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RISS 인기검색어
- 검색키워드
- 저자 : 김수찬 ( Soo-Chan Kim ) (검색결과 151 건)
- 무료
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신경망을 이용한 휴대전화에 의한 RF 노출 평가 모델의 개발
김수찬,남기창,안선희,김덕원,Kim Soo-Chan,Nam Ki-Chang,Ahn Seon-Hui,Kim Deok-Won 한국전자파학회 2004 한국전자파학회논문지 Vol.15 No.10
The wide and growing use of cellular phones has raised the question about the possible health risks associated with radio-frequency electromagnetic fields. It would be helpful for phone users to blow the exposure levels during cellular phone use. But it is very difficult to recognize the amount of exposure, because measuring accurate level of RF is a difficult matter. In this study, we developed a model to estimate the exposure level and the individual risk of exposure by utilizing the available informations that we can get. We used such parameters as usage time a day, total using period, distance between cellular phone and head, slope of cellular phone, hands-free usage, antenna pulled out or not SAR(Specific Absorption Rate) of cellular phone, and flip or folder type. We proposed a model presenting individual risk of RF exposure from level 0 to 10 by using a neural network.
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적응 SFLC(Scaled Fourier Linear Combiner)를 이용한 활동 중의 PPG 신호의 잡음 감소
金守贊(Soo-Chan Kim),金性珉(Sung-Min Kim),車殷宗(Eun-Jong Cha),金德源(Deok-Won Kim),柳在河(Jae-Ha Yoo),金東淵(Dong-Yon Kim) 대한전기학회 2006 전기학회논문지 D Vol.55 No.3
Blood flow is one of vital signals related to human physiological information. Photoplethysmograph (PPG) has been used to measure indirectly heart rate, blood oxygen saturation (SpO₂), and so on. Because PPG signal is weak and sensitive to motion artifacts, it is very important to continuously obtain stable PPG signal during free movement. In this study, we applied the scaled Fourier linear combiner (SFLC) using both the adaptive filter and FLC to remove effectively the motion artifacts as well as background noise in the real time without additional signal correlated with motion from a accelerometer. The proposed method would be useful to reduce the movement and background noise which are not synchronized with heart rate.
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Symposium 2-2-3 (SYP 2-2-3) : Localized blistering associated with reticular pigmentation
김수찬 ( Soo Chan Kim ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1
A 26-year-old male patient presented with localized blistering since birth, accompanied with patchy, reticulated hyperpigmentation on the flexural areas since mid-teenage. He also showed mild palmoplantar keratoderma and diffuse alopecia on the scalp. Histopathology revealed intraepidermal blistering with degeneration of basal keratinocytes. Direct immunofluorescence showed negative result and immunofluorescence mapping showed KRT5, KRT10, collagen 4 & 7 deposition on the dermal side of the blister. Electron microscopy showed cytolysis and keratin clumping in the epidermis. Increased numbers of melanosomes in keratinocytes and dermal melanophages were also shown. Genetic analysis showed a mutation in KRT14 (exon1 c.374C>C, p.Arg125Cys), which is most commonly reported in the subtype previously known as EBS-DM.
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Expert Lecture 1-2 : Diagnostic approaches of bullous diseases
김수찬 ( Soo Chan Kim ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.1
Blistering diseases are heterogeneous and include many diverse disorders. Over the past three decades, with the availability of new investigatory techniques and more sophisticated laboratory methods, enormous progress has been made in understanding these diseases. Blistering diseases can be mainly divided into the autoimmune bullous diseases and inherited bullous diseases. To do make a correct diagnosis of these blistering disorders, one should apply four different techniques: the clinical, histological, immunological and molecular biological methods. Histologic methods include H&E stain, immunohistochemical stains and electron microscopic examinations. Immunological methods include direct and indirect immunofluorescence studies, and ELISA. Molecular biological methods include immunoblotting and immunoprecipitation.
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알레르기성 접촉피부염이 유발된 마우스 표피세포의 림프구 자극능력
김수찬(Soo Chan Kim),황선영(Seon Young Hwang) 대한피부과학회 1989 대한피부과학회지 Vol.27 No.6
Allergic contact dermatitis is a prototype of delayed hypersensitivity reaction. Langerhans cells, keratinocytes and T lyrnphocytes play major roles in the pathogenesis of allergic contact dermatitis. We observed Langerhans cells and keratinocytes in contact sensitized epidermal sheets of mice and performed mixed epidermal cell lymphocytes reaction with normal epidermal cells and contact sensitized epidermal cells to determine the lymphocyte stimulating capacity of contact sensitized epidermal cell. We obtained following results : 1. The Langerhans cells were decreased in number and morphologically damaged in contact sensitized epidermis. 2. Ia antigen expression on keratinocytes was detected in almost all contact sensitized epidermal sheets. 3. The allogeneic lymphocyte stimulating capacity of contact sensitized epidermal cells was greater than that of normal epidermal cells. 4. The allogeneic lymphocyte stimulating capacity of contact sensitized epiderrnal cells was lost after treatment of epidermal cells with anti Ia antibody and complement. From these results, it is conceivable that the contact sensitized epidermal cells can amplify the immune reactions by stimulating the lynphocytes which are infiltrated in contact sensitized epidermis.
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