전기기계기구 제조업의 안전관리 개선 사례

이호성,Lee, Ho-Seong 대한산업안전협회 2004 안전기술 Vol.84 No.-

기술기사 1 - 컴퓨터 기반 그라우팅 자동관리에 의한 가압식소일네일링 현장 적용 사례(ASN공법 적용 사례)

이호성,현정용,강희진,최기성,Lee, Ho-Seong,Hyeon, Jeong-Yong,Gang, Hui-Jin,Choe, Gi-Seong (사)한국토질및기초기술사회 2012 지반과 기술 Vol.9 No.2

Alkylation and Allylation of Lithium Arylborates Factors Affecting the Di/Mono Substitution Ratio$^\dag$

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.

근접병설터널의 보강 및 안정성 평가

이호성,구본수,김정호,Lee, Ho-Seong,Gu, Bon-Su,Kim, Jeong-Ho 한국터널지하공간학회 2006 터널기술 Vol.8 No.3

산업예방제도, 이젠 변화되어야 한다

이호성,Lee, Ho-Seong 대한산업보건협회 2007 산업보건 Vol.235 No.-

항공우주용 재료의 품질평가

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.

복층터널 내부슬래브의 연결형식에 관한 수치해석적 연구

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.

태권도 선수의 4주간의 운동 훈련 중에 상기도 감염증의 이환과 타액 분비형 면역 글로불린 A의 변화와의 관련성

이호성 ( Ho Seong Lee ) 체육과학연구원 2009 체육과학연구 Vol.20 No.4

이 연구는 남자 대학생 태권도선수를 대상(n=31)으로 4주간의 운동 훈련 기간 중에 상기도 감염증의 이환과 타액 분비형 면역 글로불린 A의 변화와의 관련성을 검토하는데 그 목적을 두었다. 타액 채취는 운동 훈련 시작 전(before), 1주일 후(1w), 2주일 후(2w), 3주일 후(3w) 및 4주일 후(4w)에 각각 수집하였으며, URTI에 이환된 피험자는 이환 직후 타액을 추가로 수집하였다. 타액 분비속도는 운동 훈련 전과 운동 훈련 후에, 그리고 비이환자와 이환자 간의 비교에서 어느 시간대에서도 통계적으로 유의한 차이를 나타내지 않았다. 그러나 이환자의 SIgA의 농도는 운동 훈련전과 비교해서 운동 훈련 4주후에 유의하게 낮게 나타났으며(p<.05), SIgA의 분비속도는 운동 훈련전과 비교해서 운동 훈련 3주 및 4주후에 유의하게 낮게 나타났다(p<.05). 또한, 이환자의 SIgA 농도 및 SIgA 분비속도는 비이환자와 비교해서 운동 훈련 1, 2, 3 및 4주 후에 각각 유의하게 낮게 나타났다(p<.05). 이상의 결과, 이 연구에서는 URTI에 이환은 SIgA의 수준의 변화와 밀접한 관련성이 있다는 것을 확인 하였으며, SIgA 수준은 운동선수의 컨디션 평가에 유용하다는 것이 시사되었다. This study investigated the relationship between appearance of upper respiratory tract infection and changes in salivary IgA secretion in male collegiate Taekwondo players (n=31) during exercise training of 4 weeks. Saliva samples were collected before and 1, 2, 3, and 4 weeks after exercise training. In addition, the saliva samples were collected immediately after appeared by URTI symptoms. The changes in Saliva flow rate were not significantly different at time course, and between appearance and non-appearance subjects. However, SIgA concentration in appearance subjects was decreased significantly after 4 weeks of exercise training (p<.05). Similarly, SIgA secretion rate in appearance subjects was decreased significantly after 3 and 4 weeks of exercise training (p<.05). Moreover, SIgA concentration and SIgA secretion rate in appearance subjects were decreased significantly after 1, 2, 3, and 4 weeks of exercise training compared with non-appearance subjects (p<.05). It was confirmed in this study that appearance of URTI may closely correlate with changed SIgA levels, and suggested that SIgA levels may be useful for condition assessment of athletes.

만성 갑상선염과 전신 탈모증을 동반한 20조갑 이영양증

이호성(Ho Seong Lee),김태흥(Tae Heung Kim),박기범(Ki Beom Park) 대한피부과학회 1993 대한피부과학회지 Vol.31 No.2

Twenty-nail dystrophy is a rare entity in which all 20 nail are uniformly and simultaneously affected with excess longitudinal ridging and loss of luster. This condition is thought to be idiopathic but, many cases are associated with alopecia areata, lichen planus, psoriasis, and ichthyosis. In such cases, it has been hypothesized that immunplogical disorders could play a role in pathogenesis. A 29-year-old male patient presented with dystrophic nail chatge on his all finger and toe nails for 3 years. On phisical examination, all nails were uniformly affected with longitudinal ridging and loss of luster and all body hairs were lost. Thyroid scan showed a finding of chronic thyroiditis. Herein we report a case of twenty-nail dystrophy associated with chronic thyroiditis and alopecia areata. (Kor J Dermatol 1993; 31 (2): 245-248)

고령자의 걷기운동의 변화와 특징 및 신체운동기능

이호성(Lee, Ho-Seong),권정현(Kwon, Jung-Hyun),황지현(Hwang, Ji-Hyun) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.2

The present study investigated characteristics and changes in walking, and examined the relationship between physical exercise function in older adults. 89 subjects were participated to 38 older adults group (18 men, 20 women; 72.5 ± 4.3 years), 24 high age group (12 men, 12 women; 61.4 ± 4.2) or 27 low age group (20 men, 7 women; 20.0 ± 0.5). Characteristics in walking were measured by speed and stride of walking, overlapping stride distance, and stride intervals. Walking speed and distance variable were performed a revised form by measuring the subjects height. Physical exercise function were evaluated by anti-gravity, equilibratory, rhythm making, and operating. The following were the main results; Although walking speed in older adults group resulted in no significant differences, walking stride CV (alteration counting) and overlapping stride distance CV resulted in significantly(p<.05) higher changes in older adults group. Walking speed and Functional Reach (FR), walking stride or overlapping stride distance and FR showed significant correlations (+) respectively. In addition, there was significant correlation (-) between walking stride CV and open eyes one step standing. These data indicated that walking in older adults had an unstable feature with a large variability of the walking stride, and suggested that the relationship between variability of the walking stride and equilibrium function.