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Детский университет. Исследователи объясняют загадки мира.
Т. 1.
-, 2017.
Штойернагель У., Янссен У.
Translator: Леенсон Е. И., Аралова Е. Б., А. Горбова
Research target:
Mathematics
Education
Physics
Sociology (including Demography and Anthropology
History and Archeology
Language:
Russian
Жакупов О. Б., European Journal of Mathematics 2025 Vol. 11 Article 84
We provide examples of smooth three-dimensional Fano complete intersections of degree 2, 4, 6, and 8 that have absolute coregularity 0. Considering the main theorem of Avilov, Loginov, and Przyjalkowski (CNTP 18:506–577, 2024) on the remaining 101 families of smooth Fano threefolds, our result implies that each family of smooth Fano threefolds has an element of absolute ...
Added: May 18, 2026
Smirnov A., Kurtina D. A., Saitov S. R. et al., Optical Materials: X 2026 Vol. 30 Article 100441
Chiral semiconductor nanostructures and nanoparticles are promising materials for applications in biological sensing, enantioselective separation, photonics, and spin-polarized devices. Here we performed a detailed analysis of optical properties of chiral CdSe nanoplatelets with thickness of 2 and 3 monolayers (ML) with Nacetyl-L-cysteine ligands. We studied the absorption spectra peculiarities, analyzed time-resolved photoluminescence and investigated circular ...
Added: May 18, 2026
Smirnov A., Mantsevich V. N., Saitov S. R. et al., Journal of Applied Physics 2026 Vol. 139 Article 185702
This work presents a comprehensive investigation into the temperature-dependent thermally stimulated conductivity and photoconductivity of vacuum-annealed thin films based on core–shell CdSe/CdS nanoplatelets passivated with oleic acid ligands. Controlled thermal annealing under vacuum conditions leads to a substantial increase in both dark and photoinduced conductivity, which is primarily attributed to partial desorption of the ligands. ...
Added: May 18, 2026
Zamkovaya M., Педагогика и психология образования 2026 № 1 С. 57–67
В статье рассматривается процесс становления системы билингвального образования в Республике Сербия с акцентом на его цели, достижения и существующие вызовы. Отмечается, что несмотря на положительные результаты, образовательные учреждения сталкиваются с рядом проблем, среди которых недостаточное финансирование, нехватка квалифицированных специалистов и отсутствие четкой нормативно-правовой базы, регламентирующей процесс билингвального обучения. В статье также анализируются результаты эмпирических исследований, ...
Added: May 18, 2026
Масютин Д. А., Moiseev E., Komarov S. et al., Письма в Журнал технической физики 2026 Т. 52 № 7 С. 27–30
Исследованы инжекционные полупроводниковые микролазеры с кольцевым резонатором радиусом 15 мкм с несимметричным расположением внутреннего отверстия резонатора. Показано, что асимметрия обеспечивает формирование в диаграмме направленности двух лепестков излучения, разориентированных на 50° относительно оси смещения внутреннего отверстия. Измеренная добротность резонаторов сопоставима с добротностью дисковых резонаторов и находится на уровне ∼ 10^6. ...
Added: May 18, 2026
Андреева О. С., Просвещение, 2023.
Эта книга о том, как воспитать финансово грамотных детей. Не так важно, какой уровень дохода в вашей семье: умение зарабатывать, сберегать и тратить поможет вашим детям достичь благополучия в будущем. Все необходимые навыки для реальной сложной и порой трудной жизни вы должны вложить в детей сами.
Эта книга – пособие, которое поможет родителям понятно, последовательно и ...
Added: May 18, 2026
Андреева О. С., Росмэн-Пресс, 2026.
«Деньги. Энциклопедия российского школьника» кратко и емко расскажет:
· Чем в древности платили за товары
· Как выглядели первые деньги, из чего их делали и где хранили
· Как найти клад и можно ли выиграть в лотерею
· Как работает банк
· Как дети и подростки могут зарабатывать и распоряжаться личным бюджетом
· И еще сотни интересных научно-обоснованных фактов
Книга поможет мальчикам ...
Added: May 18, 2026
Андреева О. С., Просвещение, 2024.
В книге собраны рекомендации и практические советы приёмным родителям, с помощью которых можно сформировать у детей правильное отношение к денежным средствам, рассказывается, какими словами объяснять понятные взрослым истины относительно личных и семейных финансов ребёнку любого возраста. Одной из задач книги стала необходимость объяснения этого феномена — потребительского отношения приёмных детей к труду замещающих родителей, к ...
Added: May 18, 2026
Pavliuk D., Higher Education 2026
The literature on doctoral students’ experience rarely examines the importance of thesis topic characteristics, even though this is one of the central decisions both at the start and throughout the doctoral journey. Although studies examine how students choose their thesis topics, there is little research on how different topic characteristics are linked to doctoral experience ...
Added: May 16, 2026
Kuzina L., Popov E., Мониторинг общественного мнения: Экономические и социальные перемены 2026 № 2 С. 170–191
The article examines internet users' tactics for verifying false (fake) information and the factors associated with fact-checking. Working within the framework of the theory of prosumerism and everyday tactics (Michel de Certeau), the authors of the study aim at identifying and describing the arsenal of fact-checking tactics used by the Russian internet audience, and to ...
Added: May 16, 2026
The Journal of Physical Chemistry Letters 2026 Vol. 17 No. 18 P. 5386–5394
We demonstrate and rationalize the effect of Au nanoparticles (NPs) on the hierarchical g-C3N4/CeO2 heterojunction. g-C3N4/CeO2 decorated with monodispersed plasmonic Au NPs was synthesized. Detailed analyses showed that CeO2 nanocubes and monodispersed Au NPs were evenly distributed over the 2D g-C3N4 surface, forming a robust interface enriched with abundant active sites. The structure enabled efficient separation of photogenerated charge ...
