Effect of the duration of storage on the mechanical properties of high-strength polyethylene fibers

It was shown that the mechanical properties do not change during prolonged storage of high-strength polyethylene fiber containing residual solvent.Translated from Khimicheskie Volokna, No. 1, pp. 41–42, January–February, 1995.     

Green's-function method for solving problems of nonequilibrium adsorption and convective diffusion of impurity in a medium

The Green's function method is used to solve problems of impurity transfer by a carrier-gas flow in a semiinfinite medium, taking account of convective diffusion, nonequilibrium adsorption, and radioactive decay.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 48, No. 3, pp. 450–455, March, 1985.     

Increasing the Efficiency of Dewaxing in the Deoiling Stage

During selective treatment, the content of high–melting paraffins and naphthenes that crystallize from solution when the temperature is decreased increases significantly in lube oil cuts after removal of resins and asphaltenes and polycyclic hydrocarbons with short side chains. These hydrocarbons, which have a high melting point, are removed during dewaxing to obtain low-pour lube oil cuts.     

Temperature characteristics of low-threshold high-efficiency quantum-dot lasers with the emission wavelength from 1.25 to 1.29 µm

The temperature behavior of the operation characteristics of low-threshold (the threshold current density is below 100 A/cm²) high-efficiency (differential quantum efficiency is as high as 88%) injection laser heterostructures is studied. The active region of structures emitting in the range from 1.25 to 1.29 μm included two, five, and ten layers of InAs-GaAs quantum dots. It is shown that both the threshold current density and the external differential quantum efficiency become N-shaped functions of temperature as the distribution of carriers in the active region changes from nonequilibrium to equilibrium one. __________ Translated from Fizika i Tekhnika Poluprovodnikov, Vol. 37, No. 10, 2003, pp. 1270–1273. Original Russian Text Copyright ? 2003 by Novikov, Maksimov, Shernyakov, Gordeev, Kovsh, Zhukov, Mikhrin, Maleev, Vasil’ev, Ustinov, Alferov, Ledentsov, Bimberg.     

Choosing the setting parameters of an automatic regulator for controlling a floating device

A procedure is proposed which is based on the method of extended frequency characteristics and the principle of searching for values of setting parameters of regulators involving personal computer hardware and software. Translated from Izmeritel'naya Tekhnika, No. 2, pp. 19–21, February, 1998.