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Enterprise JavaBeans(EJB) 컴포넌트의 성능 측정 방법
오창남(Chang-Nam Oh),이긍해(Keung-Hae Lee) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.2Ⅰ
IBM사의 San Francisco 프로젝트 성공이후 컴포넌트 시장은 성장하고 있다. 컴포넌트 기반 개발 방법의 사용이 보편화되면 응용 프로그램은 필요한 컴포넌트들을 조립하여 개발하게 될 것이다. 컴포넌트는 응용프로그램의 성능에 많은 영향을 미치게 된다. 기존의 방법만으로는 컴포넌트의 특징이 고려되지 않기 때문에 분산 컴포넌트의 성능을 비교하는 데에 적합하지 않다. 기존의 컴포넌트 측정방법에는 컴포넌트의 응답시간, 효율(throughput), 메소드(method) 처리 시간, 풀(pool)의 개수에 따른 에러 발생률들이 있다. 본 논문에서는 분산응용을 위한 컴포넌트의 성능을 축정하는 추가적인 방법을 제안한다. 첫째 각 빈들의 처리 응답시간이다. 둘째 트랜잭션의 응답시간이다. 셋째 풀(pool)안에서 객체 개수에 따른 응답시간이다. 객체 수에 따른 컴포넌트 처리 시간이다. 넷째 컴포넌트 알고리즘 처리시간이다. 다섯째 힙(heap) 사용률이다. 이에 컴포넌트 구매자는 성능에 대한 객관적인 데이터로 보고 선택적으로 컴포넌트를 구입할 수 있다.
오창남(Chang Nam Oh),김용주(Yong Joo Kim),강인경(In Kyung Kang),최규철(Kyu Chul Choi) 대한피부과학회 1992 대한피부과학회지 Vol.30 No.6
Idiopathic progressive atrophoderma of Pasini and Pierini(IPAPP) is charcterized by sharply dermatcated, atrophic and slate-gray to brownish patches. We report a 17-year-old female with well-defined, atrophic, and brown colored patched on the abdomen, flank, and back. Histologic finding showed marked thining of dermis with thichening of collagen fibers and fragmentation of elastic fibers. (Kor J Dermatd 1992;30(6):920-923)
김웅(Oong Kim),오창남(Chang Nam Oh),강인경(In Kyung Kang),최규철(Kyu Chul Choi) 대한피부과학회 1995 대한피부과학회지 Vol.33 No.1
Artichia with papular lesions is a rare congenit,al disease characteriezed by the association of alopecia and papular lesions. We report a case of atrichia with papular lesions in 12-year-old. Alopecia of the scalp and eye brows were present at birth. Nurnerous papular lesions are presentation the trunk, buttock and inguinal area. The histopathologic iinding of a papular lesion showed ker till-filled cyst, and eruptive vellous hair cyst. The patient showed reticulat.ed hyperpigmentation on the hands and feet in addition to the characteristic feature of atriclia with papular lesions. (Kor J Dermatc 1995; 33(1): 150-153)
김용주(Yong Joo Kim),오창남(Chang Nam Oh),정병수(Byoung Soo Chung),최규철(Kyu Chul Choi) 대한피부과학회 1992 대한피부과학회지 Vol.30 No.6
Dyschromatosis universalis hereditaria was reported in 1933 by Ichikawa and Hiraga in Japan. This disease is characterized by small pigmented and depigmented mottled macules on the trunk and extremities. We report two cases of dyschromatosis universalis. Case one is a 47-year-old man presented with hypoand hyperpigmented spots on the trunk and extrexities. At about 30 years of age, he started to show pigmentary changes on the back, which became progressively spread to the other parts of the trunk and extremities. Case two is a 27-year-old man with numerous mottled hypo-and hyperpigmented spots on the trunk and extremities. He started to show pigmentary changes on the back about 12 years ago. This pigmentary changes also became progressively spread to the other part of the trunk and extrimities. There were no family history of similar disease. On physical exminations, both patients had hrown rice-grain sized pigmented and depigmented macules without scales and atropy on the trunk and extremites. Fontana-Masson stains revealed decreased and increased melar in granules in the basal cell layers in the hypopigrnented and hyperpigmented lesions respectively. (Kor J Dermatol 1992;30(6):928-931)
피부의 상피세포 종양에서 TGFα , EGF 및 EGF Receptor 발현에 관한 면역조직화학적 연구
최규철(Kyu Chul Choi),윤영곤(Young Kon Yoon),오창남(Chang Nam Oh) 대한피부과학회 1994 대한피부과학회지 Vol.32 No.3
