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永久前齒의 齒根發育段階에 따른 Electric Pulp Stimulation에 對한 齒髓反應
崔在弘 大韓小兒齒科學會 1979 大韓小兒齒科學會誌 Vol.6 No.1
The author studied the response to the stimulation of an electric pulp stimulator of healthy 854 permanent anterior teeth in 122 children aged from six to eleven years old, during different stages of tooth development. The results were as followings: 1) In completely open apices, 13.1% (18 teeth) showed positive responses, and 86.9% (120 teeth) showed negative responses. In two-thirds open apices 33.1% (75 teeth) showed positive responses, and 66.9% (152 teeth) showed negative responses. In one-third open apices 57.8% (118 teeth) showed positive responses, and 42.2% (86 teeth) showed negative responses. In closed apices 80.0% (228 teeth) showed positive responses, and 20.0% (57 teeth) showed negative responses. 2) The number of positive responses increased in each upper and lower central incisors during the stages of root development, but not in upper lateral incisors. 3) There were no significant differences statistically in responses between the teeth of the right and left sides and the upper and the lower jaw, in the same stages of root development.
최재홍,구태용,김철,이건우,오영진,류창완 商志大學校 生産技術硏究所 2002 生産技術論叢 Vol.11 No.-
The electronic money and electronic payment system is the corporation of all information technology and social infrastructures. This consists of harmony between information, security, verification, laws and organizations. It came from the unit electronic cash at the beginning, and has been evolved to the electronic payment system. At the point of view of producing money, it could carry the maximized benefit. Therefore, the competition and cooperation (between region, nation and company) occurred at the same time. We will discuss the direction of new electronic money evolution with examination of various ways.