• 한국생활과학회지
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• 제15권6호
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• pp.1073-1081
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• 2006

The development of foundation garment pattern on the typical adult women's body was carried out. By means of the flatted body surface shell, the foundation garment pattern was developed. And its fitting test also performed. The results of this study can be summarized as follows; 1. The investigated Foundation basic pattern was made by the allowing the maximum bust size without any surplus since it was based on the tight-fitted model drawing technique. The investigated the completed pattern was designed in three parts of front and back body, including bust. 2. The result showed by overlapping the torso basic pattern foundation and body surface development selected from body almost the same except for the shift of dart position. 3. The result by overlapping basic pattern 3 existing basic patterns. On the basis of top-bust line showed that the setting up the volume of dart of bust and its waist affect the appearance of model. Especially, it was found that the above result was related to the bust and under bust line. 4. The result of the wearing test of 3 existing basic patterns and basic pattern of this study revealed that the mean values of whole items were higher than average in type P and type E. The fitting & position of under-bust line and extent of wrapping bust showed the high points in the current study and type of P. The result of evaluating the whole appearance in three points(front, side, back) showed different according to the every basic foundation garment pattern.

• 한국멀티미디어학회논문지
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• 제17권3호
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• pp.393-404
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• 2014

본 연구는 전통건축 방식의 지붕곡을 전산학적으로 재해석하고 지붕가구부를 구성하는 부재들간의 기하학적 상관관계를 3D 데이터로 설계하기 위한 방안을 제시한다. 지붕곡을 형성하는 여러 개의 구성 요소, 즉 지붕가구부 부재들간의 상관관계를 전통건축 축조 방식에 근거하여 함수식으로 정의하고 분석된 데이터를 토대로 사용자가 원하는 지붕면을 구성하기 위한 각 부재들의 3차원 데이터 자동 생성 기법을 구현한다. 제안하는 방식은 부재간의 상관관계를 고려하여 지붕곡의 속성이 변경되면 지붕곡에 영향을 미치는 여러 개의 부재들이 자동으로 재설계되는 방식으로써 전통건축 설계의 효율을 높일 수 있다. 또한, 한옥의 다양한 지붕곡 설계를 보장하면서도 체계적인 설계와 규격화된 생산 및 가공을 가능하게 하여 한옥의 보급에 크게 기여할 수 있을 것으로 기대된다.

• 한국지리정보학회지
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• 제9권2호
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• pp.91-101
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• 2006

현재 문화재청과 지역 지자체는 NGIS 사업의 일환으로 문화재 수치지도 제작 사업을 완료하였다. 문화재 관리 GIS는 문화재 관련 공무원, 연구자들과 대규모 토목공사를 수행하는 관계자들이 문화재를 공사 계획단계에서 고려할 수 있도록 해 준다는 측면에서 필수적인 요소가 되었다. 현재 전국적으로 진행되는 폭발적인 국도 개발에 대비하여, 공사의 수행전 지표조사의 의무적 수행이 문화재 보호법에 의해 지정되었다. 본 연구에서는 최신의 IT기술인 CDMA 무선통신기술과 실시간 DGPS기술 그리고 C/S기반의 GIS 관리기술을 활용하여 모바일 기반의 유적 지표조사 시스템과 관제국의 C/S GIS 유적관리시스템을 개발하였다. 그리고, 본 연구에서 개발된 시스템을 활용하여 고고학 연구자들에 의한 문화재 수치지도 제작 관리 시스템 구축방안도 제시하였다.

• 대한조선학회 특별논문집
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• 대한조선학회 2006년도 특별논문집
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• pp.112-121
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• 2006

The vertical displacement of a ship on the basis of the sea level is an important parameter for its stability and control. To indicate the displacement on operating conditions, "draft marks" are carved on the hull of the ship in various ways. One of the methods is welding. The position, shape and size of the marks are specified on the shipbuilding rules by classification societies to be checked by shipbuilders. In most cases, high-skilled workers do the welding along the drawing for the marks and welding bead becomes the marks. But the inaccuracies due to human errors and high labor cost increase the needs for automating the work process of the draft marks. In the preceding work, an indoor robot was developed for automatic marking system on flat surfaces and the work proved that the robot welding was more effective and accurate than manual welding. However, many parts of the hull structure constructed at the outdoor are cowed shapes, which is beyond the capability of the robot developed for the indoor works on the flat surface. The marking on the curved steel surface requiring the 25m elevations is one of the main challenges to the conventional robots. In the present paper, the robot capable of climbing vertical curved steel surfaces and performing the welding at the marked position by effectively solving the problems mentioned earlier is presented.

• 한국정밀공학회지
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• 제23권5호
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• pp.143-148
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• 2006

It is still very difficult to generate a geometry model and finite element model, which has complex and many free surface, even though 3D CAD solutions are applied. Furthermore, in the medical field, which is a big growth area of recent years, there is no drawing. For these reasons, making a geometry model, which is used in finite element analysis, is very difficult. To resolve these problems and satisfy the requests of the need to create a 3D digital file for an object where none had existed before, new technologies are appeared recently. Among the recent technologies, there is a growing interest in the availability of fast, affordable optical range laser scanning. The development of 3D laser scan technology to obtain 3D point cloud data, made it possible to generate 3D model of complex object. To generate CAD and finite element model using point cloud data from 3D scanning, surface reconstruction applications have widely used. In the early stage, these applications have many difficulties, such as data handling, model creation time and so on. Recently developed point-based surface generation applications partly resolve these difficulties. However there are still many problems. In case of large and complex object scanning, generation of CAD and finite element model has a significant amount of working time and effort. Hence, we concerned developing a good direct finite element model generation method using point cloud's location coordinate value to save working time and obtain accurate finite element model.

