비구개관낭종에 관한 X선학적 연구

전찬덕,이상래,황의환 大韓口腔顎顔面 放射線學會 1993 Imaging Science in Dentistry Vol.23 No.1

The purpose of this study was to evaluate the clinical and radiographic features of 35 cases of nasopalatine duct cyst by means of the analysis of periapical and/or occlusal radiograms in 35 persons visited the Department of Oral and Maxillofacial Radiology, School of Dentistry, Kyung Hee University and Chonbuk National University. The obtained results were as follows: 1. The incidence of nasopalatine duct cysts was higher in males(74.3%) than in females(25.7%). 2. The nasopalatine duct cysts were the most frequently occurred in the 4th decades(34.3%). The 6th and 7th decades(17.1%, 17.1%) were next in order to frequency followed by the 5th decades(14.3%), the 3rd decades(8.6%), the 2nd decades(5.7%), and 8th decades(2.9%). 3. In the signs and symptoms of nasoplatine duct cysts, 25.7% were swelling, 17.1% were swelling and tenderness, 20.0% were swelling and pain, and 37.2% were a symptom. 4. In the shape of nasopalatine duct cysts, 40.0% were round type, 48.6% were oval type, and 11.8% were heart type, In symmetry of the nasopalatine duct cysts to the median palatine surture, 85.7% were symmetry, 14.3% were asymmetry. 5. In the width of nasopalatine duct cysts, 11.4% were 6-10mm, 48.6% were 11-20mm, 25.7% were 21-30mm, and 14.3% were 31-40mm. 6. In the periphery of nasopalatine duct cysts., 82.9% were distinct, 17.1% were relatively distinct. 7. In the change of root, 51.5% were intact, 17.1% were root divergence, 20.0% were root resorption, and 11.4% were root divergence and resorption.

방사선조사와 저칼슘식이가 성장기 백서의 치주조직에 미치는 영향에 관한 실험적 연구

이상래,황의환,전찬덕 大韓口腔顎顔面 放射線學會 1998 Imaging Science in Dentistry Vol.28 No.1

The present study was designed to elucidate the effects of the Co-60 ?? irradiation and/or calcium-deficient diet on the periodontal tissue formation in rat pups. The pregnant three-week old Sprague-Dawley rats were used for the study. The experimental group was divided into two groups, irradiation/normal diet group(Group 2) an irradiation/calcium-deficient diet group(Group 3). The control group was non-irradiation/normal diet group(Group 1). The abdomen of the rats at the 19th day of pregnancy were irradiated with single absorbed dose of 350 cGy. The rat pups were sacrificed on the 14th day after delivery, and the maxillae including molar tooth germ were taken. The specimens including the 1st molar tooth germ were prepared to make tissue sections for light and transmission electron microscopy. Some of tissue sections for light microscopy were stained immunohistochemically with anti-fibronectin and anti-osteonectin antibodies. The results were as follows; 1. In the periodontal ligament forming area, the fibroblasts of Group 2 showed irregular arrangement and low activity. The immunoreactivity between the fibroblasts and collagen fibers was decreased, compared with Group 1. The fibroblasts of Group 3 showed atrophic change and clumped nucleus. The collagen fibers showed cystic change and low immunoreactivity to the fibronectin. 2. In the cementum forming area, the cementoblasts of Group 2 showed decrease of number and atrophic change. The cementoblasts of Group 3 showed edematous change, atrophy of cytoplasm, and clumping of nucleus. 3. In the alveolar bone forming area, the bone of Group 2 was thin and various degree of immunoreactivity to the osteonectin. Group 3 showed edematous osteoblasts, fibrous degeneration of bone marrow, and weak immunoreactivity to the osteonectin.

전력전자 PSPICE 컴퓨터 시뮬레이션을 위한 스위치 모델

元忠淵,金淵俊,金世燦,金德憲 成均館大學校 科學技術硏究所 1990 論文集 Vol.41 No.2

PSPICE is widely used in analysis of general circuit and simulation in electric and electrical field is applied to power electronics circuit. The circuits used with thyristors will add significant complexity to PSPICE analysis, it is important that the thyristor model be as simple as possible. In order to solve this problem, an ideal voltage controlled switch and an ideal current controlled switch were added as circuit elements. Two typical power electronics circuits simulation using PSPICE program presented.

