Metrological provision of infrasound level measurements
Metrological provision of infrasound level measurements
V.A. Gordienko, B.I. Goncharenko
It is demonstrated that the response of the vibratory systems of living organisms to acoustic effects depends not only on the sound pressure level (which is predominantly subject to sanitary regulations), but also on the vibration velocity of the particles moving under the sound pressure gradient and the amplitude of their displacement from the equilibrium position. The conclusion is therefore drawn that to correctly regulate sound levels in the low-frequency region, it is necessary to measure simultaneously the sound pressure and the vibration velocity of the particles of the medium.
Show AbstractThe role of heavy metals in the formation of protein clusters in aqueous solutions
The role of heavy metals in the formation of protein clusters in aqueous solutions
G.P. Petrova, Yu.M. Petrusevich, A.N. Evseevicheva
The formation of macromolecular protein clusters in the presence of heavy metal ions was discovered using the Rayleigh scattering technique. The conditions attending the formation and destruction of such clusters are studied. It is demonstrated that the mass of the clusters is a maximum at the isoelectric point of the protein and increases with the increasing of ionic strength of the solution. The formation of protein clusters in the presence of toxic heavy metal ions in living cells is of substantial physiological and ecological importance. The molecular mechanism is discussed whereby such clusters are formed.
Show AbstractОб импульсном намагничивании монокристаллов бората железа
Об импульсном намагничивании монокристаллов бората железа
О.С. Колотов, А.П. Красножон, В.А. Погожев
Впервые исследуется режим импульсного намагничивания бората железа. Показано, что кривая импульсного намагничивания состоит из двух участков. Излом кривой вызван уменьшением потерь энергии на возбуждение магнитоупругих колебаний, которое в свою очередь обусловлено "замораживанием" кристаллической решетки, когда длительности основной стадии переходного процесса меньше $13\div17$ нс.
Show AbstractРасчет упругих постоянных металлов с гексагональной плотной упаковкой
Расчет упругих постоянных металлов с гексагональной плотной упаковкой
В.М. Силонов, И.А. Гляненко
Методом модельного потенциала в гармоническом приближении с учетом взаимодействия до четвертой координационной сферы проведен расчет упругих постоянных Mg, Zr и Ti. Как в случае Mg, так и в случае переходных металлов Zr и Ti рассчитанные значения упругих постоянных оказались близкими к экспериментальным. Для Zr и Ti наиболее близкими к экспериментальным оказались значения упругих постоянных $C_{12}$, $C_{13}$, $C_{33}$, а для $C_{11}$ и $C_{44}$ расхождения составили около 20%.
Show AbstractРасчет и визуализация полей Холла в замагниченных проводящих пластинках методом конформного отображения
Расчет и визуализация полей Холла в замагниченных проводящих пластинках методом конформного отображения
В.И. Иванов
Задача о распределении электрического тока в замагниченной пластинке с двумя протяженными электродами на границе решается методом конформного отображения на параллелограмм. Рассмотрены случаи вырождения одного или обоих электродов в точку. Построены картины линий тока и эквипотенциалей электрического поля в прямоугольных и круглых пластинках.
Show AbstractCoulomb excitation of diatomic molecules slowly sliding over crystal surfaces
Coulomb excitation of diatomic molecules slowly sliding over crystal surfaces
V.A. Borzilov$^1$, V.V. Zatekin$^1$, V.V. Komarov$^1$, A.M. Popova$^1$, H. Jungclas$^2$
A theoretical model of a vibrational Coulomb resonance excitation of diatomic molecules sliding at velocities of $10^5$-$10^7$ cm/s over crystal surfaces is suggested. The surface field is represented by the sum of periodic potentials with frequencies proportional to the initial molecule velocities. As an example, the probability of vibrational excitation of the CO and NO molecules is calculated at the level of first-order nonstationary perturbation theory.
Show AbstractEffective rank of the cochlea mathematical model
Effective rank of the cochlea mathematical model
S.N. Kachalo, Yu.P. Pyt'ev
A mathematical model of the hearing organ's cochlea is considered as an operator transforming the time signal into the space-time form, and its effective rank is examined.
Show AbstractPotentials of a dissipative waveguide and their application
Potentials of a dissipative waveguide and their application
P.A. Krutitskii
A singular solution to the two-dimensional dissipative Helmholtz equation in a strip under zero boundary conditions on the walls is considered. The solution, which is constructed by the reflection method, is represented as a series where one term is a fundamental solution to the Helmholtz equation on the plane and the other terms are smooth solutions to the Helmholtz equation in a strip. It is shown that the series formed by smooth solutions is an infinitely differentiable function. Based on the constructed singular solution, the potentials of the single and double layers and the angular potential in a strip are constructed. It is proved that the properties of the strip potentials are determined by the behavior of the well-studied potentials constructed based on the fundamental solution to the Helmholtz equation.
Show AbstractFinslerian approach to quantized field theory: positivity of scalar field energy and generalization of Pauli-Jordan functions
Finslerian approach to quantized field theory: positivity of scalar field energy and generalization of Pauli-Jordan functions
G.S. Asanov
On the basis of Finslerian Hamiltonian function, the real scalar field is considered. It is shown that the use of the special-relativistic Finslerian metric function leads to positivity of field energy. The Finslerian extension of the Pauli-J"ordan function is proposed to derive the required commutators and the relationship between the amplitudes $u^\pm(\textbf{k})$ and $u^\pm(k)$.
Show AbstractEffect of the SHF-field transversal inhomogeneity on the operation of a maser with a band-like beam based on the anomalous Doppler effect
Effect of the SHF-field transversal inhomogeneity on the operation of a maser with a band-like beam based on the anomalous Doppler effect
A.F. Aleksandrov, V.A. Kubarev, A.V. Mikhailov
Effect of the SHF-field transversal inhomogeneity on the electron interaction with radiation in a maser with a plane slow-wave structure and a band-like beam in the case of anomalous Doppler effect has been studied. Amplification conditions as a function of a guiding magnetic field have been also studied.
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