• 한국재료학회:학술대회논문집
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• 한국재료학회 1998년도 IUMRS-ICEM ABSTRACT BOOK
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• pp.98.1-98
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• 1998

• 융합신호처리학회 학술대회논문집
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• 한국신호처리시스템학회 2003년도 하계학술대회 논문집
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• pp.268-271
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• 2003

There are several methods for the design of 2D filter. Notable among them is McClellan transform method. This transform allows us to obtain a high order 2D FIR filter through mapping the 1D frequency points of a 1D prototype FIR filter onto 2D frequency contours. We design 2D filter using this transform. Then we notice for mapping deviation of the 2D filter. In this paper, Quadratic programming (QP) method allows us to obtain coefficients of McClellan transform. Then we compare deviation of QP method with least-squares(LS) method. Elliptic filter is used for comparison. The optimal cutoff frequencies of a 1D filter are obtained directly from the QP method. Also several problem of LS method are solved.

• 패션비즈니스
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• 제27권6호
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• pp.1-17
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• 2023

This study aimed to develop a modern textile design based on the formability of Frank Stella's paintings and to develop and present a fashion design that combines modern sensibility as a 3D virtual clothing program. The formative characteristics of Frank Stella's work were 'unity due to regular stripes', 'asymmetry due to geometric surface division', and 'decorabilitydue to colorful use'. Based on this, costume patterns and textiles based on Frank Stella's paintings were developed and six 3D virtual fashion design works were produced. The conclusion was as follows. First, it was confirmed that Frank Stella's work has a very wide range of applications to fashion products as abstract expression and minimal simplicity coexist visually. Second, various colors and forms of Frank Stella's paintings could be developed using textiles with visual formability, and originality as a fashion work applied with paintings could be maximized. Third, the development of 3D fashion using virtual programs had the ease of time efficiency, cost reduction, and spatiotemporal expansion of work processing compared to the actual costume production process. In addition, the simulation of 3D virtual wear made it easy to modify and recover the position of the textile to be applied to the costume and create a new design in the process of transforming the position of various textiles. It is expected that this study results will be used as basic data for the future conversion content industry in the painting and fashion industries.

• 한국전자파학회논문지
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• 제25권6호
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• pp.628-636
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• 2014

본 논문은 재밍 대응 위성 항법 장치의 5소자 평면 배열 안테나 설계에 대해 기술한다. GPS $L_1/L_2$ 대역에서 공진하는 적층 구조의 패치 안테나 설계를 제안한다. 제안된 안테나는 광대역 및 원형 편파 특성을 구현하기 위해 칩 커플러를 이용한 이중 급전을 사용한다. 배열안테나 측정 결과, 중앙안테나의 전면 방향 이득은 $L_1$과 $L_2$ 대역에서 각각 1.10 dBic, 0.37 dBic, 측면안테나는 $L_1$과 $L_2$ 대역에서 0.99 dBic, -0.57 dBic를 갖는다. 고각 $30^{\circ}$에서 방위각의 이득은 중앙안테나 $L_1$과 $L_2$ 대역에서 평균 -2.08 dBic, -5.33 dBic의 측정 결과를 갖는다. 측면안테나는 $L_1$과 $L_2$ 대역에서 평균 -0.40 dBic, -2.09 dBic의 측정 결과를 갖는다. 제안된 5소자 평면 배열 안테나는 GPS 재밍 대응 장치에 적합함을 확인한다.

• 복식문화연구
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• 제31권1호
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• pp.124-140
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• 2023

This study analyzes traditional women's Hu costumes of the Tang dynasty, and deploys a creative fashion design to converge contemporary and traditional styles. In this costume, women wear a robe with striped or plain patterns in the lower part of the pants, and it appears frequently in red and yellow colors. Depending on the sleeve, it is either a round collar or a turn down collar robe. In the Hu hat, the huntuomao and juanyanxumao were leather and mili and weimao were used to prevent the sand from flowing. This study uses the CLO 3D program with the "moment" theme based on the Hu costume for women to deploy 4 pairs of fashion design and to produce works for 2 pairs. The 3D virtual clothing program demonstrates important effects in design deployment and pattern arrangement through its efficiency and convenience of clothing production. The CLO 3D program was closely combined with the 2D design and the 3D affect, and it heightened the efficiency in saving the processing time and energy of the sample clothes. Through facilitating the 3D digital fashion design, the production may reduce time needed and contribute to an effective economy, and it may compare digital fashion design to actual products as well as illustrate the potential of digital fashion design.

• 한국CDE학회논문집
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• 제11권6호
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• pp.393-402
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• 2006

The purpose of this study is to develop mechanisms of nD model-based design by the combination of 2D drawing standards and 3D building models from the current 2D and text-based design. The aim of this study can be archived by defining the 2D model extension definitions for the IFC model development and harmonizing existing 2D standards. The paper examines 1) 3D Representation of Building Element and Building Services element, and 2D Model extension of IFC2X.2, 2) Basic development of additional 2D element that should be added to IFC model, and 3) mapping method between current 2D standard and IFC2.X2. Following this approach, the interoperability problem between 3D model and 2D drawing can be solved and finally an extended data model could be developed.

