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Journal articles on the topic 'Radon Features'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 June 2024

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1

Gordon, Kelsey, Paul Terry, Xingxing Liu, et al. "Radon in Schools: A Brief Review of State Laws and Regulations in the United States." International Journal of Environmental Research and Public Health 15, no. 10 (2018): 2149. http://dx.doi.org/10.3390/ijerph15102149.

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Exposure to Radon, a colorless, naturally occurring radioactive gas, is one of leading causes of lung cancer, and may pose a significant long-term risk for school age children. We examined the regulations and statutes in each US state related to radon in schools to delineate key features of policies and discrepancies among states that may have public health implications. Search terms such as “radon”, “school”, “mitigation”, “certification”, “licensing”, and “radon resistant new construction” were used to scan current statutes from each state legislature’s website and regulations from official

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2

Yazzie, Sheldwin A., Scott Davis, Noah Seixas, and Michael G. Yost. "Assessing the Impact of Housing Features and Environmental Factors on Home Indoor Radon Concentration Levels on the Navajo Nation." International Journal of Environmental Research and Public Health 17, no. 8 (2020): 2813. http://dx.doi.org/10.3390/ijerph17082813.

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Uranium is naturally found in the environment as a radioactive metal element with high concentrations in the Southwestern US. In this region is the Navajo Nation, which spans approximately 69,930 square kilometers. A decay product of uranium is radon gas, a lung carcinogen that has no color, odor, or taste. Radon gas may pass from soil into homes; and, indoor accumulation has been associated with geographical location, seasonality, home construction materials, and home ventilation. A home and indoor radon survey was conducted from November 2014 through May 2015, with volunteers who reported re

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3

Zheng, Xia, Wei Wei, Houbing Song, and Wei Li. "Sealing Clay Text Segmentation Based on Radon-Like Features and Adaptive Enhancement Filters." Mathematical Problems in Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/983601.

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Text extraction is a key issue in sealing clay research. The traditional method based on rubbings increases the risk of sealing clay damage and is unfavorable to sealing clay protection. Therefore, using digital image of sealing clay, a new method for text segmentation based on Radon-like features and adaptive enhancement filters is proposed in this paper. First, adaptive enhancement LM filter bank is used to get the maximum energy image; second, the edge image of the maximum energy image is calculated; finally, Radon-like feature images are generated by combining maximum energy image and its

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4

Guo, Hongjun, and Lili Chen. "An Image Similarity Invariant Feature Extraction Method Based on Radon Transform." International Journal of Circuits, Systems and Signal Processing 15 (April 8, 2021): 288–96. http://dx.doi.org/10.46300/9106.2021.15.33.

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With the advancements of computer technology, image recognition technology has been more and more widely applied and feature extraction is a core problem of image recognition. In study, image recognition classifies the processed image and identifies the category it belongs to. By selecting the feature to be extracted, it measures the necessary parameters and classifies according to the result. For better recognition, it needs to conduct structural analysis and image description of the entire image and enhance image understanding through multi-object structural relationship. The essence of Rado

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Khorzova, L. I., O. S. Vlasova, N. Yu Klimenti, S. I. Golubeva, and D. V. Tekushin. "Specific regional features of radon activity in environmental objects and indoor spaces in the Volgograd region." IOP Conference Series: Earth and Environmental Science 1061, no. 1 (2022): 012018. http://dx.doi.org/10.1088/1755-1315/1061/1/012018.

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Abstract The protection and preservation of human health under present-day conditions of high urbanization rate is one of the priority tasks of contemporary construction. And here, the environmental safety of the residential buildings to be constructed is one of the most important factors. It is significantly affected by ionizing radiation for which radioactive radon gas is one of the sources. The level of public exposure depends on the concentration of radon in the aerial environment of outdoor territories and indoor spaces. The article considers the radon-related characteristics of the terri

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DESAI, BN. "Possible Radon concentration over the Indian Seas during the southwest monsoon season on the basis of climatic features of the area and utilization of the of the Radon results for identifying air masses." MAUSAM 20, no. 3 (2022): 253–56. http://dx.doi.org/10.54302/mausam.v20i3.5454.

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Important climatic features during the southwest monsoon season over the north Indian Ocean, the Arabian Sea and the Bay of Bengal have been described, and on the basic of ama's results that the southeast trades air is poor and the continental air rich in radon, possible concentration of radon over the area has been discussed. It is considered that radon results should be interpreted taking into account the prevailing synoptic features as ordinarily pure air masses may not be present over the Indian Seas north of the equator.

