• 한국정밀공학회지
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• 제15권7호
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• pp.98-103
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• 1998

Recently, DVD/CD compatible driver is needed for DVD and CD is widely used as a new optical data restoring device. The optical systems of DVD and CD driver are different because they have different optical feature. If only one objective lens is used, the change of an aperture or a dual focal length of the lens is required. This method, however, increases the number of parts and results in loss of the power of laser light. Hence, we propose a dual lens actuator design that can read DVD and CD respectively. Albeit magnetic spring is important mechanism in the dual lens actuator design, there has not been the systematic approach to design the mechanism in the preceding researches. In this article. the guideway to design magnetic spring is presented by using the qualitative theoretical approach and the finite element analysis.

• 한국컴퓨터정보학회지
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• 제5권1호
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• pp.47-53
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• 1998

멀티미디어 애플리케이션 개발이나 CD-ROM 타이틀 개발 등 문자, 영상, 음성, 비디오, 하이퍼, 애니메이션 등의 각종 멀티미디어 데이터를 포함한 형태의 교안 작성이나, 멀티미디어용 안내서, 홍보물 혹은 광고물 제작, 학습용, CD-ROM 타이틀을 제작할 수 있으며, 특히 대학에서 멀티미디어 수업 교재로 활용을 많이 할 수 있는 S/W이다.

• 약학회지
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• 제52권1호
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• pp.48-55
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• 2008

CD29 $({\beta}1-integrins)$ is one of major adhesion molecules involved in regulating cell adhesion, migration and morphological changes. In this study, we investigated the regulatory role of CD29 in monocytic functions using monocytic cell line U937 cells. CD29 was found to be one of highly expressed membrane proteins in U937 cells, according to flow cytometric analysis. The activation of CD29 by agonistic antibody MEM101A and extracellular matrix protein (ECM) fibronectin strongly induced cell-cell and cell-fibronectin adhesions. However, blocking antibodies to CD98 and CD147 showed different inhibitory features in these two adhesion events. Furthermore, U0126, an ERK inhibitor, only blocked cell-cell adhesion but not cell-fibronectin adhesion, indicating that cell-cell or cell-fibronectin adhesion events may be regulated by different molecular mechanisms. Meanwhile, CD29 activation also enhanced ROS generation but not phagocytic ability, and similarly radical scavenger N-acetyl-L-cysteine strongly blocked CD29-mediated cell-cell adhesion, implying that ROS may play a critical role in up-regulating cell-cell adhesion. Therefore, our data suggest that the activation of CD29 may be critically involved in regulating monocytic cell-mediated cell-cell adhesion and ROS generation.

• 한국광학회:학술대회논문집
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• 한국광학회 2002년도 하계학술발표회
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• pp.98-99
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• 2002

대표적인 II-VI족 극성 반도체 결정인 ZnTe[001]와 ZnCdTe MQW에서 시료의 에너지 띠보다 낮은 에너지의 펨토초 티타늄 사파이어 레이저를 이용하여 결맞는 포논을 발생시키고 그 특성을 관찰하였다. 결맞는 포논의 신호는 그림1)과 같이 반사 및 투과형 전기 광학적 샘플링(Reflective/Transmissive Electro-Optic Sampling： REOS/TEOS)방법과 여기-탐사광 방법으로 시간 영역에서 측정하였다. (중략)

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1995년도 추계학술대회 논문집
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• pp.126-130
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• 1995

$CdS_{1-x}Te_{1-x}$ polycrystalline thin films were fabricated from CdS and CdTe powder by co-evaporation method at $10^{-6}$ Torr. The Optimum evaporation condition was substrate temperature $T_{s}$=$150^{\circ}C$, evaporation time t=30 min. XRD spectrums indicated that the crystal structure chanced from zinc blonde (x$\leq$0.22) to wurtzite (x$\geq$0.96) through mixed structure (0.22$\leq$0.74) as composition value x increase to CdS. Conductive type was n-type by hot point probe method. van der Pauw method was not applicable for x<0,5 due to high hall voltages, Electrical resistivity and Hall carrier mobility were decreased as x increase, while Hall carrier concentration was increased. The optical bandgap of $CdS_{1-x}Te_{1-x}$ polycrystalline thin films measure d at R.T. had quardratic form and the bowing parameter was fitted as 1.98eV for theoretical value of 2.0eV. I-V characteristics of In/CdTe/$CdS_{x}Te_{1-x}$Au Schottky diodes showed that CdS-rich one had better forward characteristics than CdTe-rich one.

