FEATURES OF MILITARY EDUCATIONAL INSTITUTIONS ACTIVITY IN YELISAVETGRAD REGION IN 1865-1917

In the article, the features of military educational institutions activity in Yelisavetgrad region in 1865–1917 have been studied. The purpose of the article is to study features of Yelisavetgrad cavalry junker school activity in Yelisavetgrad region in 1865–1917. The purpose of the Yelisavetgrad cavalry junker school was analysed as the one to prepare high-moral officers-practitions and as a military one that had the right to train officers in the rank of Cornets. It has been concluded that at a certain point of its activity Yelisavetgrad cavalry junker school became the second in the Russian Empire due to its the internal organization of the institution's life in accordance with the current charter of the internal service in the troops, the organization of the educational process and the regime in the school.Key words: military educational institutions, Yelisavetgrad region, military school, officer cavalry school, military education

Study of the spring and autumn daemon-flux maxima at the Baksan Neutrino Observatory

Detection of daemons in low-background conditions in September 2005 and March 2006 has provided evidence for the expected to occur at that times maxima in the flux of daemons with V ~ 10-15 km s-1, which hit the Earth from near-Earth, almost circular heliocentric orbits. The ability of some FEU-167-1 PM tubes with a thicker inner Al coating to detect directly daemon passage through them has also been demonstrated, an effect increasing ~100-fold the detector efficiency. As a result, the daemon flux recorded at the maxima was increased from ~10-9 to ~10-7 cm-2 s-1. The intensity and direction of the flux during maxima depend on the time of day and latitude of observations (therefore, synchronous measurements in the Northern and Southern Earth's hemispheres are desirable). All the experimental results obtained either support the conclusions following from the daemon paradigm or find a simple interpretation within it.Comment: 15 pages, including 8 figures and 3 table

Anchoring of Drifting Spiral and Scroll Waves to Impermeable Inclusions in Excitable Media

Anchoring of spiral and scroll waves in excitable media has attracted considerable interest in the context of cardiac arrhythmias. Here, by bombarding inclusions with drifting spiral and scroll waves, we explore the forces exerted by inclusions onto an approaching spiral and derive the equations of motion governing spiral dynamics in the vicinity of inclusion. We demonstrate that these forces nonmonotonically depend on distance and can lead to complex behavior: (a) anchoring to small but circumnavigating larger inclusions; (b) chirality-dependent anchoring

Individualization of atrial tachycardia models for clinical applications: Performance of fiber-independent model

One of the challenges in the development of patient-specific models of cardiac arrhythmias for clinical applications has been accounting for myocardial fiber organization. The fiber varies significantly from heart to heart, but cannot be directly measured in live tissue. The goal of this paper is to evaluate in-silico the accuracy of left atrium activation maps produced by a fiber-independent (isotropic) model with tuned diffusion coefficients, compares to a model incorporating myocardial fibers with the same geometry. For this study we utilize publicly available DT-MRI data from 7 ex-vivo hearts. The comparison is carried out in 51 cases of focal and rotor arrhythmias located in different regions of the atria. On average, the local activation time accuracy is 96% for focal and 93% for rotor arrhythmias. Given its reasonably good performance and the availability of readily accessible data for model tuning in cardiac ablation procedures, the fiber-independent model could be a promising tool for clinical applications

Frustrated Drift of an Anchored Scroll-Wave Filament and the Geodesic Principle

We investigate anchored scroll-wave filaments in an excitable medium whose diffusivity matrix, including its determinant, is spatially nonuniform. The study is motivated by cardiological applications where scroll-wave behavior in the presence of diffusivity gradients is believed to play an important role in the development of severe arrhythmias. A diffusivity gradient is expected to make the filament drift, unless drift is prevented ( frustrated ) by anchoring to localized defects in the propagation medium. The resulting stationary filament is a geodesic curve, as demonstrated here in the case of a nonzero but constant gradient. That is, the diffusivity matrix has a determinant that varies in space, in contrast to what was assumed in earlier work. Here, we show that the filament shape results from a metric tensor of the form (det D)D{-1} , where D is the diffusivity tensor. The filament\u27s shape is solely determined by the diffusivity tensor and is independent of the equation\u27s reaction terms. We derive the analytic solution for the filament and determine conditions for the existence of that solution. The theory is in excellent agreement with numerical simulations

