Article
Environmental Sciences
K. Chizhov, Yu Bragin, M. K. Sneve, N. Shandala, V Seregin, K. Siegien, G. M. Smith, A. Ksenofontov, A. Kryanev, I Tesnov, Yu Shimansky, G. Goncharenko, V Drozdovitch, V Kryuchkov
Summary: A method based on the solution of the Fredholm equation is developed and applied to reconstruct surface activity density (SAD) maps. The method is used to construct SAD maps for the temporary storage site of spent fuel and radioactive waste, as well as the sheltering construction of solid radioactive waste. The method provides accurate evaluation of the distribution of radioactivity in different areas.
JOURNAL OF RADIOLOGICAL PROTECTION
(2023)
Article
Computer Science, Information Systems
Charalampos G. Arsoniadis, Vassilis C. Nikolaidis
Summary: This article presents a phase-domain based fault location algorithm for unbalanced power distribution systems with distributed generation. Unsynchronized voltage and current measurements are utilized to calculate the equivalent source impedances and the incremental current quantities required. The fault location equations are solved to determine the fault resistance(s), synchronization angles, and possible fault positions. Extensive simulations demonstrate the accuracy of the proposed algorithm in estimating fault distance.
IEEE SYSTEMS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Christos A. Apostolopoulos, Charalampos G. Arsoniadis, Pavlos S. Georgilakis, Vassilis C. Nikolaidis
Summary: This paper introduces a fault location algorithm for unbalanced power distribution systems with distributed generation, which accurately estimates the fault position and related parameters and identifies the most possible fault location candidate among multiple choices.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Nuclear Science & Technology
G. A. T. Duller, H. M. Roberts, M. S. Chapot
Summary: Single aliquot methods are used to determine multiple estimates of the equivalent dose (De) for a sample. The scatter in De values within a sample has been previously used to make inferences about the resetting of the luminescence signal, post-depositional processes, and spatial variations in environmental dose rate. This study reveals variation in beta dose rate between different sample positions on the Riso TL/OSL instruments due to misalignment of the carousel used to hold samples. The severity of this problem for individual instruments is assessed, and a procedure for correcting for the effect is described.
RADIATION MEASUREMENTS
(2023)
Article
Environmental Sciences
Alex Malins, Naohiro Imamura, Tadafumi Niizato, Junko Takahashi, Minsik Kim, Kazuyuki Sakuma, Yoshiki Shinomiya, Satoru Miura, Masahiko Machida
Summary: Understanding the distribution of Cs-134 and Cs-137 in forests is crucial for researching radiation levels in forests affected by the Fukushima Dai-ichi Nuclear Power Plant accident. The main contributors to calculated ambient dose equivalent rates were found to be Cs-134 and Cs-137 in the organic layer and the top 5 cm of forest soil. Uncertainties in the simulation results were mainly due to the accuracy of Cs-134 and Cs-137 activities in the soil layers and their vertical distribution.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2021)
Article
Engineering, Electrical & Electronic
Amin Saadat, Rahmat-Allah Hooshmand, Arash Kiyoumarsi, Mahdi Tadayon
Summary: Power quality disturbances can cause damages to the electrical network's customers. In this article, a new method based on voltage and current measurement data is proposed to locate a voltage sag source using cosine similarity (CS). Simulation results confirm the performance of the proposed method in voltage sag source locating.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Chemistry, Analytical
Seyed Mohsen, Mortazavi Shahroudi, Reza Pourimani
Summary: In this study, the specific activity of radionuclides in sediments from the Gaz River and Gorgan Bay was measured using a high purity germanium detector. The distribution pattern of radiological parameters and hazard indicators was plotted using Surfer and GIS software. The results showed that the highest concentration of K-40 was found in the sediments of the Gaz River outlet, possibly due to the use of potassium fertilizers. The concentration of Cs-137 activity in the Bay sediment was higher than in other sediments, attributed to its high mobility and lightness. The maximum radiological parameters were observed in the estuary of the Gaz River in Gorgan Bay, with the highest levels tending towards the northwest. The mean radiological indices were within the allowable range and did not pose a threat to the health of residents.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Environmental Sciences
Zhibo Zhang, Enyuan Wang, Xianan Liu, Majid Khan, Miao He, Yinghua Zhang
Summary: The accuracy of source location in acoustic monitoring is crucial for monitoring the stability of complex rock mass environments. Traditional methods using equivalent velocity may result in relatively large errors in complex rock mass environments. A new source location method based on Dijkstra's algorithm (SLMD) is proposed, which shows significantly higher accuracy than traditional methods, as demonstrated in laboratory experiments.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Chemistry, Physical
Malwina Jaszczak, Elzbieta Sasiadek-Andrzejczak, Marek Kozicki
Summary: This study reports on a new TBO-Pluronic F-127 three-dimensional (3D) gel dosimeter for measuring UV light dose distribution. The results indicate that the dosimeter has good dose-response characteristics and can be used to measure UV dose distribution.
