22 research outputs found
Confining Properties of the Homogeneous Self-Dual Field and the Effective Potential in SU(2) Yang-Mills Theory
We examine in non-Abelian gauge theory the heavy quark limit in the presence
of the (anti-)self-dual homogeneous background field and see that a confining
potential emerges, consistent with the Wilson criterion, although the potential
is quadratic and not linear in the quark separation. This builds upon the
well-known feature that propagators in such a background field are entire
functions. The way in which deconfinement can occur at finite temperature is
then studied in the static temporal gauge by calculation of the effective
potential at high temperature. Finally we discuss the problems to be surmounted
in setting up the calculation of the effective potential nonperturbatively on
the lattice.Comment: 31 pages, LaTeX, expanded discussion and derivations in Sections 2
and
DIRECTION OF PROPERTIES INCREASING OF CANTOR HEA
Π Π½Π°ΡΡΠΎΡΡΠ΅ΠΉ ΡΡΠ°ΡΡΠ΅ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ ΠΎΠ±Π·ΠΎΡ ΠΏΡΠ±Π»ΠΈΠΊΠ°ΡΠΈΠΉ ΠΎΡΠ΅ΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΡ
ΠΈ Π·Π°ΡΡΠ±Π΅ΠΆΠ½ΡΡ
Π°Π²ΡΠΎΡΠΎΠ² ΠΏΠΎ Π΄Π²ΡΠΌ Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡΠΌ ΡΠ»ΡΡΡΠ΅Π½ΠΈΡ ΡΠ²ΠΎΠΉΡΡΠ² ΡΠΏΠ»Π°Π²Π°: CoCrFeNiMn Π»Π΅Π³ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ, Π²ΡΠ΄Π΅Π»Π΅Π½ΠΈΡΠΌΠΈ ΠΈ ΡΠ΅ΡΠΌΠΎΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΎΠΉ, ΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠ°Π·ΠΎΠ²ΡΡ
Π΄ΠΈΠ°Π³ΡΠ°ΠΌΠΌ Calphad. ΠΠΎ ΠΏΠ΅ΡΠ²ΠΎΠΌΡ Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π° ΡΠΎΠ»Ρ Π»Π΅Π³ΠΈΡΠΎΠ²Π°Π½ΠΈΡ B, Vi, Al, V, Si, Nb; Π½Π°Π½ΠΎΠ²ΡΠ΄Π΅Π»Π΅Π½ΠΈΡΠΌΠΈ, ΡΠ°Π·Π»ΠΈΡΠ½ΡΠΌΠΈ ΡΠ΅ΠΆΠΈΠΌΠ°ΠΌΠΈ ΡΠ΅ΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ. Π‘Π΄Π΅Π»Π°Π½ Π²ΡΠ²ΠΎΠ΄ ΠΎ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠΎΠ² ΠΏΠΎ Π»Π΅Π³ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΠΠ‘ Zr ΠΈ Nb, Ρ
ΠΎΡΠΎΡΠΎ Π·Π°ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄ΠΎΠ²Π°Π²ΡΠΈΡ
ΡΠ΅Π±Ρ Π² ΡΠΏΡΠΎΡΠ½Π΅Π½ΠΈΠΈ ΡΡΠ°Π»Π΅ΠΉ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΡΠΎΠ·Π΄Π°Π½ΠΈΠ΅ ΠΈ ΠΌΠΎΠ΄ΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠ²ΠΎΠΉΡΡΠ² ΠΏΡΡΠΈΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠ½ΡΡ
ΠΠΠ‘ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎ ΠΏΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠΈ ΠΊΠΎΠΌΠΏΡΡΡΠ΅ΡΠ½ΡΡ
ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌ Calphad, ΡΠ°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π½ΡΡ
Π΄Π»Ρ ΡΠ°ΡΡΠ΅ΡΠ° Π΄ΠΈΠ°Π³ΡΠ°ΠΌΠΌ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ.This article reviews the publications of domestic and foreign authors in two areas of improving the properties of alloy: CoCrFeNiMn alloying, precipitation and heat treatment and the use of Calphad phase diagrams. In the first direction, the role of doping with B, Vi, Al, V, Si, Nb is analyzed; nanoprecipitations, various modes of thermal and deformation processing. It is concluded that it is necessary to conduct experiments on the alloying of HEA with Zr and Nb, which have proven themselves well in hardening steels. The creation and modification of the properties of fivecomponent wind farms is possible using the Calphad computer programs developed for calculating state diagrams.Π Π°Π±ΠΎΡΠ° Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π° ΠΏΡΠΈ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ΅ Π³ΡΠ°Π½ΡΠ° Π ΠΠ€ 23-49-00015
