한국형 인공심장 내의 혈류에 대한 수치해석적 연구

심은보,박명수,여종영,고형종,박찬영,민병구 제주대학교 인공심장이식연구소 2001 인공심장 연구 Vol.2 No.1

한국형 인공심장 내의 혈액 유동을 유한요소 코드인 ADINA를 사용하여 수치적으로 조사하였다. 그 동안 많은 실험을 통해서 밝혀진 중요한 문제점들 중의 하나는 바로 혈전 생성이다. 이것은 혈액 주머니내의 작용하는 과도한 높은 전단응력 또는 정체 영역과 밀접한 관련이 있다. 한국형 인공심장 내의 혈류는 액추에이터와 혈액주머니, 그리고 혈액의 상호작용에 의하여 정의될 수 있다. 여기에서 혈액은 비압축성, 뉴우턴 유체로 가정하였으며, 혈액주머니는 등방성 선형 고체재질로 가정하였다. 2차원 모델은 액추에이터와 혈액 주머니 사이의 접측 문제 및 고체-유체 상호작용 문제를 전부 고려하였다. 3차원 모델에서는 액추에이터에 의한 변형을 접촉문제를 혈액주머니 외부에 작용하는 압력조건으로 단순화하였다. 2차원 모델 계산결과에 의하면, 입구 및 출구 부근, 그리고 모서리 부근에서 전단응력의 세기가 매우 크다는 것을 발견할 수 있었다. 또한 위쪽 돌출부에서 속도가 매우 느려지는 정체 영역이 형성되었으며, 이는 실험에서 관찰된 혈전 생성영역과 거의 일치한다. 3차원 계산의 경우에도 역시 입구와 출구 부분에서 재순환 영역이 발견되었으며, 수축시에는 입구의 아래쪽에서, 이완시에는 출구의 아래쪽에서 정체영역이 생성됨을 알 수 있었다. One of the crucial problems which make the artificial heart operate improperly is the thrombus formation. Many experimental results show the thrombus formation is strongly retated with a high shear stress and the stagnation in the blood flow. Therefore study on the blood flow in artificial hearts is very important in a practical point of view. This thesis deals with the two- and three-dimensional unsteady blood flows in the Korean total artificial hearts(KTAH). It is numerically investigated by using the commercial finite element code ADINA. The flow in the sac of artificial heart results from the mutual interaction of the acuator, sac, and blood. Blood is assumed as an incompressible viscous Newtonian fluid, while the sac is considered to be elastic and isotropic solid material. The contact problem between the actuator and sac is included in the two-dimensional modelling. Because of the tremendously calculation time, the action of the actuator is replaced by the imposition of the time-varying pressure on the outer surface of the sac. Numerical results show a high shear stress distribution near the inlet and outlet corners of the sac. From two-dimensional calculation flow stagnation is seen to be found in the upper convex part of the sac. By comparing the numerical results with the experimental ones we can conclude the thrombus is generated in regions where blood flow stagnates or is very slow.

단기순환형 정동장애 3례

김은혜,최보문,유태열,백인호 大韓神經精神醫學會 1988 신경정신의학 Vol.27 No.4

Three cases of rapid cycling affective disorders were examined from a clinical perspective. We presented several different etiologies to the rapid cycling pattern in these patients. It was revealed that the rapid mood swings were due to natural expression of the affective disorder, tricyclic induced, lithium induced, and a combination of the aforementioned etiologies. Brief reviews on factors considered to induce rapid cycling, its etiopathogensis, clinical features and treatment strategies were also presented.