• 한국축산식품학회:학술대회논문집
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• 한국축산식품학회 2006년도 정기총회 및 제37차 춘계 국제학술발표대회
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• pp.133-137
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• 2006

본 연구의 목적은 $\beta$-CD를 가교화 시켜 육가공 제품의 주원료인 lard에 내재하는 cholesterol을 효과적으로 제거하기 위한 최적조건 확립이다. 따라서 adipic acid로 가교화한 $\beta$-CD를 이용하여 lard에서 cholesterol을 제거하고 더 높은 효율을 찾기 위하여 실시되었다. 가교화 $\beta$-CD를 이용해 lard에서 cholesterol 제거 실험결과의 최적 조건은 lard:distilled water=1:1, 가교화 $\beta$-CD 5%, 교반온도 $40^{\circ}C$, 교반시간 10분, 교반속도 150rpm으로 실험한 결과 cholesterol 제거율이 평균 92.32%이었다. 또한 10회 재활용 결과 평균 98.04%의 재활용률을 보였으며, 8회 이후에는 유의적으로 감소하여 가교화 $\beta$-CD의 효율적인 재활용이 가능함을 시사하였다. 이 실험의 결과 가교화 $\beta$-CD로 lard의 cholesterol 제거 최적조건을 규명함으로써 콜레스테롤을 저하시킨 육가공 제품의 생산 가능성을 보였다.

• 반도체디스플레이기술학회지
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• 제19권4호
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• pp.94-98
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• 2020

The core/shell of nanowires (NWs) with Cu-doped CdSe quantum dots were fabricated as an electron transport layer (ETL) for perovskite solar cells, based on ZnO/TiO2 arrays. We presented CdSe with Cu2+ dopants that were synthesized by a colloidal process. An improvement of the recombination barrier, due to shell supplementation with Cu-doped CdSe quantum dots. The enhanced cell steady state was attributable to TiO2 with Cu-doped CdSe QD supplementation. The mechanism of the recombination and electron transport in the perovskite solar cells becoming the basis of ZnO/TiO2 arrays was investigated to represent the merit of core/shell as an electron transport layer in effective devices.

• 한국전자파학회논문지
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• 제26권1호
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• pp.101-112
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• 2015

II~VI족 화합물 반도체 $Zn_xCd_{1-x}S$ 박막을 Indium-tin-oxide(ITO)가 도포된 유리기판 상에 열증발법을 사용하여 증착하였다. 박막의 합성비(molar ratio) x($0{\leq}x{\leq}1$)는 CdS(x=0) 박막과 ZnS(x=1) 박막을 포함하여, 삼원화합물 $Zn_xCd_{1-x}S$ 박막을 제조하기 위하여 변화시켰다. 또한, 증착한 박막의 결정성을 높이기 위하여 진공전기로에서 열처리 하였으며, 분광학적 특성조사를 위해서는 $400^{\circ}C$에서 열처리한 $Zn_xCd_{1-x}S$ 박막이 최적임을 알았다. $Zn_xCd_{1-x}S$ 박막의 합성비(x)와 전자적 구조를 조사하기 위하여 X-선 광전자 분광법(XPS)을 사용하였고, 박막시료의 광학적 에너지 띠 간격 $E_g$는 자외선-가시광-근접 적외선(UV-Vis-NIR) 분광법으로 측정하였으며, 합성비(x)값이 0에서 1까지 변화함에 따라 2.44~3.98 eV 범위의 값을 보여주었다. 끝으로, THz-TDS(Time Domain Spectroscopy) 시스템을 사용하고 $Zn_xCd_{1-x}S$ 박막의 THz파 특성을 측정하여 테라헤르츠(THz) 영역용 전자 및 광학 소자로서 응용가능성을 확인하였다.

