Издательство: "Springer" (стр.8)
| Название: | Study of the photodegradation of brilliant green on mechanically activated powders of zinc oxide | 
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| Автор ПГУ: | Аверин Игорь Александрович  Пронин Игорь Александрович Якушова Надежда Дмитриевна | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2017 | |
| Дата загрузки: | 17.11.2018 | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | Sub-Riemannian Geodesics on the Multidimensional Heisenberg Group |
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| Автор ПГУ: | Сурина Ольга Петровна Паньженский Владимир Иванович | |
| Тематика: | физико-математические науки | |
| Вид ресурса: | электронное немультимедийное издание | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2023 | |
| Дата загрузки: | 08.11.2023 | |
| Название: | Subject-economic groups for the information-measuring system for determining the ecological well-being of a person |
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| Автор ПГУ: | Безбородова Оксана Евгеньевна Трофимов Алексей Анатольевич | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | The article examines the problem of choosing corrective measures to ensure the ecological well-being of a person in the territorial technosphere. The purpose of the study is to develop a methodology for the reasonable choice of corrective measures. To achieve the goal, it is proposed to use the relative risk as a measure of the ecological well-being of a person. Based on Pigou's model of environmental externalities, an algorithm for creating a list of corrective measures for two situations is proposed: when the actual risk values exceed the norm and the decision maker needs to know how much investment is needed to improve the environmental well-being of a person; when the decision maker has some financial resources at his disposal and it is necessary to find out how the ecological well-being of a person will change if they are invested in appropriate activities. The results obtained allow us to conclude that the use of risk as a measure of a person's environmental well-being, as well as subject-economic groups, makes it possible to form a list of corrective measures, taking into account the mutual influence of the components of the territorial technosphere and the combined action of risk factors. | |
| Дата издания: | 2024 | |
| Дата загрузки: | 29.11.2024 | |
| Название: | Synthesis of II-VI Semiconductor Nanocrystals |
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| Автор ПГУ: | Пронин Игорь Александрович | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Абитуриент | |
| Дата издания: | 2023 | |
| Дата загрузки: | 15.11.2024 | |
| Название: | Synthesis of Signal’s Polarization Selection System with the Background of Passive Noise Formed by Reflections from Distributed Targets |
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| Автор ПГУ: | Юрков Николай Кондратьевич | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Преподаватель | |
| Дата издания: | 2021 | |
| Дата загрузки: | 18.11.2021 | |
| Название: | Synthesis problem and mathematical modeling of multilayered absorbing coating |
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| Автор ПГУ: | Деревянчук Екатерина Дмитриевна Смирнов Юрий Геннадьевич Шутков Александр Сергеевич | |
| Тематика: | физико-математические науки | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь, Промышленность | |
| Аннотация: | The paper is devoted to application of the waveguide method in mathematical modeling of multilayered radar absorbing coating. Mathematically, it leads to a synthesis problem. We present a numerical-analytical method for solution of this problem and show computational results which can be applied in design of multilayered coatings. | |
| Дата издания: | 2018 | |
| Дата загрузки: | 14.11.2018 | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | Technological Support of Gluing Quality when Repairing Products |
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| Автор ПГУ: | Скрябин Владимир Александрович | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное, Справочное | |
| Целевая аудитория: | Преподаватель | |
| Дата издания: | 2021 | |
| Дата загрузки: | 11.11.2021 | |
| Название: | The Effects of 2D Dissipative Tunneling for the Recombination Radiation Spectra of Interacting Quantum Dots in an External Electric Field |
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| Автор ПГУ: | Кревчик Владимир Дмитриевич Разумов Алексей Викторович Семенов Михаил Борисович | |
