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김진철(Jin Cheol Kim),오영환(Young Whan Oh) 한국IT서비스학회 2004 한국IT서비스학회지 Vol.3 No.2
As the e-Commerce based on the XML technology is getting bigger, user authentication, integrity, non-repudiation and confidentiality has become important for security. Since the XML technology is widely used for exchanging information among the internet e-business systems, the security of XML documents is essentially required and XML digital signature should be supported. To support the digital signature of XML documents. W3C proposed the XML-Signature pecification as an international standard that describes five transform algorithms. In this paper, we design and implementt a XML/PKI based digital tax invoice system. Our system supports the five trarsforming algorithms defined in the XML-Signature specification and exchanges digital tax invoices among enterprises securely. We design and implement the flexible and efficient system consists of reusable components using CBD(Component Based Development).
오영환,임풍,이종건 大韓成形外科學會 1989 Archives of Plastic Surgery Vol.16 No.2
Postoperative hepatitis was not common disease. Although the cause of it was still controversy, contributing factors were supposed hepatotoxic agents, hypoxia, preexisting liver disease, malnutrition and viral hepatitis. We had experience the postoperative hepatitis at 5 patients, 4 patients were facial bone fracture, 1 patient was skin defect. Clinical features were as follows; 1. Clinical manifestations were nausea, vomiting, abdominal discomfort, general weakness. 2. The most characteristic feature was delayed fever pattern. On the 7-10th postoperative day, sudden night fever (over 39℃) was developed. 3. Simultaneously marked impairment of liver function tests were noted. After careful medical treatment, they were discharged with symptomatic improvement and nearly normal liver function tests.
화상을 입힌 흰쥐에서 장관내 Candida albicans 전위에 대한 Ketoconazole의 예방적 효과
정성한,조성필,한기택,오영환,임 풍 大韓成形外科學會 1994 Archives of Plastic Surgery Vol.21 No.4
Despite of many advances in both topical and systemic control of infections, candida sepsis continues to be a serious complication following major thermal injury. The translocation of enteric C. albicans may be occured to be associate with major burn injuries. Ketoconazole is an oral antifungal agent that has been effective in the treatment of many fungal infections. However, the results of prophylactic clinical and laboratory trials using ketoconazole have been inconsistent. The aim of this study is to determine the prophylactic effect of oral ketoconazole on the translocation of enteric C. albicans in major burn injuries. Normal rate recieved ketoconazole (10㎎/㎏/day) 24 hours prior to a 40% scald burn and were challenged intragastrically with C. albicans 1 hour prior to the burn in a ketoconazole - candida treated group. Tissues were harvested from the mesenteric lymph node, liver, spleen and cecum on the 1st and 4th postburn days and cultured on Sabouraud dextrose agar and then stained with periodic-acid Schiff (PAS) to observe the translocation of C. albicans. All findings were compared with those of each control(40% scald burn) and candida treated(gavage with C. albicans+40% scald burn) group. The results were as follows ; 1. There was no translocation of C. albicans to mesenteric lymph node or other organs in the control group. In the ketoconazolee-candida treated group, C. albicans were found in only the mesenteric lymph node on the l st postburn day, but they tanslocated to the liver and spleen on the 4th postburn day. In the candida treated group, C. albicans were observed in all examined organs on the 1st postburn day and the rate of translocation incresed on the 4th postburn day. The translocation of C. albicans in the candida treated group increased more significantly than that of the ketoconazole-candida treated group. 2. On microscopic examination, C. albicans seems to have passed through the intestinal mucosal barrier and then they were phagocytized by macrophages in the laminal propria. Also most C. albicans which had infiltrated into the other organs were phagocytized by macrophages. In the candida treated group, C. albicans had infiltrated into the organs at a greater rate than that of the ketoconazole-candida treated group. With these result, ketoconazole reduced the translocation rate of enteric C. albicans in major burn injures. But more study will be necessary to determine the relationship between the degree of translocation.