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Yang, Jianwei, Liang Zhang, and Peiyao Li. "Radon–Fourier descriptor for invariant pattern recognition." International Journal of Wavelets, Multiresolution and Information Processing 17, no. 02 (2019): 1940004. http://dx.doi.org/10.1142/s0219691319400046.

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Radon transform is not only robust to noise, but also independent on the calculation of pattern centroid. In this paper, Radon–Mellin transform (RMT), which is a combination of Radon transform and Mellin transform, is proposed to extract invariant features. RMT converts any object into a closed curve. Radon–Fourier descriptor (RFD) is derived by applying Fourier descriptor to the obtained closed curve. The obtained RFD is invariant to scaling and rotation. (Generic) R-transform and some other Radon-based methods can be viewed as special cases of the proposed method. Experiments are conducted o

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8

Sykes, Michael P., and Umesh C. Das. "Directional filtering for linear feature enhancement in geophysical maps." GEOPHYSICS 65, no. 6 (2000): 1758–68. http://dx.doi.org/10.1190/1.1444860.

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Geophysical maps of data acquired in ground and airborne surveys are extensively used for mineral, groundwater, and petroleum exploration. Lineaments in these maps are often indicative of contacts, basement faulting, and other tectonic features of interest. To aid the interpretation of these maps, a versatile processing technique of directional filtering, based on the 2-D “normal” Radon transform, is used to enhance or suppress specific lineaments. Synthetic data and field examples using electromagnetic and radiometric data are used to demonstrate the superiority of the Radon transform method

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SANTOSH, K. C., BART LAMIROY, and LAURENT WENDLING. "DTW–RADON-BASED SHAPE DESCRIPTOR FOR PATTERN RECOGNITION." International Journal of Pattern Recognition and Artificial Intelligence 27, no. 03 (2013): 1350008. http://dx.doi.org/10.1142/s0218001413500080.

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In this paper, we present a pattern recognition method that uses dynamic programming for the alignment of Radon features. The key characteristic of the method is to use dynamic time warping (DTW) to match corresponding pairs of the Radon features for all possible projections. Thanks to DTW, we avoid compressing the feature matrix into a single vector which would otherwise miss information. To reduce the possible number of matchings, we rely on a initial normalization based on the pattern orientation. A comprehensive study is made using major state-of-the-art shape descriptors over several publ

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Leshukov, Timofey, Aleksey Larionov, Ekaterina Nastavko, Philipp Kaizer, and Konstantin Legoshchin. "Features of Degassing from Overburden Rock Massifs: A Case Study Using Radon." Earth 5, no. 1 (2023): 1–19. http://dx.doi.org/10.3390/earth5010001.

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Overburden rock massifs resulting from open-pit coal mining are very common objects in the world’s mining regions. These locations pose a significant challenge as the global mining industry expands. These dumps are capable of self-burning for quite a long time. The displacement and sliding of these massifs can cause catastrophic consequences. In addition, these objects emit a significant amount of greenhouse gases into the atmosphere. Therefore, it is necessary to manage such objects and implement appropriate measures to limit their impact on the environment. In this work, we studied soil rado

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Telichenko, Valery, Vladimir Rimshin, Alexander Kalaydo, and Marya Semenova. "Prediction of the Radon Situation in Buildings Constructed Under the Renovation Program." E3S Web of Conferences 457 (2023): 02041. http://dx.doi.org/10.1051/e3sconf/202345702041.

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The paper is devoted to the study of the regularities of the radon situation formation in modern multi-storey buildings at the design stage. Calculation schemes for radon entry into the premises of the lower and upper floors are constructed, a method for determination of radon concentration in the building after its erection is proposed. It is based on a joint analysis of the soil base physical and mechanical characteristics of and the design features of the underground shell of the building. According to the calculations results, a significant role of air exchange in the formation of a favora

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Williams, Alastair G., Wlodek Zahorowski, Scott Chambers, et al. "The Vertical Distribution of Radon in Clear and Cloudy Daytime Terrestrial Boundary Layers." Journal of the Atmospheric Sciences 68, no. 1 (2011): 155–74. http://dx.doi.org/10.1175/2010jas3576.1.