여의도 성모병원 신경정신과 입원환자에 대한 통계학적 고찰

김종은,최수호,최보문,김용찬,이규환 최신의학사 1984 最新醫學 Vol.27 No.1

대학생의 식행동과 식사의 질에 대한 연구

김은미,이보경,장유경 漢陽大學校 韓國生活科學硏究所 1999 韓國 生活 科學 硏究 Vol.- No.17

This study was performed to assess the diet-related behavior and food quality of 164 college students. Survey questionnaires including 24-hr dietary recall, diet-related behavior and anthropometric measurements were applied as the instruments. The results obtained were as follows. Body fat of female college students was higher than that of male college students and body fat of family history group was higher than that of non-family history group. By the value of BMI(body mass index), 62.5% of female college students were underweight and 52.6% of male college students were normal weight. WHR(Waist/ Hip ratio) of male and female college students was 0.79±0.01 and 0.71±0.01, respectively. Dietary behavior score was not significantly different between male and female college students, and between family history group and non-family history group. But family history group was concerned dietary behavior. The overall diet quality was assessed by RDA(Recommendation dietary allowance) for Korea, MAR(Mean adequacy ratio) and INQ(Index of nutritional quality). Intakes of P, vitamin B1, vitamin C, in students were more than RDA and intakes of energy, Ca, vitamin B2, niacin in students were below RDA. NAR was less than RDA and Ca was one of the seriously deficient nutrients in students. MRA was significantly different between male(0.80) and female college students(0.74), and the overall diet quality was low, especially among female college students. INQs of vitamin B2, niacin intake were low in male college students and INQs of Fe, vitamin A were low in female college students. There were positive correlation between the number of meals per day, nutrient intake and MAR. Therefore, nutrition education for college students is necessary, and new menus of campus cafeteria should be developed to meet the various needs of students.

주의력 결핍 과잉운동장애의 신경생물학적 측면

최보문,김종은 大韓神經精神醫學會 1990 신경정신의학 Vol.29 No.4

Since the reports on the effect of stimulants in controlling motor restlessness, inattention and distractibility, efforts have been made to elucidate the mechanism of action of the stimulants, and pathophysiology of the attention deficit hyperactivity disorder. This review has attempted to summarize biological findings on attention deficit hyperactivity disorder, from the fields of neuropharmacology and neuroanatomy. Most of the studies demonstrated that catecholamine function and its modulation are very probably involved at some level in the pathogenesis and treatment of this disorder. Reports on several neuroanatomical lesions also have implications for the catelcholamine hypothesis of the disorder. Further studies focusing on the response to stimulants and physiological studies using brain imaging technology will provide more comprehensive model of the pathophysiology of the attention deficit hyperactivity disorder.

고등학교 보건교육 교육과정 선정을 위한 조사 연구

이보은,김명,김애리 이화여자대학교 교과교육연구소 1998 교과교육학연구 Vol.2 No.1

The purpose of this study was to identify the health status, perception and experience for health education, needs for health education contents in high school students and to select areas and contents of health education curriculum. This study was surveyed 728 adolescents in high school from Sep. 11 1997 till Sep. 26 1997. The results were as follows. 1. For the perceived health status, 65.5% of the boys and 59.8% of the girls answered they were healthy. 18.8% of the boys and 59.8% of the girls experienced disease during the last year. 2. 67.3% of the boys and 71.6% of the girls acknowledge the necessity of health education. 3. For the experience of healty education, girls(82.7%) were reported high experience rates than the boys(51.3%). To the question of the instruction period, boys answered as middle school(84.0%) and girls as high school(77.2%). To the instruction teacher, many of respondents answered the school nurse(boys 80.0%, girls 73.3%). The satisfaction for contents they were taught were low(boys 21.4%, girls 31.7%). 4. The most desired areas of health education were Sex Education and Mental Health. The following were Health-Habit and Prevention of Disease in a sequent order. 5. The boys showed a high acknowledgement on Sex education, nutrition and Mental Health. 6. The girls showed a high acknowledgement on Sex education, nutrition and Mental Health. 7. The areas of health education curriculum were selected as follws: Nutrition, Growth and Development, Health-Habits, Prevention of Disease, Mental Health, Tabacco, Alcohol and other Drugs, Safety Education, Sex Education, Family Life and Health, Enviromental Health, Consumer Health.

황토와 생석회의 혼합비율에 따른 축산폐수 처리에 관한 연구

김보국,신은섭,원찬희 全北大學校 附設 都市및環境硏究所 1999 都市 및 環境硏究 Vol.14 No.1

This study was conducted in order to investigate removal efficiency of turbidity, organic matter, nitrogen and phosphorus to reduce environmental pollution of treatment livestock wastewater with mixed proportion of loess and lime. The result of study, the removal of turbidity, COD_Cr and T-P increased along the dosage, and was to be fixed above the appropriate dosage. In the removal turbidity, the appropriate mixed proportion of loess and lime was Loess:Lime = 3:7, the appropriate dosage was 30g. In the removal COD_Cr, T-P and TKN was Loess:Lime = 3:7, 30g, Loess:Lime = 5:5, 20g, Loess:Lime = 5:5, 40g, respectively.