ESTABLISHMENT AND ACTIVITY OF MILITARY EDUCATIONAL INSTITUTIONS IN YELISAVETGRAD REGION IN 1859-1886

In the article, the preconditions for the establishment and activity of educational military institutions in Yelisavetgrad region in 1859-1886 have been studied. The content and features of the educational process of military educational institutions in Yelisavetgrad region in 1859-1886 have been characterized. It has been concluded that the origin of military education in the Yelisavetgrad region began with the opening in 1859 of an officer cavalry school. An important element in the preparation of entrants to military schools was the military progymnasium, which operated in Yelisavetgrad from 1869 to 1886 and was the only of such establishments on the Ukrainian lands. Significant role in creating it was played by I. Offenberg, who also became an initiator of studies in the military corps.Key words: military educational institutions, Yelisavetgrad region, military school, officer cavalry school, military education.кандидат педагогічних наук, Перцов О. В. Створення та діяльність військових навчальних закладів на Єлисаветградщині у 1859–1886 рр. / Центральноукраїнський державний педагогічний університет імені Володимира Винниченка.У статті досліджено передумови створення та діяльності військових навчальних закладів на Єлисаветградщині у 1859–1886 рр. Охарактеризовано зміст та особливості навчального процесу військових навчальних закладів на Єлисаветградщині у 1859–1886 рр. Зроблено висновок, що зародження військової освіти на Єлисаветградщини почалося з відкриття у 1859 р. офіцерського кавалерійського училища. Важливим елементом підготовки вступників до військових училищ була військова прогімназія, яка діяла у Єлисаветграді з 1869 до 1886 рр. і була єдиним таким закладом на українських землях. Велику роль у створенні його відіграв І. Оффенберг, який також став ініціатором занять у військових корпусах.Ключові слова: військовий навчальних заклад, Єлисаветградщина, військове училище, офіцерське кавалерійське училище, військова освіта

Refraction of Scroll-Wave Filaments at the Boundary between Two Reaction-Diffusion Media

We explore the shape and the dynamics of scroll-wave filaments in excitable media with an abruptly changing diffusion tensor, important for cardiac applications. We show that, similar to a beam of light, the filament refracts at the boundary separating domains with different diffusion. We derive the laws of filament refraction and test their validity in computational experiments. We discovered that at small angles to the interface, the filament can become unstable and develop oscillations. The nature of the observed instabilities, as well as overall theoretical and experimental significance of the findings, is discussed

Off-limb EUV observations of the solar corona and transients with the CORONAS-F/SPIRIT telescope-coronagraph

The SPIRIT telescope aboard the CORONAS-F satellite (in orbit from 26 July 2001 to 5 December 2005), observed the off-limb solar corona in the 175 Å (Fe IX, X and XI lines) and 304 Å (He II and Si XI lines) bands. In the coronagraphic mode the mirror was tilted to image the corona at the distance of 1.1...5 <I>R</I><sub>sun</sub> from the solar center, the outer occulter blocked the disk radiation and the detector sensitivity was enhanced. This intermediate region between the fields of view of ordinary extreme-ultraviolet (EUV) telescopes and most of the white-light (WL) coronagraphs is responsible for forming the streamer belt, acceleration of ejected matter and emergence of slow and fast solar wind. We present here the results of continuous coronagraphic EUV observations of the solar corona carried out during two weeks in June and December 2002. The images showed a "diffuse" (unresolved) component of the corona seen in both bands, and non-radial, ray-like structures seen only in the 175 Å band, which can be associated with a streamer base. The correlations between latitudinal distributions of the EUV brightness in the corona and at the limb were found to be high in 304 Å at all distances and in 175 Å only below 1.5 <I>R</I><sub>sun</sub>. The temporal correlation of the coronal brightness along the west radial line, with the brightness at the underlying limb region was significant in both bands, independent of the distance. On 2 February 2003 SPIRIT observed an expansion of a transient associated with a prominence eruption seen only in the 304 Å band. The SPIRIT data have been compared with the corresponding data of the SOHO LASCO, EIT and UVCS instruments