Decision Support System for Urbanization of the Northern Part of the Volga-Akhtuba Floodplain (Russia) on the Basis of Interdisciplinary Computer Modeling

There is a computer decision support system (CDSS) for urbanization of the northern part of the Volga-Akhtuba floodplain. This system includes subsystems of cognitive and game-theoretic analysis, geoinformation and hydrodynamic simulations. The paper presents the cognitive graph, two-level and three-level models of hierarchical games for the cases of uncontrolled and controlled development of the problem situation. We described the quantitative analysis of the effects of different strategies for the spatial distribution of the urbanized territories. For this reason we conducted the territory zoning according to the level of negative consequences of urbanization for various agents. In addition, we found an analytical solution for games with the linear dependence of the average flooded area on the urbanized area. We numerically computed a game equilibrium for dependences derived from the imitational geoinformation and hydrodynamic modeling of flooding. As the result, we showed that the transition to the three-level management system and the implementation of an optimal urbanization strategy minimize its negative consequences.Comment: 14 pages, 5 figures; Conference: Creativity in Intelligent Technologies and Data Science. CIT&DS 201

Mechanochemistry and solubilization of drugs

The results on solubilization of poorly water-soluble drugs, indomethacin, piroxicam, and meloxicam, with the help of mechanochemical methods are presented. The mechanocomposites of the drugs with various excipients, including soluble polymers and non-soluble fine porous inorganic oxides, were obtained by co-grinding using vibrational and planetary centrifugal mills. The samples obtained revealed higher release rate and apparent solubility of the drugs with respect to the initial ones. Nevertheless, in some cases, e.g. for composites of piroxicam with alumina and ferric oxide, decreasing the release rate and solubility of the drug was observed suggesting the formation of poorly soluble strong drug - carrier associates

Room Temperature Coherent and Voltage Tunable Terahertz Emission from Nanometer-Sized Field Effect Transistors

We report on reflective electro-optic sampling measurements of TeraHertz emission from nanometer-gate-length InGaAs-based high electron mobility transistors. The room temperature coherent gate-voltage tunable emission is demonstrated. We establish that the physical mechanism of the coherent TeraHertz emission is related to the plasma waves driven by simultaneous current and optical excitation. A significant shift of the plasma frequency and the narrowing of the emission with increasing channel's current are observed and explained as due to the increase of the carriers density and drift velocity.Comment: 3 figure

Field Effect Transistors for Terahertz Detection: Physics and First Imaging Applications

Resonant frequencies of the two-dimensional plasma in FETs increase with the reduction of the channel dimensions and can reach the THz range for sub-micron gate lengths. Nonlinear properties of the electron plasma in the transistor channel can be used for the detection and mixing of THz frequencies. At cryogenic temperatures resonant and gate voltage tunable detection related to plasma waves resonances, is observed. At room temperature, when plasma oscillations are overdamped, the FET can operate as an efficient broadband THz detector. We present the main theoretical and experimental results on THz detection by FETs in the context of their possible application for THz imaging.Comment: 22 pages, 12 figures, review pape

FIRST TRIES OF USING INNOVATIONAL CAPSO VISION CAPSULE ENDOSCOPY SYSTEM IN TREATING CHILDREN

Vide-capsule  endoscopy has been used successfully in treating children to assess the condition of the small intestine in spots that are not available to conventional endoscopy. The article presents the innovative technical characteristics of the new system for videocapsule endoscopy  — Capso Vision Capsule Endoscopy  System: panoramic view, provided  by the side optics, and data storage in the video processor  of the capsule itself. The article presents  the results of the diagnostic system in treatment of 5 children with a description  of the detected pathological changes. Both the positive aspects and disadvantages  of Capso Vision Capsule Endoscopy System in treatment of children are discussed

ПЕРВЫЙ ОПЫТ ПРИМЕНЕНИЯ У ДЕТЕЙ ИННОВАЦИОННОЙ ЭНДОСКОПИЧЕСКОЙ ВИДЕОКАПСУЛЬНОЙ СИСТЕМЫ С ПАНОРАМНЫМ ОБЗОРОМ

Vide-capsule  endoscopy has been used successfully in treating children to assess the condition of the small intestine in spots that are not available to conventional endoscopy. The article presents the innovative technical characteristics of the new system for videocapsule endoscopy  — Capso Vision Capsule Endoscopy  System: panoramic view, provided  by the side optics, and data storage in the video processor  of the capsule itself. The article presents  the results of the diagnostic system in treatment of 5 children with a description  of the detected pathological changes. Both the positive aspects and disadvantages  of Capso Vision Capsule Endoscopy System in treatment of children are discussed.Видеокапсульная эндоскопия успешно применяется у детей для оценки состояния тонкой кишки в отделах, не доступных для традиционной эндоскопии. В статье представлены инновационные технические характеристики новой системы для проведения видеокапсульной эндоскопии — CapsoVision Capsule Endoscopy System: панорамный обзор, который обеспечивается боковой оптикой, и сохранение данных на видеопроцессоре самой капсулы. В статье представлены результаты  применения диагностической системы у 5 детей с описанием обнаруженных патологических изменений. Обсуждаются как положительные стороны, так и недостатки применения видеокапсульной системы у детей