Inverse Problems Involving Generalized Axial-Symmetric Helmholtz Equation

MSC 2010: 35J05, 33C10, 45D0

Determination of Maintaining Time of Temperature Traces of Aerosol Droplet Water Flows During Motion in a Flame

To develop fire fighting technologies, the temperatures of combustible products were measured after passing an aerosol droplet flow of water through the flames (with monitored temperatures). It was applied the aerosol flows with droplets of sizes less than 100 [mu]m, 100-200 [mu]m, and 200-300 [mu]m. Investigations were conducted at a temperature of combustible products from 500 K to 900 K. Temperatures of gases in droplet flow traces and maintaining times of relatively low temperatures in these areas (it can be considered as temperature trace) were defined. It was obtained the satisfactory agreement of experimental results and numerical simulation data

The role of crypto-currencies in the development of the global currency system

The world monetary system is in the process of transition to a new level of development under the influence of the process of financial globalization, economic integration, as well as the activation of electronic currencies turnover. In these conditions, it is necessary to understand the causes of the changes and their possible consequences. One of the possible options for the development of the world monetary system can be the use of crypto-currency as international money.peer-reviewe

Состояние новорожденных после конверсии эпидуральной анальгезии в анестезию при кесаревом сечении: проспективное рандомизированное исследование

АКТУАЛЬНОСТЬ: При проведении эпидуральной анальгезии (ЭА) в родах в случае необходимости оперативного родоразрешения встает вопрос о выборе дальнейшей тактики регионарной анестезии. В статье рассмотрены особенности влияния местных анестетиков на состояние новорожденного при проведении конверсии ЭА в анестезию при необходимости выполнения операции кесарева сечения в зависимости от используемого местного анестетика. ЦЕЛЬ ИССЛЕДОВАНИЯ: Оценить состояние новорожденного при проведении конверсии ЭА в родах через естественные родовые пути в анестезию при кесаревом сечении в зависимости от применяемого местного анестетика. МАТЕРИАЛЫ И МЕТОДЫ: Проведено проспективное рандомизированное исследование 143 детей, рожденных от матерей, которым проводили конверсию ЭА в анестезию для оперативного родоразрешения методом кесарева сечения. В зависимости от используемого местного анестетика пациенток распределили на три группы, в 1-й группе в эпидуральное пространство вводили 20,0 мл 2 % раствора лидокаина в комбинации с 0,1 мг эпинефрина, во 2-й группе — 20,0 мл 0,5 % раствора бупивакаина, в 3-й — 20,0 мл 0,75 % раствора ропивакаина. Оценку состояния новорожденных проводили по шкале Апгар на 1-й и 5-й минутах жизни и по шкале NACS в первые 15 мин, через 2, 24 и 72 ч после рождения. РЕЗУЛЬТАТЫ: Оценка новорожденных по шкале Апгар независимо от применяемого местного анестетика при эпидуральной анестезии на 1-й и 5-й минутах соответствовала 7 баллам и более (р > 0,05). Психоневрологическое состояние новорожденных при оценке по шкале NACS статистически значимо не различалось во всех группах и на всех этапах исследования. Внутри каждой группы между этапами исследования средние значения оценок по NACS статистически значимо увеличивались по сравнению с предыдущим. ВЫВОДЫ: Конверсия ЭА в родах через естественные родовые пути в анестезию при кесаревом сечении безопасна для плода и новорожденного при использовании 20,0 мл 2 % раствора лидокаина в комбинации с 0,1 мг эпинефрина или 20,0 мл 0,5 % раствора бупивакаина либо 0,75 % раствора ропивакаина в объеме 20,0 мл

