體育特技者의 肺機能과 運動後 恢復期의 血液가스의 變化

崔圭澤,朴載植,黃樹寬,朱永恩 慶北大學校 1985 論文集 Vol.39 No.-

The pulmonary function and changes of blood gas tensions and pH in the athletes have been reported but are fragmentary as to require more complete studies including all the pulmonary parameters and blood gas tensions especially at the early part of 20 years of age. This study was aimed to elucidate the pulmonary function at the rest and the changes of venous blood gas tension and pH after the exercise in the athletes of physical education students. The subjects chosen for this study were 15 athletes of physical education students (special group) of 21-25 years of age. The athletes had at least four years of exercise careers, and were compared with 12 non-athletes of physical education students (general group) who had not been subjected to any form of rigorous training program. All the subject were directed to perform running on the treadmill for three minutes under the condition of 15% grade and 5 MPH. The venous blood samples were taken at the rest as well as at 0, 5, 10 and 20 minutes after the exercise to check the changes of Pco_2, Po_2 and pH during the recovery period. The venous blood Pco_2, Po_2 and pH were determined using the Model 175 Automatic Blood Gas Analyzer by Corning Co., and the pulmonary function using the computerized spirometer. The results obtained were compared with the general group and summarized as follows: The special group exhibited higher values of the pulmonary function except FVC compared with the general group, and particularly FEV_0·5% and FEV_1% were significantly different. The venous Po_2 was decreased immediately after the exercise, but increased during the recovery period. The special group generally showed higher oxygen partial pressure than the general group. The venous Pco_2 in contrast to the oxygen increased immediately after the exercise, but decreased during the recovery period. The special group showed lower carbon dioxide partial pressure. Blood pH was significantly decreased from the resting value after the exercise and returned to the resting value at 20 minutes. In the special group, however, the change of pH was less than in the general group.

혼합치열기 반대교합자에서 상악골 전방견인장치를 이용한 치료증례

최형준,이제호,최병재,김은영 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.3

The prevalence of class Ⅲ malocclusion is approximately 5∼9%, and about one fourth of this malocclusion is due to underdeveloped maxilla. Maxillary protraction appliance is an orthopedic device which promote the growth of a deficient maxilla by applying extraoral force to actively growing patients. The object of using maxillary protraction appliance is to guide a normal growth of maxilla and mandible and improve the occlusal relationship and also improve the facial profile. The author treated three patients whom were diagnosed as a class Ⅲ malocclusion due to deficient maxilla using maxillary protraction appliance and the followings are the conclusions : 1. In these cases, anterior crossbite was corrected by anterior movement of maxilla and downward backward rotation of mandible and simultaneously, anterior facial height was increased. 2. The amount of dental change compare to skeletal change was greater as the patients got older. 3. When 500gm of force to each side was applied, the treatment period has been decreased. 4. As a result of applying the force between maxillary first primary molar and canine, there was a small degree of changes in palatal plane. So, it can be concluded that the maxillary protraction appliance is effective in treating growing patients with a deficient maxilla.

선형유도전자펌프내의 자기유체 유동에 관한 수치적 연구

최훈기,유근종,박태봉,은재정,장남영 국립7개대학공동논문집간행위원회 2003 공업기술연구 Vol.3 No.-

Numerical analysis is performed for magnetic and MHD flow fields in Electro-Magnetic(EM) pump. A finite volume method is applied to solve magnetic field governing equations and the Navier-Stokes equations. Vector and scalar potential methods are adopted to obtain the electric and magnetic fields and the resulting Lorentz force in solving Maxwell equations. The magnetic field and velocity distributions are found to be influenced by the magnitude of the Reynolds number and the phase of applied electric current. Computational results indicate that the magnetic flux distribution with changing phase of electric current is characterized by a pair of counter-rotating closed loops. The velocity distribution of the flow field is influenced on the intensity of Lorentz force.

LPE법으로 작성한 Bi₂Sr₂Ca_(1-x)Nd_(x)Cu₂O_(8+δ) 막(film)의 초전도특성 및 터널링 분광

최은영,신재수 대전대학교 기초과학연구소 2003 自然科學 Vol.14 No.1

LPE(Liquid Phase Epitaxial)법을 이용 Bi_2Sr_2Ca_(1-χ)ND_χCu_2O_8+ε 막(film)을 작성하여 초전도특성을 알아보았고, Break junction법을 이용 터널링 분광 측정을 통하여 에너지 간격(gap) 2△의 변화를 조사하였다. 융액(melt)속 Nd 조성비 (χ_(L))의 증가에 따라, 임계온도 Tc^on과 격자상수 c 등은 감소를 보였으며, Cu2p의 main peak가 낮은 결합에너지쪽으로 shift하였다. 이러한 변화들은 Nd의 치환에 따른 Cu-O면의 hole이 감소함에 의한 영향이라 생각된다. 또한, Nd 조성비(χ_(L))의 증가에 따라 에너지 간격(gap) 2△과 2△/kbTc^2ero의 값은 증가를 보였다. Tunneling Spectroscopy measurements were performed on the Nd substituted Bi_2Sr_2CaCu_2O_8+δ system prepared by liquid phase epitaxial method. The lattice constant c and onset critical temperature Tc^on decreased with increase of χ_(L) almost the same as in sintered samples. Negative chemical shifts of the Cu 2p main peaks were obtained. These behaviors indicate that the holes at both the Cu and O sife decrease with increasing Nd concentration. The energy gap 2Δ and 2Δ/k_BTc^on increased with increase of χ_(L).

