• Title/Summary/Keyword: Green Star

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Sustainability Indices (=Green Star) for Microbial Fuel Cell (미생물 연료전지 영속발전 지표개발)

  • Song, Ha-Geun;KOO, Ja-Kong
    • Journal of the Korea Organic Resources Recycling Association
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    • v.23 no.2
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    • pp.47-52
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    • 2015
  • A microbial fuel cell (MFC) is a device that can be obtained electricity from a variety of organic through the catalytic reaction of the microorganism. The MFC can be applied to various fields, and research is required to promote the performance of the microbial fuel cell for commercialization. The lower performance of an MFC is due to oxygen reduction at the cathode and the longer time of microbial degradation at anode. The MFC amount of power is sufficient but, in consideration of many factors, as a renewable energy, now commonly power density as compared to Nafion117 it is an ion exchange membrane used is PP (Poly Propylene) from 80 to about 11 fold higher, while reducing the cost to process wastewater is changed to a microporous non-woven fabric of a low cost, it may be energy-friendly environment to generate electricity. All waste, in that it can act as a bait for microorganisms, sustainability of the microbial fuel cell is limitless. The latest research on the optimization and performance of the operating parameters are surveyed and through the SSaM-GG(Smart, Shared, and Mutual- Green Growth) or GG-SSaM(Green Growth - Smart, Shared, and Mutual) as the concept of sustainable development in MFC, the middle indices are developed in this study.

Profile, Facilities, and Options for Collaboration with Steward Observatory

  • Green, Richard F.
    • The Bulletin of The Korean Astronomical Society
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    • v.40 no.1
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    • pp.41.2-41.2
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    • 2015
  • Steward Observatory has a rich and diverse program of investigations, with significant groups working on star and planet formation and astrobiology, galaxy and quasar formation and evolution, technology for adaptive optics and interferometry, computational astrophysics, and effectiveness of educational practice. To support this work, Steward operates and offers a range of observational and other facilities, including the Large Binocular Telescope, the MMT, the Magellan Telescopes, the Arizona Radio Observatory, and a suite of 1- and 2-m class telescopes. A special opportunity for IR astronomy exists with Arizona now running UKIRT. Steward Observatory astronomers would welcome the opportunity to form genuine scientific collaborations that are mutually beneficial for high-impact projects and improving the observing facilities.

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Escape of LyC and Lyα Photons from Simulated Turbulent Clouds

  • Kimm, Taysun;Blaizot, Jeremy;Garel, Thibault;Michel-Dansac, Leo;Katz, Harley;Rosdahl, Joakim;Verhamme, Anne;Haehnelt, Martin
    • The Bulletin of The Korean Astronomical Society
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    • v.44 no.1
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    • pp.73.2-73.2
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    • 2019
  • Understanding how ionizing radiation propagates from molecular clouds to the intergalactic space is the key to the study of reionization and the emergence of $Ly{\alpha}$ emission from galaxies. In this contribution, I will present our new efforts to better understand the escape of UV photons from turbulent clouds with different masses, star formation efficiencies, and spectral energy distributions using radiation-hydrodynamic simulations. I will also show predicted Lya profiles from turbulent clouds and discuss a few interesting differences identified when compared with the properties of the local green pea galaxies.

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Due to climate change policies Researches by the role of local government (기후변화 대응 지방자치단체의 역할에 따른 정책 연구)

  • Bae, Ki-Tae;Ree, Sang-Bok
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2010.04a
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    • pp.474-482
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    • 2010
  • The Research of local governments in addressing climate change policy formulation and enforcement role in the formulation of local governments, and faithful to the role of local governments when addressing climate change to policy issues and is aimed to provide direction. The role of local governments' Star Statement by looking at best practices, through which more realistic and effective climate change response measures would be able to set aside. Local party organizations in addressing climate change and understanding the role and establishment and enforcement of the policy must be balanced community and residents more comfortable and be able to provide a comfortable life.

