• Proceedings of the Korean Reliability Society Conference
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• 2011.06a
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• pp.131-140
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• 2011

도로안전시설용 시선유도봉은 통상 도로에 설치되어 운전자의 시선을 유도하고 차선을 분리하는 용도로 사용된다. 이러한 시선유도봉은 주로 도로상에 설치되기 때문에 차량과 부딪히는 경우가 자주 발생하므로 제품의 내구성이 특히 요구된다. 종래의 시선유도봉에 대한 평가방법은 제품의 일부를 채취하여 재료의 기본 품질 성능만을 평가하였다. 그러나 현장의 도로관리를 담당하고 있는 수요기관에서는 빈번한 사고와 민원으로 인해 제품의 평가방법에 대한 문제 제기를 하였고, 완제품 상태로 신뢰성을 평가할 수 있는 방법 개발을 요구하였다. 따라서 본 연구에서는 시선유도봉의 주요 고장 요인이 되는 차량 충돌에 의한 재질 파손, 바퀴 압축에 의한 회복 불능, 제품 표면에 부착되는 반사시트의 박리 및 변색에 대한 고장 메커니즘 분석하고, 이러한 고장을 재현할 수 있는 신뢰성 평가법을 개발하고자 하였다. 주요 고장 메커니즘 분석을 위해 국내.외 평가 기준을 조사하였으며, 특히 미국 AASHTO's (American Association of State Highway and Transportaion Officials)의 NTPEP (National Transportation Products Evaluation Program)에서 수행하고 있는 내구성 평가 방법에 대한 사례 조사를 통해 국내 적용을 검토해 보았다. 또한 서울시설관리공단의 협조로 가장 주요한 고장의 요인으로 꼽히는 차량 충돌 시험을 올림픽대로 내 조각공원에서 실시하였다. 그 결과 시험실에서 고장을 재현할 수 있는 신뢰성 평가 장비 개발의 필요성이 부각되었으며, 차량 충돌과 바퀴 압축을 모사할 수 있는 신뢰성 평가 장비를 제작하였다. 시선유도봉의 신뢰성 평가는 기본적인 품질성능평가 이외에 신규로 개발된 충격시험(고온, 저온, 반사지)과 굴곡압축시험, 반사지와 재질의 내후성 시험을 실시하였다. 또한 국내 9개사(社) 10개 제품에 대한 신뢰성 비교평가를 실시한 결과, 제품의 내구성에 중요 척도가 되는 신뢰성 평가 기준을 설정할 수 있었고, 합리적인 제품의 가격 수준과 품질 수준에 대한 신뢰성 가이드를 제공할 수 있었다.

• The Journal of the Korea Contents Association
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• v.7 no.12
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• pp.1-12
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• 2007

In this study, the use of wrapping cloth was studied by examining documents and drawings from the past that reflect the life of people of the time with a focus on "minbo" (a wrapping cloth used by civilians) and "gungbo" (a wrapping cloth used by the ruling class). Unlike the bag culture of industrialized society, wrapping cloth has diversity, dynamic and receptiveness to changes as well as coexistence of 2 and 3-dimension. Environment-friendliness of recyclability of the cloth used for making wrapping cloth is not found in any other traditional transportation device cultures of the world. Such polysemous elements converge into a various functions with the development of technology and raw material and allow a package design from a new perspective. This study analyzes the above factors from a package design perspective to suggest an innovative modern package design that has fusional, diverse features.

• Journal of the Korean Geotechnical Society
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• v.20 no.2
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• pp.97-105
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• 2004

The purpose of this study is to provide the ways of recycling of by-product limes as lightweight fill, backfill materials, and lightweight blocks by performing experimental study. New lightweight fill materials and blocks were devised by mixing by-product lime, weathered granite soil, small pieces of waste EPS, and Portland cement. Physical, geotechnical, and environmental properties of the lightweight mixed soils and blocks were analysed by laboratory experiments for mixed samples manufactured with various mixing ratios. KMS tests were also performed to evaluate the concentration variation of the chemical components of the light weight blocks leachates. It is expected that this study will contribute to resolving the problem of by-product lime disposal as well as to recycling the by-product limes as fill materials and blocks.

• Journal of Digital Convergence
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• v.18 no.9
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• pp.351-356
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• 2020

This study is an introductory study on Convergence of Traditional Chinese Paper-cutting Art and Contemporary Ceramic Decoration. As a part of Chinese folk art, now newly developed by the convergence of contemporary ceramic ar, today it promotes artists' creativity and find a alternative way for ceramic art. This mainly explore transition of 2 dimentional paper-cutting art into ceramic art. As a part of convergence art, this study suggest combination of 4 elements yin-yang-true-false with understanding of its history and contemporary status, and towards aesthetic values.

