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Bi와 Te 합금결정의 순도 변화에 대한 전기적 특성과 냉각효과에 관한 연구 (제1보)
류영래 광주보건대학 1981 論文集 Vol.6 No.-
To obtain the cooling elemental devices of good quality, author changed mass and purity of Bi and Te, and made Alloy Crystal, and exmined the electric characteristic, and obtained the results as follows. 1. The higher purity of Bi and Te were, the larger thermoelectromotive-power, and the smaller specific resistance, and electric property of crystal growth direction was equal. 2. When the mass ratio of Bi and Te is two to three, it is the most desirous in raising the cooling efficiency.
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全南 一部 農漁村 地域의 胸部X線 檢査에 관한 調査硏究
柳永來 광주보건대학 1982 論文集 Vol.7 No.-
The 16,695 patients were undergone the chest X-ray examination from Jan to Dec in 1980 in two general hospitals nearby a farming and fishing villages in chunnam, and auther investigated and analyzed these results, then, the following results were obtained. 1. It was shown that the highest case was in chest examination(81.36 %) and in sequence, Extremitces(6.4%), simple abdomen(5.78%), skull(2.65%). 2. According to the seasonal variations of the patients in this paper, they were the highest from Feb. (9.04%) to Mat. (10.01%) and relatively the lowest from Sep.(7.21%) to Oct.(7.10%). 3. In sex distinctions, male outnumbered female at the rate of 2.1:1, and according to the age brackets, it was the greatest in the thirties, and was rapidly decreased in the sixties and above. 4. According to the radiographical projection for chest, (P-A) projection was the greatest(78.13%), and secondly, (A- P) projection(12.36%). 5. According to the findings about X-ray examination, it was 52.8% in normality and 47.2% in abnormality. 6. Among the chest films of 16,695 patients, 24.75%of them were Poor-conditioned or rechecked, and unsuitable exposure was the greatest cause.
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안경광학과 교육 연장(3년제) 계획의 타당성에 관한 조사 연구
류영래,김상문,심문식 광주보건대학 1995 論文集 Vol.20 No.-
The purpose of this study is to offer previous data for training of the better opticians and insuring substantiality of the education in junior college. The research groups consist of the professor of ophthalmic optics, spectacles wearers, opticians, graduates and students. The research nations are U.S.A in the North America, Germany in the Europe, Japan and Philippines in the Asia and Australia. The results are as follows, 1. The related educational systems to spectacles are generally the four years system. And the dispensing and optometry are divided in function. 2. The social recognitions change for opticians due to increase wearere and they require the opticians to study harder. 3. The relative respondents to education give support the extension of the education term. 4. The opticians demand that technical education are afforded to them. Because new materials are in the development stage and the spectacles wearers claim new information from opticians.
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HAp전구체용액의 감압침투법에 의한 Hydroxyapatite 소결체의 미세구조 제어
류영래,임용무 광주보건대학 1998 論文集 Vol.23 No.-
In order to make high density of hydroxyapatite, an infiltration processing was adopted. The HAp precursor solution derived by sol-gel processing was infiltrated into the pre-heated specimen. And the density and the microstructure were experimentally analyzed in accordance with the pre-heating temperature and the infiltration times. The precipitation of the HAp precursor was crystallized in the surface of grains forming open pores through dry and heat treatment. Those showed a pillar shape and an uniaxial crystal growth, wherein remained in a micro-crystal group, after sintering at 1250℃ for 3h. The density of the sintered HAp having no infiltration was 94.3% corresponding to the theoretical density. However, the density thereof was increased from 96.6% for the first infiltration to 96.8% for the third infiltration and was decreased for the more infiltration times. Futhermore, in case of the four times, the average radius and the total volume of the pores of sample pre-heated in 1100℃ were reduced in 1.233Å and 3.26×10^(-3)cc/g, respectively, thereby making it possible to produce the densified hydroxyapatite, relative density 96.8%, by the control of the microstructure, e.g., the removal of the pore and the reduction of the pore volume.
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양길순,류영래,한재진,함희석 광주보건대학 1981 論文集 Vol.6 No.-
To know the effect of tube voltage in X-Ray Radiography. We made an experimental study on the tube voltage, on the exposure dose in taking general examination, and obtained the results as follows. A) In the Radiographic of the Chest P-A; The experimental value of tube voltage was obtained under the control of the applied voltage, the kind of some apparatus and thickness of body. 1) The average chest Radiographic condition was resulted as 65.5Kv, 16.6 mAs in Hospital around the chonnam area 2) It was resulted 21.93cm in average Thickness of the chest, exposure dose 20mR B) The thickness was 19.22cm in the abdomen and then appeared average tube voltage was 71.6Kv, 68.2 mAs C) Estimation could not in difference with because of the working dark room uniformly to hand-operated and automatic process.
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