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1.
An analysis is made of a method of determining the parameters and coordinates of atmospheric gas clouds radar systems which
can measure the attenuation of electromagnetic radiation power at a resonant absorption frequency. A possible technical application
of these systems is indicated. This approach to the problem of controlling and monitoring the state of the atmosphere can
describe the propagation dynamics of contamination in real time, which is extremely important for ensuring safety in regions
liable to chemical contamination. After suitable development, the proposed method may provide the basis for remote monitoring
by radar techniques and in principle, may also be used to study various types of nonreflecting objects possessing the property
of resonant absorption.
Pis’ma Zh. Tekh. Fiz. 23, 1–5 (December 26, 1997) 相似文献
2.
A. S. Gouralnik N. G. Galkin V. A. Ivanov M. V. Ivanchenko E. A. Chusovitin 《Instruments and Experimental Techniques》2007,50(3):408-410
The design of a simple pulse-type evaporator ensuring a high rate (up to ~104 nm/s) of deposition of thin films (0.01–100 nm thick) onto a solid surface in ultrahigh vacuum is described. The evaporation pulse is created by discharge of a capacitor bank via a fast-response evaporator produced from a tungsten foil. Results illustrating the efficiency of this device are presented. 相似文献
3.
Statistical processing methods for shock wave experimental data are developed to be applied in the software complex TEFIS
on thermophysical calculations of thermophysical properties of substances. Methods of increasing the precision of the wide-range
shock adiabates calculation are developed based on them and the original calculation models for Hugoniot adiabates. 相似文献
4.
M. V. Ivanchenko E. A. Borisenko V. G. Kotlyar O. A. Utas V. V. Ustinov V. G. Lifshits 《Technical Physics Letters》2006,32(5):396-398
The formation of iron disilicide (β-FeSi2) nanoclusters as a result of solid-state epitaxy at T = 500–700°C and an iron coverage of 0.05–0.5 monolayer on a boron-modified Si(111)√3 × √3 R30° surface has been studied by scanning tunneling microscopy. It is established that the number density of β-FeSi2 nanoclusters on the Si(111) √3 × √3 R30°-B surface significantly exceeds the density of silicide clusters formed on the atomically clean Si(111) surface with a 7 × 7 reconstruction for the analogous iron coverages and annealing temperatures. At the same time, the density of point defects and clusters possessing metallic conductivity on the Si(111) √3 × √3 R30°-B surface is several orders of magnitude lower than on the Si(111)7 × 7 surface treated under identical conditions. 相似文献
5.
Elena V. Mitroshina Maria M. Loginova Roman S. Yarkov Mark D. Urazov Maria O. Novozhilova Mikhail I. Krivonosov Mikhail V. Ivanchenko Maria V. Vedunova 《International journal of molecular sciences》2022,23(2)
Ischemic brain injury is a widespread pathological condition, the main components of which are a deficiency of oxygen and energy substrates. In recent years, a number of new forms of cell death, including necroptosis, have been described. In necroptosis, a cascade of interactions between the kinases RIPK1 and RIPK3 and the MLKL protein leads to the formation of a specialized death complex called the necrosome, which triggers MLKL-mediated destruction of the cell membrane and necroptotic cell death. Necroptosis probably plays an important role in the development of ischemia/reperfusion injury and can be considered as a potential target for finding methods to correct the disruption of neural networks in ischemic damage. In the present study, we demonstrated that blockade of RIPK1 kinase by Necrostatin-1 preserved the viability of cells in primary hippocampal cultures in an in vitro model of glucose deprivation. The effect of RIPK1 blockade on the bioelectrical and metabolic calcium activity of neuron-glial networks in vitro using calcium imaging and multi-electrode arrays was assessed for the first time. RIPK1 blockade was shown to partially preserve both calcium and bioelectric activity of neuron-glial networks under ischemic factors. However, it should be noted that RIPK1 blockade does not preserve the network parameters of the collective calcium dynamics of neuron-glial networks, despite the maintenance of network bioelectrical activity (the number of bursts and the number of spikes in the bursts). To confirm the data obtained in vitro, we studied the effect of RIPK1 blockade on the resistance of small laboratory animals to in vivo modeling of hypoxia and cerebral ischemia. The use of Necrostatin-1 increases the survival rate of C57BL mice in modeling both acute hypobaric hypoxia and ischemic brain damage. 相似文献
6.
Bernstein (1967) suggested that people attempting to learn to perform a difficult motor task try to ameliorate the degrees-of-freedom problem through the use of a developmental progression. Early in training, people maintain a subset of their control parameters (e.g., joint positions) at constant settings and attempt to learn to perform the task by varying the values of the remaining parameters. With practice, people refine and improve this early-learned control strategy by also varying those parameters that were initially held constant. We evaluated Bernstein's proposed developmental progression using six neural network systems and found that a network whose training included developmental progressions of both its trajectory and its feedback gains outperformed all other systems. These progressions, however, yielded performance benefits only on motor tasks that were relatively difficult to learn. We conclude that development can indeed aid motor learning. 相似文献
7.
8.
Yu. M. Milekhin D. N. Sadovnichii S. A. Malinin V. K. Ivanchenko V. L. Klochikhin S. A. Gusev 《Fibre Chemistry》2009,41(1):56-59
The elevated radiation resistance of a microplastic based on Rusar fibres even in combined exposure to ionizing radiation
and mechanical loading was demonstrated. This is probably due to the high degree of orientation of the polymer fibres, so
that radiation chemical decomposition reactions are suppressed and the purely thermal effect of the radiation is experimentally
recorded.
Translated from Khimicheskie Volokna, No. 1, pp. 47-49, January-February, 2009. 相似文献
9.
10.