| Тематика: | физико-математические науки | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | Quantum dots (QDs) have unique optical properties that are widely used in optoelectronics, biology, and medicine. The problem of controlling the spectral and luminescent properties of QDs has initiated studies of the mechanisms by which QDs interact with each other and with the surrounding matrix. Such interactions can, under certain conditions, significantly modify the radiative properties of QDs, which will affect the characteristics of laser structures and biosensors based on them. The aim of this work is a theoretical study of the 2D dissipative tunneling effect in the “QD–surrounding matrix” system, as well as the pair electrostatic interaction of QDs with A+ + e impurity complexes, on recombination radiation associated with the optical transition of an electron from the QD ground state to the quasi-stationary A+ state in an external electric field. The interaction of an electron, which is in the ground state of a QD, and a hole that is localized at the A+ center has been considered within the framework of the adiabatic approximation. The dispersion equations that determine dependence of the hole binding energy in the A+ + e impurity complex in a spherically symmetric QD on the external electric field and dissipative tunneling parameters have been obtained within the zero range potential model, in the effective mass approximation. Calculation of the spectral intensity of recombination radiation (SIRR) in QDs with an A++e impurity complex in an external electric field has been performed in the dipole approximation. Influence of the electric field on the ground state of an electron in a QD has been taken into account in the second order of the perturbation theory. Numerical calculations and plotting were carried out for a semiconductor quantum dot based on InSb using the symbolic mathematics of Mathcad 14 and Wolfram Mathematica 9. The 2D dissipative tunneling probability has been calculated with exponential accuracy for the 2D oscillatory potential model at a finite temperature, taking into account the linear interaction with the phonon modes of the environment media (or a heat bath) in the one-instanton semiclassical approximation. It is shown that the field dependence of the binding energy for the quasi-stationary A+ state has an oscillating character, associated with quantum beats that occur during parallel 2D tunneling transfer. It is found that the SIRR curves have a characteristic kink corresponding to the 2D bifurcation point that occurs when the tunneling regimes in the interacting pair of QDs change from synchronous to asynchronous. It has been established that, in the vicinity of the 2D bifurcation point, there are irregular oscillations in the SIRR associated with the modes of quantum beats, in the course of which competing trajectories of tunneling appear. It is found that the parameters of dissipative tunneling—the temperature, frequency of the phonon mode, constant of interaction with the contact medium, constant of the QDs interaction—have a significant effect on the amplitude of quantum beats and the position of the 2D bifurcation point in the SIRR. Taking into account the interaction of the QD with the surrounding matrix leads to a significant modification of the SIRR, which manifests itself in the form of bifurcation points and quantum beats that depend on the dissipative tunneling parameters. Accounting for the pairwise interaction of QDs with each other via hole repulsion in A+ + e complexes leads to suppression of recombination radiation with an increase in the interaction constant. | |
| Дата издания: | 2023 | |
| Дата загрузки: | 13.11.2023 | |
| Название: | The Formation of Au Nanoparticles in SiO2–TiO2 Films by Local Electrochemical Reduction Using an Atomic Force Microscope Probe |
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| Автор ПГУ: | Кревчик Владимир Дмитриевич Семенов Михаил Борисович | |
| Тематика: | физико-математические науки | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | The aim of this work is to experimentally investigate the features of the formation of Au nanoparticles (NPs) in SiO2–TiO2 films by the method of local electrochemical reduction using an atomic force microscope (AFM) probe. The study has the additional aim of establishing the modes of the formation of Au NPs, which provide controlled production of NPs with specified parameters. The created scientific and technical products are intended for use in nanoelectronics, integrated optics, optoelectronics, and plasmonics to create new nanoelectronic devices based on MNP arrays embedded in dielectric films, metal nanoantennas of arbitrary shape embedded in optical dielectric waveguides based on thin-film structures, etc. (The relevance of ongoing research is related to this.) An experimental study of the formation processes of individual Au NPs in the thickness of SiO2–TiO2 films has been carried out by the method of local electrochemical reduction of Au(III) ions using an AFM probe. Au NPs have been formed in SiO2–TiO2 films using a SolverPro atomic force microscope manufactured by Nanotechnology-MDT (Zelenograd, Russia) in the contact mode. We have used AFM cantilevers made of Si with Pt coating by Nanotechnology-MDT CSG-01. Before the formation of Au NPs, AFM images of a selected area of the gel-film surface have been measured: z(x, y), where x and y are the coordinates of the AFM probe tip in the sample surface plane and z is the surface height at the point with coordinates x, y. In addition, simultaneously with AFM images, images of current for selected areas of the sample surface have been measured. The processes of the Au NPs formation in SiO2–TiO2 gel films containing Au(III) ions deposited on glass substrates with