Soil radon gas in some soil types in the rainy season in Ho Chi Minh City, Vietnam

The influence of different types of granite on indoor radon concentrations of dwellings in the South African West Coast Peninsula

“…The average indoor radon concentrations of both towns are below the IAEA's recommended level of 300 Bq/m 3 . It is comparable with countries with warmer climates, such as the Israel (Epstein, Koch, Riemer, Orion, & Haquin, 2013) and some Arab countries (Al-Azmi et al, 2012) A characteristic of a lognormal distribution is that the natural logarithm of the data will exhibit a normal distribution (Limpert, Stahel, & Abbt, 2001). As can be seen from Figures 8 and 9, both datasets exhibit this characteristic.…”

“…The International Commission for Radiological Protection (ICRP) and the International Atomic Energy Agency (IAEA) recommends that radon concentrations for dwellings should be below 300 Bq/m 3 (IAEA, 2015), while the World Health Organization (WHO) recommends that homeowners should take action when radon exceeds 100 Bq/m 3 . It is also important to note that finer grained particles, like the weathered granitic soils, would more readily support radon exhalation due to its larger exposed active areas (Nguyen, Nguyen, Vu, Nguyen, & Cong, 2018).…”

Ho Chi Minh's ideology on education

“…(1) education and training is the leading national policy, the cause of the Party, State and the whole people; (2) fundamentally and comprehensively renovate education and training; (3) development of education and training is to raise people's intellectual level, train human resources, foster talents; (4) education and training development must be associated with the needs of socio-economic development and national defense; with scientific and technological progress; consistent with objective laws; (5) renovating the education system in the direction of openness, flexibility, and connection between education levels and levels and between education and training modes; (6) actively promote the positive side, limit the negative side of the market mechanism, ensure the socialist orientation in education and training development; (7) proactively and actively integrate into the world to develop education and training, and at the same time, education and training must meet the requirements of international integration to develop the country (Nguyen et al, 2018;Thien et al, 2020).…”

Current Problems of Radiation-Ecological Monitoring in Penza Region

“…At present, in most cases the radioactivity of plants is defined by strontium and cesium radioisotopes. It is established that radionuclides mainly accumulate in needles (leaves), then in bark, branches, and the least -in wood [2].…”

“…Outdoor air and water supplied to buildings from artesian wells belong to other less significant sources of radon. Soil foundation of buildings is considered the main source of indoor radon [2]. Even at standard specific activity of radium-226 the concentration of radon in pore space of the soil foundation makes dozens of kilobecquerels per cubic meter.…”