노인에 있어서 시력 상실의 흔한 원인

申正澈,高明圭 대한의사협회 2000 대한의사협회지 Vol.43 No.4

Ni-Ti 形狀記憶合金의 變態溫度와 回復擧動에 미치는 熱處理의 影響

申明徹,李龍鎬,金英宰 弘益大學校 1985 弘大論叢 Vol.17 No.2

There are many problems to be solved for more wide practical applications of Ni-Ti Shape Memory Alloys. In this point of view, it was studied to observe the effects of heat-treatment on transformation temperature and recovery behavior of Ni-Ti shape memory alloy in the temperature range of 300℃ to 800℃. Two compositions of 54.9w/o Ni-Ti and 54.4 w/o Ni-Ti were studied in this research. To clarify the effects of heat-treatment on transformation temperature and recovery behavior of Ni-Ti shape memory alloy, Transmission Electron Microscope and Differential Thermal Analysis, Electrical Resistivity technique were employed. The results of this research were as follows: (1) Transformation temperature was decreased with lower annealing temperature below 600℃ and more amount of deformation prior to annealing. (2) In case of annealing above 600℃, transformation temperature depends on only composition and memory properties are not so good. (3) The best annealing temperature for memory properties proved to be around 400℃. (4) In this annealing temperature, the elastic which is lowest and residual deformation has not remained. (5) The width of the twin plate was decreased with increase of the heat treatment temperature.

급성 심근경색 초기에 도플러 심초음파를 이용한 좌심실 이완기 기능의 평가

신원용,김주성,김철현,이광희,최태명,현민수,김성구,권영주 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1

Background : Congestive heart failure after acute myocardial infarction relate to left ventricular systolic sysfunction. Also, left ventricular diastolic function contribute to heart failure. The aims of this study were, firstly to characterize left ventricular diastolic function by transmitral flow velocity, and secondly to study the significance of Doppler measurements in relation to the development of heart failure in the early phase of myocardial infarction. Method : Pulsed Doppler echocardiography of transmitral flow was assessed in 34 patients with acute myocardial infarction. According to the Doppler transmitral flwo velocity profile, the study patients were assigned to the three groups: normal filling pattern (DT > 140ms, IVRT < 100ms), relaxation abnormality (DT > 140ms, IVRT ≥ 100ms), pseudonormal or restrictive pattern (DT ≤ 140ms). Also, on the basis of the presence of heart failure during first week of hospitalization, the patients were divided into two groups: patients with no sign of heart failure (Killip class Ⅰ) and heart failure (Killip class Ⅱ-Ⅳ). Results : Of the 34 patients studied, 10(29%) were normal filling pattern, 17(50%) abnormal relaxation and 7(21%) were restrictive patterns. The left ventricular ejection fraction(EF, 40 ±6%) of restrictive pattern was significantly lower than that of normal filling pattern of abnormal relaxation(p < 0.01). And, the IVRT, DT, E/A and left ventricular EF were reduced in patients with heart failure(14 patients) compared to no sign of heart failure(20 patients)(p<0.05). Of the patients with heart failure, IVRT and left ventricular EF were reduced in patients with DT≤140 ms compared to DT> 140ms(p=0.001). Conclusion : Left ventricular diastolic dysfunction is present early after onset of symptoms of acute myocardial infarction. Assessment of left ventricular diastolic function complements measurements of systolic function in the evaluation of cardiac function. DT, IVRT, E/A and left ventricular EF are useful predictors for development of congestive heart failure following acute myocardial infarction.

강섬유를 이용한 RCS 보-기둥 접합부의 내진 거동에 관한 실험적 연구

김신호,양성철,박종원,정명채,이정원 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

This study develops the mixed structure joint which could improve the strength, deformation, and energy dissipation capacities compared to existing mixed structure joints. The type of joint developed in this study is called "the beam penetration joint" where the web of steel beam penetrate into the column confined by the concrete. This paper describes the cyclic test on the RC column-steel beam joint for investigating the hysteretic behavior of the joint. From this test its strength. stiffness and ductility capacity are discussed.

