Determination of wave dispersion in open periodic structures by the probing source method
Determination of wave dispersion in open periodic structures by the probing source method
V.I. Kanavets, A.I. Slepkov, A.V. Fyodorov
A method is presented for the theoretical determination of wave dispersion in open periodic structures which does not require solving the dispertion equation. This method can be applied to physical processes in systems typical of relativistic SHF electronics.
Show AbstractThe envelope distribution function and noise immunity in reception of multy-path signals
The envelope distribution function and noise immunity in reception of multy-path signals
L.N. Arefyeva, Yu.V. Berezin
A general formula is derived for the envelope distribution function $W(A)$ superposition of $N$ coherent fields. The results are used to solve the problem of noise immunity in the reception of data transmitted over an ionospheric channel.
Show AbstractProcessing the probe current-voltage characteristics with consideration for the electron drain to the probe
Processing the probe current-voltage characteristics with consideration for the electron drain to the probe
L.M. Volkova, A.M. Devyatov, M.A. Mal'kov, V.S. Nikolaev
It is shown that in conducting probe measurements in He discharge plasma, the drain parameter can be assumed energy independent and equal to $\delta=\delta (kT_e)$ to a good accuracy. When the measurements are carried out in discharge plasma in Ramsauer gases Ar, Kr and Xe, the neglect of the drain parameter energy dependence leads to an error of about 50-70% in the determination of both the mean energy of electrons and their concentration.
Show AbstractNumerical analysis of energy migration in a model of a photosynthetic unit
Numerical analysis of energy migration in a model of a photosynthetic unit
A.A. Demidov, E.A. Chernyavskaya
This paper considers a model problem of the dependence of the efficiency of energy transfer between various forms of Chlorophyll a in a photosynthetic unit on the number of the forms without taking into account spatial heterogeneity in the distribution of these forms within the photosynthetic unit or spatial orientation of Chlorophyll a molecules.
Show AbstractThe monochromatically pumped double-wave solid-state laser
The monochromatically pumped double-wave solid-state laser
V.E. Nadtocheev, O.E. Nanii
The characteristics of a $YAG:Nd^{3+}$ double-wave solid-state laser with monochromatic pumping were studied. Highly stable double-wave lasing was obtained at wavelengths $\lambda_1$ = 1.064 $\mu$m and $\lambda_2$ = 1.318 $\mu$m when a nonlinear-loss element was introduced into the cavity. It was shown that the intensity of generated waves can be controlled by changing the temperature of the active element.
Show AbstractOn a possible mechanism of spectrum detection in molecular computers
On a possible mechanism of spectrum detection in molecular computers
A.S. Mikhailov, I.Yu. Poteryaiko
A possible mechanism of detecting spectra in molecular computers is suggested. The mechanism is based on particle tunneling along the molecular chain in which the potential profile depends on the spectrum of incident radiation. The tunneling factor is calculated for the elementary potential profile with a finite number of barriers and gaps between them.
Show AbstractStudy of the structure of heterogeneous dye associates in binary solvents
Study of the structure of heterogeneous dye associates in binary solvents
L.V. Levshin, A.M. Saletskii
The luminescence spectrum characteristics of solutions of rhodamine dyes with methylene blue in binary solvents have been studied. It is shown that processes of their heterogeneous association depend on the size and composition of the solvation shells of the dye molecules. A mechanism is suggested which explains loss of the fluorescence ability by heterogeneous associates of the dyes studied.
Show AbstractWide-band ultrasonic spectroscopy of colloidal media on the basis thermooptical acoustic generator
Wide-band ultrasonic spectroscopy of colloidal media on the basis thermooptical acoustic generator
A.A. Karabutov, M.P. Matrosov, N.B. Podymova, V.A. Pyzh
A scheme of wide-band acoustic spectrometer is proposed for investigating the dynamic properties of condensed media. To produce acoustic pluses use is made of an optoacoustic generator with thermooptical sound excitation. The frequency dependence of acoustic absorption in water suspensions of bentonite clays in the 1-14 MHz range has been obtained and the relaxation parameters of these suspensions have been calculated.
Show AbstractMagnetization of neodymium-yttrium garnet ferrites
Magnetization of neodymium-yttrium garnet ferrites
K.P. Belov, N.V. Volkova, L.A. Skipetrova
Magnetization of five single crystals of the $Nd_xY_{3-x}Fe_5O_{12}$ ($x$ = 0.0, 0.5, 0.95, 1.39, and 1.72) system was studied in the temperature range from 4.2 К to the Curie temperature. The measurement results suggest that at the helium temperature the [110], [111] and [100] crystallographic directions are the easy, intermediate, and the hard magnetization directions, respectively. The argeement of the experementally found magnetization values with those calculated by the Neel theory is found to be fairly good on the assumption that an uncollinear magnetic structure is formed in these compounds at temperatures below 77 K.
Show AbstractGauge model for the fifth force
Gauge model for the fifth force
G.A. Sardanashvily, E.G. Timoshenko
In this paper the Lagrangian and the gauge model equations are constructed for the fifth fundamental interaction and the related corrections to the Newtonian potential are calculated.
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