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具德吉 서울교육대학교 과학교육연구소 1984 科學과 數學敎育 論文集 Vol.10 No.-
This article reviewes the experimental evidence for the structure of the and discusses its relevance to the shell model. Empirical evidence have shown that at both proton and neutron number, 2,8,20,28,50,82,and 126, all the nuclei have demonstrated characteristic discontinuities. Also theoretical explanation for the magic numbers has been examined, By introducing strong spin-orbit interaction all the magic number are well matched the total numbers of nucleons in closed shells.
후지(厚地) 면직물의 특성에 관한 연구(Ⅰ) : Frazier법에 의한 통기도
변희윤,김덕리,구자길,황백순 부산대학교 1999 生産技術硏究所論文集 Vol.56 No.-
This paper describes the properties and air permeability of heavy cotton fabrics. The physical properties (air permeability and water vapor transmission in fiber assembly) have considerable effects on hygiene and comfort. The studies on air permeability and water vapor transmission were carried out using many types of apparatus. In this study, air permeability, open free area, relative open free area, pore diameter, and water vapor transmission were obtained by computerized Frazier Method. Air permeability of heavy cotton fabrics has correlation with open free area and relative open free area, respectively (r=0.9 over). By controlling the fabric count and yarn diameter, we could predict air permeability. As the ratio of open free area, relative open free area, and air permeability were increased, the value of water vapor transmission resistance was decreased. 본 연구는 후지 면직물의 특성에 관한 첫 번째 연구로 후지 면직물의 통기도에 관해서 조사하였다. 섬유집합체의 통기성과 투습성은 위생성능면과 쾌적성 평가면에서 매우 중요한 인자중의 하나이다. 따라서 섬유집합체의 통기성과 투습성에 관한 연구는 오래 전부터 행해졌으며 여러 가지형의 시험기도 개발되어 왔다. 그중 본 연구에서는 Frazier법으로 측정하여 통기성과 평면기공률, 상대평면기공률, Pore diameter 및 투습저항과의 관계를 조사해본 결과 면 후지직물의 통기성은 평면기공률, 상대평면기공률과 각각 정상관의 관계이고(r=0.9이상), 직물의 밀도와 실의 지름을 제어함으로써 통기성을 예측할 수 있었고 직물의 평면기공률, 상대평면기공률, 공기투과도가 크면 투습저항이 적어졌다.
박상호,온영근,김현정,이태훈,길효욱,김현건,박수진,송해정,한대희,방덕원,신원용,이내희,김성구,권영주 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1
Background : Microvascular angina or syndrom X is heterogenous and encompasses different pathogenetic entities. Several studies suggest that microvascular angina have good prognosis and occurs predominantly in postmenopausal women. Lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and fibrinogen are the independent risk factor of acute coronary syndrome and are the chief underlying cause of atherosclerosis. We investigated clinical characteristics and markers in patients with microvascular angina. Methods : We studies 23 patients diagnosed with microvascular angina and 16 control group with negative treadmill exercise test and no significant coronary angiogram. We investigated clinical characteristics in patients group and evaluated symptom during a follow-up period of 4.2± 2.5 month. Exercise time in treadmill exercise test was compared between patients and control group. We assessed the level of markers, such as lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and ESR in two groups. Results : There is no difference in age between two groups. Patients group had a tendency to increase in female, hypertension, DM, and smoking history, but there was no statistical significance difference. Exercise duration time was significantly decreased in patients with microvascular angina (p<0,05). Serum lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholestrol, Triglyceride, ESR, Fibrinogen and Homocystein value were no significant difference between microvascular angina and control group. Only CRP was significantly high in patients with microvascular angina (p<0.05). Conclusion : There was no statistical significance difference in age, sex, hypertension, DM and smoking history between two groups but patients group had a tendency to increase the prevalence in hypertension, DM and smoking history, female. Also, Symptom improvement and disappearance in follow-up was presented in 11 patients of 19(57.9%). Exercise tolerance was worse in patients group than control group. CRP value was significantly higher in patients group than control group. There was no statistical significance difference in lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, ESR and Fibrinogen between two groups.
具德吉,金成度 서울교육대학교 과학교육연구소 1991 科學과 數學敎育 論文集 Vol.17 No.-
Johnson과 Siciliano의 광학적 모델에서 유도되어진 이론으로 부터 70 Mev에서 190 Mev까지의 에너지 영역에 걸쳐 ^13C에 관한 파이온 단일전하교환반응의 0˚미분산란 단면적을 계산하였다. 계산되어진 결과는 자유로운 파이온-핵자 전하교환 산란단면적및 여러가지 이론적 결과와 더불어 실험결과와 비교되어졌다. The zero-degree differential cross sections of pion single charge exchange on ^13C in the energy region from 70Mev to 190Mev are calculated utilizing a modified theory which was derived from the optical model of Johnson and Siciliano. The cross sections increase monotonically from 0.18mb/sr at 70Mev to 1.40mb/sr at 190Mev. Comparisons with theoretical calculations, with the free πN charge exchange cross sections, and with the experimental data are presented.