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Yoon, Young-Gon,Choi, Insoo,Lee, Chang-Ha,Han, Jonghee,Kim, Hyoung-Juhn,Cho, EunAe,Yoo, Sung Jong,Nam, Suk Woo,Lim, Tae-Hoon,Yoon, Jong Jin,Park, Sehkyu,Jang, Jong Hyun Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.12
This paper describes how primary contaminants in ambient air affect the performance of the cathode in fuel cell electric vehicle applications. The effect of four atmospheric pollutants ($SO_2$, $NH_3$, $NO_2$, and CO) on cathode performance was investigated by air impurity injection and recovery test under load. Electrochemical analysis via polarization and electrochemical impedance spectroscopy was performed for various concentrations of contaminants during the impurity test in order to determine the origins of performance decay. The variation in cell voltage derived empirically in this study and data reported in the literature were normalized and juxtaposed to elucidate the relationship between impurity concentration and performance. Mechanisms of cathode degradation by air impurities were discussed in light of the findings.
내면아이치료 상담사들의 치유 경험에 관한 현상학적 연구: 상담사 자기치유와 내담자 치유와의 연결고리
이윤재(Yoon Jae Lee),오제은(Jay Oh),박은아(Euna Park),하영윤(Young Yoon Ha) 사단법인 한국부부가족상담협회 2023 부부가족상담연구 Vol.4 No.2
본 연구는 내면아이치료 상담사들이 상담 현장에서 내담자들과의 상담관계를 통해 얻는 경험들을 이해하고자 Giorgi의 기술적 현상학적 방법으로 이루어졌다. 이를 위해 내면아이상담전문가 자격을 취득하고, 5년 이상 내면아이치료 경험을 가진 내면아이치료 상담사 7명을 참여자로 선정하여 심층 면담을 실시하였다. 수집된 자료의 분석 결과, 참여자 경험의 의미를 밝혀준 386개의 의미 단위를 도출한 후 중복되거나 구조 밖의 것들을 제외한 83개의 중심의미를 구성하였다. 중심의미들을 다시 24개의 하위구성요소와 8개의 핵심 구성요소인 ‘상처받은 내면아이를 발견함’, ‘상처받은 내면아이를돌봄’, ‘놀라운 아이를 만남’, ‘치유에 확신이 생김’, ‘또 다른 상처받은 내면아이와의 만남’, ‘또 다른상처받은 내면아이의 돌봄에 함께 함’, ‘또 다른 놀라운 아이를 만남’, ‘함께 동반 성장함’로 의미구조를 밝혔다. 마지막으로, 본 연구참여자인 내면아이치료 상담사들의 경험에 초점을 맞추어 치유의 연결고리라는 주제로 재구성하여 일반적 구조 기술로 통합, 정리하였다. 본 연구의 결과들이 가지는 시사점을 중심으로 논의와 연구의 임상적 의의를 기술하였으며, 제한점 및 향후 연구를 위한 방향을 제언하였다. This study aimed to understand the experiences of Inner Child Therapists’ in counseling relationships with their clients by employing the descriptive phenomenological method developed by Giorgi (2004). For this purpose, seven Inner Child Therapists with more than five years of experience were selected and in-depth interviews were conducted. The analysis yielded 386 semantic units and 83 central meanings. Meaning structures were determined by 24 sub-components and 8 key components, including ‘Discovering a Wounded Inner Child,’ ‘Caring for a Wounded Inner Child,’ ‘Meeting a Wonderful Child,’ ‘Confidence in Healing,’ ‘Discovering Another Wounded Inner Child,’ ‘Being with Another Wounded Inner Child,’ ‘Meeting Another Wonderful Child,’ and ‘Growing Together.’ Finally, with a focus on the participants’ experiences, general structural descriptions were formulated under the theme of the linked healing process. The study discussed the clinical significance and the implications, along with highlighting limitations and proposing directions for future research.
