해운대 해수욕장의 이안류 발생기구 및 수치모의

김인철(Kim, In-Chul),이주용(Lee, Joo-Yong),이정렬(Lee, Jung-Lyul) 한국해안해양공학회 2011 한국해안해양공학회 논문집 Vol.23 No.1

2009년 8월 13일과 15일, 부산 해운대 해수욕장 앞 해상에서 이안류가 발생하였다. 또한, 올 여름인 2010년 7월 29일과 30일에도 이안류가 발생하여 피서객 들이 조난된 사고가 발생하였다. 해수욕객들은 전원 구조되어 인명 피해는 발생하지 않았지만 최근 이안류 발생이 너무 잦아져 이에 대한 원인파악과 대책마련이 시급한 실정이다. 본 논문에서는 파랑모형과 조류가 결합된 해빈류 모형을 기본으로 튜브거동까지 재현되는 사용자 편의를 위하여 GUI로 개발된 HAECUM 모형(HAEundae CUrrent Model)을 이용, 해운대 해수욕장의 이안류 발생 수치모의를 실시하였다. At Haeundae Beach in Busan, people were swept away by the fast-moving rip current and rescued, on August 13th and 15th, 2009 & July 29th and 30th, 2010. In predicting the wave-induced current and consequent tube movement for public safety, the coastal flows and waves are calculated at each time step and grid point by means of systematic interfacing of hydrodynamic and wave models (Lee, 2001). To provide a user-friendly simulation tool for end-users, the forecasting system has been built in a software package called HAECUM. Outputs from the system are viewed as graphs of tube positions with combined current vectors for easy decision of emergency management officials. The tube-wave interaction is taken into account and the traces of swim tube are simulated by using a Lagrangian random walk (Chorin, 1978; Lee, 1994). In this study, we use the Lee's approach (Lee, 1993) in estimating the surface onshore currents due to wave breaking.

성인에서 선천성 심장기형의 수술성적 -725 치험례 보고-

이정렬,서경필,Lee, Jeong-Ryeol,Seo, Gyeong-Pil 대한흉부심장혈관외과학회 1986 Journal of Chest Surgery (J Chest Surg) Vol.19 No.1

Patients over 15 years of age who have undergone a surgical correction of a congenital cardiac malformation during period of January 1958 through January 1986 have been reviewed. During this period there were 3957 congenital cardiac lesions consisting of 2712 acyanotic and 1245 cyanotic cases. Among them, a total of 725 adults [18.3%] with a variety of congenital heart lesions, 548 acyanotic group and 177 cyanotic group were operated on. 372 patients were male and 252 patients were female. There were 280 patients under 20 years of age, 206 between 20-24 years, 102 between 25-29 years, 48 between 30-34 and 89 over 35 years. The most common defects were atrial septal defect which accounted for 207 cases [28.6%] and other common anomalies were VSD [140 cases, 19.3%], TOF [136 cases, 18.6%], PDA [120 cases, 16.6%] and PS [33 cases, 4.6%] in order of incidence. Overall operative mortality for this series was 3.6% [1.8% of a cyanotic group and 9.0% of cyanotic group] compared with 2.8% of total cases of congenital heart disease [acyanotic group 1.1% and cyanotic group 6.5%]. This reviewed series reveals the incidence of operable congenital heart defects appearing in any adult life and demonstrates that surgical repair can be accomplished with a satisfactory low mortality rate.

선박전용 구조해석 시스템(SeaTrust-Holdan) 개발 현황 및 향후 방안

이정렬,박호균,도형민,Lee, Jeong-Ryeol,Park, Ho-Gyun,Do, Hyeong-Min 대한조선학회 2008 大韓造船學會誌 Vol.45 No.4

토끼 동방결절 활동전압에 대한 Na, K, Ca 및 Mg 이온의 영향

이정렬,엄융의,Lee, Jeong-Ryeol,Eom, Yung-Ui 대한흉부심장혈관외과학회 1985 Journal of Chest Surgery (J Chest Surg) Vol.18 No.1

Isolated sinus node cells of the rabbit were used to assess the effects of extracellular Na, K, Ca and Mg concentrations on cardiac pacemaker activity. With intracellular glass micro-electrodes spontaneous action potentials of SA node were recorded and the effects of various ions and their blockers were analyzed in terms of the cycle length, the amplitude and the duration of action potentials, the results obtained were as follows. 1. Sodium reduction [up to 30%] decreased the amplitude of action potential and lengthened the cycle length. TTX, specific blocker of Na channel slightly lengthened the cycle length. 2. Increasing potassium ion concentration, the duration of action potential decreased and the frequency increased in 6mM, however, spontaneous action potential was stopped in 24 mM. Barium ion known to be decreasing K conductance increased the duration of action potential but no significant change in the cycle length was noticed. 3. Calcium ion has shortening effect on the duration and the cycle length of action potential but not with dose-dependent manner. Cadmium ion .[0.02mM] lengthened cycle length and the duration of action potential. 4. Increasing the concentration of magnesium ion the cycle length was lengthened, significantly.

