• Science of Emotion and Sensibility
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• v.14 no.1
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• pp.39-48
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• 2011

There still is a limitation in the usage of 3D clothes model in the production line due to the lack of compatibility between 3D modeling software, and its accurate 2D pattern making software, especially for free formed dress with tight fitted zone and draped part. In this study, obstacles in the 3D direct dress design process was overcome by solving the compatibility among each step of 3D virtual design process as well as adopting 3D-2D direct pattern development program called 2C-AN. Efficacy of making 2D pattern from 3D dress design using 2C-AN program developed by the authors was examined during the course of actual dress making process. Accurate ease over the fitted dress part was examined by 3D scanning technology, and the actual appearance of the draped part was compared with the simulation image of dress model. It was confirmed that the entire 3D design process and direct 2D pattern development proposed in this study was accurate enough to use in the 3D design process.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.123-130
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• 2007

본 논문에서는 기존 패턴캐드시스템 및 드레이핑시스템을 이용한 의복제작과정의 한계점과 개선가능성에 대해 알아보고, 이를 기반으로 새로 디자인한 의복제작시스템을 소개한다. 이 시스템은 원피스, 바지, 셔츠, 재킷 등 옷의 큰 스타일인 의복템플릿으로부터 의복디자인을 시작 한다. 소매, 카라, 포켓, 넥라인과 같은 템플릿 디테일들은 디자이너가 마음대로 다른 세부 템플릿들과 교체할 수 있으며, 세부 템플릿으로 커버할 수 없는 디테일한 수정은 3D 드레이핑 시스템과 2D패턴에디터에서의 직관적인 오퍼레이션을 통해 이루어진다.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.9
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• pp.1285-1291
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• 2013

In this paper, a double circular ring monopole antenna for wideband applications is designed and fabricated. The proposed antenna is based on a planar monopole design, and composed of double circular ring of radiating patches and ground plane to obtain the wideband characteristics. To get the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS) and found the parameters that effect antenna characteristics. Using the obtained parameters, the proposed antenna is fabricated. The fabricated antenna is measured at the operating frequencies, and the return loss coefficient, gain, and radiation patterns are determined. The results of measurement, -10dB impedance bandwidth, measured return loss is 4,530 MHz(2,510-7,040 MHz) and antenna peak and average gains for the frequencies are obtained 0.71~3.38 dBi, -3.85~0.3 dBi, respectively. In case of radiation patterns, the proposed antenna displays nearly omnidirectional radiation characteristics in the E-plane, and monopole-like radiation pattern characteristics in the H-plane.

• Proceedings of the KAIS Fall Conference
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• 2002.05a
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• pp.67-69
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• 2002

주얼리 제품에서 마스터패턴 제작비는 최종제품의 20% 정도로 전체 주얼리제품 시장에서 매우 큰 비중을 차지한다. 기존 주얼리 제품을 제작하는 일반 공정인 ‘디자인 시안→상세도면 제작→1왁스형 제작→석고 플라스크 제작→은 마스터패턴의 제작→왁스패턴의 대량생산→정밀주조→최종제품’의 복잡한 단계를 ‘CAD 디자인 시안→쾌속조형기 듀라폼 음각몰드 제작→저융점 합금으로 마스터패턴 제작→정밀주조→최종제품’의 공정으로 단순화하면서도 대폭시간을 단축할 수 있는 신공정을 제안하였다. 주요공정인 selective laster sintering (SLS)형 쾌속조형기(rapid prototype: RP)를 이용해서 분해온도가 190℃인 듀라폼 분말로 미리 3D CAD로 설계한 직경 20mm의 구, 링 요소를 각각 상하형의 합체형 몰드와 일체형 몰드로 제작하였다. 제작된 몰드에 융점이 70℃인 Pb-Sn-Bi-Cd 저융점 합금을 주입하여 마스터패턴을 제조하였다. 완성된 마스터패턴은 목표형상에 비해 치수 변형율이 2% 이내로 우수하고 주입공정 및 후가공공정이 용이하여 주얼리용 마스터패턴으로 응용이 가능하였다.

• Journal of the Korea Knowledge Information Technology Society
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• v.12 no.4
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• pp.539-550
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• 2017

In this paper, we designed, fabricated and tested an UHF band cylindrical dipole array antenna. In the proposed antenna, cylindrical dipoles were vertically arranged in four stages. A parallel structure feeding circuit was installed inside the cylindrical dipole and mounted so as to be broadband matching. The feeding circuit was installed at the center of the cylindrical dipole to optimize the gain flatness characteristic of the azimuth direction omnidirectional radiation pattern. Minimizing the difference between the signals branched from the feeding circuit and realizing the symmetry of the radiation pattern. The required specifications are more than 11.2% bandwidth in UHF band, above 6dBi antenna gain, standing wave ratio of 2:1 or less, less than ${\pm}1dB$ gain flatness in azimuth radiation pattern, more than 13 degrees in elevation radiation pattern of 3dB beamwidth. We confirmed the possibility of implementation through M&S and verified the result of M&S through production and testing. The test results are 11.2% bandwidth in the UHF band, 6.30 to 8.31 dBi gain, 1.53:1 standing wave ratio or less, within ${\pm}0.2dB$ gain flatness in the azimuth radiation pattern, elevation radiation pattern of 3dB beam width was 15.62 to 15.84 degrees. The test result meets all requirements specifications.

