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윤대영 한국제품안전협회 1996 제품안전 Vol.44 No.-
통상산업부와 산업디자인 포장개발원은 지난 93년을 '산업디자인 발전 원년의 해'로 선포하고 산업발전 5개년계획을 수립. 중소기업 산업디자인 지도$\cdot$인재양성 등 산업디자인 발전에 적극 노력하고 있으며, 이를 지원받아 상품화 뿐만 아니라 수출 및 매출 증가를 이룬 성공사례를 엮어 보았다.
윤대영,강병재,김용선,이승훈,류다은,김완희,권오경 한국임상수의학회 2015 한국임상수의학회지 Vol.32 No.1
We evaluated outcomes of dogs surgically treated for grade 2 or 3 medial patellar luxation (MPL) with and without trochleoplasty. A retrospective study of 63 dogs with grade 2 or 3 MPL surgically treated with or without trochleoplasty was performed. Results of radiographic evaluation were expressed numerically as degenerative joint disease score and were compared between the groups with and without trochleoplasty. The study included 7 (7/68, 10.3%) cases of reluxation and 1 case of tibial tuberosity transposition implant failure. Reluxation and complications requiring additional surgery were confirmed in 3 cases (3/47, 6.4%) in trochleoplasty group and in 1 case (1/21, 4.8%) in nontrochleoplasty group. The nontrochleoplasty group showed a shorter recovery time than the trochleoplasty group (P < 0·05). There was a significant difference in degenerative joint disease scores over time between the groups, with nontrochleoplasty group having lower scores (P < 0·05). This study suggests that surgical treatment without trochleoplasty results in favorable outcomes compared to treatment with trochleoplasty. It is not mandatory to exclude trochleoplasty when performing surgery for grade 2 or 3 MPL, but we propose that surgical treatment without trochleoplasty is one option when choosing a combination of surgical techniques.
LBVH 순회를 이용한 거대 도체 구조의 레이다 단면적 분석
윤대영,이해승,이소영,박용배 한국전자파학회 2022 한국전자파학회논문지 Vol.33 No.9
In this study, the radar cross-section (RCS) of a large structure is analyzed using the linear bounding volume hierarchy (LBVH), which is a representative acceleration algorithm of the ray-tracing technique. A ray-tracing technique, which is a high-frequency method, is used to analyze the electromagnetic properties of large structures, and bounding volume hierarchy (BVH), a binary tree structure, is applied to reduce the intersection search time. The improvement in the calculation speed is quantitatively analyzed by dividing an arbitrary scatterer into several triangles. The calculation results are compared with those of multilevel fast multipole method (MLFMM) and ray-launching geometrical optics (RL-GO) using the Feko commercial software to verify the accuracy. The proposed technique can be utilized for the efficient RCS calculations of large structures.