• 한국의상디자인학회지
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• 제18권3호
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• pp.245-260
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• 2016

This study explored cases of 3D printing utilization in domestic and overseas fashion industries, and presented utilization strategies for fashion design departments in universities in future by grasping characteristics of newly appearing distribution types through 3D printing. Cases of producing costumes using 3D printing in fashion industry comprised a bikini using the material of Nylon12 that continuum fashion demonstrated, innovative 3D costumes by Iris Van Herpen, Tweed Suit using the material that Chanel manufactured with 3D printing technology, but they were limited to experimental fashion works due to limitations of 3D printer material and printing size. On the other hand, in fashion accessories, with jewelry and shoes at the head of the list, MCM and Kipling also demonstrated bags using this technology, and Elvis Pompilio and Gabriela Ligenza demonstrated 3D printing hat products as well. Except the above, as in glasses and neckties utilizing 3D printing, owing to reduced limitations of time, size and material, 3D printing was found to be utilized in fashion accessories other than costumes. Recently there has been a new consumption and distribution structure coming up focusing on 3D printing technology. That is, in overseas countries, content platforms sharing products modeled by oneself has rapidly appeared, and in our country as well, funnypoly, a 3D content platform appeared in 2015. The appearance of these new types of distribution structures means that the common people can produce design contents, and we believe that it may bring about a change in the traditional way of distribution structure. To walk in step with this change, it is believed that it is necessary for fashion design departments to raise college faculty members who can educate 3D printing, develop curriculum to educate 3D printing, and develop experiential programs connected with middle and high schools.

• 조형예술학연구
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• 제11권
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• pp.79-108
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• 2007

"Printing is an Art of reproduction & a Technique of However printing has extended its limitation from a genre of reproduction itself and now it stands on the turning point as an art such as painting or sculpture which expresses artist's originality. Early Printing has had relations in depth with press printing in terms of information recording, preservation, and transmission. It was acknowledged value in a way of information satisfaction different from how it is valued as a pure art today. But, later printing has transferred its function from a mean of reproduction to pure art due to the development of printing skills and photography invention. It can be said that the concept of modern printing is taking over its genealogy as a creative work not as just printing. Also its expression capability is widen to dimensional printing and high-tech multimedia from original tradition techniques. As we discussed above, modern painting is very open to various changes. This modern painting aspect can be seen as an extended interpretation of 'board' concept. This dissertation raises a question why monotype and monoprint couldn't secure its position in printing history in spite of numerous artists' tryouts in its way. Monotype and monoprint fundamentally based on intaglio technique in its history. Yet, its systematic study hasn't been worked out. This is because of the lack of recognition of monotype and monoprint's originality as printing. Especially in monoprint, it has known as an early stage in copperplate printing process which is an attempt to solve the technique limitation or trial work for edition. Likewise the reason why monotype and monoprint remains at the edge of printing border ambiguously is because of conceptual, technical characteristics which are against traditional printing. In traditional printing, the concept of board is important as a method of reproduction. Different from the fact, monotype and monoprint accept the form of medium 'board' conceptually out of limited condition as mentioned. Thus monotype and monoprint hasn't stand out for several reasons until late 20th century when it started come out to public as people starts to have interests that works from famous artists are actually based on monotype and monoprint. This dissertation likes to step into the monotype and monoprint theoretically which is not well known in domestic and try to study the meaning of monotype and monoprint as a printing medium which is also hasn't been considered sincerely. For this study the process follow as below. First, look into how monotype and monoprint has a concept and history. Next, check differences through comparison with traditional printing and how printing can be understood in what aspects at the same time. After, verify how monotype and monoprint have influence on the acceptance of extended concept of 'board'. This study will show the expressional possibility of monotype and monoprint which has already known as 'tableau printing' in today's situation where adventurous experiments of printing medium are going on with the development of technology.

• 한국정밀공학회지
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• 제30권6호
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• pp.578-583
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• 2013

The lighting devices using organic light emitting diodes (OLEDs) are actively researched because of the various advantages such as high power efficiency and 2-dimensitonal lighting emitting. To commercialize those OLED lighting devices, the manufacturing cost must be downed to comparable price with conventional light sources. Here, we demonstrate a reverse gravure-offset or gravure off-set printed metal electrode for the auxiliary electrode for OLED lighting devices. For the fabricated OLED's auxiliary electrode, we used Ag nano-paste and printed metal grid structure with a line width and spacing of several ten and hundred micrometer by using gravure-offset printing. In the end the printing metal grid pattern are successfully achieved by optimization of various experimental conditions such as printing pressure, printing speed and printing delay time.

