• 반도체디스플레이기술학회지
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• 제23권1호
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• pp.12-18
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• 2024

The accelerated pace of climate crisis due to continuous industrialization and greenhouse gas emissions necessitates sustainable solutions that simultaneously address mitigation and adaptation to climate change. Naturebased Solutions (NbS) have gained prominence as viable approaches, with Green Infrastructure being a representative NbS. Green Infrastructure involves securing green spaces within urban areas, providing diverse climate adaptation functions such as removal of various air pollutants, carbon sequestration, and isolation. The proliferation of Green Infrastructure is influenced by the quantification of improvement effects related to various projects. To support decision-making by assessing the climate vulnerability of Green Infrastructure, the U.S. Department of Agriculture (USDA) has developed i-Tree Tools. This study proposes a comprehensive evaluation approach for climate change adaptation types by quantifying the climate adaptation performance of urban Green Infrastructure. Using i-Tree Canopy, the analysis focuses on five urban green spaces covering more than 30 hectares, considering the tree ratio relative to the total area. The evaluation encompasses aspects of thermal environment, aquatic environment, and atmospheric environment to assess the overall eco-friendliness in terms of climate change adaptation. The results indicate that an increase in the tree ratio correlates with improved eco-friendliness in terms of thermal, aquatic, and atmospheric environments. In particular, it is necessary to prioritize consideration of the water environment sector in order to realize climate change adaptive green infrastructure, such as increasing green space in urban areas, as it has been confirmed that four out of five target sites are specialized in improving the water environment.

• 한국작물학회지
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• 제40권4호
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• pp.518-524
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• 1995

국산 녹차의 채엽시기 및 제차법에 따라 회분, 조지방 및 무기성분 등 일반성분의 변화를 분석한 본 연구의 결과는 다음과 같았다. 채엽기의 신엽의 엽면적은 다엽(평균 7.23$cm^2$)이 봉산리 다엽(평균 6.93$cm^2$)보다 컸으며 엽면적의 변화폭은 2번 채엽기와 3번 채엽기 사이에 봉산리, 부춘리 각각 2.74$cm^2$에서 7.98$cm^2$, 3.10$cm^2$에서 8.23$cm^2$로 가장 컸다. 건물량은 봉산리 평균 26.3%, 부춘리 평균 26.6%이었으며 채엽기에 따라 일정한 경향은 증감을 보이지 않았다. 녹차의 일반성분 중 수분 및 회분 함량은 봉산리 평균 5.6, 6.1%, 부춘리 평균 6.2, 5.8%이었다. 총당함량 및 조지방은 봉산리 평균 4.6, 2.8%, 부춘리 평균 2.8, 2.2%이었으며 후기채엽기에 다소 높은 양을 보였다. 총질소량 및 수용성 단백질은 봉산리 평균 5.1, 1.08%, 부춘리 평균 5.7, 1.02%이었으며 총질소량은 후기채엽기에 감소하였다. 가용성 고형분은 봉산리 평균 33.1%, 부춘리 평균 35.2%이었으며 봉산리의 경우 후기채엽기에 감소를 보였다. 무기성분은 봉산리 평균 2.557%, 부춘리 평균 2.338%, 비타민 C, 비타민 E 및 비타민 A 함량은 각각 봉산리 평균 413, 71.8mg%, 32.15IU, 부춘리 평균 311, 52.3mg%, 25.68IU이었으며 채엽기에 따라 비타민 C와 비타민 E는 후기채엽기에 증가를 보였다. 재차시 증차법 및 부초법 처리에 의한 다엽의 일반성분의 변화는 가용성 고형분함량은 증차법 평균 0.111%, 부초법 평균 0.086% 증가하였으며 조지방은 증차법 평균 0.125%, 부초법 평균 0.241% 감소하였고, 총질소는 증차법 평균 0.019%, 부초법 평균 0.036%, 수용성 단백질은 증차법 평균 0.125%, 부초법 평균 0.078% 증가를 보였다.

• 한국전산유체공학회지
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• 제20권2호
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• pp.96-102
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• 2015

In this study, the green water phenomena on rectangular shaped structure is numerically simulated by STAR-CCM+ to investigate the flow pattern including the velocity profiles in bubbly water flow. 5 phases of the formation of green water in front of and over the rectangular shaped structure is simulated at the design condition which is scaled down by 1:125 from FPSO operating in GOM. All numerical results are compared with the experimental results performed in a two dimensional wave flume. The water deformation due to the green water are obtained by the high speed CCD camera with employing the shadow graphy technique, which is allowed to take the bubbly water flow into images. A series of image taken by shadow graphy technique is analyzed with MQD method to calculate the velocity in bubbly water flow.