윤은아(Euna YOON),이용훈(Younghoon LEE),나영수(Youngsoo NA),이경훈(Kyounghoon LEE) 전남대학교 어업기술연구소 2016 어업기술연구소보고지 Vol.9 No.1
This study was aimed to measure the acoustic impedance as a dominant factor to estimate the amount of fish resources for fisheries resource rebuilding program of jack mackerel. The fish’s acoustic impedance is one of main factors for TS measurement. The acoustic impedance needs to know sound speed contrast and density contrast of target fish. The density contrast was carried out by the Pipette method and the sound speed contrast was measured by the Time-of-flight method. To obtain sample information of jack mackerel in the experiment, 20 individuals used. Its body length and weight were measured by using an electronic scales and body length measure plate. As a result, the body length of the jack mackerel increases the weight also increases. There was low correlation with body length and density. Additionally, acoustic speed contrast tended to decrease with increased water temperature. To reduce the measured error of the TS measurement, it is necessary to apply a suitable sound speed contrast and density contrast of jack mackerel to the distributed water condition.
현수법과 모델을 이용한 조피볼락의 유영자세각과 체장에 따른 음향 후방산란강도
윤은아 ( Euna Yoon ),김기선 ( Kiseon Kim ),이인태 ( Intae Lee ),조현정 ( Hyeon-jeong Jo ),이경훈 ( Kyounghoon Lee ) 한국어업기술학회 2017 수산해양기술연구 Vol.53 No.2
Rockfish was a commercially important fish specie in marine ranching areas in Korea. To estimate density and biomass of rockfish using acoustic method, target strength (TS) information is required on the species. This study measured TS dependence on tilt angle and size on 14 live rockfish individuals at 38, 70, and, 120 kHz by ex-situ measurement (tethered method) and acoustic scattering model (Krichhoff ray mode, KRM). The swimbladdered angle ranged from 18 to 30˚ (mean ± s.d. = 26 ± 4˚). The mean TS for all individuals was highest -35.9 dB of tilt angle -17˚ at 38 kHz, -35.4 dB of tilt angle -25˚ at 70 kHz, and -34.9 dB of tilt angle -22˚ at 120 kHz. The ex-situ TS-total length (TL, cm) relationships were TS<sub>38kHz</sub> = 20log<sub>10</sub>(TL) - 67.1, TS<sub>70kHz</sub> = 20log<sub>10</sub>(TL) - 68.6, and TS<sub>120kHz</sub> = 20log<sub>10</sub>(TL) - 69.9, respectively. The model TS-total length (TL, cm) relationships were TS<sub>38kHz</sub> = 20log<sub>10</sub>(TL) - 66.4, TS<sub>70kHz</sub> = 20log<sub>10</sub>(TL) - 67.0, TS<sub>120kHz</sub> = 20log<sub>10</sub>(TL) - 67.0. The two measurements between the ex-situ TS and KRM model for TS-tilt angle and fish size were found to be significantly correlated.
Glioblastoma Cellular Origin and the Firework Pattern of Cancer Genesis from the Subventricular Zone
Yoon, Seon-Jin,Park, Junseong,Jang, Dong-Su,Kim, Hyun Jung,Lee, Joo Ho,Jo, Euna,Choi, Ran Joo,Shim, Jin-Kyung,Moon, Ju Hyung,Kim, Eui-Hyun,Chang, Jong Hee,Lee, Jeong Ho,Kang, Seok-Gu The Korean Neurosurgical Society 2020 Journal of Korean neurosurgical society Vol.63 No.1
Glioblastoma (GBM) is a disease without any definite cure. Numerous approaches have been tested in efforts to conquer this brain disease, but patients invariably experience recurrence or develop resistance to treatment. New surgical tools, carefully chosen samples, and experimental methods are enabling discoveries at single-cell resolution. The present article reviews the cell-of-origin of isocitrate dehydrogenase (IDH)-wildtype GBM, beginning with the historical background for focusing on cellular origin and introducing the cancer genesis patterned on firework. The authors also review mutations associated with the senescence process in cells of the subventricular zone (SVZ), and biological validation of somatic mutations in a mouse SVZ model. Understanding GBM would facilitate research on the origin of other cancers and may catalyze the development of new management approaches or treatments against IDH-wildtype GBM.