칫솔질 교육의 치면 세균막 억제 효과

유은규,손미연,최성철,김광철,박용덕,박재홍 大韓小兒齒科學會 2012 大韓小兒齒科學會誌 Vol.39 No.1

To maintain good oral hygiene, plaque control is essential and the most common and effective method is appropriate brushing. However accurate brushing is so difficult for children that the importance of brush is getting higher. We investigated the effect of tooth brushing instruction in plaque control for 40 children who came to Kyunghee university dental hospital, department of pediatric dentistry. We examined basic information by self-assessment, evaluated plaque index, tooth & tongue cleanness, malodor index for 4 times and compared values before and after tooth brushing instruction. Plaque index decreased(p<0.01) and tooth & tongue cleanness increased(p<0.01). There were no significant differences in mal-odor index. In conclusion, tooth brushing instruction is effective in removing dental plaque and its beneficial role is highly expected in establishing children’s good oral hygiene. 좋은 구강 위생 환경을 유지하기 위하여 치태 조절은 필수적이며, 가장 보편적이고 효과적인 방법은 올바른 칫솔질이다. 그러나 아동들은 올바른 칫솔질을 시행하기 어려워 칫솔질 교육의 중요성도 높아지고 있어, 경희대학교 치과대학 소아치과에 내원한 아동 40명을 대상으로 칫솔질 교육의 치태 조절의 효과를 조사하였다. 설문조사를 통해 기본 정보를 조사하고 치면 세균막 지수와 치아 및 혀 세정도, 구취 관리도를 측정하는 조사를 총 4회에 걸쳐 시행하여 칫솔질 교육 전과 후의 차이를 비교하였다. 치면 세균막 지수는 감소하였고(p<0.01), 치아 및 혀 세정도는 증가하였다(p<0.01). 구취관리도는 상관성을 보이지 않았 다(p>0.01). 이러한 결과 칫솔질 교육은 구강 내 치면 세균막 제거에 뛰어난 효과를 보여, 아동들의 좋은 구강 위생 환경의 확립에 도움 을 줄 것으로 기대된다.

시비량이 생강의 생육 및 수량에 미치는 영향

최재을,김정선,이은정,이완재 충남대학교 농업과학연구소 1998 농업과학연구 Vol.25 No.2

This experiment was carried out to define the effects of application amounts of the chemical fertilizers on plant growth and yield of the ginger. The results obtained are summarized as follows. Plant height of the ginger was 45.3 cm at lower level of fertilizer, 52.6 cm at recommended level, and 49.4 cm at higher level. Leaf area, stem number, and stem diameter were more significantly increased at higher level of fertilization compared to recommended rate. Dry weight of shoots and rhizomes were significantly increased with the increase of fertilization level. Stem number, stem diameter, leaf area, dry weight of shoots, and fresh weight of rhizomes were positively correlated with the amounts of fertilizer applied. Yield of rhizomes were 1, 653 kg at lower level of fertilizer, 2,248 kg at recommended level and 2,428 kg at higher level, respectively. Ginger yield showed 7.4% higher at higher level of fertilization compared to recommended rate.

종강의 크기가 생강의 생육 및 수량에 미치는 영향

최재을,김정선,이은정 충남대학교 농업과학연구소 1998 농업과학연구 Vol.25 No.1

This study was investigated to find out the optimum rhizome size of ginger characteristics and yield at two planting densities. Seventy five gram of rhizome gave best performance for plant height and yield with comparison with the other sizes at two planting densities. Among 25g, 50g and 75g of ginger rhizome size were not significantly different in plant height and yield at 30×30cm planting density. But, 25g of rhizome size is economically recommended at 30×30cm planting densities.

다발성 간종괴의 형태로 나타난 특발성 과호산구 증후군 치험1예

최승오,연규민,이승민,김순제,왕준호,박형석,이재동,진춘조,이창훈,신현준,김정은 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-

Hypereosinophilic syndrome is characterized by persistent blood eosinophilia of 1,500/ul or more in the absence of known causes and multiorgan dysfunction by eosinophil-related tissue damage. In Korea, some cases of hypereosinophilic syndrome with hepatic involvement have been described with prolonged benign clinical courses. Most of them were diffuse or multifocal lesions in imaging studies, and a few case presenting as a single mass has been described. Here we report a case of hypereosinophilic syndrome with hepatic involvement in a 65-year-old man who presented with multifocal mass lesions. By abdominal US and CT scan, multiple, ill-defined nodules were detected in throughout the liver. Liver biopsy revealed severe eosinophilic hepatitis, suggestive of hypereosinophilic syndrome. Hepatic mass lesions improved after steroid administration for several weeks.

UV 센서를 위한 Spiroxazine LB 단분자막 특성에 대한 연구

최성욱,박은진,장지훈,김재호,강신원 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

租稅에 의한 所得再分配效果의 有效性

崔壬煥,李載殷 成均館大學校 韓國産業硏究所 1981 韓國經濟 Vol.9 No.-