• Journal of Korean Association for Spatial Structures
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• v.9 no.3
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• pp.49-58
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• 2009

This paper is to draw basic data for the revitalization of the sustainable buildings and the improvement of sustainable building design technology in Korea by analysing the design techniques of sustainable building and the application of the techniques applied to the large volume buildings through the study of foreign cases. This study introduces the design elements of sustainable building applied to the two winter sports stadia and one convention centre which have recently completed for the 2010 Winter Olympics in Canada and analyses the design techniques of sustainable building by the lists of LEED Green Building Rating System as well.

• Hwankyungkyoyuk
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• v.25 no.1
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• pp.89-104
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• 2012

This study analyzed content on education for sustainable development in middle school science curriculum of $6^{th}$, $7^{th}$, 2007-revised and 2009-revised. Analyses criteria were developed based on literature reviews. This study developed 8 criteria such as health, climate change, urbanization and rural development, water, biodiversity and ecosystem, energy, disaster reduction and management. The results showed that 6th middle school science curriculum has 4 criteria, $7^{th}$ has 2 criteria, 2007-revised has 8 criteria, and 2009-revised has 7 criteria. This study suggests the need for developing systemized teaching material on education for sustainable development that can be integrated in the science curriculum by pursuing the following tasks: First, the goal of education for sustainable development and its need should be stated in the science curriculum. Second, the class content, themes, objectives, teaching-learning programs on education for sustainable development should be produced. Third, within science curriculum, the content should deal with perspectives and topics, and learning goal must pursue value education.

• Transactions of the Korean hydrogen and new energy society
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• v.16 no.3
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• pp.238-243
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• 2005

Mg and Mg-based alloys are most important hydrogen storage materials. It is a lightweight and low-cost materials with high hydrogen storage capacity. However, the formation of hydride at high temperature, the deterioration effect, the hydriding and dehydriding kinetics are bad factor for application. In this study, Mg and Ni have been produced by hydrogen induced mechanical alloying(HIMA) process. The raw materials, Mg(purity 99.9%) chip and Ni(purity 99.95%) chip was prepared by using a planetary ball mill apparatus(FRITSCH pulverisette 5). The balls to chips mass ratio(BCR) are 30:1. The hydrogen pressure induced 2.0MPa and milling times were 12, 24, 48, 72, 96 hours with a rotating speed of 200rpm. X-ray diffraction(XRD) analysis was made to characterize the crystallite size and misfit strain. The crystallite size measured by laser particle size analysis(PSA). Microstructure changes were investigated by scanning electron microscopy(SEM) and the transmission electron microscopy(TEM). The hydrogen storage properties were evaluated by using an Sivert's type automatic pressure-composition-therm(PCT) apparatus.

• Journal of Fisheries and Marine Sciences Education
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• v.27 no.5
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• pp.1236-1251
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• 2015

This study examined understanding and attitude of sustainable development(SD) of 38 college students in a nuclear power plant construction after education for sustainable development(ESD) through panel discussion. The results were as follows: First, after lesson 66% of students were expected that SD is possible if scientific technology is developed and a frugal life for the protection of environment is carried out. However, the remaining students regarded SD as an ideal concept, because they thought it is not possible to pursue environmental sustainability and socio-economic development simultaneously. Second, students' opinions in the evaluation of constructing a nuclear power plant in three aspects(environment, society and economy) before and after panel discussion were changed as follows; 1) After panel discussion, the objectors increased to 21% in economic evaluation, while the supporters increased to 11% in environmental evaluation. 2) Students majoring in engineering or natural sciences changed their opinions to agree in environmental evaluation because they considered a nuclear power plant safe and eco-energy. However students majoring in social science/business or liberal arts/arts changed their opinions to disagree in economic evaluation because they considered a nuclear power plant as high-cost energy when assessing danger-accidents cost, public consensus cost, operation and maintenance cost, and waste disposal cost. 3) This change of decision-making in students majoring in social science/business or liberal arts/arts after panel discussion was statistically significant(p<0.05). Implications of panel discussion as a teaching and learning method in ESD are also discussed.

• Hwankyungkyoyuk
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• v.20 no.1
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• pp.28-41
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• 2007

Current environmental education at elementary school is demanded to be changed into 'Sustainable Development', Therefore, we should find a new program to reflect appropriateness and diversity of environmental education at elementary school for 'Sustainable Development'. The result of analysing textbooks and the realities in environmental education at elementary school is as follows, First, when we analysed the contents of the textbook in environmental education, the reflecting rate was high in 'natural environment' and 'sound consumption', compared with in 'artificial environment', 'resource and energy' and 'health and environment'. Second, we realized the necessity for 'environmental education' complementary to 'Sustainable Development'. That is because the analysis showed the lack for the activity for approaching and solving environmental problems with 'artificial environment', 'resource and energy' and 'health and environment'. Third, the analysis also showed the deficiency in the reflection of 'environmental education' contents for maintaining healthful environment through improving the quality of life. Current textbook didn't deal with very important elements of 'environmental education' - the Quality of indoor atmosphere, harmful matter, safe things to eat, noise, stench, etc. For those reasons, it is necessary to reconstruct the realm and the contents of 'environmental education' for 'Sustainable Development' appropriate to elementary school. We require a new curriculum and textbook to cover diverse' environmental education' as well.

• Journal of Forest and Environmental Science
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• v.20 no.1
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• pp.110-130
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• 2004

This study aims to study the definition and characteristics of forest biomass as an alternative energy and to estimate the energy potential and feasibility of forest biomass utilization in domestic. Especially, significant attention is given to woody biomass such as forest residue, thinning log, etc. due to their renewable, sustainable and abundant properties. The results were summarized as follows. The utilization of these forest biomass could play an important role to activate the forest industry and increase the public benefit functions of forest, but more attention on their utilization is required and how they can be utilize more efficiently is the new task assigned to our forestry for sustainable forest management.