• Korean Chemical Engineering Research
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• v.56 no.5
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• pp.761-766
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• 2018

Droplet-based microfluidic device has led to transformational new approaches in various applications including materials synthesis and high-throughput screening. However, efforts are required to enhance the production rate to industrial scale because of low production rate in a single droplet generator. In here, we present a method for enhancing production rate of monodisperse droplets via parallelization of flow-focusing generators. For this, we fabricated a three-dimensional monolithic elastomer device (3D MED) that has the 3D channel structures in a single layer, using a double-sided imprinting method. We demonstrated that the production rate of monodisperse droplet is increased by controlling the flow rate of continuous and dispersed phases in 3D MED with 8 droplet generators. Thus, we anticipate that this microfluidic system will be used in wide area including microparticle synthesis and screening system via encapsulation of various materials and cells in monodisperse droplets.

• Journal of the Korea Computer Graphics Society
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• v.6 no.4
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• pp.35-42
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• 2000

3D texture mapping generates highly natural visual effects in which objects appear carved from lumps of materials rather than laminated with thin sheets as in 2D texture mapping. Storing 3D texture images in a table for fast mapping computations, instead of evaluating procedures on the fly, however, has been considered impractical due to the extremely high memory requirement. Recently, a practical real-time 3D texture mapping technique was proposed in [11], where they attempt to resolve the potential texture memory problem by compressing 3D textures using a wavelet-based encoding method. In this paper, we consider two other encoding schemes that could also be applied to the compression-based 3D texture mapping. In particular, we extend the vector quantization and FXT1 for 3D texture compression, and compare their performance with the wavelet-based encoding scheme.

• Journal of Korean Ophthalmic Optics Society
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• v.13 no.4
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• pp.13-17
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• 2008

Purpose: Study the method to attach to traditional pattern for the demands of eyeglasses' function which is becoming extended to cultural psychological and social aspects. Methods: To understand the symbolic characteristic of traditional pattern, especially through using palmette, embroidery, and practicing it on glasses' temple and cleaner. Results: Globalization stimulates crossing-consumption cultural trend rapidly. Thus, new glasses pattern involving Korean ethnic feature is a new source that could well adapt to this tendency. This report presents new aspect which corresponds to the demand of modern consumers. By modernizing Traditional pattern and method, we could discover the cultural value of glasses design. Conclusions: Glasses imply social position of users and became a measure that reveal a part of style that presents modern psychological language. Thus, the glasses design using traditional pattern makes a chance to change the beauty sense from western style to oriental one. And it achieves the desire of cultural consumption through glasses design.

• The Journal of the Convergence on Culture Technology
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• v.5 no.1
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• pp.265-273
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• 2019

This research aims at developing human resources who will serve as flexible mediators in the future national or cultural conflict situations. The primary learning contents approach the class by selecting the upcycling design activities, in which the students recognize the problem of waste that is for all and study representative characteristics and backgrounds of each culture. The classes were held centering around the student members of GunpoYMCA, and the culturally characteristic materials were made through upcycling design. The activities included making giraffes in Africa with plastic bottles, Mongolian tents with wooden posts, snow globes with sauce pots, patchworks and rugs with shirts and textiles, and garlands with banners, which helped students learn the new term upcycling as well as get interested in the environmental problems. Also, they could understand other cultures by creating materials that represent each culture and studying their origins and historical backgrounds. In conclusion, this research offers value by developing abilities to cope with not only conflicts between cultures but confrontations between nations in the larger scope.

• The Journal of Korean Academy of Prosthodontics
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• v.46 no.4
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• pp.335-342
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• 2008

Purpose of study: To compare on bone formation between ovariectomized rats and normal rats after graft of alloplastic bone material. Material and methods: Twenty female rats were used in this study. They were divided into two groups by each ten rats. One group was ovariectomized and grafted alloplastic bone material. Other group was non-ovariectomized and grafted alloplastic bone material. After a healing time of 4 weeks, the animals were sacrificed and decalcified preparations were routinely processed for histologic evaluations. Results: Ovariectomy group was significantly lesser bone formation compared with non-ovariectomy group. Conclusions: Ovariectomy acts as a negative factor in new bone formation.

• Journal of Conservation Science
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• v.33 no.6
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• pp.443-456
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• 2017

The Geumran-gasa (Kasaya) and Jangsam of the monk Samyeong are historical relics and were designated as object No.29, a Buddhist costume of the Joseon Dynasty, by the National Folklore Cultural Heritage, in 1973. In 1984, after being treated for the purposes of washing and preserving the shape of the garments, the object was kept in the Temple Museum of Pyochungsa, as their holding institution. However, regular inspection conducted by the Cultural Heritage Administration in 2013 determined the need for a re-treatment. The Geumran-gasa had been originally made with 25 strips, but it had been separated into two parts and many pieces were lost. A part of the collar in the Jangsam was lost as well. Therefore, both relics needed to be restored. The re-treatment process involved pre-investigation, washing, reinforcement fabric dyeing, restoration, and fumigation. In particular, we focused on reinforcing the damaged parts and restoring the missing parts by applying advanced materials and methods in order to restore the original form as much as possible. This conservation is the result of the re-treatment of the cultural properties by replacing the old material used in past treatments and applying advanced methods under the basic principle of reversibility in conservation treatment.