http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
치아의 활주 이동시 교정용 brackets와 arch wire사이에서 발생하는 마찰 저항력에 관한 비교 연구
민정미,서정훈 대한치과교정학회 1988 대한치과교정학회지 Vol.18 No.1
The purpose of this study was to evaluate and compare frictional forces generated between orthodontic brackets and arch wires. Independent variables were chosen for study: arch wire size and shape, arch wire material, bracket width , and second-order angulation between bracket and arch wire. Kinetic frictional forces of stainless steel (0.014", 0.016", 0.018", 0.016" X0.022", 0.018" X 0.022"), β-titanium (0.016" x 0.022") arch wires were measured on wide and junior edgewise twin brackets (0.018" x 0.022" slot). Instron was used to pull arch wires while 0。, 3。, 6, or 9。 angulation between and bracket was given. The results were as follows: 1. The frictional force of β-titanium wire was larger than that of stainless steel wire. 2. The frictional force was generally increased as the size of wire is increased. 3. The frictional force of retangular wire was larger than that of round wire. 4. As second order angulation was increased, the frictional force was also increased. 5. The frictioanl force was larger on a wide bracket than on a junior bracket.
閔晶湜,禹勝瓚,朴雄姬,梁德承 東新大學校 1997 論文集 Vol.9 No.-
The department stores in Korea, which represent the existing distribution industries, face a structural turning point. Especially, such environmental changes seriously threaten the department stores in Kwangju. In addition the big department stores and discount stores in Seoul opened or will open their branch shops in Kwangju, and so the keen competition of local industries is expected. If the big department stores with rich fund and advanced management know-how establish their branch shops in local areas, the status of existing local department stores will lowered as much. Therefore, the local department stores need to analyze and examine all conditions of competitors as well as their own current conditions and levels. The purpose of this study is to investigate how the department stores have been recognized by consumers as a pre-stage for facing the environmental changes, to schematize the consumer's preference for department stores in Kwangju spatially and to connect the properties which compose the image of a department store based on the perceptual position and competitive relations which the consumers recognize for four department stores (Garden, Songwon, Shinsegae and Funny) in Kwangju as research objects, and then to find the strength and weakness of a department store. This study uses PC-MDS program to grasp the competitive relations among department stores and make a positioning map. As a result of examining the matrix data about customers' responses for the degree of similarity of four department stores by each couple with a KYST analysis, Shinsegae and Songwon are superior to Garden and Funny. In addition, in order to interpret the axis (dimension) of scheme from KYST, this study abstracts 12 properties which compose the images of department stores and performs a PROFIT analysis, and furthermore consumers are asked to choose their preferred department stores in three conditions (gift purchase, dress purchase, and A/S and disposal of returned goods) and then this study conducts PREFMAP analysis. The result suggests that the consumers recognize Shinsegae and Songwon as the best department stores. Finally, the results of this study show the perceptual position of four department stores in Kwangju schematically and propose the position of the most ideal department stores, and this study suggests the direction of strategy for positioning of department stores in Kwangju, as a pre-stage to understand how the department stores are recognized by consumers, in order to cope with the environmental changes.
閔貞博,許永敏 全北大學校 1978 論文集 Vol.20 No.-
In the past our system of law had been developed into a formal principle of civic law but its modern tendency is that our law is being developed from individualism to collectivity and so day by day, law has been enlarged its field. Kaskel maintains that the core of the social law is the labour law, social though the former is not the latter itself. Therefore, I studied the developing process of labour law in this thesis. In other words I classified the history of Korean labour law into labour law in Lee-Dynasty, labour law in the period under japanese rule, labour law since emancipation from Japanese rule, labour law under American military Administration and labour law since Setting-up of Korean Government. In the developing process of amendment of labour law, I classified it into 1960s and 1970s. The followings are the typical features of regulation and amendment of Korean labour law: ① Regulations of the social welfare for the workers were enlarged and enforced. ② In the collective employer-labourer relation, the collective activity was largely restricted by the Government. ③ Self-administration of employer-labourer was changed into regulation of the Government. ④ The consultative system of employer-labourer was gradually realized and new view of employer labourer was established. In conclusion, law-spirit and spirit of obeying law of employer-labour was considerably improved. But aboriginality and organization of the labor law are not made. It is desirable that administration structure of labour should be raised from office to department and minister should take part in discussion of governmental policy. The office which takes sole charge of labour problems is necessary, and the minimum wage-law and good treatment of worker should be realized in the near future. The ideal employer-labourer relation is that its self-governing through talk and the consultative system should play its important part. At this moment, guidance of government is largely required. Employer-labourer relation should be moved from unit of enterprise to unit of district and national scale. Good consultative system should be made among Government, employer and labourer.