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한국산 집먼지진드기 진중체 항원 알레르겐 표준화 : In vivo 방법에 의한 표준화
김철우,박중원,홍천수 (Cheol Woo Kim,Jung Won Park,Chein Soo Hong) 대한천식알레르기학회 1998 천식 및 알레르기 Vol.18 No.2
Backgound and objective. House dust mites have been known as the most important allergens in respiratory allergic disease. Since environmental factors may have influences on the pathogenesis of allergic disease, the study using Korean house dust mites for immune and biologic reactions in house dust mite-sensitive allergic disease is considered as significant. Material and method: We made two in-house allergenic extracts of Korean house dust mites (D. farinae and D. pteronpsssinus) and performed this study for the allergen standardization by in vivo methods and for the evaluation of the reliabilities for clinical applications. Result: As a results of biologic standardization using skin prick test teachnique, the activity of 1: 1,500w/v of D. farinae extract was estimated 1,000 biology unit(BU), concentration that elicits a wheal of the same size as that of histamine dihydrochloride 1mg/ml. The activity of 1: 1,000w/v of D. pteronyssinus was condiered as 1,000BU. The activity of 1:100w/v of both D. farinae and D. pteronpssiuns extracts were considered as 100,000 Allergy Unit(AU), based on intradermal skin testing of 30 subjects with strong sensitive reaction. The concordant rates between results of skin prick test done with 5,000BU/ml concentration of in-house allergenic extracts and thoae with the commercially available allergen(Bencard Co., UK) were 84.6% and 81.0% for D. farinae and D. pteronpssinus, respectively. The wheal erythema size and A/H ratios induced by in-house extracts were significantly correlated with those induced by Bencard allergen. Conclmion '. This results suggest that in-house extracts of the whole bodies of two house dust mites have good allergenic activities in vivo. It is considered to be clinically useful and reliable allergenic extracts.
김철우,김영조,Kim, Cheol-Woo,Kim, Young-Cho 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.9
A measurement method of the particle-based reflective display is proposed, estimated, and compared with reported method. The reflectivity measurement by previous studies is simply obtained by integrating sphere, but it has a limitation for the estimation of real moving particles because its data include surface reflection and incomplete attachment on electrodes. To get the number of real moving particles, the area by attached particles on the electrodes is calculated at microscopic signals. The moving particles on subthreshold voltage are observed and this fluctuational variation of surface on subthreshold voltage gives a tip to understand the driving mechanism. By this measurement we ascertained the relationship of a particle layer and real driving particles, and the feasibility of observation and estimation for moving color particles, which were measured by the reflectivity and CIE (Commission Internationale de I'Eclairage) system of color specification at previous studies.
이개부 병변을 가진 하악 대구치의 치료에 있어 치근절제술과 터널화의 임상결과 비교
김철우,박진우,서조영,이재목,Kim, Cheol-Woo,Park, Jin-Woo,Suh, Jo-Young,Lee, Jae-Mok 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.1
Purpose: The resective treatment in mandibular Degree III furcation areas includes root resection and tunnel preparation. The purpose of this retrospective study is to evaluate which treatment procedure(root resection vs tunnel preparation) has more favorable prognosis in mandibular Degree III furcation involvement. Materials and methods: The subjects of this study were patients who were treated their mandibular posteriors with either root resection(22 teeth on 22 patients) or tunnel preparation(24 teeth on 22 patients) and have participated in periodic recall check program for at least 2 years. Failure rate, plaque index, bleeding on probing and probing pocket depth were measured and the results were compared and statistically analysed. Results: Failure rates of root resection and tunnel praparation were 13.6% and 16.7%, respectively, and showed no significant difference between two procedures. No significant differences were observed between two procedures with respect to plaque index, bleeding on probing and probing pocket depth. Conclusion: root resection and tunnel preparation are both effective procedures to treat mandibular posterior furcation involvement, if adequate treatment of choice is made and patient's cooperation is accompanied. However, tunnel preparation is more preservative procedure in mandibular posterior furcation involvement since root canal treatment and prosthetic restoration are needed additionally, in case of root resection.
