In memory of Arkady Viktorovich Kryazhimskiy (1949-2014)

The article is devoted to the description of Academician Arkady Kryazhimskiy's life path. The facts of the scientific biography of Acad. Kryazhimskiy are presented with the emphasis on his outstanding contribution into the theory of dynamic inversion, the theory of differential games, and control theory. His personal talents in different spheres are also marked out

Research and modeling of laser ablation by ultra-short laser pulses for metal targets

In this article an improved mathematical model for a laser metal ablation by ultra-short duration laser pulses is proposed. The model is based on two-temperature hydrodynamic model for electrons and ions and wide-range equation of state for metals. The results of the computer simulation for aluminum and copper are compared with experimental data at a different laser fluence and duration of pulses for ablation depth. A good agreement with them and the experimental data of ablation depth is received

THE MACHINE FOR AUTOMATED PRODUCTION OF BLANKS MATERIAL MR

The article describes the design of the machine for automated production of blanks from material MR (metallic rubber). In the future, creation of this machine will allow researching the effect of blanks structure upon the properties offinished products from the material MR

Registration of high-intensity electron and x-ray fields with polycrystalline CVD diamond detectors

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Phase diagram of the Holstein polaron in one dimension

The behavior of the 1D Holstein polaron is described, with emphasis on lattice coarsening effects, by distinguishing between adiabatic and nonadiabatic contributions to the local correlations and dispersion properties. The original and unifying systematization of the crossovers between the different polaron behaviors, usually considered in the literature, is obtained in terms of quantum to classical, weak coupling to strong coupling, adiabatic to nonadiabatic, itinerant to self-trapped polarons and large to small polarons. It is argued that the relationship between various aspects of polaron states can be specified by five regimes: the weak-coupling regime, the regime of large adiabatic polarons, the regime of small adiabatic polarons, the regime of small nonadiabatic (Lang-Firsov) polarons, and the transitory regime of small pinned polarons for which the adiabatic and nonadiabatic contributions are inextricably mixed in the polaron dispersion properties. The crossovers between these five regimes are positioned in the parameter space of the Holstein Hamiltonian.Comment: 19 pages, 9 figure

Study of doubly strange systems using stored antiprotons

Bound nuclear systems with two units of strangeness are still poorly known despite their importance for many strong interaction phenomena. Stored antiprotons beams in the GeV range represent an unparalleled factory for various hyperon-antihyperon pairs. Their outstanding large production probability in antiproton collisions will open the floodgates for a series of new studies of systems which contain two or even more units of strangeness at the P‾ANDA experiment at FAIR. For the first time, high resolution γ-spectroscopy of doubly strange ΛΛ-hypernuclei will be performed, thus complementing measurements of ground state decays of ΛΛ-hypernuclei at J-PARC or possible decays of particle unstable hypernuclei in heavy ion reactions. High resolution spectroscopy of multistrange Ξ−-atoms will be feasible and even the production of Ω−-atoms will be within reach. The latter might open the door to the |S|=3 world in strangeness nuclear physics, by the study of the hadronic Ω−-nucleus interaction. For the first time it will be possible to study the behavior of Ξ‾+ in nuclear systems under well controlled conditions

Supplemental Material: Radioisotopic and biostratigraphic constraints on the classical Middle–Upper Permian succession and tetrapod fauna of the Moscow syneclise, Russia

Figures S1–S4 (photos, stratigraphic logs, stratigraphy, and results of single grain chemical abrasion ID-TIMS analysis) and Tables S1 and S2 (fossils, and U-Pb isotopic data).&lt;br&gt;</jats:p

Tunguska сoals, Siberian sills and the Permian-Triassic extinction

The latest Permian-Triassic volcanism that created the Siberian traps, including the products of the explosion and interaction of the magmas with regional volcanic and sedimentary rocks, is now considered to be the main driving forces of the end-Permian mass extinction - the greatest global extinction in the Earth history. As proposed, the trap magmatism induced metamorphism of the sedimentary succession that released the sediment-derived CO2 from the thermogenic cracking of coal by intrusive heating. Although the coal-intrusion interaction plays a central role in this model, the coal geology in Tunguska Basin, i.e. spatial and temporal distribution of coals, coal metamorphism and specifics of the metamorphism at the contact of coals and intrusions, has never been assessed from this prospective. The overall goal of this study is to clarify the role and contribution CO2 of the Tunguska coals to the model. The study suggests that the thickness and distribution of the sills within the coal-bearing successions at most minimally influence the overall metamorphic grade of the coals in Tunguska Basin. The age of the explosion pipes that delivered CO2 into the atmosphere most probably is early Triassic to Jurassic-early Cretaceous. The low degree of metamorphism driven by the magmatism, questions estimates of the amount of sediment-derived CO2 generated that could have influenced or driven the PTB extinction. Furthermore, as a mechanism to deliver such gases to the atmosphere, the explosion pipes post-date the extinction