• 한국환경농학회지
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• 제6권1호
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• pp.25-30
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• 1987

수도(水稻)의 중금속(重金屬) 흡수(吸收)를 경감(輕減)시키기 위(爲)하여 광미사(鑛微砂) 및 광산폐수(鑛山廢水)에 의(依)해 중금속(重金屬)의 오염(汚染) 정도(程度)가 다른 두 토양(土壤)에 개량제(改良劑)인 중과석(重過石), 용성인비(熔成燐肥), 소석회(消石灰), 규회석(珪灰石) 및 석고(石膏) 등(等)을 처리(處理)하여 토양(土壤) pH 및 현미중(玄米中) 중금속(重金屬)(Cd, Cu Zn 등(等))함량(含量)을 조사분석(調査分析)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 개량제간(改良劑間)의 뚜렷한 경향(傾向)은 없었으나, 현미중(玄米中) Cd, Cu, Zn 등(等)의 흡수(吸收) 경감(輕減) 정도(程度)는 重金屬(중금속) 오염도(汚染度)가 낮은 토양Ⅱ(土壤) 보다 오염도(汚染度) 높은 토양(土壤)Ⅰ에서 그 효과(效果)가 컸다. 2. 토양(土壤)Ⅰ에서 현미중(玄米中) Cd 농도(濃度)를 0.4ppm 이하(以下)로 감소(減少)시킬 수 있는 개량제(改良劑)의 시용량(施用量)은 중과석(重過石)이 98, 용성인비(熔成燐肥)가 225, 소석회(消石灰)가 190, 석고(石膏)는 276㎏/10a였다. 3. 개량제(改良劑)로 시용(施用)된 동일(同一) 린산함량(燐酸含量)으로서 중금속(重金屬)의 흡수경감효과(吸收輕減效果)는 중과석(重過石)이 용성인비(熔成燐肥)보다 컸고, 동일(同一) 알칼리분으로서는 소석회(消石灰)가 용성인비(熔成燐肥)나 규회석(珪灰石)보다 효과적(效果的)이었다. 4. 토양중(土壤中) pH와 현미중 (玄米中)Cd 및 Zn 함량(含量)과는 유의성(有意性) 있는 부(負)의 관계(關係)가 있었다.

• Journal of Nutrition and Health
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• 제44권6호
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• pp.474-480
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• 2011

Calcium (Ca) is an essential element to maintain body homeostasis. However, many factors disturb calcium absorption. Aspartic acid chelated calcium (AAC) was synthesized by new methods using calcium carbonate and aspartic acid. This study was carried out to investigate the bioavailability of AAC in Ca-deficient rats. The experimental groups were as follows: NC; normal diet control group, CD-C; untreated control group of Ca-deficient (CD) rats, CD-$CaCO_3$; $CaCO_3$ treated group of CD rats, CD-AAC; AAC treated group of CD rats, and CD-SWC; and seaweed-derived Ca treated group of CD rats. The Ca content of various types of Ca was held constant at 32 mg/day, and the four CD groups were fed for 7 days after randomized grouping. Ca content in serum, urine, and feces within feeding periods were analyzed to confirm Ca absorption. Serum Ca content was significantly higher in the CD-AAC (11.24 mg/dL) and CD-SWC (10.12 mg/dL) groups than that in the CD-C (8.6 mg/dL) group 2 hours following the first administration. The Ca content in feces was significantly lower in the CD-AAC (35.4 mg/3 days) and CD-SWC (71.1 mg/3 day) groups than that in the CD-$CaCO_3$ (98.7 mg/3 days) group (p > 0.05). AAC had a 2.3-fold higher absorption rate of Ca than that of SWC. No differences in fibula length were observed in the NC and CD groups. The fibula weights of the CD-AAC (0.33 g) and CD-SWC (0.33 g) groups increased compared to those in the CD-C (0.27 g) group; however, no significant difference was observed between the CD groups. We conclude that bioavailability of AAC is higher than that of seaweed-derived Ca or inorganic Ca. Thus, these findings suggest the AAC has potential as a functional food material related to Ca metabolism.