Article
Chemistry, Physical
Ibrahim Ait Ouaggou, Dikra Bakari, Abdeslem Rrhioua, Mustapha Zerfaoui, Yassine Oulhouq, Mohamed Talbi, Mounir Benmessaoud
Summary: The present study assessed the parameters influencing the creation and distribution of photoneutrons around Elekta Synergy medical linear accelerator. Investigations were conducted on field size and photon energy. The evaluation of intra and extra fractions of created neutrons was achieved by studying the first parameter. The main source of neutron dose was found to be the components of the linac head. The study also confirmed the dependency of neutron production on photon energy, with a significant difference observed between photon energies of 15 MV and 6 MV. The risk related to photoneutrons was evaluated in order to implement the optimization principle of radiation protection.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Engineering, Multidisciplinary
H. Wachta, K. Tereszkiewicz, L. Kulig
Summary: The study showed that the luminance measurement method is a reliable experimental tool for assessing intramuscular fat content, with results consistent with the Soxhlet chemical method.
Article
Thermodynamics
Zhi-Ke Liu, Han-Ling Li, Bing-Yang Cao
Summary: This paper develops a topology optimization scheme to optimize the heat source distribution, achieving better designs with higher cooling performance and lower computational cost. The performance of different heat source distributions is evaluated using an equivalent distance function, revealing that reducing the equivalent distance between the heat source and the heat sink is an effective way to enhance heat transport.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Environmental Sciences
Thanh-Nam Nguyen, Thanh-Duong Nguyen, Van-Hao Duong, Tai-Tue Nguyen
Summary: The study found that marine species with lower trophic levels have higher Po-210 concentrations, and omnivorous species have Po-210 concentrations approximately 2.9 times higher than carnivorous species. Species living in the demersal zone accumulated high levels of Po-210 compared to species in reef-associated and pelagic-neritic zones. Consuming seafood from the demersal zone and bivalve species in the area can result in a significantly high annual committed effective dose of Po-210.
MARINE POLLUTION BULLETIN
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Noriaki Miyaji, Kenta Miwa, Takashi Iimori, Kei Wagatsuma, Hiroyuki Tsushima, Noriyo Yokotsuka, Taisuke Murata, Tetsuharu Kasahara, Takashi Terauchi
Summary: This study aimed to determine the optimal dosimeter and method for measuring the amount of radiation exposure to the eye lens of nuclear medicine staff. The results showed that eye lens dosimeters providing a 3-mm dose equivalent near the eye would be a more reliable means of assessing radiation doses in the mixed radiation environment of nuclear medicine.
JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Zhelin Liu, Peng Li, Chengshan Wang, Hao Yu, Haoran Ji, Wei Xi, Jianzhong Wu
Summary: This paper proposes a second-order cone programming (SOCP) based robust state estimation (RSE) method considering multi-source measurements in active distribution networks (ADNs) with distributed generators (DGs). The method converts the phase angle measurements of distribution phasor measurement units (D-PMUs) to equivalent power measurements and utilizes weighted least absolute value estimator and multi-time slots of D-PMU measurements to improve convergence, bad data identification, and estimation accuracy.
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY
(2023)