Added: May 16, 2026
Das A., Paul R., Sharma N. et al., Colloids and Surfaces A: Physicochemical and Engineering Aspects 2026 Vol. 728 P. 138830
Niobium-doped TiO2 (Nb-TiO2), demonstrates dual functionality as an efficient photocatalyst for dye degradation and a promising photoelectrocatalyst for water oxidation. Nb incorporation via a facile hydrothermal method was confirmed by XRD (Rietveld refinement), XPS, TEM, FT-IR, Raman, and BET analyses, indicating successful lattice doping and structural modification. Photocatalytic dye degradation experiments were conducted using a model ...
Added: May 16, 2026
Mkrtchyan N. V., Regional Research of Russia 2026 Vol. 16 No. 1 P. 170–181
The aim of the study is to assess the provision of all settlements in four regions of the Near North of Russia (Vologda, Kostroma, Kirov, and Yaroslavl oblasts) with social infrastructure institutions and to analyze whether the migration balance of settlements is associated with different provision of these institutions. The study was conducted using data ...
Added: May 16, 2026
Паникар М. М., Polar Journal 2026
The article attempts to explore the process of formation of a new sphere of relations between the USSR and the countries of the Arctic region in the period from 1986 to 1990. The April Plenum of the Communist Party Central Committee in 1985 laid the groundwork for a profound transformation in both the domestic and ...
Added: May 15, 2026
Kolachev N., Kovaleva G., Educational Research and Evaluation 2026 P. 1–24
This study investigates the psychometric structure and school-level associations between cognitive abilities of teachers and students. Using a cross-sectional quantitative design, we administered a PISA-based cognitive assessment tool measuring reading, mathematics, science literacy, and global competence to 5,391 eighth-grade students and 2,385 teachers from 84 schools in a Russian region. Bifactor modeling, measurement invariance testing, ...
Added: May 15, 2026
Lerman L. M., Turaev D. V., Regular and Chaotic Dynamics 2026 Vol. 31 No. 3 P. 349–369
We show that bifurcations of four-dimensional symplectic diffeomorphisms with a quadratic homoclinic tangency to a saddle periodic orbit with real multipliers produce 2-elliptic periodic orbits if the tangency is not partially hyperbolic. We show that a normal form for the rescaled first-return maps near such tangency is given by a four-dimensional symplectic H´enonlike map and study bifurcations of the ...
Added: May 15, 2026
Aleskerov F. T., Yakuba V. I., Khutorskaya O. et al., Springer, 2026.
The book contains new models of bibliometric analysis based on centrality measures in network analysis, pattern analysis and stability analysis. A distinctive feature of these centrality measures is that they account for the parameters of vertices and group influence of vertices to a vertex. This reveals specific groups of publications, authors, terms, journals and affiliations ...
Added: May 15, 2026
Kuptsov P., Panyushev A., Stankevich N., Chaos 2026 Vol. 36 No. 5 Article 053138
We develop a machine-learning approach to reproduce the behavior of two versions of the van der Pol oscillator exhibiting a subcritical Andronov–Hopf bifurcation, with or without a codimension-2 Bautin point. We construct a neural-network model that functions as a recur rent map and train it on short segments of oscillator trajectories. The results show that, ...
Added: May 15, 2026
Kolokolov I., Lebedev V., Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 2026 Vol. 113 Article 054117
We theoretically investigate the correlation functions of the phase of a light wave propagating through a
turbulent medium. We use an equation for the logarithm of a wave packet envelope, which includes a secondorder
nonlinear term. Based on this equation, we develop a diagrammatic technique to calculate corrections
to the correlation function obtained in the linear approximation. We ...
Added: May 15, 2026
Sizov A., Rodionova M., Sedashov E. et al., / NRU Higher School of Economics. Series PS "Political Science". 2026. No. 1.
Rapid development of surveillance technologies is one of the most socially important consequences of the digital age. This paper investigates the factors determining consent to surveillance of various types of personal data and contributes to rapidly growing research on citizens perceptions of surveillance practices. Relying on a comprehensive survey experiment, we study the effects of ...
Added: May 15, 2026
Dorovskiy A., / Series arXiv "math". 2026.
In this paper the structural stability of generic families of vector fields of the PC-HC class on the two-dimensional sphere is proved. A classification of these families up to moderate equivalence in neighborhoods of their large bifurcation supports is presented, based on such invariants as the configuration and the characteristic set. The realization lemma is proved. ...
Added: May 14, 2026
М.: ООО «Макс Пресс», 2026.
В настоящем сборнике представлены тезисы докладов участников семинара "Интеграция основного и дополнительного физико-математического образования", проходившего 11 февраля 2026 года в ГБОУ Школа №2007 ФМШ г. москвы, а также другие публикации, посвящённые вопросам дополнительного физико-математического образования. ...
Added: May 11, 2026
Карцева М. А., Peresetsky A., / Высшая школа экономики. Серия WP2 "Количественный анализ в экономике". 2026. № WP2/2026/01.
This study examines the association between health status among elderly individuals living alone and pet ownership (cats, dogs). We employ data from the “Time Use Survey” conducted by the Federal State Statistics Service (Rosstat) in 2019, which contains information on more than 10,000 elderly individuals living alone aged 60 or older in Russia, including data ...
Added: May 8, 2026
Taletskii D., / Series arXiv "math". 2026.
A vertex subset of a graph is called a \textit{distance-$k$ independent set} if the distance between any two of its distinct vertices is at least $k + 1$. For all $n,k \geq 1$, we determine the minimum possible number of inclusion-wise maximal distance-$k$ independent sets among all $n$-vertex trees. It equals~$n$ if $n \leq k ...
Added: May 1, 2026