성인 기관지천식 환자에서 알레르기 비염에 대한 평가와 비염이 천식에 미치는 영향
김철우 ( Cheol Woo Kim ),이찬우 ( Chan Woo Lee ),허규영 ( Gyu Young Hur ),예영민 ( Young Min Ye ),박해심 ( Hae Sim Park ),( Carina Study Group ) 대한천식알레르기학회 2007 천식 및 알레르기 Vol.27 No.4
Background: Allergic rhinitis (AR) is the most common comorbid condition in bronchial asthma (BA), which is associated with increased morbidity and difficulty in asthma control. Recent guidelines have emphasized an integrated approach in the management of patients with both BA and AR. Objective: This study evaluated the prevalence of AR in patients with BA and evaluated its impact on asthma. Method: Adult patients with BA who visited outpatient clinics of general hospitals and primary clinics for asthma management were enrolled sequentially between October 2005 and March 2006. The prevalence and symptom scores of AR and BA were assessed using an ISAAC questionnaire. The severity of BA and AR was classified according to the GINA and ARIA guidelines, respectively. Result: A total of 460 patients with BA were recruited from two university hospitals (n=109) and 49 primary care units (n=351). The prevalence of AR symptoms was 72.6% (334/460). Although the prevalence was higher in younger patients, AR symptoms were also prevalent in elderly patients (59.1% in patients aged ≥ 65 years). Of the 334 patients with concomitant BA and AR symptoms, 59 (17.7%) were not diagnosed with AR, even though the patients reported AR symptoms. The cure-rate of AR in patients with both BA and AR was 65.3% (218/334). The most common level for AR severity was mild intermittent (38.3%) followed by moderate-severe intermittent (26.6%), mild persistent (24.3%) and moderate-severe persistent (10.8%). The prevalence of AR was not different according to the asthma severity. The patients experienced AR symptoms more frequently in November, followed by October, March and April. The BA patients combined with AR tended to present higher asthma symptom sores and suffered from significantly higher night symptoms than those with BA alone (P<0.05). Conclusion: The prevalence of AR was 73% in adult asthma patients; however, AR has been underdiagnosed and under-managed. AR should be evaluated and managed properly in all asthmatic patients to achieve a better asthma control. (Korean J Asthma Allergy Clin Immunol 2007;27:248-256)
류코트리엔 조절제를 사용중인 기관지천식 환자에서 경구 부신피질 호르몬 감량후 발병한 Churg - Strauss 증후군 1 례
김철우(Cheol Woo Kim),홍천수(Chein Soo Hong),배상운(Sang Woon Bae),조재희(Jae Hee Cho),김현진(Hyun Jin Kim),문재연(Jae Youn Moon),장승민(Seung Min Jang),김형종(Hyung Jong Kim),선우일남(Il Nam Sunwoo),조상호(Sang Ho Cho) 대한천식알레르기학회 2002 천식 및 알레르기 Vol.22 No.2
N/A
김철우 ( Cheol-woo Kim ),장주욱 ( Ju-wook Jang ) 한국정보처리학회 2004 한국정보처리학회 학술대회논문집 Vol.11 No.1
자동차를 기반으로 한 애드혹 환경에서는 자동차의 움직임 패턴 특성을 고려하여 모빌리티 모델을 구축하여 시물레이션을 해야 한다. 일반적으로 사용되는 랜덤 웨이포인트 모빌리티 모델[7] 및 그룹 모빌리티 모델[2]은 자동차 특성의 움직임 패턴을 보여주지 못한다. 또한 Freeway 모빌리티 모델 및 맨하탄 모빌리티 모델[4]도 애드혹 망에 대한 전체적인 성능평가를 분석하기 용이하지만 자동차 그룹의 움직임 및 그룹내에서의 성능 평가를 분석하기에는 적합하지 않다. 본 논문에서는 Freeway 모빌리티 모델을 이용하여 그룹의 이동 시나리오를 제시하고 그룹내에서의 통신시 고려되어야할 점 즉, 컨트롤 오버헤드 및 라우팅 경로의 발견등에 관하여 옵넷 시물레이터를 이용하여 분석하였다.