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생분해성 Calcium Metaphosphate골이식재의 골조직재생효과에 관한 연구
채한승,이용무,양승민,천성수,김석영,구영,정종평,한수부,최상묵,류인철,Chae, Han-seung,Lee, Yong-Moo,Yang, Seung-Min,Chun, Sung-Soo,Kim, Suk-Young,Ku, Young,Choung, Chong-Pyoung,Han, Soo-Boo,Choi, Sang-Mook,Rhyu, In-Chul 대한치주과학회 2003 Journal of Periodontal & Implant Science Vol.33 No.1
Periodontal regeneration therapy with bone-substituting materials has gained favorable clinical efficacy by enhancing osseous regeneration in periodontal bony defect. As bone-substituting materials, bone powder, calcium phosphate ceramic, modified forms of hydroxyapatite, and hard tissue replacement polymer have demonstrated their periodontal bony regenerative potency. Bone-substituting materials should fulfill several requirements such as biocompatibility, osteogenecity, malleability, biodegradability. The purpose of this study was to investigate biocompatibility, osteo-conduction capacity and biodegradability of $Na_2O$, $K_2O$ added calcium metaphosphate(CMP). Beta CMP was obtained by thermal treatment of anhydrous $Ca_2(H_2PO_4)_2$. $Na_2O$ and $K_2O$ were added to CMP. The change of weight of pure CMP, $Na_2O$-CMP, and $K_2O$-CMP in Tris-buffer solution and simulated body fluid for 30 days was measured. Twenty four Newzealand white rabbits were used in negative control, positive control(Bio-Oss), pure CMP group, 5% $Na_2$-CMP group, 10% $Na_2O$-CMP goup, and 5% $K_2O$-CMP group. In each group, graft materials were placed in right and left parietal bone defects(diameter 10mm) of rabbit. The animals were sacrificed at 3 months and 6 months after implantation of the graft materials. Degree of biodegradability of $K_2O$ or $Na_2O$ added CMP was greater than that of pure CMP in experimental condition. All experimental sites were healed with no clinical evidence of inflammatory response to all CMP implants. Histologic observations revealed that all CMP grafts were very biocompatible and osseous conductive, and that in $K_2O$-CMP or $Na_2O$-CMP implanted sites, there was biodegradable pattern, and that in site of new bone formation, there was no significant difference between all CMP group and DPBB(Bio-Oss) group. From this result, it was suggested that all experimental CMP group graft materials were able to use as an available bone substitution.
수업 에피소드 개발을 위한 탁구의 기원과 확산과정 연구
채한승(Han Seung Chae) 한국체육교육학회 2011 한국체육교육학회지 Vol.16 No.1
본 연구는 사회사적인 관점에서 탁구의 역사를 고찰하여 그 기원과 확산과정을 규명하기 위하여 수행되었으며, 그 결과는 관련 학계에 기여함은 물론이며, 학교 체육과 생활 체육의 수업 자료로도 활용될 수 있을 것이다. 1, 2차 자료를 활용하여 상호주관적논의(Inter-subjective Discussion)의 과정을 통해 연구를 수행한 결과 다음과 같은 결론을 얻었다. 첫째, 탁구는 영국의 스포츠 문화의 발달 맥락과 흐름을 같이하며, 그 기원은 영국의 근대 테니스에서부터 영향을 받은 것으로 확인 할 수 있으며 현재의 탁구와 유사한 형태로 경기가 행해지게 된 시기는 1800년대였다. 둘째, 탁구의 발달 과정을 고찰한 결과 1901년 12월 잉글랜드 핑퐁협회의 창립 이 후 하나의 스포츠로 인식되기 시작하면서부터 영국 내에서 급진적인 대중화가 이루어졌다. 셋째, 1926년 국제탁구연맹이 조직된 후 세계대회가 개최되면서 전 세계인의 관심을 모았으며 확산 과정에서 핑퐁협회가 탁구협회로 병합되면서 긍정적으로 변화해왔다고 볼 수 있다. 결론적으로, 세계 여러 나라의 전통 민속경기에도 라켓 볼 경기의 형태는 다양한 형태로 존재하나 탁구가 현대의 모습으로 발전하기 시작한 것은 영국에서부터였고 각종 협회와 대회를 통해 확산되어 왔던 것으로 확인할 수 있다. This study intends to define the origin and organizing process of table tennis by examining the history of table tennis from a perspective of social history, and the results aim to be used in educational materials for physical education in schools or physical activities at home. The results of the study are as follows. First, the origin of table tennis is not definite, but it is widely believed that it was derived from tennis that was devised in medieval England and the modern form of table tennis began in the late 1800s. Second, in terms of the organizing history, table tennis was first recognized as a sport when England Ping-Pong Association was founded in December 1901. Third, in order to understand the diffusion history of table tennis, The diffusion of table tennis was brought to great attention of the world when the International Table Tennis Federation was founded in 1926. During its diffusion stage, the Ping-Pong association was merged into the International Table Tennis Federation, these changes and issued were overcome by voluntary efforts of participating players and right decision-making of the federation. In conclusion, various types of games using rackets and balls are found in traditional games of many countries, but table tennis is thought to have started developing as the modern version in England.