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개체-관계성 그림표를 이용한 멀티미디어 데이타베이스 시스템의 논리적 모델 설계
주광로 서강정보대학 1991 論文集 Vol.10 No.-
The rapid developments of data processing and computer hardware technologies have made it possible to deal with multimedia data such as text, image, graphics, voice, and video. There have been many researches to represent, store, and manage multimedia data efficently in database area. Many recent approaches tend to compose a large unitary system. Though, this paper proposes an approaches that the architecture of system is derived from the stored data structure. And this paper differentiates the objects of abstraction layers, represents those objects as suitable data schema, and mapps these schema into corresponding structure layers. Also the requirements of MDBMS are surveyed and the logical model using the entity-relationship diagram is proposed.
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주광로,최성복 서강정보대학 1996 論文集 Vol.15 No.-
As the development of infocommunicational technologies and the increase of computer utilization have accelerated the information-oriented society, the security problem of information systems is getting a growing interest and the importance of regulations and procedures for the security problem is increasing. Information systems have to secure the auditability in order to prevent the illegal leakage of information and to track down the violators of control principles. And they also need an audit trail mechanism in order to clarify the information system managers' liabilities and to visualize those users' behaviors. Fundamentally, the audit trail is used as a method for the statistical accountability that tracks down who used which resources in what time and in which order and for the claim of using charge, the maintenance of statistics, the backup and so on. Recently, with the addition of security issues that supervise and log the inappropriate use of system resources, how to track down the illegal access to the information system has become the main issue. In order to construct the audit trail mechanism as above-mentioned, this study proposes a logical model for safe audit logging system based on UNIX system, according to the utility, the security and the perpetuity of audit log and the implantation onto the existing systems.
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주광로 서강전문대학 1994 論文集 Vol.13 No.-
One of the most effective strategies for regional development, the regional informatization is getteing more attention. Through the space free characteristics of the technology of computer and information communication, this trend can be of great help to relieving the central concentration and realizing the balanced ragional developments. Kwangju, relatively retarted area in every point of economy, culture, or society, requires seriously the regional informatization for the balanced regional developments. For the coming age of regionalization, informatization, and internationlization, we need to revitalize our regional economy and elevate residents' living level. To attain this aim, this paper proposes an informatization strategy for the early settlement of informatization through the analysis of cases of several developed nations and the analysis of the realities of information communication in our own country and region.
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Case Review of Impacted Bile Duct Stone at Duodenal Papilla: Detection and Endoscopic Treatment
주광로,차재명,정성원,신현필,이정일,서유진,주선형,방성조 연세대학교의과대학 2010 Yonsei medical journal Vol.51 No.4
Purpose: A bile duct stone impacted at the duodenal papilla is an urgent condition that can rapidly lead to either suppurative cholangitis or acute pancreatitis due to almost complete obstruction of the bilio-pancreatic outflow. This study evaluated the clinical characteristics and results of endoscopic treatment for a bile duct stone impacted at the duodenal papilla. Materials and Methods: Forty-six patients who had been diagnosed with an impacted papillary stone were retrospectively reviewed. Results: The typical features of acute cholangitis (Charcot’s triad) and pancreatitis were only observed only in 10 patients (21.7%) and 17 patients (37.0%), respectively. After the endoscopic retrograde cholangiopancreatography,30 patients (65.2%) were found to have a solitary stone impacting the duodenal papilla and 16 patients had one or more stones in the bile duct. On the radiological studies, the former patients were associated more commonly with no visible stone or no bile duct dilatation (p < 0.05). All impacted papillary stones were successfully removed by endoscopic sphincterotomy: 23 by a needle knife and 23 by a pull type papillotome. The procedure-related complications (n = 7, 4 bleeding, 3pancreatitis) were not serious and did not differ, based on endoscopic findings and the procedure used. Conclusion: A bile duct stone impacted at the duodenal papilla requires both clinical and radiographic evidence to support the diagnosis. Endoscopic sphincterotomy, either with a needle knife or a pull type papillotome,was safe and effective for removing the impacted papillary stone.
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주광로,신현필,김현정,차재명,박종범,이정일 대한소화기내시경학회 2007 Clinical Endoscopy Vol.34 No.3
The Vaterian system consists of the common bile duct and the duct of Wirsung as they conjoin at the level of the duodenum, forming the major papilla of Vater. A double papilla of Vater with separate openings that form the bile duct and the pancreatic duct is a rare anatomic anomaly, which is observed in 0.18% of patients during endoscopic retrograde cholangiopancreatography. When a double papilla is noted, the additional problem is to determine if it is an anatomic variant or a choledochoduodenal fistula. We report two cases of a double papilla; one was associated with choledocholithiasis, and the other was identified incidentally during screening upper gastrointestinal endoscopy. (Korean J Gastrointest Endosc 2007;34:170-173) 총담관과 주췌관은 십이지장면에서 만나 하나의 파터 유두로 개구한다. 중복 유두는 담관과 췌관이 각각 독립적으로 파터 유두로 개구하여 두 개의 유두 형태를 보이는 매우 드문 형태학적 이상으로 내시경 역행성 담췌관조영술을 시행받은 환자의 0.18%로 보고되고 있다. 내시경검사에서 중복 유두가 발견될 경우 이러한 형태학적 이상이 선천적 기형에 의한 것인지 아니면 총담관십이지장 누공에 의한 것인지 감별이 필요하다. 저자들은 최근에 경험한 2예의 중복 유두를 보고하고자 한다. 이 중 한 예는 총담관담석과 동반되었으며, 다른 한 예는 우연히 상부위장관 내시경검사를 통해 발견된 예다.
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치명적 소장 출혈을 동반한 초저위험군의 공장 위장관간질종양 1예
주광로,이정일,홍인택,기혜진,차재명,강재빈 이화여자대학교 의과학연구소 2015 EMJ (Ewha medical journal) Vol.38 No.2
Gastrointestinal stromal tumor (GIST) is the most common mesenchymal neoplasm of the gastrointestinal (GI) tract. These tumors are frequently small, asymptomatic and found incidentally. GI bleeding is a common complication of these tumors, but small sized, very low risk GIST rarely complicated with fatal bleeding. In this report, we describe a 42-year-old woman with a jejunal GIST accompanied by severe GI bleeding. She presented with melena and an angiographic embolization was performed for a jejunal mass with bleeding. However, rebleeding was suspected after an angiographic embolization and an emergent segmental resection for the bleeding mass was performed. She was finally diagnosed as a 1.8 cm sized very low risk GIST in jejunum. In conclusion, physician should consider that even very low risk GIST can be the cause of GI bleeding when there is severe bleeding.
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