Epidemiology of gastrointestinal bleedings compared in Ukraine and in the Poltava region

Acute gastrointestinal bleeding was and remains one of the severe emergency surgical diseases both in Ukraine and in other countries. The study of epidemiology, namely of the prevalence of gastrointestinal bleedings is relevant and will allow to intensify the diagnostic stage and create clearer algorithms for the treatment of this pathology. The aim of the work was to study the dynamics of emergency medical care for patients with gastrointestinal bleedings in Ukraine and the Poltava region. A statistical retrospective study of indicators of emergency medical care for patients with gastrointestinal bleedings in Ukraine and the Poltava region was conducted using data from official sources of the Center for Medical Statistics of the Ministry of Health of Ukraine. The wave-like nature of the increase in hospitalization of patients with gastrointestinal bleedings was observed in Ukraine and the Poltava region. The growth rates obtained as a result of the alignment of the dynamic series gave a clear trend towards the acceleration of the decline of this indicator: from -1.25 to -1.36 in Ukraine; and in the Poltava region before increasing the rate: from 4.85 to 3.62. During the entire studied period, the average level of hospitalization of patients with gastrointestinal bleeding after 24 hours was consistently higher in the Poltava region than in Ukraine (in Ukraine – 36.13% versus 43.16% in the Poltava region) (р<0.05). The rate of postoperative mortality in these patients in Ukraine increased (from 5.02% to 6.30%) (р<0.05)with gradual inhibition (the growth rate decreased). In the Poltava region, the level of the indicator exceeded the national level and the leveling of the dynamic series had a downward trend (from 12.4% to 10.38%) (р<0.05). Thus, the problem of gastrointestinal bleeding remains relevant at the present time, as it continues to remain one of the severe urgent surgical diseases, both in Ukraine as a whole and in its individual regions, in particular in the Poltava region. Peptic ulcer disease of the stomach and duodenum continues to remain the first nosology that causes gastrointestinal bleeding. Postoperative mortality remains high and ranges from 5% to 12%. The time of hospitalization from the onset of the disease to hospitalization is consistently higher in the Poltava region than in Ukraine (the average level in Ukraine is 36.13% versus 43.16% in Poltava region) (р<0.05)

МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ НЕКОТОРЫХ КРЕПЕЖНЫХ СОЕДИНЕНИЙ НА БАЗЕ ТЕОРИИ R-ФУНКЦИЙ

The functional approach is one of the most general approaches in geometrical modeling. The functional approach describes complex geometrical objects (like engines, aircrafts, etc.) using mathematical formulas. A popular method for representation geometrical object in mathematical formulas uses implicit functions. These implicit functions can be constructed using logical operations under functions called R-functions represent logical operations (negation, conjunction, disjunction, etc) under implicit functions. A fastener is a hardware device that mechanically joins or affixes two or more objects together. In the article authors propose geometrical models based on R-functions for different fasteners (some types of bolts, nuts). In the first section of the article authors describe implicit functions for representation of basic primitives (a regular polygon, a chamfer). The next section aims to obtain of 3D models of fasteners using R-functions under primitives. Some visual examples are shown in the final section.Анотаці

Background radioactivity of construction materials, raw substance and ready-made CaMoO4 crystals

The results of measurements of natural radioactive isotopes content in different source materials of natural and enriched composition used for CaMoO4 scintillation crystal growing are presented. The crystals are to be used in the experiment to search for neutrinoless double beta decay of 100Mo

First result of the experimental search for the 9.4 keV solar axion reactions with 83Kr in the copper proportional counter

The experimental search for solar hadronic axions is started at the Baksan Neutrino Observatory of the Institute for Nuclear Researches of Russian Academy of Science (BNO INR RAS). It is assumed that axions are created in the Sun during M1 transition between the first thermally excited level at 9.4 keV and the ground state in 83Kr. The experiment is based on axion detection via resonant absorption process by the same nucleus in the detector. The big copper proportional counter filled with krypton is used to detect signals from axions. The experimental setup is situated in the deep underground low background laboratory. No evidence of axion detection were found after the 26.5 days data collection. Resulting new upper limit on axion mass is mA ≤ 130 eV at 95% C.L. © 2015, Pleiades Publishing, Ltd101sciescopu