A new integral equation for calculating thin electric vibrators

A new singular integral equation describing the current distribution in a thin electric vibrator is derived, which provides for a mathematically correct calculation of this radiating system.     

Dislocation-motion instability in a vacancy-saturated crystal

Fast Reactor Research Institute, Academy of Sciences of the USSR. Translated from Atomnaya Énergiya, Vol. 70, No. 5, pp. 335–339, May, 1991.     

Lattice-matched GaInPAsSb/InAs structures for devices of infrared optoelectronics

It is reported that a Ga_0.92In_0.08P_0.05As_0.08Sb_0.87 quinary solid solution, which is lattice-matched to InAs, with a band gap of 695 meV (77 K) and 640 meV (300 K) is obtained. It is demonstrated that a heterojunction of type II is realized in the InAs/Ga_0.92In_0.08P_0.05As_0.08Sb_0.87 structure. The solid solution obtained was used for the development of prototypes of light-emitting diodes and photodiodes with the highest intensity of emission and photosensitivity in the vicinity of 1.9 µm.     

Resonance vibrations of rotors with shrouding rings. 2. Results of the computing experiment

The article presents the results of a computing experiment carried out with the use of a previously described calculation model of a rotor for determining the effect of the characteristics of an element of the elastodissipative connection of the blades on their resonance vibrations in the case of flanged shrouding rings with a view to the asymmetry of the rotor due to the mistuning of the blade frequencies and a possible difference of the conditions of their connection on the shrouding flanges. The obtained results indicate that it is possible to reduce the vibrostresses as well as the scatter of the resonance vibration amplitudes of turbine rotors by choosing the parameters of the shrouding connecting the blades.Prepared from materials of a paper read at the All-Union Scientific Conference on Problems of the Strength of Engines (Moscow, April 26–28, 1988).Translated from Problemy Prochnosti, No. 10, pp. 96–100, October, 1990.     

Core and fuel cycle for an advanced sodium-cooled fast reactor

The development of BN-1200 is based on the greatest possible use of tested and scientifically validated and developed technical solutions implemented in BN-350, -600, and the BN-800 design as well as new technical solutions that increase facility cost-effectiveness and safety. The BN-1200 design must permit the reactor to operate with different cores, including with denser fuel. The main fuel variant considered is oxide fuel and for the nearest term nitride fuel, for which the production technology involves the same steps as the oxide technology. The main approaches for choosing the parameters of the BN-1200 core as well as the results of computational studies are presented.     

Limit Cycles in a Class of Hybrid Dynamical Systems

This paper deals with qualitative analysis of the so-called switched fluid networks. Such networks are used to model communication, computer, and flexible manufacturing systems. We prove that for any deterministic network from a specific class, there exists a finite number of limit cycles attracting all the trajectories of the system. Furthermore, we determine this number. Date received: March 11, 2000. Date revised: January 19, 2001.     

Water Sorption by Carbon Fibers

Protection of Metals and Physical Chemistry of Surfaces - The degree of crystallinity of carbon fibers (CFs) of different manufacturers has been determined by means of the Raman scattering method....     

Tagging of η mesons using the pd → 3Heη reaction near threshold

A zero-degree spectrometer for tagging η mesons on the CELSIUS/WASA facility is described, and its characteristics are presented. Tagging of η mesons is performed by detecting ³He ions produced by reaction pd → ³Heη close to the production threshold. The low background level (<2%) is in good agreement with the data obtained earlier on the SATURNE accelerator.