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 $\pi ^0$-, $\pi ^-$-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 $\pi$-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

FEATURES OF SUBMICRO- AND NANO- CRYSTALLINE STRUCTURE IN AL-LI-ALLOYS UPON MEGA PLASTIC DEFORMATION

С помощью методов просвечивающей электронной микроскопии изучено влияние химического состава сплавов системы Al-Cu-Li на образование в них нанокристаллической структуры после мегапластической деформации кручением под высоким давлением и последующего отжига. Выявлено, что размерная стабильность зеренной структуры наноструктурированных сплавов обусловлена барьерным эффектом выделяющейся гетерогенно стабильной мелкодисперсной фазы T2.The effect of chemical composition on formation of nanocrystalline structure in Al-Cu-Li alloys subjected to severe plastic deformation by high-pressure torsion and subsequent annealing is investigated by methods of transmission electron microscopy. It has been shown that size stability of nanocrystalline structure is caused by the barrier effect of the finely heterogeneously dispersed stable T2-phases

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

FEATURES OF PREOPERATIVE PREPARATION OF PATIENTS WITH DIFFERENT FORMS OF CLINICAL COURSE OF PHEOCHROMOCYTOMA

A comparative analysis of subjective and objective criterion was made in order to evaluate efficacy of preoperative preparation in 101 patients with pheochromocytoma of different clinical course. It was shown the reasonability of monitoring usage of noninvasive method of assessment of systemic hemodynamics (bio-impedance reo-vasography and daily monitoring of arterial pressure) for evaluation of preoperative preparation adequacy. The need of differentiated approach and strategy of preoperative preparation were based on clinical course of pheochromocytoma

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