Showing papers by "Kazan Federal University published in 1987"

Built-in Self-testing of Logic Circuits Using Imperfect Duplication

Abstract: The method of built-in self-testing is proposed using imperfect duplication. As an example reducing the value of the average probability of missing a fault in the case of BIST of single-output combinational circuit has been shown.

Some models of the Geminids meteor stream formation

Abstract: Further development of methods of investigations of meteor shower structure and a great deal of observational data have made it possible to obtain a precise flux density profile along the Earth's orbit for the Geminids meteor shower This curve proved to be adequately described by a exponential law Examined are: (1) which ejection model will fit the observed shower structure; and (2) to what extent the subsequent process of evolution modifies the formed structure The following conclusions are drawn: (1) When studying the mechanism of formation of meteor streams, it is necessary to take into consideration the velocity distribution of particles that have been ejected from the parent body; (2) On the basis of the observed density variations, it is possible to determine what kind of ejection takes place (a single ejection or that around an orbital arch); and (3) The original structure of the Geminids cross section persists for no more than 1,500 to 2,000 years

Models of sporadic meteor body distributions

Abstract: The distribution of orbital elements and flux density over the celestial sphere are the most common forms of representation of the meteor body distribution in the vicinity of the Earth's orbit The determination of flux density distribution of sporadic meteor bodies was worked out The method and its results are discussed