• 전력전자학회논문지
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• 제9권1호
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• pp.1-9
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• 2004

본 논문에서는 로터 블레이드, 발전기, 로터 블레이드와 발전기에 연결된 고/저속 회전축 및 회전축간의 회전력을 전달하는 기어 시스템 등 다수의 몸체가 서로 상대적인 운동이 가능한 채 연결되어 있는 단일로터 수평축 풍력발전 시스템을 다몸체 시스템으로 간주한 후, 다몸체 역학을 이용한 풍력발전 시스템 모델링 기법을 제안하였다. 이를 기반으로 풍력발전 시스템의 성능 해석을 위한 시뮬레이터를 개발하였다. 그리고 다양한 시뮬레이션을 통해 제안된 풍력발전 시스템 모델링 기법과 시뮬레이터의 타당성을 검증하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 추계학술대회논문집 I
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• pp.85-89
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• 2001

Hamiltonian modeling approach has been extensively adopted for rigid body dynamics whereas its usage for deforming flexible continuum dynamics has been limited. A set of Hamilton＇s equations for flexible body motion with finite deformation has been derived and applied for a nonlinear impact problem.

• 패션비즈니스
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• 제19권3호
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• pp.130-143
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• 2015

By studying 3-D virtual human modeling, motion-capturing and clothing simulation for easier and safer work clothes development, this research aimed (1) to categorize heavy manufacturing work motions; (2) to generate a 3-D virtual male model and establish painting work motions within a 3-D virtual clothing simulation system through computerized body scanning and motion-capturing; and finally (3) to suggest simulated clothing images of painting work clothes developed based on virtual male avatar body measurements by implementing the work motions defined in the 3-D virtual clothing simulation system. For this, a male subject's body was 3-D scanned and also directly measured. The procedures to edit a 3-D virtual model required the total body shape to be 3-D scanned into a digital format, which was revised using 3-D Studio MAX and Maya rendering tools. In addition, heavy industry workers' work motions were observed and recorded by video camera at manufacturing sites and analyzed to categorize the painting work motions. This analysis resulted in 4 categories of motions: standing, bending, kneeling and walking. Besides, each work motion category was divided into more detailed motions according to sub-work posture factors: arm angle, arm direction, elbow bending angle, waist bending angle, waist bending direction and knee bending angle. Finally, the implementation of the painting work motions within the 3-D clothing simulation system presented the virtual painting work clothes images simulated in a dynamic mode.

• 한국의류산업학회지
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• 제26권1호
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• pp.78-87
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• 2024

This study aimed to propose an innovative teaching pedagogy using a half-scale body form in apparel design education and evaluate its effectiveness in augmenting students' understanding of ergonomic patterns. Constructed in alignment with Phoenix's (2018) study, which used 3D body scanning and digital editing software, the half-scale body form was created through a five-step process, encompassing body measurement, 3D body modeling, fabrication of a physical half-scale body form, pattern making, and evaluation. Implemented in an undergraduate patternmaking course offered at a 4-year university in the metropolitan Seoul, this instructional approach's effectiveness was gauged through students' course projects and exit interviews. The results underscored the positive impact of the proposed teaching pedagogy on students' grasp of ergonomic pattern development, fostering a keen understanding of diverse body shapes and sizes and the relationship between the human body and garments. Furthermore, it played a role in cultivating positive body image and self-endorsement among students. The research contributes meaningfully by presenting a fresh perspective in apparel design education, seamlessly integrating advanced anthropometric and technological tools into a conventional patternmaking classroom. It offers a novel learning experience for students majoring in apparel, creating a fun and interactive teaching environment.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2011년도 추계학술대회 논문집
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• pp.614-622
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• 2011

In this study, the computational structural dynamic modeling of floating offshore wind turbine system is presented using efficient equivalent modeling technique. Structural dynamic behaviors of the offshore floating platform with 5MW wind turbine system have been analyzed using computational multi-body dynamics based on the finite element method. The considered platform configuration of the present offshore wind turbine model is the typical spar-buoy type. Equivalent stiffness and damping properties of the floating platform were extracted from the results of the baseline model. Dynamic responses for the floating wind turbine models are presented and compared to investigate its structural dynamic characteristics. It is important shown that the results of the present equivalent modeling technique show good and reasonable agreements with those by the fully coupled analysis considering complex floating body dynamics.

