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수장 . 족저부의 표피낭종 - 임상 및 조직학적 연구 -
한광호,문상은,조광현 ( Kwang Ho Han,Sang Eun Moon,Kwang Hyun Cho ) 대한피부과학회 1997 大韓皮膚科學會誌 Vol.35 No.3
Background: Although palmoplantar epidermal cysts have long been associated with develop ment following implantation of an epidermal fragment as a result of a penetrating or blunt injury, the pathogenic mechanism is still not fully understood. Since 1987, many cases have been reported in which human papillomavirus(HPV) could be associated with palmoplantar epidermal cysts. Objective : In this study, we evaluated the clinicopathological findings of palmoplantar epidermal cysts and investigated them for the presence of HPV in order to examine the role of HPV in the pathogenesis of this disorder in Korea. Methods : The clinical, histological, immunohistochemical studies were performed on seven cases of plantar cysts, and two cases of palmar cysts. Results : No previous trauma history was seen. Histopathologically, parakeratotic nuclei, or vacuolar strutures within the keratinous mass in the cyst cavity were found. However, we could not find intracytoplasirnic eosinophilic bodies in the wall, the cyst content, or the overlying epidermis. The dyskeratotic keratinocytes were observed in 3 cases. Papillomavirus common antigens were not detected by immunohissochemical staining. Conclusions . Palmoplantar epidermal cysts in Korea have some different histological features compared to those of HPV 60-associated cases in Japan and we could not detect the immunohistochemical evidence of HPV infection in our cases. (Kor J Dermatol 1997;35(3): 507-513)
기업의 부동산보유가 기업가치에 미치는 영향 - 기업지배구조에 따른 차이 -
한광호(Gwang Ho Han),한혜은(Hye Eun Han),노승한(Seung Han Ro) 한국감정원 연구개발실 2021 부동산분석 Vol.7 No.3
대리인 이론에 따르면 경영진에 대한 높은 수준의 모니터링은 경영진의 대리인 문제를 완화하여 기업가치를 높인다. 이러한 관점에서 본 연구는 높은 수준의 기업지배구조가 기업이 보유한 부동산이 기업가치에 미치는 부정적인 영향력을 상쇄할 수 있는지 분석한다. 우리의 분석 결과는 다음과 같다. 첫째, KOSPI 기업이 보유한 사업용 부동산은 기업가치에 영향을 미치지 않는다. 그러나 KOSDAQ 기업이 보유한 사업용 부동산은 기업가치에 부정적이다. 또한, 투자용 부동산은 KOSPI 및 KOSDAQ 기업의 기업가치에 부정적이다. 둘째, 우수한 기업지배구조를 갖춘 기업이 보유한 투자부동산은 기업가치에 긍정적이지만, 낮은 수준의 기업지배구조를 갖춘 기업의 투자부동산은 기업가치에 부정적이다. 이러한 결과는 우수한 지배구조를 갖춘 기업의 부동산 투자 결정은 주주가치를 극대화하는 합리적인 의사결정일 수 있다는 것이다. 우리의 연구 결과는 기업지배구조의 개선을 통해 기업부동산이 유발하는 대리인 문제를 완화할 수 있음을 시사한다. According to the agency theory, a high-quality monitoring system can reduce self-interest of a manager and increase firm value. In this perspective, the study investigates whether a high-level of corporate governance can offset negative effects of corporate own real estate on firm value. The findings are as followed; First, it is found that KOSPI firms" real estate for operations does not have any effect on their firm value. However, KOSDAQ firms" real estate for operations has negative effects on their firm value. In addition, real estate for investment has negative effects on the firm value of both KOSPI and KOSDAQ. Second, real estate for investment owned by a firm with high quality governance is positively related to its firm value. However, real estate for investment owned by a firm with bad quality governance is negatively related to its firm value. Consequently, the real estate investment decision made by a firm with high-quality governance can be a rational decision to maximize shareholder-value, irrespective of agency problem. The finding shows that corporate governance is an effective measure to control agency problems induced through corporate real estate.
한광호(Kwang Ho Han),이철희(Chul-Hee Lee) 유공압건설기계학회 2021 드라이브·컨트롤 Vol.18 No.4
A personal mobility withstanding function for the disabled and vulnerable groups with difficulties in mobility was developed and structural and dynamics analysis was conducted. Personal mobility devices are a very helpful means of transportation for the disabled and vulnerable groups. In addition, the standing function allows individuals to perform a difficult task in while seated and offers a medical advantage to the user. In this study, a personal mobility device was designed and developed to help vulnerable groups and disabled people overcome limited mobility, and communicate with the general people at eye level through standing functions. Through structural and dynamic analysis, the structural safety, optimal speed during rotation, and lateral acceleration of the personal mobility device was analyzed. The analysis results are expected to contribute to the improvement of the users’ convenience and stability of personal mobility.