• 패션비즈니스
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• 제20권4호
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• pp.153-171
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• 2016

With the advent of smart clothing for health care and sports, the sophisticated designs with curved seams are drawing attention. One of the problems in those clothing is to determine the design curves in 2D pattern, such that it corresponds to the lines on the intended 3D body. Moreover, the difficulty increases when the original pattern needs to be changed for various sizes and body types. We compare two methods of pattern enlargement in this paper: one is the offset/projection type, and the other is the split grading type. For the enlarged pattern with offset/projection type, the 3D surface offset was first adopted to transform the standard lower body to the target larger size; next, the design lines were projected to the new 3D surface, following which the 3D pattern was developed from the newly transformed 3D surface. In the second method, the enlarged pant patterns were developed by the split grading method. Here, a 3D pattern was developed from the initial body, and then enlarged to the target size by the conventional split grading method. Two feminine pants patterns were examined by 3D virtual fitting. We observed that the 3D offset/projection pants pattern was well fitted, having an evenly distributed surplus, as compared with the sample developed using the split grading method. The difference between the two patterns were apparent at the location where several curved lines merged.

• 보존과학회지
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• 제28권1호
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• pp.87-94
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• 2012

이 연구에서는 해운대 석각을 대상으로 3차원 레이저 스캐닝 시스템을 적용하여 디지털복원 및 표면심도 모델링을 수행하였다. 먼저 석각의 3차원 디지털복원은 광대역 및 정밀 스캐너를 이용하여 점군 데이터를 획득하였고, 정합, 병합, 필터링, 폴리곤 메쉬, 도면화 작업 순으로 진행하였다. 특히 정밀 스캐닝 폴리곤은 광대역 폴리곤에 비해 글자의 필획, 음각깊이 및 선명도 등이 매우 뛰어났다. 표면심도 모델링은 폴리곤 분리, 기준축 설정, 기준점 선정, 등고선도 맵핑 및 폴리곤 병합을 통해 완성하였으며, 사진과 폴리곤 이미지에 비해 글자의 상대적 음각깊이(5~17mm)와 윤곽이 매우 뚜렷하게 나타났다. 광대역 및 정밀 스캐닝을 병합한 디지털복원 기술을 통해 석각의 전체 형태와 미세형상을 신속하고 정확하게 복원하였고, 표면심도 모델링은 육안과 사진으로 불분명했던 부분을 가시적으로 표현해주었다. 앞으로 정기적인 모니터링을 통해 석각의 다양한 손상과 시간에 따른 주변 환경 변화를 수치적으로 분석할 수 있을 것으로 판단된다.

• 한국정밀공학회지
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• 제24권3호
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• pp.91-99
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• 2007

Fractures of galvannealed coating layer during actual press forming in automotive applications were observed by scanning electron microscopy in order to understand fracture mechanism. Fracture behaviors of galvannealed coating layer in extra deep drawing quality steels and high strength steels have been studied by performing the tests describing the representative plastic deformation in sheet metal forming such as uni-axial tensile test, compression test, bi-axial test and plane strain test. Growth and direction of cracks were deeply related to the plastic deformation modes and history. The material properties of galvannealed coating layer were investigated by nano-indentation test equipped with Berkovich diamond indentor for the specimens. Hardness and elastic modulus of the coating layer were higher than bared steels and that was the reason for crack of coating layer. Flat friction test and drawbead friction test were performed to observe the effect of the surface morphology on the frictional characteristics. The micro-plasto hydrodynamic lubrication were appeared and played an important role in reducing the coefficient of friction.

• 건축역사연구
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• 제20권4호
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• pp.115-134
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• 2011

International Competition for Parc de la Villette has evoked the old architectural question that is about the conflict between unchanging architecture and ever changing time. Tschumi and Koolhaas suggested well-known solutions for it, both of which had started from the criticism of general urban design approach that ignored changing factors in time. However, this study argues that the approaches of Tschumi and Koolhaas are even opposite to each other in spite of their common aims. Influenced by deconstructivists' theories, Tschumi tries to generate the 'text' on the surface of la Villette so that the different users of the park can read it differently. The text is built by 'superimposing' different systems such as points, lines, and surfaces. This study criticizes such formalistic approach since such 'forms' do not generate any dialogue with the real users but just stay as a backdrop for irrelevant events. Meanwhile, Koolhaas concentrates on the 'ground-ness' of la Villette. What he deals with is the real ground which embraces all the potentials on it already. His 'bands' express nothing but the metamorphosis of the ground, and the ground generates the 'differences' out of itself by repeating itself ceaselessly. This study tries to clarify all those happenings and meanings by intimate investigation of various drawing works for the la Villette project by Tschumi and Koolhaas.

• 대한기계학회논문집
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• 제15권6호
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• pp.1807-1818
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• 1991

본 연구에서는 자동차용 Zn-Ni계 합금 전기도금 강판(electro Zn-Ni alloy coated steel sheet, EGN)에서 도금층 중의 Ni함량에 따른 금층의 표면특성이 마찰거 동에 미치는 영향과 윤활유 종류에 따른 Ni 함량별 마찰특성을 파악하여 최적 스탬핑 조건을 도출하는데 기여하고자 한다.