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RISS 인기검색어
- 검색키워드
- 저자 : 李聖行 (검색결과 161 건)
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이성행,김하집,박영진,함형길,공보성,Lee, Seong-Haeng,Kim, Ha-Jip,Park, Young-Jin,Hahm, Hyung-Gil,Kong, Bo-Sung 한국농공학회 2011 한국농공학회논문집 Vol.53 No.3
A model test is carried out to investigate the vibration of truss type lift gate in the four major rivers project. The gate model scaled with the ratio of 1 : 25 is made of acryl panel dimensioned 1.6 m in width, 0.28 m in height in the concrete test flume. Firstly natural frequencies of the model gate are measured and the results are compared with the numerical results in order to verify the model. The amplitudes of the vibration are measured under the different gate opening and water level conditions. The results are analyzed to study the characteristics of the gate vibration according to the small gate opening, the large gate opening and the overflow conditions. These test results presents a basic data for the guide manuals of gate management and a design method to reduce the gate vibration of truss type lift gate. Finally, the vibration of truss type lift gate are assessed in comparison with those of formerly tainter gate.
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이성행,함형길,김경남,정경섭,Lee, Seong-Haeng,Hahm, Hyung-Gil,Kim, Kyoung-Nam,Jung, Kyoung-Sup 한국공간구조학회 2007 한국공간구조학회지 Vol.7 No.4
국내외적으로, 특히 중국에서 철강산업의 수요증대로 철판의 가격이 다른 재료에 비하여 급격하게 상승되고 있다. 열연 코일로부터 만들어지는 HR Plate는 후판에 비하여 가격이 저렴하다. 본 연구에서는 HR Plate의 재료특성을 검토하고, 강교에서 부부재와 주부재로서 HR Plate의 적용성을 연구하였다. 연구결과 일반 후판과 HR Plate는 두께 22mm까지 절단, 조립성, 용접 등의 특성에 있어서 차이가 없었다. 강박스교량의 부부재로서 사용율과 손실율은 각각 $10{\sim}15%,\;10{\sim}l5%$로 조사되었다. As business of steel consuming industries is freshly booming in domestic and foreign countries especially in China, the price of steel plates comes to very high compare with the other materials. The HR Plates made from hot rolled coils is lower steel plates in price. In this study, material characteristics of HR Plates is investigated and availabilities of HR Plates for steel bridges as sub member or a main member is discussed. No difference between steel plates and HR Plates with thickness up to 22mm is found in most characters such as cutting operation, fabrication and even welding. As sub member in steel box girders, the application ratio and the loss ratio of HR Plate is investigated as about $10{\sim}15%$, average $10{\sim}15%$ respectively.
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李聖行,楊九烈 慶北大學校 醫科大學 1959 慶北醫大誌 Vol.2 No.1
A 23 years old male patient of chronic constrictive pericarditis who was operated on successfully was presented. All of the cardiac chambers and great vessels were released from the constriction through bilateral anterior thoracotomy. One year follow-up result is excellent.
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이성행,김규태,한승세,이종태 慶北大學校 醫科大學 1981 慶北醫大誌 Vol.22 No.2
경북의대 흉부외과에서 개심술 후 부정맥 및 전도장애로 일시적인 pacing 의 도움을 받았던 8예를 임상적으로 분석하였다. pacing wire 는 우심실상에 두었고 Medtronic 社의 Temporary Demand Pacemaker 를 이용했다. 대상환자는 TOF 3예였고 승모판막 질환이 5예였으며 남녀는 각각 4예씩이었다. 완전방실블록이 술후에 출현한 2예에서는 pacing 후 1예는 블록이 교정되지는 않았으나 만족할 만한 심실맥박수를 유지할 수 있었고, 1예는 LCOS 로 사망했다. 동성서맥과 부정맥을 보였던 3예에서 2예는 술전상태인 심방세동과 정상범위로 각각 회복하였고 1예는 DIC 로 사망했다. 술후 잦은 PVC 가 출현했던 2예 중 1예는 LCOS 로 사망했다. 다양한 리듬장애를 일으켰던 1예는 fixed pacing을 했으나 LCOS 으로 사망했다. TOF 3예중 2예는 완전방실블록을 일으켰고 승모판막질환 5예는 대체로 동성서맥 및 부정맥과 잦은 PVC가 나타났다. 본 연구는 전예에서 ventricular pacing 을 했으나 향후 atrial pacing 을 임상에 병행이용하여 리듬의 보다 정확한 진단과 리듬장애에 대처해야 할것으로 생각된다. The incidence of heart block and arrhythmia following the repair of cardiac defects has been reduced to far less than that of early years of open heart surgery, but they, when developed, yet remain as serious and often lethal complications. The immediate management of these complications is often cardiac pacemaking through the myocardial electrodes. In majorities of the cases, a return of conduction and arrhythmia can be expected within several weeks, of pacing because the blocks and arrhythmias are caused by hemorrhage, edema, and ischemia of cardiac muscle and electrolyte imbalance and digitalis intoxication. Eight cases of heart blocks and arrhythmia were paced temporarily after open heart surgery. Ventricular pacings were carried out for all the cases with electrode to external wall of the right ventricle. Pace generator was Medtronics 5840 Demand External Pacemaker. Complete heart blocks developed in two cases after complete correction (patch repair of large VSDs) of Tetralogy of Fallot. One returned to regular sinus rhythm and the other failed to gain effective rhythm with temporary external pacings. Sinus bradyarrhythmias were appeared following the replacementof mitral valve in three cases. Two of them returned to their preoperative rhythms and one died with disseminated intravascular coagulation while the heart was being paced. Two cases of premature ventricular contraction and one case of multifocal rhythm were paced with one case of success.
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李聖行,辛道觀,姜振聖,朴鍾吉 慶北大學校 醫科大學 1966 慶北醫大誌 Vol.7 No.2
Eight cases of the patent ductus arteriosus were observed recently. Exertional dyspnea and palpitation were chief complaints. Peculiar physical findings were continuous machinary murmur with thrill and low diastolic blood pressure. Right heart catheterization showed the pulmonary hypertention and slightly increased O₂content of pulmonary artery blood in all cases. The operative closure of the ducts was attended by a mortality rate of 25 percent,; one was resulted from bleeding and another from cardiac arrest during the operation.
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이성행 대한흉부심장혈관외과학회 1977 Journal of Chest Surgery (J Chest Surg) Vol.10 No.2
Open heart surgery has been performed on 20 patients, using hemodilution principle under the moderate hypothermia from Dec. 1975 through Aug. 1977 at the Department of Thoracic and Cardiovascular Surgery, Kyungpook National University School of Medicine. All these patients, body surface area ranged from 0.53 to 1.67$M^2$, were divided into two groups as a child group [below 15 yrs] and a adult group[above 15 yrs]. The oxygenator were primed with fresh ACD blood, 5 per cent dextrose, Hartmann`s solution, 15 per cent mannitol, sodium bicarbonate, dexamethasone and antibiotics. The average flow rate was 2.0 L/$M^2$/min. in child group and 2.3L/$M^2$/min. in adult group. The degree of hemodilution in child and adult group was 30.7% and 29.3% respectively. The minimal value of rectal temperature was $30.84{\pm}0.7^{\circ}C.$, in child group and $30.0{\pm}1.5^{\circ}C.$, in adult group. We studied the changes of hemodynamic status, blood components, electrolyte, acid-base status. blood lactic acid and urine output during and after cardiopulmonary bypass.
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