• 한국의류학회지
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• 제28권7호
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• pp.974-982
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• 2004

The purpose of this study was to examine the influence of belief in body control on appearance satisfaction using structural equation modeling. In the structural equation model, self-esteem was included as a common predictor variable of belief in body control and appearance satisfaction, and the ideal body type and perceived body type were included as mediator variables. The data was collected from 96 female college students in the State of Washington, United States, Using AMOS 4, confirmatory factor analyses were conducted to fit the measurement models, and then the fit of the structural model was examined. The results of this study are as follows: The indirect effect of belief in body control on appearance satisfaction through its negative effect on ideal body type was significant. Yet, the direct path of belief in body control to appearance satisfaction and the indirect path through their common relationships with self-esteem were found not significant. These results indicate that higher body control belief may lead to lower appearance satisfaction due to the decreased size of ideal body type.

• 복식
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• 제66권3호
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• pp.147-161
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• 2016

This study analyzed the effects of job style on job satisfaction and turnover intention of fashion models, and the difference in the job style, job satisfaction and turnover intention by model activities period. Data was collected by surveying fashion models with more than 10 modeling experiences, and 230 responses were used in the data analysis. The results of were as follows: First, the job style of fashion models were classified into professional ability type, social relationship-focused type, future-oriented type and body-boasting type. Job satisfaction was classified into satisfaction with working conditions, satisfaction with model activities, and satisfaction with relationships. Turnover intention was classified into intention to change jobs, and intention to quit modeling. Second, being a professional ability type had a negative effect on satisfaction with working conditions, whereas being a future-oriented type had a positive effect on it. The professional ability type and social relationship-focused type had a positive effect on satisfaction with model activities, and the social relationship-focused type had a positive effect on satisfaction with relationships. Third, the future-oriented type and body-boasting type had a negative effect on the intention to change jobs. The social relationship-focused type, future-oriented type and body-boasting type had a negative effect on the intention to quit modeling. Fourth, there were significant differences in the professional ability type, human relationship-focused type, body-boasting type, intention to change jobs and intention to quit modeling by model activities period. Therefore, it is necessary for domestic fashion models to have the appropriate attitude to develop features and competency required for modeling projects and if improvements are made to enhance job satisfaction of fashion models, the fashion modeling industry is expected to make further developments.

• 한국통신학회논문지
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• 제34권9B호
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• pp.867-875
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• 2009

무선 신체망 (WBAN: Wireless Body Area Network)은 생체 신호를 검출하고 전송하기 때문에 인간의 생명과 직결되어 있다 그러므로 무선 신체망은 다른 망과 비교해 망의 신뢰성이 극도로 높아야 하기 때문에 이 신뢰성과 관련된 연구가 매우 중요한 분야로 부각되고 있다. 본 논문에서는 다중 오류 (multi-type failures) 가 발생한 무선 신체 망에서 노드의 오동작들에 대해 분석하고 오동작 분석에 대한 새로운 모델을 제시한다. 오동작 모델링을 위해, 각 노드들을 라우팅 기능의 유무에 따라 분류하고, 노드의 에너지가 완전 소비되었거나 노드가 악의적인 공격에 의해 오류가 발생되었을 경우 각 노드들의 동작을 세미 마르코프 프로세스 (Semi-Markov Process)를 이용하여 모델링하였다. 본 논문에서 제시된 모델은 다중 오류 (multi-type failures) 환경에서 무선신체망의 신뢰성 분석에 매우 유용하다.

• 한국전자통신학회논문지
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• 제19권3호
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• pp.633-640
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• 2024

이 연구는 헬스케어 분야에서 활용 가능한 AI 기반의 3D 체형 모델링 기술을 개발하고, 이를 통해 사용자의 체형 변화와 건강 상태를 모니터링 할 수 있는 시스템을 제안한다. 사이즈코리아의 데이터를 활용하여 2D 이미지로부터 3D 체형 이미지를 생성하는 모델을 개발하고, 다양한 모델을 비교하여 가장 성능이 우수한 모델을 선정하였다. 최종적으로, 개발된 기술을 통해 개인 맞춤형 건강 관리, 운동 추천, 식단 제안 등의 시스템 프로세스를 제안함으로써 질병 예방 및 건강 증진에 기여하고자 하였다.

• International Journal of Naval Architecture and Ocean Engineering
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• 제7권2호
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• pp.346-363
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• 2015

We have performed integrated dynamics modeling for a supercavitating vehicle. A 6-DOF equation of motion was constructed by defining the forces and moments acting on the supercavitating body surface that contacted water. The wetted area was obtained by calculating the cavity size and axis. Cavity dynamics were determined to obtain the cavity profile for calculating the wetted area. Subsequently, the forces and moments acting on each wetted part-the cavitator, fins, and vehicle body-were obtained by physical modeling. The planing force-the interaction force between the vehicle transom and cavity wall-was calculated using the apparent mass of the immersed vehicle transom. We integrated each model and constructed an equation of motion for the supercavitating system. We performed numerical simulations using the integrated dynamics model to analyze the characteristics of the supercavitating system and validate the modeling completeness. Our research enables the design of high-quality controllers and optimal supercavitating systems.