심근세포내 칼슘 이온 활용도에 미치는 Vanadate 의 효과

이정렬,김우겸,Lee, Jeong-Ryeol,Kim, U-Gyeom 대한흉부심장혈관외과학회 1988 Journal of Chest Surgery (J Chest Surg) Vol.21 No.2

The effect of Vanadate on the isometric contraction, membrane potential and intracellular calcium ion activities of rabbit myocardial cells were investigated, using calcium selective microelectrode, filled with neutral calcium ion carrier, ETH-1001. The resting tension, the membrane potential and the intracellular calcium ion activities were recorded in normal Tyrode solution and compared with those in the contracture induced by 10 mM Vanadate. The following results were obtained: 1. The dose-response relationship between the contraction of Vanadate and twitch tension showed near-maximum response in 5mM with no corresponding changes in action potential. 2. The resting tension increased up to the amplitude of a control twitch in 10mM Vanadate with resting membrane potential, hyperpolarized. 3. Increase in intracellular calcium ion activities proceeded the contracture by 10mM Vanadate which were restored to the control level in accordance with a decrease of intracellular calcium ion activities. 4. The amplitude of contractures by 10mM Vanadate were 90-120% of the control twitch tension in which the intracellular calcium ion activities were increased about 70 times from p Ca, 7.1 in the control to p Ca, 5.8 in contractures.

대동맥폐동맥 중격결손증, 개방성 대동맥관 및 우측 쇄골하동맥 이상기시를 동반한 대동맥궁 결손증

이정렬,노준량,Lee, Jeong-Ryeol,No, Jun-Ryang 대한흉부심장혈관외과학회 1985 Journal of Chest Surgery (J Chest Surg) Vol.18 No.2

A case of complete interruption of aortic arch with aortopulmonary window, patent ductus arteriosus, and aberrantly originated right subclavian artery from proximal descending aorta, in a four year old boy is reported in detail. This is the only reported case in Korea, who has had a successful one-stage total anatomical correction of this combination of defects. Under deep hypothermia and total circulatory arrest, aortic continuity was established using patent ductus arteriosus and anterior wall of pulmonary artery, which was anastomosed obliquely to anteromedial side of ascending aorta. Aortopulmonary window was closed using Impra patch via pulmonary arteriotomy. Then pulmonary arteriotomy was reconstructed primarily except at the junction of right pulmonary artery and main pulmonary artery, where a small piece of pericardium was used to close the defect to prevent kinking and narrowing of right pulmonary artery. Postoperative cardiac catheterization demonstrated a good reconstruction.

분리된 간정맥 및 하대정맥 환류를 동반한 단심실 환자에서의 변형 심장외 도관 폰탄술식 - 1례 보고 -

이정렬,이철,장지민,Lee, Jeong-Ryeol,Lee, Cheul,Chang, Ji-Min 대한흉부심장혈관외과학회 2001 Journal of Chest Surgery (J Chest Surg) Vol.34 No.10

복잡한 체정맥 그리고/혹은 폐정맥 환류를 동반한 단심실 환자에서, 심방내 폰탄술식은 체정맥 및 폐정맥 입구들간의 복잡한 위치관계로 인하여 기술적으로 어려울 수 있다. 저자등은 간정맥과 하대정맥이 멀리 떨어져서 공통 심방으로 환류되며, 간정맥의 심방내 입구가 좌하폐정맥과 근접하였던 단심실 환자에 대해 변형 심장외 폰탄술식을 성공적으로 시행하여 이를 보고하는 바이다. In a patient with single ventricle associated with complex systemic and/or pulmonary venous drainage, intraatrial Fontan procedure is sometimes technically difficult due to the complex spatial relationship between their orifices in the atrium. We report a case of the modified extracardiac conduit Fontan procedure in a patient with a single ventricle in which the inferior vena cava and the hepatic vein drained separately into the atrium and the intraatrial orifice of the hepatic vein was abut to the orifice of the left lower pulmonary vein.

우리나라 산업간호사의 보건관리자로써의 역할 조명

이정렬,Lee, Jeong-Ryeol 대한산업보건협회 1993 산업보건 Vol.63 No.-

동해 풍파 발생 및 너울성 파랑의 동해안 내습 예측시스템

이정렬,Lee, Jeong-Ryeol 한국수자원학회 2012 물과 미래(한국수자원학회지) Vol.45 No.12

소아 연령군에서의 냉각-산소화-희석-혈심정지액을 이용한 심근 보호에 대한 임상적 고찰

이정렬,김용진,Lee, Jeong-Ryeol,Kim, Yong-Jin 대한흉부심장혈관외과학회 1992 Journal of Chest Surgery (J Chest Surg) Vol.25 No.3

Hypothermic cardioplegia is a well established method to optimize myocardial preservation during ischemic arrest, and it has been demonstrated that oxygenation of crystalloid cardioplegic solutions markedly enhances myocardial protection, The addition of a small amount of red blood cells to a crystalloid cardioplegic solutions improves capillary perfusion. Considering these results, we changed our cardioplegic solution from cold oxygenated crystalloid[Group 2] to cold oxygenated diluted blood[Group 1]. In this investigation, we examined the effects of two hypothermic potassium cardioplegic solutions on myocardial preservation in 50 patients[30 of Group 1 and 20 of Group 2] of child age group. Factors considered preoperatively included age, sex, body weight, preoperative diagnosis, and they showed no statistical differences, Intraoperative factors considered included duration of cardiopulmonary bypass, duration of aortic occlusion, operative mortality, which also revealed no statistically significant differences, We measured the serum levels of GOT[glutamate oxaloacetate transaminase] and CPK [creatine phosphokinase] during the first two days postoperatively, which, in both groups, showed significantly higher values until postoperative 1 day, and decreasing tendancy thereafter, however we failed to find any significant difference between two groups regarding the serum levels of those enzymes each day. Time for extubation and use of inotropics also revealed no significant differences. Defibrillation was needed less in Group 1 than in Group 2[p<0.05], and one case of supraventricular tachyarrhythmia occured in Group l. We conclude that cold oxygenated diluted blood cardioplegia provides no less preservation than does an oxygenated crystalloid cardioplegic solution in child age group.