• Proceedings of the Korean Society of Computer Information Conference
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• 2013.01a
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• pp.103-106
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• 2013

3D LCD Module은 기존 TFT-LCD에 Parallax Barrier 방식과 Passive Glasses 방식 및 Active Glass 방식의 기술을 적합하여 만들어 진다. 현재는 3D Module 제작 후 기타 ASSY 장치를 부착 하여 시제품 출시 전에 3D 패턴을 기반으로 출하 검사를 통해 제품 이상 유무를 검사하다 보니 제품 출하 검사 시 불량 요인으로 불량 제품에 대한 모든 Repair공정을 위해 많은 시간 및 인력, 자재 등의 많은 로스 부분이 발생 하여 생산성 절감 및 제품 원가 상승의 요인이 발생 한다. 따라서 본 논문에서 제안하고자 하는 내용은 기존의 2D TFT-LCD Module 검사장비에 3D Pattern 및 동영상을 구현하여 보다 신속 하고 정확한 임베디드 환경을 이용한 2D 및 3D LCD Module용 검사 시스템을 개발 하는데 있다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.4
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• pp.611-619
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• 2008

2.5D Mapping system that embody in this paper can make new design by doing draping to live various texture and model picture image of fashion clothes by pattern, and can confirm clothes work to simulation without producing direction sample or product directly. Also, the system can support function that can forecast fabric design and state of end article exactly, and the system can bring competitive power elevation of fashion industry and cost-cutting effect by doing draping using database of fabric and model picture image. 2.5D Mapping system composed and embodied by mesh warp algorithm module, light and shade extraction and application module, mapping path extraction module, mesh creation and transformation module, and 2.5D mapping module for more natural draping. Future work plans to study 3D fashion design system that graft together 3D clothes technology and 3D human body embodiment technology to do based on embodiment technology of 2.5D mapping system and overcomes expression limit of 2.5D mapping technology.

• Journal of Fashion Business
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• v.25 no.3
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• pp.71-89
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• 2021

The purpose of this study was to design posture braces for rounded shoulders by examining characteristics of incorrect postures of rounded shoulders. The review of information in literature on rounded shoulder postures, correction exercise methods, and posture correction devices, has prompted this study to determine the design and material of a proper posture brace for rounded shoulders. In order to develop the pattern of a posture brace for rounded shoulders for women, the study carried out a comfort evaluation of the braces based on the 2D patterns through drafting method by utilizing the body measurements and relational formulae associated with the major body measurement such as bust circumference and on the 3D patterns of the brace which were obtained from 3D human model of women in their early 20s in Korea. Differences in angles were noted when 2D and 3D patterns of shoulder posture braces were compared. The side neck point was relocated farther outside in the 3D pattern to allow additional flexibility in the back-neck area, and the shoulder band was lowered by 14.8°, increasing armhole area comfort. The upper hemline of the front panel was found to rotate upward at an angle of 22.0° as the underarm point of the 3D pattern moved upwards than the underarm point of the 2D pattern, which enhanced comfort in the abdomen area. The 3D designs of shoulder posture brace was preferred in this study, as they significantly improved comfort while conducting fit evaluation compared to the 2D patterns of shoulder posture brace.

• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.5
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• pp.549-556
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• 2015

In this paper, design and fabrication for inset fed microstrip patch antennas applied to the $3{\times}3$ array CSLR and eight CSLR, respectively, to the ground plane are studied. The theoretical results are compared to the experimental results for the return loss and radiation pattern. For 'CSLR 09' antenna, the theoretical result for the resonant frequency and the return loss are 2.82 GHz and - 25.35 dB, respectively. The experimental results are obtained for a 2.885 GHz, -30.72 dB. Theoretical results for the resonant frequency and the return loss of the 'CSLR 08' antenna are 2.82 GHz, -16.77 dB, respectively, and the experimental results are obtained for a 2.885 GHz, -14.90 dB. In addition, E-plane and H-plane radiation patterns in comparison with designed and fabricated antennas are in good agreement.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.5
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• pp.337-343
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• 2013

In this paper, IEEE 802.11 based WLAN(5.2/5.8GHz) wideband Weathercock-shaped microstrip patch antenna was designed and manufactured. The antenna has a size of $17.4{\times}17.4mm^2$ and utilized FR-4 board. The size was minimized for mobility, and Weathercock-shaped U-slot and short-pin was inserted to satisfy adequate bandwidth and double bandwidth resonance characteristics. In addition, the antenna incorporated single both-sided patch, and simulation design optimized the Weathercock-shaped, position of the U-slot and the short-pin, and the length of the patch for the measurement. The manufactured antenna achieved a bandwidth of 695MHz from 5.2~5.8GHz zone(Return loss<-10dB). Achieved a beam width of $81.13^{\circ}$ and $85.43^{\circ}$ for 3-dB beam width of H plane and E p;ane radiation pattern, there was 3.17~4.85dBi gain.