• 한국동굴학회:학술대회논문집
• /
• 한국동굴학회 1994년도 제 6차 국제학술회 ASIA 동굴 SIMPOSIUM
• /
• pp.108-109
• /
• 1994

Cheju island is situated at about 90km south of southern most tip of the Korean peninsula. Its shape is an ellips with size of 80$\times$$40km^2$, and it is characterized by a symmetrical form whose peak is Mt. Halla (1950m). Major chemical composition of the rock samples from Manjang gul cave is determined by XRF using the fundamental parameter method consisting of fully auto quantitative analysis, semi quantitative analysis (order estimation) and group quantitative analysis. Judging from chemical composition ($SiO_2=53.07Wt% Fe_2O_3=11.34Wt%, MgO=6.48Wt%, Na_2O=3.07Wt%, K_2O=1.05Wt%$), this rocks may belong to non alkalic basalt. K-Ar ages of two rocks samples from the Manjang gul cave are also determined. The discrepancy of K-Ar ages is found. They are 0.03Ma and 0.42Ma, respectively. This paper describes some problems experienced in dating young volcanic rocks and then discusses chemical composition, X-ray fluorescence analysis and the age of the formation of a lava tunnel such as Manjang gul cave in cheju Island.

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 1995년도 추계학술발표회논문집(1)
• /
• pp.41-47
• /
• 1995

A parametric study bas been performed for the various refueling schemes of CANDU 6 reactor loaded with reference DUPIC fuel. The optimum discharge burnup was determined such that the peak bundle power is minimized for the equilibrium core. Based on the results of instantaneous core calculation using patterned random age distributions, it was decided to perform the refueling simulations only for 2-bundle and 4-bundle shift refueling schemes. The 600 FPD simulation has shown that the operational margins of the channel and bundle power to the license limits are 7.9% and 17.1%, respectively, for 2-bundle shift refueling scheme. The 4-bundle shift refueling scheme also satisfies the license limits and the operational margins of the channel and bundle power are 7.1% and 9.8%, respectively. The result of refueling simulation indicate the possibility of using reference DUPIC fuel in current CANDU 6 reactor.

• Journal of Chest Surgery
• /
• 제27권4호
• /
• pp.287-291
• /
• 1994

Spontaneous pneumothorax is an accumulation of air in the pleural space with collapse of the lungs in the absence of external chest trauma. In this clinical study were analyzed of 369 cases of spontaneous pneumothorax experienced at the department of Thoracic and Cardiovascular Surgery, College of Medicine, Chosun University during from January, 1986 to December, 1992.The peak incidence of age was in 3rd decade and more predominantly in male than women [5:1]. Pulmonary tuberculosis was most common etiologic condition and frequently symptoms were dyspnea and chest pain. The site of pneumothorax was Rt.in 48%, Lt.in 45% and both in 7%. The common accompanied diseases were hydrothorax, pyothorax and hemothorax. In 166 cases [45%] were treated by closed thoracostomy only, in 43 cases [12%] were treated by closed thoracostomy & chemical pleurodesis with Tetracycline and in 145 cases [39%] were treated by open thoracotomy. The most serious complication, one case of pulmonary edema, was developed after closed thoracostomy and fatal.

• 대한한의학회지
• /
• 제15권2호
• /
• pp.125-131
• /
• 1994

The clinical study was done in 50 patients with acne who had been treated with acupuncture and herb-medicine. The results were as follows. There were 9 males and 41 females in sex. The peak age at onset was 21 - 30 years old(28 cases. 56%). The most commen chief complaint was itching(70%). As for digestion. 24 cases(48%) is poor and defecation disorder appeared 25cases 50%). difficult menstruation 20 cases (48.78%). Bohyulansintang(補血安神湯) was most use in treatments as 26.38%.As for treatment period. 25 cases(50%) were treated from 1 week to 3 weeks.

