• KSBB Journal
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• 제24권1호
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• pp.25-29
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• 2009

Saccharomyces cerevisiae의 deletion mutant를 이용하여 ydc1, ypc1, scs7, sur1, csg2, ipt1, Icb4, Icb5, dpll의 deletion이 세라마이드의 생산에 미치는 영향을 고찰하였다. 세라마이드는 ELSD가 연결된 HPLC를 통하여 분석하였으며 ${\triangle}$ydc1 mutant의 세라마이드 생산량이 6 mg ceramide/g cell로 최대량을 나타내었으며 ${\triangle}$sur1 mutant, ${\triangle}$lcb5 mutant, ${\triangle}$dpll mutant의 경우 control로 사용한 BY4742와 비슷한 세라마이드 생산량을 나타내었고, 그 외 ${\triangle}$ypc1 mutant, ${\triangle}$scs7 mutant, ${\triangle}$csg2 mutant, ${\triangle}$ipt1 mutant, ${\triangle}$lcb4 mutant는 BY4742보다 낮은 세라마이드 생산량을 나타내었다.

• 한국재료학회지
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• 제9권5호
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• pp.528-532
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• 1999

Y$_2$O$_3$films were grown on SiO$_2$-covered Si(111), and hydrogen-terminated Si(111), and hydrogen-terminated Si(111) substrates at 50$0^{\circ}C$ by ultrahigh vacuum ionized cluster beam deposition (UHV-ICB). The microstructures and growth behavior of these films have been investigated by transmission electron diffraction (TED) and high-resolution transmission electron microscopy(HREM). The TED results show that the $Y_2$O$_3$grown on the SiO$_2$-Si has the epitaxial relationship of (11-1)Y$_2$O$_3$∥(111)Si and [-110]Y$_2$O$_3$∥[-110]Si. The film on the H-Si substrate contains YS\ulcorner and amorphous YSi\ulcornerO\ulcorner layers at the interface, having the orientation relationship each other. For the YSi\ulcorner and the Si substrate, the relationship is (0001)YSi\ulcorner∥(111)Si and [1-210]YSi\ulcorner∥∥[-110]Si. For the $Y_2$O$_3$and the YSi\ulcorner ; the relationship is as follows: (11-1)Y$_2$O$_3$∥(0001)YSi\ulcorner and [-110]Y$_2$O$_3$∥[1-210]YSi\ulcorner(111)Y$_2$O$_3$∥(0001)YSi\ulcorner and [-110]Y$_2$O$_3$∥[1-210]YSi\ulcorner. Explanation is given to describe the formation mechanisms of the interfacial phases of SiO\ulcorner, YSi\ulcornerO\ulcorner and YSi\ulcorner. It is shown that the crystallinity of the $Y_2$O$_3$film on the SiO$_2$-Si(111) is better than that of $Y_2$O$_3$on H-Si(111).

• Journal of Korean Vacuum Science & Technology
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• 제6권1호
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• pp.51-54
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• 2002

Polymer EL devices of glass/ITO/PI/MEH-PPV/Al structure were fabricated using spin coating and the Ionized Cluster Beam deposition technique. PMDA-ODA type thin polyimide films which can be used as a impurity blocking layer of EL device were deposited by ICB. According to our previous results, the packing densities of polyimide films were subject to change and depend on their deposition condition. By inserting a Pl layer with various thickness and packing density, I-V characteristics and life time of the devices were investigated to determine the role of a interlayer. The blocking of impurity diffusion from ITO to luminescent layer were confirmed by XPS.

• 한국재료학회:학술대회논문집
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• 한국재료학회 1992년도 추계학술발표강연 및 논문개요집
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• pp.6-6
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• 1992

Ionized cluster beam deposition (ICBD) technique has been employed to fabricate high-purity crystalline polyimide (PI) film. The pyromellitic dianhydride (PMDA) and oxydianiline (ODA) were deposited using dual ICB sources, Fourier trans forminfraredspectroscopy (FT-IR), X-ray photoemission spectroscopy (XPS), and Transmission electron microscopy (TEM)study show that the bulk and surface chemical properties and the crystalline structure are very sensitive to the ICBD conditions such as cluster ion acceleration voltage and ionization voltage, At optimum ICBD conditions, the PI films have a maximum imidization, negligible impurities(∼1% isoimide), and a good crystalline structure probably due to the high surface migration energy and surface cleaning effect. These characteristics are superior to those of films deposited by other techniques such as colvent cast, vapowr deposition, or sputtering techniques.