Background : Seversl reporte have demonstrated that TGFa and EGF are mitogenic for keratinocytes. Whether its expressian on epithelial tumors is a marker of malgnancy or signifies an important step in the development of neoplasia is poorly understood. EGF receptors are also present in normal epidermis and epithelial tumors but their physiological roles are not yet understood. Objective : Our purpose was to examine the staining patterns of TGFa, EGF and EGF receptors on the epithelial tumors of the skin., and to investigate the kinetics of expresion of EGF receptors. Methods : We performed immunoperoxidase staining(ABC technique with monoclonal anti-TGFa antibody, polyclonal anti-EGF hntibody and polyclonal anti-EGF recepfor antibody on the formalin-fixed, paraffin-embedded tissue specimens of benign, premalignant and melignant skin tumors. Results : The density of the eixpression of TGFa and EGF was not or elated with the degree of the malignancy of the epithelial tumors and is neither constant in any kind of the tumors. However the infiltrative type of basal cell carcinoma(BCC) is stronger than its solid type on the expression of TGFa and EGF. All benign tumors demonstrated a diffusevattern within tumor lobules. Focal TGFe immunostaining were seen in three of 10 squamous cell carinomas(SCC) and four of 10 BCCs. TGFa immunostaining wias absent from the outermost one to two layers of tumor lobules of all keratoacanthomas. The specimens which increased the expression of TGFc and EGF tended to decrease the expression of EGF receptor. Conclusion : These data suggest that the density of immunohistocherrical expression of TGFa and EGF may be not dependent on the differentiation of tumor cells, and the pattern of immunohistochemical expression of TGFa can differentiate SCC from benign tumors sueh is keratoacanthoma. EGF receptor may be occupied by both of TGFa and EGF. With the receptor bring occupied a down regulation of the receptors may occur which results in decreased EGF receptor expression. (Kor J Dermatol 1994; 32(3): 438-445)
급성 골수성 백혈병과 동반된 급성 발열성 호중구성 피부병 1예
오창남,강인경,최규철 조선대학교 1993 The Medical Journal of Chosun University Vol.18 No.2
Acute febrile neutrophilic dermatosis (Sweet's syndrome) is characterized by painful erythematous plaques, fever, leukocytosis and a dense dermal infiltrate of neutrophils at the site of skin lesion. We presented a case of acute febrile neutrophilic dermatosis in acute myelogenous leukemia in 24-year-old male. Painful and brownish noduloplaques appeared on the face after chemotherapy for acute myelogenous leukemia. Microscopic examination of biopsy specimen disclosed a dense dermal infiltrate composed mainly of neutrophils. Also there were many nuclear dust, but no evidence of true vasculitis.
오정환,오창남,정도혁 대한스포츠의학회 1994 대한스포츠의학회지 Vol.12 No.2
Injuries to the sternoclavicular joint are not frequent, and the posterior dislocation of the sternoclavicular joint is much more rare. As the diagnosis is not easy with simple radiographic technique, special techniques are required. A case of the traumatic posterior dislocation of the sternoclavicular joint had been reported in our literature up to now. We also experienced a case of the retrosternal dislocation of the clavicle which had been caused by a ski injury and had a satisfactory clinical result with a closed reduction in a long-term follow-up. So we are reporting this case with a review of the literatures along with the injury mechanism.