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Abstract Radon (222Rn) is a powerful natural tracer of mixing and exchange processes in the atmospheric boundary layer. The authors present and discuss the main features of a unique dataset of 50 high-resolution vertical radon profiles up to 3500 m above ground level, obtained in clear and cloudy daytime terrestrial boundary layers over an inland rural site in Australia using an instrumented motorized research glider. It is demonstrated that boundary layer radon profiles frequently exhibit a complex layered structure as a result of mixing and exchange processes of varying strengths and extents

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13

Mancini, Simona, and Michele Guida. "Development of a Pre-Diagnosis Procedure for the Evaluation of Indoor Radon Potential in Buildings." WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT 20 (October 26, 2023): 1–7. http://dx.doi.org/10.37394/232015.2024.20.1.

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Indoor radon accumulation is considered the main source of human exposure to ionizing radiation. Depending on the average radon level, indoor long-term exposure can significantly increase the risk of lung cancer onset. The publication of international regulations on the protection of human health the exposure of ionizing radiation, defining threshold values over whom health consequences for occupants could be expected, led to the control and testing of radon levels in workplaces and premises using multiple techniques and approaches. In particular, since the main source of radon is soil, many e

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14

K, Charan Kumar. "Study of Atmospheric Instabilities through Radioactivity." Mapana - Journal of Sciences 14, no. 1 (2017): 15–23. http://dx.doi.org/10.12723/mjs.32.3.

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Radon and its progeny concentration are measured at 1m height from surface of Earth in the premises of National Atmospheric Research Laboratory, Gadanki to observe the changes in activity concentration of radon particularly during instabilities that are occurring in the atmosphere. The measurements were carried out using AlphaGUARD and Alpha Progeny Meter for the measurement of radon and its progenies, respectively. It has been observed that, the changes in daily and weekly atmospheric radon levels are related to the stability or turbulence of the lower troposphere. The analysis reveals that f

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Singaravelan, Shanmugasundaram, and Dhanushkodi Murugan. "Robust automatic visual method for determining facial angles from profile view images." Media, culture and public relations 10, no. 1 (2019): 6–18. http://dx.doi.org/10.32914/mcpr.10.1.1.

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A analysis of human facial images has become increasingly important due to its numerous applications. In this regards, extracting facial parameter is vital and various studies have been done in this field. Hence in our proposed work, first time up to our knowledge, a robust automatic method is introduced for determining facial angles from profile view images using radon transform. Radon transform is a kind of linear integration along a specific direction and angles play an important role to do this transform. The global features were rather considered by constructing a linear discriminant anal

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16

Xie, Yan Shi, Kai Xuan Tan, Liang Chen, Kai Guang Hu, Zheng Qing Wang, and Xiu Cai Wang. "Fractal Analysis of Spatial Distribution of Radon Exhalation Rates of Uranium Mill Tailings." Advanced Materials Research 524-527 (May 2012): 584–87. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.584.

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A uranium mill tailings, located in Guangdong, was selected for spatial distribution of the radon exhalation rates measured by local static method. The two-dimension surface of radon exhalation rates was established by Surfer using the data of spatial distribution of radon exhalation rates measured at August 14, 2007 to 19 and 21, which was analyzed by fractal method of projective covering. The results show that the two-dimension surface of radon exhalation rates is of fractal structure. The fractal dimension of surface of radon exhalation rates from August 14, 2007 to 19 and 21 are 2.0535, 2.

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17

Ma, Jinlin, and Ziping Ma. "3D Radon Transform for Shape Retrieval Using Bag-of-Visual-Features." International Arab Journal of Information Technology 17, no. 4 (2019): 471–79. http://dx.doi.org/10.34028/iajit/17/4/5.

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In order to improve the accuracy and efficiency of extracting features for 3D models retrieval, a novel approach using 3D radon transform and Bag-of-Visual-Features is proposed in this paper. Firstly the 3D radon transform is employed to obtain a view image using the different features in different angels. Then a set of local descriptor vectors are extracted by the SURF algorithm from the local features of the view. The similarity distance between geometrical transformed models is evaluated by using K-means algorithm to verify the geometric invariance of the proposed method. The numerical expe

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18

Yu, Ying, Cai Lin Dong, Bo Wen Sheng, Wei Dan Zhong, and Xiang Lin Zou. "The New Approach to the Invariant Feature Extraction Using Ridgelet Transform." Applied Mechanics and Materials 651-653 (September 2014): 2241–44. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.2241.

