• 한국의류학회지
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• 제29권8호
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• pp.1114-1124
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• 2005

The purpose of the paper is to find the elements of jacket pattern far the obese women who went to slenderize their shape by optical illusion. Representative four subjects participated in wear tests. Subjective evaluation of the visual appearance we collected and, at the same time, 3D clothing air volume was observed for the four types of experimental jackets. As results it was found that narrower shoulder width, back upper width, and front waist width resulted in slender look, however, back abdomen width and front shoulder length induced more slender appearance in waist area. The result of the distance between clothing and skin measured by 3D scanner clearly demonstrated the distribution of ease due to the elements of pattern, which is useful to find the pattern variables responsible for the slender appearance of the obese women.

• 한국의류산업학회지
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• 제23권6호
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• pp.744-757
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• 2021

This study aims to develop a bodice and a jacket in 3D of the late 19th to early 20th based on the pattern drafting book of Gordon S. S., which contains body measurement method and pattern drafting system. The findings of this research are as follows. First, female tops of the late 19th to early 20th century are categorized as outer, jacket, vest, and bodice. Of these, this study highlights the jacket, which can be divided into 4 types: 4 kinds of basic jacket, 2 kinds of riding jacket, bolero jacket, and newmarket jacket. Second, by referring to Gordon's pattern drafting system and book, a bodice was developed in 3D format based on the adherence to the following steps: analysis of the pattern drafting system, pattern drafting, 3D virtual simulation, 3D virtual fitting analysis, and the pattern correction. A bodice pattern corrected by 3D virtual clothing simulation results was proposed. Last, a basic sleeve and collar pattern for a basic jacket was drafted, which was followed by the correction and transformation of the bodice pattern. The jacket developed shows great fit except for the issues at the armhole line and shoulder, which were caused by the unique shape of the sleeves(big sleeve head) of the time. The study attempted to develop the past costumes in 3D, providing the basis for interdisciplinary research in the field of fashion history field and suggesting a new approach for the virtual restoration of costumes. Future studies should target to 3D virtual simulation in accordance to the 3D avatar pose in the developed virtual costume.

• 한국콘텐츠학회논문지
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• 제11권4호
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• pp.428-439
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• 2011

종의 소리는 형상과 합금 특성에 큰 영향을 받는 것으로 알려져 있다. 정확한 형상데이터 측정 방법과 합금성분 데이터를 획득하기 위한 방법의 개발은 종의 연구 뿐 아니라 체계적인 관리에도 매우 중요하다. 광삼각방식을 적용한 레이저스캐너로 정확도가 높은 종의 형상데이터 획득하기 위한 스캐닝 및 모델링 방법들을 제안하였으며 획득된 3차원 형상데이터를 기반으로 높이, 구경 등 두 점간의 거리 뿐 아니라 곡률, 체적, 두께 등 임의의 데이터를 획득할 수 있는 데이터 구축방법을 제시하였다. 합금성분데이터 분석에서 는 기존의 시편 측정방법 대신에 비파괴 측정 방법을 제시함으로써 한국종의 손상 및 부분적인 데이터의 획득이라는 한계를 극복할 수 있도록 하였다. 제안된 방법에 따라 18점의 한국종에 대한 형상 및 합금성분 데이터를 수집하였으며 기존 측정치의 오류를 수정하였다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제41회 하계 정기 학술대회 초록집
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• pp.202-202
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• 2011

The research of 3-dimensional (3-D) scaffold for tissue engineering has been widely investigated as the importance of the 3-D scaffold increased. 3-D scaffold is needed to support for cells to proliferate and maintain their biological functions. Furthermore, its architecture defines the shape of the new bone and cartilage growth. Polycaprolactone (PCL) has been one of the most promising materials for fabricating 3-D scaffold owing to its excellent mechanical property and biocompatibility. However, there are practical problems for using it, in vitro and in vivo; extracellular matrix components and nutrients cannot penetrate into the inner space of scaffold, due to its hydrophobic property, and thus cell seeding and attachment onto the inner surface remain as a challenge. Thus, the surface modification strategy of 3-D PCL scaffold is prerequisite for successful tissue engineering. Herein, we utilized a mussel-inspired approach for surface modification of 3-D PCL scaffold. Modification of 3-D PCL scaffolds was carried out by simple immersion of scaffolds into the dopamine solution and stimulated body fluid, and as a result, hydroxyapatite-immobilized 3-D PCL scaffolds were obtained. After surface modification, the wettability of 3-D PCL scaffold was considerably changed, and infiltration of the pre-osteoblastic cells into the 3-D scaffold followed by the attachment onto the surface was successfully achieved.

• 한국방사선학회논문지
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• 제13권7호
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• pp.955-960
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• 2019

전산화단층검사는 많은 방사선을 받을 수 있으며, 한 명의 환자에서 반복적으로 시행되는 경우가 위험도는 매우 높다. 어린이의 경우에 방사선에 의한 암 발생률이 더 높다고 보고하고 있다. 3D 프린트는 여러 분야에 적용하기 위해서 연구되고 있으며, 여러 응용 분야중 방사선 차폐체 제작 및 재료에 대한 연구가 최근 진행되고 있다. 3D 프린터의 목적은 기존의 판넬 형태의 차폐체를 대체하고 인체의 형태를 따라 맞춤형 제작을 하는 것이 최종 목적이기 때문에 3D 프린터에 입력할 3차원정보처리에 대한 연구도 매우 중요하다. 본 연구에서는 스테레오 비전의 깊이지도(depth map) 생성 기술을 이용하여 환자 맞춤형 안구차폐체 제작의 전단계인 인체표면의 3차원 데이터를 계산하고 활용 가능성을 연구하고자 하였다. 알려진 3차원 정보처리의 방법들에 비해서 비교적 간단한 방법으로 제안된 결과 안면부 3차원 정보추출을 위한 최소한의 정보가 추출되었다. 본 연구의 결과는 자연광을 적용한 스테레오영상의 장점과 한계점을 제공하였고 향후 안구 차폐체 제작을 위한 기초자료가 될 것으로 판단한다.