Catalytic Etherification of ortho-Phosphoric Acid for the Synthesis of Polyurethane Ionomer Films
The etherification reaction of ortho-phosphoric acid (OPA) with polyoxypropylene glycol in the presence of tertiary amines was studied. The reaction conditions promoting the catalytic activity of triethanolamine (TEOA) and triethylamine (TEA) in the low-temperature etherification of OPA were established. The catalytic activity of TEOA and TEA in the etherification reaction of phosphoric acid is explained by the hydrophobic-hydrophilic interactions of TEA with PPG, leading, as a result of collective interactions, to a specific orientation of polyoxypropylene chains around the tertiary amine. When using triethylamine, complete etherification of OPA occurs, accompanied by the formation of branched OPA ethers terminated by hydroxyl groups and even the formation of polyphosphate structures. When triethanolamine is used as a catalyst, incomplete etherification of OPA with polyoxypropylene glycol occurs and as a result, part of the phosphate anions remain unreacted in the composition of the resulting aminoethers of ortho-phosphoric acid (AEPA). In this case, the hydroxyl groups of triethanolamine are completely involved in the OPA etherification reaction, but the catalytic activity of the tertiary amine weakens due to a decrease in its availability in the branched structure of AEPA. The kinetics of the etherification reaction of OPA by polyoxypropylene glycol catalyzed by TEOA and TEA were studied. It was shown that triethanolamine occupies a central position in the AEPA structure. The physico-mechanical and thermomechanical properties of polyurethane ionomer films obtained on the basis of AEPA synthesized in a wide temperature range were studied
ΠΠ΅ΡΠΎΠ΄Ρ ΠΎΡΠ΅Π½ΠΊΠΈ Ρ Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΌΠ½ΠΎΠ³ΠΎΠΏΡΠΎΡΠ΅ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ Π²ΡΡΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ° Π±Π»ΠΎΠΊΠ° Π°Π΄Π°ΠΏΡΠ°ΡΠΈΠΈ
The article presents the results of the development of mathematical models of the main methods for
assessing efficiency indicators of multiprocessor computer systems adaptation unit multibeam antenna in
real time and task of selecting the optimal structureΠ ΡΡΠ°ΡΡΠ΅ ΠΏΡΠΈΠ²ΠΎΠ΄ΡΡΡΡ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΠΎΡΠ΅Π½ΠΊΠΈ ΠΎΡΠ½ΠΎΠ²-
Π½ΡΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΌΠ½ΠΎΠ³ΠΎΠΏΡΠΎΡΠ΅ΡΡΠΎΡΠ½ΡΡ
Π²ΡΡΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ² Π±Π»ΠΎΠΊΠ° Π°Π΄Π°ΠΏΡΠ°ΡΠΈΠΈ ΠΌΠ½ΠΎΠ³ΠΎΠ»ΡΡΠ΅Π²ΠΎΠΉ Π°Π½ΡΠ΅Π½Π½Ρ Π² ΡΠ΅Π°Π»ΡΠ½ΠΎΠΌ Π²ΡΠ΅ΠΌΠ΅Π½ΠΈ ΠΈ ΠΏΠΎΡΡΠ°Π½ΠΎΠ²ΠΊΠ° Π·Π°Π΄Π°ΡΠΈ Π²ΡΠ±ΠΎΡΠ° ΠΈΡ
ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠΉ
ΡΡΡΡΠΊΡΡΡ
ΠΠ΅ΡΠΎΠ΄Ρ ΠΎΡΠ΅Π½ΠΊΠΈ Ρ Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΌΠ½ΠΎΠ³ΠΎΠΏΡΠΎΡΠ΅ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ Π²ΡΡΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ° Π±Π»ΠΎΠΊΠ° Π°Π΄Π°ΠΏΡΠ°ΡΠΈΠΈ
The article presents the results of the development of mathematical models of the main methods for
assessing efficiency indicators of multiprocessor computer systems adaptation unit multibeam antenna in
real time and task of selecting the optimal structureΠ ΡΡΠ°ΡΡΠ΅ ΠΏΡΠΈΠ²ΠΎΠ΄ΡΡΡΡ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΠΎΡΠ΅Π½ΠΊΠΈ ΠΎΡΠ½ΠΎΠ²-
Π½ΡΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΌΠ½ΠΎΠ³ΠΎΠΏΡΠΎΡΠ΅ΡΡΠΎΡΠ½ΡΡ
Π²ΡΡΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ² Π±Π»ΠΎΠΊΠ° Π°Π΄Π°ΠΏΡΠ°ΡΠΈΠΈ ΠΌΠ½ΠΎΠ³ΠΎΠ»ΡΡΠ΅Π²ΠΎΠΉ Π°Π½ΡΠ΅Π½Π½Ρ Π² ΡΠ΅Π°Π»ΡΠ½ΠΎΠΌ Π²ΡΠ΅ΠΌΠ΅Π½ΠΈ ΠΈ ΠΏΠΎΡΡΠ°Π½ΠΎΠ²ΠΊΠ° Π·Π°Π΄Π°ΡΠΈ Π²ΡΠ±ΠΎΡΠ° ΠΈΡ
ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠΉ
ΡΡΡΡΠΊΡΡΡ
Diversity and Metabolism of Microbial Communities in a Hypersaline Lake along a Geochemical Gradient
In the south of western Siberia (Russia), there are many unique and unexplored soda, saline, and freshwater lakes. In this study, the results are presented on microbial diversity, its metabolic potential, and their relation with a set of geochemical parameters for a hypersaline lake ecosystem in the Novosibirsk region (Oblast). The metagenomic approach used in this work allowed us to determine the composition and structure of a floating microbial community, the upper layer of silt, and the strata of bottom sediments in a natural saline lake via two bioinformatic approaches, whose results are in good agreement with each other. In the floating microbial community and in the upper layers of the bottom sediment, bacteria of the Proteobacteria (Gammaproteobacteria), Cyanobacteria, and Bacteroidetes phyla were found to predominate. The lower layers were dominated by Proteobacteria (mainly Deltaproteobacteria), Gemmatimonadetes, Firmicutes, and Archaea. Metabolic pathways were reconstructed to investigate the metabolic potential of the microbial communities and other hypothetical roles of the microbial communities in the biogeochemical cycle. Relations between different taxa of microorganisms were identified, as was their potential role in biogeochemical transformations of C, N, and S in a comparative structural analysis that included various ecological niches
Effect of Ligand Substitution on Zero-Field Slow Magnetic Relaxation in Mononuclear Dy(III) Ξ²-Diketonate Complexes with Phenanthroline-Based Ligands
Herein, we report the synthesis, structure and magnetic properties of two mononuclear complexes of general formula [Dy(acac)3(L)], where L = 2,2-dimethyl-1,3-dioxolo[4,5-f][1,10] phenanthroline (1) or 1,10-phenanthroline-5,6-dione (2), and acacβ = acetylacetonate anion. A distorted square-antiprismatic N2O6 environment around the central Dy(III) ion is formed by three acetylacetonate anions and a phenanthroline-type ligand. Both complexes display a single-molecule magnet (SMM) behavior at zero applied magnetic field. Modification of the peripheral part of ligands L provide substantial effects both on the magnetic relaxation barrier Ueff and on the quantum tunneling of magnetization (QTM). Ab initio quantum-chemical calculations are used to analyze the electronic structure and magnetic properties