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With the aim to meet the requirements of multi-directional choice, the paper raise a new approach to the invariant feature extraction of handwritten Chinese characters, with ridgelet transform as its foundation. First of all, the original images will be rotated to the Radon circular shift by means of Radon transform. On the basis of the characteristic that Fourier transform is row shift invariant, then, the one-dimensional Fourier transform will be adopted in the Radon domain to gain the conclusion that magnitude matrixes bear the rotation-invariance as a typical feature, which is pretty benef

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19

le Roux, Rikus, and Jacques Bezuidenhout. "Assessment of Radon and Naturally Occurring Radionuclides in the Vredefort Meteorite Crater in South Africa." Atmosphere 14, no. 12 (2023): 1826. http://dx.doi.org/10.3390/atmos14121826.

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The concentric impact rings of the Vredefort Crater contain rocks with elevated uranium concentrations resulting from the geological signature of a meteoric impact. The decay of this uranium was estimated to lead to elevated indoor radon concentrations in the Crater, but such a study has never been carried out. This study explores the relationship between the natural radionuclides i-0found in the geology of the Vredefort Crater and indoor radon concentrations. This was achieved through soil sampling and radionuclide surveys conducted on three impact rings, supplemented by indoor radon measurem

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20

Jónás, Jácint, Zoltán Sas, Janja Vaupotic, Erika Kocsis, János Somlai, and Tibor Kovács. "Thoron emanation and exhalation of Slovenian soils determined by a PIC detector-equipped radon monitor." Nukleonika 61, no. 3 (2016): 379–84. http://dx.doi.org/10.1515/nuka-2016-0063.

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Abstract The health risk from thoron (Rn-220) is usually ignored owing to its short half-life (55.6 s), but the generated thoron decay products can cause a significant dose contribution. In this study, altogether 51 Slovenian soil samples were investigated using an accumulation chamber technique to obtain information about thoron exhalation features. The obtained (massic) thoron exhalation results varied between 6.9 and 149 mBq·kg−1·s−1 (average: 55.2 mBq·kg−1·s−1). The Th-232 content was determined using HPGe gamma spectrometry. The Th-232 activity concentration ranged between 9.3 and 161.7 B

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Slashchov, Ihor, Anatolii Bielikov, Andrii Kulbach, and Olena Slashchova. "Forecast of the mine workings destruction risks by the radiometric control method." IOP Conference Series: Earth and Environmental Science 1156, no. 1 (2023): 012033. http://dx.doi.org/10.1088/1755-1315/1156/1/012033.

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Abstract The stress-strain state of the rock mass affects the content of methane gas and radon aerosols in the atmosphere of mine workings. Therefore, combined control of methane gas and radon in mine workings allows us to monitor changes in the state of the rock massif and to take measures in proper time to reduce the risks of the roadway destruction. Forecasting of rock massif and mine roadway dangerous state is based on the determined features of methane gas emission together with radon decay products into the mine roadways radon decay products. Interdependence between the dynamics of chang

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22

Grossi, Claudia, Daniel Rabago, Scott Chambers, et al. "Characterizing the automatic radon flux transfer standard system Autoflux: laboratory calibration and field experiments." Atmospheric Measurement Techniques 16, no. 10 (2023): 2655–72. http://dx.doi.org/10.5194/amt-16-2655-2023.

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Abstract. High-quality, long-term measurements of terrestrial trace gas emissions are important for investigations of atmospheric, geophysical and biological processes to help mitigate climate change and protect the environment and the health of citizens. High-frequency terrestrial fluxes of the radioactive noble gas 222Rn, in particular, are useful for validating radon flux maps and used to evaluate the performance of regional atmospheric models, to improve greenhouse gas emission inventories (by the radon tracer method) and to determine radon priority areas for radiation protection goals. A

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COREȚCHI, Liuba, Ala OVERCENCO, Aurelia ABABII, Angela CAPATINA, Valeriu BÎLBA, and Ion SALARU. "Contribution to the study of "smoking and radon" interaction in the lung cancer development across the Republic of Moldova." One Health & Risk Management 5, no. 1 (2023): 9–19. http://dx.doi.org/10.38045/ohrm.2024.1.02.

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Introduction. The most important risk factors for lung cancer are the tobacco smoking and residential radon exposure. The study of the interaction of smoking x radon as trigger factor for lung cancer morbidity in the Republic of Moldova was carried out. Material and methods. Data on tobacco smoking prevalence of the national study STEPS 2021, lung cancer morbidity data of 2012-2020 and data of radon measurements using RADTRAK2 during 2018-2021 were used. Data processing tools included summary statistics and cluster analysis. Results. The distribution of high radon values, the numbe

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KOJIMA, Hiroshi, Katsuhiro NAGANO, Kazuhiko MIURA, Takeshi HARA, Shigeru HAKAE, and Hirotaka OTOBE. "Basin Geographical Features in Rias Coast and Radon Concentration." RADIOISOTOPES 54, no. 11 (2005): 521–29. http://dx.doi.org/10.3769/radioisotopes.54.521.