an ITO sublayer by the sol–gel method, have been studied in the course of local electrochemical reduction of Au(III) ions using a conducting AFM probe. It is shown that, after the modification of gel films by applying positive voltage pulses to the AFM probe relative to the ITO sublayer, the images of current for the modified regions show channels of current associated with the formation of Au NPs at the interface between the ITO sublayer and of the gel film as a result of local electrochemical reduction of Au(III) in the area under the contact of the AFM probe to the surface of the gel film. It has been established that the formation of Au NPs also manifests itself in the appearance of hysteresis in the cyclic CVC of the contact between the AFM probe and the surface of the gel film measured during the formation of NPs. It was found that, upon modification of the SiO2–TiO2 gel film by applying a negative voltage pulse to the AFM probe relative to the ITO sublayer, the formation of toroidal Au nanostructures has been observed, associated with the electrochemical reduction of Au(III) ions near the contact of the AFM probe with the surface of the gel film. The results of the carried out studies are planned to be used in the future in the development of methods for the controlled formation of MNPs in thin dielectric films using AFM. | |
| Дата издания: | 2023 | |
| Дата загрузки: | 13.11.2023 | |
| Название: | The influence of the design parameters and technological factors on functional properties of the spiral joints of the parts |
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| Автор ПГУ: | Евгений Сергеевич Воячек Игорь Иванович Кочетков Денис Викторович Баранов Илья Викторович | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | Profiled joints of parts (PJ), in which the transfer of the operational load occurs by means of force closure of surfaces, are quite widely used in mechanical engineering. An alternative type of joint is a joint with a guaranteed tension (IFJ), which transmit the load by frictionally closing the mating surfaces of the parts. Such a joint combines the advantages of PJ and IFJ is a spiral friction-profile joint (SFPJ). It joins parts with spiral profile of mating surfaces. The properties of the spiral connection of parts are practically not studied, and there is no methodology for its design and the corresponding regulatory documentation. This article examines the influence of the design parameters and technological factors on the functional properties and stress-strain state of the SFPJ. Analytical methods are used, as well as the finite element method in computer modeling. The design parameters influencing the nominal area parts’ contact are found. The irregularity in the distribution of the equivalent tensions in the contact area is found. The technological factors which are necessary to control in order to provide SFPJ functional properties are found. The spiral friction-profile joint can effectively replace spline, keyed, pinned, profiled joints, tension joints and other fixed connections. | |
| Дата издания: | 2023 | |
| Дата загрузки: | 02.10.2023 | |
| Название: | The Model of Optimizing the Use of Capital in the Agricultural Business |
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| Автор ПГУ: | Самыгин Денис Юрьевич | |
| Тематика: | экономика | |
| Вид ресурса: | электронное немультимедийное издание | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2021 | |
| Дата загрузки: | 21.06.2021 | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | The State and Prospects of Development of Aviation Simulator Construction |
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| Автор ПГУ: | Юрков Николай Кондратьевич | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Преподаватель | |
| Дата издания: | 2022 | |
| Дата загрузки: | 21.11.2022 | |
| Название: | The Structure and Principle of the Intelligent Micro-arc Oxidation System Operation |
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| Автор ПГУ: | Печерская Екатерина Анатольевна Голубков Павел Евгеньевич Александров Владимир Сергеевич Кирюткин Илья Алексеевич Никишин Кирилл Игоревич | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2024 | |
| Дата загрузки: | 06.10.2024 | |
| Название: | The system of automatic control of the substrate temperature as part of the installation for the production of film material by spray pyrolysis |
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| Автор ПГУ: | Печерская Екатерина Анатольевна Семенов Анатолий Дмитриевич Зинченко Тимур Олегович Данилов Александр Александрович Нелюцкова Диана Евгеньевна | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2024 | |
| Дата загрузки: | 23.10.2024 | |
| Название: | Theoretical foundation for calculating hydrodynamic characteristics of turbulent fluid flow in tubular mixing devices to intensify reagent wastewater treatment |