• 한국독성학회:학술대회논문집
• /
• 한국독성학회 2001년도 International Symposium on Dietary and Medicinal Antimutgens and Anticarcinogens
• /
• pp.203-204
• /
• 2001

Background and Aim: Transitional cell carcinoma (TCC) of the bladder represents the fifth most prevalent malignancy in Western population, with peak incidence found in males of the 50- to 70-year-old age group. A major problem in the management of bladder cancer is the low sensitivity of a large proportion (approximately 40%) among bladder tumors to chemotherapy and the high risk for recurrence of bladder tumors after transurethral resection.(omitted)

• Journal of Chest Surgery
• /
• 제8권1호
• /
• pp.45-50
• /
• 1975

Eleven cases of traumatic diaphragmatic hernia treated at the department of thoracic and cardiovascular surgery, for the period of seven years up to February 1975, from the base of this report. 1. Peak incidence was found in the age group of one to four years and thirty to forty years, four cases in each group respectively, occupying 63.6% of all cases. 2. In all the lesions the left diaphragm was affected and the herniated organs were in order of frequency the small bowel, the large intestine, the stomach, and the spleen. 3. The methods of the adapted treatment were laparatomy in five, thoracoabdominal approach in four, and thoracotomy in two cases. 4. The mortality rate was low, only one out of eleven died It seems that the immediate appropriate treatment can bring forth the excellent outcome.

• 한국건축시공학회지
• /
• 제13권1호
• /
• pp.20-28
• /
• 2013

Flexure toughness of Steel Fiber Reinforced Concrete (SFRC) shows a time-dependent characteristic due to the hydration process of the cement matrix in the SFRC system. The effect of two important factors, water/cement (w/c) ratio and fiber volume fraction, on the flexure toughness development of SFRC were investigated. Three different SFRC mixtures with hooked-end steel fibers were tested using a four-point bending testing configuration. Each mixture was tested at five different ages. The results showed that the post-peak toughness of SFRC developed at an earlier age than the first-crack toughness.

• 음성과학
• /
• 제8권4호
• /
• pp.131-138
• /
• 2001

Sound pressure level, subglottic air pressure, vital capacity, adduction/abduction rate, and phonatory efficiency were measured in 19 opera singers, 17 Korean traditional 'Pansori' singers, and 20 non-singers; subjects' mean age was 25.9(SD=7.2) and the singers had been singing professionally for 5-10 years. One-way ANOVA and Scheff$\w'{e}$ post-hoc analysis were used to analyze aerodynamic data and to identify significant differences among groups. Sound pressure level, peak subglottic air pressure, and phonatory efficiency were found to be significantly different among three groups of the subjects. Differences in aerodynamic properties were discussed for their significance in diagnosis and treatment of voice disorders in professional singers.

• 동굴
• /
• 제20권21호
• /
• pp.34-43
• /
• 1989

Cheju island is situated at about 60km south of southern most tip of the Korean peninsula. Its shape is an ellips with size of 80*40$\textrm{km}^2$, and it is characterized by a symmetrical form whose peak is Mt. Halla(1950m). Major chemical composition of the rock samples from Manjang gul cave is determined by XRF using the fundamental parameter method consisting of fully auto quantitative analysis, semi quantitative analysis (order estimation) and group quantitative analysis. Judging from chemical composition (SiO$_2$ = 53.07Wt％, Fe$_2$O$_3$ = 11.34Wt％, MgO=6.48Wt％, Na$_2$O=3.07Wt％, $K_2$O=1.05Wt％), this rocks from the Manjang gul cave are also determined. The discrepancy of K-Ar ages is found. They are 0.03 Ma and 0.42Ma, respectively. This paper describes some problems experienced in dating young volcanic rocks and then discusses chemical composition, X-ray fluorescence analysis and the age of the formation of a lava tunnel such as Manjang gul cave in cheju Island.

• 국제물리치료학회지
• /
• 제8권2호
• /
• pp.1158-1162
• /
• 2017

The purpose of the study was to investigate the strength of sokinetic muscle by the position of a volleyball players. Analysis and comparison of shoulder dynamic stability will be conducted according to rotational movement of the shoulder during spiking and serving amongst the various positions. Fifty professional Korean female volleyball players (age: 20~30), all different positions - attacker (left and right), center, setter, and libero were The concentric peak torque, strength ration of the internal and external rotation of the shoulder girdle for both dominant and non-dominant arms. Firstly, there were significant differences found for the strength ratio between the setter and the other positions in the dominant arm. On a second note, there was a significant decrease in shoulder dynamic stabilization for both the attacker and center in the dominant arm. However, there were no significant differences for the setter or the libero. This study suggests that the isokinetic muscle strengths of the volleyball players are different from each other.