금융포커스 : 신용카드사 연체율 개선과 흑자전환 가능성 / 자산운용사, 해외간접상품 투자규모 확대 / 방카슈랑스 제도의 운영방향

지동현 ( Dong Hyun Ji ) 한국금융연구원 2004 주간 금융 브리프 Vol.13 No.32

벤치마킹을 이용한 밤 재배 경영모델 개발 - 충청남도에 적용 가능한 밤 경영 표준진단표의 개발

지동현(Dong-Hyun Ji),김연태(Yeon-Tae Kim),강길남(Kil-Nam Kang),오도교(Do-Kyo Oh),노희경(Hee-Kyoung Noh),김세빈(Se-Bin Kim),곽경호(Kyoung-Ho Kwark) 충남대학교 농업과학연구소 2010 농업과학연구 Vol.37 No.3

The purpose of this research was to construct an efficient management system in developing and supplying a ‘management standard diagnostic table’ for the improvement of chestnut cultivation farmhouse. ‘Chestnut management standard diagnostic table’ were based from the actual condition of chestnut management in Chungcheongnam-do, selected ‘appraisal factor item’ and by consulting ‘agricultural plant standard diagnostic table’ and various kinds of data which had already been developed. This research also consulted the classification systems and degree of importance. The developed ‘Chestnut management diagnostic table’ consisted of 3 first classified items, 19 second classified items and 2 product indicator items.

망막분지정맥폐쇄에서 패턴 광응고술과 기존의 광응고술과의 효과 비교

박영근,지동현,양지욱,Young-Gun Park,MD,Dong Hyun Jee,MD,Ji-Wook Yang,MD 대한안과학회 2010 대한안과학회지 Vol.51 No.10

Purpose: To compare the clinical effect and complications between patterned laser photocoagulation with short exposure time and conventional laser photocoagulation for neovascularization in branch retinal vein occlusion (BRVO). Methods: A prospective study was conducted on 36 patients (39 eyes) who required laser photocoagulation for neovascularization due to BRVO. The patients were divided into 2 groups, the patterned laser photocoagulation group (laser exposure time 0.02 sec, 3 × 3 array patterned photocoagulation) and conventional laser photocoagulation group (laser exposure time 0.2 sec). Other laser parameters (burn intensity and spot size) were the same. Pain score at the time of treatment was monitored after the laser photocoagulation. In addition, best-corrected visual acuity as well as central macular thickness measurements were performed before the treatment and after 2, 4, 8, and 12 weeks. The regression of neovascularization in fluorescein angiography was monitored during follow-up periods. Results: The patterned laser photocoagulation group had a greater reduction in pain during laser photocoagulation, and a decreased change in central macular thickness after laser photocoagulation than the conventional laser photocoagulation group. In particular, the patterned laser photocoagulation group had a statistically significant difference between the 2 groups at postoperative 8 and 12 weeks. The regression rate of neovascularization between the 2 groups had no statistically significant difference. Conclusions: Patterned laser photocoagulation with a short exposure time decreases pain and postoperative macular edema with no difference in regression of neovascularization. Patterned laser photocoagulation with a short exposure time can be considered as a useful and efficient method for neovascularization in BRVO. J Korean Ophthalmol Soc 2010;51(10):1368-1373

충남지역 밤나무 재배 임가의 경영 효율성 분석

원현규 ( Hyun Kyu Won ),전준헌 ( Jun Heon Jeon ),유병일 ( Byoung Il Yoo ),이성연 ( Seong Youn Lee ),이정민 ( Jung Min Lee ),지동현 ( Dong Hyun Ji ) 한국산림과학회 2013 한국산림과학회지 Vol.102 No.3

