practice solves a set of tasks that correspond to the real problems that arise when conducting modern physical research. For this purpose, an online engineering workshop was developed and implemented, including a modular type laboratory installation, with which it became possible to organize the implementation of various physical experiments using modern methods of a scientific experiment. Users can perform tasks remotely over the Internet, while simultaneously observing the actual process of the installation using a web camera, which provides a certain effect of presence.
{"title":"ONLINE ENGINEERING WORKSHOP","authors":"D. O. Ponkin, I. Shirikov, E.A. Davydov, S.L. Kolbakhov, N.A. Malyshev, I.N. Zhabin, D. Leushin, A.E. Smirnov, I.N. Eremkina, T. A. Smolyanin, E.S. Matyukhanov, E. A. Butenko","doi":"10.37005/1818-0744-2019-3-47-51","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-3-47-51","url":null,"abstract":"A new technique of distance learning of high school students in engineering disciplines in demand in modern experimental physics is presented. In the learning process, the student in practice solves a set of tasks that correspond to the real problems that arise when conducting modern physical research. For this purpose, an online engineering workshop was developed and implemented, including a modular type laboratory installation, with which it became possible to organize the implementation of various physical experiments using modern methods of a scientific experiment. Users can perform tasks remotely over the Internet, while simultaneously observing the actual process of the installation using a web camera, which provides a certain effect of presence.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124028094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-27DOI: 10.37005/1818-0744-2019-3-18-23
I.B. Volkodaeva, L. S. Napreenko
The article examines the prerequisites for creating a transport hub in an urban environment, ways to simplify navigation and increase passenger comfort by design methods. The classification of transport hubs is given, the features of their formation based on environmental conditions are highlighted, the requirements for transport hub are formulated. Thus, the development of the system of transport hubs leads to a decrease in comfort when using public transport and stimulates the rejection of personal transport, which in turn leads to a decrease in the load on the road transport network and reduced air pollution.
{"title":"FEATURES OF THE STRUCTURE OF TRANSPORT HUB IN THE URBAN ENVIRONMENT","authors":"I.B. Volkodaeva, L. S. Napreenko","doi":"10.37005/1818-0744-2019-3-18-23","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-3-18-23","url":null,"abstract":"The article examines the prerequisites for creating a transport hub in an urban environment, ways to simplify navigation and increase passenger comfort by design methods. The classification of transport hubs is given, the features of their formation based on environmental conditions are highlighted, the requirements for transport hub are formulated. Thus, the development of the system of transport hubs leads to a decrease in comfort when using public transport and stimulates the rejection of personal transport, which in turn leads to a decrease in the load on the road transport network and reduced air pollution.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117307138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-24DOI: 10.37005/1818-0744-2019-2-59-65
I. Lebedev, S.P. Kaplinа
The present article reads about the problem of mercury-containing wastes, their collection and disposal in the urban district of Dubna, Moscow Region. Such waste belong to hazard class I waste and, if improperly handled, poses a threat to environmental pollution and public health. Currently, the collection of such wastes from the population has not been established, therefore, proposals for organizing a collection and disposal system are very relevant. The paper presents a scheme for the disposal of such waste, as well as the volume of waste lamps generated by the city population was estimates and resources that can be involved in secondary circulation were calculated. There was carried out calculation of the amount of waste generated after the disposal of spent mercury lamps in a small-sized vacuum thermo-demercurization unit URL-2M, which can be involved in secondary circulation as material resources.
{"title":"PROPOSALS FOR THE ORGANIZATION OF A SYSTEM FOR THE COLLECTION AND DISPOSAL OF MERCURY-CONTAINING WASTES IN THE URBAN DISTRICT OF DUBNA, MOSCOW REGION","authors":"I. Lebedev, S.P. Kaplinа","doi":"10.37005/1818-0744-2019-2-59-65","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-2-59-65","url":null,"abstract":"The present article reads about the problem of mercury-containing wastes, their collection and disposal in the urban district of Dubna, Moscow Region. Such waste belong to hazard class I waste and, if improperly handled, poses a threat to environmental pollution and public health. Currently, the collection of such wastes from the population has not been established, therefore, proposals for organizing a collection and disposal system are very relevant.\u0000The paper presents a scheme for the disposal of such waste, as well as the volume of waste lamps generated by the city population was estimates and resources that can be involved in secondary circulation were calculated. There was carried out calculation of the amount of waste generated after the disposal of spent mercury lamps in a small-sized vacuum thermo-demercurization unit URL-2M, which can be involved in secondary circulation as material resources.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129042816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-24DOI: 10.37005/1818-0744-2019-2-37-41
M. A. Mardyban, D. A. Sazonov, E. Kolganova, R. Jolos
The observed properties of the low-lying collective excitations of 96Zr and 96Mo are investigated in the framework of the collective quadrupole nuclear model with the Bohr Hamiltonian, whose potential energy has two minima – spherical and deformed. Satisfactory description of the excitation energies and E2 transition probabilities is obtained. It is shown that in the case of 96Zr both minima are sufficiently deep. However, in the case of 96Mo a deformed minimum is only outlined.
