• 대한수학회보
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• 제55권5호
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• pp.1317-1332
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• 2018

In this paper, we introduce the D-ratio of a rational map $f:{\mathbb{P}}^n{\dashrightarrow}{\mathbb{P}}^n$, defined over ${\bar{\mathbb{Q}}}$, whose indeterminacy locus is contained in a hyperplane H on ${\mathbb{P}}^n$. The D-ratio r(f; ${\bar{V}}$) characterizes endomorphisms and provides a useful height inequality on ${\mathbb{P}}^n({\bar{\mathbb{Q}}}){\backslash}H$. We also provide a dynamical application: preperiodic points of dynamical systems of small D-ratio are of bounded height.

• 한국축산식품학회지
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• 제26권4호
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• pp.447-453
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• 2006

This study was conducted to investigate the effects of $Megazone^{(R)}$ (a mineral mix) supplementation on growth performance, nutrients digestibility, blood characteristics, meat quality and carcass traits in weaning-to-finishing pigs. A total of 48 crossbred $(Landrace{\times}Yorkshire{\times}Duroc)$ pigs with initial body weight (BW) of $4.46{\pm}0.18kg$ were used in a 21 wks trial. Pigs were blocked by weight and allotted to two dietary treatments in a completly randomized design. There were 6 pens per treatment. Dietary treatments included: 1) Control (CON: basal diet) and 2) MT (basal diet+0.8% $Megazone^{(R)}$). Through the entire experimental period, there were no effects of dietary $Megazone^{(R)}$ supplementation on growth performance nutrients digestibility, blood characteristics and meat quality traits (p>0.05). Market weight and backfat thickness also had no differences between the two treatments (p>0.05). However, carcass weight and carcass ratio in MT treatment were improved significantly compared with CON treatment (p<0.05). In conclusion, supplmentation of $Megazone^{(R)}$ can increase carcass weight and carcass ratio in weaning-to-finishing pigs, however, it has no effects on growth performance, nutrients digestibility, blood characteristics and meat quality traits.

• Journal of Information Science Theory and Practice
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• 제2권4호
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• pp.20-30
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• 2014

This study examines the foremost concerns related to most noted research performance index. The most popular and widely acceptable h-index underestimates the highly visible scientist, the middle order group, due to citation distribution issues. The study addresses this issue and uses 'Corrected Quality Ratio' (CQ) to check the implicit underpinnings as evident in h-index. CQ helps to incorporate the aspects of a good research performance indicator. This simple revision performs more intimately and logically to gauge the broader research impact for all groups and highly visible scientists with less statistical error.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.46-49
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• 2002

Recent trends of low-temperature polycrystalline Si (LTPS) TFT technologies are presented. Characteristics of LTPS TFT processes are compared with those of a-Si TFT's. In order to compete with well-established a-Si TFT-LCD technology, LTPS process has to be as simple as possible. One of the most critical processes, recrystallization of a-Si thin films, could be the process for the differentiation of LTPS technology. Along with these technical reviews, a recent development of the 5.0-inch LTPS TFT-LCD is presented. In order to achieve high-performance display characteristics and save the power consumption, the transflective mode is adopted. The 5.0-inch display with 186 pixel-per-inch, high-resolution LCD was measured to be 10% for the reflectance and 70:1 for the contrast ratio. This display is designed for a high information content hand-held PC (HHPC) application.

• 한국환경보건학회지
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• 제12권1호
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• pp.1-14
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• 1986

This investigation was carried out on the study of Ferrite formation by aerial oxidation of Fe $(OH)_2$ suspension of aqueous solution containing heavy metal ions. In this study the optimum reactionary condition of the Ferrite formation in Batch reactor wa studied by aerial oxidation which are subjected to various reaction time and temperature, under the different kinds of R(2NaOH/$FeSO_4$) Values, pH, Air flow rate, and $Fe^2+/M^2+$ mole ratio. The optimum condition for the Ferrite formation in Batch reactor was such that residence Time was 90 min., Temperature $65{\circ}$C, pH 11.0, Air flow rate 2.0l/min and $Fe^{2+}/M^{2+}$ mole ratio 4.0, which was observed by X-Ray diffraction analysis. The relation R-value, pH and ORP affecting the formation of Ferrite is that the jump step in pH 11.0, when a amount of NaOH is added, is steady state to the formation of Ferrite. Effect of R-value of $FeSO_4$ and $FeCl_2$ on the formation of Ferrite in different from each other the optimum condition of the in different from each other the optimum condition of the $FeCl_2$ is R-value 0.7, pH 11.0 and the $FeSO_4$ R-value 1.2, pH 11.0.

