Frequency multiplication in a nonlinear resistance with a supplementary tuned circuit
Frequency multiplication in a nonlinear resistance with a supplementary tuned circuit
E.Z. Zemlyachev, N.K. Maneshin, and V.N. Parygin
The maximum attainable conversion efficiency η_n of n-fold frequency multiplication in an exponential resistance with a supplementary circuit tuned to the k-th harmonic is always less than when there is no such circuit. The influence of the supplementary circuit is least when its resistance is either very small or very large. If k
Nonlinear effects when transverse waves propagate in a homogeneous unbounded plasma
Nonlinear effects when transverse waves propagate in a homogeneous unbounded plasma
B. Chakraborti
A nonlinear theory is developed for the propagation of elliptically polarized waves in a homogeneous unbounded plasma, based on Vlasov's equations.
Show AbstractThe refraction of normal waves in a wedge
The refraction of normal waves in a wedge
V.K. Kuznetsov
Calculations are given which describe the refraction of normal waves in a wedge. The results of these calculations are in good agreement with experiment, as can be seen from the accompanying oscillogram.
Show AbstractSynthesis of a self-adjusting tracking system
Synthesis of a self-adjusting tracking system
I.V. Nekrasov and V.I. Shmal'gauzen
The optimal tracking of a differential type random signal with drift is examined. A noisy communication channel with one unknown parameter is assumed. A close-to-optimal system using self-adjustment to the unknown parameter is shown to be synthesizable. This system is analyzed approximately, and electronic simulation of it is described.
Show AbstractThe angular distribution function of electrons in a shower with arbitrary boundary conditions
The angular distribution function of electrons in a shower with arbitrary boundary conditions
A.K. Bakhtadze
A solution of the equations of electromagnetic cascade theory in the small angle approximation of multiple scattering with arbitrary bound ary conditions is described. The cross sections of the basic processes of retarded radiation and pair formation are taken in the Bethe-Heitler form, and the polarization of the medium is taken into account. The solution for the primary electron is examined and justified for finite values of the ratio E/E0.
Show AbstractAsymptotic properties of green's function for a coulomb system involving collisions
Asymptotic properties of green's function for a coulomb system involving collisions
V.N. Mel'nikov
An approximation for the kernel of the linearized Lenard equation is obtained and used to obtain an expression for the Green's function. The asymptotic value of this for small к is obtained exactly, together with the eigenfrequencies and damping of the system when spatial dispersion is present. An asymptotic value for the spectral density is derived.
Show AbstractMean radiation patterns and losses of antenna gain
Mean radiation patterns and losses of antenna gain
R.M. Golynskaya
The displacement of the maximum of the mean radiation pattern relative to the maximum when there are no random variations in the amplitude and phase distribution of the antenna sources is derived. The theoretical results agree with the experimental data given in [1].
Show AbstractCertain problems of the statistical theory of a crystal
Certain problems of the statistical theory of a crystal
V.A. Golovko
A new method of solving Vlasov's equation for a crystal is examined. The advantage of this method is that it is possible in some cases to obtain a solution of this equation in finite form for any temperature, which does not contain series. In other cases the solution of the equa tion is found in the form of a series for a certain small parameter which does not contain the temperature. This method enables the solutions obtained by Vlasov for two limitiag cases to be connected.
Show AbstractMagnetic transition in nickel-zinc ferrites with a large zinc content
Magnetic transition in nickel-zinc ferrites with a large zinc content
A.N. Goryaga and Si. Shrinivasan
It is established that the paraprocess and the blurring of the magnetic transitiorr at the Curie point in nickel-zinc ferrites $Ni_(1-x)Zn_xFe_2O_4$ having a large zinc content increase considerably in comparison with ferrites containing small amounts of zinc. Apparently the reason for this is an increase in the exchange interaction between sublattices. Using the method of thermodynamic coefficients we have determined more accurate values for the Curie temperature of nickel-zinc ferrite systems. This enabled us to establish that there is no ferromagnetism in this system when x = 0.81, and not when x= =0.16 as stated in [5).
Show AbstractThe effect of the dielectric constant of a solvent on the development of the association of dye molecules
The effect of the dielectric constant of a solvent on the development of the association of dye molecules
L.V. Levshin and T.D. Slavnova
The effect of the dielectric constante of the solvent on the association of molecules of the dye rhodamine-6G was studied by means of elec tron and vibration absorption spectra. It is shown that under otherwise equal conditions a reduction in the e of the medium leads to a rein forcement of the association of dye molecules. This coofirms the cor rectness of the assumption that in concentrated solutions there is an amalgamation of ion pairs of the dye.
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