The study, utilizing a data envelopment analysis (DEA) which is one of the nonparametric estimation methods, aims to evaluate the management efficiency of chestnut tree cultivators in such provinces in Chungchungnam-do as Cheong-yang, Gong-ju, Bu-yeo and so on. The analysis data of this study is based on inputs and outputs of 20 forestry households surveyed in the 2012 survey titled ‘A Study on Current Level and Condition of Chestnut Cultivation and Management’, which was conducted from March 2012 to October 2012. The elements of inputs are composed of management cost, harvesting cost, material cost, non-operation expenses and cultivation area, while the element of output is a gross margin only. Then the study analyzes a technical efficiency, a puretechnical efficiency and a scale efficiency using CCR and BCC model among DEA methods. Based on that, it also provides improvement methods for forestry households that turned out to be inefficient. In order to verify the result of DEA analysis, the study additionally compares a result of this efficiency study with that of chestnuts management standard diagnostic table. According to the result, the average value of technical efficiency analyzed was 0.667,proving to be inefficient in general. Given that the average value of pure-technical efficiency was 0.944 and that of scale efficiency was 0.703, it can be inferred that inefficiency exists in the field of scale, not in the field of cultivation techniques. As for forestry households with the efficiency score of 1, it is shown that there were 6households that recorded 1 in the technical efficiency field and 13 households that recorded 1 in the pure technical efficiency. Meanwhile, there were 6 households that recorded 1 in all of the three aspects. In the comparison with the scores from chestnuts management standard diagnostic table, there were 5 households made a high score of over 80, among which are 3 households with score 1 in the technical efficiency. Also, the results of this study and the chestnuts management standard diagnostic table are proved to have the same result, both of them showing the same households that recorded the highest score and the lowest score. This means the management efficiency evaluation using DEA can be applied to the fieldwork along with the chestnuts management standard diagnostic table.

유리체절제술과 백내장 동시수술에서 네지지부인공수정체의 안정성

김재우,양지욱,지동현,Jae Woo Kim,Ji Wook Yang,Dong Hyun Jee 대한안과학회 2010 대한안과학회지 Vol.51 No.6

Purpose: To evaluate the stability of intraocular lenses (IOLs) according to the haptic design in combined surgery (phacoemulsification, intraocular lens insertion, and vitrectomy) by comparing early IOP elevation and the accuracy of IOL power. Methods: A retrospective study was conducted for 85 eyes of 85 patients who had undergone combined surgery. IOP elevation one week postoperatively and the difference between target refraction and postoperative refraction after two months were evaluated in all patients. All eyes were allocated to either a 2-haptic IOL group or a 4-haptic IOL group, and then each group was divided into three subgroups: gas-filled, silicone oil-filled, or balanced salt solution-filled. Results: In the balanced salt solution-filled group, the early IOP increase was significantly less in the 4-haptic IOL group than it was in the 2-haptic IOL group (3.24 mmHg vs. 6.15 mm Hg, p=0.025). The myopic shifts of the 2-haptic IOL group were significantly greater than those of the 4-haptic IOL group for all of the subgroups (gas subgroup -0.71D vs. -0.31D, p=0.045; balanced salt solution subgroup -0.66D vs. -0.16D, p=0.018). Conclusions: In combined surgery, 4-haptic IOL implantation showed significantly less early IOP elevation and less myopic shift than those of 2-haptic IOL implantation. J Korean Ophthalmol Soc 2010;51(6):829-834

당뇨황반부종에서의 유리체강내 라니비주맙 주입술의 단기효과

공석준,양지욱,지동현,Seok Joon Kong,Ji Wook Yang,Dong Hyun Jee 대한안과학회 2010 대한안과학회지 Vol.51 No.11

Purpose: To evaluate the short-term effect of an intravitreal injection of ranibizumab in the treatment of diabetic macular edema. Methods: Eighteen eyes of 18 patients who underwent intravitreal ranibizumab injection for the treatment of diabetic macular edema between March 1 and November 30, 2009 were retrospectively evaluated. Complete ophthalmic examinations including best corrected visual acuity and optical coherence tomography (OCT) were performed at baseline and follow-up visits at one and three months. Results: The mean visual acuity improved from logMAR 0.74 ± 0.45 at baseline to logMAR 0.44 ± 0.26 at one month and to logMAR 0.42 ± 0.23 at three months (p < 0.05). The mean central macular thickness decreased from 429.5 ± 71.9 μm at baseline to 299.9 ± 81.2 μm at one month and to 284.6 ± 82.6 μm at three months (p < 0.05). No adverse side effects were observed following the injections. Conclusions: The observed macular edema and visual acuity improvements demonstrated that intravitreal ranibizumab injection may be useful for the treatment of patients with diabetic macular edema. J Korean Ophthalmol Soc 2010;51(11):1453-1458

FRP 기둥 재킷 시스템이 보강된 지진 취약 철근콘크리트 건축물의 유한요소해석

신지욱,이상열,지동현,Shin, Jiuk,Lee, Sang-Youl,Ji, Dong-Hyun 한국공간구조학회 2021 한국공간구조학회지 Vol.21 No.2

This study develops finite element models for seismically-deficient reinforced concrete building frame retrofitted using fiber-reinforced polymer jacketing system and validates the finite element models with full-scale dynamic test for as-built and retrofitted conditions. The bond-slip effects measured from a past experimental study were modeled using one-dimensional slide line model, and the bond-slip models were implemented to the finite element models. The finite element model can predict story displacement and inter-story drift ratio with slight simulation variation compared to the measured responses from the full-scale dynamic tests.

