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頭蓋骨 癒合症의 治驗 3例 : 3CASES EXPERIENCE
曺秉七,金昌鉉,李泰權 大韓成形外科學會 1984 Archives of Plastic Surgery Vol.11 No.1
From 1980 to 1983, 3 patients with craniosynostosis were treated surgically. One of the three patients had coronal, lambdiod and metopic craniosynosis, and the others showed coronal craniosynostosis bilaterally. They had undergone linear craniectomy along the fused sutures and supraorbital craniectomy for the former, at two to six month after birth. Postoperative courses were good and unevenful. Follow-up has continued, ranging from 3 month to 15 month. Clinical results are satisfactory. We reviewed the literatures discussed these cases.
曹秉七,河芝耘,李泰權 大韓成形外科學會 1984 Archives of Plastic Surgery Vol.11 No.4
Enlarging congenital arteriovenous malformation poses an unsolved surgical challenge. The etiology and pathogenesis are obscure. Grotesque facial disfigurement provokes reactions of revulsion, which may lead to complete with-drawal of the patient from society. These people are desperate for any improvement in their appearance. At present, there are no definitive therapeutic methods for these lesions. Among the therapeutic methods, the surgical excision has been the most commonly used method of treatment. But surgical complete extripation was not possible because of extensive intraoperative bleeding. Recently, to reduce intraoperative bleeding, methods such as "arterial embolization or electrothrombosis with superse lective angiography" were introduced and widened the scope of possible treatment. But these methods may evoke such serious complications as extensive tissue necrosis or distant intracranial embolization. Other disadvantages to the methods are the neccessity of special equipment and well trained specialists. We used electrocoagulation for treatment of hemangioma as a therapeutic method or as a preliminary procedure for later surgical extirpation. Based on our 3 year's experience, electrocoagulation proved to be usefull. We report our observations.
랭거아치교의 라이즈-경간-형고의 최적관계를 위한 정적 및 동적해석
허은미,최지훈,조병칠,이용재,Hur, Eun Mi,Choi, Jee Hoon,Cho, Byoung Chil,Lee, Young Jae 한국강구조학회 2002 韓國鋼構造學會 論文集 Vol.14 No.2
강재의 고강도화 및 경량화가 실현되고, 해석기법이 발달함에 따라 장경간을 갖는 강아치교의 건설이 가능하게 되었다. 장경간 아치교를 설계하기 위해서 경제적으로는 재료를 최소화시키며 구조적으로는 안전해야 한다. 이에 본 연구의 목적은 최적설계를 위한 형고의 높이를 제시하고 강재량에 영향을 주는 라이즈-경간비에 대해서 우리나라 활하중을 재하하여 검토하였다. 또한 구조적 안전성을 검토하기 위해 지진에 대한 동적거동을 비교 연구하였다. 라이즈-ㄱ경간-형고에 대한 관계식은 60, 70, 80, 90, 100m의 5개 기본경간을 SAP2000 프로그램을 이용하여 값을 산출하고 회귀분석을 통하여 관계식을 얻었다. 그리고 지진에 대한 동적 거동을 파악하기 위해 포트받침과 탄성받침을 사용했을때 교각형태, 교각높이 및 라이즈-경간비등을 변화시켜 교축방향과 교축직각방향에 대한 단면력을 확인하였다. Development of high-strength and light-weight structural steel as well as advancement in steel structure analysis enable construction of long span steel arch bridge. In an economic viewpoint, however, the design values of long span steel arch bridge needs to be optimized to reduce construction cost and achieve proper levels of structural safety. This study investigated the girder depth and the rise-span ratio for optimum design values, as well as the spectral analysis for protection against earthquake. The relationship between rise-span ratio and girder depth was derived based on the parametric studies of the basic span lengths of 60, 70, 80, 90, and 100m using a commercial Cis SAP2000. The equation relating the two variables was derived using linear regression.