• Proceedings of the Korean Fiber Society Conference
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• 2001.10a
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• pp.139-142
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• 2001

섬유강화 복합재료는 상대적으로 아주 높은 질량 대비 탄성계수를 가지고 있으므로 경량화 할 필요가 있는 물체나 관성력이 최소로 요구되는 부분에 사용되고 있다. 대부분의 복합재료판들은 고탄성-저신도 섬유를 사용하여 만든 단층의 복합재료를 그배향 방향을 조절하여 원하는 방향 특성으로 접근한다. 그러나 다층으로 만들어 2차원의 등방성 소재로 만들어 사용하고 있다. 그러나 이러한 경우에는 여러 층을 결합 하여야 하는 번거로움과 두께의 제약 등이 있다. (중략)

• Journal of the Korea Society for Simulation
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• v.6 no.1
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• pp.1-13
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• 1997

In this paper, we present a partitioning algorithm for distributed simulation of DEVS (Discrete Event System Specification) models. To preserve concurrency inherent in models, the proposed algorithm utilizes the structural information of models. Through benchmark simulation experiments, we show that the proposed algorithm can generate good partitions.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10b
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• pp.481-483
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• 2000

영상 기반 모델링 및 렌더링을 위해 제안된 LDI(Layered Depth Images) 기법은 여러 장의 2차원 영상과 깊이 정보, 카메라 정보를 입력으로 받아 3차원 와핑을 이용해 새로운 장면을 렌더링한다. 하지만 이 기법은 홀 발생 문제 등 몇가지 결함을 가지고 있다. 본 논문은 이러한 LDI의 문제를 해결하고자, 의료 영상 가시화 분야에서 널리 사용되는 쉬어-왑 렌더링 알고리즘을 사용한 결과를 설명한다. 한편, 본 논문에서 제안된 알고리즘은 적은 데이터를 필요로 하는데, 웹 상에서 오브젝트 플레이어 플러그인으로 개발한 결과 좋은 성능을 보였다.

• Journal of the Korean Society of Costume
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• v.50 no.7
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• pp.129-139
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• 2000

The Chonmachong (Tumulus No. 155 in Whangnam-dong, Kyungju, Korea), which was unearthed in 1973, is an ancient tomb built in the Shilla Era between the 5th∼6th centuries by the method of Juk-suk-mok-gwak. With the excavation of this tomb more than 11,500 articles of luxurious and splendid relics including gold and silver ornaments, weaponry and horse gears were obtained. Among the excavated articles, the saddle flap with a drawing of flying horse on it is the first relic of its kind from the Shilla Era. and 'Chonma'(a flying horse), the name of the tomb. was named after this drawing. The saddle flap is highly valuable in that it provides the idea of how goad the people of Shilla were at drawing. Although a lot of researches have been released about the relics from the Chonmachong, this study is to focus on the fabrics from the excavation, all of which are in the Kyongiu Museum's collection. The findings of this study are as follows : 1 The subject of this study is mainly on the fabrics used in horse gears, the pieces of cloth that were used to spread on a saddle or to underlay beneath a saddle. As the Shilla Dynasty tried to restrict excessive ornamentation on horses and it is assumed that the fabrics used are different. according to the social status. 2. The subject articles are four plain fabrics, three fabrics of combined -construction and one braid, the warp-faced compound woven silks of combined-construction was found for the first tinge in Korea, and is the typical quality sick with patterns woven with dyed threads in different colors. 3. It is ascertained by the Chonmachong excavation that polychrome woven silk was used not only for the clothes of the upper classes but also for the ornaments of their horses in the Era of the Three Kingdoms.

• Fashion & Textile Research Journal
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• v.14 no.6
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• pp.1024-1031
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• 2012

The thermal bonding PET fabrics were produced through high temperature steaming (HTS) of low melting PET yarn as warp and composite fancy yarn containing low melting PET yarn as weft. The low melting PET yarn of sheath-core structure consisted of a regular PET in core portion and low melting PET in sheath portion. The composite fancy yarn consisted of regular PET yarn as inner part and effect part and low melting PET yarn as binding part. This study was carried out to investigate the melting behavior of thermal bonded PET fabric, the effect of HTS on the thermal bonding, mechanical properties, and dyeing properties. The melting peak of low melting PET yarn showed two melting peaks caused by sheath-core structure. Almost the entire thermal bonding of the fancy PET fabrics containing low melting PET yarn has formed at $200^{\circ}C{\times}3min$ of HTS. The tensile strength in warp and weft direction of the fancy PET fabrics slightly decreased as temperature of HTS increased. The total K/S value of the fancy PET fabrics decreased slightly to $180^{\circ}C{\times}3min$ of HTS, while increased slightly above $200^{\circ}C{\times}3min$ of HTS. The changes in the hue angle ($H^{\circ}$) of the thermal bonded fancy PET fabrics dyed with disperse dyes hardly ever happened.

