Viscoelastic characteristics of mixed compositions based on polyethylene and polypropylene

VNIISV, Tver'. Institute of Chemical Physics, Moscow. Translated from Khimicheskie Volokna, No. 3, pp. 42–43, May–June, 1992.     

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.     

Personal computer program for the investigation of crude oils

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 9, pp. 1112, September, 1993.     

Corrosion,Mechanical and Catalytic Properties of Coatings Based on FeNiCrWMoCoCB Metallic Glasses

Protection of Metals and Physical Chemistry of Surfaces - This work is devoted to the deposition of coatings based on FeNiCrWMoCoCB metallic glasses on a surface made of 35 steel; the deposition is...     

Dynamics of the thermovoltaic effect in SmS

The thermovoltaic effect in the semiconductor rare-earth compound samarium sulfide (SmS) is briefly described. The qualitative dynamic model of the effect for explaining the possibility of the long-term electric voltage generation on the basis of the thermovoltaic effect is proposed. The model uses a combination of thermal and electronic processes.     

Investigation of continuous-wave and Q-switched microchip laser characteristics of Yb:YAG ceramics and crystals

Continuous-wave and passively Q-switched microchip laser performance of Yb:YAG ceramics and single-crystals was investigated. Highly efficient continuous-wave Yb:YAG laser performance was observed at 1030 nm and 1049 nm for both Yb:YAG ceramics and crystals with different transmissions of output couplers. The laser performance of Yb:YAG ceramic is comparable to that of Yb:YAG single crystal. Meanwhile, the laser performance of laser-diode pumped Yb:YAG/Cr⁴⁺:YAG all-ceramics- and all-crystals-combination passively Q-switched microchip lasers were investigated. Sub-nanosecond laser pulses with peak power over 150 kW were obtained with different Yb:YAG/Cr⁴⁺:YAG combinations. Linearly polarized laser was observed in Yb:YAG/Cr⁴⁺:YAG all-crystals combination and circular polarized laser was obtained in Yb:YAG/Cr⁴⁺:YAG all-ceramics combination. The best laser performance was obtained with Yb:YAG/Cr⁴⁺:YAG all-crystals combination.