A New Technique for the Calculation and 3D Visualisation of Magnetic Complexities on Solar Satellite Images

YesIn this paper, we introduce two novel models for processing real-life satellite images to quantify and then visualise their magnetic structures in 3D. We believe this multidisciplinary work is a real convergence between image processing, 3D visualization and solar physics. The first model aims to calculate the value of the magnetic complexity in active regions and the solar disk. A series of experiments are carried out using this model and a relationship has been indentified between the calculated magnetic complexity values and solar flare events. The second model aims to visualise the calculated magnetic complexities in 3D colour maps in order to identify the locations of eruptive regions on the Sun. Both models demonstrate promising results and they can be potentially used in the fields of solar imaging, space weather and solar flare prediction and forecasting

stawarz.p65

Abstract PicoRad system based on activated charcoal collectors and liquid scintillation counter is one of the most popular passive methods of radon measurements which may be used both indoors and in other environments such as caves, tunnels, mines etc. It is well known that charcoal is also a very good adsorber of water vapor and it can reduce adsorption efficiency for radon. In PicoRad collectors, the charcoal is mixed with a dessicant to lower this effect. A series of expositions of PicoRad detectors was performed in a Central Laboratory for Radiological Protection (CLOR) radon calibration/climatic chamber to study the effect of high relative humidity on the airborne radon concentration measurements and the dependence of the results on the duration of exposure. The results obtained from the PicoRad system were referred to the mean concentrations delivered by an AlphaGUARD monitor, Genitron (GmbH), Germany. The main conclusions are the following: 1) the PicoRad system results are not affected by high relative humidity, including extreme values of 90−96%, for the duration of exposure up to ca. 24 h; 2) in the relative humidity range of 75−96% the correction coefficient linearly depends on the duration of exposure reaching a value of ca. 16 for 96 h exposure; 3) the PicoRad system delivers results corresponding better to the mean value of radon concentration in the last 6 h interval of exposure than that in the whole exposure duration. This finding is particularly important for the calibration of PicoRad collectors in the conditions of decreasing radon concentration due to radon decay

Radiological assessment of radionuclide contents in soils in Lower Silesian Voivodeship in the years 1988-2014

Abstract. In 1986, the Chernobyl disaster provoked the uncontrolled release of significant amounts of radioactive substances, which caused surface contamination in Poland through radioactive isotopes. The most affected areas are Opole Voivodeship and part of Lower Silesian Voivoideship. Unfavorable meteorological conditions consisting of strong winds blowing from Chernobyl and local heavy rains favored the spread of a radioactive cloud, its shifting towards Poland and the accumulation of artificial isotopes in the soils of those regions [1]. Samples of the soils surface layers (0 - 10 cm) collected in different regions of Lower Silesian Voivodeship during the period 1988 - 2014 were studied. Changes in concentrations over time were analyzed for the following natural and artificial radionuclides: cesium (137Cs and 134Cs), potassium (40K), radium (226Ra) and actinium (228Ac). Since the disaster, the concentration of 137Cs in the surface layer decreased continuously over time. The mean concentration of 137Cs in the surface layer in Lower Silesian Voivodeship in 2014 was 1.46 kBq/m2, higher than the mean concentration for the whole Poland at 1.33 kBq/m2 [2]. Mean concentrations of other natural radionuclide such as 226Ra, 228Ac and 40K in the soils of Lower Silesian Voivodeship were also found to be higher than for the whole Poland [2]

Radiological assessment of radionuclide contents in soils in Lower Silesian Voivodeship in the years 1988-2014

Abstract. In 1986, the Chernobyl disaster provoked the uncontrolled release of significant amounts of radioactive substances, which caused surface contamination in Poland through radioactive isotopes. The most affected areas are Opole Voivodeship and part of Lower Silesian Voivoideship. Unfavorable meteorological conditions consisting of strong winds blowing from Chernobyl and local heavy rains favored the spread of a radioactive cloud, its shifting towards Poland and the accumulation of artificial isotopes in the soils of those regions [1]. Samples of the soils surface layers (0 - 10 cm) collected in different regions of Lower Silesian Voivodeship during the period 1988 - 2014 were studied. Changes in concentrations over time were analyzed for the following natural and artificial radionuclides: cesium (137Cs and 134Cs), potassium (40K), radium (226Ra) and actinium (228Ac). Since the disaster, the concentration of 137Cs in the surface layer decreased continuously over time. The mean concentration of 137Cs in the surface layer in Lower Silesian Voivodeship in 2014 was 1.46 kBq/m2, higher than the mean concentration for the whole Poland at 1.33 kBq/m2 [2]. Mean concentrations of other natural radionuclide such as 226Ra, 228Ac and 40K in the soils of Lower Silesian Voivodeship were also found to be higher than for the whole Poland [2]

Measurements of natural radioactivity in soil samples collected in the Kampinoski National Park

In this article are presented the results of measurements of natural radioactivity in twelve soil samples from the Kampinoski National Park by using high purity germanium detector (HPGe). The average values of the natural radionuclides 40K, 226Ra and 228Ac concentrations in the soil samples are 8.54, 6.65 and 206 Bq/kg respectively. Additionally radiation hazard indices were calculated to evaluate the radiological risk for the public and environment. The results show that the mean values of radium equivalent activity (Raeq) and gamma absorbed dose rate (D) in the air, outdoor annual effective dose equivalent (Eout), and representative level index (Iγ) for analyzed samples were lower than the limit recommended by the United Nations Scientific Committee on the Effect of Atomic Radiation (UNSCEAR). This study is the first to evaluate the radiological impacts in the investigation area

Radioactivity of waste materials coming from the largest power plants in Poland

The Central Laboratory of Radiological Protection together with 30 other laboratories in Poland is involved in the analysis of radioactivity among indirect products of combustion (ashes and slags) coming from polish power plants and thermal power station. Systematic studies are conducted on the concentrations of natural radioactive isotopes in waste materials obtained from the power industry, and their results are recorded in a database. This database is supervised by the Central Laboratory for Radiological Protection. The database already contains 46300 by now and the oldest results come from the eighties. In this article the results of studies on radioactive concentration of natural radioisotopes 40K, 226Ra and 228Th in waste materials coming from the largest power plants in our country are presented. Furthermore an analysis was carried out on the possibility to use the selected waste materials (ashes and slags) in housing construction, road construction and in public facilities buildings, considering the values of activity indexes f1 and f2