2021 연구성과 (63 / 281)

※ 컨트롤 + 클릭으로 열별 다중 정렬 가능합니다.
Excel 다운로드
WoS SCOPUS Document Type Document Title Abstract Authors Affiliation ResearcherID (WoS) AuthorsID (SCOPUS) Author Email(s) Journal Name JCR Abbreviation ISSN eISSN Volume Issue WoS Edition WoS Category JCR Year IF JCR (%) FWCI ⓘ FWCI Update Date WoS Citation SCOPUS Citation Keywords (WoS) KeywordsPlus (WoS) Keywords (SCOPUS) KeywordsPlus (SCOPUS) Language Publication Stage Publication Year Publication Date DOI JCR Link DOI Link WOS Link SCOPUS Link
○ ○ Review ⓘ Recent Progress in Polymorphs of Carbon Nitride: Synthesis, Properties, and Their Applications ⓘ Carbon nitride (CN) materials are at the forefront of contemporary solar energy conversion applications, owing to their extraordinary physicochemical properties. Having such multifunctional properties, CN photocatalytic materials are practically significant; however, due to the indistinguishable physical properties, all solid CN materials in most literature reports are referred to as graphitic C3N4 phase, which is incorrect. This perspective discourses the various identified polymeric forms of CN, their molecular structure, synthesis, photophysical properties, and their applications. The article attempts to simplify the conjectures in CN terminology and discuss future perspectives, challenges, and opportunities in the developing field of CN chemistry. ⓘ Vidyasagar, Devthade; Bhoyar, Toshali; Singh, Gurwinder; Vinu, Ajayan ⓘ Kyungpook Natl Univ, Mat Sci & Engn Dept, Daegu 41566, South Korea; Visvesvaraya Natl Inst Technol VNIT, Dept Chem, Mat & Catalysis Lab, Nagpur 440010, Maharashtra, India; Univ Newcastle, Fac Engn & Build Environm, Global Innovat Ctr Adv Nanomat, Sch Engn, Callaghan, NSW 2308, Australia ⓘ Singh, Gurwinder/E-1406-2018; Vidyasagar, Devthade/O-3930-2015; Vinu, Ajayan/ADE-9111-2022; Singh, Gurwinder/S-9647-2019; Bhoyar, Toshali/AAW-5211-2020 ⓘ 57201674442; 57211356285; 57208193925; 6603916006 ⓘ vidyasagar.devtade@knu.ac.kr;Ajayan.Vinu@newcastle.edu.au; ⓘ MACROMOLECULAR RAPID COMMUNICATIONS ⓘ MACROMOL RAPID COMM ⓘ 1022-1336 1521-3927 42 7 SCIE POLYMER SCIENCE ⓘ 2021 5.006 16.1 2.1 2025-07-30 ⓘ 33 31 carbon nitride; g-C3N4; graphitic carbon nitride; polymorphs ⓘ ⓘ carbon nitride; g-C <sub>3</sub>N <sub>4</sub>; graphitic carbon nitride; polymorphs ⓘ Catalysis; Graphite; Nitriles; Polymers; Carbon nitride; Energy conversion; Physicochemical properties; Solar energy; cyanogen; graphite; nitrile; polymer; Future perspectives; Multifunctional properties; Photocatalytic materials; Photophysical properties; Recent progress; catalysis; Photocatalytic activity ⓘ English 2021 2021-04 10.1002/marc.202000676 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Vitamin D Status and Factors Associated with Vitamin D Deficiency during the First Year of Life in Preterm Infants ⓘ We aimed to investigate the changes in vitamin D levels and factors associated with vitamin D deficiency (VDD) during the first year of life in Korean preterm infants. We enrolled 333 preterm infants who were born at Kyungpook National University Children's Hospital between March 2013 and December 2019. 25-hydroxyvitamin D (25-OHD) levels and medical records were collected at birth, 6 months, and 12 months of age. The mean gestational age was 33.4 +/- 2.3 weeks and mean 25-OHD levels at birth were 18.2 +/- 13.5 ng/mL. The incidence of VDD was 82.8%, 30.6%, and 27.0% at birth, 6 months, and 12 months, respectively. The incidence of severe VDD (25-OHD < 10 ng/mL) was 31.5%, 1.5%, and 0%, at birth, 6 months, and 12 months, respectively. Among infants with severe VDD, the deficiency persisted in 49.6% at 6 months, and 35.3% at 12 months. The strongest predictor of VDD during follow-up was 25-OHD concentration at birth. Vitamin D supplementation at 400 IU/day did not affect vitamin D levels during the first year of life. Therefore, it is important to prevent neonatal VDD through maternal vitamin D supplementation during pregnancy. Further research is needed to determine the optimal vitamin D supplementation dose for Korean preterm infants. ⓘ Jung, Jae-Hun; Kim, Eun-Ah; Lee, Sang-Yoon; Moon, Jung-Eun; Lee, Eun-Joo; Park, Sook-Hyun ⓘ Kyungpook Natl Univ, Sch Med, Dept Pediat, Daegu 41404, South Korea; Kyungpook Natl Univ, Chilgok Hosp, Pediat, Daegu 41404, South Korea ⓘ Lee, Joo Yong/ADE-2110-2022; JUNG, JAEHUN/KHE-5939-2024 ⓘ 57214886196; 57224398760; 57224403293; 57205770947; 58950707700; 57194595004 ⓘ wogns7602@gmail.com;dmsk0328@naver.com;gguggusy@gmail.com;subuya@hanmail.net;pshmom00@gmail.com;park_sh@knu.ac.kr; ⓘ NUTRIENTS ⓘ NUTRIENTS ⓘ 2072-6643 13 6 SCIE NUTRITION & DIETETICS ⓘ 2021 6.706 16.1 0.64 2025-07-30 ⓘ 6 11 