Structural Study of Defects in Granulated EP741NP Nickel Alloy

Crystallography Reports - Fracture regions in a nickel alloy have been investigated by electron microscopy. HfO2 particles are mainly found in the fatigue crack zone. Their morphology and crystal...     

Generalized Derivations of a Quantum Plane

In the paper we determine generalized derivations of a general quantum plane. __________ Translated from Sovremennaya Matematika i Ee Prilozheniya (Contemporary Mathematics and Its Applications), Vol. 13, Algebra, 2004.     

Construction of generator polynomials for residue codes of degrees 5–8

A generalization of quadratic residue codes to the case of higher degree is considered. Properties of h-power residue codes are studied. In some cases, it is possible to indicate the form and method of construction of a generator polynomial. Using the results obtained here, generator polynomials for residue codes of degrees 5–8 are constructed.     

On projective modules over quantum polynomials

The present paper can be considered as a continuation of [6] and includes an extension of the main result of [1]. This research is partially supported by the Russian Foundation for Basic Research and by INTAS, grant No. 93-2618. Translated from Itogi Nauki i Tekhniki, Seriya Sovremennaya Matematika i Ee Prilozheniya. Tematicheskie Obzory. Vol. 40, Algebra-6, 1996.     

Technique for Determining the Fracture Relief Periodicity in Fractured Materials

Crystallography Reports - A technique for determining the relief periodicity, in particular, the pitch of fatigue striations formed during fatigue fracture of metals, is proposed. The determination...     

Functional approach to a Gelfand–Tsetlin-type basis for $$mathfrak{o}_5$$

Theoretical and Mathematical Physics - We consider a realization of representations of the Lie algebra $$mathfrak{o}_5$$ in the space of functions on the group $$Spin_5simeq Sp_4$$ . In the...     

Quasicrystals and their symmetries

This paper is a survey of results on symmetries of crystals and of some results on a mathematical approach to the theory of quasicrystals and their symmetries. __________ Translated from Fundamentalnaya i Prikladnaya Matematika, Vol. 10, No. 3, pp. 3–10, 2004.     

Radiation-modified polytetrafluoroethylene: Structure and properties

The scope offered by radiation technology for polytetrafluoroethylene modification was discussed. New modified materials possess enhanced antifriction and compressive parameters and are suitable for different commercial applications.     

Emission of electrons from silver azide at the preexplosion stage

A new phenomenon of preexplosion electron emission from energetic materials was experimentally was revealed, a process that accompanies initial stages of explosive decomposition in the solid phase, before the onset of intense energy release and sample dispersion.