• 한국재료학회지
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• 제4권5호
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• pp.566-573
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• 1994

연소화염법을 이용한 다이아몬드 박막합성시 기판표면온도 및 온도분포에 가장 크게 작용하는 공정변수는 탄화수소량을 결정하는 산소/아세틸렌 가스의 혼합비(R=O/sub 2/C/sub 2/H/sub 2/)이다. 본 연구에서는 혼합가스비율 변화 (R=0.87-0.98)에 따른 기판표면온도 및 온도분포를 측정하고, 이들 변수에 따른 다이아몬드 박막의 생성 및 결정형상의 변화과정을 SEM관찰, Raman 분광분석 및 X-선 회절 분석을 통해 조사하였다. 혼합가스비율의 증가에 따라 다이아몬드의 생성입자 수밀도는 감소하였고, 이와 동시에 결정형상도 (111)면과 (100)면이 혼재된 cobo octahedron형에서 octahedron인 (111)면으로 변화되었다. 한편, 기판온도증가에 따라 생성입자의 수밀도가 증가하고 성장속도도 빨라져 조대한 결정을 얻었으며, 생성된 입자형성은 (111)면애 지배적이다가 (100)결정면이 점차 많아지는 양상을 나타내었다.

• 암석학회지
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• 제27권1호
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• pp.1-15
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• 2018

미세균열의 길이와 간격의 분포를 이용하여 쥬라기 거창화강암의 결의 특성을 분석하였다. 여섯 방향의 결에 대한 길이 및 간격-누적빈도 도표를 미세균열의 길이의 밀도(${\rho}$)가 증가하는 순(($H2{\rightarrow}R1$)으로 배열하였다. 상기 두 유형의 도표의 결합을 통하여 다양한 파라미터를 추출하였다. 여섯 방향의 결에 대한 평가는 (I) 교차각(${\alpha}-{\beta}$), 지수차(${\lambda}_S-{\lambda}_L$), 선의 길이(ol 및 ll'), 길이 비(ol/os 및 ll'/sl'), 평균 길이((ss'+ll')/2), 직각삼각형의 면적(${\Delta}oaa_a^{\prime}$ 및 ${\Delta}obb_a^{\prime}$) 그리고 면적차(${\Delta}obb^{\prime}-{\Delta}oaa^{\prime}$ 및 ${\Delta}obb_a^{\prime}-{\Delta}oaa_a^{\prime}$), (II) 선의 길이(oa 및 os) 그리고 면적(${\Delta}oaa^{\prime}$), (III) 선의 길이(sl') 및 길이 비(ss'/ll') 그리고 (IV) 선의 길이(ob, ss' 및 ls') 및 면적(${\Delta}obb^{\prime}$, ${\Delta}ll^{\prime}s^{\prime}$, ${\Delta}ss^{\prime}l^{\prime}$ 및 ⏢ll'ss')과 같은 4개 그룹(I~IV)의 파라미터를 이용하여 수행하였다. 3개 결 및 3개 면에 대한 파라미터의 값 사이의 상관성 분석의 결과는 다음과 같다. 3개 결에 대한 파라미터의 값은 (I) H(3번 결, (H1 + H2)/2) < G(2번 결, (G1 + G2)/2) < R(1번 결, (R1 + R2)/2), (II) R < G < H, (III) G < H < R 및 (IV) H < G < R의 순서이다. 반면에, 3개 면에 대한 파라미터의 값은 (I) R' < G' < H', (II) H' < G' < R' 및 (III 및 IV) R' < H' < G'의 순서이다. 특히, 그룹 I 및 그룹 II에 속하는 파라미터의 값은 상호 역순을 보여준다. 결론적으로, 이러한 유형의 상관성 분석은 3개 채석면의 판별에 유용하다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.793-796
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• 2005

A structure and a design of device were developed to fabricate large-scale active matrix organic light-emitting diode (AMOLED) display with good color purity and high aperture ratio. With these technologies, we developed a full color 14.1 inch WXGA AMOLED display. For the integration of OLED on an active matrix a-Si TFT backplane, an efficient top emission OLED is essential since the TFT circuitry covers a large position of the pixel aperture. These technologies will enable up the OLED applications to larger size displays such as desktop monitors and TVs.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 춘계학술대회 논문집
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• pp.423-424
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• 2009

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2008년도 추계학술대회 논문집
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• pp.102-105
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• 2008

To investigate the evolution of deformation texture during cold rolling deformation, cold rolling process on a commercial Al-5% Mg sheet was carried out at different rolling reduction ratio. The evolution of annealing texture in cold-rolled Al-5% Mg sheet was also investigated. The evolution of recrystallization texture during annealing process strongly depends on the rolling reduction ratio before heat treatment. Visco-plastic self-consistent (VPSC) polycrystal model was used to predict r-value anisotropy of the cold-rolled and annealed Al-5% Mg sheets. The change of volume fraction for the major texture components was also analyzed.