vitamin D deficiency; preterm infants; Korea ⓘ HIGH PREVALENCE; RISK; CHILDREN; RICKETS; WOMEN ⓘ Korea; Preterm infants; Vitamin D deficiency ⓘ Female; Gestational Age; Humans; Incidence; Infant; Infant, Newborn; Infant, Premature; Infant, Premature, Diseases; Male; Risk Factors; Vitamin D; Vitamin D Deficiency; Vitamins; vitamin D; vitamin D derivative; 25-hydroxyvitamin D; vitamin; vitamin D; Article; controlled study; disease severity; female; follow up; gestational age; human; incidence; infant; major clinical study; male; medical record; pediatric patient; prematurity; prevention; radioimmunoassay; retrospective study; vitamin blood level; vitamin D deficiency; vitamin supplementation; blood; newborn; prematurity; risk factor; vitamin D deficiency ⓘ English 2021 2021-06 10.3390/nu13062019 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ 4G-VOS: Video Object Segmentation using guided context embedding ⓘ Video Object Segmentation (VOS) is a fundamental task required in many high-level real-world computer vision applications. VOS becomes challenging due to the presence of background distractors as well as to object appearance variations. Many existing VOS approaches use online model updates to capture the appearance variations which incurs high computational cost. Template matching and propagation-based VOS methods, although cost-effective, suffer from performance degradation under challenging scenarios such as occlusion and background clutter. In order to tackle these challenges, we propose a network architecture dubbed 4G-VOS to encode video context for improved VOS performance to tackle these challenges. To preserve long term semantic information, we propose a guided transfer embedding module. We employ a global instance matching module to generate similarity maps from the initial image and the mask. Besides, we use a generative directional appearance module to estimate and dynamically update the foreground/background class probabilities in a spherical embedding space. Moreover, during feature refinement, existing approaches may lose contextual information. Therefore, we propose a guided pooled decoder to exploit the global and local contextual information during feature refinement. The proposed framework is an end-to-end learning architecture that is trained in an offline fashion. Evaluations over three VOS benchmark datasets including DAVIS2016, DAVIS2017, and YouTube-VOS have demonstrated outstanding performance of the proposed algorithm compared to 40 existing state-of-the-art methods. (C) 2021 Elsevier B.V. All rights reserved. ⓘ Fiaz, Mustansar; Zaheer, Muhammad Zaigham; Mahmood, Arif; Lee, Seung-Ik; Jung, Soon Ki ⓘ Mohamed Bin Zayed Univ Artificial Intelligence, Comp Vis Dept, Abu Dhabi, U Arab Emirates; Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu, South Korea; Univ Sci & Technol, Daejeon, South Korea; Elect & Telecommunicat Res Inst, Daejeon, South Korea; Informat Technol Univ, Dept Comp Sci, Lahore, Pakistan ⓘ ; Lee, Jae/J-5597-2012; Mahmood, Arif/R-7949-2019; Jung, Soon Ki/P-7687-2018; Zaheer, Muhammad/HTN-7945-2023 ⓘ 57208735843; 57213478125; 55636036300; 23091583800; 57226791905 ⓘ skjung@knu.ac.kr; ⓘ KNOWLEDGE-BASED SYSTEMS ⓘ KNOWL-BASED SYST ⓘ 0950-7051 1872-7409 231 SCIE COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE ⓘ 2021 8.139 16.2 0.33 2025-07-30 ⓘ 6 7 Video Object Segmentation; Feature transfer and matching; Spherical embedding; Feature refinement; Channel convolutional neural networks; Encoder-decoder ⓘ SEMANTIC SEGMENTATION; RECOGNITION ⓘ Channel convolutional neural networks; Encoder–decoder; Feature refinement; Feature transfer and matching; Spherical embedding; Video Object Segmentation ⓘ Backpropagation; Benchmarking; Convolutional neural networks; Cost effectiveness; Decoding; Embeddings; Image segmentation; Network architecture; Semantics; Template matching; Channel convolutional neural network; Computer vision applications; Embeddings; Encoder-decoder; Feature refinement; Feature transfers; Features matching; Real-world; Spherical embedding; Video objects segmentations; Motion compensation ⓘ English 2021 2021-11-14 10.1016/j.knosys.2021.107401 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ A Real-Time Abnormal Beat Detection Method Using a Template Cluster for the ECG Diagnosis of IoT Devices ⓘ Currently, the use of the Internet of Things (IoT) devices is expanding, and research on bio-signal monitoring systems is increasing. This paper proposes an abnormal beat detection algorithm for electrocardiogram signals that is suitable for embedded devices. A typical single template-based detection method requires a great deal of memory to generate