Results 31 to 40 of about 5,509,012 (200)

Measurement of the radon and thoron exhalation rates from the water surface of Yixin lake

Nuclear Engineering and Technology
The importance of determining the radon exhalation rate from water surface is emphasized by the increased use of radon and its daughter products as tracers in large-scale circulation studies of the atmosphere.
Jiulin Wu, Shuaibin Liu, Tao Hu, Fen Lin, Ruomei Xie, Shuai Yuan, Haibo Yi, Yixiang Mo, Jiale Sun, Linquan Cheng, Huiying Li, Zhipeng Liu, Zhongkai Fan, Yanliang Tan   +13 more
doaj   +1 more source

Estimation of global radon exhalation rate distribution

AIP Conference Proceedings, 2008
A radon exhalation rate distribution model was developed, which considers dependency on soil water saturation, soil temperature and soil texture. The global averages of the radon exhalation rates were calculated to be 17.5 and 18.0 mBq·m^{-2}·s^{-1} by the model with different input soil moisture data. These values were slightly smaller than the widely-
Masayoshi Goto, Jun Moriizumi, Hiromi Yamazawa, Takao Iida, Weihai Zhuo, Anselmo Salles Paschoa, Friedrich Steinhäusler   +6 more
openaire   +1 more source

Fuzzy optimal control of multilayer coverage based on radon exhalation dynamics in uranium tailings

Scientific Reports, 2023
Radon exhalation from uranium tailings has seriously affected environmental safety and human health. Many uncertain parameters, such as diffusion coefficient, porosity, percolation rate, material particle size, etc., are related to the diffusion and ...
Meirong Zhang, Jianyong Dai
doaj   +1 more source

QUANTIFICATION OF BACK DIFFUSION IN RADON AND THORON EXHALATION RATE MEASUREMENTS

Radiation Protection Dosimetry, 2020
Abstract The radon (222Rn) and thoron (220Rn) fluxes from the soil and building materials are the major contributors to their indoor levels. Hence, the measurement of radon and thoron exhalation rates from the source matrix becomes the foremost step in controlling the indoor radon and thoron exposure.
N, Chitra, S Bala, Sundar, V, Subramanian, M T, Jose, R, Baskaran, B, Venkatraman   +5 more
openaire   +2 more sources

Natural Fracture Ventilation Altering the Ground Thermal Regime in Unstable Rock Slopes—A Case Study From Western Norway

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 11, November 2026.
Abstract Open bedrock fractures are common features in unstable rock slopes and alter subsurface thermal conditions of fractured rock masses through convective air ventilation and atmospheric exchange. These processes are particularly relevant in cold mountain environments, where variations in ground temperature affect rock mass stability and may allow
T. Scheiber, P. Snook, L. Schild, A. Maschler, H. Haanes   +4 more
wiley   +1 more source

Experimental study on the radon exhalation characteristics of block walls currently used in China

Nuclear Engineering and Technology
In order to establish a predictive model for indoor radon concentration in Chinese buildings, walls were constructed using Chinese-style bricks to study the relationship between radon exhalation rates and indoor radon concentrations, as well as the ...
Shuyuan Liu, Li Zhang, Jinsheng Jiang, Xin Wang, Jimin Zhao, Lihai Zheng, Yongzhong Ma, Zhen Zhang, Qiang Xiong, Yanhui Sui, Shanshan Bo, Wei Cheng, Dong Yan, Tianyu Teng, Lixin Gao, Kuke Ding   +15 more
doaj   +1 more source

Greater Mouse‐Tailed Bats Glide During Approximately 50% of Their Flight

Annals of the New York Academy of Sciences, Volume 1564, Issue 1, October 2026.
ABSTRACT Flapping flight is widely regarded as a mechanically complex and energetically demanding mode of locomotion. In bats, the evolution of flapping flight is hypothesized to have arisen from gliding, an unpowered form of aerial movement. Although intermittent flap‐gliding flight is considered advantageous in many bird species, this flight strategy
Mor Taub, Aya Goldshtein, Yotam Orchan, Sivan Toledo, Ran Nathan, Yossi Yovel   +5 more
wiley   +1 more source

Radon Gas Concentrations in Soil and Radon Exhalation Rates in Thiqar City

Engineering and Technology Journal, 2016
First part to determination concentrations of Rn-222 in surface samples of soil, the highest average concentration of Rn-222 was found in AL-Refai region was equal to (127.500±2 Bq/m3), while lowest the average was found in AL-Aekeckh region which was equal to (33.750±2.2 Bq/m3), with an average value of (75.875±21.8 Bq/m3) ,while the (RER) was found ...
Nada F. Tawfiq, Hazim L. Mansour, Mahmood S. Karim   +2 more
openaire   +2 more sources

Obstructive Sleep Apnea: Epidemiology, Pathophysiology, Complications, Diagnosis, Management, and Emerging Fibrosis‐Linked Remodeling

MedComm, Volume 7, Issue 8, August 2026.
Obstructive sleep apnea (OSA) is characterized by recurrent upper‐airway collapse, which generates key nocturnal stressors including intermittent hypoxia, sleep fragmentation, intrathoracic pressure stress, and sympathetic activation. These physiological disturbances converge on shared biological mechanisms, including oxidative stress, inflammation ...
Nhi Ho Thi Thuy, Thị Hằng Giang Phan, Ali Hussein Eid, Paola Maccioccu, Stefania Camboni, Gavino Casu, Anna Maria Posadino, Roberta Giordo, Gianfranco Pintus   +8 more
wiley   +1 more source

Radon exhalation rates corrected for leakage and back diffusion – Evaluation of radon chambers and radon sources with application to ceramic tile

Journal of Radiation Research and Applied Sciences, 2014
The natural radon decay, leakage and back diffusion are the main removal processes of radon from its container. Ignoring these processes leads to underestimate the measured value of radon related parameters like exhalation rate and radium content.
M. Abo-Elmagd
doaj   +1 more source