IPA분석을 통한 재해구호물품 평가 및 개선 - 경기도 수해 이재민을 대상으로 -
Yoon, Sanghoon,Lee, Seunghee,Lee, Eunae 한국재난정보학회 2015 한국재난정보학회 논문집 Vol.11 No.3
본 연구는 재해이재민 지원서비스 중 재해구호물품을 중심으로 이재민의 Needs 파악과 효율성을 평가하고자 하였다. 분석결과, 응급구호세트와 취사구호세트의 경우 1차 필수품과 2차 필수품으로 새롭게 분류되었다. 1차 필수품의 경우 생활에 직접적으로 연결되는 물품, 2차 필수품의 경우 있으면 편리하긴 하나 생활에 꼭 필요하지 않은 물품으로 정의내릴 수 있었다.이는 향후 중점개선사항으로 도출된 1차 필수품들을 2차 필수품의 제외 및 대체를 통하여 개선할 수 있으며 추가적으로 고려할 수 있는 물품과의 교체가 필요할 것으로 판단된다. 본 연구의 분석결과는 향후 재해 구호물품과 관련된 계획 수립시 기초자료로 활용될 수 있을 것이다. The study is to understand the needs of flood victims of Korea through the analysis of relief goods, and to assess extent of support-service efficiencies. According to the analysis, both emergency relief kit and cooking relief kit are possibly labelled 'the primary' and 'the secondary necessaries' respectively. Here the former includes those items directly related with basic living condition for the victims while the latter does some of items for more convenience lifestyle. The results of the study would be substantial in the sense that they could provide some useful clues upon which improvement policies or programs associated with relief goods for flood victims are derived.
Yoon, Songhun,Kang, Eunae,Kim, Jin Kon,Lee, Chul Wee,Lee, Jinwoo Royal Society of Chemistry 2011 Chemical communications Vol.47 No.3
<P>An ordered mesoporous WO<SUB>3−<I>x</I></SUB> material was employed for use as a supercapacitor electrode. This material exhibited a high rate capability and an excellent capacitance (366 μF cm<SUP>−2</SUP>, 639 F cm<SUP>−3</SUP>), which were probably attributed to the large ordered mesopores, high electrical conductivity, and high material density.</P> <P>Graphic Abstract</P><P>An ordered mesoporous WO<SUB>3−<I>x</I></SUB> material was employed as a supercapacitor electrode. It shows a high rate capability and an excellent capacitance (366 μF cm<SUP>−2</SUP>, 639 F cm<SUP>−3</SUP>), due to the large ordered mesopores, high electrical conductivity and high material density. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0cc03594g'> </P>
Epidemiological Characteristics of Mobile Phone Ownership and Use in Korean Children and Adolescents
Yoon-Hwan Byun,Mina Ha,Ho-Jang Kwon,Kyung-Hwa Choi,Eunae Burm,Yeyong Choi,Myung-Ho Lim,Seung-Jin Yoo,Ki-Chung Paik,Hyung-Do Choi,Nam Kim 환경독성보건학회 2013 환경독성보건학회지 Vol.28 No.-
Objectives As public concern on possible harmful effects of mobile phone in children has been raised, information of epidemiological characteristics of mobile phone use in children and adolescents will be essential for public health policy. Methods Using three databases (n=21,693) collected from 2008 to 2011, we examined characteristics of mobile phone ownership and use, and socioeconomic positions (SEP) in Korean children and adolescents. Results The ownership rate and the amount of mobile phone use were higher in females than males, in higher school grades than lower grades, and at 2011 than 2008. The average age of first mobile phone ownership was shown to decrease from 12.5 years in currently high school students to 8.4 years in currently elementary school students at 2011. More than 90% of children in the 5th grade owned a mobile phone. More children owned a mobile phone in lower SEP communities than in higher SEP. Children with parents educated less than those with parents educated more were more likely to own and use mobile phone. Conclusions Considering the epidemiological characteristics of mobile phone use, precautionary measures to prevent unnecessary exposure to mobile phones are needed in children and adolescents.