초음속 과소팽창제트의 벽면 충돌에 관한 수치적 연구

심은보 國立金烏工科大學校附設生産技術硏究所 1996 産業技術開發硏究 Vol.12 No.-

In this study, a finite volume scheme has been developed to simulate the viscous supersonic underexpanded jet flows impinging into a wall. For the computation, the compressible axisymmetric Navier-Stokes equations are solved using a LU factored upwind method. Harten Yee's upwind TVD scheme is used for the inviscid explicit flux, whereas the implicit operator is reduced by Steger-Warming splitting and LU factorization. We have computed the underexpanded jet flow(Ma=2.2 and pressure ratio=1.2) for various nozzle-to-plate spacings and compared its results with the experiment to demonstrate the accuracy of the present algorithm. The numerical results show that a stagnation bubble exists near the stagnation point and its strength increases as nozzle-to-plate spacing decreases. Therefore, the viscous effects are very important in this region and thus viscous flow computations are inevitable for more accurate solutions.

骨盤炎患者 1例에 대한 症例報告

이보라,이정은,박경미,정진홍,유동열 대전대학교 한방병원 2001 惠和醫學 Vol.10 No.1

After treating a patient suffering from pelvic inflammatory disease, a significant result is gained as follows. This study was done from the patient who were at the oriental Medicine Hospital of Daejeon university during 15 days, from 12. 12 to 12. 26, 2001. A 27-year-old patient had complained an abdominal pain, chest discomfort, nausea, vomiting, urination difficulty and constipation. During the hospital periods, the kinds of therapy are acupuncture, moxibustion, herb-med and physical therapy. Given the treatment, she felt so satisfied about her symptom's improvement. But as a result of Ultrasonogram of pelvis, she had multiple follicles on the right ovary, so it had to be given a surgical operation. For the surgical operation, she was transferred to the Chungnam University Hospital

보행훈련방법이 편마비 환자의 보행요소와 족저압에 미치는 영향

김은정,황보각,권혁철 대구대학교 특수교육재활과학연구소 2009 再活科學硏究 Vol.27 No.2

이 연구는 뇌졸중으로 인한 편마비 환자에게 보행훈련방법을 달리하였을 때, 일반적인 지면과 트레드밀, 불안정면을 이용한 보행훈련이 보행요소와 족저압에 미치는 영향을 알아보기 위하여 편마비 환자 30명을 지면과 트레드밀, 불안정면 보행훈련군으로 무작위 배정하고 각 치료군들은 주 5회, 8주 간의 보행훈련을 실시하였다. 실험 전과 후, 보행요소를 알아보기 위하여 보행속도, 보장, 보각과 족저압을 측정하여 수집된 자료를 분석하여 다음과 같은 결과를 얻었다. 이 연구의 결과를 종합해 보면 보행훈련방법에 따라 지면 보행훈련은 보행속도와 족저압 전족부, 트레드밀 보행훈련군은 보행속도와 보각, 족저압 중족부, 불안정면 보행훈련군은 보행속도와 보장, 보각에서 유의한 증가를 보였다. 이러한 결과는 뇌졸중으로 인한 편마비 환자에게 보행훈련방법을 달리함에 따라 많은 영향을 끼치어, 환경의 변화와 다양한 과제에 대한 적절한 반응을 만들어 낼 수 있음을 의미하며, 기능 회복의 임상적 접근에서 치료 중재의 시점과 기간, 제공되는 환경, 과제의 선택에 대한 광범위한 연구가 필요할 것으로 생각되어진다. Purpose : This study was performed for effects of gait component and plantar foot pressure on gait training way needed in gait with hemiplegic patients caused by cerebrovascular accident. Methods : Three groups of adult hemiplegia(n=30) were allocated randomly in this study : group I(TGT : treadmill gait training), group II(USGT : unstable surface gait training) and group III(SGT : surface gait training). The gait training was provided to experimental groups for 8 weeks(5 times a week). Measurements of pre and post experiment were gait velocity, step length, toe out angle, foot plantar pressure which demonstrate temporal-spatial parameter of gait component. Results : The results of this study showed that in comparison of pre and post changes of gait training, SGT group has statistically significant differences in gait velocity, metatarsal area of foot plantar pressure, TGT group has statistically significant differences in gait velocity, toe out angle, midfoot of foot plantar pressure. USGT group has statistically significant differences in gait velocity, step length, toe out angle. Conclusion : These results mean gait training resulted by gait training way provides effective gait, with stroke, and therefore proper response about environmental changes and various tasks could be made.