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만성 태선양비강증 (苔癬樣粃糠症) 과 가성흑색극세포증 (假性黑色棘細疱症) 이 동반된 1 예
김진권,황영희,국홍일 대한피부과학회 1982 大韓皮膚科學會誌 Vol.20 No.3
Pityriasis lichenoides chronica is considered to be a benign disease. Erythematous yelIowieh scaly maeulea appear insidiously, chiefly on the sides of trunk, thighs and upper arms. Acanthosis nigricans is a rare cutaneous disorder with peak incidence in puberty characterized by hyperkeratosis and, dark pigmentation. We report a case of pityriasis lichenoides chronica associated with pseudoacanthosis nigricans in a 14 year-old obeae male patient who has bean sized erythematoua scaly papules on the trunk and extremities, velvety black brownish colored patchea on the neck and both axillary regions.
웨이블릿 변수화의 최적화를 통한 적응형 조기심실수축 검출 알고리즘
김진권,강대훈,이명호,Kim, Jin-Kwon,Kang, Dae-Hoon,Lee, Myoung-Ho 대한의용생체공학회 2009 의공학회지 Vol.30 No.4
The bio signals essentially have different characteristics in each person. And the main purpose of automatic diagnosis algorithm based on bio signals focuses on discriminating differences of abnormal state from personal differences. In this paper, we propose automatic ECG diagnosis algorithm which discriminates normal heart beats from premature ventricular contraction using optimization of wavelet parameterization to solve that problem. The proposed algorithm optimizes wavelet parameter to let energy of signal be concentrated on specific scale band. We can reduce the personal differences and consequently highlight the differences coming from arrhythmia via this process. The proposed algorithm using ELM as a classifier show high discrimination performance between normal beat and PVC. From the experimental results on MIT-BIH arrhythmia database the performances of the proposed algorithm are 98.1% in accuracy, 93.0% in sensitivity, 96.4% in positive predictivity, and 0.8% in false positive rate. This results are similar or higher then results of existing researches in spite of small human intervention.