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이호성,Lee, Ho-Seong 한국재료학회 1995 한국재료학회지 Vol.5 No.1
현재 계획중인 항공우주상업과 관련된 부품을 제조하여 생산하기 위해서는 사용된 재료가 설계요구조건에 적합한지가 평가되어야 한지만 국내에서는 항공기나 우주비행체를 개발한 경험이 없으므로 평가체제가 확립되어 있지 않다. 따라서 항공기 및 우주비행체의 내구성과 안전성확보에 필요한 재료의 인정방법을 정의할 필요가 있다. 본 기고에서는 항공우주 선진국에서 수행하고 있는 재료 및 가공공정의 합치성 결정에 필요한 특성시험을 고찰하고, 우주환경에 의한 재료특성 변화와 항고기용 복합재료 평가의 예를 제시하여, 국내의 항공우주용 재료 평가체제 확립의 기초가 되도록 하였다. In order to manufacture and produce the components to be used for developing aerospace products, it is essential to determine the conformity of material characteristics to the design requirements. However, since the Korean industry has no experience to develop aircraft and spacecraft, the national certification system has not been established. Hence, it is necessary to define the qualification methodology of material to establish the durability and the safety of aircraft and spacecraft. In this paper the characterization methodology which has been performed in aeronautically advanced countries for determination of conformity in materials and production process is reviewed. The change of material properties due to the space environment and the example of evaluation program of composites for the application of aircraft are presented. so that the foundation of evaluation system for aerospace materials can be initiated.
이호성,송양섭,이동두,Lee, Ho-Seong,Song, Yang-Sup,Lee, Dong-Doo Korean Chemical Society 1987 Bulletin of the Korean Chemical Society Vol.8 No.5
Alkylation and allylation of arylborates give mono(ipso) and/or di(ortho and ipso) substitution products. Those factors which promote polarization or ionization of alkylating agents favor di substitution. The ${\sigma}$-type(ipso) substitution reaction of arylborates involves direct interaction of the carbon-boron bonds rather than predissociation of arylborates into aryllithiums and boranes.
이호성,문현구,Lee, Ho-Seong,Moon, Hyun-Koo 한국터널지하공간학회 2016 한국터널지하공간학회논문집 Vol.18 No.5
본 연구에서는 쉴드 TBM에 의한 대심도 복층터널의 계획 시 세그먼트 라이닝의 거동을 주요 구조물인 내부 슬래브의 연결구조 형식에 따라 검토하였다. 복층터널의 내부슬래브와 세그먼트 라이닝 설계 요구조건을 정립하기 위하여 용도에 따라 내부 구조물의 형식을 정의하고, 터널 라이닝과 내부 슬래브의 연결구조를 비교하였다. 그리고 MIDAS Civil 2012 프로그램으로 빔-스프링 모델을 이용하여 수치해석을 수행하였다. 본 연구결과 중간슬래브 및 하부슬래브, 내부슬래브와 세그먼트 라이닝의 연결 형식 그리고 측압계수들은 복층터널 계획시 주요 설계사항임을 확인하였다. This study analyzed behavior of the segment lining considering connection type between inner-slab and segment lining for a double deck tunnel by Shield TBM. In order to establish the design requirements of inner-slab and segment lining in double deck tunnel, inner structure of double deck tunnel at each purpose was analyzed and compared connection type between inner-slab and segment lining. And analyses have been carried out through the beam-spring model by MIDAS Civil 2012. As a result of this study, inner-slab, connection type of between inner-slab and segment lining and Lateral earth pressure coefficients were analyzed to verify the significant design factors.
이호성(Ho Seong Lee),조윤향(Yoon Hyang Cho),오지원(Ji Won Oh),박기범(Ki Beom Park) 대한피부과학회 1992 대한피부과학회지 Vol.30 No.5
Idiopathic thrombocytupenic purpura is known as an autommune t,hrombocytopenic purpura. It is characterized by either an acute or gradual onset of petechiae or ecchymoses in the skin and mucous membranes, especially in the mouth. Epistaxis, conjunct.ival hemorrhage, hemorrhagic bullae in the mouth, gingival bleeding, melena, and hematemesis may occur. We report a case of idiopathic thrombocytopenic purpura in a 10-year-old male, who showed multiple petechiie and ecchymoses on both lower extremities, and hemorchagic bullae in the mouth. Periheral blood smear showed decreased platlet count, and in the bone marrow megakeyocytes were incraesed. Bleeding time was increased, but coagulation time was normal. (Kor J Dermatol 1992;30(5):684-688)
이호성(Ho Seong Lee),김태흥(Tae Heung Kim),박기범(Ki Beom Park) 대한피부과학회 1992 대한피부과학회지 Vol.30 No.5
A 50-year-old female, who had been suffered from diabetes rielitus, showed typical cutaneous findinhs of dermatomyositis with only transient and mild proximal muscle weakness at sometime during the course of disease. She had Gottrons papules, Gottrons sign, heliotrope rash, macular violsceous erythema involving neck, anterior chest, back, extensor site of forearms and arms and dorsa of hands. However, he serum CPK, LDH and sGOP levels were within normal limits. Her fasting and 2 hours potprandial blood glucose levels were elevated. There were no histological abnormality in muscle biopsy. Histopathologic findigs of the skin lesion on her back were that of poikiloderma atrophicans vasculare. We diagnosed our patient as Rebeccas type 2 amyopathic dematomyositis which is chracterized by skin disease with subjective myalgias and musle weakness, but without laboratory evidence of muscle disease. (Kor J Dermatol 1992;30(5):679-683)