• 한국재료학회지
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• 제11권6호
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• pp.460-464
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• 2001

Pechini방법으로 제조한 La$_{0.8}$Ca$_{0.2}$CrO$_3$CLC소결체와 La$_{0.8}$Ca$_{0.2}$CrO$_3$CLC-Green체를 YSZ에 적층한 후 온도의 함수로 계면에서의 미세구조와 성분이동 등의 거동을 고찰하였다. CLC-G/CLC와 CLC/YSZ계면에서의 CLC면은 반응온도에 상관없이 XRD 관찰에서 주상은 La$_{1-x}$ Ca$_{x}$CrO$_3$그리고 CLC와 반응하지 않은 YSZ면의 결정 상은 cubic-ZrO$_2$으로 각각 나타났다. CLC/YSZ반응 계면의 성분이동은 Zr > La>>Cr>>>Ca 순이었으며, 온도에 따른 개개 성분의 이동도 차이는 크지 않았다. CLC/YSZ계면간의 결합은 계면성분간의 과다한 성분이동 없이 현 연구의 온도전체에 걸쳐 가능한 것으로 나타났다. CLC-G/CLC간의 SEM미세구조는 결합 면을 경계로 저온에서는 결정의 입자크기 차이를 보이다가 온도가 증가할수록 균일화되는 경향을 보였다.였다. 보였다.였다.

• 폴리머
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• 제30권2호
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• pp.182-186
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• 2006

CLC는 주기적인 나선구조 때문에 빛을 선택적으로 반사하는 특성을 보이는데, 반사 파장대역이 넓은 CLC를 광반응에 의한 상 분리 현상을 이용하여 제조하였다. CLC 액정 셀에 의하여 반사되는 빛의 파장은 노광하는 빛의 세기가 작을수록 그리고 UV 흡수 dye의 양이 증가할수록 범위가 증가하여 초기 50 nm의 반사 파장대역을 300 nm까지 넓힐 수 있었다. 광경화된 CLC 액정 셀 내에 상 분리에 의하여 형성된 다양한 CLC 피치 분포를 SEM으로 관찰하였고, ATR-IR 실험을 이용하여 CLC피치 분포가 넓어지는 것이 상 분리에 의한 것임을 확인하였다.

• 폴리머
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• 제30권5호
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• pp.422-425
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• 2006

콜레스테릭 액정은 주기적인 나선구조 때문에 빛을 선택적으로 반사하는 특성을 보이는데, 반사파장 대역이 넓은 cholesteric liquid crystal(CLC) 필름을 서로 다른 피치를 가지는 두 cyclic siloxane CLC의 열확산이나 저분자 물질에 의한 확산을 이용하여 제조하였다. 확산에 의한 CLC 액정 셀 내에 형성된 다양한 CLC 피치 분포를 SEM으로 관찰하였고, UV/Vis spectrometer를 이용하여 CLC 피치 분포 변화를 조사하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.45-46
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• 2023

CLC is used as a filling material for many buildings, and according to energy saving design standards, CLC also requires insulation performance. However, it shows lower insulation performance compared to organic insulation, so additional research is needed. Therefore, in this study, the insulation properties of CLC were analyzed by incorporating EPS beads with high insulation performance into CLC. In this experiment, EPS beads and blast furnace slag were replaced, and W/B was fixed at 33%. The EPS Bead mixing ratio was divided into 5 levels: 0, 0.5, 1.0, 1.5, 2.0 (%), and the experimental items were measured for apparent density and thermal conductivity. As a result of the experiment, the apparent density and thermal conductivity tended to decrease as the mixing ratio of EPS beads increased. It is judged that the density decreased due to the low density and the micropores inside, and the thermal conductivity also decreased.

