언양-밀양 간 국도24호선 석남고개 주변부 절토사면 지반특성

김승현,구호본,이종현,김승희,Kim. Seung-Hyun,Koo. Ho-Bon,Rhee. Jong-Hyun,Kim. Seung-Hee,Kim. Jin-Hwan,Son. Young-Jin 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1

울산광역시 울주군 상북면에서 경상남도 밀양시 산내면을 잇는 국도 24호선은 왕복 2차선으로 기존 도로의 선형이 매우 불량하고, 위험절토사면이 집중적으로 분포되어 있다. 2002년에는 관련기관과의 연계로 울주-밀양 간 국도 24호선의 도로절토사면에 대한 현황조사가 실시되었으며, 그 중 57개소 현장은 위험절토사면으로 분류하여 추가적인 상세 현장조사가 실시되었으며, 불연속면의 방향에 관한 다양한 정보들이 취득되었다. 2002년에는 관련기관과의 연계로 울주-밀양 간 국도 24호선의 도로절토사면에 대한 현황조사가 실시되었으며, 그 중 57개소 현장은 위험절토사면으로 분류하여 추가적인 상세 현장조사가 실시되었으며, 불연속면의 방향에 관한 다양한 정보들이 되었으며, 이에 대한 길이별, 경사별 분포현황, 불연속면 발달상태 등 여러제반 특성을 살펴 보았다. National Road No.24 connects Ulju-gun in Ulsan Metropolitan City and Milyang city in south Gyongsang Province. The width of the road is small and narrow and many of the dangerous cut slopes are distributed along the way. In 2002, the government officer carried on the brief exploration about road cut slopes, and KICT conduct a detailed additionally investigations 57 dangerous cut slope sites of them. We gained a variety of information of the each slope such as length, slope, discontinuites et al.

뇌 혈관의 아급성 색전증을 동반한 중증 난소과자극 증후군 1례

김승현,강경화,양윤석,황인택,박준숙,김정현,김진섭,Kim, Seung-Hyun,Kang, Kyoung-Hwa,Yang, Yun-Seok,Hwang, In-Taek,Park, Jun-Suk,Kim, Jeong-Hyun,Kim, Jin-Sub 대한생식의학회 2008 Clinical and Experimental Reproductive Medicine Vol.35 No.2

난소과자극 증후군 (Ovarian Hyperstimulation, OHSS)은 배란 유도의 가장 심각한 합병증 중의 하나로서 난소 비대, 복수, 흉수, 심막 삼출액, 혈액 농축, 전해질 이상 및 혈전증 등의 증상을 초래하는 것으로 알려져 있다. 특히 난소과자극 증후군 환자에서 혈전 색전증의 발생은 적절한 치료에도 불구하고 발생하고 예측이 어렵고 환자를 사망에 이르게 할 수도 있기에 가장 위험한 합병증 중의 하나로 인식되고 있다. 저자들은 체외수정 시술 후 중증 난소과자극 증후군 환자에서 본원 입원 치료 중 합병된 색전증에 대한 증례를 경험하였기에 보고하는 바이다. Ovarian hyperstimuation syndrome (OHSS) is the most serious complication of controlled ovarian stimulation. It causes symptoms such as, ovarian enlargement, ascites, pleural effusion, pericardial effusion, hemoconcentration, electrolyte imbalance, and thromboembolism. Although proper management is done, thromboembolism could occur and is difficult to predict. Moreover it can cause death. Consequently thromboembolism is the most dangerous complication of OHSS. We experienced a OHSS patient with thromboembolism of the brain after having IVF-ET.

강변여과에서 파일럿규모 수평집수관의 수두분포 연구

정재민(Jae Min Jeong),박재영(Jae Young Park),이종진(Jong Jin Lee),김용운(Yong Woon Kim),김승현(Seung Hyun Kim) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.5

