조현병 입원 환자의 망상과 환각 : 1990년대와 2000년대의 비교

정현진,김대호,오현영,박용천,Jung, Hyun-Jin,Kim, Daeho,Oh, Hyun Young,Park, Yong-Chon 대한생물정신의학회 2013 생물정신의학 Vol.20 No.3

Objectives Research suggests that content of delusion and hallucination in schizophrenia is influenced by culture and social environment. However, few studies investigated chronological change of delusions and hallucinations within a society. To investigate changes in delusions and hallucinations of schizophrenia according to time, we compared contents of symptoms between inpatients with schizophrenia at two different time frames. Methods All admissions to a psychiatric unit of Hanyang University Guri Hospital with discharge diagnoses of schizophrenia at two different five-year time frames (1996-2000 and 2006-2010) were reviewed. Using a checklist, adapted from the Scale for Assessment of Positive Symptoms, we investigated delusions and hallucinations of 247 patients (104 in the 1990s and 143 in the 2000s). Results Delusions and hallucinations of patients did not differ at two time frames. In women, however, auditory and somato-tactile hallucinations were significantly more frequent in the 1990s (p < 0.05). Conclusions Our findings support the literature emphasizing that content and frequency of hallucination may differ according to cultural environment. We speculate that attitude toward sex and defensiveness toward disclosure of symptoms may have contributed to interval difference.

연화산(강원도 태백시)의 관속식물상

정현진,장주은,김알렉세이,이세령,김영수,김지은,이정심,이강협,강은수,한상국,길희영,Hyeon Jin Jeong,Ju Eun Jang,Aleksey L. Kim,Se Ryeong Lee,Young-Soo Kim,Ji Eun Kim,Jung Sim Lee,Kang Hyup Lee,Eun Su Kang,Sang-Kuk Han,Hee-Young Gil 한국자원식물학회 2023 한국자원식물학회지 Vol.36 No.4

Vascular plants of Yeonhwasan Mt., located in Taebaek-si, Gangwon-do, were investigated. Field surveys were conducted fourteen times between April and September of 2022. A total of 505 taxa were found consisting of 87 families, 282 genera, 441 species, 15 subspecies, 41 varieties, and 8 forma. Among them, the endemic plants of Korea were 22 taxa. The number of threatened and near threatened Red List plants designated by the Korean National Arboretum was four, comprising each one of critically endangered (CN), endangered (EN), vulnerable (VU), and near threatened (NT) species. The number of floristic target plants designated by the Ministry of Environment was 102, including one taxon of level V, 9 taxa of level IV, and 34 taxa of level III. Invasive alien plants were 34 taxa, and three taxa were ecosystem disturbance plants. The urbanization index of investigated site was 12.8%, and the naturalization index was 6.7%. To wisely manage Yeonhwasan, measures for preserving biodiversity and preventing invasive plants are needed.

직난시 및 도난시에 따른 동축 소절개 백내장 수술의 난시와 고위수차의 비교분석

정현진,정병주,황형빈,김현승,Hyun Jin Jeong,Byung Ju Jung,Hyung Bin Hwang,Hyun Seung Kim 대한안과학회 2014 대한안과학회지 Vol.55 No.2

Purpose: To assess the changes of corneal astigmatism and higher order aberrations (HOAs) of the anterior and posterior corneal surface after cataract surgery with on-axis clear corneal incision in eyes with-the-rule (WTR) astigmatism and against-the-rule (ATR) astigmatism. Methods: This study included 50 patients who underwent phacoemulsification and IOL insertion through a 2.8-mm on-axis clear corneal incision. The eyes were divided into two groups: (1) 26 eyes with WTR astigmatism with a superior incision and (2) 24 eyes with ATR astigmatism with a temporal incision. During the follow-up period, visual acuity was measured, and the surgically induced astigmatism (SIA) and HOAs of the anterior and posterior corneal surface were measured with Pentacam? (Occlus, Wetzlar, Germany) preoperatively and 1 week, 1 month, and 2 months postoperatively. Results: There were no significant differences in UCVA and BCVA between the two groups. HOAs increased in both groups 1 week after surgery, but no significant differences were found between the groups (p > 0.05). Surgically induced astigmatism was larger in the WTR group than in the ATR group (p < 0.05). At postoperative 2 months, there were significant differences in HOAs between the two groups, and there were statistically significant differences in HOAs, oblique trefoil at front side, and in HOAs, horizontal coma at rear side (p < 0.05). Conclusions: In conclusion, superior incision in eyes with WTR astigmatism resulted in higher SIA compared to temporal incision in eyes with ATR astigmatism. Moreover, HOAs was significantly decreased in eyes with WTR astigmatism with superior incision. Thus, superior incision could be more effective in reducing corneal astigmatism in eyes with WTR astigmatism. J Korean Ophthalmol Soc 2014;55(2):182-189