수술후 동통환자에 대한 Diclofenac Sodium㈜의 치료효과 및 안정성

문명상,하기용,신장철 최신의학사 1987 最新醫學 Vol.30 No.10

프로야구 손상의 임상적 분석

김철준,김명화,김미정,신명진,윤준오,김상규 대한스포츠의학회 1995 대한스포츠의학회지 Vol.13 No.1

Baseball is rapidly getting popularity in Korea as it has been in U.S.A and Japan. During the last decade, threre were several studies about baseball injuries which oriented mainly to the overuse injuries of growing baseball players. But there was no study the professional baseball players systematically. This study was surposed to see the general characteristics of baseball injuries and to provide the prevention and rehabilitation programs if recommended. The number of 83 injuries of 60 baseball players was analysed according to the position, injury site, diagnosis, injury mechanism and duration of injury. The mean age and height of 60 subjects were 24.6 years old and 180.65㎝, respectively. The baseball position of 82 injured cases were composed of 27 pitchers, 30 infielder, 19 outfielder and 6 catchers. The characteristics of injury were as follows: 1.The number of chronic injury was 56 cases(68.3%) and the percentage of chronic injury of pitchers was up to 81.5% compared 73.3% of infielder and 47.4% of outfielder. 2. The injury rate of both lower and upper extremitis were equal and the rate of lower back problems was the second, which should be concerned. 3. The number of cases injured by direct collison is as low as 15(18.3%). The most common secondary cause of injury was aggressive throwing itself and 26 out of 49 cases injured not by direct collision. 4. More concern should be payed about the low back problems and about the catcher and the field players as much as pitchers from now one.

흉통의 양상에 따라 분류한 불안정형 협심증 환자의 임상적 소견의 비교

김명수,김성구,정호석,온영근,신원용,김철현,최태명,현민수,권영주 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.1

Background and aims : The clinical syndrome unstable angina pectoris that encompasses a variety of symptoms and clincal presentations of transient episode of myocardial ischemia, was devided to several subgroups. Also, it has variable pathophysiologic factors to cause myocardial ischemia. According to clincal presentation, coronary angiographic finding and prognostic factor, the result of unstable angina pectoris is variable. In fact, there were a few data reported on the prognosis of wide spectrum of patients with unstable angina. However, the precise risk of subgroups according to classitication has not been established because it was difficult to compare between studies. We classified unstable angina pectoris by clinical nature of chest pain, and performed to establish and compare the clinical presentations, coronary angiographic findings, treatement and prognosis of patients with unstable angina within subgroups of classification. Methods : Retrospenctive data for 164 unstable angina pectoris patients admitted to the Internal Cardiology Division of Soon Chun Hyang University Hospital from May 1996 to July 1999 was analyzed. The patients were classified into one of the following categories: Class I, new onset of severe angina; Class II, acceleration of previous chronic stable angina; Class III, angina at rest. Clinical presentations, echocardiographic findings, coronary angiographic findings, treatment and prognosis were compared. Results : From the total 164 patients, the subjects of classes were as follows : Class I, 46 cases (28.1%); Class II, 74 cases (45.1%); Class III, 44 cases (26.8%). In view of age distribution, the 7th decade had the highest incidence, and then, 6th, 8th decades were followed. There was no baseline differences among the 3 classes with respect to gender, number of risk factors. Significantly, class II showed more severe findings in abnormal Q wave 15 cases (20.8%), total occclusive lesion 10 cases (20.8%) and three vessel coronary disease 11 cases (22.9%) than other classes. The change of ST segment was significantly apparent (p<0.02) among class I 28 cases (60.8%), class III 26 cases (59.0%), comparing with class II 30 cases (40.5%). Class III had the higher incidence of one vessel coronary artery disease than class I and III. The heparin treatment was performed in 99 cases (60.1%). The incidence of nonfatal myocardial infarction was much more in class I and III, each 4 cases (8.7%, 9.8%) than in class II 1 cases (1.4%). In-Hospital death was occurred in class I and II, each 1 case. Conclusion : The patients with the acclerated angina from chronic stable angina had more severe coronary artery disease than other classes, but they had better in-hospital prognosis.