a template, and abnormal beats make it difficult to generate a normal beat template. As such, this paper proposes a reliable method of generating a normal beat template using a template cluster with Pearson similarity. The proposed method uses the weighted mean to minimize memory usage in the template cluster generation step. The results of the experiment indicate that the proposed algorithm can measure P-wave deformation shapes, which are difficult to detect, using the partial template in the P-wave region.Furthermore, the average detection time is 0.39 seconds for a 30-minute signal, confirming the algorithm's potential for real-time operation in lightweight embedded devices. ⓘ Lee, Seungmin; Park, Daejin ⓘ Kyungpook Natl Univ, Adv Dent Device Dev Inst, Daegu, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu, South Korea ⓘ ⓘ 57200005388; 55463943600 ⓘ boltanut@knu.ac.kr; ⓘ HUMAN-CENTRIC COMPUTING AND INFORMATION SCIENCES ⓘ HUM-CENT COMPUT INFO ⓘ 2192-1962 11 SCIE COMPUTER SCIENCE, INFORMATION SYSTEMS ⓘ 2021 6.558 16.2 0.93 2025-07-30 ⓘ 12 12 ECG; Template; Abnormal Beat Detection; PVC; PJC; Embedded System ⓘ QRS; EXTRACTION; TRANSFORM; SYSTEMS ⓘ Abnormal beat detection; Ecg; Embedded system; Pjc; Pvc; Template ⓘ Clustering algorithms; Embedded systems; Internet of things; Seismic waves; Abnormal beat detection; Beat detection; Detection methods; Embedded device; Embedded-system; P waves; Pjc; Pvc; Real- time; Template; Electrocardiography ⓘ English 2021 2021-01-29 10.22967/hcis.2021.11.004 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Adaptive ECGSignal Compression Method Based on Look-Ahead Linear Approximation for Ultra Long-Term Operating of Healthcare IoT Devices ⓘ Signal compression is an important study in the electrocardiogram (ECG) signal analysissince ECG signals require a long time measurement. Linear approximation shows a high signal compression rate, and is efficient in detecting ambiguous fiducial points. Existing research improved the execution time to enable real-time linear approximation, but the existing algorithm selected the number of vertices arbitrarily. Thus, the existing linear approximation does not guarantee that the conditions of compression ratio (CR) or reconstruction errormeasured by percentage root-mean-square difference (PRD) will be satisfied. In this study, we improve the algorithm to enable a linear approximation based onthespecified CR or PRD. We propose a quantitative approach to determinethe optimal number of vertices that satisfiesthe specified CR through inverse computation. Additionally, we extend the cost matrix in advance and select the optimal number of vertices in a look-ahead method, thereby performing signal compression according to the PRD. From experimental results, we confirmed an average PRD of 0.78% in the given CR of 10:1, and an average CR of 12.7:1 in the given PRD of 2%. ⓘ Lee, Seungmin; Park, Daejin ⓘ Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu, South Korea ⓘ ⓘ 57200005388; 55463943600 ⓘ boltanut@knu.ac.kr; ⓘ HUMAN-CENTRIC COMPUTING AND INFORMATION SCIENCES ⓘ HUM-CENT COMPUT INFO ⓘ 2192-1962 11 SCIE COMPUTER SCIENCE, INFORMATION SYSTEMS ⓘ 2021 6.558 16.2 0.62 2025-07-30 ⓘ 6 9 ECG; Signal Compression; Linear Approximation; Signal Reconstruction; Compression Ratio; Percentage; Root-Mean-Square Difference ⓘ ECG; ALGORITHM; WAVELET ⓘ Compression ratio; Ecg; Linear approximation; Percentage root-mean-square difference; Signal compression; Signal reconstruction ⓘ Biomedical signal processing; Internet of things; Signal reconstruction; Compression methods; Compression ratio; Electrocardiogram signal; Linear approximations; Long time measurements; Optimal number; Percentage root-mean-square differences; Signal compression; Signals analysis; Signals reconstruction; Electrocardiography ⓘ English 2021 2021-07-30 10.22967/hcis.2021.11.030 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Content-Based Image Retrieval Using a Combination of Texture and Color Features ⓘ Image retrieval is headed towards the ultimate goal of achieving the performance very similar to human cognitive ability. As an attempt of such work, this paper proposes a content-based image retrieval using a combination of texture features extracted from Gabor local correlation and uniform magnitude local binary pattern in value component and color features from color autocorrelogram in hue and saturation components. The texture features have multi-resolution multi-direction characteristics. In contrast, the color features have spatial structural information for color, which is rotation-invariant. Further, the HSV color space used herein is similar to the human visual