강변여과용 수평집수관을 모사하는 파일럿 규모의 모래통 실험을 수행하였으며, 다양한 출구유속에 대한 수평집수관에서의 수두분포를 구하였다. Kim24)이 수행한 실험실 규모의 수평집수관에서의 손실수두에 Kim25)이 개발한 이론 즉, 작은 규모의 수평집수관에서의 손실수두로부터 큰 집수관의 손실수두를 계산하는 방법을 적용하여 본 연구의 관측치와 비교함으로써 Kim25)의 이론이 타당함을 알 수 있었다. 또한, 이들의 이론을 적용하여 본 연구에서의 관측치로부터 실규모 집수관에서의 수두분포를 구하는 방안을 예를 들어 설명함으로써 강변여과의 수평집수관 설계방법을 제시하였다. A pilot-scale sand-box experiment simulating a lateral of collector well used in riverbank filtration was performed, and hydraulic head distributions along the lateral were measured according to the various drawdowns at the well. The results of this experiment were compared to the predicted values obtained using a theory previously developed by Kim25) in order for its validation. This theory predicts the head loss in a large-scale lateral given the loss in a small-scale one, and to have actual values for comparison, the results from a lab-scale experiment previously performed by Kim24) were employed. Comparing the experimental values to the extrapolated value indeed confirmed the validity of the theory. A procedure to determine the hydraulic head distribution of a practical-scale lateral was also presented applying the theory to the experimental result of this study in an effort to show the process of lateral design for riverbank filtration.

고에너지배관 파단위치에 따른 배관휩과 충격파의 영향 평가

김승현,장윤석,최청열,김원태,Kim, Seung Hyun,Chang, Yoon-Suk,Choi, Choengryul,Kim, Won Tae 한국압력기기공학회 2017 한국압력기기공학회 논문집 Vol.13 No.1

When a sudden rupture occurs in high energy lines, ejection of inner fluid with high temperature and pressure causes blast wave as well as thrust forces on the ruptured pipe itself. The present study is to examine pipe whip behaviors and blast wave phenomena under postulated pipe break conditions. In this context, typical numerical models were generated by taking a MSL (Main Steam Line) piping, a steam generator and containment building. Subsequently, numerical analyses were carried out by changing break locations; one is pipe whip analyses to assess displacements and stresses of the broken pipe due to the thrust force. The other is blast wave analyses to evaluate the broken pipe due to the blast wave by considering the pipe whip. As a result, the stress value of the steam generator increased by about 7~21% and von Mises stress of steam generator outlet nozzle exceeded the yield strength of the material. In the displacement results, rapid movement of pipe occurred at 0.1 sec due to the blast wave, and the maximum displacement increased by about 2~9%.

난독증을 주소로 내원한 한국인 환자들의 임상양상: 얼렌증후군과의 연관성

김승현,조윤애,Seung-Hyun Kim,Yoonae A Cho 대한안과학회 2010 대한안과학회지 Vol.51 No.12

Purpose: To evaluate the main symptoms and associated ocular diseases in patients with dyslexia (reading difficulty) in Korean subjects. Methods: A total of 16 patients were enrolled in the present study. Eleven of the patients with Meares-Irlen syndrome whose symptoms improved with tinted lenses comprised Group 1. The other 5 patients whose reading difficulty improved with other ocular therapy and did not require tinted lenses comprised Group 2. The main symptoms causing dyslexia and associated ocular diseases were evaluated. Results: The mean age was 18.9 ± 8.9 years in Group 1, and 20.4 ± 12.3 years in Group 2. In Group 1, the most common symptoms while reading were doubling (72%), difficulty to move lines (46%), letter reversal (27%) and blurring or ocular pain (27%). On the other hand, blurring (100%) with fatigue or pain (20%) was documented in Group 2. The associated ocular diseases in Group 1 and Group 2 were refractive error (63% and 20%), dry eye (18% and 60%), and exophoria (18% and 60%), respectively. Conclusions: Doubling and difficulty to move lines while reading were the main specific symptoms in Meares-Irlen syndrome in the present study. Refractive error, dry eye, and exophoria were commonly associated in patients with dyslexia. J Korean Ophthalmol Soc 2010;51(12):1639-1642

