Physics

Numerical Simulation of Vibronic Spectra for Polyatomic Molecules

Authors: Berezina M. K., Chernavina M. L., Novoselova A. V., Berezin V. I.

Algorithms for vibrational analysis of the excited electronic states of molecules and calculations of molecular structure at electronic excitation are described. Algorithms are realized in the form of special programs. Basic data of programs are described. All initial data for this complex are formed on the basis of the molecular dynamics and quantum models. Solution algorithms of the inverse vibronic task allowing to estimate frequencies of normal modes, force fields in the raised electronic conditions and to calculate molecular geometry changes at electronic excitation are developed.

Thermostable Tunable YIG Oscillator

Authors: Litvinenko A. N., Tikhonov V. V.

In the paper the original construction of thermostable electrically tunable microwave YIG oscillator with planar resonator in feedback loop is proposed. PCB of oscillator with tunable coil and thermocompensated system is located inside the screen of the portable magnetic system. Temperature drift YIG resonator frequency compensated temperature demagnetization of permanent magnets.

Constructive Interference of Optical Solitons in Dispersion Oscillating Fiber

Authors: Dorokhova M. A., Konyukhov A. I., Melnikov L. A., Plastun A. S.

In this article the results of numerical modeling of soliton’s collision in dispersion oscillating fiber are presented. Nonlinear Schroedinger equation for modelling was used. Different propagation regimes of the couple of solitons are considered. One of these results is merging of two solitons into high-intensity pulse.

Ecological Diagnostics of the Safety of Premises

Authors: Cherkasova O. А., Uglanova V. Z.

A study was made of the radiation background of premises of economic and household purposes under various conditions. According to the data obtained, a vertical distribution of the exposure rate of premises was revealed; the influence of external factors on its value was established. Dependences were obtained and features of radiation background changes in the rooms under study were revealed. The contribution of finishing materials to the increase in the exposure rate was found.

Optimization of Phacoemulsification in Different Forms of the Cataract in the Patients with Diabetes Mellitus

Authors: Tishkov A. S., Kamenskikh T. G., Galanga V. A., Bucharskaya A. B., Maslyakova G. N., Bashkatov A. N., Genina E. A., Kochubey V. I., Burov A. M., Tuchin V. V.

In this work, human lens pathology in different forms of the cataract was studied. Two hundred twenty patients with a cataract (220 eyes) were included in the study. Morphological, immunohystological and immunocytochemical investigations of both lens capsule and substance with antibodies to α- (α-А and α-В), β-, and γ- crystallines were carried out. Diabetic patients revealed a more pronounced expression of α- and β-B crystallin compared with a group of patients with age-related cataracts. Correlation between composition of the crystallines in a lens and its density was demonstrated.

Influence of 40%-glucose Solution on a Human Corneal Structure

Authors: Orlova A. S., Bashkatov A. N., Genina E. A., Kolbenev I. O., Kamensky I. D., Kamenskikh T. G., Tuchin V. V.

Effective treatment of the patients with postoperative corneal edema is one of the actual problems in ophthalmology. In this paper results of complex monitoring of influence of 40%-glucose solution on the state of both normal and edematous cornea after a cataract phacoemulsification on the base of date of confocal microscopy and optical coherence tomography have been presented. It has been shown that the glucose solution induces a short-term swelling of the healthy cornea and dehydration of the edematous one, as well as optical clearing of the tissue in the both cases.

Model Potentials of Intermolecular Interaction Pyridine, Skatole and Pyrrole with Water

Authors: Ten G. N., Kadrov D. M., Baranov V. I.

The calculations of the lengths of hydrogen bridge and frequencies of vibrations of bonds in the formation of hydrogen bonds skatole, pyridine and pyrrole with the water molecules in the approximation of B3LYP/6-31G(d,p). The calculations of model potentials of intermolecular interaction of the molecules on the basis of formulas Lennard–Jones and Morse, allowed to account for changes in the length of hydrogen bonds depending on the number of water molecules participating in the formation of complexes.

Statistic Characteristics of Akulinichev’s Map

Authors: Anikin V. M.

Perron – Frobenius equations for Akulinichev’s map are formulated. The autocorrelation function of the map orbits is analytically calculated. 

Model of Cardiovascular System Autonomic Regulation with a Circuit of Baroreflectory Control of Mean Arterial Pressure in the Form of Delayed-Feedback Oscillator

Authors: Ishbulatov Y. M., Karavaev A. S., Ponomarenko V. I., Prohorov M. D., Bezruchko B. P.

A mathematical model of human cardiovascular system autonomic regulation is proposed having the form of differential equation set. Some equations of the model contain terms with time delay. The spectral analysis shows that the proposed model exhibits better qualitative and quantitative coincidence with experimental data than the known models.

Nonequilibrium the Microwave Plasma of Low Pressure in Scientific Researches and Development Micro and Nanoelectronics

Authors: Yafarov R. K.

Advantages and benefits realization use of nanotechnology of high ionized low-energy microwave plasma of low pressure are described. It presents the fact that one installation on the basis of microwave plasma can replace up 4 to 5 installations with usual high-frequency excitation of the gas discharge.

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