system. Especially, two-dimensional (2D) Gabor transform used to extract parts of texture features, mimics the biological visual strategy of embedding angular and spectral analysis within global spatial coordinates, as using empirical 2D receptive field profiles obtained from orientation-selective neurons in cat visual cortex as the weighting functions. Based on the experimental results, we confirm that the proposed combined method outperforms compared existing methods and the methods using partial ones stemming from the proposed features in terms of retrieval performance. ⓘ Bu, Hee-Hyung; Kim, Nam-Chul; Kim, Sung-Ho ⓘ Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu, South Korea ⓘ ⓘ 57194698542; 36068144500; 57194701745 ⓘ nckim@knu.ac.kr; ⓘ HUMAN-CENTRIC COMPUTING AND INFORMATION SCIENCES ⓘ HUM-CENT COMPUT INFO ⓘ 2192-1962 11 SCIE COMPUTER SCIENCE, INFORMATION SYSTEMS ⓘ 2021 6.558 16.2 0.54 2025-07-30 ⓘ 8 8 Content-Based Image Retrieval; Gabor Local Correlation; Uniform Magnitude Local Binary Pattern; Color Autocorrelogram; HSV Color Space ⓘ ROTATION-INVARIANT; SCALE ⓘ Color autocorrelogram; Content-based image retrieval; Gabor local correlation; Hsv color space; Uniform magnitude local binary pattern ⓘ Color; Image texture; Spectrum analysis; Textures; Color autocorrelogram; Color features; Content-Based Image Retrieval; Contents-based image retrievals; Gabor local correlation; HSV color spaces; Local binary patterns; Local correlations; Texture features; Uniform magnitude local binary pattern; Content based retrieval ⓘ English 2021 2021-05-30 10.22967/hcis.2021.11.023 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Debris transport visualization to analyze the flow characteristics in reactor vessel for nuclear power plants ⓘ During the long-term cooling (LTC) phase of a loss-of-coolant accident (LOCA) in a pressurized water reactor (PWR), water is supplied from the containment sump to the reactor coolant system (RCS) by the flooded sump water to the Reactor Vessel (RV) through the broken pipes. As part of the technical efforts for resolving GSI-191 [( Reid and Crytzer, May. 2007) 1, consideration is needed for the consequences of debris penetrating the sump screen and propagating downstream into the RV. Injection of debris (fiberglass) into the RV during the LTC recirculation phase needs special attention to assure that reactor core cooling is maintained. The point of concern is the potential for debris to adversely affect the reactor core flow paths or heat transfer [2]. However, all the experiments for proving the coolability of RV have been done with the assumption of the most of debris would be transferred to the RV and the bottom nozzle of the FAs. The purpose of the tests is to quantify the amount of the debris that would be accumulated at the lower plenum and the debris that passes through the FAs since non-conservatism of other researches assumptions that have been used in the past experimental or analytical programs. (c) 2021 Korean Nuclear Society, Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). ⓘ Song, Yong Jae; Lim, Dong Seok; Heo, Min Beom; Kim, Beom Kyu; Lee, Doo Yong; Jo, Daeseong ⓘ FNC Technol Co Ltd, 44 Tapsil Ro, Yongin, Gyeonggi Do, South Korea; Kyungpook Natl Univ, Sch Mech Engn, 80 Daehak Ro, Daegu 702701, South Korea ⓘ Kim, Kyunghoon/AGO-0079-2022 ⓘ 57203764343; 57226295052; 57226295231; 57226290234; 56257791000; 16424303000 ⓘ yjsong0408@hanmail.net; ⓘ NUCLEAR ENGINEERING AND TECHNOLOGY ⓘ NUCL ENG TECHNOL ⓘ 1738-5733 53 12 SCIE NUCLEAR SCIENCE & TECHNOLOGY ⓘ 2021 2.817 16.2 0.02 2025-07-30 ⓘ 1 1 Debris; GSI-191; Licensing issue; Nuclear power plants; Insulation; Fiberglass ⓘ ⓘ Debris; Fiberglass; GSI-191; Insulation; Licensing issue; Nuclear power plants ⓘ ⓘ English 2021 2021-12 10.1016/j.net.2021.07.003 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Design optimization of GaN diode with p-GaN multi-well structure for high-efficiency betavoltaic cell ⓘ In this work, we propose and design a GaN-based diode with a p-doped GaN (p-GaN) multi-well structure for high efficiency betavoltaic (BV) cells. The short-circuit current density (J(SC)) and open circuit voltage (V-OC) of the devices were investigated with variations of parameters such as the doping concentration, height, width of the p-GaN well region, well-to-well gap, and number of well regions. The J(SC) of the device was significantly improved by a wider depletion area, which was obtained by applying the multi-well structure. The optimized device achieved a higher output power density by 8.6% than that of the conventional diode due to the enhancement of J(SC). The proposed device structure showed a