• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2005년도 후기학술대회논문집
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• pp.51-52
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• 2005

Optical characteristics of excitonic blue and green emission of Te-doped ZnSSe:Te epitaxial layers, grown by molecular beam epitaxy, were investigated by photoluminescence (PL) measurements. The Te-doped ternary specimen shows strong blue or green emission (at 300K) which is assigned to $Te_1$ or $Te_n$ $(n{\geq}2)$ cluster cluster bound exciton, respectively. Bright green and blue light emitting diodes (LEDs) have been developed using ZnSSe:Te system as an active layer. The green LEDs exhibit a fairly long device lifetime (>2000 h) when operated at 3 $A/cm^2$ under CW condition at room temperature.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2005년도 후기학술대회논문집
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• pp.242-243
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• 2005

The SrS:Ag, Cl thin films have been grown by the hot wall technique with S furnace placed on the outside of the growth chamber in order to investigate the crystallographic and optical characteristics. The XRD patterns indicate a strongly preferential orientation in the [200] direction. The PL spectrum has an emission peak of about 398nm which is assigned by the transition from $4d^{95}s^1$ to $4d^{10}$ of$Ag^+$ center.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2006년도 추계 학술대회논문집
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• pp.7-8
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• 2006

The governing equations for high-speed lateral atomizing injector nozzle flow based on the LES-VOF model in conjunction with the CSF model are presented, and then an integrated parallel computation are performed to clarify the detailed atomization process of a high speed nozzle flow and to acquire data which is difficult to confirm by experiment such as atomization length, liquid core shapes, droplets size distributions, spray angle and droplets velocity profiles. According to the present analysis, it is found that the atomization rate and the droplets-gas two-phase flow characteristics are controlled by the turbulence perturbation upstream of the injector nozzle, hydrodynamic instabilities at the gas-liquid interface, shear stresses between liquid core and periphery of the jet. Furthermore, stable and a high-resolution computation can be attained in the high density ratio (pl/ pg = 554) conditions conditions by using our numerical method.

• 마이크로전자및패키징학회지
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• 제10권3호
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• pp.83-88
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• 2003

증착온도와 어닐링 조건에 따른 반도체-원자 초격자 구조의 광전자특성이 연구되었다. 나노결정의 Si-O 초격자 구조는 MBE 시스템에 의해 형성되었다. 다층의 Si-O 초격자 다이오드는 매우 안정한 포토루미네슨스 특성과 높은 브레이크다운 전압을 갖는 양호한 절연 특성을 나타내었다. 이러한 결과는 미래의 초고속 및 저전력 CMOS 소자에서 SOI 구조의 대체 방안으로 사용될 수 있을 뿐만 아니라, 실리콘계 광전자 소자 및 양자 전자 소자에도 응용될 수 있을 것이다.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 1999년도 춘계학술발표대회 논문집
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• pp.122-125
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• 1999

The purpose of this study is to dlassify into types of traditionality reflected in modern Korean houses in 1990's designed by architec Modern houses were divided into five types through qualitative analysis. Analysis is categorized into three parts, space-pl structural elements ornamental elements. Characteristics of each type were defined as 'Indicative expression of the traditionalit', 'Decorative expression of the traditionality', 'Eclectic expression of the traditionality', 'Contemporary expression of the traditionalit', 'Abstract expression of the traditionality'. The results showed that 'Contemporary or Abstract expression of traditionality(type IV and V) were major types of modern Korean houses expressed traditionality. This reveals that in order to apply traditionality to the modern houses, simplifed and sbstracted for were preferred comparing with the direct imitation of traditional forms.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 춘계학술대회 논문집
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• pp.395-398
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• 2008

Interior permanent magnet synchronous motor(IPMSM) has become a popular choice in electric vehicle applications, due to their excellent power to weight ratio. In order to maximize the efficiency in such applications, this paper proposes the FNN(Fuzzy Neural-Network)-Pl controller. The controllable electrical loss which consists of the copper loss and the iron loss can be minimized by the error back propagation algorithm(EBPA). This paper considers the parameter variation about the motor operation. The operating characteristics controlled by efficiency optimization control are examined in detail.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.819-821
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• 2002

Photoluminescenc (PL) and low-voltage cathodoluminescence (CL) characteristics of $[xSrTiO_3+(1-x)Li_2TiO_3]:Pr^{3+}$ and $[xSrTiO_3+(1-x)Na_2TiO_3]:Pr^{3+}$ systems were investigated. The red luminescence intensities of these compounds are enhanced remarkably by the incorporation of $Li^+$ or $Na^+$ ion as compared to that of $SrTiO_3:Pr^{3+}$. The enhanced luminescence is speculated to result from both the charge compensation of $Pr^{3+}$ site and oxygen vacancies generated in the lattices by $Li^+$ or $Na^+$ ion.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제40회 동계학술대회 초록집
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• pp.489-489
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• 2011

The effect of Si quantum dots for solar cell appications was investigated. The 5 ~ 10 nm Si nanoparticle was fabricated on p-type single and poly crystalline wafer by magnetron sputtering and laser irradiation process. Scanning electron microscopy (SEM), atomic force measurement (AFM) and transmission electron microscopy (TEM) images showed that the Si QDs array were clearly embedded in insulating layer ($SiO_2$). Photoluminesence (PL) measurements reliably exhibited bandgap transitions with every size of Si QDs. The photo-current measurements were showed different result with size of QD and number of superlattice.

• 한국염색가공학회지
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• 제19권6호
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• pp.35-38
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• 2007

FTriphenylamine dye compound having diheteryl moiety was synthesized and its photoluminescent property was investigated. Organic luminescent materials have received great attentions due to potential application subjects onto full color image displays. In this context, the dye (III) for light emitting materials was synthesized using 2-(4-amino-2-hydroxyphenyl)benzoxazole (I) and 4,4'-diformyltriphenylamine (II). It is well known that the amino groups of compound (I) react with carbonyl groups, especially an aldehyde, to afford azomethine linkages. The dye shows bulish-green fluorescence property, which is anticipated for the light-emitting material for display devices. In this context, our aim is to synthesize diheteryl-substituted triphenylamine fluorescent dye as an emitting material. The spectroscopic characteristics and the fluorescent properties of this dye molecule were examined and determined.

• KSBB Journal
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• 제20권2호
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• pp.76-83
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• 2005

Lactic acid bacteria were isolated from pig feces for probiotics. The six isolated strains were identified as Lactobacillus paracasei (Lp), Lactobacillus fermentum (Lf), Lactobacillus brevis (Lb), Lactobacillus plantarum (P1 , P2), and Pediococcus pentosaceus (P3) by its sugar utilization, morphological and physiological characteristics. Pl was showed largest antibacterial inhibition zone among the isolated strains. It was against Salmonella gallinarum 25mm, E. coli 20.5mm, Staphylococcus aures 24mm, and Pseudomonas aeruginosa 28mm by inhibitory zone, respectively. Lf was showed hyper acid tolerance, $80\%$ survival rate for 40 minutes, and P1, Lb showed hyper bile tolerance, $408\%,\;283\%$ survival rate for 9 hrs, respectively. Therefore the Lf, P1, and P2 strains were expected to probiotics.