접합부와 보의 상대강성을 고려한 중층 철골 모멘트 골조의 내진해석

하성환,강철규,한홍수,한권규,최병정,Ha, Sung-Hwan,Kang, Cheol-Kyu,Han, Hong-Soo,Han, Kweon-Gyu,Choi, Byong-Jeong 한국강구조학회 2011 한국강구조학회 논문집 Vol.23 No.5

본 연구는 기둥-보 접합부의 강성에 따른 철골 모멘트 골조의 동적특성의 차이를 파악하는데 목적이 있다. 6층의 철골 모멘트 골조를 설계하였으며, 접합부는 DWA (Double Web-Angle Connection), TSW (Top-and Seat-Angle Connection with Double Web-Angle), FEMA(SAC-Test Summary No.28, Specimen ID : UCSD-6) 접합부를 사용하였고, 완전강접합부의 동적거동특성과 상호 비교 검토하였다. 반강접 접합부의 회전강성은 Chen 과 Kishi 에 의해 제안된 3매개변수파워모델을 사용하여 구하였다. 접합부의 회전 강성을 보의 강성으로 나누어 상대강성으로 정의하여 사용하였다. 모든 골조에 대하여 비선형 정적해석(push over analysis), 반복하중 해석 및 시간이력해석을 수행하였다. 각 접합부의 강성에 따른 내진거동은 층간변위, 소성힌지 및 이력 에너지 분배의 항목별로 비교 분석하였다. This study was conducted to investigate the seismic behavior of steel member resisting frames considering the relative stiffness of the connection and beams. Six-story steel moment frames were designed to study the seismic behavior. The connections were classified into Double Web-Angle connections (DWAs), Top- and Seat-angles with double Web-angles (TWSs), FEMA-Test Summary No. 28, Specimen ID: UCSD-6 (SAC), and Fully Restrained (FR). The rotational stiffness of the semi-rigid connections was estimated using the Three-Parameter Power Model adopted by Chen and Kishi. The relative stiffness, which is the ratio of the rotational stiffness of the connections to the stiffness of the beams, was used. Push-over, repeated loading, and time history analysis were performed for all the frames. The seismic behavior of each frame was analyzed with the story drift, plastic hinge rotation, and hysteretic energy distribution.

Liposome을 이용한 Tc - 99m의 표지와 백서에서 조직분포에 대한 연구

하성환,이영기,정은주,고창순,이명철,정준기,정재민,김덕윤,홍미경,김상은,이범우,김문혜 대한핵의학회 1990 핵의학 분자영상 Vol.24 No.1

진보적 교육자 이만규

하성환 뉴 래디컬 리뷰 2015 뉴 래디컬 리뷰 Vol.- No.65

방사선은 해로운가?

河星煥 대한의학협회 1995 대한의학협회지 Vol.38 No.11

Bowel Complication after Radiotherpy of Uterine Cervix Carcinoma

하성환,정웅기,김종훈,Ha, Sung-Whan,Chung, Woong-Ki,Kim, Jong-Hoon The Korean Society for Radiation Oncology 1992 대한방사선종양학회지 Vol.10 No.2

Five hundred and fifty patients treated for carcinoma of the uterine cervix at the Department of Therapeutic Radiology, Seoul National University Hospital from 1979 to 1986, were analyzed retrospectively for late rectal complications. Of them, 468 patients received primary radiotherapy for the cervix cancer in intact uterus, and the other eighty two patients were treated postoperatively. The cumulative incidence of radiation induced rectal complication of grade 2 or 3 was 6.7% at five years. The mean rectal dose for the group of patients with complication was higher than the group without complication, and the difference was statistically significant (p<0.01). But relationship between mean rectal dose and severity of complication was not found. The frequency of complication (grade 1, 2, 3) increased as a function of radiation dose to rectum; from 16.1% for patients with rectal dose less than 6,000 cGy to 71.2% for patients with rectal dose higher than 8,000 cGy. Among various factors analyzed, history of diabetes mellitus, number of intracavitary irradiation, size of ovoid, retroflexion of uterus and the total dose delivered to rectum turned out to have significant effect on the complication.

