• Journal of the Optical Society of Korea
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• 제2권2호
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• pp.58-63
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• 1998

Cross-talk effects in high-density volume holographic interconnections are investigated using perturbative iteration method of the integral form of Maxwell's wave equation. In this method, the paraxial approximation and negligence of backward scattering introduced in conventional coupled mode theory is not assumed. Interaction geometries consisting of non-coplanar light waves and multiple index gratings are studied. Arbitrary light polarization is considered. Systematic analysis of cross-talk effects due to multiple index gratings is performed in increasing level of diffraction orders corresponding to successive iterations. Some numerical examples are given for first and third order diffraction.

• Journal of Astronomy and Space Sciences
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• 제11권1호
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• pp.1-12
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• 1994

The structure of the magnetic funnel element in the intermediate polar is considered in terms of an important site for the X-ray absorption and the reemission of the X-ray as the optical light. In this paper the column density and the optical depth vary with the filling factor, which is introduced to characterize the structure of matter in the magnetic funnel element. The results of the energy dependence of the X-ray spectrum and the modulation depth of the X-ray light curve are discussed.

• Journal of Plant Biology
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• 제28권3호
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• pp.225-232
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• 1985

Intracellular localization and the developmental changes in activities of uricase and allantoinase during germination were investigated with the cotyledons of rape(Brassica napus L.) seedlings. The development anddisappearance of uricase activity took place independently of light, but allantoinase activity was increased by light. The temporal pattern of uricase activity showed that uricolysis was actively taking place in the cotyledons during their early stages of germination. While uricase can be localized in the microbody fraction isolated from crude organelle extracts of the cotyledons by density gradient centrifugation, most of the allantoinase activity found in the microbody fraction did not appear to be an integral part of the microbody.

• 한국광학회:학술대회논문집
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• 한국광학회 2007년도 하계학술발표회 논문집
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• pp.285-286
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• 2007

Current distributions according to electrode patterns in vertical structured InGaN/GaN LED (light emitting diode) were investigated quantitatively by utilizing three dimensional electrical circuit modeling method. The uniformity of the injected current density in the active layer was compared among different electrode patterns. It was found that the current uniformity was greatly dependent on the electrode pattern in vertical InGaN/GaN LEDs.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 춘계 학술논문 발표대회
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• pp.217-218
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• 2012

To prevent energy waste in buildings used heat insulator. Heat insulator materials can be classified inorganic and organic. The organic material is be toxic gas emission, when a fire occurs. And it has lower water resistance. The inorganic material is heavy and worse thermal performance than organic materials. This study focused on thermal conductivity and density of inorganic foam material for using industrial by-products materials.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 춘계학술대회 논문집
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• pp.446-451
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• 2002

Honeycomb structures have advantages in weight reduction with stiffness increment. As far as noise is concerned, however a light aluminum structure, instead of a steel frame, should have an equivalent mass density in order to maintain sound insulation performance. In this paper, an evaluation of a material effect on noise has been examined.

• Bulletin of the Korean Chemical Society
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• 제16권12호
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• pp.1173-1176
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• 1995

The explicit results of the degrees of circularity for various kinds of completely polarized light in a nonpolar fluid composed of chiral molecules are obtained with the aid of the Ornstein-Zernike form for the correlation function of density fluctuations. Then, the results are in detail discussed in two limiting cases of critical region and compared with circular intensity differences.

• 한국수산과학회지
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• 제46권2호
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• pp.195-200
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• 2013

This study investigated the effects of water temperature, photoperiod and population density on oxygen consumption (OC) in the longtooth grouper (Epinephelus bruneus). OC rate in the longtooth grouper at 15, 20, and $25^{\circ}C$ were $85.9{\pm}6.9$, $107.5{\pm}10.1$, and $164.0{\pm}19.2\;mg\;O_2\;kg^{-1}\;h^{-1}$, respectively, indicating a linear increase in OC with water temperature. Photoperiod was regulated in accordance with the light (09:00-21:00 h, L) and dark (21:00-09:00 h, D) phases of the diel cycle (12L/12D), with a water temperature of 15, 20, or $25^{\circ}C$. OC rates during the light and dark phases were $83.8{\pm}5.4$, $88.1{\pm}7.8\;mg\;O_2\;kg^{-1}\;h^{-1}$, respectively, at $15^{\circ}C$ and $111.2{\pm}12.3$ and $103.7{\pm}5.7\;mg\;O_2\;kg^{-1}\;h^{-1}$ at $20^{\circ}C$. No significant differences were observed between the light and dark phases (P > 0.05). at $25^{\circ}C$ the OC rates were $168.8{\pm}24.3$ and $159.2{\pm}11.4\;mg\;O_2\;kg^{-1}\;h^{-1}$ during the light and dark phases, respectively, indicating that OC is higher during daylight than nighttime. OC tates at 55.4, 88.4, 118.8, and 145.1 g $L^{-1}$ were $252.0{\pm}11.6$, $219.0{\pm}8.7$, $206.7{\pm}11.4$, and $208.8{\pm}11.4\;mg\;O_2\;kg^{-1}\;h^{-1}$, respectively, indicating a decrease in OC with increasing population density. However, no significant difference was observed between the values for 118.8 g $L^{-1}$ and 145.1 g $L^{-1}$ (P > 0.05).

• 한국균학회지
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• 제47권1호
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• pp.63-73
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• 2019

표고 균사체의 갈변은 균사배양체의 오염과 수분 손실을 방지하는데 매우 효과적이다. 광과 광 파장이 표고 산조701호 품종의 균사체 갈변에 미치는 영향과 갈변 균사의 특징을 이해하고자 하였다. 표고 균사체를 감자한천배지에서 암배양한 후 적색, 녹색, 청색의 색 셀로판 필터를 덥거나, 원적색(far-red), 적색, 녹색, 청색의 light emitted diode (LED)를 매일 14시간씩 40일간 비춘 후 균사배양체의 갈변 면적 비율(갈변율)과 갈변 균사의 특징을 조사하였다. 파장대 범위가 300~1,100 nm인 백색 형광등 빛은 세 가지 각각의 색 셀로판을 통과하면서 360~1,022 nm로 좁아졌고 각 파장별로 photosynthetic photon flux density (PPFD)는 42~71%가 감소하였다. 형광등 빛 처리로 균사체의 갈변율은 면적비율로 평균 64%였으나, 빛을 받지 않은 균사체의 갈변율은 5%에 지나지 않았다. 광 파장별로 표고 균사체의 갈변율은 원적색에서 0.02%. 적색에서 1.5%, 녹색에서 53.8%, 청색에서 57.3% 였다. 그리고 흰색의 미갈변 표고 균사는 세포벽이 $1{\mu}m$ 미만으로 얇고 원형질이 들어찬 생장하는 것이었다. 이에 반하여, 갈변층의 균사는 세포벽이 $2-4{\mu}m$으로 두껍고 세포 내용물이 없는 죽은 것으로 탄력이 없이 단단한 부정형의 구조체였다. 결론적으로 녹색~청색 파장의 빛으로 촉진된 표고 균사의 갈변층은 죽은 조직이지만 그 아래 내부 활력 균사체를 보호하는 중요한 기능층이었다.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2003년도 춘계 학술발표회 논문집
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• pp.191-209
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• 2003

Voices of Customers; 1. Long time operating power 2. Quick Charging 3. High power and energy density 4. Safety 5. Small and light power Technical Requirements for Delivering DMFC to Consumer's Hands; 1. MEA having tripled power density. 2. Membrane of maintaining the same protonic conductivity and near 0% cross-over when 10M or higher concentration of methanol fueling (Omitted)