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Khvashchevskaya, A. A., Yu G. Kopylova, D. A. Novikov, et al. "Isotope-hydrogeochemical features of the Belokurikha field radon waters." Earth sciences and subsoil use 44, no. 2 (2021): 174–83. http://dx.doi.org/10.21285/2686-9993-2021-44-2-174-183.

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The purpose of the work is to carry out integrated isotope-geochemical studies of the mineral waters of the Belokurikha deposit. The methods of titrimetry, ion chromatography, inductively coupled plasma mass spectrometry (ICPMS) have been used in the laboratory investigation of the chemical composition of waters. The isotope composition of oxygen, hydrogen and carbon in dissolved carbon dioxide has been studied with the help of the Isotope Ratio Mass Spectrometer FinniganTM MAT 253 equipped with the attachments for sample preparation H/Device (to analyze the δD ratio) and GasBench II (to analy

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Liu, Y. L., G. J. Xin, and Y. Xiao. "Robust Image Hashing Using Radon Transform and Invariant Features." Radioengineering 25, no. 3 (2016): 556–64. http://dx.doi.org/10.13164/re.2016.0556.

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Sasithradevi, A., and S. Mohamed Mansoor Roomi. "Video classification and retrieval through spatio-temporal Radon features." Pattern Recognition 99 (March 2020): 107099. http://dx.doi.org/10.1016/j.patcog.2019.107099.

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Zhou, Yipeng, Xing Wang, You Chen, and Yuanrong Tian. "Specific Emitter Identification via Bispectrum-Radon Transform and Hybrid Deep Model." Mathematical Problems in Engineering 2020 (January 13, 2020): 1–17. http://dx.doi.org/10.1155/2020/7646527.

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Specific emitter identification is a technique that distinguishes different emitters using radio fingerprints. Feature extraction and classifier selection are critical factors affecting SEI performance. In this paper, we propose an SEI method using the Bispectrum-Radon transform (BRT) and a hybrid deep model. We propose BRT to characterize the unintentional modulation of pulses due to the superiority of bispectrum distributions in characterizing nonlinear features of signals. We then apply a hybrid deep model based on denoising autoencoders and a deep belief network to perform further deep fea

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Lara, E., Z. Rocha, T. O. Santos, F. J. Rios, and A. H. Oliveira. "Soil features and indoor radon concentration prediction: radon in soil gas, pedology, permeability and 226Ra content." Radiation Protection Dosimetry 167, no. 1-3 (2015): 126–29. http://dx.doi.org/10.1093/rpd/ncv228.

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Wilson, D. L., C. S. Dudney, and R. B. Gammage. "An Interim Protocol for the Mitigation of Radon in Non-Residential Buildings." Radiation Protection Dosimetry 56, no. 1-4 (1994): 9–11. http://dx.doi.org/10.1093/oxfordjournals.rpd.a082411.

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Abstract To date, the US Environmental Protection Agency has not published guidance for radon testing, diagnostics, or mitigation within large, non-residential buildings. Current research indicates that large buildings may contain construction features or mechanical systems that could inhibit the installation or operation of a mitigation system. Health and safety issues such as asbestos and fire codes may further interfere with the installation process. Studies also show that elevated radon can be restricted to a particular area or room within a building and not be uniformly distributed. A fou

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Mancini, Simona, Michele Guida, Albina Cuomo, and Domenico Guida. "A geogenic approach for the Radon monitoring and the exposure assessment at a regional scale: The results of the Rad_Campania project." Advances in Geosciences 52 (November 5, 2020): 87–96. http://dx.doi.org/10.5194/adgeo-52-87-2020.

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Abstract. The aim of this paper is to analyse and discuss the results of the regional program Rad Campania for the monitoring and the assessment of the radon risk. An innovative methodology, based on a geogenic approach, was developed, supported by a comprehensive campaign of radon measurement performed in soil gas, natural waters, drinking natural water samples and indoor air. Data refer to field measurements carried out in three provinces of the Campania Region (Italy): Salerno, Avellino and Benevento. The programme was completed with the main purpose to investigate the peculiarities of the

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Sahoo, B. K., and B. K. Sapra. "Advances in Measurement of Indoor ²²²Rn and ²²⁰Rn Gas Concentrations Using Solid State Nuclear Track Detectors." Solid State Phenomena 238 (August 2015): 116–26. http://dx.doi.org/10.4028/www.scientific.net/ssp.238.116.