high potential for a high efficiency BV cell candidate. (C) 2020 Korean Nuclear Society, Published by Elsevier Korea LLC. ⓘ Yoon, Young Jun; Lee, Jae Sang; Kang, In Man; Lee, Jung-Hee; Kim, Dong-Seok ⓘ Korea Atom Energy Res Inst, Korea Multipurpose Accelerator Complex, Gyeogju 38180, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea ⓘ ⓘ 57218864885; 7601467686; 7203062678; 57196140713; 55642581500 ⓘ dongseokkim@kaeri.re.kr; ⓘ NUCLEAR ENGINEERING AND TECHNOLOGY ⓘ NUCL ENG TECHNOL ⓘ 1738-5733 53 4 SCIE NUCLEAR SCIENCE & TECHNOLOGY ⓘ 2021 2.817 16.2 0.31 2025-07-30 ⓘ 4 4 GaN; Betavoltaic cell; Multi-well structure; High-efficiency; TCAD simulation ⓘ ⓘ Betavoltaic cell; GaN; High-efficiency; Multi-well structure; TCAD simulation ⓘ ⓘ English 2021 2021-04 10.1016/j.net.2020.09.014 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Dynamic characteristics of single door electrical cabinet under rocking: Source reconciliation of experimental and numerical findings ⓘ Seismic qualifications of electrical equipment, such as cabinet systems, have been emerging as the key area of nuclear power plants in Korea since the 2016 Gyeongju earthquake, including the high-frequency domain. In addition, electrical equipment was sensitive to the high-frequency ground motions during the past earthquake. Therefore, this paper presents the rocking behavior of the electrical cabinet system subjected to Reg. 1.60 and UHS. The high fidelity finite element (FE) model of the cabinet related to the shaking table test data was developed. In particular, the first two global modes of the cabinet from the experimental test were 16 Hz and 24 Hz, respectively. In addition, 30.05 Hz and 37.5 Hz were determined to be the first two local modes in the cabinet. The high fidelity FE model of the cabinet using the ABAQUS platform was extremely reconciled with shaking table tests. As a result, the dynamic properties of the cabinet were sensitive to electrical instruments, such as relays and switchboards, during the shaking table test. In addition, the amplification with respect to the vibration transfer function of the cabinet was observed on the third floor in the cabinet due to localized impact corresponding to the rocking phenomenon of the cabinet under Reg.1.60 and UHS. Overall, the rocking of the cabinet system can be caused by the low-frequency oscillations and higher peak horizontal acceleration. (c) 2021 Korean Nuclear Society, Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). ⓘ Jeon, Bub-Gyu; Son, Ho-Young; Eem, Seung-Hyun; Choi, In-Kil; Ju, Bu-Seog ⓘ Pusan Natl Univ, KOCED Seism Simulat Test Ctr, 49 Busandaehak Ro, Yangsan Icyungnam 50612, South Korea; Kyung Hee Univ, Dept Civil Engn, Yongin 17104, Gyeonggi Do, South Korea; Kyungpook Natl Univ, Dept Convers & Fus Syst Engn, Major Plant Syst Engn, Seoul, South Korea; Korea Atom Energy Res Inst, Smart Struct Safety & Prognosis Res Div, Daejeon, South Korea ⓘ Eem, Seunghyun/E-9710-2015 ⓘ 54961482000; 57201250433; 52363442900; 36118722100; 55652548900 ⓘ bju2@khu.ac.kr; ⓘ NUCLEAR ENGINEERING AND TECHNOLOGY ⓘ NUCL ENG TECHNOL ⓘ 1738-5733 53 7 SCIE NUCLEAR SCIENCE & TECHNOLOGY ⓘ 2021 2.817 16.2 1.32 2025-07-30 ⓘ 16 17 Cabinet; Seismic qualification; High fidelity; Rocking behavior ⓘ RESPONSE SPECTRA; STATE ⓘ Cabinet; High fidelity; Rocking behavior; Seismic qualification ⓘ ⓘ English 2021 2021-07 10.1016/j.net.2021.01.003 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Evaluation of MCC seismic response according to the frequency contents through the shake table test ⓘ Damage to nuclear power plants causes human casualties and environmental disasters. There are electrical facilities that control safety-related devices in nuclear power plants, and seismic performance is required for them. The 2016 Gyeongju earthquake had many high-frequency components. Therefore, there is a high possibility that an earthquake involving many high frequency components will occur in South Korea. As such, it is necessary to examine the safety of nuclear power plants against an earthquake with many high-frequency components. In this study, the shaking table test of electrical facilities was conducted against the design earthquake for nuclear power plants with a large low-frequency components and an earthquake with a large high-frequency components. The response characteristics of the earthquake with a large high-frequency components were identified by deriving the amplification factors of the response through the shaking table test. In addition, safety of electrical facility against the two aforementioned types of earthquakes with different seismic characteristics was confirmed through limitstate seismic tests. The electrical facility that was performed to the shaking table test in this study was a motor control center (MCC). ? 