http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박석희 ( S. H. Park ),정규원 ( K. W. Jeong ) 충북대학교 산업과학기술연구소 2014 산업과학기술연구 논문집 Vol.28 No.2
Nowadays quadruped walking robots are widely developed because that there are less restrictions in ground condition. In this paper a quadruped walking robot was designed. At the front top of the robot a camera was attached to find a target object, and then approach to the object. While the robot is walking toward the object, the coordinate of the object image at the camera was obtained along the robot path. The robot with a camera was modeled using an engineering software ADAMS and simulation was conducted.
생체 적합성 고분자 재료를 이용한 다공성 지지체 제작에 관한 연구
박석희(S. H. Park),김효찬(H. C. Kim),양동열(D. Y. Yang) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
Most tissue engineering strategies for creating functional replacement tissues or organs rely on the application of temporary three-dimensional scaffolds to guide the proliferation and spread of seeded cells in vitro and in vivo. Scaffolds should be satisfied following requirements; macrostructure to promote cell proliferation, pore interconnectivity, pore size ranging from 200 to 400 ㎛, surface chemistry and mechanical properties. Rapid prototyping techniques have often been used as an useful process that fabricates scaffolds with complex structures. In this study, a new process to fabricate a threedimensional scaffolds using bio-compatible polymer has been developed. It employs a highly accurate three-dimensional positioning system with pressure-controlled syringe to deposit biopolymer structures. The pressure-activated microsyringe is equipped with fine-bore nozzles of various inner-diameters. In order to examine relationships between line width and process parameters such as nozzle height, applied pressure, and speed of needle, experiments were carried out. Based on the experimental results, three-dimensional scaffold was fabricated using the apparatus. It shows the validity of the proposed process.