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수은함량과 응축압이 치과용 아말감의 표면조도에 미치는 영향
홍운표,김철위 대한치과기재학회 1984 대한치과재료학회지 Vol.11 No.1
A comparative investigation on surface roughness of four kinds of dental amalgam, three of those were manufactured in Korea, has been done for variations in mercury content and condensation pressure. Three different mercury content-the normal, recommanded level and 5% more and less than this and two condensation pressure-10MPa and 14MPa were selected. And surface roughness of amalgams in three conditions-(1) unpolished, (2)metallurgically polished, and (3) polished with pumice and zinc oxide paste, was measured with a Surface Profile Recorder. From the experiments, the following results were obtained; 1. In every case, no statistical differences were found in surface roughness for the variation of condensation pressure. 2. Atomized high copper amalgam showed the highest surface roughness for the level of 5% mercury less than recommanded, but conventional lathe cut and admixed amalgams didn't show much difference in surface roughness for the variation of mercury content. 3. When metallugically polished, each amalgam showed the highest surface roughness for the level of 5% mercury less than recommanded. 4. In all of the cases, there wasn't much difference between surface roughness for the recommanded mercury level and that for the level of 5% mercury more. 5. In case of the recommanded mercury content, there wasn't much difference in surface roughness for the types of amalgam alloys.
홍운표 ( Yun Pyo Hong ) 중국한국(조선)어교육연구학회 2016 한국(조선)어교육연구 Vol.11 No.-
This paper is written about how to effectively prepare for Korean language education by utilizing the digital data to those who want to learn Korean from abroad.Modern society can be called the information society. Because of the increasing number of human knowledge, we can only be extracted and used only necessary information among the accumulated information.In order to extract information needed for us among a lot of information, we are using digital data.Classified as digital data, visuals, multiple media data and multimedia data. Visual data can be classified as text data and image data. Auditory data includes the audio materials. Multimedia data shall refer to video material. Visual data and auditory data is the effect was short compared to the multimedia data. Multimedia data is visual aural complex to process the materials. Nevertheless, these three data are being used very efficiently.Nevertheless professors and students are mostly used paper materials in the process of the Korean education abroad. Digital Korean Studies materials for overseas Korean education is very broad and diverse. So in order to take advantage of the digital data to the Studies overseas Korean education should be the task of collecting and sorting the digital data Studies has been established so far followed: Voice data, Image Data, Footage, Source text.This paper is introducing these digital data needed for overseas Korean education.