• Journal of Korea Multimedia Society
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• v.12 no.4
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• pp.512-520
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• 2009

Maximum intensity projection (MIP) is a volume rendering method which extracts maximum values along the viewing direction through volume data. It visualizes high-density structures, such as angio-graphic datasets so that it is frequently used in medical imaging systems. We have proposed an efficient two-step MIP acceleration method that uses the recent CPUs. First, we exploited SIMD instructions to reduce conditional branch instructions which take up a considerable part of whole rendering process, so that we improved rendering speed. Second, we proposed a new method, which accesses volume and image data successively by modifying the shear-warp rendering. This method improves memory access patterns so that cache misses are reduced. Using the current CPUs, our method improved the rendering speed by a factor of 7 than that of the shear-warp rendering.

• Journal of Digital Convergence
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• v.12 no.12
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• pp.217-225
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• 2014

The objective of this study is to propose the implications using theory of reasoned action(TRA) on u-Tour system. This research model through TRA is consisted as three constructs: user-friendliness(cognitive), perceived usefulness(cognitive) and purchase intention(affective). This study analyzes with a total of 153 respondents and used PLS-SEM method considering the small number of samples. Also, with the analysis, WarpPLS software is used in order to ferret out non-linear relationship between the constructs of research model. As a result of analysis, this research model shows statistical level significantly on proposed hypotheses and the applicability of TRA model in u-Tour system. Furthermore, additional analysis presents the possibility of non-linear relationship on each path between the constructs of research model showing J-shape. Also, the result showes the fact that the relationship had partly negative (-) effect on dependent factor. Additional analysis proposes that income variable as base of purchase intention has a moderating effect on all paths of research model.

• Journal of the Korean Society of Costume
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• v.58 no.1
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• pp.9-16
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• 2008

Six of the Imdang tombs containing remains with imprints of ancient fabrics and textiles were investigated. Within the tombs, a total of 120 pieces of imprinted fabrics and textiles were investigated, all of which belongs to $5{\sim}6C$ Shilla period. All of the hemp textiles examined exhibited similar characteristics found in ancient hemp textiles: they were woven by plain weave technique with s-twist threads. The examined silk could be categorized into plain woven silk, cho, and double woven brocade, all of them made with non-twisted threads and degummed silk. The density of the plain woven silk ranged from 39 threads to 144 threads. Cho was also found, which showed similar characteristics to those of Gaya and Bakjae tombs. One piece of 2/1 twill weave on plain ground and 12 pieces of double woven brocade were found and their average density was $97.4{\times}33.4/cm$ with denser warp than weft. The various thickness of the threads were observed in the examined plain braid. The silk with twining technique showed thicker warp than weft. This is similar to the techniques of fabrics found in the King Muryeoung's Tomb of the Bakjae period. Fabrics with the purple-like color were observed in the some of the double woven brocades and also on the plain woven silk imprinted on the remains. The purple-like color was revealed to be purple with a tint of violet. The two tombs from which the imprinted fabrics with purple-like color were found belonged to top-class social level of the Shilla period, which informs that the purple color was used exclusively for the people of higher social status. The floss silk was found between the double woven brocade and plain woven silk of the belt, which is an important evidence that the floss silk was used for stuffing in the early 6th century.

• Composites Research
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• v.23 no.5
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• pp.22-29
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• 2010

This paper describes the evaluations of tension-compression fatigue characteristics and life for glass fiber/epoxy laminate composite applied to railway bogie to reduce weight. Test samples of tension-compression fatigue were composed of glass fiber/epoxy 4-harness woven laminate composites with different stacking sequence of warp-direction, fill-direction and ${\pm}45^{\circ}$-direction. The tension-compression fatigue test was conducted with stress ratio (R) of -1 and frequency of 5Hz. Goodman diagram were used to evaluate the fatigue characteristics and life of glass fiber/epoxy 4-harness satin woven laminate composite. Anti-buckling jig was designed to prevent buckling of specimen under compression load. The test results showed that the fatigue characteristics of glass fiber/epoxy 4-harness satin woven laminate composite with stacking sequence of warp-direction had a good performance in comparison with that of SM490 used to conventional metal railway bogie.

• The Research Journal of the Costume Culture
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• v.13 no.5 s.58
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• pp.729-742
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• 2005

This paper studied the ban on 'Po[포]', including hemp and ramie, on the basis of Joseon Wangcho Silok (the True Record of Joseon Dynasty). Po is the important point which can help to understand the people's life related with clothing. This paper showed that in the early years of the Joseon Dynasty, the state had forced kinds of bans on some fabrics many times. Among the bans of the fabrics-making the main part was the bans on Po, along with rice, used as money in those days. The state had on Po enacted on the policy to intend to promote paper money circulation more widely. However, people didn't want to use paper money. The reason why cloth could be practical and functional as a kind of currency was that people could make clothes with it at any time while they used it as money. People avoided using paper money that could not be used in that way, and so did public officials. At that time, Po that was generally used as money was the hemp of five warp threads. The measurement of the hemp in 7chi[촌; a Korean inch] by 35chok[척] and 32cm by 16m by modern metric. It also showed that it has been thought that the blended fabrics are the fabrics that were made of raw silk-threads and cotton threads as warp and weft respectively. However, the fact that there is a record of 'Jeo Ma Gyo Jik Po[저마교직포의]'(blended fabrics and clothes made of ramie and hemp) and there appear the new proofs of the fieldwork investigation shows that the concept of blended fabrics might be various or changeable as time passed.