{"title":"SHAPE EVOLUTION OF 96ZR AND 96MО WITH EXCITATION ENERGY INCREASE","authors":"M. A. Mardyban, D. A. Sazonov, E. Kolganova, R. Jolos","doi":"10.37005/1818-0744-2019-2-37-41","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-2-37-41","url":null,"abstract":"The observed properties of the low-lying collective excitations of 96Zr and 96Mo are investigated in the framework of the collective quadrupole nuclear model with the Bohr Hamiltonian, whose potential energy has two minima – spherical and deformed. Satisfactory description of the excitation energies and E2 transition probabilities is obtained. It is shown that in the case of 96Zr both minima are sufficiently deep. However, in the case of 96Mo a deformed minimum is only outlined.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127873292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-24DOI: 10.37005/1818-0744-2019-2-53-58
M. N. Ilyina, A. N. Voropay, I. Nemchenok
The properties of zinc oxide nanostructures allow it to be used in various fields of science and technology. The increased interest in this compound is caused by a rare combination of optical and electrophysical properties. The films of this compound have good piezoelectric and electroluminescent properties, due to which zinc oxide can be used as functional layers in surface acoustic waves, elements of nonlinear optics. This allows the oxide to pass visible radiation. In this paper, we study the influence of the conditions for obtaining a coating by pulsed electrochemical deposition on the forbidden zones and the power of a coating based on zinc oxide. It was shown that the temperature and duty cycle of pulses are of great importance in the formation of the coating, which is explained by the kinetics of the electrochemical reaction. The Urbach energy increases with a decrease in crystalline size and increased by almost 3 times, compared with a coarse-grained sample.
{"title":"RESEARCH OF THE PROPERTIES OF ZINC OXIDE NANOSTRUCTURES OBTAINED BY PULSED ELECTROCHEMICAL DEPOSITION","authors":"M. N. Ilyina, A. N. Voropay, I. Nemchenok","doi":"10.37005/1818-0744-2019-2-53-58","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-2-53-58","url":null,"abstract":"The properties of zinc oxide nanostructures allow it to be used in various fields of science and technology. The increased interest in this compound is caused by a rare combination of optical and electrophysical properties. The films of this compound have good piezoelectric and electroluminescent properties, due to which zinc oxide can be used as functional layers in surface acoustic waves, elements of nonlinear optics. This allows the oxide to pass visible radiation. In this paper, we study the influence of the conditions for obtaining a coating by pulsed electrochemical deposition on the forbidden zones and the power of a coating based on zinc oxide. It was shown that the temperature and duty cycle of pulses are of great importance in the formation of the coating, which is explained by the kinetics of the electrochemical reaction. The Urbach energy increases with a decrease in crystalline size and increased by almost 3 times, compared with a coarse-grained sample.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128063310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-24DOI: 10.37005/1818-0744-2019-2-42-52
S. Novikova, E. Gribova, E. Andreev, R. V. Novichkov, P. Gladyshev, N. Kalganova, M. Moroz, O.R. Vertlina, D. Krylsky
The present article deals with colloidal quantum dots (QDs) synthesized in an aqueous medium using thioglycolic acid (TGA), L-cysteine (L-cys) and mercaptoethylamine (MEA) as stabilizers. In contrast to high-temperature synthesis in an organic medium, this method of synthesis enables us to skip an additional time-consuming stage of hydrophilization of QDs. The resulting CdTe QDs were studied by spectroscopic methods of analysis. In the absorption spectra of the QDs there is an exciton peak. The average size of the QDs, which is about 3-4 nm, was calculated based on the position of the exciton peak, the zeta potential of the QDs was measured.
{"title":"СOLLOIDAL SYNTHESIS AND CHARACTERIZATION HYDROPHILIC CDTE QUANTUM DOTS FOR MEDICAL DIAGNOSTICS","authors":"S. Novikova, E. Gribova, E. Andreev, R. V. Novichkov, P. Gladyshev, N. Kalganova, M. Moroz, O.R. Vertlina, D. Krylsky","doi":"10.37005/1818-0744-2019-2-42-52","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-2-42-52","url":null,"abstract":"The present article deals with colloidal quantum dots (QDs) synthesized in an aqueous medium using thioglycolic acid (TGA), L-cysteine (L-cys) and mercaptoethylamine (MEA) as stabilizers. In contrast to high-temperature synthesis in an organic medium, this method of synthesis enables us to skip an additional time-consuming stage of hydrophilization of QDs. The resulting CdTe QDs were studied by spectroscopic methods of analysis. In the absorption spectra of the QDs there is an exciton peak. The average size of the QDs, which is about 3-4 nm, was calculated based on the position of the exciton peak, the zeta potential of the QDs was measured.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122676659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-24DOI: 10.37005/1818-0744-2019-2-3-6
E. Kolganova, O. P. Klimenko, A. Korobitsin, D. Fursaev, V. Roudnev
The binding energies of 4He3 and 4He26Li three-atomic clusters were calculated within the differential Faddeev equations. Obtained results show that different methods provide similar results for different potential models. It is shown that the excited state energy of each system is close to it’s respective two-body threshold, which could indicate on the Efimov nature of the excited state of 4He26Li.
{"title":"INVESTIGATION OF THREE-ATOMIC CLUSTERS WITHIN FADDEEV EQUATIONS","authors":"E. Kolganova, O. P. Klimenko, A. Korobitsin, D. Fursaev, V. Roudnev","doi":"10.37005/1818-0744-2019-2-3-6","DOIUrl":"https://doi.org/10.37005/1818-0744-2019-2-3-6","url":null,"abstract":"The binding energies of 4He3 and 4He26Li three-atomic clusters were calculated within the differential Faddeev equations. Obtained results show that different methods provide similar results for different potential models. It is shown that the excited state energy of each system is close to it’s respective two-body threshold, which could indicate on the Efimov nature of the excited state of 4He26Li.","PeriodicalId":306467,"journal":{"name":"Bulletin of Dubna International University for Nature, Society, and Man. Series: Natural and engineering sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128504512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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