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대상포진 환자에서 T 림프구 아형 및 회상항원에 대한 관찰
서석배,김광중,이종주 ( Suk Bae Suh,Kwang Joong Kim,Chong Ju Lee ) 대한피부과학회 1997 大韓皮膚科學會誌 Vol.35 No.6
Background: The incidence of herpes zoster is higher among patients with impaired cell mediat,ed immunity. Herpes zoster skin lesions frequently become more severe and run a more protracted course in such patients. Objective : This study aimed to firstly elucidate whether there are changes in cell mediated immunity, even in immunocompetent, patients with herpes zoster, and secondly to investigate relationships between these change and the clinical appearance of herpes zoster. Methods : T lymphocyte sub;et,s in peripheral blood and delayed hypersensitivity reactions using the Multitest CMI kit were measured in 33 healthy patients with herpes zoster and 28 controls. Results : As compared with controls, there was a slight decrease in percentages of CD4 lym-phocytes, a significant decr eas in percentages of CD8 lyrnphocytes, and a slight increase in CD4/ CD8 ratios in the acute phasr of herpes zoster. The percentages of CD3 lymphocytes were also significantly decreased. Baseg i)n the severit,y of the skin lesion, t.her e was a significant increase in duration of acute herpetic pain. However, there were no signigicant differences in percentages of T lymphocyte subsets based on the severity of skin lesion and duration of acute horpetic pain. In delayed hypersensitivity rea.tions with the Multitest CMI kit, the intensity and frequencies of positive reactions were signific,intly decreased in the patients group. Conclusions . There are sigr.ificant changes in peripheral blood T lymphocyte subsets and delayed hypersensitivity reactions even in other wise healthy patients. (Korean J Dermatol 1997;35(9): 1066-1073)
통신해양기상위성 기하보정 영상의 라인 별 수신시각 계산
서석배,안상일,SEO, Seok-Bae,AHN, Sang-Il 항공우주시스템공학회 2009 항공우주시스템공학회지 Vol.3 No.2
MI LV1B images, geometric corrected data of COMS MI, has no time information per each line, but field of weather prediction using the MI LV1B images needs time information on it. This paper explains two calculation methods for receiving time on lines of MI LV1B images and analyzes difference between two calculation methods using simulated data.
멀티미디어 정보검색에 적합한 영상정보의 벡터 양자화 코드북 설계 및 특징추출
서석배,김대진,강대성,Seo, Seok-Bae,Kim, Dae-Jin,Kang, Dae-Seong 대한전자공학회 1999 電子工學會論文誌, S Vol.s36 No.8
본 논문에서는 멀티미디어 정보검색을 위하여 영상정보의 특징추출에 적합한 벡터 양자화 코드북 설계 방법을 제안한다. 기존의 벡터 양자화의 경우 영상에 대한 특징을 추출할 경우 보통 영상을 복원한 다음 수행하므로 많은 시간과 메모리가 소요되며, DCT(discrete cosine transform)를 이용한 방법처럼 블록화 현상을 동반한다. 이를 개선하기 위하여 본 논문에서는 웨이브렛 변환과 주성분 해석을 이용한 벡터 양자화 코드북 설계 방법을 제안한다. 웨이브렛 변환은 높은 압축률에서도 블록화 없는 영상을 복원하기 위해서 도입되었으며, 주성분해석은 데이터를 여러 그룹으로 분할하기 위해 도입되었다. 신경회로만인 SOM(self-organizing map)을 이용한 벡터 양자화와 비교실험에서 비슷한 성능을 보이면서도 처리 시간을 대폭 단축시킬 수 있음을 볼 수 있었다. In this paper, the codebook design method of VQ (vector quantization) is proposed an method to extract feature data of image for multimedia information searching. Conventional VQ codebook design methods are unsuitable to extract the feature data of images because they have too much computation time, memory for vector decoding and blocking effects like DCT (discrete cosine transform). The proposed design method is consists of the feature extraction by WT (wavelet transform) and the data group divide method by PCA (principal component analysis). WT is introduced to remove the blocking effect of an image with high compressing ratio. Computer simulations show that the proposed method has the better performance in processing speed than the VQ design method using SOM (self-organizing map).