• 한국세라믹학회지
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• 제46권6호
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• pp.627-632
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• 2009

Formaldehyde emissions from the construct was harmful to human. Diatomite, bentonite and zeolite were used as porous materials for fabricating panels. Formaldehyde adsorption and physical characteristics of porous materials were investigated and hydrothermal method was applied to fabricate panels. Formaldehyde adsorption contents of panels with porous materials were higher than that of panel without porous materials. The panels with Cheolwon diatomite and Pohang zeolite showed excellent characteristics of Formaldehyde adsorption. These characteristics were caused by higher surface area and pore volume of porous materials. Formaldehyde adsorption contents were influenced by surface area and pore volume of panels. Correlation coefficient between surface area and Formaldehyde adsorption content of panels was 0.87. The panels with porous materials had higher strength than that without porous materials because of bridging role particles.

• Korean Chemical Engineering Research
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• 제53권3호
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• pp.327-332
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• 2015

A large amount of dye wastewater poses a threat to environmental safety. Disperse blue, an anthraquinone dye that is widely used in textile dyes, is difficult to degrade in wastewater. In this work, one fungus was screened according to the decolorization rate of disperse blue. The fungus was identified and named Aspergillus XJ-2 on the basis of its morphological characteristics and 18s rDNA. Response surface method was used to optimize culture conditions for A. XJ-2. The optimum values of obtained responses were as follows: temperature, $35^{\circ}C$; pH, 5.2; carbon-to-nitrogen ratio, 30:5.5; and rotation ratio, $175r{\cdot}min^{-1}$. Under optimized conditions, the decolorization rate of A. XJ-2 was up to 94.8% in 48 h.

• 한국식품조리과학회지
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• 제21권6호통권90호
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• pp.936-941
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• 2005

녹차 잎을 건조 분말하여 래디칼 소거기능을 추출하는 공정으로 순환 이산화탄소유체추출기를 활용할 때의 추출 최적조건을 구하였다. 건조한 녹차 잎의 분말사이즈는 80/100 mesh로 하고, 추출 압력과 온도를 각각 125 kgf 및 $25^{\circ}C$로 12시간 추출한 경우 가장 추출효율이 좋았다. 또한 용매를 열수추출과 에탄을 농도 를 달리한 추출 방법으로 나누어 래디칼 소거기능을 추출하였다. 그 결과, 에탄올 $95\%$농도에서 추출한 경우 가장 효율이 높았으며, 온도는 $100^{\circ}C$로 30분 추출이 최적 조건이었다. 각 추출 방법에 따른 추출 수율과 안정성을 비교한 결과, 이산화탄소유체를 이용한 녹차 래디칼 소거기능 추출 공정이 열수나 에탄올에 비하여 각각 2.8배 및 1.87배 수율이 높았으며, 안정성 실험에서도 활성의 소실이 거의 없었다.

• Current Photovoltaic Research
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• 제11권3호
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• pp.75-78
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• 2023

Recently, the installation of photovoltaic modules in urban areas has been increasing. In particular, the demand for solar modules installed in a limited space is increasing. However, since the crystalline silicon solar module's size is proportional to the solar cell's size, it is difficult to manufacture a module that can be installed in a limited area. In this study, we fabricated a solar module with a shingled design that can control horizontal and vertical width using a bi-directional laser scribing method. We fabricated a string cell with a width of 1/5 compared to the existing shingled design string cells using a bi-directional laser scribing method, and we fabricated a solar module by connecting three strings in parallel. Finally, we achieved a conversion power of 5.521 W at a 103 mm × 320 mm area.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.135.2-135.2
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• 2011

The goal of this study is the derivation of priority for business in the areas of green energy technologies. In this paper, we calculated the importance weights of impact factors using the AHP (Analytic Hierarchy Process) method in order to derivation of priority to the green energy technologies business. AHP is a useful method for evaluating multi-criteria decision making problems. To apply the AHP method, specialists for the assessment have been identified by using the concept of 'plan, do, see' and the decision-making hierarchy was established. We selected 5 criteria and 16 sub-criteria for impact factors by brainstorming. According to the result in this study, the most important impact factor is the possibility of commercialization, the second is the possibility of developing the fundamental technology, and the third is the possibility of convergence technology.

• Environmental Engineering Research
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• 제17권3호
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• pp.151-156
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• 2012

This research described the magnetic method for the rapid removal of green algae in water. We modified the pH, cation concentration, and magnetic powder concentration to discover the best removal performance. In order to rapidly remove green algae from water, we added magnetic powder and chitosan into algae water to make a magnetic substance and this was extracted by a strong neodymium magnet. The optimized conditions were pH of 6.5-7.5, chitosan concentration of 10 mg/L, and magnetite powder concentration of less than 0.05%. A higher removing rate was observed when a higher amount of magnetite or chitosan was used, but the total amounts of phosphorus or nitrogen were not decreased.

• Journal of Electrical Engineering and Technology
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• 제12권4호
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• pp.1600-1604
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• 2017

A new Complex Image Method based on Genetic Algorithm (GA) is proposed to calculate the Green's functions of CPW (coplanar waveguide)-type microwave components and antennas. The closed-forms of the spectral-domain integrals are obtained by the GA, avoiding the conventional procedures of the tedious linear algebra and the sampling conditions sensitive to the complex-variable sampling paths adopted in the Prony's and GPOF methods. The proposed method is compared with the numerical Sommerfeld Integral, which results in good agreement.