• 한국광학회:학술대회논문집
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• 한국광학회 2002년도 제13회 정기총회 및 2002년도 동계학술발표회
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• pp.38-39
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• 2002

• 한국의류학회지
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• 제30권2호
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• pp.255-265
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• 2006

The purpose of this study was to examine the dyeing properties of four kinds of composite yams that were twisted in different processes. The composite yarns consist of acetate and functional polyester in ratio of 70 : 30. The composite yams were dyed at 100$^{circ}C$ and 125$^{circ}C$ using three types of dyes, disperse dyes for acetate fiber, PET fiber and PET-acetate blended fiber, in the three primary colors. The exhaustion($\%$) and K/S value were observed for each case. Also the effects of four different twisting processes to dyeing properties and physical properties were examined. Regardless of twisting methods, the composite yarns that were dyed at 125$^{circ}C$ had higher exhaustion($\%$) than those were dyed at 100$^{circ}C$ with all three types of dyes; However, tendency of the K/S value after reduction cleaning process was measured at 100$^{circ}C$ and the value measured 125$^{circ}C$ had a great difference with disperse dyes for acetate and dyes for PET. The difference of the K/S values of composite yarns, when dyed at 100$^{circ}C$ and 125$^{circ}C$ with disperse dyes for PET-acetate blended fiber, was almost negligible. According to twisting methods K/S values were in the following order: AP1 > AP3 > AP4> AP2. This means that AP1, treated at 220$^{circ}C$, had the highest K/S value and K/S value becomes higher as the yam is higher twisted and becomes lower as lower twisted. On the other hand, the dry shrinkage and wet shrinkage showed low shrinkage rate when the twist was high and steam setting temperature was high.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1989년도 제2차 학술발표초록집
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• pp.69-70
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• 1989

• 한국광학회:학술대회논문집
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• 한국광학회 2007년도 동계학술발표회 논문집
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• pp.203-204
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• 2007

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 봄 학술발표회 논문집
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• pp.135-138
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• 2003

오늘날의 섬유산업은 단순히 입는다는 기능적인 면에서 탈피하여 인간의 미와 감성을 추구하는 매체로써의 역할을 요구하고 있다. 따라서 다양한 직물을 선호하는 소비자들의 욕구를 충족시켜주기 위하여 원사 자체가 점점 다양화 되어가고 있으며, 특히 합성섬유의 발명에 의해서 의류용 소재로 많이 사용되고 있다. 섬유에 감성을 부여하기 위한 방법으로 여러 가지가 있지만 최근 일본, 이태리 등을 중심으로 활발히 시도되고 있는 복합연사기술의 개발에 많은 관심이 집중되고 있다.[7] (중략)

• 한국의류산업학회지
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• 제9권2호
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• pp.243-248
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• 2007

This study is about the fabric attached to the relics excavated from the Shimchun-ri tomb of the 4th century and the Moonsan-ri tombs of the 5th century. We studied 5 pieces of fabric from the Shimchun-ri tomb: one piece was silk and the other four pieces were hemp. We were able to observe 8 pieces from the four tombs in Moonsan-ri, All of them except one ramie were silk. The two kinds of bast fiber found in the tombs of Shimchun-ri and Moonsan-ri were hemp and ramie, and they were found to be plain woven with S-twist thread which thickness is uneven. The density was more fine compared to the hemps found in the Kaya or Shinra tombs of the similar era. All of the silk textiles found in the Shimchun-ri and Moonsan-ri tombs used non-twisted thread, and were plain woven. Also, we found degummed and raw silk from the tombs. The average density of the silk textiles from these tombs are similar to other areas of the same time, and studies show that they used non-twisted thread in plain woven silk found in other tombs. Therefore, we can conclude that they usually used non-twisted thread when producing silk textiles.

