口腔保健敎育의 重要性과 活性化方案

金鍾培 韓國保健敎育學會 1987 보건교육건강증진학회지 Vol.4 No.1

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木炭의 水蒸氣賦活法에 依한 粉末活性炭의 製造에 關한 硏究 : 原料木炭과 賦活條件이 粉末活性炭의 性能에 미치는 影響

鄭鍾九 동국대학교 농림과학연구소 1971 農林科學 論文集 Vol.4 No.-

The results of the experiment are summarized as follows: 1. The activation of charcoal varies according to its kind. The soft charcoal of small apparent specific gravity is great in reaction and readily activated as compared with the hard charcoal of large apparent specific gravity. The charcoal of Pinus is suitable to be used as the raw material of activated carbon, while the charcoals of Betula, Castanea and Quercus are considered unsuitable. The apparent specific gravity of charcoal increases as the carbonization temperature rise. This indicates, therefore, that the pine charcoal carbonized at low temperature is the most suitable raw material of activated carbon. In addition, as the activated carbon made by the soft charcoal is multihole type and cooled down rapidly even in the air, it is rarely reduced to ashes. 2. The yielding ratio increases as the hours of activation are shortened. However the yielding ratio may not be considered prerequisite, because the activity is the most important factor of the activated carbon. 3. The effect of decolorization is great in case of small yielding ratio. 4. In the relationship between the activation temperature and activity (decolorization), the higher temperature is strong in decolorization within the scope of the present experiment. 5. The longer hours of activation are great in the activity. 6. It was expected that the activation would be enhanced by expanding rapidly the internal moisture with the pretreatment of boiling charcoal grains and water in order that the grain may contain as much water as possible. However, the result of the experiment revealed futility of such expectation. 7. There was observed no effect on the quality however much vapour was added within the limit of minimum amount required for the activation. The air did not affect the quality of the activated carbon, while the yielding ratio decreased together with an increased amount. 8. In the activation experiment of fixed layer with the scale as performed, the activated carbon of 8-50 meshes brought about the best results. However, it will vary in case of scale up. 9. Chloro-picrin is effective for activation. The heat is dissolved at the activation temperature, and it contributes to reaction as Cl gas. Both the yielding ratio and caramel decolorization are enhanced, ash content decreases slightly and PH is nearly neutrality.

勤勞所得稅의 稅率構造와 公平問題

徐廷煥 단국대학교 대학원 1988 學術論叢 Vol.12 No.-

It is difficult to assert what level of the progressive degree is most suitable in earned income tax, since it is concerned with philosophical and social problem, that is, equity problem. But, in this paper, we will compare the traditional sacrifice principle with the recent research consequences, and study the simple model, though it is limited, which can determine optimal progressive degree of the tax. There are some restrictions in this paper. First, only earned income is considered. Second, only income taxation is discussed, and consumption tax, wealth tax, and corporation income tax, etc. are excluded in our discussion. Third, the correlations of other taxes are disregarded. In the case of arguing this problems about progressive degree, we will start with "Equal sacrifice theory." These equal sacrifice theories are inducted by Bentham's utilitarianism, and then completed by A.C. pigou. That is, according to equal marginal sacrifice theory, equity is attained when after-income-tax is equal. But nowadays many scholars are criticizing these theories. J.A. Mirrlees proposes the alternatives to the problem that equal sacrifice theory disregards the effect declining in individual volition for labor. But the did not pay attention to the point that the effect is different according as how the specific function type, representing preference in a given income and leisure, is chosen. Unlike Mirrlees' paper, in Fairs paper, optimal income tax rate is expressed by quantities. And its depends on the distribution of abilities. And so marginal tax rate in Fairs paper is higher than that of Mirrlees. Both scholars accomplishment indicates that the structure of progressive tax rate is lower than that of minimum sacrifice theory's in the light of efficiency. But if the structure of linear tax rate, Pareto distrilution of ability distribution and income are determined by ability and education term (level), then the model can be much simplized. According to this model, the person above average ability comes to choose lump-sum tax and income subsidy. In other hand, utilitarianism which underlies in Mirrlees', and minimum sacrifice theory are rejected, and new equity criterion is introduced to optimal tax rate problem. That is, there are two alternatives, one is Rawls' type criterion that pursues the paupers' welfare maximization, and the other is consideration of degree of income inequality. In the first place, optimal tax rate by maxi-min principle is much higher than that of Mirrlees' case, but it is difficult to compare with them directly because of the effect for the labor of wealthier people. The degree of income inequality by Gini coefficient, which raises some problems, by assuming Atkinsons' social welfare function of general utility school, we can consider degree of income inequality. In this case, the tax rate become higher than that of maxi-min criterion. As mentioned above, we discussed equity problem of earned income tax, and confirmed that oftimal tax rate become different according to equity criterion. However, it is not easy to assert which tax rate is the best appropriate until the solution on social value judgement is presented. In conclusion, the significant fact is that maxi-min solution has considerably objective attraction, and it is basement on consideration of inequality.