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Solid State Nuclear Track Detectors (SSNTDs) have been widely used for time integrated radon measurements due to their cost effectiveness, portability and easy-to-use feature. In order to obtain a proper measurement of radon using SSNTDs, it is necessary to select a proper exposure mode. The various modes in which the SSNTDs can be exposed are: (i) bare mode, (ii) single cup mode, and (iii) twin cup mode. This paper addresses the merits and demerits of SSNTDs used in each type of mode of exposure for radon monitoring. The paper analyses the results of the conventional bare mode as well as the

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Smith, Leonard, and Mitko Voutchkov. "Assessment of Radon Levels in Drinking Water Wells in St. Catherine, Jamaica." Journal of Health and Pollution 7, no. 16 (2017): 31–37. http://dx.doi.org/10.5696/2156-9614-7.16.31.

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Background. Radon is a known carcinogen and contaminant in drinking water wells, but is not monitored in drinking water quality programs in Jamaica. Objective. The present study was conducted to obtain radon data in local drinking water and evaluate potential health risks. The data will contribute to determining the level of compliance to public health criteria for radon and to develop a monitoring program based on the identified risks. Methods. This study assesses the concentration of radon in 22 drinking water wells in the parish of St. Catherine, Jamaica. Samples were collected for radon, w

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Martins, Lisa, Alcides Pereira, Alcino Oliveira, Luís F. Sanches Fernandes, and Fernando A. L. Pacheco. "A New Framework for the Management and Radiological Protection of Groundwater Resources: The Implementation of a Portuguese Action Plan for Radon in Drinking Water and Impacts on Human Health." Water 11, no. 4 (2019): 760. http://dx.doi.org/10.3390/w11040760.

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In general, this study was developed to assess the radon contamination in groundwater intended for human consumption, to raise awareness among policy-makers to implement a legal framework for drinking water management and the radiological protection of groundwater resources. Thus, we analyzed with parallel coordinate visualization (PCV) plots what features may influence the water–rock interaction and promote high-radon concentrations in water intended for human consumption. The results show that in granitic areas composed by biotite granites (Group V), although there is a higher radon producti

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Hamdi, Dhekra El, Ines Elouedi, Mai K. Nguyen, and Atef Hamouda. "A Conic Radon-based Convolutional Neural Network for Image Recognition." International Journal of Intelligent Systems and Applications 15, no. 1 (2023): 1–12. http://dx.doi.org/10.5815/ijisa.2023.01.01.

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This article presents a new approach for image recognition that proposes to combine Conical Radon Transform (CRT) and Convolutional Neural Networks (CNN). In order to evaluate the performance of this approach for pattern recognition task, we have built a Radon descriptor enhancing features extracted by linear, circular and parabolic RT. The main idea consists in exploring the use of Conic Radon transform to define a robust image descriptor. Specifically, the Radon transformation is initially applied on the image. Afterwards, the extracted features are combined with image and then entered as an

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Yakovlev, Evgeny, and Andrey Puchkov. "Radon over Kimberlite Pipes: Estimation of the Emanation Properties of Rocks (Lomonosov Diamond Deposit, NW Russia)." Applied Sciences 11, no. 13 (2021): 6065. http://dx.doi.org/10.3390/app11136065.

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In this paper, using the example of the Lomonosov diamond deposit, experimental studies of rocks were carried out to assess the main radiation and physical factors affecting the formation of the radon field over the kimberlite pipes of the Arkhangelsk diamondiferous province. For various types of rocks, represented by vent kimberlites, tuffaceous-sedimentary rocks of the crater and enclosing and overlying sediments, the following were studied: porosity, density, activity of radium-226, activity of radon in a free state, level of radon production, and emanation coefficient. The research results

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Wu, Pei-Yu, Tim Johansson, Mikael Mangold, Claes Sandels, and Kristina Mjörnell. "Evaluating the indoor radon concentrations in the Swedish building stock using statistical and machine learning." Journal of Physics: Conference Series 2654, no. 1 (2023): 012086. http://dx.doi.org/10.1088/1742-6596/2654/1/012086.