2020 Korean Nuclear Society, Published by Elsevier Korea LLC. All rights reserved. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). ⓘ Chang, Sung-Jin; Jeong, Young-Soo; Eem, Seung-Hyun; Choi, In-Kil; Park, Dong-Uk ⓘ Korea Construct & Transport Engn Dev Collaborator, Busandaehak Ro 49, Yangsan 50612, Kyungnam, South Korea; Kyungpook Natl Univ, Dept Convers & Fus Syst Engn, 2559 Gyeongsang Daero, Sangju 37224, Gyeongsang Bukd, South Korea; Korea Atom Energy Res Inst, 989-111,Daeduk Daero, Daejeon 34057, South Korea ⓘ Eem, Seunghyun/E-9710-2015 ⓘ 55494267900; 59860142600; 52363442900; 36118722100; 56082144000 ⓘ kwenry@pusan.ac.kr; ⓘ NUCLEAR ENGINEERING AND TECHNOLOGY ⓘ NUCL ENG TECHNOL ⓘ 1738-5733 53 4 SCIE NUCLEAR SCIENCE & TECHNOLOGY ⓘ 2021 2.817 16.2 1.42 2025-07-30 ⓘ 20 20 Shake table test; Natural frequency; Seismic fragility test; Uniform hazard spectra; Design spectrum ⓘ ⓘ Design spectrum; Natural frequency; Seismic fragility test; Shake table test; Uniform hazard spectra ⓘ ⓘ English 2021 2021-04 10.1016/j.net.2020.10.002 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Impact of boundary layer simulation on predicting radioactive pollutant dispersion: A case study for HANARO research reactor using the WRF-MMIF-CALPUFF modeling system ⓘ Wind plays an important role in cases of unexpected radioactive pollutant dispersion, deciding distribution and concentration of the leaked substance. The accurate prediction of wind has been challenging in numerical weather prediction models, especially near the surface because of the complex interaction between turbulent flow and topographic effect. In this study, we investigated the characteristics of atmospheric dispersion of radioactive material (i.e. Cs-137) according to the simulated boundary layer around the HANARO research nuclear reactor in Korea using the Weather Research and Forecasting (WRF)-Mesoscale Model Interface (MMIF)-California Puff (CALPUFF) model system. We examined the impacts of orographic drag on wind field, stability calculation methods, and planetary boundary layer parameterizations on the dispersion of radioactive material under a radioactive leaking scenario. We found that inclusion of the orographic drag effect in the WRF model improved the wind prediction most significantly over the complex terrain area, leading the model system to estimate the radioactive concentration near the reactor more conservatively. We also emphasized the importance of the stability calculation method and employing the skillful boundary layer parameterization to ensure more accurate low atmospheric conditions, in order to simulate more feasible spatial distribution of the radioactive dispersion in leaking scenarios. (c) 2020 Korean Nuclear Society, Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). ⓘ Lim, Kyo-Sun Sunny; Lim, Jong-Myung; Lee, Jiwoo; Shin, Hyeyum Hailey ⓘ Kyungpook Natl Univ, Sch Earth Syst Sci, 80 Daehak Ro, Daegu 41566, South Korea; Korea Atom Energy Res Inst, Environm Radioact Assessment Team, 111 Daedeok Daero 989, Daejeon 305353, South Korea; Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA; Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA ⓘ Lee, Jiwoo/L-3828-2014; Lim, Kyo-Sun/I-3811-2012 ⓘ 57211926026; 9279156900; 37960996800; 54992767300 ⓘ jwlee@llnl.gov; ⓘ NUCLEAR ENGINEERING AND TECHNOLOGY ⓘ NUCL ENG TECHNOL ⓘ 1738-5733 53 1 SCIE NUCLEAR SCIENCE & TECHNOLOGY ⓘ 2021 2.817 16.2 0.71 2025-07-30 ⓘ 9 8 CALPUFF; Dispersion of radioactive material; WRF; Wind fields; Stability calculation ⓘ SCALE OROGRAPHY PARAMETERIZATION; HEAVY RAINFALL EVENT; ATMOSPHERIC DISPERSION; TOPOGRAPHY MISSION; SHUTTLE RADAR; PART I; KOREA; PRECIPITATION; DIFFUSION; QUALITY ⓘ CALPUFF; Dispersion of radioactive material; Stability calculation; Wind fields; WRF ⓘ ⓘ English 2021 2021-01 10.1016/j.net.2020.06.011 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Methodology of seismic-response-correlation-coef fi cient calculation for seismic probabilistic safety assessment of multi-unit nuclear power plants ⓘ In 2011, an earthquake and subsequent tsunami hit the Fukushima Daiichi Nuclear Power Plant, causing simultaneous accidents in several reactors. This accident shows us that if there are several reactors on site, the seismic risk to multiple units is important to consider, in addition to that to single units in isolation. When a seismic event occurs, a seismic-failure correlation exists between the nuclear power plant's structures, systems, and components (SSCs) due to their seismic-response and seismic-capacity