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미국 치과위생사 및 치과조무사 인정기준과 연관된 한국 보건의료법규 및 교육과정 비교 분석
손형석 청주대학교 보건의료과학연구소 2012 보건의료과학연구 Vol.1 No.1
Dental hygienists should be specialized as a small number and the main duties should be changed from clinical assist to prevention, oral health promotion, and management of patients with special needs. For accomplishing this goal, the efforts should be focused first on the balance of manpower between dental hygienists and assistants. According to the medical law in Korea, dental hygienists perform preventive treatment, clinical assist and health promotion activity, which makes the basis that dental hygienists' position should be changed from dental technician to dental care provider.
[기술논문] 폴리우레탄 코팅제에 있어서 Hard Segment와 Soft Segment의 조성 및 함량변화가 내마모성에 미치는 영향
손형석(Hyung-Suk Son),전동근(Dong-Geun Jeon),박성진(Seong-Jin Park),김용성(Yong-Sung Kim),권귀택(Kwi-Teag Kwon),김기수(Ki-Soo Kim) 한국자동차공학회 2014 한국 자동차공학회논문집 Vol.22 No.5
Weatherstrip coatings of urethane and silicon type which are fit to EPDM and thermoplastic materials are used in sealing systems for automotive applications for noise reduction and high slip characteristics for external applications, respectively. Polyurethane binder was successfully synthesized from poly(butyladiphate)diol (PBAD), poly(tetramethylene)glycol (PTMG) and isocyanate as starting materials. Then, polyurethane coating agents were prepared by using various additives. To investigate effects of segment types on the abrasion resistance of polyurethane coating agents, thin films based on polyurethane coating materials were fabricated. With increasing the amount of hard segment in the coating agent, abrasion resistance, modulus and tensile strength of the coating films were improved, but the elongation of the coating films was decreased.