Физико-математические модели и методы расчета воздействия мощных лазерных и плазменных импульсов на конденсированные и газовые среды
In this paper, the basic notions of ultrametric (p-adic) description of protein conformational dynamics and CO rebinding to myoglobin are presented. It is shown that one and the same model of the reaction — ultrametric diffusion type describes essentially different features of the rebinding kinetics at high-temperatures (300÷200 K) and low- temperatures (180÷60 K). We suggest this result indicates a special structural order in a protein molecule. Besides all the other structural features, it is organized by such a way that its conformational mobility changes self-similarly from room temperature up to the cryogenic temperatures.
The paper presents experimental data on the effects of the flow of atomic oxygen (AO) for highly filled composites of high impact polystyrene (HIPS) and superfine silicon-organic filler. The coefficients of erosion after exposure to AО, by scanning electron microscopy of the composites was studied relief after irradiation. Also in the paper, the physical and mathematical modeling of erosion processes on the basis of the data.
The models of electro-physical effects built-into Sentaurus TCAD have been tested. The models providing an adequate modeling of deep submicron high-k MOSFETs have been selected. The gate and drain leakage currents for 45 nm MOSFET with PolySi gate and SiO2, SiO2/HfO2 and HfO2 gate dielectrics have been calculated using TCAD. It has been shown that the replacement of traditional SiO2 by an equivalent HfO2 dielectric considerably reduces the gate leakage current by several orders due to elimination of the tunneling effect influence. Besides, the threshold voltage, saturation drain current, mobility, transconductance, etc. degrade witahin 10-20% range.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.