• 한국해양공학회지
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• 제20권6호
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• pp.18-23
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• 2006

This paper introduces the results of the development of a new mobile digital DC-arc welding machine (DDWM). A simple PI controller is applied to the DDWM to control the output welding current that is tracking the constant setting current. Furthermore, a hot-start function, an anti-stuck function, a standby mode and an intelligential circuit breaker (ICB) are included in the DDWM. The DDWM increases welding quality and saves more power energy than a conventional welding machine. The DDWM is changed from ready mode into the standby mode, automatically, after 2-minute intervals from this unload start. Then, the DDWM is changed into ready mode, automatically, since it is reused for welding. Moreover, the DDWM increases welding quality, productivity and reduces costs of welding. So, the DDWM can make a considerable contribution to the mobile welding industries. The effectiveness of the DDWM was proven by the experimental results.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2006년도 전기학술대회논문집
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• pp.71-72
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• 2006

This paper introduces the results of the development of a new mobile Digital DC-arc Welding Machine (DDWM). A simple PI controller is applied to the DDWM to control the output welding current tracking the constant setting current. Furthermore, a hot-start function, an anti-stuck function, a standby mode and an intelligential circuit breaker (ICB) are included in the DDWM. The DDWM increases welding quality and saves more power energy than a conventional welding machine. Because the DDWM is changed from ready mode into the standby mode automatically after 2 minutes interval from this unload start. Then the DDWM is changed into ready mode automatically since it is reused to weld. Mover, the DDWM increases welding qualify, productivity and reduces costs of welding. So, the DDWM can have a great of contribution to the mobile welding industries. The effectiveness of the DDWM was proven by the experimental results and durable test.

• 대한화학회지
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• 제30권4호
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• pp.335-450
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• 1986

$25{\circ}$에서 $[Co(en)]_3Cl_3,\;[Co(NH_3)_6Cl_3$수용액의 열역학적 해리상수를 1~2000bar의 압력범위에서 전도도법으로 측정하였다. 착물이 해리할 때 하전을 띤 이온이 생성하여 부피가 감소하므로 압력이 증가함에 따라 해리상수($K^T$)는 커졌다. 즉 $[Co(en)]_3Cl_3$에 대한 $pK^T$값은 1bar에서 2.16, 500bar에서 2.08, 1000bar에서 2.08, 1500bar에서 2.05, 2000bar에서 2.03이었고, $[Co(NH_3)_6Cl_3$의 $P^K^T$는 1bar에서 2.02, 500bar에서 1.96, 1000bar에서 1.90, 1500bar에서 1.88, 2000bar에서는 1.87이었다. 각 압력에서 Stokes반경과 해리상수($K^T$)값을 비교 분석하여 착물의 이온쌍 형성에는 정전기적 인력 이외에 Internal Conjugate Base(ICB)효과도 영향을 미쳤으며 이효과는 압력이 증가할 수록 커졌다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제35권2호
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• pp.112-123
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• 2013

This study aims to investigate the clinical outcome following treatment of peri-implantitis lesions. Five subjects with 7 implants were treated with surgical approach. Four subjects with 6 implants were initially treated with non-surgical approach or hygiene control. However, inflammation was not resolved and more bone loss was found. Therefore, surgical treatment was performed. After surgical exposure of the defect, granulation tissue was removed and implant surface was treated using tetracycline and chlorhexidine. Then, the flaps were sutured. The wound healing was performed in a non-submerged mode. The present finding demonstrates stable results without progression of bone loss. In one subject, deep V shaped bone defect was filled with bone substitute (ICB, CanCellous Bone, Rockey Mountain Tissue Bank, USA), and resorbable membrane (Lyoplant$^{(R)}$, B.Braun Aesculap AG, Germany) was placed over the grafted defect and healing abutment was connected. However, the inflammation was not resolved and more bone loss was found. At one month after regenerative surgery, the implant was removed.

• 한국진공학회지
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• 제1권1호
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• pp.139-144
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• 1992

Ionized Cluster Beam(ICB) 방법을 이용하여 Polyimide(PI) 박막을 증착시켰다. 증 착된 PI 박막의 결정성과 이미드화의 정도를 투과전자현미경(TEM)과 적외선 분광 스펙트럼 (FT-IR)을 이용하여 분석하였다. 최적의 조건에서 증착된 PI 박막은 이미드화가 최대로 증 가하였고 결정구조를 가짐을 관찰할 수 있었다. 이것은 다른 방법으로 제작된 PI 박막과 비 교할 때 훨씬 우수한 것이다.

• 응용통계연구
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• 제27권1호
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• pp.31-41
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• 2014

행렬도(biplot)는 이원표 자료행렬(two-way data matrix)의 행과 열을 한 그림에 동시에 나타내는 탐색적 방법으로, 복잡한 다변량 분석 결과를 보다 쉽게 파악할 수 있는 장점이 있다. 특히 주성분인자 행렬도(principal component factor biplot; PCFB)는 인자분석을 통해서 변수들 간의 상호의존 구조를 탐색하기 위한 시각적 도구이다. 자료에 따라 잠재된 변수들이 독립(independent)이고 비가우시안(non-Gaussian) 분포를 가진다는 사전 정보가 있을 때, Jutten과 Herault (1991)가 제안한 독립성분분석(independent component analysis)을 이용한다. 이 경우 주성분법을 이용한 인자분석을 적용하면 원래 변수들의 상호 관계를 잘못 해석할 수도 있다. 따라서 본 논문에서는 자료에 따라 잠재된 변수들이 독립이고 비가우시안 분포를 가진다는 사전 정보가 있을 때, 독립성분분석을 응용하여 원래 변수들 간의 상호 관계를 기하학적으로 살펴볼 수 있는 시각적 도구인 독립성분 행렬도(independent component biplot; ICB)를 제안하려 한다.