Boundary Between Stable and Unstable Regimes of Accretion

We investigated the boundary between stable and unstable regimes of accretion and its dependence on different parameters. Simulations were performed using a "cubed sphere" code with high grid resolution (244 grid points in the azimuthal direction), which is twice as high as that used in our earlier studies. We chose a very low viscosity value, with alpha-parameter alpha=0.02. We observed from the simulations that the boundary strongly depends on the ratio between magnetospheric radius r_m (where the magnetic stress in the magnetosphere matches the matter stress in the disk) and corotation radius r_cor (where the Keplerian velocity in the disk is equal to the angular velocity of the star). For a small misalignment angle of the dipole field, Theta=5 degrees, accretion is unstable if r_cor/r_m>1.35, and is stable otherwise. In cases of a larger misalignment angle of the dipole, Theta=20 degrees, instability occurs at slightly larger values, r_cor/r_m>1.41.Comment: 4 pages, 4 figures, conference proceedings: "Physics at the Magnetospheric Boundary", Geneva, Switzerland, 25-28 June, 201

MHD Simulations of Magnetospheric Accretion, Ejection and Plasma-field Interaction

We review recent axisymmetric and three-dimensional (3D) magnetohydrodynamic (MHD) numerical simulations of magnetospheric accretion, plasma-field interaction and outflows from the disk-magnetosphere boundary.Comment: 11 pages, 8 figures, conference proceedings: "Physics at the Magnetospheric Boundary", Geneva, Switzerland, 25-28 June, 201

2-aminoaethanesulfonic acid compounds possess protective property in reperfusion-induced heart jnjury

The study aim was to explore pharmacological effects of 2-aminoaethansulfonic acid compounds in reperfusion-induced heart injury. The study was performed on rats and dogs of both sexes, isolated rats’ hearts. Two compounds of 2-aminoethanesulfonic acid, magnesium-containing (LBK-527) and phenylacetamide-containing (LKhT-317) were investigate

On local anesthetic action of some dimethylacetamide compounds

The study aim was to explore local anesthetic properties of some tertiary and quaternary derivatives of dimethylacetamid

On mechanism of antiarrhythmic action of some dimethylphenylacetamide derivatives

The study aim was to identify essential elements of the antiarrhythmic action mechanism of tertiary and quaternary derivatives of Dimethylphenylacetamide. The study was conducted in albino rats and mice of both sexes; isolated neurons of mollusc Limnea stagnalis; and strips of rats’ right ventricle myocardium. Two compounds of Dimethylphenylacetamide LKhT- 3-00 and LKhT-12-02 were studie

Математическая модель стеганографической системы на основе ключевой информации в виде стегонаборов

A formal description of the mathematical model of a steganographic system based on key information in the form of stegosets is given. The mathematical model of the steganographic system is intended both for placing hidden marks to control the integrity of documents acting as a container, and for covert data transmission. Exist-ing mathematical models do not fully meet the requirements for steganographic systems. The proposed model is based on the concepts of a three-level key, a stegoset, a container component, and a message block. The three-level key is a set of actual steganographic transformations depending on the type of container. A stegoset is an element of a key set. A component of a container is such a subset of it that there is a stegoset for it. A message block is such a sequential part of the message that there is a container component for it, in which it can be hidden using the appropriate stegoset. The model implements the application of different stegosets to different container compo-nents, and the message can be divided into blocks. The model allows controlling the integrity of the message and adapts to different types of containers. Possible options for the practical application of the mathematical model are proposed, such as monitoring the integrity of the message when calculating the control number, splitting the message into blocks and sequentially monitoring their integrity by analogy with the blockchain system.Приведено формальное описание математической модели стеганографической системы, основанной на ключе-вой информации в виде стегонаборов. Математическая модель стеганографической системы предназначена как для размещения скрытых меток для контроля целостности документов, выступающих в качестве контейнера, так и для скрытой передачи данных. Существующие математические модели не полностью удовлетворяют требованиям, предъявляемым к стеганографическим системам. Предлагаемая модель строится на основе понятий трехуровневого ключа, стегонабора, компонента контейнера, блока сообщения и контрольного числа. Трехуровневый ключ представляет собой множество фактических стеганографических преобразований в зав-симости от типа контейнера. Стегонабор представляет собой элемент множества ключа. Компонентом стегоконтейнера является такое его подмножество, что для него существует стегонабор. Блоком сообщения является такая последовательная часть сообщения, что для нее существуют компонент контейнера, в котором она может быть скрыта при помощи соответствующего стегонабора. Модель реализует применение различных стегонаборов к различным компонентам контейнера, причем сообщение может разбиваться на блоки. Модель позволяет контролировать целостность цифровых меток и скрытого сообщения. Предлагаются возможные варианты практического применения математической модели, такие как контроль целостности сообщения при вычислении контрольного числа, разбиение сообщения на блоки и последовательный контроль их целостно-сти по аналогии с системой блокчейн

Covid-19 Pandemic in Political Cartoons of the American Press: An Experience of Multimodal Analysis

An attempt is made to analyze the place of political cartoons in the current socio-political media discourse in the United States. The material was the cartoons published in the spring of 2020 from USA Today and Philadelphia Inquirer, the informational occasion for the creation of which was the Covid-19 pandemic. The definitions of political cartoons as a multimodal text with a complex coding system is considered in the article. It is noted that in this type of text, phenomenological cognitive structures are actualized both through linguistic projection and through visual-spatial images. Attention is paid to intertextuality as the basis of political cartoon: the authors proceed from the position that the decoding of meaning by the recipient depends on whether he and the author have common background knowledge. It is shown that the Covid-19 pandemic is thematically embedded in the broader socio-political agenda, whereby a successful interpretation requires the recipient to have background knowledge of the current socio-political challenges facing the United States, namely the domestic political agenda. It is stated that the studied cartoons are distinguished by their reliance on precedent, and the actualization of background knowledge occurs through a combination of the visual and verbal components of the text. It is concluded that among the linguistic means of creating a satirical effect, a play on words is distinguished based on the literal and figurative meaning of individual lexical units