SEM Measurement of the linear dimensions of relief submicron structures by the method of “invariant” points

The Monte Carlo method is used to simulate video signals from a scanning electron microscope in backscattered electrons from slit-like structures with a rectangular profile and widths of 0.1, 0.5, and 4.0 m.Translated from Izmeritel'naya Tekhnika, No. 8, pp. 22–23, August, 1995.     

Studying the stability boundaries of the gyro-stabilized satellite on a circular orbit

Consideration was given to all parts of the stability boundaries of stationary motion of the gyro-stabilized manyaxis satellite. For each of the necessary stability conditions, conversion to zero or equality was analyzed using the second Lyapunov method. Terms of orders higher than two were used to check sign-definiteness of the Lyapunov function on the stability boundaries. Using the terms up to the sixth order, analysis established asymptotic stability on some parts of the boundaries. Terms of the order at most four enabled us to prove instability on other parts of the boundary.     

Micro- and macromodels of social networks. II. Identification and simulation experiments

The present paper focuses on identification issues of the micro- and macrocharacteristics of social networks proposed in [1]. For this, we employ data on real online social networks—Facebook, LiveJournal and Twitter. And finally, the results of corresponding simulation experiments are provided and compared.     

Effectiveness of consideration of deformations in problems of fingerprint identification

In the paper, we consider some refined methods for fingerprint recognition taking into account a distorting factor, namely, elastic deformations arising when a finger contacts with the scanner surface. We show that the consideration of elastic deformations significantly improves the quality of fingerprint recognition. Ushmaev Oleg Stanislavovich. Born 1981. Graduated from the Faculty of Mechanics and Mathematics of Lomonosov Moscow State University in 2002. Received candidate’s degree in 2004. Scientific interests: image processing, pattern recognition, biometrics. Author of 14 publications. Novikov Sergei Olegovich, Senior Researcher at the Institute of Information Problems RAS. Born in 1963. Graduated from the Moscow Institute of Physics and Technology in 1986. In 1990 finished the postgraduate study at the Institute of Information Problems, Russian Academy of Sciences. Candidate of Technical Sciences. Scientific interests: pattern recognition, image processing, mathematical modeling in biology. Author of two patents and more than 20 publications. Member of the International Scientific Societies SPI, IEEE Computer Society, IAPR.     

Wavelet-based deconvolution

A fast computational algorithm for deconvolution of signals in the form of peaks with exponentially falling fronts in the presence of noise is proposed. The filter bank coefficients are constructed on the basis of new wavelets called quasi-wavelets, which are derived from the instrument’s pulse response (instrument function) or similar functions defined analytically. A regularization procedure is offered based on selecting the sampling interval of the observed signal and the smoothing parameter of the restoring filter. This method ensures separation of completely overlapping peaks (without any noticeable saddle between them). The systematic error of restoration with an exactly known instrument function is a few tenths of a percent at three-to fourfold noise suppression.     

A two-step system for compression of microwave pulses in series-coupled resonators

A system for resonance compression of microwave pulses consists of two resonators connected in series: the first is a high-Q oversized resonator and the second is a single-mode cylindrical resonator. The time dependences of the field strength in the resonators during their excitation and the energy transfer at different values of the transfer coefficient have been determined for the 10-cm wavelength region. The results of experimental studies are presented. The output pulses are 3 ns in length and have a maximum pulse power of 1.2 GW.     

Accessory artificial circulation in complex treatment of experimental acute toxic pulmonary edema

In experiments on 50 dogs with toxic acute edema of the lung, induced with intravenous injection of 0.1% silver nitrate, the authors have studied the efficacy of accessory artificial circulation and "conservative" therapy. During the perfusion a discharge of the right portions, adequate extracorporeal gas metabolism, normalization of blood gas and acid-base balance were noted; an intensity of pulmonary edema is descreased. An intensive therapy for pulmonary edema was found to be more effective in association of "conservative" treatment with venoarterial perfusion and blood oxygenation.     

The СПРУТ-VI Instrument Complex for the Mir Orbital Station

The basic elements of the instrument package program for orbital stations are presented. The characteristics of the -VI equipment developed for the Mir orbital station within the framework of this program are described. This equipment allows the simultaneous recording of the characteristics of near-earth space (electron, proton, and nucleus fluxes, magnetic fields, and low-frequency electromagnetic waves) and their effect on the elements of spaceborne equipment and systems. The mass of the equipment is 16 kg; the power consumption is no more than 20 W.     

The effect of annealing on the properties of Ga2O3 anodic films

The effect of annealing and oxygen plasma on the electrical characteristics of gallium oxide films has been investigated. Ga₂O₃ films with thicknesses of 200–300 nm were formed by the anodic oxidation of n-GaAs wafers with the donor concentration N _d = (1–2) × 10¹⁶ cm⁻³. It is shown that, after annealing at 900°C for 30 min, the gallium arsenide films contain only the β Ga₂O₃ phase. The effect of the duration of oxygen plasma treatment prior to annealing on the nucleation of β-phase crystallites with different orientations has been studied. It has been established that the electrical conductivity of the Ga₂O₃ films can be managed by annealing and variation in the duration of oxygen plasma treatment. It is shown that the response of the V/Ni-GaAs-Ga₂O₃-V/Ni structure to a mixture exhaled by a person depends on the value and sign of the potential on the control electrode.