• 한국신재생에너지학회:학술대회논문집
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• 2007.06a
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• pp.747-752
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• 2007

경제적 측면에서 본다면 에너지는 생산과 소비에서 매우 큰 비중을 차지함과 동시에 다른 유형의 상품과 대체 가능성이 높지 않다는 점에 그 중요성이 있다. 에너지시장에 대한 정부개입의 필요성은 자원의 고갈전망이 제시되고 두 차례 석유위기가 발발한 1970년대부터 등장하기 시작하였다. 이러한 일련의 인식변화는 에너지부문에 대해 다양한 형태의 정부개입이 시작되는 계기가 되었다. 에너지시스템에서 발견되는 이러한 일련의 시장실패는 정부개입의 정당성을 확고하게 하는 동시에 정책 운영 자체를 복잡하고 어렵하게 하는 요인이 되고 있다. 에너지정책의 운용이 어려운 이유는 에너지부문에서 발생하는 외부효과가 한 종류가 아니라는 점이다. 신재생에너지의 장점과 매력은 이처럼 복잡한 시장실패를 근본적으로 해결할 수 있다는 잠재력에 있다. 하지만 개발노력이 본격화 된지 30년이 넘었음에도 불구하고 2001년 현재 신재생에너지가 IEA 국가의 TPES에서 차지하는 비중은 5.53%에 불과하다. 다양한 장점에도 불구하고 신재생에너지 기술의 개발과 보급이 저조한 가장 큰 이유는 현재의 에너지시장 상황에서 기술의 경제성이 확보되지 않기 때문이다. 신재생에너지의 장점에 대한 강조와 개발의 필요성은 더 이상 정책의 핵심주제가 아니다. 현 시점에서 정책운영의 가장 큰 이슈는 기술개발과 보급에 대한 중장기적인 전략의 수립, 이른바 '정책의 효율성' 이다. 본 논문은 신재생에너지의 이용 전반에 걸쳐 등장하는 다양한 지속가능성 이슈를 살펴보고 국내 여건에 부합하는 기술개발 및 보급방안을 제시하고자 한다.

• Journal of Microbiology and Biotechnology
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• v.19 no.8
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• pp.845-850
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• 2009

Bioethanol derived from lignocellulosic biomass has the potential to replace gasoline. Cellulose is naturally recalcitrant to enzymatic attack, and it also surrounded by the matrix of xylan and lignin, which enhances the recalcitrance. Therefore, lignocellulosic materials must be pretreated to make the cellulose easily degraded into sugars and further fermented to ethanol. In this work, hydrothermal pretreatment on corn stover at $195^{\circ}C$ for 15 min with and without lower concentration of formic acid was compared in terms of sugar recoveries and ethanol fermentation. For pretreatment with formic acid, the overall glucan recovery was 89% and pretreatment without formic acid yielded the recovery of 94%. Compared with glucan, xylan was more sensitive to the pretreatment condition. The lowest xylan recovery of 55% was obtained after pretreatment with formic acid and the highest of 75% found following pretreatment without formic acid. Toxicity tests of liquor parts showed that there were no inhibitions found for both pretreatment conditions. After simultaneous saccharification and fermentation (SSF) of the pretreated corn stover with Baker's yeast, the highest ethanol yield of 76.5% of the theoretical was observed from corn stover pretreated at $195^{\circ}C$ for 15 min with formic acid.

• Architectural research
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• v.14 no.4
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• pp.117-124
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• 2012

High rise office buildings represent one of the most energy-intensive architectural typologies. The growth of urban population necessitates sustainable high rise towers that lessen environmental impacts and energy consumption. Among various sustainable strategies, the integrated design is long known to be an important process that has great impact on building's sustainability. The framework for this paper is based on the case study of integrated towers that are located in different climate zones. The paper specifically addresses to what extent climate conditions influence the design of a high rise building and what kinds of the climate integrated design has been implemented. Qualitative case studies were carried out using published data and architectural drawing set. The technical work presented in the paper is based on computer simulation that examines the insolation analysis using hourly recorded weather data. The analysis results revealed that the site and building envelope integration and the site and building service systems have shown the most frequently employed in the integrated towers through the implementation of renewable resource integration, high performance envelopes and sustainable building service systems. Internal comfort and further energy saving in the integrated towers are offered through an automatic building management system. Due to the dynamic climate conditions, integration of building systems requires a sophisticated approach to building sustainability.

• Earthquakes and Structures
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• v.18 no.1
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• pp.57-72
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• 2020

This paper presents the results of a monodirectional shaking table test on a full-scale unreinforced masonry cross vault characterized by asymmetric boundary conditions. The specimen represents a vault of the mosque of Dey in Algiers (Algeria), reproducing in detail the mechanical characteristics of masonry, and the constructive details including the presence of some peculiar wooden logs placed within the vault's abutments. The vault was tested with and without the presence of two steel bars which connect two opposite sides of the vault. The dynamic behaviour of both the vault's configurations were studied by using an incremental dynamic analysis up to the collapse of the vault without the steel bars. The use of an innovative high-resolution 3D optical system allowed measure displacement data of the cross vault during the shake table tests. The experimental results were analysed in terms of evolution of damage mechanisms, and in-plane and out-of-plane deformations. Moreover, the dynamic properties of the structure were investigated by means of an experimental modal analysis.