• Journal of Information Processing Systems
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• 제15권6호
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• pp.1277-1295
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• 2019

With its technical development, digital printing is being universally introduced to the mass production of clothing factories. At the same time, many fashion platforms have been made for customers' participation using digital printing, and a tool is provided in platforms for customers to make designs. However, there is no sufficient solution in the production stage for automatically converting a customer's design into a file before printing other than designating a square area for the pattern designed by the customer. That is, if 30 different designs come in from customers for one shirt, designers have to do the work of reproducing the design on the clothing pattern in the same location and in the same angle, and this work requires a great deal of manpower. Therefore, it is necessary to develop a technology which can let the customer make the design and, at the same time, reflect it in the clothing pattern. This is defined in relation to the existing clothing pattern with digital printing. This study yields a clothing pattern for digital printing which reflects a customer's design in real time by matching the diagram area where a customer designs on a given clothing model and the area where a standard pattern reflects the customer's actual design information. Designers can substitute the complex mapping operation of programmers with a simple area-matching operation. As there is no limit to clothing designs, the variousfashion design creations of designers and the diverse customizing demands of customers can be satisfied at low cost with high efficiency. This is not restricted to T-shirts or eco-bags but can be applied to all woven wear, including men's, women's, and children's clothing, except knitwear.

• 대한전자공학회논문지SD
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• 제47권2호
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• pp.7-14
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• 2010

본 논문에서는 금속 전극을 미세접촉인쇄방식으로 Ag ink를 이용하여 제작하는데 있어서 접착속도, 분리속도, 접촉시간의 세 가지의 동역학적 파라미터가 잉크 전이율에 미치는 영향을 분석하여 최적의 공정조건을 도출하였다. 잉킹공정에서는 접촉속도는 1 mm/s 이하, 접촉 후 유지시간은 짧게 하며, 분리속도는 1000 mm/s로 빠르게 해야 잉크의 전이율이 98%이상 높았다. 프린팅 공정에서는 반대로 접촉속도는 100mm/s 이상의 빠르게, 접촉 후 유지시간은 30초 이상, 분리속도는 1mm/s 이하로 느리게 할 때 최고의 인쇄특성을 보였다. 이를 이용해 전체 $5cm{\times}5cm$ 면적에 최소 선폭 $30{\mu}m$, 두께는 300~500nm, 50nm이하의 약 $15{\sim}16{\mu\Omega\cdot}cm$ 비저항을 가지는 전극을 인쇄하였다.

• 자연과학논문집
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• 제11권1호
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• pp.151-157
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• 1999

승화성이 우수한 분산염료를 사용하여 면포에 대한 열 전사 염색성의 최적조건을 알아보기 위하여 온도, 시간, 농도에 따른 전사 염색에 대하여 연구하였다. 이 최적조건에 따라 팽윤제를 첨가한 후의 열 전사 염색성과 전 처리된 면포의 열 전사 염색성 및 분자량에 따른 열 전사 염색성을 검토하였으며, 세탁견뢰도와 일광견뢰도를 측정하여 열 전사날염에 대한 염색견뢰도를 측정하였다. 분산염료를 사용하여 면포에 대한 열 전사날염의 최적조건은 염료용액의 농도는 5%로, 처리온도가 $200^{\circ}C$, 처리시간은 3분에서 열 전사 염색성이 우수하였다. 면포에 대한 전처리의 시간이 길어질수록 열 전사 염색성이 향상되었으며, 팽윤제로는 Glycerin이 우수하였고, 혼합처리보다는 전처리가 열 전사 염색성이 우수하였다. 분자량에 따른 열 전사 염색성은 혼합처리의 경우 분자량이 작을수록 열 전사 염색성이 향상되었으며, 분자량이 커짐에 따라 열 전사 염색성이 나빠짐을 나타내었다. 그러나 전처리의 경우는 분자량에 큰 영향을 받지 않음을 나타내었다. 열 전사 날염된 면포의 세탁견뢰도는 염료의 분자량이 작은 것이 우수하였고, 일광견뢰도는 염료의 분자량이 큰 것이 보다 우수한 견뢰성을 나타내었다.