Leptin의 신경생물학 : 섭식의 신경내분비 조절

김승현,조숙행,Kim, Seung-Hyun,Joe, Sook-Haeng 한국정신신체의학회 1999 정신신체의학 Vol.7 No.2

인간은 에너지 섭취와 소모에 있어 변동이 심한 편이지만 비교적 일정한 체중을 유지하고 적절하게 섭식행동을 조절한다. 그러나 이러한 조절기전에 문제가 발생하면 비만이나 그 이외의 다른 섭식장애를 일으키게 되며 다양한 후유증을 야기한다. 본 논문에서는 최근에 소개되기 시작한 호르몬인 leptin이 섭식의 조절과 에너지의 항상성을 조절하는데 있어 어떻게 중요한 작용을 하게되는지 조사하여 주로 정신과 영역에서 관심을 기울일 만한 부분에 대해 고찰하고자 한다. Leptin이 처음 발견되었을 때 그 역할은 주로 음식의 섭취를 제한하고 에너지의 소모를 증가시키는 호르몬으로 소개되었지만, 점차 그 이외의 다른 신체 기능 즉, 생식주기나 신경대분기계에도 영향을 미치는 것으로 보고되면서 정선과 영역에서 차지하는 비중도 확대되고 있다. 그러나 leptin의 작용기전은 매우 복잡하며 많은 부분이 아직도 불분명한 상태에 있다. 이에 저자들은 중추신경계에서 현재까지 알려진 leptin의 작용기전에 대해 살펴보고 섭식과 관련된 그 밖의 다른 신경전달물질들과의 상호작용 그리고 섭식장애와의 관련성에 대해서 최근 문헌들을 조사하여 함께 고찰하고자 한다. Food intake and body weight are determined by a complex interaction of regulatory pathways. Leptin, the product of the ob gene, is a recently discovered hormone secreted by adipocytes, that signals the amount of adipose tissue energy stores to the brain and exerts major effects on energy homeostasis and neuroendocrine function. In addition, leptin has recently been shown to affect reproductive function in rodents and humans. The study of leptin and its effectors in the hypothalamus may provide important insights with respect to the interplay of several hypothalamic neuropeptides in regulating feeding as well as the interaction of genetics and environment in the regulation of energy homeostasis. In this review we summarise the action of leptin in the regulation of food intake and highlight a working model of the effects of environmental factors on the leptin system.

DITI를 이용한 월경통 여성의 좌우 복부온도 비교

김승현,안수정,조정훈,장준복,이경섭,Kim, Seung-Hyun,Ahn, Soo-Jeong,Cho, Jung-Hoon,Jang, Jun-Bock,Lee, Kyung-Sub 대한한방체열의학회 2003 대한한방체열의학회지 Vol.2 No.1

Purpose: We aim to research the difference of abdominal temperature in dysmenorrhea patients comparing with that of normal person. Metholds: We selected the 49 dismenorrhea patients as study group and 54 normal persons as control group, excluding the patients who have dermatitis, ared over 70 or under 10. and have extreme obesity. We compared the 4 points(Rt and Lt Gimun(LR14) and Guirae(ST29)) in thd abdomen of both group, check the temperature of those points with DITI(Dorex, DTI-16UTI) to compare the temperature difference with each other. For statistics, we use independent T-test, SPSS 8.0 for windows. Results: The temperature difference between Rt and Lt Gimun which are in upper abdomen shows statistically significant result in study group. Conclusion: The dysmenorrhea patients show larger temperature difference between Rt and Lt points in upper abdomen than normal persons. In lower abdomen, the temperature between control and study group shows little difference.

빅데이터 환경에서 분석 자원이 기업 성과에 미치는 영향

김승현,박주석,박재홍,김인현,Kim, Seung-Hyun,Park, Jooseok,Park, Jea-Hong,Kim, Inhyun 한국빅데이터학회 2016 한국빅데이터학회 학회지 Vol.1 No.1

정보기술 발전은 기업이 보유하고 있는 다양한 구조 및 비구조 데이터를 관리할 수 있게 하였다. 이러한 빅데이터 활용은 기업의 새로운 비즈니스 핵심가치로 평가 받고 있다. 본 연구에서는 빅데이터로 인해 더욱 중요하게 평가받는 데이터 자원이 기업 분석 활용에 미치는 영향을 연구하고자 한다. 최신 해외 보고서들을 살펴보면, 빅데이터 활용성과에 대한 실증 연구를 보여주고 있다. 이러한 해외 실증 연구와 비교하여 국내 기업의 빅데이터 활용 특성을 분석하고자 한다. 본 연구 결과는 향후 빅데이터 활용 기업에 적용 가능한 성숙모형 개발에 도움을 줄 수 있을 것이다. With the rapid development of information technology, we can manage not only structured data but also unstructured data. Big data environments drive new business values. This study examines the effect of analytic resources to business performance under big data environments. Recent worldwide reports showed empirical performance results of big data applications. Compared to these reports, we attempt to analyze resources of big data applications to companies in Korea. This study results in current status of big data use in Korea. and will help to develop a maturity model of big data applications.