correlations. Therefore, it is necessary to evaluate the multi-unit seismic risk by considering the SSCs' seismic-failure-correlation effect. In this study, a methodology is proposed to obtain the seismic response-correlation coefficient between SSCs to calculate the risk to multi-unit facilities. This coeffi-cient is calculated from a probabilistic multi-unit seismic-response analysis. The seismic-response and seismic-failure-correlation coefficients of the emergency diesel generators installed within the units are successfully derived via the proposed method. In addition, the distribution of the seismic-response correlation coefficient was observed as a function of the distance between SSCs of various dynamic characteristics. It is demonstrated that the proposed methodology can reasonably derive the seismic response-correlation coefficient between SSCs, which is the input data for multi-unit seismic probabilistic safety assessment. (c) 2020 Korean Nuclear Society, Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). ⓘ Eem, Seunghyun; Choi, In-Kil; Yang, Beomjoo; Kwag, Shinyoung ⓘ Kyungpook Natl Univ, Dept Convers & Fus Syst Engn, Major Plant Syst Engn, Daegu, South Korea; Korea Atom Energy Res Inst, Struct Safety & Prognosis Res Div, Daejeon, South Korea; Chungbuk Natl Univ, Sch Civil Engn, Cheongju, South Korea; Hanbat Natl Univ, Dept Civil & Environm Engn, Daejeon, South Korea ⓘ Eem, Seunghyun/KVB-1493-2024 ⓘ 52363442900; 36118722100; 57221775575; 55779491500 ⓘ eemsh@knu.ac.kr;cik@kaeri.re.kr;byang@cbnu.ac.kr;skwag@hanbat.ac.kr; ⓘ NUCLEAR ENGINEERING AND TECHNOLOGY ⓘ NUCL ENG TECHNOL ⓘ 1738-5733 53 3 SCIE NUCLEAR SCIENCE & TECHNOLOGY ⓘ 2021 2.817 16.2 0.92 2025-07-30 ⓘ 13 13 Seismic PSA; Seismic correlation; Incoherence function; Seismic-response analysis; Multi-unit ⓘ SPATIAL VARIATION; RISK-ASSESSMENT; SITES ⓘ Incoherence function; Multi-unit; Seismic correlation; Seismic PSA; Seismic-response analysis ⓘ ⓘ English 2021 2021-03 10.1016/j.net.2020.07.032 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Mitigation of seismic responses of actual nuclear piping by a newly developed tuned mass damper device ⓘ The purpose of this study is to reduce seismic responses of an actual nuclear piping system using a tuned mass damper (TMD) device. A numerical piping model was developed and validated based on shaking table test results with actual nuclear piping. A TMD for nuclear piping was newly devised in this work. A TMD shape design suitable for nuclear piping systems was conducted, and its operating performance was verified after manufacturing. The response reduction performance of the developed TMD under earthquake loading on actual piping was investigated. Results confirmed that, on average, seismic response reduction rates of 34% in the maximum acceleration response, 41% in the root mean square acceleration response, and 57% in the spectral acceleration response were shown through the TMD application. This developed TMD operated successfully within the seismic response reduction rate of existing TMD optimum design values. Therefore, the developed TMD and dynamic interpretation help improve the nuclear piping's seismic performance. (c) 2021 Korean Nuclear Society, Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). ⓘ Kwag, Shinyoung; Eem, Seunghyun; Kwak, Jinsung; Lee, Hwanho; Oh, Jinho; Koo, Gyeong-Hoi ⓘ Hanbat Natl Univ, Dept Civil & Environm Engn, Daejeon 34158, South Korea; Kyungpook Natl Univ, Dept Convers & Fus Syst Engn Major Plant Syst, Sangju, South Korea; Korea Atom Energy Res Inst, 111 Daedeok Daero, Daejeon 34057, South Korea ⓘ Eem, Seunghyun/KVB-1493-2024 ⓘ 55779491500; 52363442900; 57209175827; 57209177158; 7402155334; 7004792342 ⓘ eemsh@knu.ac.kr; ⓘ NUCLEAR ENGINEERING AND TECHNOLOGY ⓘ NUCL ENG TECHNOL ⓘ 1738-5733 53 8 SCIE NUCLEAR SCIENCE & TECHNOLOGY ⓘ 2021 2.817 16.2 2.04 2025-07-30 ⓘ 18 24 Piping; Tuned mass damper (TMD) device; Dynamic absorber; Nuclear power plant; Device design; Device fabrication; Operation test ⓘ FRAGILITY EVALUATION; SYSTEM; PERFORMANCE; PARAMETERS; DESIGN ⓘ Device design; Device fabrication; Dynamic absorber; Nuclear power plant; Operation test; Piping; Tuned mass damper (TMD) device ⓘ ⓘ English 2021 2021-08 10.1016/j.net.2021.02.009 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Neutron spectroscopy using pure LaCl3 crystal and the dependence of pulse shape discrimination on Ce-doped concentrations ⓘ We report a simple technique for direct neutron spectroscopy using pure LaCl3 crystals. Pure LaCl3 crystals exhibit considerably better pulse shape discrimination (PSD) capabilities with relatively good energy resolution as compared with Ce-doped LaCl3 