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Jiyeong Park,Hyuk Kwon,Jahyun Na,Yongshik Chun,Wook Kim,Yonggyun Kim 한국응용곤충학회 2014 한국응용곤충학회 학술대회논문집 Vol.2014 No.10
A novel oxidant fumigation (NOF) is a commercial bleaching and disinfection agent. Recent study indicates its insecticidal activity. However, its exact mode of action to kill insects is not known. This study sets up a hypothesis that reactive oxygen species released from NOF is a main factor to kill insects. Plodia interpunctella is a lepidopteran insect pest infesting various stored grains. Both larvae and adults were susceptive to NOF. To test the hypothesis, we needed to identify antioxidant genes in P. interpunctella. Superoxide dismutase (SOD) and thioredoxin-peroxidase (Trx) were identified from P. interpunctella EST library using ortholog sequences of Bombyx mori. Both SOD and Trx were expressed in larvae of P. interpunctella expecially against oxidative stress induced by bacterial challenge. The bacterial challenge also induced some heat shock protein (HSP) genes. Similarly, different doses of NOF significantly induced both SOD and Trx genes. There results suggest that NOF at sublethal doses releases reactive oxygen species, which may be detoxified by the antioxidant activities of SOD and Trx of P. interpunctella.
Kwon, Ochang,Lee, Jiyeong,Kim, Garam,Kim, Incheol,Lee, Junhwan Elsevier 2019 Computers and geotechnics Vol.111 No.-
<P><B>Abstract</B></P> <P>The pullout load carrying behavior of helical anchors for inclined loading conditions was investigated based on the coupled Eulerian-Lagrangian (CEL) analyses. Various types of helical anchors, specified as Types 1 to 6, were adopted in the analyses. Types 1, 2 and 3 represent those with one, two, and three equal-diameter helical plates and Type 4 was a helical anchor type with two helical plates of different diameters. Types 5 and 6 were both with three helical plates of different diameters in opposite diameter configurations. Inclined loading conditions affected the pullout capacity (Q<SUB>u</SUB>) of helical anchors producing lower Q<SUB>u</SUB> with increasing load inclination. The patterns of the Q<SUB>u</SUB> decrease with increasing load inclination were similar for all helical anchor types considered in this study. The values of Q<SUB>u</SUB> were approximately similar up to θ = 60° and then decreased continually with furthering increasing θ. Q<SUB>u</SUB> was lowest at θ = 90°. The top-down increasing diameter configuration of helical plates was more efficient than the bottom-up increasing diameter configuration. A normalized load capacity relationship was proposed, which can be used to evaluate Q<SUB>u</SUB> for inclined loading conditions. The pullout behavior of helical anchors was governed by helical plates with marked effects of helical plate configuration, which was however less pronounced with increasing θ.</P>
권진혁 ( Jin-hyeok Kwon ),윤지영 ( Jiyeong Yun ),윤종영 ( Jongyoung Youn ),이동훈 ( Donghoon Lee ),김성진 ( Sungjin Kim ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.1
In recent, unmanned Aircraft Systems (UAS) have been widely used for various purposes, such as safety inspection, facility condition inspection, progress monitoring, in the architecture engineering, and construction (AEC) industry. This technology can provide visual assets regarding the conditions of construction jobsites as well as constructed facilities during flying over the point of interests. With the significant interests in this advancement, the recent studies have presented how the UAS can be applied fro different types of facilities (e.g., buildings, power genereation systems, roads, or bridges) to inspect the current conditions of them for safe operations as well as public’s safety. This study reviewed the receent studies to document their scientific findings and practical contributions, as well as provided the overview of further implications for future studies.
Occult uterine sarcoma in presumed uterine leiomyomas
( Seonghye Park ),( Hyewon Seo ),( Jeong Namkung ),( Jiyeong Kwon ),( Chanju Kim ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-
Objective: To investigate the risk of uterine sarcoma during uterine surgery in university hospital in Korea. Methods: Design: Retrospective cohort study Setting: Multicencet academic university hospitals Patients or Participants: Patients undergoing myomectomies performed for presumed uterine leiomyomas by gynecologists between 2010 and 2017. Interventions: All patients undergone myomectomy for presumed leiomyoma. Results: Measurements and Main Results: Total 3107 cases of myomectomy were identified using clinical databases. There were 2118 (68.2%) cases of laparoscopic/robot-assisted myomectomy, 989 (31.8%) cases of open myomectomy. We identified 32 uterine malignancies. In 3 cases, there was no evidence of a malignancy preoperatively and hiostologic comfirmed to uterine sarcomas postoperatively( all 3 cases were underwent open myomectomy) . Conclusion: Conclusion: A small risk(0.09%[3/3107]) of uteine sarcoma during myomectomy withour power morcellation was found in our study. We did not observe on occult case of sarcoma after laparoscopi/robot-assisted myomectomy with power morcellation. For these reasons, minimally invasive surgery with morcellation is still considerable option for treatment of myomas.
국가 지오이드 모델 KNGeoid13 구축 및 정밀도 검증
백경민(Baek, Kyeongmin),이지선(Lee, Jisun),신광수(Shin, Gwang-soo),권재현(Kwon, Jay Hyoun),문지영(Moon, Jiyeong) 한국측량학회 2014 한국측량학회 학술대회자료집 Vol.2014 No.4
The previous geoid model of Korea developed in mid 2000s was 10cm level of precision due to the gravity data which shows bias of distribution and low quality. From 2011, NGII(National Geographic Information Institute) started the study of the national geoid model including the whole country and constructed national geoid model in 2012. However, the precision was relatively low at the mountainous area because most of the gravity data exist at the plane area. In this study, new national geoid model KNGeoid13 has been calculated based on the available gravity data with new data on the triangulation points. The degree of fit and precision of KNGeoid13 are 3.08cm and 3.41cm respectively. And the relative precision in 15km baseline is 2.58cm. In the future, precise national geoid model should be developed including unified ship-borne gravity data and new land gravity data at the triangulation point. Also, obtaining accurate GNSS-derived orthometric height will be possible through constructing precise national geoid model,
Okhee Choi,Jung-Joon Park,Byeongsam Kang,Yeyeong Lee,Jiyeong Park,Jin-Hyeuk Kwon,Jinwoo Kim 경상대학교 농업생명과학연구원 2018 농업생명과학연구 Vol.52 No.2
Circular leaf spot(CLS) disease causes considerable economic damage to persimmon(Diospyros kaki) in South Korea. Mycosphaerella nawae ascospores are the primary inoculum for CLS epidemics. In this study, we investigated the seasonal fluctuation of spore release and its relationship to environmental factors, based on spore trapping. We evaluated the seasonal pattern of released M. nawae ascospores in South Korea. During three persimmon growing seasons(2010 to 2012), we recorded the release of ascospores in two regions, Jinju and Gimhae, which are major producing regions of sweet persimmon in South Korea. The release of CLS ascospores was from the first week of May to the end of July. The maximum release of spores was observed in late June. A computer model used accumulated degree days to simulate ascospore release. The overall mean accumulated degree days, from 01 May to 50% ascospore release for the observed data(1174℃ days), was not significantly different from the predicted value of 1144℃ days. The mean differences between predicted and observed release percentages for the sampling periods were not significantly different from zero.