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Abstract Exposure to excessive indoor radon causes around 500 lung cancer deaths in Sweden annually. However, until 2020, indoor radon measurements were only conducted in around 16% of Swedish single-family houses and 17% of multifamily houses. It is estimated that approximately 16% of single-family houses exceed the indoor radon reference level of 200 Bq/m3, and the corresponding situation in multifamily houses is unknown. Measuring indoor radon on an urban scale is complicated and costly. Statistical and machine learning, exploiting historical data for pattern identification, provides altern

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Orlyuk, M. I., І. І. Onyshchuk, А. О. Romenets, A. V. Marchenko, P. O. Yatsevsky, and І. М. Orliuk. "Radon and magnetic anomalies in the territory of the city Kyiv: environmental aspect." Geofizicheskiy Zhurnal 43, no. 1 (2021): 227–50. http://dx.doi.org/10.24028/gzh.0203-3100.v43i1.2021.225551.

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Magnetic and radon anomalous fields are essential geophysical entities of environment which determine to a considerable degree its ecological state. Revelation of magnetic and radon anomalous zones is an urgent task for the studies of geo-environmental state of the territory and appraisal of its ecological safety. The greatest danger is produced by the areas where the faults are localized with radon anomalies related in the upper part of the Earth crust. For the territory of Kyiv geological characteristics of the studied area has been reviewd, schemes of regional and accompanying faults have b

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H.Almourish, Mohammed, Nishwan A.Al-khulaidi, Amin A. Mokbel, and Ahmed Y. A. Saeed. "The Classification of the Heart Rate Variability Using Radon Transform with Back-Propagation Neural Networks." International Journal of Innovative Science and Research Technology 5, no. 6 (2020): 974–78. http://dx.doi.org/10.38124/ijisrt20jun872.

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This paper will present an algorithm for Heart Rate Variability HRV signals classifications. In this algorithm we used Radon transform of binary matrix of scatter-gram of heart rate HRV signals to extract features of binary matrix. Artificial neural network (ANN) technique with back-propagation networks (BPN) was used for binary matrix features classifications. Radon transform with 90 projections was selected because it presented the best inverse Radon transform that gave a closer image of the original scatter-gram. The optimum numbers of neurons in the hidden layer of BPN is 145 was obtained.

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Mc Laughlin, J. P. "DOSIMETRIC AND EPIDEMIOLOGICAL APPROACHES TO RADON LUNG CANCER RISK ASSESSMENT." Radiation Protection Dosimetry 184, no. 3-4 (2019): 285–89. http://dx.doi.org/10.1093/rpd/ncz082.

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Abstract The two principal approaches used to assess the risk of lung cancer due to radon exposure are those based on dosimetric modelling and on epidemiology. Outline accounts are given of the main features of dosimetric models that have evolved over past decades. The main results of some occupational and residential epidemiological studies are also discussed. The doubling of the ICRP radon dose conversion factors estimated using the epidemiological based dose conversion convention in the period 1993–2010 are discussed. Also discussed is the more recent ICRP approach in which it is recommende

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Venoso, G., M. Pugliese, V. Roca, and C. Sabbarese. "A radon facility at Naples University: Features and first tests." Applied Radiation and Isotopes 67, no. 5 (2009): 863–66. http://dx.doi.org/10.1016/j.apradiso.2009.01.082.

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Chelbi, S., and A. Mekhmoukh. "Features based image registration using cross correlation and Radon transform." Alexandria Engineering Journal 57, no. 4 (2018): 2313–18. http://dx.doi.org/10.1016/j.aej.2017.07.013.

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Chambaudet, A., V. Pautov, D. Klein, and G. Barenboim. "Features of a new Russian track detector for radon measurement." Nuclear Tracks and Radiation Measurements 22, no. 1-4 (1993): 289–90. http://dx.doi.org/10.1016/0969-8078(93)90070-k.

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Novikov, Dmitry, Anton Derkachev, and Anna Sukhorukova. "HYDROGEOCHEMISTRY OF THE ZAELTSOVSKY-MOCHISHCHE FIELD OF RADON WATERS." Interexpo GEO-Siberia 2, no. 1 (2019): 125–32. http://dx.doi.org/10.33764/2618-981x-2019-2-1-125-132.

