203 research outputs found
High sensitivity Cavity Ring Down spectroscopy of 18O enriched carbon dioxide between 5850 and 7000 cm-1: Part III-Analysis and theoretical modeling of the 12C17O2, 16O12C17O, 17O12C18O, 16O13C17O and 17O13C18O spectra
More than 19,700 transitions belonging to 11 isotopologues of carbon dioxide
have been assigned in the room temperature absorption spectrum of highly 18O
enriched carbon dioxide recorded by very high sensitivity CW-Cavity Ring Down
spectroscopy between 5851 and 6990 cm-1 (1.71-1.43 \mum). This third and last
report is devoted to the analysis of the bands of five 17O containing
isotopologues present at very low concentration in the studied spectra:
16O12C17O, 17O12C18O, 16O13C17O, 17O13C18O and 12C17O2 (627, 728, 637, 738 and
727 in short hand notation). On the basis of the predictions of effective
Hamiltonian models, a total of 1759, 1786, 335, 273 and 551 transitions
belonging to 24, 24, 5, 4 and 7 bands were rovibrationally assigned for 627,
728, 637, 738 and 727, respectively. For comparison, only five bands were
previously measured in the region for the 728 species. All the identified bands
belong to the \deltaP=8 and 9 series of transitions, where P=2V1+V2+3V3 is the
polyad number (Vi are vibrational quantum numbers). The band-by-band analysis
has allowed deriving accurate spectroscopic parameters of 61 bands from a fit
of the measured line positions. Two interpolyad resonance perturbations were
identified
First Measurement of Monoenergetic Muon Neutrino Charged Current Interactions
We report the first measurement of monoenergetic muon neutrino charged
current interactions. MiniBooNE has isolated 236 MeV muon neutrino events
originating from charged kaon decay at rest ()
at the NuMI beamline absorber. These signal -carbon events are
distinguished from primarily pion decay in flight and
backgrounds produced at the target station and decay pipe
using their arrival time and reconstructed muon energy. The significance of the
signal observation is at the 3.9 level. The muon kinetic energy,
neutrino-nucleus energy transfer (), and total cross
section for these events is extracted. This result is the first known-energy,
weak-interaction-only probe of the nucleus to yield a measurement of
using neutrinos, a quantity thus far only accessible through electron
scattering.Comment: 6 pages, 4 figure
Цифровизация российской высшей школы: технологии образовательного процесса (опыт вузов Уральского федерального округа Российской Федерации)
The Russian higher school is in constant transformation, which is associated with the entry of the Russian Federation into the world market of educational services. To achieve the goals of positioning Russian universities in world rankings, various federal projects are being created, for example, within the framework of the state program “Development of Education” for 2019-2025, the project “Modern Digital Educational Environment in the Russian Federation” has been developed. To analyze the readiness of Russian universities for digital transformation, a study was conducted in which students of universities of the Ural Federal District (N = 300) took part, who evaluated the degree of implementation of various digital technologies in the educational process at the moment. It is for students as the main consumers of educational services to master the digital components of the educational process, to use technical means. The results of the study revealed the high willingness of students to work in a digital educational environment, the use of distance learning. Moreover, a higher level of readiness was demonstrated by students of technical and IT areas. At the same time, a contradiction was revealed between the readiness of students and their perception of the technical equipment of universities and the willingness of teachers to carry out the educational process in the new digital environment. Obviously, the use of centralized digital technologies (included by universities in the educational process) is significantly inferior to the students' spontaneous development of instant messengers, smartphone applications, and other software that facilitates the development of courses and disciplines (initiated by students on their own). Thus, to implement state programs to create a digital educational environment, it is necessary to strengthen the technical infrastructure of universities and improve the qualifications of teachers for the effective implementation of digitalization processes in higher education. © 2020 LLC Ecological Help. All rights reserved
Measurement of Muon Neutrino Quasi-Elastic Scattering on Carbon
The observation of neutrino oscillations is clear evidence for physics beyond
the standard model. To make precise measurements of this phenomenon, neutrino
oscillation experiments, including MiniBooNE, require an accurate description
of neutrino charged current quasi-elastic (CCQE) cross sections to predict
signal samples. Using a high-statistics sample of muon neutrino CCQE events,
MiniBooNE finds that a simple Fermi gas model, with appropriate adjustments,
accurately characterizes the CCQE events observed in a carbon-based detector.
The extracted parameters include an effective axial mass, M_A^eff = 1.23+/-0.20
GeV, that describes the four-momentum dependence of the axial-vector form
factor of the nucleon; and a Pauli-suppression parameter, kappa =
1.019+/-0.011. Such a modified Fermi gas model may also be used by future
accelerator-based experiments measuring neutrino oscillations on nuclear
targets.Comment: 5 pages, 3 figure
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