• 조명전기설비학회논문지
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• 제17권6호
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• pp.72-76
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• 2003

편광분석법을 이용한 광섬유형 전류센서를 구성하여 다양한 전류측정 실험을 행하였다. 잔존 선형복굴절의 영향을 최소화하기 위하여 광섬유 센서 코일의 한쪽 끝에 Faraday 미러를 장착하였으며 일반적인 미러를 사용하는 경우와 출력의 안정성을 비교분석 하였다. 센서코일에 변형을 가하는 경우나 장시간에 걸친 안정성 실험에서도 Faraday 미러를 사용하는 경우에 출력의 안정성이 현저하게 증가함을 알 수 있었다.

• 한국통신학회논문지
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• 제7권4호
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• pp.161-166
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• 1982

本論文에서는 단일 모우드 광섬유의 고유 birefringence 및 twisting에 의한 birefringence 특성에 대해 理論的 分析과 實驗을 하였다. 分析過程에서 단일 모우드 광섬유는 선형 지연기로 모델링하였으며 측정결과 순수birefringence는 약 2.57 /m로 나타났다. 그리고 twisting에 의한 회전을 섭동이론에 의해 理論的으로 分析한 結果 회전각을 광섬유의 비틀림각에 선형적으로 변화되었으며 이러한 理論的結果는 實驗的結果와 거의 일치함이 分析되었다.

• 대한치과교정학회지
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• 제46권2호
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• pp.104-110
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• 2016

Objective: Traditional retainers (both metal and fiber-reinforced composite [FRC]) have limitations, and a retainer made from more flexible ligature wires might be advantageous. We aimed to compare an experimental design with two traditional retainers. Methods: In this prospective preliminary clinical trial, 150 post-treatment patients were enrolled and randomly divided into three groups of 50 patients each to receive mandibular canine-to-canine retainers made of FRC, flexible spiral wire (FSW), and twisted wire (TW). The patients were monitored monthly. The time at which the first signs of breakage/debonding were detected was recorded. The success rates of the retainers were compared using chi-squared, Kaplan-Meier, and Cox proportional-hazard regression analyses (${\alpha}=0.05$). Results: In total, 42 patients in the FRC group, 41 in the FSW group, and 45 in the TW group completed the study. The 2-year failure rates were 35.7% in the FRC group, 26.8% in the FSW group, and 17.8% in the TW group. These rates differed insignificantly (chi-squared p = 0.167). According to the Kaplan-Meier analysis, failure occurred at 19.95 months in the FRC group, 21.37 months in the FSW group, and 22.36 months in the TW group. The differences between the survival rates in the three groups were not significant (Cox regression p = 0.146). Conclusions: Although the failure rate of the experimental retainer was two times lower than that of the FRC retainer, the difference was not statistically significant. The experimental TW retainer was successful, and larger studies are warranted to verify these results.

• 한국산학기술학회논문지
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• 제11권6호
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• pp.2292-2299
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• 2010

온열안마기의 내부천으로 사용되고 있는 직물의 내구성을 향상시키고자 기존 PET/면 혼방직물의 마모현상을 분석하고, 그 문제점을 보완할 수 있는 난연성 PET 직물을 설계/제조한 후 물리적 성능 및 내구성을 평가하였다. 기존 직물의 경우 구동부분의 반복적인 마찰에 의한 마모뿐만 아니라, 구동시 내부천의 이동에 의해 발생하는 접힘 현상이 회복되지 못하기 때문에 직물의 파손이 가속화되는 것으로 나타났다. 따라서 섬유재질의 변경, 신축사, 강연사, 조직의 변경 등을 적용하여 물리적 성능 및 내마모성을 크게 개선한 내부천을 제조하였다. 특히 신축사를 사용 한 직물의 내구성은 크게 향상되어 기존 직물 대비 2배 이상의 사용시간을 증가시킬 수 있었으며, 강연사를 사용한 직물은 약 1.5배 정도 내마모시간이 증가하는 결과를 얻었다.