• 한국의류산업학회지
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• 제19권5호
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• pp.635-645
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• 2017

The industry of character toys is increasing and new characters are constantly being developed. However, the development of 2D cover patterns for toys is time-consuming due to frequent pattern modifications made through trial and error. Studies are now underway to obtain 2D clothing patterns from 3D body data, however, little research has been done on 2D pattern of character toys. This study suggests efficient guidelines to develop 2D cover patterns with a reasonable accuracy and processing time. Two 3D models of a dog and rabbit were used to develop 2D cover patterns. Independent variables of this study are set as 3 levels of triangle area (small, medium, and large) that influence the efficacy of 3D and 2D pattern development. The determination of the appropriate triangular area was based on the area and shape change of the 2D pattern. A medium or large triangle area was shown to be suitable for a character dog with a smooth curved surface. However, the appropriate triangle area was small if the characteristics of the curved surface are complicated as in the case of rabbit. The head of a dog (a double-curved surface) and the curved forepaw of a rabbit (a triangular area) should be small when the characteristics of the curved surface (such as the hind leg of a rabbit having a large convex surface and a small surface area) are complicated. Grouping by 3D surface characteristics could be a suitable guideline for the triangle area selection.

• 산업경영시스템학회지
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• 제17권31호
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• pp.155-161
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• 1994

This study presents a systematic and mere economical method to acquire 3-D anthropometric data by the use of Moire' interferometry, image processing and computer vision techniques. An experiment was performed to measure sixty-one anthropometric variables, such as height weight neck-base circumference, contained areas of various contours etc.., of thirty-six male subjects with wide range of ages (14 years to 43 years' old). Cluster analysis was performed with contour information, and somatotyping was performed to obtain four distinct types of body shape. The results were then compared with classifications obtained from traditional somatotyping methods which showed 71.88% consistency. This study developed a simple and inexpensive method for 3-D anthropometric data acquisition and suggests the quantification and interpretation scheme that will enable us to utilize the data for industrial applications.

• 한국군사과학기술학회지
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• 제15권5호
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• pp.712-719
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• 2012

Penetrator with enhanced lateral effect(PELE) is a newconcept projectile, without dynamite and fuze. It consists of high-density jacket, closed at its rear end and filled with a low-density filling material. To study the explosion characteristics of PELE, by AUTODYN-3D code, the calculation models of projectile body and bullet target are established and the process of penetrating aluminum-2024 alloy target of PELE is simulated, and the scattering characteristics after penetrating aluminum-2024 alloy target of PELE are studied by different initial velocity. The explicit finite element analysis of PELE fragmentation was implemented with stochastic failure criterion in AUTODYN-3D code. As expansion of filling, the fragments were obtained velocities and dispersed laterally and further more enhancing the damage area largely. The number and shape of the PELE fragments were different depend on impact velocity and incidence angle of filling which fragment generated during penetration and lateral dispersion process.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2004년도 봄 학술발표논문집 Vol.31 No.1 (B)
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• pp.490-492
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• 2004

영화, 애니메이션, 게임 등 디지털 문화 컨텐츠에서 의상을 입은 캐릭터들의 사실성이 강조되는데, 기존의 패션 CAD나 의상 애니메이션 소프트웨어들은 디자인에 있어서 여러 단계의 작업을 거쳐야 하고 의상 디자인의 전문성을 요구한다 특히, 최근 우리 문화 원형의 디지털 컨텐츠화로 디지털 한복의 수요가 증가하고 있으며, 한복은 재단이나 착용방식 등에서 양복과는 구성학적 차이점을 지님에도 불구하고 디지털 한복 제작을 위한 전문 시뮬레이션 도구는 전무하다. 따라서, 본 연구에서는 전통적인 한복의 제작에서 사용하는 신체 치수 측정방법과 옷본 및 체형에 따른 사이즈 조정 방법을 지식베이스로 구축하였다. 이를 통해 한복에 대한 사전 지식이 업는 사용자들도 가상 캐릭터에 쉽게 한복을 착용 시킬 수 있는 지식 기반 한복 드레이핑 방법을 제안한다.

• 한국산업융합학회 논문집
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• 제26권4_1호
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• pp.529-536
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• 2023

In this study, the spur gear with honeycomb lattice structures are designed. The pitch diameter and body length of the spur gear are Ø93 mm and 104.0 mm, respectively. The designed gear was printed using Powder bed fusion (PBF) 3D printer. The gear is 3D printed perfectly. Even the teeth and honeycombs of the gear were output in the same way as the design shape. The printed gear with honeycomb lattice structure has a 24% smaller cross-sectional area and 29% smaller volume and weight than conventional solid structure gears. The surface roughness is approximately 4.5㎛, and the hardness is 345 HV.