• Proceedings of the Korean Information Science Society Conference
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• 2008.06b
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• pp.281-285
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• 2008

본 논문에서는 임의의 두 얼굴간의 얼굴 변형을 시뮬레이션하는 방법으로서 직선형 경로를 이용한 얼굴 모핑 알고리즘을 소개한다. 이 때 두 얼굴 모델은 서로 독립적으로 3D 스캔되어 텍스처매핑을 거쳐서 생성된 별도의 3D 모델로서, 본 알고리즘은 이러한 얼굴 모델들간의 버텍스와 폴리곤의 개수와는 상관없이 자연스러운 모핑을 구현하는 특징을 갖는다. 알고리즘의 주요 기능으로는 절단면의 생성, 3 차원 메쉬의 2D 메쉬화, 대응 영역의 설정, 대응 폴리곤 탐색 및 보간 데이터 추출등이 포함된다.

• Journal of the Korean Geotechnical Society
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• v.17 no.4
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• pp.231-239
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• 2001

건설 현장에서 널리 사용되고 있는 그라운드 앵커의 거동 특성을 연구하기 위하여 계측기를 부착한 일곱 개의 그라운드 앵커를 국내에 널리 분포되어 있는 화강 풍화토 지반인 $\bigcirc$$\bigcirc$$\bigcirc$대학교 지반 시험장에 설치하여 인발 시험을 수행하였다. 저압 그라우트 인장형 앵커 3개와 압축형 앵커 4개를 시험하였고, 시험은 AASHTO 규정에 의거한 인발시험, 크리프시험, 장기거동시험을 수행하였다. 시험 결과로부터 화강 풍화토 지반에 설치된 저압그라우트 직선형 앵커의 지반과의 마찰계수, 크리프 변형율, 하중감소 특성을 평가하였다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.303-304
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• 2013

• Proceedings of the KIEE Conference
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• 1981.07a
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• pp.76-78
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• 1981

• Korean Journal of Materials Research
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• v.1 no.3
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• pp.139-144
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• 1991

The geometries and energies of $C_2-C_5$ clusters have been calculated using simple semiempirical potential energy functions. The results of the calculations show that the most stable structure of the $C_2-C_5$ clusters is linear and that not only the rhombic $C_4$ but also the Y-shaped $C_4$ hale similar energy to the linear $C_4$.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.619-620
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• 2007

본 논문에서는 초고압 케이블용 중간접속재의 하나인 프리몰드형 직선접속재의 기본 설계를 바탕으로 당사에서 지난 2006년 네덜란드 KEMA에서 IEC 62067 규격에 맞는 접속재를 개발하여 신뢰성 인증을 받았다. 그 접속재에 저유전율을 갖는 실리콘 고무를 적용했을 때의 전계집중지역의 전계를 완화시키는 방안을 고안하였다. 프리몰드형 직선접속재의 소형화를 위해 고유전율 실리콘 고무와 저유전율 실리콘를 적용하였다. 실제 제품을 생산에 앞서 전계해석 시뮬레이션을 통해 프리몰드형 직선 접속재의 소형화 가능성을 예측해 본다.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2004.05a
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• pp.469-472
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• 2004

This paper proposed and analyzed the Serial Piston Actuator(SPA) by using mechanical spring system coupled with linear actuator though the simplified structure which was verified practical experiments. The input voltage characteristics of a linear actuator are analyzed on the structure of the Linear Actuator Model System. Simulation and experimental result have been performed for the verification of the proposed system and the voltage characteristics applied to a actuator winding by electromechanical energy conversion theory. This paper proposed and analyzed the Linear Actuator Model(LAM) by using Matlab program with linear actuator was verified computer simulation based on the energy conversion theory.

• Journal of Dental Rehabilitation and Applied Science
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• v.34 no.2
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• pp.80-88
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• 2018

Purpose: Implant surface modification and implant design are the principle targets for achieving successful primary stability. The aim of this study was to measure implant stability quotient (ISQ) values of sandblasted, large-grit, acid-etched (SLA) implants with tapered straight body design during the healing period, and to determine the various factors affecting implant stability. Materials and Methods: To measure implant stability, resonance frequency analysis (RFA) was performed in 26 patients (13 women and 13 men) with 44 SLA implants with tapered straight body design. Implant stability (ISQ values) was evaluated at baseline and healing abutment connection (12 weeks), and the correlations between RFA and insertion torque (IT), bone quality, and jawbone were determined. Results: The mean ISQ value of the implants was $69.4{\pm}10.2$ at the time of implant placement (baseline) and $81.4{\pm}6.9$ at the time of healing abutment connection (P < 0.05). Significant differences were found between RFA and bone quality and between RFA and jawbone (P < 0.05). No significant differences were found between RFA and IT, insertion area, fixture diameter, and implant length (P > 0.05). Conclusion: ISQ values of SLA implants with tapered straight body design were high at baseline and healing abutment connection. It was concluded that SLA implants with tapered straight body design show improved primary and secondary stability, and that immediate or early loading may be applicable.

• Journal of the Korean Society for Marine Environment & Energy
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• v.12 no.4
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• pp.273-278
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• 2009

Overtopping Wave Energy Convertor (OWEC) is an offshore wave energy convertor for collecting the overtopping waves and converting the water pressure head into electric power through the hydro turbines installed in the vertical duct which is fixed in the sea bed. The numerical wave tank based on the commercial computational fluid dynamics code Fluent is established for the corresponding analysis. Several incident wave conditions and shape parameters of the overtopping device are calculated. The straight line type and parabolic type of the sloping arm are compared in the optimal designing investigation of the overtopping characteristics and discharge for OWEC device. The numerical results demonstrate that the parabolic sloping arm is available for wave running up and the overtopping discharge increasing.

• Korean Journal of Ecology and Environment
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• v.47 no.4
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• pp.342-349
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• 2014

This study was conducted to identify the bloom-forming Anabaena strains with two phenotypes (straight-type and coil-type) isolated from North Han River (Sambong-ri Joam-myun) using 16S rDNA sequence. The odor material producing potential was also examined using the geosmin-synthesizing gene cluster. Despite of striking morphological difference of the two stains, resembling A. circinalis and A. crassa species, the phylogenetic analysis using 16S rDNA identified the both strains as a single species of A. circinalis with high genetic similarity (98%~100%). Also, two Anabaena strains showed to possess the geosmin-synthesizing gene cluster, indicating that they are capable of producing the odor substance. This study is the first report that provides the direct evidence of geosmin production in the gene level by A. circinalis in Korea, and provides important basic information to identify the source alga of geosmin increase and its management in North Han River.