표고버섯 경영 표준진단표의 개발 및 현지 적용

전준헌 ( Jun Heon Jeon ),원현규 ( Hyun Kyu Won ),유병일 ( Byoung Il Yoo ),이성연 ( Seong Youn Lee ),이정민 ( Jung Min Lee ),지동현 ( Dong Hyun Ji ),김연태 ( Yeon Tae Kim ),강길남 ( Kil Nam Kang ),오득실 ( Duk Sil Oh ) 한국산림과학회 2013 한국산림과학회지 Vol.102 No.2

This study aims to develop a standard diagnostic table for management and administration that oak mushroom cultivators of forestry households can utilize. By diagnosing their current level of management with the table, the cultivators themselves will be able to grasp and address their operational challenges better. The table is composed of; questions on the status of forestry households; columns for a series of management performance indices, and; questionnaire with 4 categories and 20 subcategories to check the current level of management and administration by the households. In order to prepare the standard diagnostic table for oak mushroom management, 196 forestry households throughout 10areas-Cheong-yang, Gong-ju, Bu-yeo and Seo-cheon in Chuncheongnam-do, Mun-kyung and Ye-cheon in Gyeongsangbuk-do, Jin-an in Jeollabuk-do, Jang-heung and Jang-seong in Jeollanam-do, and Jeju Islands-were interviewed with and a total of 190 questionnaires were acquired and made use of in the result analysis. Then, the score on management level of each forestry household was determined in the way of aggregating scores from each subcategory. The overall average score of every household was calculated at 62.2 point with more than half of the respondents, 54.7%, belonging to the range of 60 to 80. When considered by regional groups, the average score of Jin-an was the lowest with 57.6 point while that of Jang-seong was the highest with 69.6 point. In case of the ‘cultivation management’ category, there were a lot of cultivators who expressed a negative awareness of the term ‘pest control’ because they had a tendency to think the term in connection with ‘herbicides or pesticides’. So it is inevitable to adapt and modify existing groups and grades to make sure that the cultivators can make a right choice without confusing the cincept ‘pest control’ with ‘herbicides or pesticides’. Meanwhile, the average scores of ‘management and administration’ categories were mostly low. It was remarkable in these categories that forestry households in Jeolla province, which had remained in lower ranks in the other three categories, recorded higher scores than those in Chungcheong province, boasting a relatively high level of management and administration.

산양삼 경영 표준진단표의 개발 및 현지 적용

전준헌 ( Jun Heon Jeon ),이성연 ( Seong Youn Lee ),이정민 ( Jung Min Lee ),지동현 ( Dong Hyun Ji ),김연태 ( Yeon Tae Kim ),강길남 ( Kil Nam Kang ) 한국산림과학회 2014 한국산림과학회지 Vol.103 No.4

This study aims to develop a standard diagnostic table for mountain ginseng so that the cultivators notonly can check their current level of management with the table, but also can understand and address operationalchallenges better by themselves utilizing the table. The standard diagnostic table consists of 3 categories and 18subcategories to diagnose the general status of forestry households, the indicators of management performance andthe level of management. To develop the table, the study conducted a survey on the actual condition ofmanagement, targeting 81 forestry households throughout 15 municipalities including Mu-ju, Jeollabukdo, andHam-yang, Gyeongsangnamdo, all of which are the chief producing districts of mountain ginseng. Then, the studycalculated total scores by regions by aggregating the scores of 18 subcategories, in order to evaluate and comparethe management level among regions based on the scores. According to the result, the average score of 81 forestryhouseholds was 57.2 point-58% of which surveyed belonged to the range of 40-60 point. Compared by regions,the average score of Jeollabukdo regions was 52.9 point, the lowest, and that of Gyeongsangnamdo regions was61.4 point, the highest. It is remarkable that among the indicators of management base, the average score of‘mounding (the height of mound)’ item was recorded rather low with 1.59 point, reflecting the fact that thecultivators tend to raise mountain ginseng with no additional mounds. As for the indicators of production skills,the average score of the pest control item was remarkably low with 1.28 point. Over 90% of cultivators answeredthat they do not usually forecast or survey the pest disease in advance. Meanwhile, it is also noticeable that theitem of sowing and planting methods, and the item of seed were both rather high, recording 4.00 and 4.47 pointrespectively. As for the item of management and sales skill, however, the score was rather low with 2.20 point,meaning that the forestry households still have a low interest in the business management.

