Experimental study of the transverse circulation of liquid in the riparian region of a turbulent channel flow
Experimental study of the transverse circulation of liquid in the riparian region of a turbulent channel flow
O.N. Mel'nikova
We present a method for the study of the circulation of liquid which uses a thermohydrometer and the Pitot tube. The method makes it possible to observe the existence of a transverse circulation in the riparian region of a direct channel flow.
Show AbstractПамяти Анатолия Александровича Предводителева (28.1.1925—8.11.1982)
Памяти Анатолия Александровича Предводителева (28.1.1925—8.11.1982)
В.Л. Бонч-Бруевич, Н.Б. Брандт, Л.В. Левшин, А.И. Осипов, Е.В. Ступоченко, Н.А. Тяпунина, Л.П. Филиппов, В.С. Фурсов, Ф.В. Шугаев
А.А. Предводителев родился 28 января 1925 г. в Москве, в семье физиков — сотрудников Московского университета...
Show AbstractПамяти Сергея Николаевича Вернова
Памяти Сергея Николаевича Вернова
Редколлегия
26 сентября 1982 г. скончался выдающийся советский ученый и организатор советской науки, директор НИИЯФ МГУ акад. С.Н. Вернов…
Show AbstractEffect of solvation on the diffusion of benzocarbolyn molecules in alcohol solutions
Effect of solvation on the diffusion of benzocarbolyn molecules in alcohol solutions
L.V. Levshin, B.D. Ryzhikov, N.R. Senatorova, G.v. Simonov, A.N. Tikhonov
An analysis of temperature deformations of the EPR spectrum of alcohol solutions of benzocarboline is used to prove the necessity of taking into account solvation of solute molecules in the calculation of the diffusion coefficient. We suggest a method for estimating the energy of interaction of the solute and solvent molecules based on an analysis of radiospectroscopic data.
Show AbstractA priori estimates in the problems of synthesis of layered media
A priori estimates in the problems of synthesis of layered media
A.V. Tikhonravov
We estimate the energy transmission coefficient of a layered medium and its rate of change in terms of parameters of the layered medium: its thickness, permissible limits of change of its wave impedance, etc. With application to the synthesis of multi-layered optical coverings, we discuss the use of a priori estimates in the specification of the synthesis, and in concrete calculations using synthesis programs to determine the useful regions of the parameters.
Show AbstractA study of the entrainment process in the self zone of the sea
A study of the entrainment process in the self zone of the sea
N.K. Shelkovnikov, V.V. Timofeev
We study the variability of the thermal structure in a coastal zone of the sea as a result of the entrainment mechanism. We estimate the magnitude of terms in the equation for the energy balance, and the empirical coefficient in the relation $E=kRi^{-n}$.
Show AbstractLimiting sensitivity of quantum test systems
Limiting sensitivity of quantum test systems
F.Ya. Khalili
In the observation of classical force from the response of a quantum test system, the generalized coordinate operator of the quantum system does not commute with the operator whose measurement corresponds to the optimal observation procedure. According to the uncertainty relations, the sensitivity of the test system therefore increases with increasing level of fluctuations of its coordinate.
Show AbstractPreequilibrium emission of photonucleons and the method of quantum Green's functions
Preequilibrium emission of photonucleons and the method of quantum Green's functions
F.A. Zhivopistsev, A.K. Deb, A.M. Slivnoi
It is shown that for $E_{\gamma}\le 50$ MeV, the $T_{\gamma N}$ matrix of the reaction $(\gamma,N)$ can be expressed in terms of the vector vertex $\tau [n+1]$: $\tau_{\gamma}[n+1]=V_{\gamma}GG\Gamma_{2,n+1}$ where $V_{\gamma}$ is the vertex of noninteracting nucleons with respect to the field of the gamma quantum, and $\Gamma_{2,n+1}$ is the full vertex part (total interaction amplitude). We obtain the renormalized equations for $\Gamma_{2,n+1}$, which contain the products of polar single-particle Green's functions G and the effective interactions amplitudes $\Gamma_{2,n+1}$. The T matrix of the reaction $(\gamma,N)$ can be decomposed into two parts. One part describes a direct multistep nuclear photoeffect (without formation of the compound nucleus), and the other part describes a resonant multistep nuclear photoeffect (via intermediate states of the compound nucleus). After statistical averaging, we obtain expressions for $|T_N|^2$ which describe a $(\gamma,N)$ reaction for the energies of the gamma quanta $E \le 50$ MeV.
Show AbstractAnalysis of high-resolution NMR spectra
Analysis of high-resolution NMR spectra
V.S. Tumanov
We consider in a general form, the methods of assignment of NMR spectra of an arbitrary type $A_iB_kC_lD_n$... It is shown that, under specific conditions, the method of repeating intervals and the double-resonance method make it possible to make a unambiguous assignment of the spectrum. We consider an optimum method of assignment with a combined application of the rule of repeating interval and the double resonance.
Show AbstractEffect of the oxygen parameter on the Curie point of spinel ferrites
Effect of the oxygen parameter on the Curie point of spinel ferrites
V.I. Nikolaev, V.S. Rusakov, N.I. Chistyakova
The method of molecular orbitals is used to show that a change in the oxygen parameter of a ferrite with the spinel structure affects considerably its Curie point. This factor must be taken into account in the search for improvement of the magnetic properties of spinel ferrites, together with such factors as the number of exchange bonds and the electron configuration of cations which participate in the exchange interactions.
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