Corrected model for transport in static diffusion chamber

In present consideration for the static diffusion chamber the model of mass and heat transfer and its analytical solution are presented for the pseudo-open in one direction system

Electron Positron Capture Rates and the Steady State Equilibrium Condition for Electron-Positron Plasma with Nucleons

The reaction rates of the beta processes for all particles at arbitrary degeneracy are derived, and an {\it analytic} steady state equilibrium condition $\mu_n=\mu_p+2\mu_e$ which results from the equality of electron and positron capture rates in the hot electron-positron plasma with nucleons is also found, if the matter is transparent to neutrinos. This simple analytic formula is valid only if electrons are nondegenerate or mildly degenerate, which is generally satisfied in the hot electron-positron plasma. Therefore, it can be used to efficiently determine the steady state of the hot matter with plenty of positrons. Based on this analytic condition, given the baryon number density and the temperature, if the nucleons are nondegenerate, only one algebraic equation for determining the electron fraction is obtained, which shows the great advantage of the analytic equilibrium condition.Comment: Accepted for publication in Phys. Rev.

Trends in childhood leukemia incidence in urban countries and their relation to environmental factors, including space weather

Leukemia is the most common cancer in children. Its incidence has been increasing worldwide since 1910th, suggesting the presence of common sources of the disease, most likely related to people’s lifestyle and environment. Understanding the relationship between childhood leukemia and environmental conditions is critical to preventing the disease. This discussion article examines established potentially-carcinogenic environmental factors, such as vehicle emissions and fires, alongside space weather-related parameters like cosmic rays and the geomagnetic field. To discern the primary contributor, we analyze trends and annual variations in leukemia incidence among 0-14-year-olds in the United States, Canada, Australia, and Russia from 1990 to 2018. Comparisons are drawn with the number of vehicles (representing gasoline emissions) and fire-affected land areas (indicative of fire-related pollutants), with novel data for Russia introduced for the first time. While childhood leukemia incidence is rising in all countries under study, the rate of increase in Russia is twice that of other nations, possibly due to a delayed surge in the country’s vehicle fleet compared to others. This trend in Russia may offer insights into past leukemia levels in the USA, Canada, and Australia. Our findings highlight vehicular emissions as the most substantial environmental hazard for children among the factors examined. We also advocate for the consideration of potential modulation of carcinogenic effects arising from variations in cosmic ray intensity, as well as the protective role of the geomagnetic field. To support the idea, we provide examples of potential space weather effects at both local and global scales. The additional analysis includes statistical data from 49 countries and underscores the significance of the magnetic field dip in the South Atlantic Anomaly in contributing to a peak in childhood leukemia incidence in Peru, Ecuador and Chile. We emphasize the importance of collectively assessing all potentially carcinogenic factors for the successful future predictions of childhood leukemia risk in each country

MOLECULAR MARKING OF SUNFLOWER LINES WITH DIFFERENT ABILITY TO SUPPRESSION OF THE CYTOPLASMIC MALE STERILITY PHENOTYPE

Ninety five lines of sunflower genetic collection differing by their ability to suppress the CMS phenotype were molecularly marked with the use of 7 primer pairs. Using the STS marker orfH522, a sterile (PET1) cytoplasmon was identified in 79 lines, which confirmed indirectly the presence of fertility restoration genes in their genotypes. The majority of these lines also have a complex of molecular markers linked to the Rf1 gene. The HRG01, HRG02 and STS115 markers showed the best diagnostic value in revealing the Rf1 gene in the examined material. The data on allelic variation of the microsatellite loci ORS224, ORS511 and ORS799 were obtained for the first time

Features of fire alarm and fire extinguishing vehicles

Рассмотрен комплексный подход в организации противопожарной защиты транспортных средств.An integrated approach to the organization of fire protection of vehicles is considered

Smoke exhaust in closed parking garage

Рассмотрен подход к проектированию противодымной вентиляции пристроенных подземных гаражей-стоянок. Приведен расчет параметров системы

ПОВЫШЕНИЕ ЭФФЕКТИВНОСТИ УКРЫТИЯ ЭЛЕКТРОЛИЗЕРОВ СОДЕРБЕРГА

The Soderberg aluminum reduction technology is associated with high pollutant emissions including gaseous and poorly soluble fluorides. Currently, conventional VSS cells equipped with a standard gas skirt and a burner do not meet the modern hooding efficiency requirements. The existing technology must be upgraded in order to comply with environmental regulations. The environmentally friendly Soderberg technology implemented with an upgraded gas skirt and a fundamentally new 4-dome gas removal system ensures daily average hooding efficiency of 97,4 %.Получение алюминия на электролизерах Содерберга сопряжено с выбросами в атмосферу большого количества загрязняющих веществ, включая газообразные и плохо растворимые фториды. В настоящее время рядовые электролизеры Содерберга, оснащенные стандартным газосборным колоколом и горелочными устройствами, не отвечают современным требованиям по эффективности укрытия. Для достижения нормативных экологических требований необходима модернизация существующей технологии. Внедрение технологии экологичного Содерберга, оснащенного модернизирован- ным газосборным колоколом и принципиально новой четырехкупольной системой газоудаления, обеспечивает среднесуточную эффективность укрытия 97,4 %

Application of cognitive modeling in project management

The article is devoted to the consideration of environmental and social factors in the management of territories and enterprises. Such consideration is crucial for the sustainable development of the territories. The authors use cognitive modeling as a tool. Building a model of the system in the form of a weighted oriented graph allows to take into account factors of different nature in complex interaction. Information for building a model can be obtained from a baseline environmental assessment or an economic and HSE audit of the target enterprise. The analysis of the constructed model allows us to assess the state of the simulated system, to detect the crisis or pre-crisis state, to suggest ways of optimal development of the system, or, if necessary, a way out of the crisis. Thus, the analysis of the existing enterprise model will help to find optimal solutions for enterprise management. With a more general approach, the analysis of the region model will help to determine the criteria for sustainable development of the region and the direction of optimal development. Analysis of the model of the planned enterprise in the system of the region will help to assess the feasibility of the project in terms of sustainable development of the region. Thus, the construction of cognitive models can be used as a tool for strategic environmental assessment and to support decision-making on project management throughout the project cycle. As an example, the modeling of the system of oil-producing regions of Russia is considered. © SGEM2018

Cognitive analysis of the socio-ecological and economic system of the region for choosing a sustainable development strategy (on the example of oil-producing regions of Russia)

To correspond with Strategy of Russian regional development and sustainable development aims, in the article we propose to base strategy development on the results of modelling and analysis of socioenvironmental-economic region systems in the form of oriented graphs. Authors developed model for oil exploring regions Urals Federal district, based on open source data and lacking information is identified, as well as types and ways of it's gathering for completion of the modelling process. © The Authors, published by EDP Sciences, 2020