Персона: Тюфлин, Сергей Александрович
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Институт общей профессиональной подготовки (ИОПП)
Миссией Института является:
фундаментальная базовая подготовка студентов, необходимая для получения качественного образования на уровне требований международных стандартов;
удовлетворение потребностей обучающихся в интеллектуальном, культурном, нравственном развитии и приобретении ими профессиональных знаний; формирование у студентов мотивации и умения учиться; профессиональная ориентация школьников и студентов в избранной области знаний, формирование способностей и навыков профессионального самоопределения и профессионального саморазвития.
Основными целями и задачами Института являются:
обеспечение высококачественной (фундаментальной) базовой подготовки студентов бакалавриата и специалитета; поддержка и развитие у студентов стремления к осознанному продолжению обучения в институтах (САЕ и др.) и на факультетах Университета; обеспечение преемственности образовательных программ общего среднего и высшего образования; обеспечение высокого качества довузовской подготовки учащихся Предуниверситария и школ-партнеров НИЯУ МИФИ за счет интеграции основного и дополнительного образования;
учебно-методическое руководство общеобразовательными кафедрами Института, осуществляющими подготовку бакалавров и специалистов по социо-гуманитарным, общепрофессиональным и естественнонаучным дисциплинам, обеспечение единства требований к базовой подготовке студентов в рамках крупных научно-образовательных направлений (областей знаний).
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Тюфлин
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Сергей Александрович
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- ПубликацияТолько метаданныеReconstruction of the temperature in the active layer of the glacier on the Western plateau of Elbrus for 1930-2008(2020) Tyuflin, S. A.; Nagornov, O. V.; Chernyakov, G. A.; Mikhalenko, V. N.; Тюфлин, Сергей Александрович; Нагорнов, Олег ВикторовичThe reconstruction of changes in the temperature of the base of the active layer (at a depth of 10 m) of the glacier on the Western plateau of Elbrus for the period 1930-2008 was performed. The temperature dynamics at this depth generally corresponds to the average annual changes in the air temperature at the height of the plateau (5100 m), since seasonal temperature fluctuations take place in the active layer. The initial data for the mathematical model are: 1) the temperature measurements in a borehole with a depth of 181.8 m, drilled on the plateau (2009); 2) vertical profile of the density of the firn/ice thickness; 3) vertical profile of the advection rate (ice speed), recently obtained from the analysis of the ice core (2015). Temperature changes are reconstructed by solving an incorrect inverse problem for the 1D heat equation with coefficients depending on the depth. The following conditions are added to the heat conduction equation: 1) the initial one that is calculated stationary temperature profile related to the beginning of the reconstruction period; 2) the boundary condition at the glacier bed - calculated permanent geothermal heat flux; 3) the condition of redefinition, i.e. distribution of the temperature measured in the borehole at the end of the reconstruction period. Solving the inverse problem, we obtain a previously unknown boundary condition on the surface which is the temperature of the active layer base as a function of time. The depth is reckoned from the base of the active layer. The method used for solving the inverse problem is the Tikhonov regularization, implemented numerically as an iterative procedure. The boundary condition on the surface (the restored function of the temperature changes) was found as a finite sum of harmonics with indeterminate coefficients. To improve the accuracy of the reconstruction, we used harmonic frequencies obtained from another indirect climate indicator - the tree-ring chronology for the Central Caucasus. Wavelet analysis was used to extract characteristic frequencies from the dendrochronological data. Our reconstruction determined the temperature changes within range from -17.7 to -15.3 degrees C for the investigated period. The reconstruction data were compared with independent polynomial smoothed temperature series from the studied region: with ENCEP/ENCAR reanalysis (significant correlation coefficient 0.76), as well as with temperature measurements at the Terskol (0.53) and Teberda weather stations. The reconstruction clearly reflects the main climate trends of the twentieth century: a warmer period in the 1940s, a colder period in the 1960s and 1980s, and extreme warming around 2000.
- ПубликацияТолько метаданныеPast Surface Temperatures Reconstructed by Inversion of the Measured Borehole Temperature-Depth Profiles in Rock(2019) Tyuflin, S. A.; Nagornov, O. V.; Bukharova, T. I.; Тюфлин, Сергей Александрович; Нагорнов, Олег Викторович; Бухарова, Татьяна Иннокентьевна© 2019, Springer Nature Switzerland AG.The measured temperature-depth profiles in boreholes are proxy climate indicators. The climatic temperature signal at the surface penetrates in the rock thickness and disturbs the steady-state temperature of the Earth. The measured temperature-depth profile can be so-called the re-determination condition to solve the inverse problem for the thermal diffusivity equation, and retrieve the past surface temperature history. We study properties of solution for this problem. We derive that the solution is not unique. However, there were done numerous past surface temperature reconstructions. We show that it is needed to take into account some a priori data to determine past temperatures correctly.
- ПубликацияТолько метаданныеAccuracy Enhancement for Past Surface Temperature Reconstructions Based on the Additional Climatic Data(2022) Nagornov, O. V.; Tyuflin, S. A.; Bukharova, T. I.; Нагорнов, Олег Викторович; Тюфлин, Сергей Александрович; Бухарова, Татьяна Иннокентьевна© 2022 American Institute of Physics Inc.. All rights reserved.Well-known methods of the past surface temperature recovery based on the borehole measurements result in significant smoothing of the reconstructed temperature. We compare well-known reconstructions with one based on a prior information on climatic periods that keeps both short- and long-term peculiarities of temperature history.
- ПубликацияОткрытый доступModeling of Mechanisms of Wave Formation for COVID-19 Epidemic(2023) Leonov, A.; Nagornov, O.; Tyuflin, S.; Леонов, Александр Сергеевич; Нагорнов, Олег Викторович; Тюфлин, Сергей Александрович
- ПубликацияТолько метаданныеInverse problem for coefficients of equations describing propagation of COVID-19 epidemic(2021) Leonov, A. S.; Nagornov, O. V.; Tyuflin, S. A.; Леонов, Александр Сергеевич; Нагорнов, Олег Викторович; Тюфлин, Сергей Александрович© 2021 Institute of Physics Publishing. All rights reserved.The inverse problems for coefficients of ordinary differential equations describing propagation of coronavirus infection are studied. The well-known models of SEI and SEIR, and their generalization are used. Important role plays the coefficients of these equations that can be estimated by in-direct observations and depends on many factors. This approach allowed us to solve the problem with several waves of epidemic and to predict further propagation.
- ПубликацияОткрытый доступDetermination of paleotemperature for the Elbrus glacier based on the inverse problem solution(2019) Mikhalenko, V. N.; Chernyakov, G. A.; Nagornov, O. V.; Tyuflin, S. A.; Нагорнов, Олег Викторович; Тюфлин, Сергей Александрович© 2019 Published under licence by IOP Publishing Ltd.The surface temperature reconstruction for the Elbrus Plato is built. It takes into account new data on the annual layers in the glacier. The dendrochronological data are used as an additional information that allows us to improve accuracy of calculations and stability of the solutions.