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Results of the studies into the features of the geochemistry of radon waters from the Zaeltovsky-Mochishche zone of Novosibirsk city are reported. Radon waters are fracture, cold with the temperature of 6-10 оC, they occur at a depth of 50-200 m. In the hydrogeological section, neutral and weakly alkaline waters are developed, with рН from 6,9 to 7,8, mainly with the calcium hydrocarbonate and calcium-sodium hydrocarbonate composition, with total mineralization from 322 to 895 mg/dm3. The concentrations of 222Rn in water-saturated zones of granites vary from 308 to 1521 Bq/dm3, while in the we

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Sasnouski, Alexey V., Aram R. Avetisov, Janna A. Lukashevich, Leu L. Vasileuski, Dilshod A. Hakimov, and Irina K. Kirievich. "Dose exposure to the population of Lunints and Mikashevichi due to radon in residential air." Journal of the Belarusian State University. Ecology., no. 3 (September 30, 2022): 54–61. http://dx.doi.org/10.46646/2521-683x/2022-3-54-61.

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This article contains information about the levels of radon in the air of residential premises in the settlements of Luninets and Mikashevichi and their environs (Brest region, Republic of Belarus), as well as doses to the population of these territories, formed by the inhalation intake of this radioactive noble gas. The study of the integral weighted average value of the volumetric activity of radon in the air of residential premises was carried out by the track method using integrated radon track radiometers based on an accredited laboratory. Based on data on the content of radon in the air

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Ponomareva, Mira Leonidovna, Sergey Nikolaevich Ponomarev, Gulnaz Suleimanovna Mannapova, et al. "Influence of sowing date and variety features of winter rye plants on photosynthetic indicators." Agrarian Scientific Journal, no. 12 (December 29, 2021): 59–63. http://dx.doi.org/10.28983/asj.y2021i12pp59-63.

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The concentration of pigments and chlorophyll potential in the tissues of various organs of three varieties of winter rye during plant ontogenesis were studied. New varieties of winter rye Radon, Podarok and Zilant were sown in 3 data with an interval of 10 days, starting from August 25. Sampling for plant analyses of photosynthetic activity was carried out at the beginning of flowering and milk stage of the grain in 2018-2019. Differences between the varieties were revealed, both chlorophyll content in assimilating organs and their total accumulation in different periods of the growing season

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Yakovlev, G. A., та V. S. Yakovleva. "Особенности скорости выхода радона из грунта в приземную атмосферу". Вестник КРАУНЦ. Физико-математические науки, № 2 (5 липня 2021): 150–58. http://dx.doi.org/10.26117/2079-6641-2021-35-2-150-158.

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The paper presents the results of the analysis of long-term series of monitoring data on the radon flux density. They were produced using a accumulation chamber of our own design, which allows, in terms of the readings of alpha radiation counters, to obtain the values of the radon flux density. The main results and the most illustrative examples of the behavior of the investigated characteristic of radon are present in the work. As a result, conclusions were drawn about the features of radon release rate from the soil into the surface atmosphere at different time scales and under different met

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Mahajan, S., V. Walia, B. S. Bajwa, et al. "Soil-gas radon/helium surveys in some neotectonic areas of NW Himalayan foothills, India." Natural Hazards and Earth System Sciences 10, no. 6 (2010): 1221–27. http://dx.doi.org/10.5194/nhess-10-1221-2010.

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Abstract. The present research is aimed at accessing the relationship between variation in the soil gases radon (222Rn) and helium (4He) and recently developed fissures and other neotectonic features in Nurpur and Nadha areas of the NW Himalayas, India. Two soil-gas surveys were conducted on/near known faults to reconfirm their position using soil gas technique and to check their present activity. During these surveys, soil-gas samples were collected along traverses crossing the observed structures. The data analysis reveals that the concentrations of radon and helium along the Dehar lineament

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Buzynnyi, M. G., and L. L. Mykhailova. "Total Alpha activity and Radon-222 activity in the underground water of some regions of Ukraine." Environment & Health 99 (2) (June 2021): 36–44. http://dx.doi.org/10.32402/dovkil2021.02.036.

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Objective: We aimed to analyze the results of the measurements of the total alpha activity and activity of radon-222 in the water of artesian wells to establish the geographical regions of Ukraine which require a deep attention to the assessment of the radioactivity of the groundwater. Methods: We used empirical, analytical, radiometric, spectrometric methods and method of mathematical statistics in the study. Materials: We carried out a statistical analysis of the results of the measurements of the total alpha activity and the activity of radon-222 in water samples from the artesian wells of

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Guzeeva, S. A., and A. Ya Mitrikovsky. "PARTICULAR FEATURES OF RADON ACCUMULATION IN THE AIR OF RESIDENTIAL PREMISES." Современные наукоемкие технологии (Modern High Technologies), no. 2 2019 (2019): 38–42. http://dx.doi.org/10.17513/snt.37405.

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