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플라즈마 표면처리에 의한 폴리카보네이트의 표면에너지 및 구리박막과의 접착력 변화에 관한 연구
조병훈,이원종,박영호,Cho Byeong-Hoon,Lee Won-Jong,Park Young-Ho 한국재료학회 2005 한국재료학회지 Vol.15 No.11
Polycarbonates are widely used as housing materials of electronic handsets. Since the polycarbonate is electrically insulating, there should be a conducting layer on the polycarbonate for EMI shielding. In this study, we sputter deposited Cu films on the polycarbonate substrates for EMI shielding. Plasma treatments of polycarbonates were used to increase the adhesion strength of the Cu film/polycarbonate interface. The surface energy of the polycarbonate was greatly increased from $30mJ/m^2 \;to\; 65mJ/m^2$ by a 200 W $O_2$ plasma treatment for 10s. It is thought that this is because of the ion bombardment. The adhesion strength of the sputter deposited Cu film to the polycarbonate was quantitatively measured by a 4 point bending tester. A moderate plasma surface treatment of the polycarbonate increased the Cu film/polycarbonate adhesion strength by $30\%$. The EMI shielding efficiency of the sputter deposited $10{\mu}m$ Cu lam on the polycarbonate showed 90dB in the range of 100MHz to 1000MHz.
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조병훈 한국체육과학회 2004 한국체육과학회지 Vol.13 No.1
The purpose of this study was to Analysis of leadership styles in sport event styles and sport types. Subjects for this study were contacting sport; 116(team; 93, individual; 73) and parallel sport; 115(team; 68, individual; 47), according to sport types and event styles; Total subject of this were 281 players . Leadership styles were tested by Kim, Byeong-hyeon, Yi Han-gyu, Ha, hyeong-ju‘s『The Korean LSS』. To prove the mean error were 2-way ANOVA. The results of the study are as the following : 1. In the factors of Training-Instruction Behavior, Democratic behavior and Positive feedback, no different in sport types and event styles..2. In the factor of Authoritative behavior, individual sport more higher than team sport in event styles but parallel sport more higher than contacting sport in sport types. 3. In the factor of Social support Behavior, parallel sport more higher than contacting sport in sport types but no different in event styles.
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조병훈 대한수의사회 2003 대한수의사회지 Vol.39 No.3
축산물의 유해물질 잔류예방을 위해서는 농가에서의 올바른 동물약품의 사용과 철저한 사양관리가 필수요건이라 할 수 있다. 더불어 국내산 및 수입 축산물에 대한 철저한 잔류검사 체계를 잘 활용하여 축산식품의 안전성을 지속적으로 확보토록 노력하고 현행 잔류검사를 보다 집중적이고 효율적인 체계로 발전시켜 나가야 할 것이다.
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