잣나무림의 임분구조가 온열환경과 인체의 생리반응에 미치는 영향

정다워 ( Da Wou Joung ),권치원 ( Chi Won Kwon ),염동걸 ( Dong Geol Yeom ),최윤호 ( Yoon Ho Choi ),김건우 ( Gun Woo Kim ),강길남 ( Kil Nam Kang ),김연태 ( Yeon Tea Kim ),지동현 ( Dong Hyun Ji ),박범진 ( Bum Jin Park ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-

본 연구는 잣나무림의 임분구조가 온열환경과 인체의 생리반응에 미치는 영향을 밝히기 위해 실시되었다. 본 연구에는 대학생 50명이 참가하였으며, 실험은 세종특별자치시에 위치한 금강수목원의 잣나무림에서 진행되었다. 임분구조에 있어서 입목밀도는 간벌 후 입목본수 기준의 “80%”와 “120%”로 설정하였으며, 지하고는 역황금비율(수관부:지하고=6:4)을 기준으로 “저”와 “고”로 설정하였다. 온열환경 지표는 예상 평균한서감 지수(PMV)와 예상불만족률(PPD)을 사용하였으며, 인체의 생리반응 지표는 심박변이도(HRV)를 사용하였다. 측정 결과, 입목밀도가 120%(PMV:-0.3±1.5, PPD: 47.5±24.6)인 잣나무림은 80%(PMV: 0.3±1.7, PPD:49.9±30.7)인 잣나무림보다 열적으로 쾌적했다(PMV, PPD: P<0.01). 또한 입목밀도가 120%(HF:687.3±734.1msec2, LF/HF: 2.1±2.6msec2)인 잣나무림은 80%(HF: 557.3±570.3msec2, LF/HF: 2.7±4.1msec2)인잣나무림보다 생리적으로 안정적이었다(HF, LF/HF: P<0.01). 한편, 지하고의 높이에 따른 온열환경과 인체 생리반응은 유의한 차가 없었다. 입목밀도와 지하고가 온열환경에 미치는 상호작용효과를 검증하기 위해 이원분산분석을 실시한 결과, 입목밀도와 지하고의 상호작용은 없다는 것을 알 수 있었다. 또한 입목밀도는 온열환경에 영향을 미치지만( P<0.01), 지하고는 온열환경에 영향을 미치지 않는다는 것을 알 수 있었다. This study is carried out to stand structure of Pinus koraiensis forests impact on the thermal environment and physiological responses. 50 university students participated in this study, the experiment conducted in Pinus koraiensis forest at Kumgang Arboretum. In terms of stand structure, stand density was set "80%" and "120%" based on stand density after thinning, clearlength was set as "low" and "high" based on the inverse golden ratio(crown: clearlength= 6:4). Thermal environment index used estimated Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied(PPD), and physiological response index used a heart rate variability(HRV). The result of measurement, stand density 120%(PMV: -0.3±1.5, PPD: 47.5±24.6) was thermally more comfortable than 80%(PMV: 0.3±1.7, PPD: 49.9±30.7, P<0.01). Stand density 120%(HF: 687.3±734.1msec2, LF/HF: 2.1±2.6msec2) was more relaxing states than 80%(HF: 557.3±570.3msec2, LF/HF: 2.7±4.1msec2, P<0.01). Meanwhile, thermal environment and physiological responses body has no significant difference according to height of clearlength. In order to verify the correlation effect that stand density and clearlength impact on thermal environment, two-way ANOVA is carried out and its result reveals that there is no correlation effect between stand density and clearlength. In addition, stand density affects the thermal environment ( P<0.01), but cearlength does not affect the thermal environment.