• 한국도서관정보학회지
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• 제43권3호
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• pp.79-100
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• 2012

중국도서관분류법(中國圖書館分類法)(CLC: Chinese Library Classification)은 중국에서 가장 널리 통용되는 국가 표준분류법으로 1975년에 초판을 발행한 이래 2010년에는 제5판을 출판함으로써 약 9년마다 개정을 하고 있다. 이 연구에서는 CLC의 성립배경과 발전과정 그리고 제5판의 특성과 개정내용을 분석함으로써 한국과 문화적으로 오랜 관련성을 유지해온 중국의 대표적인 분류법을 고찰하고 한국십진분류법(KDC) 전개에 참고할 시사점을 파악하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 가을 학술논문 발표대회
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• pp.205-206
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• 2022

This study intends to conduct tests on subsidence and drying shrinkage by mixing CaO-CSA expansion materials to ensure the stability of CLC, and to understand its properties. Based on CLC of 0.6, the replacement ratio of CaO-CSA expansion material was conducted at five levels compared to blast furnace slag, and the results are as follows. The replacement of CaO-CSA expansion material at an appropriate level produces ethringhite and potassium hydroxide, and it is believed that the internal voids of CLC and the Tobelmorite interlayer structure are charged to increase the structural stability, leading to an increase in compressive strength and a decrease in the drying shrinkage. However, it is judged that tissue relaxation due to excessive substances in the high replacement ratio affects the stability of CLC. In the future, we will conduct additional experiments on density, absorption rate, flow test, and settlement, and evaluate and analyze the stability of CLC by selecting the optimal replacement ratio of CaO-CSA expansion materials.

• Environmental Engineering Research
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• 제19권4호
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• pp.299-308
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• 2014

This study presents a review on Chemical looping combustion (CLC) development, design aspects and modeling. The CLC is in fact an unmixed combustion based on the transfer of oxygen to the fuel by a solid oxygen carrier material avoiding the direct contact between air and fuel. The CLC process is considered as a very promising combustion technology for power plants and chemical industries due to its inherent capability of $CO_2$ capturing, which avoids extra separation costs of the of $CO_2$ from the rest of flue gases. This review covers the issues related to oxygen carrier materials. The modeling works are reviewed and different aspects of modeling are considered, as well. The main drawbacks and future research and prospects are remarked.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 봄 학술논문 발표대회
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• pp.54-55
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• 2020

Recently, "The rules on the standards of evacuation and fire protection of buildings" require that non-burnable materials such as non-combustible and semi-non-combustible materials be used as the materials applied to the building's exterior walls, but styrofoam, which is a combustible material, has been applied a lot and became a social issue. In this study, we developed a non-combustible outer wall molding to secure construction and economic feasibility and free expression using CLC(CLC: Cellular Light-weight Concrete).

• 한국정보관리학회:학술대회논문집
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• 한국정보관리학회 2003년도 제10회 학술대회 논문집
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• pp.127-138
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• 2003

본 연구는 한국ㆍ중국ㆍ일본에서 사용되고 있는 표준분류법인 KDC, CLC, NDC의 불교분야를 비교 분석하고, 효과적인 문헌 분류를 위한 KDC 불교분야 개선안을 제시하였다.

• Journal of Korean Neurosurgical Society
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• 제64권5호
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• pp.799-807
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• 2021

Objective : Cerebrospinal fluid leakage related complications (CLC) occasionally occur after intradural spinal surgery. We sought to investigate the effectiveness of early ambulation after intradural spinal surgery and analyze the risk factors for CLC. Methods : For this retrospective cohort study, we enrolled 314 patients who underwent intradural spinal surgery at a single institution. The early group contained 79 patients who started ambulation after 1 day of bedrest without position restrictions, while the late group consisted of 235 patients who started ambulation after at least 3 days of bed rest and were limited to the prone position after surgery. In the early group, Prolene 6-0 was used as the dura suture material, while black silk 5-0 was used as the dura suture material in the late group. Results : The overall incidence rate of CLC was 10.8%. Significant differences between the early and late groups were identified in the rate of CLC (2.5% vs. 13.6%), surgical repair required (1.3% vs. 7.7%), and length of hospital stay (2.99 vs. 9.29 days) (p<0.05). Logistic regression analysis revealed that CLC was associated with practices specific to the late group (p=0.011) and the revision surgery (p=0.022). Conclusion : Using Prolene 6-0 as a dura suture material for intradural spinal surgery resulted in lower CLC rates compared to black silk 5-0 sutures despite a shorter bed rest period. Our findings revealed that suture - needle ratio related to dura defect was the most critical factor for CLC. One-day ambulation after primary dura closure using Prolene 6-0 sutures appears to be a costeffective and safe strategy for intradural spinal surgery.