List mode data acquisition technique for Compton suppression and minimum detectable activity (MDA) reduction in standard high-volume air samples

2022 ◽  
pp. 109964
Author(s):  
Mahdi Tourang ◽  
Asghar Hadadi ◽  
Mitra Athari Allaf ◽  
Dariush Sardari
Keyword(s):  
Data Acquisition ◽  
High Volume ◽  
Compton Suppression ◽  
Minimum Detectable Activity ◽  
List Mode ◽  
Air Samples ◽  
Detectable Activity ◽  
Acquisition Technique

scholarly journals Absence of Detectable Radionuclides in Breast Milk in Sendai, Japan in 2012 Even by High-Sensitivity Determination: Estimated Dose among Infants after the Fukushima Nuclear Disaster

2021 ◽  
Vol 18 (11) ◽  
pp. 5825
Author(s):  
Zhaoqing Lyu ◽  
Sani Rachman Soleman ◽  
Tomoko Fujitani ◽  
Yukiko Fujii ◽  
Manal A. M. Mahmoud ◽  
...  
Keyword(s):  
Breast Milk ◽  
High Sensitivity ◽  
Minimum Detectable Activity ◽  
Activity Level ◽  
Internal Exposure ◽  
Dietary Intakes ◽  
Detectable Activity ◽  
Nuclear Disaster ◽  
Exposure Limit ◽  
Fukushima Nuclear Disaster

The aim of this study was to estimate radionuclide levels in breast milk and the transferred dose to their infants in Sendai (100 km from Fukushima), Japan after the 2011 Fukushima nuclear disaster. Radionuclide concentrations were analyzed in 101 specimens of breast milk collected in 2012. Median values for minimum detectable activities were 0.39, 0.34, 1.1, 1.89, and 17.1 Bq/kg for 137Cs, 134Cs, 131I, 110mAg, and 40K, respectively. Only radionuclides from 40K were detected. To estimate potential exposure and radiocesium dose, we assumed that the samples contained each minimum detectable activity level. The mean minimum detectable activity concentrations (standard deviation) of 137Cs and 134Cs were 0.42 (0.15) and 0.37 (0.14) Bq/kg, respectively. Means of estimated dietary intakes of 137Cs and 134Cs among infants were 0.35 (0.12) and 0.31 (0.11) Bq/day, respectively. The committed effective doses of radiocesium in infants aged 3 and 12 months via breastmilk were estimated at 5.6 (2.1) and 3.3 (1.2) μSv/year, respectively. Dietary intakes of 137Cs and 134Cs in breastfeeding mothers were back-calculated at 1.9 (0.71) and 1.7 (0.65) Bq/day, respectively. The study verified no discernible exposure to radionuclides among infants. The most conservative estimates were below the Japanese internal exposure limit of 1 mSv/year.

scholarly journals High speed multi-channel data acquisition technique for efficient hardware utilization using quad data rate approach

2018 ◽  
Vol 7 (4) ◽  
pp. 2569
Author(s):  
Priyanka Chauhan ◽  
Dippal Israni ◽  
Karan Jasani ◽  
Ashwin Makwana
Keyword(s):  
Power Consumption ◽  
Data Acquisition ◽  
Resource Utilization ◽  
Field Programmable Gate Array ◽  
High Speed ◽  
State Of The Art ◽  
Data Rate ◽  
Field Programmable ◽  
Sensor Signals ◽  
Acquisition Technique

Data acquisition is the most demanding application for the acquisition and monitoring of various sensor signals. The data received are processed in real-time environment. This paper proposes a novel Data Acquisition (DAQ) technique for better resource utilization with less power consumption. Present work has designed and compared advanced Quad Data Rate (QDR) technique with traditional Dual Data Rate (DDR) technique in terms of resource utilization and power consumption of Field Programmable Gate Array (FPGA) hardware. Xilinx ISE is used to verify results of FPGA resource utilization by QDR with state of the art DDR approach. The paper ratiocinates that QDR technique outperforms traditional DDR technique in terms of FPGA resource utilization.  

scholarly journals Effect of Community Reception to Sustainable Ecotourism Development

2018 ◽  
Vol 1 (1) ◽  
pp. 258
Author(s):  
Ainur Rochmaniah
Keyword(s):  
Data Analysis ◽  
Linear Regression ◽  
Data Acquisition ◽  
Significant Influence ◽  
Simple Linear Regression ◽  
Tourism Destination ◽  
District Government ◽  
The Government ◽  
Marine Ecotourism ◽  
Acquisition Technique

Tourism has been an icon of countless regions in Indonesia since the founding of "Visit to Indonesia" in 2009 by the Government. All efforts were made by stakeholders (Government, managers of tourism destination, hotels and surrounding communities) in order to increase the visit of local tourist (Wiscal), archipelagic tourist (Wisnu) and foreign tourists (Wisman), one of the method is by implementing Saptapesona. The goal of this research is to distinguish the influence of reception of society of Sidoarjo toward marine ecotourism development through the implementation of Saptapesona. The type of this study is quantitative with data acquisition technique through observation and questionnaire, distributed to tourism managers, village and district government staff, and tourists in three different locations namely Sedati, Candi, and Jabon respectively for about 144 respondents. The data analysis was using simple linear regression. The results showed that there was a significant influence of community receptions on the development of marine ecotourism.

scholarly journals Minimum Detectable Activity of Pb-210 in Skull From In vivo Measurements: Insights From the Literature

2021 ◽  
Vol 9 ◽  
Author(s):  
Xiangpeng Meng ◽  
Yuanyuan Liu ◽  
Bin Wu ◽  
Jianping Cheng ◽  
Li Wang ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Minimum Detectable Activity ◽  
Active Area ◽  
Semiconductor Detectors ◽  
Background Count ◽  
Radon Exposure ◽  
Detectable Activity ◽  
Retrospective Assessment ◽  
History Of

To address the urgent need for the retrospective assessment of the health conditions of people with a history of appreciable radon exposure, a novel technique that directly measures the characteristic γ-rays emitted from Pb-210 in the living skull was developed. Since the first pioneering study in 1968, this technique has experienced continued advancement over more than half a century, where the limit of detection of Pb-210 is a common criterion to assess the performance of the measuring devices. However, researchers have defined the limit of detection in assorted ways, and the measurement conditions often greatly differ from study to study, both of which significantly challenge interstudy comparisons and obscure how various factors make their impacts. In this work, we reanalyze the reported results in the literature according to the minimum detectable activity (MDA) defined by Currie and investigate the effects of key elements therein. Firstly, we focus on the reported background count rates and analyze their dependence on detector’s energy resolution and active area. Secondly, we turn to the reported calibration factors and conduct analysis in the same manner. Thirdly, we calculate MDA for each study and monitor its dependence on the active area of detector and measurement duration. In the limit of the largest achievable active area (∼75000 mm2), it is found that the asymptotic MDA is approximately 6 (4) Bq and 15 (11) Bq under 30 (60) min measurement using NaI-CsI scintillator and HPGe semiconductor detectors, respectively. Finally, we discuss these asymptotic MDA in the context of estimated Pb-210 activity in the skull resulted from a hypothetical history of radon exposure.

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