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The results of studying the quantitative, material, and morphometric composition of rock debris in sediments sampled by a box-corer on Lomonosov Ridge (83° N), Arctic Ocean, during the Severnyi Polyus 41 expedition of the Arctic and Antarctic Research Institute are presented. Clasts ≥ 1 cm in size were sampled from each distinguished layer according to the lithological description. The age model was created by the lithostratigraphic correlation with previously dated cores. The content of clasts on the eastern slope and summit is significantly higher than on the western slope, which is explained by the higher sedimentation rate on the western slope after the deglaciation peak. The change in the rock composition from carbonate to igneous and the increase in roundness with time indicate a higher input of Eurasian material in MIS 1.

The effect of the nickel content in commercial copper-nickel alloys (manganine, cupronickel, constantan, monel) on the mechanical properties and parameters of macroscopic plastic strain localization under uniaxial tension is studied. The evolution of plastic strain localization in the yield plateau and parabolic work hardening stages is studied by digital speckle photography. The effect of the Ni content on the onset and duration of the parabolic strain hardening stage is shown. The dependence of the spatial period of plastic strain localization of the alloys on the Ni content in the studied alloys is established.

The dynamics of circumbinary planetary systems (the systems in which the planets orbit a central binary) with a small binary mass ratio discovered to date is considered. The domains of chaotic motion have been revealed in the “pericentric distance–eccentricity” plane of initial conditions for the planetary orbits through numerical experiments. Based on an analytical criterion for the chaoticity of planetary orbits in binary star systems, we have constructed theoretical curves that describe the global boundary of the chaotic zone around the central binary for each of the systems. In addition, based on Mardling’s theory describing the separate resonance “teeth” (corresponding to integer resonances between the orbital periods of a planet and the binary), we have constructed the local boundaries of chaos. Both theoretical models are shown to describe adequately the boundaries of chaos on the numerically constructed stability diagrams, suggesting that these theories are efficient in providing analytical criteria for the chaoticity of planetary orbits.

Possible configurations of the planetary systems of the binary stars α Cen A–BandEZAqr A–C are analyzed. The P-type orbits—circumbinary ones, i.e., the orbits around both stars of the binary, are studied. The choice of these systems is dictated by the fact that α Cen is closest to us in the Galaxy, while EZ Aqr is the closest system whose circumbinary planets, as it turns out, may reside in the “habitability zone.” The analysis has been performed within the framework of the planar restricted three-body problem. The stability diagrams of circumbinary motion have been constructed: on representative sets of initial data (in the pericentric distance–eccentricity plane), we have computed the Lyapunov spectra of planetary motion and identified the domains of regular and chaotic motion through their statistical analysis. Based on present views of the dynamics and architecture of circumbinary planetary systems, we have determined the most probable planetary orbits to be at the centers of the main resonance cells, at the boundary of the dynamical chaos domain around the parent binary star, which allows the semimajor axes of the orbits to be predicted. In the case of EZ Aqr, the orbit of the circumbinary planet is near the habitability zone and, given that the boundary of this zone is uncertain, may belong to it.

Magnetic properties of (Y 1 - x Nd x ) 2 BaNiO 5 with x = 1 ; 0.25; 0.15; and 0.04 are investigated by means of specific heat, magnetic susceptibility, and spectroscopic measurements. We estimate a magnetic contribution of the neodymium subsystem into a total specific heat and magnetic susceptibility using spectroscopic data. We show that the nickel subsystem is intrinsically disordered in the whole temperature range studied, whereas the magnetization of the nickel chain segments contributes to the total magnetic susceptibility and specific heat at low temperatures.

The conditions of formation of metastable Zr or Ti aluminides with Y under crystallization of superheated melts of the Al – Zr – Y and Al – Ti – Y systems with hypoeutectic and hypereutectic compositions with respect to yttrium are studied. Complex Al3(Zr0.67Y0.33) and Aln(Ti0.67Y0.33) aluminides with cubic lattices are shown to form due to crystallization of the Al – Zr – Y and Al – Ti – Y melts hypereutectic with respect to yttrium after superheating by 300°C above the liquidus temperatures.

A new class of cosmological tests is proposed which examines the dependence on redshift z of the dispersion in peculiar velocities, virial mass, and mass-luminosity ratios of galactic clusters. Data on galactic clusters with redshifts up to z ≈ 2 are accessible to modern instruments in the visible and x-ray ranges. Clusters of galaxies are less susceptible to evolutionary effects than other objects at large z , so that the proposed tests offer promise for analysis of cosmological models.