68 research outputs found
130 YEARS SINCE THE BIRTH OF ANTON MAKARENKO: REHABILITATION OF A GREAT PEDAGOGUE AND WRITER
Данная публикация представляет собой обзор статьи, вышедшей по случаю юбилея А. С. Макаренко в Эстонском журнале социальной работы (Sotsiaaltöö 4/2018, 79–86). Автор статьи пытается опровергнуть миф о Макаренко как о подвижнике сталинской коллективистской идеологии, жесткой дисциплины и трудового воспитанияThis is a reference to an article from the Estonian journal of social work (Sotsiaaltöö 4/2018, pp 79-86), which was dedicated to the birth anniversary of Anton Makarenko. The author's aim is to refute the myth of Makarenko as a spokesman of stalinist collectivism and severe discipline ideolog
Low temperature scattering with the R-matrix method: the Morse potential
Experiments are starting to probe collisions and chemical reactions between
atoms and molecules at ultra-low temperatures. We have developed a new
theoretical procedure for studying these collisions using the R-matrix method.
Here this method is tested for the atom -- atom collisions described by a Morse
potential. Analytic solutions for continuum states of the Morse potential are
derived and compared with numerical results computed using an R-matrix method
where the inner region wavefunctions are obtained using a standard nuclear
motion algorithm. Results are given for eigenphases and scattering lengths.
Excellent agreement is obtained in all cases. Progress in developing a general
procedure for treating ultra-low energy reactive and non-reactive collisions is
discussed.Comment: 18 pages, 6 figures, 3 tables, conferenc
Digital heritage politics from the perspective of relational sociology: the case of Nüshu culture in China
In proposing a new conceptual framework that systematises and comprehends the complex dynamics of cultural heritage politics in China, the study takes its inspiration from Chinese scholars who have explored the relevance of Guanxi beyond its immediate business context. While current discourse theory acknowledges that heritage-making entails complex relationships that structure this making, there is as yet no systematic theoretical account of how these relationships co-exist, mediate and transform heritage-making. In developing a relational sociological framework based on the work of John Dewey, the analysis of digital heritage-making includes a case study of Nüshu, the dominant language and culture in villages on the southwestern frontier of China’s Hunan Province. Using netnography, the study analyses a range of online accounts and websites that form part of the heritage-making process. Drawing on rich digital material that includes online competitions, virtual conversations or comments and digital certificates, the findings highlight the need for a more dynamic relational perspective that acknowledges the mutuality of heritage producers and the process of heritage-making. The findings contribute to a sociological account of heritage-making in China and to a more generalist theory of relational sociology
A Method Based on a Nonlinear Generalized Heisenberg Algebra to Study the Molecular Vibrational Spectrum
We propose a method, based on a Generalized Heisenberg Algebra (GHA), to
reproduce the anharmonic spectrum of diatomic molecules. The theoretical
spectrum generated by GHA allows us to fit the experimental data and to obtain
the dissociation energy for the carbon monoxide molecule. Our outcomes are more
accurate than the standard models used to study molecular vibrations, namely
the Morse and the -oscillator models and comparable to the perturbed Morse
model proposed by Huffaker \cite{hf}, for the first experimental levels. The
dissociation energy obtained here is more accurate than all previous models
Toxicity of lunar dust
The formation, composition and physical properties of lunar dust are
incompletely characterised with regard to human health. While the physical and
chemical determinants of dust toxicity for materials such as asbestos, quartz,
volcanic ashes and urban particulate matter have been the focus of substantial
research efforts, lunar dust properties, and therefore lunar dust toxicity may
differ substantially. In this contribution, past and ongoing work on dust
toxicity is reviewed, and major knowledge gaps that prevent an accurate
assessment of lunar dust toxicity are identified. Finally, a range of studies
using ground-based, low-gravity, and in situ measurements is recommended to
address the identified knowledge gaps. Because none of the curated lunar
samples exist in a pristine state that preserves the surface reactive chemical
aspects thought to be present on the lunar surface, studies using this material
carry with them considerable uncertainty in terms of fidelity. As a
consequence, in situ data on lunar dust properties will be required to provide
ground truth for ground-based studies quantifying the toxicity of dust exposure
and the associated health risks during future manned lunar missions.Comment: 62 pages, 9 figures, 2 tables, accepted for publication in Planetary
and Space Scienc
Temperature dependence of hot luminescence in solid xenon: theory and experiment
Vibrational relaxation of self-trapped excitons in solid xenon has been investigated both experimentally and theoretically. Hot luminescence spectra of the crystal have been measured in a wide temperature range (from liquid helium temperature to 100 K), using x-ray and two-photon excimer laser (ArF and KrF) excitation. The theoretical analysis is based on a recent nonperturbative relaxation theory and on a rigorous quantum mechanical Franck—Condon approach
A quasi-bound rovibrational state of hydrogen molecule resulting from hyperfine proton-electron spin-spin interaction
A potential energy surface for the ground-state hydrogen molecule is constructed, which includes nonadiabatic, relativistic, radiative and hyperfine corrections. A new interpretation is given to the “exotic” level E14, 4, very close to the molecule's dissociation limit. Hyperfine proton-electron spin-spin interaction not only splits the atomic ground state but it also changes the long-range part of the related potential. As a result, the level E14, 4 is converted into an extremely narrow resonance with lifetime of over 5 minutes
From a clastic tidal shelf to an isolated carbonate platform: an effect of tensional tectonics in the Lower Cambrian of SW Sardinia.
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