131 research outputs found
Elliptical motions of stars in close binary systems
Motions of stars in close binary systems with a conservative mass exchange
are examined. It is shown that Paczynski-Huang model widely used now for
obtaining the semi-major axis variation of a relative stars orbit is incorrect,
because it brings about large mistakes. A new model suitable for elliptical
orbits of stars is proposed. Both of reactive and attractive forces between
stars and a substance of the flowing jet are taken into account. A possibility
of a mass exchange at presence of accretion disk is considere
Analysis of hadron production in nucleus-nucleus interactions up to and out of kinematical limit of free NN-collisions in the frame of FRITIOF model
In the framework of the modified FRITIOF model, the inclusive spectra of the
cumulative -, -mesons and protons produced in the
nucleus-nucleus interactions at 4.5 GeV/c/nucleon and 4.2 GeV/c/nucleon are
calculated. It is shown that the model reproduces qualitatively, and in some
cases quantitatively the main experimental regularities of -mesons
production, and "soft" part of the proton spectra. According to the model the
production of the cumulative particles is connected with the mechanism of the
"soft" nucleon-nucleon interaction.Comment: 12 pages, 11 figure
Three-dimensional coherent X-ray diffraction imaging of a ceramic nanofoam: determination of structural deformation mechanisms
Ultra-low density polymers, metals, and ceramic nanofoams are valued for
their high strength-to-weight ratio, high surface area and insulating
properties ascribed to their structural geometry. We obtain the labrynthine
internal structure of a tantalum oxide nanofoam by X-ray diffractive imaging.
Finite element analysis from the structure reveals mechanical properties
consistent with bulk samples and with a diffusion limited cluster aggregation
model, while excess mass on the nodes discounts the dangling fragments
hypothesis of percolation theory.Comment: 8 pages, 5 figures, 30 reference
П. А. Куприянов и его работа в Первом Ленинградском медицинском институте: «С глубоким проникновением в детали избранной специальности»
Since 1926, Peter Andreevich Kupriyanov served at Z.P. Solovyov Central Red Army Military Hospital of Leningrad and simultaneously began to work part-time at Pavlov First Medical Institute of Leningrad. This article talks about the work of P.A. Kupriyanov at The First Medical Institute of Leningrad from 1926 to 1948.С 1926 г. Петр Андреевич Куприянов служит в Ленинградском Центральном Красноармейском Военном госпитале им. З. П. Соловьева и, одновременно по совместительству, начинает работать в Первом Ленинградском медицинском институте им. акад. И. П. Павлова. В настоящей статье отражена работа П. А. Куприянова в 1-м ЛМИ в период с 1926 по 1948 г
Экстремальные кривые конформного пространства и одного из связанных с ним расслоений
Time-like and null extremal curves are computed in the conformal space for bundles with fibers P5 and
P5 ^ P5Вычислены экстремальные временеподобные и изотропные кривые конформного пространства для
расслоений со слоями P5 и P5 ^ P5
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