Green lguana의 영양성 이차성 상피소체 기능항진증의 방사선진단

이영원,신상태,김명철,이재일 충남대학교 수의과대학 동물의과학연구소 2000 動物醫科學硏究誌 Vol.8 No.-

A four years old female Green Iguana (body weight : 0.85㎏) was admitted to the veterinary medical teaching hospital at Chungnam national university with soft tissue swelling of mandible and limb region and reluctance to move. On physical examination, the Green Iguana was depressed, and the swelling of soft tissue in the mandible region and fore & hind limb. Radiographs were obtained of both fore limbs and hind limbs. It was seen that the soft tissue swelling of fore and hind limb. Also cortical bone thinning of long bones in fore and hind limb was identified. Radiographic abnormalities of the skeleton include pathologic fractures in the left distal radius, right and ulna, both femur, tibia and fibula. A diagnosis of nutritional secondary hyperparathyroidism was made.

유아용 승용완구 디자인의 선행조건에 관한 연구

최병오,신명철 한국기초조형학회 2003 기초조형학연구 Vol.4 No.1

유아용 승용완구 디자인연구 과정에서 얻어진 구체적인 결론을 요약하면 다음과 같다. 첫째, 안전성-무독성의 재료를 사용하고 날카롭고 뾰족한 부분이 없어야 하며, 유아가 삼킬 수 있을 정도의 작은 크기의 부품이 없어야 한다. 둘째, 세척성-청결을 유지할 수 있도록 세척 가능한 재료를 사용해야 한다. 셋째, 내구성-쉽게 깨어지거나 변형되지 않는 재질을 사용해야 한다. 넷째, 매력적, 흥미성-유아의 호기심을 유발하여 놀이하고 싶은 마음이 들게 하고 놀이를 지속하고 싶은 마음이 들게 해야 하며 모양과 색상이 미적으로 아름다워야 한다. 또한 놀이 방법이 너무 단순하지 않고 다양한 방법으로 활용이 가능해야 한다. 다섯째, 조작성-세발 자전거의 크기와 무게가 유아가 조작하기에 적절하고, 조작방법이 복잡하지 않고 어렵지 않아야 한다. 여섯째, 교육적 기능-여러 가지 감각 경험을 제공하고, 탐색활동을 자극해야 한다. 일곱째, 경제성-가격이 너무 비싸지 않고 다양한 용도로 활용될 수 있어야 한다. This study summarizes the several conclusions in developing tricycle design as follows; First, Safety - The toys for infants should use nontoxic materials, have no sharp parts, and have no parts as small as infants may swallow them. Second, Washing - The toys for infants should use washable materials to maintain cleanliness. Third, Durability - The toys for infants should use the materials that are not easily broken of transformed. Fourth, Attraction & Curiosity - The toys for infants should induce infants to have curiosity for them and thereby make infants want to play with them continuously, and the toy's shape and color should be beautiful. In addition the play method should not be too simple and they should be utilized in various ways.Fifth, Operation - The size and weight of tricycle should be proper for infants to operate, and the operation method should not be too complicated or difficult. Sixth, Educational Function - The toys for infants should provide several senses' experience, simulate search activity and provide the opportunity of problem-solving, and stimulate their imagination and creatively. Seventh, Economical Efficiency - The toys for infants should not be too expensive and can be utilized in various uses.

Tourette 장애 소년에서 자기공명영상을 이용한 기저핵의 용적 분석

선우영경,신용범,이명지,김지영,배재남,강민희,김철응,이정섭 大韓神經精神醫學會 2008 신경정신의학 Vol.47 No.4

Objectives : The purpose of this study was to investigate the regional differences of the basal ganglia volume between the boy subjects who have Tourette's disorder and the control group who don't have this disorder by using Brain MRI. Methods : Sixteen subjects who were diagnosed as Tourette's disorder using DSM-IV criteria, and sixteen healthy subjects were selected. For analysis the coronal slice images of the basal ganglia were collected and collected MR images were analyzed with NIH Image (version 6.1 ppc). Resuls : The total brain volume in the subjects with Tourette's disorder were smaller than control group by 6.2% (F=6.2, d.f.=1, P=0.019). The right putamen volume in boys with Tourette's disorder were significant smaller than control group statistically (F=3.2, d.f.=3, P=0.040). The asymmetry (1eft>right) in the globus pallidus decreased significantly in the boys with Tourette's disorder (p=0.06) were found from this experiment. Conclusion : These findings suggest that boys with Tourette's disorder may have neuropathological abnormalities in the basal ganglia. Moreover, the present findings point out the important role of basal ganglia, especially putamen, in Patho-physiology of Tourette's disorder. More studies about the structural and functional analysis of the basal ganglia in Tourette's disorder are highly required.