Chain-thermal explosion and degree of ionization of hydrogen-air flames

Using a passive probe to record the accumulation of electrical noise signals of hydrogen-air flames, it is established that within the concentration limits of intense combustion of these mixtures, which are approximately 18–60% (vol.) hydrogen and are due to the interaction mechanism in the burning mixtures, there is a considerable increase in the degree of flame ionization.Translated from Fizika Goreniya i Vzryva, Vol. 41, No. 1, pp. 15–23, January–February, 2005.     

Immunocomputing for intelligent signal processing

Based on immunocomputing (IC), this paper describes an approach to intelligent signal processing. The approach includes both low-level feature extraction and high-level (intelligent) pattern recognition. The key model is the formal immune network (FIN), which includes apoptosis (programmed cell death) and immunization and controls them by cytokines (messenger proteins). Such FIN can be formed from the signal or combination of signals using discrete tree transform, singular value decomposition and the proposed index of inseparability as a measure of quality of FIN. Several comparisons with neural computing and support vector machines suggest that IC may outperform state of the art approaches to intelligent signal processing.     

Effect of the composition of the binder on the mechanical indexes of microplastics made from Lavsan fibre

Impregnation of Lavsan fibres not only increases the strength characteristics and thermal stability of samples of microplastics but also increases the dimensional stability of the fibres on heating. The structural analysis of disorientation of the crystallites in the Lavsan fibres in microplastics shows that increasing the oligourethane acrylate (OUA) content decreases the disorientation of the crystallites, which also explains the course of the shrinkage curves relative to the texture axis. __________ Translated from Khimicheskie Volokna, No. 5, pp. 26–28. September–October, 2007.     

Efficiency of radioluminescence of water under the action of accelerated electrons

The efficiency of radioluminescence (～1.7 × 10^?6) of distilled water has been measured under normal conditions. A beam of accelerated electrons with an energy of up to 230 keV was used to excite the water luminescence. This light was guided through a quartz optical fiber to the photocathode of a photomultiplier. The detecting system was calibrated with a standard ribbon lamp. The dose absorbed in water was recorded with film dosimeters.     

Ferroelectricity in SrTiO3: Pb

Dielectric study of phase transitions in SrTiO₃ -PbTiO₃ ceramic samples with PbTiO₃ content x ranging from 0.002 up to 0.3 is reported. It is shown that there is a ferroelectric phase transition for x value as low as 0.005. At low x the transition temperature T_C varies as (x-x_c)^1/2 with x_c = 0.002.     

The participation of the GABAergic system of the brain in shaping the breathing rhythm

I.v. administration of sodium hydroxybutyrate induced periodic apneustic breathing with inspiratory arrests in anesthetised cats. Bilateral vagotomy did not change respiratory or circulatory parameters under these conditions. Administration of the same agent into both nuclei tractus solitarii induced similar effects, as well as administration of the GABA agonist baclofen. The data obtained suggest that the medullary GABA-ergic system takes an active part in generation of the respiration rhythm.     

Thermooxidative decomposition of nitrile copolymers containing itaconic acid units

IR spectroscopy showed that in nitrile copolymers and fibres containing units based on itaconic acid, these units can exist in different modifications. The formation and set of modifications are a function of the conditions of preparation of the copolymer and fibre, especially their hydrophilicity. The existence of different modifications of itaconic acid fragments (in both the initial samples and in the samples formed in the initial stages of heat treatment) affects the rate of the subsequent processes of thermooxidative decomposition of the objects and the set of polyconjugated systems formed and consequently also the supermolecular structure. These findings should be taken into consideration both in the analysis of the corresponding copolymers and in the technology of their fabrication and processing.St. Petersburg State University of Technology and Design. Translated from Khimicheskie Volokna, No. 6, pp. 20–23, November–December, 1993.