We study here, within the density-functional theory, the magnetic anisotropy energy ~MAE! in Ni2MnGa which is a prototype of a magnetic shape-memory alloy. We calculate the MAE, which is a key property for the magnetic shape-memory effect, for tetragonal structure with different ratios of the c and a lattice constants, reproducing the experimental easy axes both in compression and elongation of...

the question of whether architectural creativity is more of an artistic or engineering nature is one with a long history but also one with no conclusive answer. the art camp would argue that technology should be treated as a means towards and end, and that technology alone cannot give meaning to our lives. the engineering camp on the other hand would argue that good problem-solving results in b...

Incomparably more often, the nucleus of an atom decays earlier, and proton continues to exist, but in extremely rare cases, reverse sequence is possible: self-decay precedes moment decay nucleus. We believe that mass primary nuclide 128Te with longest experimentally confirmed half-life should serve as testable for detecting self-decay. The a will differ from ordinary radioactivity by much energ...

Tests of a conical-spherical body in supersonic wind tunnel were carried out on free oscillation installation along the pitch angle at Mach number M = 1.75 and two moments inertia relative to axis rotation. For with large moment inertia, self-oscillations amplitude ca. 10 deg obtained. first time, phenomenon degeneration for smaller has been discovered. An attempt was made model using an ordina...

Let y ≡ y(2d) = {yi}i∈Zn+ ,|i|62d denote a real n-dimensional multisequence of degree 2d, y0 > 0. Let Ly : R2d[x1, . . . , xn] 7→ R denote the Riesz functional, defined by Ly(∑|i|62d aix i) = ∑ aiyi, and let Md(y) denote the corresponding moment matrix. Positivity of Ly plays a significant role in the Truncated Moment Problem and in the Polynomial Optimization Problem, but concrete conditions f...

Abstract This paper considers logarithmic asymptotics of tails randomly stopped sums. The stopping is assumed to be independent the underlying random walk. First, finiteness ordinary moments revisited. Then study expanded more general asymptotic analysis. Results are applicable a large class heavy-tailed variables. main result enables one identify if behaviour sum dominated by its increments or...