투시를 이용한 기관삽관의 새로운 방법

하성환 대한영상의학회 1976 대한영상의학회지 Vol.12 No.2

We introduce a simple new technique of peroral transglottic intubation of bronchographic catheter with fluoroscopy. The majority of disadvantages of the transglottic method can be overcome with this technique and, of course, the advantages of transglottic procedure are exaggerated. And one of the most important development is that the neck might not be fully extended as has been mandatory in previous procedures, transglottic or percutaneous. This fact is important because many patients, especially old aged, have pathology of the cervical spine and full extension of neck is impossisible or greatly discomfortable. And stout, short necked patients have given difficulty for the radiologists. These problems can be easily solved with this technique. This technique can be summarized as follw. 1. The oral cavity, pharynx and larynx are anesthetized with spray of 2% lido caine. 2. Then 1 to 2% lidocaine is dripped over the larynx through a curved cannula, with or without fluoroscopy. 3 Under fluoroscopic control, M tras' catheter is introduced over a wire mandarin to the upper larynx and, during inspiration, the catheter is advanced into the trachea through the glottis. This technique is a modification of M tras' methed. With fluoroscopy, the bronchographic catheter can be intubated into the trachea more easily and with less discomfort to the patients. A total of 90 bronchographies were carried out using this technique and average time consumption was 10 minutes. We conclude that, with this new technique brobchography can be performed more conveniently not only to the patients but also to the radiologists.

코뮤니스트 항일여전사 이화림

하성환 뉴 래디컬 리뷰 2019 뉴 래디컬 리뷰 Vol.- No.80

자궁경부암의 방사선 치료

하성환,우홍균 주식회사 녹십자 1999 녹십자의보 Vol.27 No.5

종격동 종양의 방사선학적 고찰

하성환 대한영상의학회 1975 대한영상의학회지 Vol.11 No.3

Radiologic study is the most important and valuable mode for detection and diagnosis of mediastinal tumors since a large part of patients are asymptomatic when detected and other studies are of little assistance in detection and diagnosis. It is difficult and often impossible to differentiate these tumors radiologically without histologic findings. for this reason and recent advances in anesthesia and thoracic surgery, aggressiveness for surgical trial for diagnosis and treatment has increased. However, it is sometimes impossible to remove tumors completely or even thoracotomy may be needless. so every diagnositc study including roentgenologic study and biopsy should be tried before thoracotomy. 85 cases of mediastinal tumors diagnosed and treated at Seoul National University Hospital during past 8 years were reviewed in respect to the types of tumors, location age incidence as well as radiographic findings. The Results are 1. The commonest tumor was lymphoma being 24 cases(28 2%). Tuberculous lymphadenitis(12 cases 141.%), teratodermoids(11 cases, 12.9%), neurogenic tumors(10 cases, 11.8%) and thymoma(8 cases) rank next in order of frequent. 2. Tumors of middle compartment were 37 cases(43.5%), anterior, 27 cases(31.8%) and posterior, 21 cases(24.7%). 3. Most common tumors of each compartment were teratodermoid in anterior, lymphoma in middle and neurogenic tumor in posterior. 4. 29 cases of the series were proved as malignant, being 34.1%, of which lymphoma was the commonest.

백서 유방암의 단일 및 분할 조사시 방사선치료 효과

하성환,허승재,박찬일,Ha, Sung-Whan,Huh, Seung-Jae,Park, Charn-Il 대한방사선종양학회 1984 Radiation Oncology Journal Vol.2 No.2

The therapeutic effect of mammary breast cancer of rat (Sprague Dawley) was estimated by single and 5 fractionated irradiation of $Co^{60}-\gamma-ray$. Response rates over 50a were 20, 43, 67, $80\%$ respectively by single dose irradiation of 800, 1,200, 1,600, 2,000 rad, and 20,38, 57, $88\%$ by 5 fractionated irradiation of 1,400, 2,100, 2,800, 3,500 rad. $50\%$ tumor control dose$(TCD_{50})$ were 1,282rad, 2,312rad respectively with single and fractionated irradiation.