• 대한방사선기술학회지:방사선기술과학
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• 제43권3호
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• pp.169-176
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• 2020

Interventional radiology is performed under real-time fluoroscopy, and patients are exposed to a wide range of exposures for a long period of time depending on the examination and procedure. However, studies on radiation protection for patients during an intervention are insufficient. This study aims to evaluate the doses exposed during the intervention and the applicability of 3D printing materials. The organ dose for each intervention site was evaluated using a monte carlo simulatio. Also, the dose reduction effect of the critical organs was calculated when using a shielding device using 3D printing materials. As a result, the organ dose distribution for each intervention site showed a lower dose distribution for organs located far from the x-ray tube. It was analyzed that the influence of scattered rays was higher in the superficial organs of the back of the human body where x-rays were incident. The dose reduction effect on the critical organ using the 3D printing shield showed the highest testis among the gonads, and in the case of other organs, the dose reduction effect gradually decreased in the order of the eye, thyroid, breast, and ovary. Accordingly, it is judged that the 3D printed shield will be sufficiently usable as a shielding device for the radiation protection of critical organs.

• 산업경영시스템학회지
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• 제45권3호
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• pp.66-77
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• 2022

Digitization and automation technologies have rapidly maximized productivity and efficiency in all industries over the past few decades. Construction automation technology has either stagnated over the same period or has not kept pace with overall economic productivity. According to the research studies up to now, the output of concrete structures using coarse aggregates (8mm or more) is very limited due to the limitations of equipment and materials. In this study, information on the development process of 3DCP equipment that can print concrete structures with the printing width (100 mm or more) and printing thickness (30 mm or more) using a 3DCP material mixed with coarse aggregate (8 mm or more) is provided. To verify the performance of the developed 3DCP equipment, experimental data are provided on output variables, the number of layers, and the inter-layer printing time interval. The evaluation and verification data of various mechanical properties (compressive and splitting tensile strength) of printed materials using coarse aggregates are provided.

• 한국구조물진단유지관리공학회 논문집
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• 제25권6호
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• pp.199-208
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• 2021

3D 프린팅 콘크리트의 출력성능 및 부재 강도는 물시멘트비(Water cement ratio, W/C)와 레이어의 프린팅 시간 간격(Printing Time Gap, PTG)에 의하여 큰 영향을 받을 수 있다. 이 연구에서는 W/C와 PTG를 변수로 하여 제작된 프린팅실험체와 몰드 실험체의 표면수분량과 전단부착강도와의 관계를 측정·고찰하였으며, 그 결과, 레이어표면수분량이 전단부착강도에 큰 영향을 주는 것으로 나타났다. 따라서, 3D 프린팅 출력 시 요구되는 레이어 계면 전단부착성능을 확보하기 위해서는 PTG에 따라 적절한 레이어표면수분량이 유지될 수 있도록 유의해야 하며, 레이어표면수분량에 영향을 줄 수 있는 여러 가지 프린팅 환경인자들 대한 후속 연구도 필요할 것으로 판단된다.

• 산업경영시스템학회지
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• 제44권4호
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• pp.32-42
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• 2021

The printing process can have to print various colors with a limited capacity of printing facility such as ink containers that are needed cleaning to change color. In each container, cleaning time exists to assign corresponding inks, and it is considered as the setup cost required to reduce the increasing productivity. The existing manual method, which is based on the worker's experience or intuition, is difficult to respond to the diversification of color requirements, mathematical modeling and algorithms are suggested for efficient scheduling. In this study, we propose a new type of scheduling problem for the printing process. First, we suggest a mathematical model that optimizes the color assignment and scheduling. Although the suggested model guarantees global optimality, it needs a lot of computational time to solve. Thus, we decompose the original problem into sequencing orders and allocating ink problems. An approximate function is used to compute the job scheduling, and local search heuristic based on 2-opt algorithm is suggested for reducing computational time. In order to verify the effectiveness of our method, we compared the algorithms' performance. The results show that the suggested decomposition structure can find acceptable solutions within a reasonable time. Also, we present schematized results for field application.