가림치료에 반응하지 않는 난치성 약시에서 도파민 약물치료의 효과

김승현,신형호,고성범,조윤애,Seung Hyun Kim,Hyoung Ho Shin,Seong Bum Koh,Yoonae A,Cho 대한안과학회 2006 대한안과학회지 Vol.47 No.3

Purpose: This study was undertaken to evaluate the effect of L-dopa in amblyopic children for whom occlusion treatment failed. Methods: We studied nine amblyopic children (11 eyes) for whom part-time occlusion (4~8 hours/day) treatment for a minimum period of 6 months had failed. The types of amblyopia included: anisometropic (1 patient, 1 eye), stimulus deprivation (4 patients, 6 eyes) and mixed (anisometropic and strabismic: 2 patients, 2 eyes; anisometropic and organic: 2 patients, 2 eyes). Best corrected visual acuity before treatment was between 0.05 and 0.5. They received, with full informed consent of the parent, levodopa (2~4 mg/kg) for 8 weeks combined with part-time occlusion. Results: The children were between 4 and 11 years old (mean 5.8±2.05). Of the subjects, 45.5% (4 patients, 5 eyes) had improved visual acuity after 8 weeks of treatment. In one patient with anisometropic, two patients with mixed (anisometropic and strabismic), and one patient with stimulus deprivation (ametropic) amblyopia, visual acuity improved by one to five lines. Conclusions: In anisometropic, strabismic amblyopes and mild deprivational amblyopes for whom occlusion treatment failed, L-dopa improved visual acuity. L-dopa may be an additional option for treatment of amblyopic patients with a guarded visual prognosis.

정신분열증환자에서 Haloperidol 투여에 따른 임상효과와 혈장 Homovanillic Acid의 농도 및 혈장 5-Hydroxyindoleacetic Acid 농도와의 관계

김승현,이민수,곽동일,Kim, Seung Hyun,Lee, Min Soo,Kwak, Dong Il 대한생물정신의학회 1995 생물정신의학 Vol.2 No.1

The Purposes of this study were to examine plasma homovanillic acid(pHVA) levels and 5-hydroxyindoleacetic acid(pHIAA) levels in schizophrenics during haloperidol treatment, and to assess the association of pHVA and pHIM levels with their psychopathology and treatment responses. Fourteen patients entered the study and pHVA, pHIAA levels were measured at baseline, first week, second week and fourth week during treatment. Also, plasma haloperidol levels were measured at first week, second week and fourth week. Psychopathology was evaluated with Brief Psychiatric Rating Scale(BPRS) at baseline, 1st week, 2nd week and 4th week. 1) There were significant differences on the duration of illness and total BPRS scores at baseline between higher pHVA group(baseline pHVA level >7.72ng/mL) and lower pHVA group(baseline pHVA level <7.72ng/mL). 2) There was no significant difference on the duration of illness between higher pHIM group(baseline pHIAA level >3.18ng/mL). and lower pHIAA group(baseline pHIAA level <3.18ng/mL). 3) The Means of pHVA levels at 1 st week and 2nd week after treatment decreased significantly in the higher pHVA group and did not change in the lower pHVA group. 4) In the higher pHIAA group, the mean of pHIAA levels at 4th week after treatment decreased significantly, but did not change in the lower pHIAA group. 5) Between the higher pHIVA group and lower pHVA group, the response rates(percentile improvement) after treatment were not different from each other, but there was significant difference on the response rate between the lower pHIAA group and higher pHIM group at 2nd week. 6) There was significant correlation between total BPRS scores and pHVA levels in the higher pHVA group during treatment. The results suggest that repeated measurement of pHVA levels and pHIAA levels following antipsychotic treatment have prognostic significance for response. Also, shcizophrenics whose have relatively nigh levels of pHVA, or relatively low levels of pHIAA before treatment will show a favorable early responses to antipsychotics.