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Five Indices of SSaM-GG(=Smart, Shared, and Mutual- Green Growth) for Sustainable Development (지속가능/영속(永續)발전을 위한 지속성/안녕(安寧)성의 5대 지표(=SSaM-GG) 개발)

  • Koo, Ja-Kong;Park, Sang Ryul;Lee, Seul Ki
    • Journal of the Korea Organic Resources Recycling Association
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    • v.20 no.4
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    • pp.127-133
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    • 2012
  • The 'SSaM-GG'(=Smart, Shared, and Mutual- Green Growth) as the five bottom lines for sustainable development is developed and suggested. Because the name of Green Growth alone is not sufficient for clear conceptualization, implementation. and etc. For the global harmonized usage & application, the Eastern-Western conceptual fusion has been performed, and verified for more than 12 years on the worldwide successes and failures.

Technology Competitiveness Analysis of New & Renewable Energy in Major Countries (주요국의 신재생에너지 분야 기술경쟁력 분석 연구)

  • Ha, Su-Jin;Choi, Ji-Hyeok;Oh, Sang Jin
    • New & Renewable Energy
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    • v.18 no.3
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    • pp.72-84
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    • 2022
  • As the threat of climate change escalates, 'net-zero' has become a priority for the international community, and the use of new and renewable energy sources is expected to play a significant role in reaching international carbon neutrality. Here, we evaluate technological competitiveness in terms of implementation and technology by analyzing scientific literature and patents in the new and renewable energy fields of five major countries. For the past 10 years (2009-2019), the most active areas of new and renewable energy research and development have been solar power, wind power, waste, and fuel cells. China is the forerunner in implementation, whereas the United States has the most advanced technology. Portfolio analysis revealed that Korea's fuel cell, the United States' bioenergy, China's waste, Japan's solar and fuel cell, and the European Union's wind power have shown to be in Star Field respectively. Technological competitiveness analysis found that Korea is lagging behind other countries in the new and renewable energy sector, and needs to set a new direction for future carbon-neutral research and development, investment, and policy.

A study for roll damping performance of a platform supply vessel with or without bilge keel using CFD (전산유체역학을 이용한 해양작업지원선의 빌지킬 유무에 따른 횡동요 성능에 관한 연구)

  • Seok, Jun;Kim, Sung-Yong;Yang, Young-Jun;Jin, Song-Han;Park, Jong-Chun
    • Journal of Advanced Marine Engineering and Technology
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    • v.40 no.9
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    • pp.791-798
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    • 2016
  • In this study, numerical simulations on the effects of bilge keel on roll motion were conducted. The numerical simulations were performed on a 110 m class PSV using the commercial viscous flow analysis software Star-CCM+. Before conducting the study on the 110 m class PSV, an additional simulation of DTMB 5512 was performed and compared with the experimental results to validate the feasibility of the numerical simulation. In the simulation on PSV, a nondimensional damping coefficient was calculated using a free roll decay simulation, and the response amplitude operator (RAO) for the roll motion was calculated with a nondimensional damping coefficient at two conditions (with/without bilge keel).

A Comparative Studies on the growth Characteristics and Feed Components of Sorghum × Sudangrass hybrids at Paddy Field Cultivation (수수×수단그라스 교잡종 논토양 재배시 품종별 생육특성 및 사료가치 비교 연구)

  • Jeon, Byong-Tae;Moon, Sang-Ho;Lee, Sang-Moo
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.32 no.1
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    • pp.29-38
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    • 2012
  • This study was carried out to compare the agronomic characteristics, forage yield, and feed value of nine sorghum ${\times}$ sudangrass hybrids at paddy field cultivation. The nine recommended sorghum ${\times}$ sudangrass hybrids used in this study were P877F, Cow pow, Turbo gold, Maxi graze, Jumbo, G7, Sweet home, Honey chew BMR and Green star. Plant height, leaf number, stem diameter, and stem hardness were higher in Jumbo than other varieties (P<0.01). Sugar content (brix) was higher in order of P877F > Sweet home > maxi graze > Green star > Cow pow > G7 (P<0.01). Fresh (86,199kg/ha) and dry matter yield (16,206 kg/ha) of Jumbo were higher than other varieties (P<0.01). Crude protein was the highest in Maxi graze (6.5%), but crude fat was the highest in Honey chew BMR as 2.1% (P<0.01). NDF and ADF of Jumbo and G7 were higher than other varieties (P<0.01). TDN was higher in order of Maxi graze > Sweet home > P877F > Honey chew BMR > Green star, but no significant differences were found among the varieties. Minerals were the highest in Cow pow (15,020.5 mg/kg), and Sweet home (6,222.6 mg/kg) was the lowest as compared to other varieties (P<0.01). Total amino acids were higher in order of Maxi graze > Sweet home > Turbo gold > Honey chew BMR > Jumbo (P<0.01). Crude protein yield and crude fat yield were the highest in Turbo gold (814.6 kg/ha) and Honey chew BMR (309.8kg/ha), respectively (P<0.01). Mineral yield was the highest in Cow pow as 207.6 kg/ha (P<0.01). Amino acid yield (592.2 kg/ha) and TDN yield (10,194 kg/ha) were the highest in Sweet home. Based on the above results, sorghum ${\times}$ sudangrass hybrid varieties should be selected on the basis of the purpose of use. Because, each varieties showed various growth characteristics and nutrition yield (protein, fat, mineral, amino acid, TDN).

