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임영석(Young Seok Lim),류지곤(Ji Kon Ryu),이한주(Han Chu Lee),김용태(Yong Tae Kim),윤용범(Yong Bum Yoon),김정룡(Chung Yong Kim) 대한소화기학회 1997 대한소화기학회지 Vol.29 No.5
N/A Background/Aims: About ten to twenty percent of patients with acute pancreatitis progress to pancreatic necrosis. Little is known about the etiology of necrotizing pancreatitis. It has been suggested that even in the necrotizing pancreatitis group, the prognosis of patients vary greatly according to the degree of necrosis of the pancreas. Methods: We investigated retrospectively the etiology and predictive value of four prognostic indicators (Ransons criteria, APACHE-II score, analysis of peritoneal fluid, CT severity index) in fourteen patients with necrotizing pancreatitis who were admitted to Seoul National University Hospital from Jan. 1987 to Jun. 19!)5. Results: The most common cause was alcohol(9 patients), and no case was associated with cholelithiasis. Of the fourteen patients, five died, and three had more than 3 major complications. In contrast, another six patients had less than 2 complications. The sensitivity and specificity for prediction of serious prognosis (death or more than 3 major complications) of four prognostic indicators were all more than 70%, however, the CT severity index was most valuable. There were. Significant correlation between the CT severity index and Ransons criteria and analysis of peritoneal fluid. Conclusions: Alcohol seems to be the leading etiologic factor in necrotizing pancreatitis, and all prognostic indicators were effective for the prediction of serious prognosis. However, in the case of severe acute pancreatitis, the contrast enhanced dynamic CT(CECT) scan should be performed and proper management is necessary. (Korean J Gastroenterol 1997;29:667-677)
임영석(Young-Seok Lim),이강표(Kang-Pyo Lee),김현우(Hyun-Woo Kim),안재민(Jae-Min Ahn),김형주(Hyoung-Joo Kim) 한국정보과학회 2011 정보과학회 컴퓨팅의 실제 논문지 Vol.17 No.3
웹2.0 기술의 출현과 함께 소셜 태깅 서비스들이 큰 호응을 얻고 있다. 태깅에서 사용되는 태그들은 웹상의 자원들을 기술하는 단순한 키워드들의 나열이다. 구조는 단순하지만 많은 사용자들에 의해 협력적으로 생산되는 특성으로 인해 문서를 잘 추상화하므로, 정보 검색 분야에 있어 유용한 메타데이터로서 여겨진다. 특히 검색의 성능을 향상시키기 위해 태그를 사용하는 연구들이 최근 들어 활발하게 진행되어 왔다. 태그는 그 태그를 부여하는 사용자의 참여 정도에 따라 메타데이터로서의 품질이 확연하게 달라지며, 보다 활동적인 사용자도 존재하고 덜 활동적인 사용자도 존재한다. 이로 인해 사용자들의 활동성은 태그를 이용한 검색 결과에도 영향을 미치게 된다. 본 논문에서는 사용자들의 참여 정도를 고려하여 검색 성능을 개선하기 위해 소셜 태깅 서비스인 del.icio.us의 사용자들을 활동성 관점에서 관찰하였다. 그리고 이를 바탕으로 개개인의 다양한 사용자 활동을 모델링하는 방법을 제안하였다. 또한 이를 통해 사용자들의 활동성을 점수화하여 검색에 활용함으로써 검색을 개선하는 방법을 제안한다. 끝으로 제안하는 알고리즘이 실제 검색의 만족도를 향상시킬 수 있음을 실험을 통해 확인하였다. With the advent of Web 2.0 technologies, social tagging service has gained a great popularity. The tags used in tagging systems are a simple list of keywords describing the resources on the web. Even though their structure is simple, tags abstract documents well and are regarded as useful metadata in the field of information retrieval, since they are produced cooperatively by many users. Specially, to improve the performance of search, a number of approaches using tags have been active to date. Depending on the participation of the users to assign the tags, the quality of tags as metadata varies remarkably. Furthermore more active and less active users exist. Because of this, the activeness of each user assigning the tags will also affect the search results. In this paper, we consider the degree of user participation in order to improve the search performance. We observe the del.icio.us social tagging service, from the perspective of the users activeness. And we propose a modeling for a variety of individual user activities. In addition, we propose an algorithm improving tag search by scoring the user activeness. Finally, we evaluate the proposed method to verify improving the satisfaction of the actual search through experiments.
임영석(Lim, Young-Seok),강윤묵(Kang, Yoon-Mook),김원목(Kim, Won-Mok),김동환(Kim, Dong-Hwan) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
We fabricated hexagonal copper sulfide Cu₂S nanowires to obtain a larger contact area of Cu₂S/CdS solar cell. Copper sulfide nanowires were grown on Cu foil at room temperature by gas-sol id reaction. The size, density and shape of nanowires seemed to be affected by the change or reaction time temperature, crystallographic orientation of Cu foil, and molar ratio of the mixed gas. We controled the length and the diameter of the nanowires and we obtained suitable nanowire arrays which has fitting size for uniform deposition with n-type CdS. CdS layer was deposited on the nanowire array by electrodeposition and it seemed to be uniform. The Cu₂S/CdS nanowires/CdS junction showed diode characteristics, A large contact area is expected with the Cu₂S/CdS nanowire structure as compared with the Cu₂S/CdS thin film.
한국인 간세포암 환자들의 임상특징 및 예후: 전국규모 무작위 표본 추출 조사사업 결과
임영석 ( Young Suk Lim ),신동현 ( Dong Hyun Sinn ),김승형 ( Seung Hyung Kim ),황재석 ( Jae Seok Hwang ),한광협 ( Kwang Hyub Han ) 대한간암학회 2014 대한간암학회지 Vol.14 No.2
Background/Aims: Given the high incidence and mortality rate of hepatocellular carcinoma (HCC), ensuring high quality of registry data is important for the improvement of health service. Registries by voluntary reporting often lack case completeness and may cause selection bias. A statutory Korean Central Cancer Registry (KCCR) has case completeness and provides accurate information on HCC incidence, but provides limited information about HCC characteristics. Methods: The Korean Liver Cancer Study Group (KLCSG) and the KCCR jointly built a nationwide cohort of patients who were diagnosed with HCC between 2003 and 2005. Out of 31,521 new HCC cases that were registered at the KCCR between 2003 and 2005, 4,630 cases (14.7% of total HCC cases) were randomly selected and abstracted from 32 hospitals nationwide, and followed up until December 2011. After excluding 110 patients who met the exclusion criteria, a total of 4,520 HCC patients were analyzed. Results: Mean age at the diagnosis of HCC was 57.1±10.8 years, and males comprised 81.0%. Hepatitis B was the predominant etiology (72%), and hepatitis C comprised 12%. Stage at diagnosis was 10%, 43%, 28%, 11% and 8% for modified International Union Against Cancer (mUICC) stages I, II, III, IV-A and IV-B, respectively. Initial treatment modalities were transarterial therapy in 53%, surgical resection in 10%, local ablation in 7%, and liver transplantation in 1%. The median survival was 1.4 years, and the 1-, 3-, and 5-year survival rates were 56%, 35% and 27%, respectively. Age, gender, Child-Pugh class, etiology, tumor stage at diagnosis, and treatment modality were factors independently related to survival. Conclusions: About half of HCC patients are diagnosed at advanced stages in Korea. Curativeintent treatments are rarely applied to patients. This data provides unbiased information about the characteristics and outcome of HCC patients in Korea. (J Liver Cancer 2014;14:97- 107)