네트워크 보안관리를 위한 이동에이젼트 설계

정현진(Hyunjin Jung),마복순(Bocksoon Ma),송성훈(Sunghun Song),임채호(Chaeho Lim),원유헌(Yoohun Won) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.2Ⅲ

이동에이젼트는 인터넷 상거래나 자동검색 등에 응용되는 최근 기술이며 이를 컴퓨터네트워크내 컴퓨터시스템의 보안관리을 위한모델을 제안하고 설계하였다. 이를 위해 최근 발표되고 있는 이동에이젼트 기술에 대해 분석하고, 네트워크보안관리 기술을 연구하였으며 IBM이 제안하고 있는 AGLET 환경에 네트워크보안관리 시스템을 탑재한 이동에이젼트 응용시스템을 설계하였다.

수소연료 추진시스템 항공기 개발 및 인증 동향 연구

정현진(Hyunjin Jung),류주헌(Joheon Ryu),이제동(Jedong Lee),최용훈(Yonghoon Choi) 한국항공우주학회 2022 한국항공우주학회 학술발표회 논문집 Vol.2022 No.4

열수 침지 처리가 치콘 절단면의 적변 억제에 미치는 영향

정현진(Hyun Jin Jung),강호민(Ho-Min Kang) 한국원예학회 2014 원예과학기술지 Vol.32 No.3

치콘의 판매 중 상품성 저하의 원인이 되는 치콘 절단면 적변 현상을 억제하기 위해 열수 침지 실험을 실시하였다. 열수침지처리로는 대조구(20℃ 1분)과 38℃에서의 4분, 8분, 42℃에서의 2분, 4분, 그리고 45℃에서의 1분, 2분을 두었다. 색차계로 측정한 △a<SUP>*</SUP>과 △h값은 42℃ 2분 처리에서는 가장 낮게 유지되었으며, 42℃의 2분과 45℃의 1분 처리구에서는 대조구보다 유의 있는 낮은 값을 나타내었다. 10℃에 저장 6일째 관능 평가한 절단면의 적변지수는 42℃의 2분과 4분 처리 그리고 45℃의 1분 처리에서 낮았다. 적변의 원인 물질이 되는 총페놀함량을 저장 6일째 조사하였는데, 이 또한 절단면의 색변화가 적었던 42℃의 2분과 4분 처리 그리고 45℃의 1분 처리에서 낮았다. 페놀물질 합성에 관여하는 PAL 활성은 42℃ 2분 처리에서는 가장 낮은 값을 보였으며, 42℃의 2분와 45℃의 1분 처리구에서는 대조구보다 유의 있는 낮은 수치를 보였다. 그러나 가장 강한 열처리였던 45℃의 2분 처리에서는 절단면의 적변이 대조구와 유사한 수준으로 진행되었으며, 페놀함량과 PAL 활성도 대조구와 차이가 없었다. 공기에 노출된 절단조직에서 페놀물질을 산화시켜 적변을 일으키는 PPO의 활성은 42℃와 45℃의 모든 처리구에서 낮았는데, 특히 다른 조사항목에서는 모두 대조구와 유사한 수준을 보였던 45℃의 2분 처리구가 가장 낮은 수치를 보였다. 또한 각 조사항목간 상관관계에서, PPO를 제외한 모든 조사항목간에서는 대부분 고도의 상관관계를 보였으며, 특히 관능평가한 적변지수와 △h값은 r = 0.927<SUP>***</SUP>를, PAL 활성과 총 페놀물질 함량과는 r = 0.942<SUP>***</SUP>의 고도의 상관관계를 보였다. Hot water dipping test was conducted for chicon to restrict red discoloration of its basal part which impairs the product value during sales. Hot water dipping treatment was given to chicon for 4 min and for 8 min at 38℃ and for 2 min and 4 min at 42℃, and for 1 min and 2 min at 45℃, along with control (for one min at 20℃). The red discoloration indices of basal part of chicon during sensory evaluation on the sixth day of storage under the storage temperature at 10℃ was lower at 42℃ for 2 min, 42℃ for 4 min and 45℃ for 1 min treatments. The color change value of the basal part in chicon measured by colorimeter showed that the lowest △a<SUP>*</SUP> and △h were maintained in the basal part of chicon treated at 42℃ for 2 min. Whereas, color changes in 42℃ for 2 min and 45℃ for 1 min treatments were significantly low as compared with that of control. The contents of total phenolic compounds which are the substances that cause red discoloration of basal part in chicon were lowest at 42℃ for 2 min, 42℃ for 4 min and 45℃ for 1 min treatments. The activity of phenylalanine ammonia lyase (PAL) resposible for in the synthesis of phenolic substances was the least in 42℃ for 2 min treatment. Whereas, PAL activity of the chicons treated a t 42℃ for 2 min and at 4 5℃ for 1 min were significantly lower than t hat of c ontrol. However, r ed d iscoloration was progressed as similar level with that of control in the basal part of chicon at 45℃ for 2 min. The contents of total phenolic compounds and PAL activity in this treatment were not significantly different from those in control. The polyphenol oxidase (PPO) activity which causes red discoloration of cut tissues was low in all the treatments including 42℃ and 45℃ treatment at which no inhibition effects of the red discoloration of basal part of chicon were observed. When the correlation coefficient between each investigated index was tested, most of them showed high correlation except the PPO activity and particularly and the red discoloration index and sensory evaluation △h values, and PAL activity and total phenolic compounds content were r = 0.927<SUP>**</SUP>, and r = 0.942<SUP>**</SUP>, respectively.