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| Автор ПГУ: | Сергей Юрьевич Михаил Ильич Лебединский Константин Валерьевич | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | The results of theoretical studies of the hydrodynamic laws of fluid flow and changes in the characteristics of the wall layer of the flow in tubular mixing devices, used in technological processes of reagent-based wastewater treatment, are presented. A mathematical relation, which allows determining the critical value of the Reynolds number Re, at which the regime of fluid movement in a tubular mixing device passes into the region of the quadratic resistance law of rough channels with the maximum degree of turbulence of flows, is obtained. It is shown that the main technical characteristics of tubular mixing devices are: the magnitude of the pulsation component of the local velocity ∆υl (m/s) and the value of the turbulent diffusion coefficient DT (m2/s) in the wall region of the turbulent fluid flow. Mathematical relations, which allow calculating the magnitude of the pulsation component of the local velocity and the turbulent diffusion coefficient in the wall region of the fluid flow in the pressure channels of circular cross section, are obtained. Using the proposed calculation technique will allow to optimize the operation regime of tubular mixing devices. | |
| Дата издания: | 2020 | |
| Дата загрузки: | 23.11.2020 | |
| Название: | Transformation of Vegetation as a Limiting Factor for the Existence of Rodent Populations in Open Spaces (on the Example of Spermophilus suslicus) |
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| Автор ПГУ: | Леонова Наталья Алексеевна Титов Сергей Витальевич Картавов Никита Александрович Чернышова Ольга Валерьевна Волкова Елена Константиновна | |
| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь, Учащийся | |
| Аннотация: | A comparative analysis of the composition and structure of plant communities in two places of former habitation of the speckled ground squirrel (Spermophilus suslicus) in the Nikolaevsky district of Ulyanovsk oblast is given. The analysis of a modern state of the S. suslicus populations in the Volga region demonstrated that over the past fifty years, a critical decrease in the species number (and its complete disappearance in some regions) is observed. A number of researchers note that dynamic changes in the vegetation have a certain effect on these processes. Therefore, the aim of our work was a comparative study of biotope vegetation at the time of a high number of animals against the background of intensive grazing and in the absence of ground squirrel settlements for more than 15–20 years in the absence of grazing. Our studies demonstrated that there is an increase in the species richness and structural diversity of the communities due to the introduction of the species of pine, nemoral, and boreal ecologocenotic groups into their composition. Phytocenoses of steppe meadows with a high involvement of Festuca valesiaca, Poa pratensis, Helictotrichon pubescens, Elytrigia repens after the cessation of grazing are replaced by the cenoses of meadow steppes with a dominance of Bromopsis riparia, Poa angustifolia, Calamagrostis epigeios. There is an increase in the total projective cover of the grass stand (from 40 to 60–70%). Forage species that are background at the moment of high number of animals sharply decrease their involvement in the grass stand. Changes in ecological conditions of the biotopes are typical: modern communities are formed in drier, less nitrogen-rich and “acidic” habitats. A preservation and possible restoration of the speckled ground squirrel settlements in the Volga region is possible under scientifically substantiated anthropogenic effect realized in the form of haymaking and grazing. | |
| Дата издания: | 2025 | |
| Дата загрузки: | 27.11.2025 | |
| Название: | TRUST CREATION AS A FACTOR FOR THE SOLIDARITY OF GOVERNMENT, BUSINESS, AND SOCIETY IN REGIONAL INNOVATION DEVELOPMENT |
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| Автор ПГУ: | Гамидуллаева Лейла Айваровна | |
| Тематика: | экономика | |
| Вид ресурса: | электронное немультимедийное издание | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2025 | |
| Дата загрузки: | 29.10.2025 | |
| Название: | Two-Step Method for Permittivity Determination of an Inhomogeneous Body Placed in a Rectangular Waveguide |
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| Автор ПГУ: | Смирнов Юрий Геннадьевич Медведик Михаил Юрьевич Москалева Марина Александровна | |
| Тематика: | физико-математические науки | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2018 | |
| Дата загрузки: | 14.11.2018 | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | Voice analysis technology before and after neck surgery |
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| Автор ПГУ: | Алимурадов Алан Казанферович Тычков Александр Юрьевич Чернышов Денис Сергеевич Мамонова Анна Алексеевна | |
| Тематика: | техника | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь, Преподаватель | |
| Дата издания: | 2025 | |
| Дата загрузки: | 23.11.2025 | |
| Название: | Volunteering as a special activity: regional aspect |
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| Автор ПГУ: | Скворцов Алексей Олегович Скворцова Валентина Алексеевна Брыкина Светлана Викторовна | |
| Тематика: | экономика | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2021 | |
| Дата загрузки: | 05.11.2022 | |