The extraction and application of the color chip represented in the work of Picasso according to his muses (피카소의 작품에 나타난 뮤즈별 컬러 칩 도출과 적용)

  • Lee, Keum Hee
    • The Research Journal of the Costume Culture
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    • v.23 no.2
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    • pp.193-212
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    • 2015
  • The purpose of this study is to analyze the characters and images of Picasso's muses, to extract the color chip from the works of Picasso, and to apply these results to fashion design. The study includes a literature review, an analysis of visual materials. The results are as follows. Fernande, who was cheerful and voluptuous, was depicted with pink-brown, a few browns, grey, black, white, and green and represents an ethnic and elegant image. Eva, a star-crossed lover, was depicted with a few browns, black, and pale-yellow and represents a gorgeous and natural image. Olga, who was jealous and sickly wife, was depicted with a few blues, browns and neutral-color and represents a classic and dandy image. Th${\acute{e}}$r${\grave{e}}$se, who was innocent and sweet, was depicted with the bright and pastel colors of red, green, violet, and yellow and of white, blue, brown, and black and represents a romantic, pretty, and casual image. Dora, who was intellectually and emotionally- challenging, was depicted with the strong colors of red, yellow, green, and blue, which are in contrast to black and also to white, grey and brown and represents a wild and dynamic image. Gilot, who was strong-willed and prideful, was depicted with the symbolic color of green, a color contrasting with black and white, grey, and pale brown and represents a clear, cool casual and modern image. Jacqueline, the self-giving and reclusive wife, was depicted with deep red, blue, green, black, white, dark brown, grey represents a formal, dandy, and chic image.

Thermosensitive Block Copolymers Consisting of Poly(N-isopropylacrylamide) and Star Shape Oligo(ethylene oxide)

  • Lee, Seung-Cheol;Chang, Ji-Young
    • Bulletin of the Korean Chemical Society
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    • v.30 no.7
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    • pp.1521-1525
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    • 2009
  • Thermosensitive block copolymers of ethylene oxide and N-isopropylacrylamide (NIPAM) were synthesized. A five armed star shape oligo(ethylene oxide) initiator with a cyclotriphosphazene core was prepared and used for the atom transfer radical polymerization (ATRP) of NIPAM. The lower critical solution temperatures (LCSTs) of the copolymers were 36 to 46 ${^{\circ}C}$, higher than that of PNIPAM (32 ${^{\circ}C}$), depending on their molecular weights. The copolymers were soluble in water below the LCSTs but formed micelles above the LCSTs. The thermosensitive micellization behaviors of the polymers were investigated by fluorescence spectroscopy. With increasing the temperature of an aqueous solution of P2 and pyrene above the LCST, the peak of 333 nm red-shifted to appear around 339 nm and its intensity increased significantly, indicating the micelle formation. The transfer of pyrene into the micelles was also confirmed by a confocal laser scanning microscope. The fluorescence image obtained from P2 in an aqueous pyrene solution exhibited a green emission resulting from the pyrene transferred into the micelles. Salt effects on the solubility of the copolymers in an aqueous solution were investigated. The LCST of P2 decreased sharply as the concentration of sodium chloride increased, while decreased slowly with potassium chloride.