Quasiparticle dynamics in ferromagnetic compounds of the Co-Fe and Ni-Fe systems

We report a theoretical study of the quasiparticle lifetime and the quasiparticle mean free path caused by inelastic electron-electron scattering in ferromagnetic compounds of the Co-Fe and Ni-Fe systems. The study is based on spin-polarized calculations, which are performed within the $GW$ approximation for equiatomic and Co- and Ni-rich compounds, as well as for their constituents. We mainly focus on the spin asymmetry of the quasiparticle properties, which leads to the spin-filtering effect experimentally observed in spin-dependent transport of hot electrons and holes in the systems under study. By comparing with available experimental data on the attenuation length, we estimate the contribution of the inelastic mean free path to the latter.Comment: 10 pages, 10 figure

Ontological synthesis of management decisions in conditions of antagonistic conflicts

Abstract: The ontological synthesis and the formal apparatus of formation of management decisions on the basis of simulation of antagonistic conflicts by software of the electronic polygon are discussed. The article presents the structure of the conceptual base of neoconflictology for describe the means of modeling conflicts under uncertainty. The main attention is paid to the use of complex ontology in the formalization of the use of intelligent technologies in the problems of modeling the development of various forms of conflict situations.Note: Research direction:Mathematical modelling in actual problems of science and technic

Conceptual base of a supercomputer platform of application-oriented simulation, prediction and expertizes of conflict interaction

Abstract: The problem of creation of the supercomputer platform of application-oriented simulation (SPAS) of processes of conflict interaction of difficult systems in the conditions of high uncertainty is discussed for the benefit of safety of crucial objects. Integrated SPAS is active dynamic system that provides operational control of conflict situations in the system through the integration of the means of processing large volumes of operational information and technology urgently calculations. Functional components of SPAS implements a strategy simulation and dynamic visualization for the development of management decisions in the framework of a competition principle.Note: Research direction:Mathematical modelling in actual problems of science and technic

The European mistletoe ( Viscum album

The hemiparasitic European mistletoe, Viscum album L. (Viscaceae), displays a rapid and remarkable expansion into natural and urban ecosystems in Ukraine. The monitoring and management of this quickly spreading species is becoming increasingly difficult as new plant species become hosts. Unlike other local mistletoe species, the European mistletoe has a broad distribution and thus requires a countrywide pest status assessment for control. This review outlines the major taxonomic and evolutionary issues pertinent to V. album with an emphasis on the characters used to distinguish its five currently recognized subspecies. The review also provides an updated distribution map and host range for the three V. album subspecies in Ukraine [V. album subsp. album, V. album subsp. abietis (Wiesb.) Janch., and V. album subsp. austriacum (Wiesb.) Vollm.], addressing the current knowledge of their biology and ecology. A significant portion of the paper is devoted to the diversity of organisms associated with V. album, including herbivores, endophytes, and parasites, drawing particular attention to major pollination and dispersal vectors, as well as potential biocontrol agents for this mistletoe species.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author