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RISS 인기검색어
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- 저자 : 유영태 ( J . H . Choi (검색결과 7 건)
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유영태(Young-Tae Yoo),최병재(Byeong-Jae Choi),김진우(Jin-Woo Kim) 한국기계가공학회 2021 한국기계가공학회지 Vol.20 No.3
Typical implants are not specified the screw structure and the surface process according to the bone quality of the human body. The purpose of this study is to complement the shortcomings of the existing implant surface processing method. It is to propose a surface processing method that increases the adhesion between the implant and bone tissue by increasing the surface area per unit area of the implant. It is very important to establish precise and systematic process parameters when surface treatment of implants using lasers. Therefore, we intend to develop a process so that the implant can be a biocompatible structure using a Q-switching Nd:YAG laser with a wavelength of 1.06um. Implant surface treatment technology through this study will be used in the industry.
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펄스레이저 조사가 타이타늄 임플란트 표면처리 특성에 미치는 영향
유영태(Young-Tae Yoo),최병재(Byeong-Jae Choi),김진우(Jin-Woo Kim) 한국기계가공학회 2023 한국기계가공학회지 Vol.22 No.3
Recently, the clinical efficiency of dental components based on titanium has been demonstrated. The surface shape and roughness characteristics of the implants are evaluated after laser surface treatment. When material with high thermal conductivity is processed with a laser, the energy of the laser beam is instantaneously diffused into the material. Therefore, a laser beam oscillating in the form of a pulse was used. After the laser beam was irradiated on the surface of the implant, a 3D surface roughness meter and an optical microscope were used to analyze it. In this study, the surface area increased owing to testing the implant by applying the scribing method to the implant surface.
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박길문,박선종,최주호,유영태,Park, G.M.,Park, S.J.,Choi, J.H.,Yoo, Y.T. 대한설비공학회 1989 설비공학 논문집 Vol.1 No.3
A system of conservation equations for steady, oscillatory and pulsating duct flows are solved analytically by linearizing non-linear convective terms. Analytical solutions of velocity profiles for these flows are obtained in the form of infinite series. The experimental study for the air flow in a square duct ($40mm{\times}40mm$ and 400 mm long) is carried out to measure velocity profiles and other parameters by using a hot-wire anemometer with data acquisition and processing system. Major characteristics of the flows such as the classification of flow patterns, determination of critical Reynolds number and velocity profiles is accomplished from the experismental results.
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