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번정득,권영주,박상호,한대희,이상철,강진환,김명구,심규혁,최병조,온영근,현민수,김성구 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2
Background : Atherosclerosis is the chief underlying cause of ischemic heart disease and there is increasing evidence that inflammation is an important determinant of the development of atherosclerosis. We assessed the levels of inflammatory markers in patients with ischemic heart disease and normal group who has normal coronary angiograms. Materials and Methods : Coronary angiography was performed in 142 patients. 107 patients of ischemic heart disease(stable angina pectoris 58, unstable angina pectoris 30, Acute myocardial infarction 19) and 38 normal control subjects. We assessed the level of inflammatory markers, such as CRP, ESR, fibrinogen and leukocyte. Results : CRP, ESR and fibrinogen values of the patients with stable angina pectoris and unstable angina pectoris were higher than that of normal control group, but there were no statistical significance. Leukocyte value of the patients with unstable angina pectoris(9003.3±701.5/mm^(3)) was significantly higher than that of the patients with stable angina pectoris(6685.5±245.8/mm^(3)) and normal control subjects(6394.3±235.1/mm^(3)). CRP, ESR and fibrinogen values of the patients with acute myocardial infarction were also higher than that of normal control subjects. CRP was 3.88±2.05 mg/dL in acute mocardial infarction group, and 0.29±0.15 mg/dL in normal control subject group(p<0.05). Fibrinogen was 541.6±45.1 mg/dL in acute myocardial infarction group, 321.4±25.6 mg/dL in normal control subject group(p<0.05). Leukocyte was 10942.1±737.6/mm^(3) in acute myocardial infarction group, 6394.3±235.1/mm^(3) in normal control subject group(p<0.05). Conclusions : This study demonstrate that CRP, fibrinogen and leukocyte values of acute myocardial infarction group were significantly higher than that of control group and stable, unstable argina pectoris group. Leucokyte values were significantly elevated in unstable angina group, but CRP values were not in unstable angina group.
Representation of bounded Linear Operators on Reproducing Kernel Hilbert Space
변두원,이성희,박달원,노영순,김승동 공주대학교 과학교육연구소 2001 과학교육연구 Vol.32 No.1
재생핵 힐버트공간에서 유계인 작용소는 어떤 적분변환의 형태로 표시된다. 또한 재생핵을 이용하여 어떤 적분변환의 형태가 유계인 작용소이기 위한 필요충분조건을 구한다. The bounded linear operators on a reproducing kernel Hilbert space can be represented in the form of generalized integral transform. Also, they are completely characterized by integral kernels.
이식형 제세동기를 위한 Flyback Converter의 출력보상
卞咭浩,劉永善,李祥準,李鐘雨,金正國,許雄 명지대학교 산업기술연구소 2005 産業技術硏究所論文集 Vol.24 No.-
On the occasion of sudden cardiac fibrillation, it is critical to use the defibrillator which delivers electrical energy across the patient's chest, in short time. Since the capacitor and battery inside 1CD(implantable cardioverter/defibrillator) degrade according to the increase of usage and time, the charging time of capacitor becomes prolonged, in order to compensate the prolonged charging time, we propose an algorithm which controls the charging time by changing frequency and duty cycle of feeding pulses to the input of flyback converter.
유기화합물과 불균일 혼합물 처리를 위한 인공화학실험실의 확장
변영태,조성태 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.1
Experiments in a laboratory are very important in science education for primary, middle, and high school students. However, education systems in many countries do not provide enough experiment chances to students for several reasons. One of most important reasons is hat financial support from a government is not sufficient. Besides that, insufficiency of experimental and managerial facilities for laboratories and equipments, danger of experimental accidents, heavy pressure to get high scores of entrance written exams for a school of higher grade, and other difficulties would make it so. From desirable science education's point of view, there is still a problem in countries where students have reasonable experimental chances. The problem is that every student does not participate equally in experiments and they do only predetermined experiments during class hours. Nobody can do any experiment, which is not predetermined,whenever they want. As an alternative to solve the problem, we developed ACL (Artificial Chemistry Laboratory) to make students do on personal computers any experiment whenever they want. However, the previous ACL system has limitations, since it covers only pure substances and homogeneous mixtures. ACL-V is an extended version of the previous ACL system in order to cover organic (carbonic) compounds and heterogeneous mixtures. To include heterogeneous mixtures, we extend the knowledge base, the spatial description lanaguage, the existence shape description langauge, and related processes. ACL-V handles solid, liquid, and gas heterogeenous mixtures. To include organic (carbonic) compounds, we extend the knowledge base and the process libraray. The hierarchy of the knowledge base is made based on the commonly accepted grouping knowledge of chemistry. The first subclass of the Carbonic class is the Aliphatic class for aliphatic carbonic material. It is further divided into three subclasses. The Aromatic class is for aromatic carbonic material and divided into several subclasses, and the HighMolecu