지질조건에 따른 자연사면 토층의 투수계수 산정모델 제안

전덕찬 ( Duk Chan Jun ),송영석 ( Young Suk Song ),한신인 ( Shin In Han ) 대한지질공학회 2010 지질공학 Vol.20 No.1

본 연구에서는 10여년 동안 국내 산사태 발생지역 및 인근 미발생지역에서 채취된 자연사면에서의 토층을 대상으로 획득된 약 1,150여개소의 토질시험결과를 토대로 지질조건에 따른 토층의 평균 물성치를 산정하고, 통계적인 분석을 실시하여 지질조건별 투수계수에 대한 간편식을 제안하였다. 투수계수는 화강암지역과 이암지역에서 큰 것으로 나타났으며, 세립토함유량은 이암지역과 편마암지역에서 큰 것으로 나타났다. 지질조건에 따른 토층의 투수계수를 산정하기 위해서 상관성 분석을 실시한 결과 종속변수를 투수계수로 하고 독립변수를 세립토함유량, 함수비, 건조단위중량 및 간극비로 선정하였다. 회귀분석결과 지질조건별 제안된 선형회귀식에서는 공통적으로 세립토함유량 및 간극비가 가장 많이 포함되었다. 제안된 선형회귀식을 검증하기 위하여 타 지역의 토층을 대상으로 수행된 투수계수 측정결과와 선형회귀식으로 예측된 결과를 서로 비교하였다. 비교결과 일부 측정된 결과와 예측된 결과가 차이가 있는 것으로 나타났으나, 그 차이는 비교적 작은 것으로 나타났다. 본 연구에서 제안된 지질조건별 투수계수 산정을 위한 선형회귀식은 국내 지반을 대상으로 적용이 가능할 것으로 판단되나, 추후 지속적인 검증 및 수정이 필요할 것으로 판단된다. The soil tests have been performed on the specimens obtained from about 1,150 sites including landslides and non-landslides areas in natural terrains for last 10 years. Based on the results of those tests, the average soil properties are estimated and the simple equations for estimating permeability are proposed according to geologic conditions. The average permeability in Granite and Mudstone sites is higher than other sites and the content of silt and clay in Mudstone and Gneiss sites is higher than other sites. The correlation analysis and the regression analysis were performed to estimate the coefficient of permeability according to geological conditions. As the result of the correlation analysis, the coefficient of permeability is selected as a dependent variable, and the silt and clay contents, the water contents and the dry unit weights are selected as independent variables. As the result of the regression analysis, the silt and clay contents and the void ratio were involved commonly in the linear regression equations according to geological conditions. To verify the proposed the linear regression equations, the measured result of the coefficient of permeability at other sites was compared with the result predicted with the proposed equations. As the result of comparison, there were a little bit different between them for some data. However the difference was relatively small. Therefore, the linear regression equations for estimating the coefficient of permeability according to geological conditions may be applied to Korean soils. However, these equations should be verified and corrected continuously to improve the accuracy.

POSTER PRESENTATION 2: Cardiac/Geriatric/Pediatric Emergency : PS2-2 ; A Case of Gastric Volvuls Presenting as Recurrent Vomiting of a Child

( Jun Won Son ),( Chan Young Koh ),( Kab Duk Kim ),( Seong Bum Oh ),( Han Joo Choi ),( Il Kuk Choi ),( Min Jung Kim ) 대한응급의학회 2014 대한응급의학회 학술대회초록집 Vol.2014 No.2

gastric volvulus is very rare disease but the symptom is ambiguous, so easily misdiagnosed by acute gastroenteritis. Because of the fatal result about late diagnosis of gastric volvulus, this these is very important to pediatric emergency department. We reported the case of gastric volvulus in child who suffered from recurrent vomiting and abdominal distension, and he was relieved by surgical intervention after diagnosed acute gastric volvolus. A child who had no history of any other disease visited in ED for recurrent vomiting, abdominal pain about three days, nevertheless hydration in local pediatrics. He had alert mentality and complained of diffuse abdominal pain. When he visited, blood pressure is 116/68mmHg, heart rate is 118/min, respiratory rate is 26/min, and body temperature is 37.1°C. In physical examination, abdomen was soft but distended, bowel sound was decreased, tenderness on RUQ, RLQ area but no rebound tenderness, and tympanic sound in percussion.laboratory test was with in normal range. The simple chest & abdomen X-ray was shown severe gastric dilation. We suspected gastric volvulus by abdominal ultrasound, it showed narrowed gastric pylorus like bird beak-shape. Finally we diagnosed the mesenteric axis type of gastric volvulus by upper gastro-intestinal series. we consulted pediatric surgery and laparoscopic gastropexy was done. After three days later, gastric distension and abdominal pain was relieved. Six days later, he had defecation and started oral intake and discharged at seven post-operation date without any complications. There are many pediatric patients in emergency department who have suffered from vomiting and abdominal pain, but generally laboratory test is normal and their symptom is improved, we often discharge that child after conservative treatment. However, the pediatric patient complains of recurrent abdominal pain or vomiting after conservative treatment, we recommend it needs further evaluation for the exact diagnosis among many diseases including gastric volvulus.