The ART-XC telescope on board the SRG observatory

ART-XC (Astronomical Roentgen Telescope - X-ray Concentrator) is the hard X-ray instrument with grazing incidence imaging optics on board the Spektr-Roentgen-Gamma (SRG) observatory. The SRG observatory is the flagship astrophysical mission of the Russian Federal Space Program, which was successively launched into orbit around the second Lagrangian point (L2) of the Earth-Sun system with a Proton rocket from the Baikonur cosmodrome on 13 July 2019. The ART-XC telescope will provide the first ever true imaging all-sky survey performed with grazing incidence optics in the 4-30 keV energy band and will obtain the deepest and sharpest map of the sky in the energy range of 4-12 keV. Observations performed during the early calibration and performance verification phase as well as during the on-going all-sky survey that started on 12 Dec. 2019 have demonstrated that the in-flight characteristics of the ART-XC telescope are very close to expectations based on the results of ground calibrations. Upon completion of its 4-year all-sky survey, ART-XC is expected to detect ~5000 sources (~3000 active galactic nuclei, including heavily obscured ones, several hundred clusters of galaxies, ~1000 cataclysmic variables and other Galactic sources), and to provide a high-quality map of the Galactic background emission in the 4-12 keV energy band. ART-XC is also well suited for discovering transient X-ray sources. In this paper, we describe the telescope, results of its ground calibrations, major aspects of the mission, the in-flight performance of ART-XC and first scientific results.Comment: 19 pages, 30 figures, accepted for publication in Astronomy and Astrophysic

Self-medication for infants with colic in Lagos, Nigeria

<p>Abstract</p> <p>Background</p> <p>Infantile colic is a self-limiting condition that is distributed worldwide. It is often misdiagnosed as an organic disease for which an infant is admitted to the hospital. Many studies have described the aetiopathogenesis, pharmacologic and non-pharmacologic management of colic but none has evaluated self-medication for infants with colic. The aim of this study was therefore to determine the knowledge of Nigerian mothers about colic, their home-based management, extent of self-medication for the infants with colic and the types of medicines involved.</p> <p>Methods</p> <p>It is a prospective study conducted at the vaccination clinics of 20 primary health care centres, each from different Local Government Areas in Lagos, Nigeria. Eight hundred mothers that brought their infants for vaccination between April and September, 2006 were interviewed with open-and close-ended questionnaire.</p> <p>Results</p> <p>Six hundred and eighty three (85.4%) mothers claimed they had a good knowledge of colic. Incessant and excessive cry was the main clinical feature of colic identified by 430(62.9%) mothers. Three hundred and seventy eight (67.7%) infants were treated by self-medication, 157 (28.1%) sought medical intervention and 17 (3.1%) were treated at a traditional birth attendant home. Herbal medicines constituted 51.8% of the self-medicated medicines, of which 48 (26.2%) were "Ororo Ogiri". Nospamin^®(49.5%) and Gripe water^®(43.0%) were the two frequently prescribed and self-medicated medicines for infants with colic.</p> <p>Conclusion</p> <p>Nigerian mothers are deficient in their knowledge of colic. Self-medication was the most frequently used home-based intervention. Health education would appear necessary to improve parental management of this self-limiting condition.</p

Experimental research of neutron yield and spectrum from deuterium gas-puff z-pinch on the GIT-12 generator at current above 2 MA

The Z-pinch experiments with deuterium gas-puff surrounded by an outer plasma shell were carried out on the GIT-12 generator (Tomsk, Russia) at currents of 2 MA. The plasma shell consisting of hydrogen and carbon ions was formed by 48 plasma guns. The deuterium gas-puff was created by a fast electromagnetic valve. This configuration provides an efficient mode of the neutron production in DD reaction, and the neutron yield reaches a value above 1012 neutrons per shot. Neutron diagnostics included scintillation TOF detectors for determination of the neutron energy spectrum, bubble detectors BD-PND, a silver activation detector, and several activation samples for determination of the neutron yield analysed by a Sodium Iodide (NaI) and a high-purity Germanium (HPGe) detectors. Using this neutron diagnostic complex, we measured the total neutron yield and amount of high-energy neutrons