• Journal of Ship and Ocean Technology
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• 제12권3호
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• pp.1-13
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• 2008

In shipbuilding, diverse manufacturing techniques for automation have been developed and used in practice. Among them, however, the hull forming automation is the one that has not been of major concern compared with others such as welding and cutting. The basis of the development of this process is to find out how to extract thermal forming information. There exist various methods to obtain such information and the 3D design shape that needs to be formed should be extracted first for getting the necessary thermal forming information. Except well-established shipyards which operate 3D design systems, most of the shipyards only rely on 2.5D design systems and do not have an easy way to obtain 3D surface design data. So in this study, various shipbuilding design systems used by shipyards are investigated and a 3D design surface data extraction method is proposed from those design systems. Then an example is presented to show the extraction of real 3D surface data using the proposed method and computation of thermal forming information using the data.

• 한국의상디자인학회지
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• 제26권1호
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• pp.17-31
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• 2024

The purpose of this study is to propose a modern use of traditional culture by developing creative fashion designs that combine modern and traditional styles based on an analysis of traditional costumes of women in the Tang Dynasty of China. The characteristics of the Tang Dynasty women's costume are as follows. The Tang Dynasty women's costume consists of a short coat (衫, Shan), skirt (裙, Qun), half-arm shawl (半臂, Banbi), and short embroidered cape (帔, Pei). The colors are succinct and elegant, commonly red, yellow, green and navy blue in its entirety. It may be classified by pattern that blend plant patterns, animal patterns, geometric patterns, and two or more mixed patterns. On the basis of the characteristics for traditional women's costume during the Tang Dynasty, the CLO 3D program is employed to develop digital fashion design for four pairs of 3D digital clothing and the production of two pairs of work product. The results are as follows. First, the development of fashion design reflecting the design characteristics of traditional women's clothing in the Tang Dynasty of China could be expressed as fashion design reflecting unique values while connecting tradition and modernity. Second, the 3D virtual clothing program displays an extremely important effect in design deployment and pattern arrangement by having efficiency and convenience in clothing production. The CLO 3D program is closely combined with the 2D design and 3D effect and heightened efficiency while being appropriate to realize sustainability while saving processing time and energy for the sample products. Third, the production of an actual product by facilitating the 3D virtual clothing design may lead to time savings and an effective economy and may allow for the comparison of digital fashion design and actual products as well as confirming the effects of digital fashion design.

• 한국융합학회논문지
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• 제1권1호
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• pp.69-75
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• 2010

영상매체를 이용한 영어 교육은 단순히 청각만을 이용한 방법보다 피교육생에게 사실적인 발음표현과 콘텐츠 몰입감 증대등의 측면에서 중요성이 높아지고 있다. 영어교육 콘텐츠에 등장하는 캐릭터들은 음성에 영어 발음에 맞추어진 사실적인 입모양을 표현키 위하여 많은 노력을 들이 있다. 이 논문에서는 교사가 손쉽게 영상 콘텐츠를 제작할 수 있도록 도와줄, 대화구문기반 교육용 콘텐츠 저작시스템을 이용하는 사용자에게 사실적인 lip-sync 애니메이션을 제작할 수 있도록 하여 교육의 능률을 높일 수 있도록 3D 캐릭터를 사례로 제작하였다. 폼 노아 마우스 차트를 활용한 입모양과 발음의 연관구조를 분석하고, 캐릭터의 컨셉 디자인에서 모델링, 맵핑, 애니메이팅 과정을 거쳐 익스포트로 최적화된 캐릭터데이터를 추출해 보았다. 입모양과 연계되는 손동작, 몸동작도 추후 연구에서 다루어질 때 보다 효율적인 교육용콘텐츠를 위한 3D캐릭터 제작이 될 것으로 사료된다.

• 한국CDE학회논문집
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• 제12권1호
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• pp.39-49
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• 2007

Recently three-dimensional (3-D) die design and production process has been widely introduced into the tooling shops of automotive manufacturers to reduce time-to-production of brand-new automobiles. 3-D solid models created in CAD systems are used not only for various simulations for design verification, but also for NC tool path generation to machine dies and their Styrofoam patterns. However, a lot of time and cost will be required to build solid models for dies if designers use only the generalized modeling capabilities of commercial 3-D CAD systems. To solve this problem, it is necessary to customize 3-D CAD system for the specific die design and manufacturing process. This paper describes a dedicated 3-D CAD system based on Unigraphics for die design for automotive body panels. The system provides not only 3-D design capabilities, but also standard part libraries, to enhance design productivity. The design process modeling technology has been introduced to facilitate redesign of the die for the modified panel. By introducing this system, dies can be designed more rapidly in the 3-D space, and their solid data can be directly transferred to CAM tools for NC tool path generation and simulation tools for virtual manufacturing.