OCR 기술을 활용한 점자 번역기

장찬희 ( Chan-hee Jang ),김덕원 ( Duk-woen Kim ),장준기 ( Jun-ki Jang ),조준희 ( Jun-hee Jo ),박현주 ( Park Hyun Joo ),김중재 ( Kim Joong Jae ) 한국정보처리학회 2019 한국정보처리학회 학술대회논문집 Vol.26 No.2

본 시스템은 시각 장애인들이 일반 책을 점자책처럼 읽을 수 있도록 페이지를 스캔해서 점자(점각)를 표현하는 기기이다. 카메라 모듈로 페이지를 스캔하면 프로그램은 페이지 위의 글자를 인식해 해석하고 이를 점자로 번역한다. 번역된 점자는 솔레노이드 모터를 통해 실제 시각 장애인이 읽을 수 있도록 점자를 표현한다.

The Effect of Annealing Temperature on the CL Properties of Sol-Gel Derived Y[sub 2]O[sub 3]:Re (Re=Eu[sup 3+],Tb[sup 3+],Tm[sup 3+]) Phosphors

Cho, Jun Yeol,Huh, Young-Duk,Park, Chan Ryang,Do, Young Rag The Electrochemical Society 2007 Journal of the Electrochemical Society Vol.154 No.9

HLA 일배체 부적합 혈연관계 생체 신이식에서 공여자 연령이 이식신 및 환자 생존율에 미치는 영향

김준홍(Jun Hong Kim),김찬덕(Chan Duk Kim),김석재(Seog Jae Kim),백미영(Mi Young Baek),권태환(Tae Hwan Kwon),김용림(Yong Lim Kim),조동규(Dong Kyu Cho),김영욱(Young Wook Kim),권태균(Tae Gyun Kwon),장세국(Sae Kook Chang) 대한내과학회 1998 대한내과학회지 Vol.54 No.3

Objectives: Renal transplantation has become the therapy of choice for patients suffering from end-stage renal disease. But because of progressive disparity between the number of patients in needs of a transplant and the number of ideal kidneys available for transplantation, increasing numbers of kidneys are recovered for transplantation from donors that are not considered ideal, especially from donors over the age of 55. In country such as Korea, the number of cadaveric transplants is limited due to cultural and religious prejudices of the population, poor legal definition and deficient organization of cadaveric donor work-up. Therefore the main source is living related donors(LRD), especially the parent. But in Korea, there is few reports about the influence of donor age on outcome in living related kidney transplantation. Thus we performed this study to estimate the influence of donor age in itself on the outcome of the one HLA-haplotype mismatched living related kidney transplantation. Methods: The effect of donor age on the outcome of One HLA-haplotype mismatched living related kidney transplantation was studied in 71 recipients who under- went kidney transplantation from January 1981 to March 1995. The outcomes of 25 recipients from the older age group(?55 years: Group A) and 46 recipients from the younger age group(<55 years: Group B) were retrospectively reviewed. Patient death with a functioning graft was considered graft loss. Results: Demographic characteristics between 2 groups were similar, The 1-year and 3-year patient survival rates in recipients(group A and B) were similar regardless of donor age(96.0% and 90.8% vs.97.4% and 90.3%, respectively). The 1-year and 3-year graft survival rates in recipients(group A and B) were not significantly different (91.4% and 63.9% vs 92.7% and 79.3%, respectively). The mean levels of serum creatinine at discharge were significantly higher in group A. Short-term and intermediate-term renal function, as assessed by serum creatinine, was inferior in the group A throughout the follow-up periods of 3 years. The causes of graft loss in the first 3 years after transplantation were irreversible rejection(71%) and the patient death with functioning graft(29%) in group A, while the causes of graft loss in group B were irreversible rejection(50%), patient death with a functioning graft(40%) and technical reason(10%). Conclusion: These results of our analysis suggest that similar outcome can be achieved after living related renal transplantation from older donor. Therefore the kidneys may be used from donors over 55 years old on condition that the donors undergo complete and exhaustive work-up.

안면인식을 이용한 운동 보조 시스템

최덕규(Duk-Kyu Choi),이승민(Seung-Min Lee),박찬현(Chan-Hyun Park),박진규(Jin-Kyu Park),최우성(Woo-Seong Choi),황준성(Jun-Seong Hwang),이승호(Seung-Ho Lee) 한국컴퓨터정보학회 2023 한국컴퓨터정보학회 학술발표논문집 Vol.31 No.2

논문 : 지진해일 시나리오 DB 구축방안

이덕기 ( Duk Kee Lee ),류용규 ( Yong Gyu Ryoo ),양준모 ( Jun Mo Yang ),김수경 ( Su Kyung Kim ),윤용훈 ( Young Hoon Youn ),이전희 ( Jun Hee Lee ),박종찬 ( Jong Chan Park ) 대한지구물리학회 2005 지구물리 Vol.8 No.2