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포스트텐션공법을 적용한 고강도 콘크리트 아웃리거 부재의 구조성능에 관한 실험적 연구
정경수(Chung Kyung-Soo),최종문(Choi Jong-Moon),김대근(Kim Dae-Keun),문정호(Moon Jeong-Ho) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.12
Large outrigger elements tie the concrete core to perimeter columns, significantly increasing the building's lateral stiffness as well as its resistance to overturning due to wind. The outriggers role to deep beam elements in a building, and large tie forces are resisted by heavy longitudinal reinforcing and vertical ties in top and bottom of those. High-strength concretes have been specified for outrigger elements. However, the reductions in the amount of concrete and reinforcement steel are the most important issue in tall building. Under these backgrounds, this study is conducted to develop outrigger members composed to prestressed high-strength concrete. Four 1/4-scale test specimens are selected from the same prototype structure. The size of the test specimens are length 5.6m and depth 1.2m. The structural performance are evaluated under cyclic loading. The results from the tests are confirmed that the developed outrigger members have better structural performances with regard to initial stiffness, small residual plastic deformation and energy absorption. The results of the numerical analysis using fiber cross sections show a similar trend to the experimental results.
이찬주 ( Chan Joo Lee ),최준정 ( Jun Jeong Choi ),전한호 ( Han Ho Jeon ),정경수 ( Kyung Soo Jung ),박병훈 ( Byung Hoon Park ),박선철 ( Seon Cheol Park ),신상윤 ( Sang Yun Shin ),정우영 ( Wou Young Chung ),변민광 ( Min Kwang Byu 대한결핵 및 호흡기학회 2008 Tuberculosis and Respiratory Diseases Vol.64 No.5
Angiosarcoma is a rare but highly malignant tumorthat usually arises in the scalp or face of elderly males. Distant metastases favor the lung, liver, lymph nodes and skin. Metastatic pulmonary angiosarcoma commonly takes the form of a nodule but can sometimes appear as a thin-walled cyst. We report a case of 65 years-old male with a spontaneous pneumothorax, who underwent excision and radiotherapy for an angiosarcoma of the scalp 2 years ago. A chest CT scan revealed multiple cysts in the lung. The video-assisted thoracoscopic lung biopsy demonstrated subpleural cysts without tumor cells. A skin biopsy of the scalp showed an angiosarcoma. This case was diagnosed as a recurrence of an angiosarcoma with a supposed lung metastasis. This case suggests that a spontaneous pneumothorax in elderly people may be secondary to a pulmonary metastasis from an angiosarcoma of the scalp. (Tuberc Respir Dis 2008;64:374-378)
국부통계조사 간접방법에 대한 대안 제시 - 영구재고법을 중심으로
조진형(Jin-Hyung Cho),박상훈(Sang-Hoon Park),김명수(Myung-Soo Kim),오현승(Hyun-Seung Oh),정경수(Kyung-Soo Jeong),서보철(Bo-Cheol Seo) 한국산업경영시스템학회 2006 한국산업경영시스템학회지 Vol.29 No.3
The National Wealth Survey Method has been used to estimate capital stocks in Korea by the Korea National Statistical Office in every 10 years. However, this method requires huge amount of time and money. Since the Benchmark Year Method also has similar problems of difficulties to estimate the annual retirement rate and depreciation, the Korea National Statistical Office is now considered to adapt the Perpetual Inventory Method being used by the most OECD countries as an alternative. Hence, in this paper, the concepts of the Perpetual Inventory Method are introduced and its formation plans for the National Wealth Survey are suggested.
박선철 ( Seon Cheol Park ),박병훈 ( Byung Hoon Park ),신상윤 ( Sang Yun Shin ),전한호 ( Han Ho Jeon ),정경수 ( Kyung Soo Chung ),박준철 ( Jun Chul Park ),정재헌 ( Jae Heon Jeong ),권지은 ( Ji Eun Kwon ),박무석 ( Moo Suk Park ) 대한결핵 및 호흡기학회 2007 Tuberculosis and Respiratory Diseases Vol.63 No.3
Lymphangioleiomyomatosis (LAM) is a rare disease that affects females of reproductive age. It is characterized by the abnormal proliferation of smooth muscle cells in the lung and along the axial lymphatics. We report a case of lymphangioleiomyomatosis presenting as a lung mass. The patient visited the emergency room because of dyspnea upon exertion. The chest X-ray showed a lung mass in the right lower lung field and a pneumothorax in the left lung. Chest computed tomography revealed a 5 x 3 cm sized mass in the right lower lobe and multiple thin-walled small cysts scattered in both lungs. Transbronchial biopsy of the lung mass was performed. The biopsy specimen showed atypical smooth muscle cell proliferation and cystic dilatation of the terminal bronchioles, which confirmed the diagnosis of lymphangioleiomyomatosis. To the best of our knowledge, this is the first case of lymphangioleiomyomatosis presenting as a lung mass. (Tuberc Respir Dis 2007; 63: 289-293)