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황정연,고재욱,Hwang Jung-Yun,Ko Jae-Ook 대한임상독성학회 2003 대한임상독성학회지 Vol.1 No.1
Objective: This study was conducted for the nationwide statistical survey of poison exposure to provide the rationale for establishing and developing the poison control center (PCC) in Korea. Design: Study group for Korea PCC in National Medical Center reviewed the medical literature on poison exposure of Korea from death reports of National Statistical Office (NSO), the toxic exposure statistics from the report of National Health Insurance Corporation (NHIC), and poison related data from 119 ambulance services (FD) for the purpose of obtaining the poison and its related data. We also conducted questionnaire from the expert who work in emergency medicine department at the designated 320 emergency medical centers in Korea for the preparedness and acknowledgement about necessity of PCC and their need for that. Results: We reviewed the reliable data from the death report of NSO, poison exposure data from NHIC, and running report from FD. Poisoning death occured at home ($36.7\%$) and hospital ($46.3\%$). Poisoning are more common in rural area than the city area. Patients were seen more frequently in the local clinics than in any hospital. The drugs ($45.7\%$) and pesticide ($18.1\%$) are common poison. Common place to poison exposure were residential area ($39.9\%$), industry ($9\%$). mass residential area ($7\%$). and farm ($6\%$). The education level were primary school ($33.2\%$), high school ($23.7\%$), and middle schol ($21.3\%$) in order. We have to provide the poison guideline for lay public to understand easily, and for medical experts. The medical facilities need to be invested and have more interest for toxicology. All medical staff who work in the designated emergency medical center want PCC to establish. They want to have poison information from hospital ($91.3\%$), regional poison information center ($45.0\%$), regional poison control center ($52.5\%$), nationwide poison information center ($48.8\%$), nationwide poison control center ($46.25\%$), as a role of poison control center. They also want that pcc have poison epidemiologic study and statstics, training program for the experts, registration of rare case of posion on website, reflection of policies to activities for antidote production etc., speedy consultation system for poison analysis, public education, establishment of both regional and national pee, etc. Conclusion: Poison center must be established to provide poison information for all the public and medical experitise, focusing rural area and private clinic, to detoxify, to reduce the cost, time, morbity, and mortality through the whole country.
항공 응용 분야 : 패리티 캐시를 이용한 DDR 메모리 저장 장치용 RAID 레벨 5의 성능 분석
황정연 ( Jung Yeon Hwang ),구본근 ( Bon Gen Gu ),정승국 ( Seung Kook Cheong ),곽유식 ( Yun Sik Kwak ) 한국항행학회 2010 韓國航行學會論文誌 Vol.14 No.6
본 논문에서는 DDR 메모리 기반의 저장 장치로 구성되는 패리티 캐시를 이용한 RAID 레벨-5의 성능을 시뮬레이션을 통해 분석하였다. 시뮬레이션을 위해 본 논문에서는 시뮬레이션 모델을 개발하고, 시뮬레이션을 통해 획득하고자 하는 성능 분석 자료를 도출하였다. 또 본 논문에서 개발한 시뮬레이션 모델을 기반으로 시뮬레이터를 구현하였으며, 이를 이용하여 다양한 파라미터를 이용하여 시뮬레이션을 수행하였다. 시뮬레이션 결과에 따라 응용 분야의 스토리지 접근 패턴을 튜닝하면 DDR 메모리 기반의 저장 장치로 구성되며 패리티 캐시를 이용한 RAID 레벨-5 스토리지 시스템이 효과적으로 이용될 수 있을 것으로 기대된다. In this paper, we analyze the performance of the parity cache enabled RAID level-5 via the simulation. This RAID system consists of the DDR memory-based storage devices. To do this, we develop the simulation model and suggest the basic performance analysis data which we want to get via the simulation. And we implement the simulator based on the simulation model and execute the simulator. From the result of the simulation, we expect that the parity cache enabled RAID level-5 configured by the DDR memory based storage devices has the positive effectiveness to the enhancing of the storage system performance if the storage access patterns of applications are tuned.
이지현,정연화,조봉혜,황대석,Lee, Ji-Hyun,Jung, Yun-Hoa,Cho, Bong-Hae,Hwang, Dae-Seok 대한영상치의학회 2010 Imaging Science in Dentistry Vol.40 No.1
Purpose : The purpose of this study was to evaluate the diagnostic efficacy of panoramic radiographs for detection of mandibular fractures. Materials and Methods : The sample was comprised of 65 patients (55 fractured, 10 non-fractured) with 92 fracture sites confirmed by multi-detector computed tomography (CT). Panoramic radiographs were evaluated for mandibular fractures by six examiners; two oral & maxillofacial radiologists (observer A&B), two oral & maxillofacial surgeons (observer C&D), and two general dentists (observer E&F). Results : Sensitivity of panoramic radiography for mandibular fractures was 95.7% in observer A&B, 93.5% in observer C&D and 80.4% in observer E&F. The lowest sensitivity was shown in symphyseal/parasymphyseal areas, followed by subcondylar/condylar regions. Conclusion : Panoramic radiography is adequate for detection of mandibular fractures. However, additional multidetector CT is recommended to ascertain some indecisive fractures of symphysis and condyle, and in complicated fractures.
이윤경(Yun-kyung Lee),황정연(Jung Yeon Hwang),정병호(Byung Ho Chung),김정녀(Jeong Nyeo Kim) 한국정보보호학회 2011 정보보호학회논문지 Vol.21 No.5
인터넷 이용자의 개인정보 유출 및 인터넷에서의 행적이 연결되는 등의 프라이버시 침해에 관한 논란이 끊이지 않고 있으며, 이를 해결하기 위한 다양한 방법들이 제시되고 있지만, 가장 효율적인 개인정보보호 방법으로 익명성을 제공하는 인증, 접근제어, 지불 메커니즘을 들 수 있다. 따라서, 본 논문에서는 사용자의 익명성을 보장하면서 인증을 하고 이와 함께 접근제어를 할 수 있는 효과적인 방법을 제안한다. 제안 기법은 핵심 프리미티브로 그룹서명 기법을 이용하며, 접근제어를 위한 익명자격증명서를 도입하고, 관련된 익명 인증 및 자격정보를 상호 결합한다. 정당한 사용자는 키 발급 절차를 통해 합법적으로 그룹 서명키를 얻은 후 자신의 자격에 대한 익명자격증명서를 발급받고, 이를 이용함으로써 익명 인증 및 접근제어를 제공하는 웹서비스를 안전하고 편리하게 사용할 수 있다. 익명자격증명서는 응용환경에 따라 유연하게 확장하여 사용할 수 있으며 익명자격증명서를 지불토큰으로 이용하여 익명 지불 기법에 활용할 수도 있다. There's a controversy about an invasion of privacy which includes a leakage of private information and linking of user's behavior on internet. Although many solutions for this problem are proposed, we think anonymous authentication, authorization, and payment mechanism is the best solution for this problem. In this paper, we propose an effective anonymity-based method that achieves not only authentication but also authorization. Our proposed method uses anonymous qualification certificate and group signature method as an underlying primitive, and combines anonymous authentication and qualification information. An eligible user is legitimately issued a group member key pair through key issuing process and issued some qualification certificates anonymously, and then, he can take the safe and convenience web service which supplies anonymous authentication and authorization. The qualification certificate can be expanded according to application environment and it can be used as payment token.