Results 61 to 70 of about 35,378 (207)

Correction of the radon exhalation rate using the Kalman filtering to reduce measurement errors

Nuclear Engineering and Technology
The RAD7 detector is widely used for measuring the radon exhalation rate from the surfaces of media such as soil, rocks, and building materials. However, during the measurement process, the accuracy of the results is prone to interference due to the ...
Haoyu You, Jianfeng Tang, Zhongkai Fan, Ruomei Xie, Hongzhi Yuan, Yanliang Tan   +5 more
doaj   +1 more source

Right main pulmonary artery distensibility on dynamic ventilation CT and its association with respiratory function

European Radiology Experimental
Background Heartbeat-based cross-sectional area (CSA) changes in the right main pulmonary artery (MPA), which reflects its distensibility associated with pulmonary hypertension, can be measured using dynamic ventilation computed tomography (DVCT) in ...
Tatsuya Oki, Yukihiro Nagatani, Shota Ishida, Masayuki Hashimoto, Yasuhiko Oshio, Jun Hanaoka, Ryo Uemura, Yoshiyuki Watanabe   +7 more
doaj   +1 more source

High-resolution spatiotemporal mapping of soil radon exhalation in China combining remote sensing and machine learning

Environment International
Radon (Rn), primarily generated via radium (Ra) decay in soil and exhaled across the soil–air interface, is a key source for natural ionizing radiation exposure.
Yupan Zhang, Weihai Zhuo, Bo Chen, Bin Feng   +3 more
doaj   +1 more source

Analysis of  226Ra content and 222Rn exhalation rates in soil samples from Wukro, Tigray, using SSNTDs [version 1; peer review: 1 approved, 2 approved with reservations]

F1000Research
Background Radon gas, a decay product of radium, is a significant environmental health risk due to its radioactive properties. Understanding the radium content and radon exhalation rates in soil is crucial for evaluating potential radiological hazards ...
Nigus Alene Assefa
doaj   +1 more source

Determination of Radon Exhalation Rates from Tiles (Marble, Granite and Ceramic) Using LR115 Type II Passive Technique

مجلة علوم ذي قار, 2019
Exhalation of 222Rn, ?-radioactive inert gas, is associated with the presence of 226Ra and it's ultimate precursor uranium in the earth crust. It is a useful quantity to compare the relative importance of different materials of tiles (marble, granite and
H Bakr
doaj  

Experimental study on gas permeability and radon control performance of red clay covering layer on uranium mill tailings pond

Scientific Reports
The decommissioning of uranium mill tailings pond generally employs covering layer to diminish radon exhalation, with soil permeability, thickness, and moisture content being essential considerations in assessing the efficacy of radon reduction.
Guokai Xiong, Jianyong Dai, Hong Wang, Pei Lv, Xiangjiang Wang   +4 more
doaj   +1 more source

Verification of the applicability of the RAD7 radon monitor to the solid radon source exhalation reference model

Nuclear Engineering and Technology
The RAD7 radon monitor, based on the electrostatic collection method, is sensitive to humidity during measurements, necessitating the use of a desiccant to maintain the relative humidity in its built-in chamber less than 10 %.
Huiying Li, Ruomei Xie, Zhongkai Fan, Shuaibin Liu, Shuai Yuan, Jiale Sun, Haibo Yi, Zhipeng Liu, Jiulin Wu, Hongzhi Yuan, Yanliang Tan   +10 more
doaj   +1 more source

Edaphic and meteorological parameters as determinants of radon exhalation and its environmental implication in Peruvian agroecosystems

Scientific Reports
Radon exhalation is a natural process by which atoms of the radioactive gas radon diffuse in the soil and then exhale to an indoor and/or outdoor environment.
B. Pérez, L. C. Stieff, R. E. Ponce-Amanca, C. J. Guevara-Pillaca, D. Palacios   +4 more
doaj   +1 more source

Box breathing and prolonged exhalation reduces markers of physiological stress reactivity in response to a virtual trier social stress test. [PDF]

Compr Psychoneuroendocrinol
McAllister MJ, Martaindale MH, Sutton N, Andersen JP.   +3 more
europepmc   +1 more source

Respiratory phase alignment across memory encoding and retrieval improves task efficiency. [PDF]

Sci Rep
Nakamura NH, Yoshino K, Fukunaga M.
europepmc   +1 more source