crystals. Single crystals of pure and Ce-doped LaCl3 were grown using an inhouse-developed Bridgman furnace. PSD capabilities of these crystals were investigated using Am-241 and Cs-137 sources. Fast neutron detection was tested using a Cf-252 source and three separate bands corresponding to electron, proton, and alpha were observed. The proton band induced by the Cl-35(n,p)S-35 reaction can be used for direct neutron spectroscopy because proton energy is proportional to incident neutron energy. Owing to good scintillation performance and excellent PSD capabilities, pure LaCl3 is a promising candidate for space detectors and other applications that necessitate gamma/fast neutron discrimination capability. (C) 2021 Korean Nuclear Society, Published by Elsevier Korea LLC. ⓘ Phan Quoc Vuong; Kim, Hongjoo; Nguyen Thanh Luan; Kim, Sunghwan ⓘ Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; Cheongju Univ, Dept Radiol Sci, Cheongju 28503, South Korea ⓘ ; Kim, Hong Joo/AAE-1178-2022; Thanh Duong, Nguyen/AGY-4248-2022 ⓘ 57207618553; 59051568100; 57210576969; 36165569900 ⓘ hongjoo@knu.ac.kr; ⓘ NUCLEAR ENGINEERING AND TECHNOLOGY ⓘ NUCL ENG TECHNOL ⓘ 1738-5733 53 11 SCIE NUCLEAR SCIENCE & TECHNOLOGY ⓘ 2021 2.817 16.2 1.12 2025-07-30 ⓘ 14 15 Neutron spectroscopy; Pure LaCl3 crystal; Pulse shape discrimination; Dual gamma/Neutron detection ⓘ GAMMA-RAY; SCINTILLATION CHARACTERISTICS; TL2ZRCL6; CLYC; CS2LIYCL6 ⓘ Dual gamma/Neutron detection; Neutron spectroscopy; Pulse shape discrimination; Pure LaCl<sub>3</sub> crystal ⓘ ⓘ English 2021 2021-11 10.1016/j.net.2021.05.020 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Review ⓘ Brain-immune interactions in neuropsychiatric disorders: Lessons from transcriptome studies for molecular targeting ⓘ Understanding the pathophysiological mechanisms of neuropsychiatric disorders has been a challenging quest for neurobiologists. Recent years have witnessed enormous technological advances in the field of neuroimmunology, blurring boundaries between the central nervous system and the periphery. Consequently, the discipline has expanded to cover interactions between the nervous and immune systems in health and diseases. The complex interplay between the peripheral and central immune pathways in neuropsychiatric disorders has recently been documented in various studies, but the genetic determinants remain elusive. Recent transcriptome studies have identified dysregulated genes involved in peripheral immune cell activation, blood-brain barrier integrity, glial cell activation, and synaptic plasticity in major depressive disorder, bipolar disorder, autism spectrum disorder, and schizophrenia. Herein, the key transcriptomic techniques applied in investigating differentially expressed genes and pathways responsible for altered brain-immune interactions in neuropsychiatric disorders are discussed. The application of transcriptomics that can aid in identifying molecular targets in various neuropsychiatric disorders is highlighted. ⓘ Afridi, Ruqayya; Seol, Sihwan; Kang, Hyo Jung; Suk, Kyoungho ⓘ Kyungpook Natl Univ, Dept Pharmacol, Brain Sci & Engn Inst, BK21 Plus KNU Biomed Convergence Program,Sch Med, Daegu, South Korea; Chung Ang Univ, Dept Life Sci, Seoul, South Korea ⓘ ⓘ 57200759784; 57212028150; 56282059200; 7005114595 ⓘ hyokang@cau.ac.kr;ksuk@knu.ac.kr; ⓘ BIOCHEMICAL PHARMACOLOGY ⓘ BIOCHEM PHARMACOL ⓘ 0006-2952 1873-2968 188 SCIE PHARMACOLOGY & PHARMACY ⓘ 2021 6.1 16.3 0.64 2025-07-30 ⓘ 20 21 Neuropsychiatric disorders; Transcriptomics; Immune cells; Brain-immune interactions ⓘ ANTERIOR CINGULATE CORTEX; GENE-EXPRESSION; BIPOLAR DISORDER; PREFRONTAL CORTEX; PSYCHIATRIC-DISORDERS; MICROGLIAL ACTIVATION; CYTOKINE ALTERATIONS; SICKNESS BEHAVIOR; MAJOR DEPRESSION; MENTAL-DISORDERS ⓘ Brain-immune interactions; Immune cells; Neuropsychiatric disorders; Transcriptomics ⓘ Brain; Humans; Mental Disorders; Microglia; Molecular Targeted Therapy; Neuroimmunomodulation; Neuronal Plasticity; Transcriptome; transcriptome; transcriptome; autism; bipolar disorder; blood brain barrier; brain; brain immune interaction; cell communication; depression; differentially expressed gene; gene expression; glia cell; human; immune response; immune system; immunocompetent cell; inflammation; mental disease; neuroimmunology; nonhuman; pathophysiology; priority journal; regulatory mechanism; Review; schizophrenia; single cell analysis; single cell RNA seq; transcriptomics; brain; drug effect; genetics; immunology; immunomodulation; mental disease; microglia; molecularly targeted therapy; nerve cell plasticity; physiology; procedures ⓘ English 2021 2021-06 10.1016/j.bcp.2021.114532 ⓘ 바로가기 바로가기 바로가기 바로가기
페이지 이동: