Mathematical modeling of synthesis technologies of powder materials for the space robotics
The production process is analyzed and a brief description of the main theoretical models of spark plasma sintering (SPS) is given. The experience of the use of numerical modeling by the finite element method (FEM) using specialized software for the study of SPS is examined. Goals and objectives of numerical simulation of the process are formulated. The main shortcomings and limitations of known methods of modeling are outlined.
1. Suárez M., Fernández A., Menéndez J. L. et al. Challenges...
Photoluminescence of the 15NV–-center created by implantation
We study the properties of the spin states in single diamond 15NV–-center at the ground state level anti-crossing. Our approach uses a complete set of commuting operators. We have shown that under certain conditions in 15NV–-center it is possible to obtain a 100 % transfer of polarization from the electron spin to the spin of the 15N nucleus. We believe that these conditions can be satisfied for 15NV–-centers obtained by implantation.
1. Jelezko F., Gaebel T., Popa I. et al. Observation...
The problem of hereditary sin in F.M. Dostoevsky’s novel The Brothers Karamazov
The analysis of the problem of “hereditary sin” in Dostoevsky’s novel The Brothers Karamazov is considered in the light of the discussion on the theory of “hereditary sin” within modern Orthodoxy. The author examines the “threshold situations” faced by the novel’s characters and ...
Enhancing the effectiveness of singlet-triplet energy transfer in a donor-acceptor pair of phosphor molecules under the influence of an external spin-orbit perturbation
This article studies the effect of an extern heavy atom (KI salt) on the effi-ciency of nonradiative spin-forbidden singlet-triplet (S-T) transfer of elec-tronic energy between the rhodamine 6G (donor) and acriflavine (acceptor) dye molecules in polyvinyl alcohol films. The delayed fluorescence intensity enhancement and an increase in the lifetime of the acceptor triplet states in the presence of KI have been established. The constant rates of deactivation of the singlet and triplet states of dye...
Watershed or Cul-de-Sac? Disputes in the Theological Reception of Kant’s Philosophy
Kant’s turn to the subject has changed the epistemological conditions for theology. Four intellectual backgrounds of objections are examined: an Aristotelian and Thomistic teleological order of nature (1); Augustinianism based on original sin in which human agency is completely attributed to God’s grace (2); a Hegelian critique of the deontological conception of an “unconditional ought” which also puts Kant’s postulate of the existence of God into question (3); the combination ...
A new way of solving the problem of the sinusoidal waves on the surface of a homogeneous perfect fluid
We consider a new way of solving the problem of the sinusoidal wave on the surface of a homogeneous perfect fluid. Its feature is used instead of the potential speed of the original characteristics of wave motion: horizontal and vertical components of the velocity and pressure. It is noted that it will generalize the problem under consideration in the event of a multi-layer liquid. The results, including the dispersion relation, fully consistent with the known. Specially considered long-wave approximation...
An analysis of sinusoidal waves in two-layer liquid
A detailed analysis of sinusoidal waves in two-layer liquid is made. The dispersion relations for short and long waves are studied. The success was helped significantly by a technique created by us.
1. Сретенский Л. Н. Теория волновых движений идеальной жидкости. М., 1977.
2. Каменкович В. М. О нормальных колебаниях многослойной вращающей жидкости // Физика атмосферы...
Regularity and serendipity: a systemic asymmetry of singer songwriting
The author analyses the works of singer songwriters, i. e. lyrics of bard songs and rock poetry, from the point of view of their plot and their place in the typology of texts. The author identifies a discrepancy between the principles of building the plot of songs and the methods of creating the poetic model of the world in the central and peripheral areas of this type of songs. This internal asymmetry of the analysed context is associated with the borderline position of the songs in literature....
Building an image depth map for portable devices
A description and comparison of algorithms for constructing stereo images using one or two video cameras for use in a portable device in real time is given. Based on performance measurements for the most common processors for single-board computers, the most appropriate approach was selected.
Voiteshonok Yu. V.
stereo image, Semi-Global Block Matching, Block Matching, single board computer, algorithms, block matching
Propagation of sine waves in a two-layer density-stratified fluid
The paper presents the correction of a new technique for solving the problem of sinusoidal waves on the surface of a homogeneous ideal fluid, associated with the refinement of the boundary conditions. The dispersion relation for long waves is found. The frequency value for sinusoidal waves in a stratified fluid is obtained.
Zaitsev A. A., Rudenko A. I., Alekseeva S. M.
two-layer liquid, sine wave, dispersion relation, phase velocity, Boussinesq approximation
The influence of implantation on the bright-ness of nitrogen-vacancy centers
We investigate the properties of spin states in the electronic ground state of a single nitrogen-vacancy center (NV–) in 13C-enriched diamond. The analysis is based on application of a method that uses a complete set of commuting operators (CSCO). Each state is characterized by a single set of values of CSCO. The properties of the spin states change at the level anti-crossing (LAC). This change leads to an increase in the spin-lattice relaxation rate and to a change in the ODMR spectrum. The...