韓國의 輸出擴大와 企業의 海外進出 : In Relation to Export Promotion in Korea

金鍾淳 명지대학교 1976 明大論文集 Vol.9 No.-

현대 독일 서정시의 모티브에 대한 연구

김종태 제주대학교 1990 논문집 Vol.31 No.1

東洋 政治思想 硏究 : 日本의 一儒敎批判論의 考察 Criticism on Cjonfucianism fo Korea and China

琴鍾友 경북대학교 교육대학원 1980 논문집 Vol.12 No.-

At the end of 16th century, after Hideyosi's invasion of Korea in 1592 the Korean culture spread into Japan. Its effect on Japan war very important to Japan. The Japanese had to learn technical knowledge of printing and movable type from Korea and Korean potters who were brought to Japan to be the founders of the most important traditions of pottery making during the following centuries. Above all confucianism or Korean philosophers, for example, Ree Taege and Kang Su-Un(姜睡隱) as well as their books and meterials also spread into Japan. At that time the structure of Japanese Society was different from Korea and China. The Tokugawa political and social system was Samurai and Daimyo system in the gross of Chu Hsi's philosophy in Japan. His philosophy was Japanized. But this Japanized confucianism is apparently distinguished from that of Korea and China. This is the reason of building various schools until the Age of Meiji. In ideaology from the time of Shogunate begun the creation of Ten-No system State. The position of Ten-No was mysterious. There is no such a thought as Ten-No in confucianism of Korea and China. Hence, in Japan the government enforced the subjects to have royalty with virtues of Japanized confucianism. But this virtue of Japanized Confucianism separate from the highest idea of original confucianism. The Scholar, who holds the point of view above, Criticizes confucianism and culture of Korea and China. Tue-Da, who was a scholar in the history of Japanese thought as well as Chinese thought, criticized confucianism of Korea mend china. The aufhor of this paper thinks that Tue-Da's misunderstanding was originated from Japanized Confucianism.

Porcelain Laminate veneer 절연 피복시 설측 연장 길이에 따른 파절강도의 연구

박종한 慶北大學校 齒科大學 1995 慶北齒大論文集 Vol.12 No.2

개교증, 절연부 파절, 변색등 심미적 요인으로 라미네이트를 설측연장시 연장길이에 따른 파절강도를 알아보기위해 발거된 60개의 상악전치의 순면에 3개의 seating form을 형성하고 sheet wax를 사용하여 가로 5mm *세로 5mm*두께 0.9mm의 block을 형성하고, 각 군에 따라 Ⅰ군:0.5mm, Ⅱ군:1mm, Ⅲ군:2mm, Ⅳ군:0mm로 설측 연장 길이를 달리하여 block을 형성 이를 인상채득하여 내화모형을 제작하였다. 여기에 라미네이트용 도재를 2회에 걸쳐 축성통법대로 소성 제작하였다. block에 맞추어 contouring하고, 내화매몰재를 제거 sandblast처리를 시행하였다. 그 후 레진시멘트로 합착하였다. 절치간 각도를 127도로 특별히 제작된 holding device를 이용하여 인스트론 만능시험기에 시편을 거상하고, 분당 0.5mm cross head speed로 파절강도를 측정하여 다음과 같은 결과를 얻었다. .각 군의 평균파절강도는 대조군인 설면으로 연장치 않은 Ⅳ군에서 86.95Mpa,0.5mm연장한 Ⅰ군에서 44.98Mpa,1.0mm연장한 Ⅱ군에서 27.47Mpa,2.0mm연장한 Ⅲ군에서 19.61Mpa의 순으로 나타났다. .모든 실험군 사이에는 통계적으로 유의성있는 차이를 나타냈고(p<0.01), 이러한 실험 결과로 미루어 보아 라미네이트 디자인시, 설면으로 연장치 않거나, 절연부의 피개가 불가피한 경우에는 설면으로 0.5mm연장하는 것이 파절 강도면에서 유리하다고 사료된다. The purpose of this study was to evaluate the fracture strength of porcelain laminate veneer with various lingual extention length when incisal restoring. Sixty recently extracted, intact maxillary incisors were used and stored in a physiologic saline solution from the time of extraction. Seating form was preparation at the labial surface of each tooth with a water-cooled round diamond bur. Standard block was formed with 32 Gauge and 24 gauge wax at tooth labial and lingual surface. Lingual extention length differed according to each group. (group Ⅰ:0.5mm, groupⅡ:1mm, group Ⅲ:2mm, group Ⅳ:0mm) All tooth specimens were impressioned with examix(GC Inc., Japan). Refractory cast were maked with refractory die material(Ceramco Inc., U.S.A.) Laminate porcelain (Ceramco Ⅱ Veneer porcelain, Ceramco Inc.,U.S.A.) was condensed in refractory die cast and baked according to the manufacturer's recommendations. Each surface was contoured with low speed diamond bur according to guide block. All porcelain specimens were sandblasted and ultrasonically cleaned in distlled water for 3 minutes. Then,all porcelain specimen were etched with 8% hydrofluoric acid for 5 minutes. Sixty specimens were bonded with composite resin cement(Chocie Porcelain Veneer System, Bisco Inc., U.S.A.) according to manufactur's directions. The fracture loads of the specimen were measured by Instron universal testing machine. The mean values of fracture loads for the groups were statistically compared by Duncan's multiful range test. The result were as follows; Mean fracture strengths of each group were 86.95Mpa in no lingual extention group, 44.98Mpa in 0.5mm lingual extention group, 27.47Mpa in 1mm lingual extention group, 19.61Mpa in 2mm lingual extention group. There was a statistically significant difference between all group (p<0.01).

Porcelain Laminate veneer 절연 피복시 설측 연장 길이에 따른 파절강도의 연구

박종한 경북대학교치과대학 1995 慶北齒大論文集 Vol.12 No.2

文藝作品 解釋의 問題

金鍾太 제주대학교 1983 논문집 Vol.15 No.1

弗素溶液養齒事業 事例硏究

金鐘培,白大日 대한치과의사학회 1994 대한치과의사학회지 Vol.15 No.7