RC 슬래브교의 신축이음 손상과 바닥판 응답과의 상관관계 분석

정현진 ( Hyun-jin Jung ),안효준 ( Hyo-joon An ),박기태 ( Ki-tae Park ),정규산 ( Kyu-san Jung ),김유희 ( Yu-hee Kim ),이종한 ( Jong-han Lee ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 논문집 Vol.25 No.6

우리나라 노후화 교량 중 많은 부분을 차지하는 RC 슬래브 교량은 대부분이 교량 안전 관리 및 유지관리의 대상인 1, 2종 교량에 포함되지 않는다. 또한 고속도로 교량에서 가장 높은 손상율을 차지하는 부속시설은 신축이음과 교량 받침부이다. 특히, 신축이음부를 통한 누수는 콘크리트 교량의 열화를 유발하고 균열 및 철근부 노출 등의 원인이 된다. 따라서 본 연구에서는 RC 슬래브교의 신축이음부 유간 밀착 손상이 바닥판 응답에 미치는 영향을 분석하였다. 양단 신축이음의 유간이 밀착된 경우 바닥판의 교축방향 변위가 발생되지 못해, 양쪽 단부 콘크리트에서 균열이 발생하였다. 또한, 응답 결과를 바탕으로 손상시나리오 별 신축이음부의 교축방향 변위와 바닥판 양단 콘크리트 응력과의 상관관계를 분석하고, 손상발생이 교량 거동에 미치는 영향을 파악하였다. 신축이음 장치 양면손상이 발생한 경우 변위와 응력과의 상관관계는 차량이 모든 차선을 지날 때 0.18로 낮은 상관성을 보였다. 무손상 상태와 비교했을 때도 바닥판 처짐은 차량이 지나는 동안 0.34~0.53, 차량이 지나간 후 0.17~0.43으로 낮은 상관성을 보였다. 이는 단부 콘크리트의 균열 발생으로 바닥판 전체 거동에 변화가 생긴 것을 의미한다. 따라서 바닥판 응답 데이터 기반 상관관계 분석과 이를 활용한 데이터 기반의 손상탐지가 가능하며, 이를 통해 바닥판 손상 및 열화의 원인이 되는 신축이음부의 조기 보수 및 보강, 사전관리에 기여하여 많은 도움이 될 것으로 기대된다. RC slab bridges account for the largest portion of deteriorated bridges in Korea. However, most RC slabs are not included in the first and second classes of bridges, which are subject to bridge safety management and maintenance. The highest damaged components in highway bridges are the subsidiary facilities including expansion joints and bearings. In particular, leakage through expansion joints causes deterioration and cracks of concrete and exposure of reinforced bars. Therefore, this study analyzed the effect of adhesion damage at expansion joints on the response of the deck in RC slab bridges. When the spacing between the expansion joints at both ends was closely adhered, cracks occurred in the concrete at both ends of the deck due to the resistance rigidity at the expansion joints. Based on the response results, the correlation analysis between displacements in the longitudinal direction of the expansion joint and concrete stress at both ends of the deck for each damage scenario was performed to investigate the effect of the occurrence of damage on the bridge behavior. When expansion joint devices at both sides were damaged, the correlation between displacement and stress showed a low correlation of 0.18 when the vehicles proceeded along all the lanes. Compared with those in the intact state, the deflections of the deck in the damaged case at both sides showed a low correlation of 0.34 to 0.53 while the vehicle passed and 0.17 to 0.43 after the vehicle passed. This means that the occurrence of cracks in the ends of concrete changed the behavior of the deck. Therefore, data-deriven damage detection could be developed to manage the damage to expansion joints that cause damage and deterioration of the deck.

고려엉겅퀴로부터 폴리페놀과 플라보노이드 염기 열수추출 조건 최적화

정현진 ( Hyun Jin Jung ),한여정 ( Yea Jeng Han ),이도경 ( Do Kyoung Lee ),감다혜 ( Da Hae Gam ),김진우 ( Jin Woo Kim ) 조선대학교 공학기술연구원 2018 공학기술논문지 Vol.11 No.2

In this study, we developed a method for improving the production of polyphenol compounds and flavonoids from Korean thistle (Cirsium japonicum) extracts using hot-water extraction. In order to enhance the production of polyphenol compound and flavonoids, five independent variables (solvents, concentration, extraction time, extraction temperature, and solid-liquid ratio) were optimized. The results showed hot-water extraction using NaOH solution provided a higher total phenolic compounds (TPC) extraction than the organic solvents and the extraction using 1 N NaOH showed the highest production of TPC of 5.18 mg GAE/g DM. Among the tested variables, extraction temperature and time showed positive effects within tested levels of variables. The optimum extraction condition for TPC and flavonoids was obtained as follows: 1 N NaOH, extraction time of 40 min, reaction temperature of 120°C, and solid-liquid ratio of 10%(w/v). Under the optimum conditions of alkaline hot-water extraction, experimentally obtained TPC and flavonoid concentrations were 9.71 mg GAE/g DM and 2.23 mg QE/g DM, respectively. Therefore, alkaline hot-water extraction under mild condition was confirmed as an effective process for polyphenolic compounds and flavonoid production from Korean thistle.

동바리 부재 연결부 경계조건에 따른 구조 성능 한계상태 평가

정현진 ( Jung Hyun-jin ),박세인 ( Park Sae In ),이종한 ( Lee Jong-han ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1

콘크리트 교량 시공에 많이 적용되고 있는 시스템 동바리는 연결부의 불확실성으로 인한 붕괴사고가 많이 발생하고 있어 구조적 안정성 검토가 필수적으로 요구되는 실정이다. 시스템 동바리는 수직재, 수평재, 가새재 등으로 구성되며 유사한 유형이 반복되는 구조이다. 본 연구에서는 시스템 동바리에 대한 대표 단위모델을 선정한 후 수직재와 수평재의 연결부 경계조건에서 회전 강성에 따라 고정 연결과 힌지 연결로 구분하여 모델링하였다. 두 모델에 대한 비선형 정적해석을 수행하여 부재 연결부 경계조건에 따른 성능점 정의 및 비교를 통해 부재 연결부 조건이 구조물 거동에 미치는 영향을 평가하였다.

예냉 처리가 퉁퉁마디의 MA 저장성에 미치는 영향

정현진(Hyun Jin Jung),유태종(Tae Jong Yoo),손진성(Jin Sung Son),이스람모하메드조히를(Mohammad Zahirul Islam),홍성미(Sung Mi Hong),지수빈(Su Bin Ji),강호민(Ho-Min Kang) 한국원예학회 2011 한국원예학회 학술발표요지 Vol.2011 No.5