• 한국물환경학회지
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• 제26권3호
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• pp.439-445
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• 2010

An emergy analysis of the main energy flows driving the economy of humans and life support systems consists of environmental energies, fuels, and imports, all expressed as solar emjoules. Total emergy use (371 E20 sej/yr) of the Western Nakdong River Basin is 97 per cent from imported sources, fuels and goods and services. Emergy flows from the environment such as rain and geological uplift flux accounted for only 2.9 percent of total emergy use. Emergy yield ratio and environment loading ratio were 1.03 and 33.27, respectively. Emergy sustainability index, a ratio of emergy yield ratio to environment loading ratio, is therefore less than one, which is indicative of highly developed consumer oriented economies. It is necessary for an efficient management of Western Nakdong River Basin to reduce pollution load basically and to restructure economic activities into an environmental friendly industrial structure depending on renewable energy and resources.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 추계 학술발표회 제20권2호
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• pp.281-284
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• 2008

최근 친환경 구조물에 대한 관심이 증대 되면서 친환경 재료인 황토에 대한 연구가 활발히 진행되고 있다. 하지만 대부분의 연구가 황토의 재료특성에 대하여 이루어지고 있으며, 구조 성능에 대한 연구는 미비한 실정이다. 또한, 활성 황토의 경우 활용 가능성이 어느 정도 규명되고 있으나, 경제성 측면에서 활용도가 낮은 것이 현실이다. 비활성 황토는 경제성 측면에서는 유리할 것으로 기대되나 재료 및 구조성능에 대해 규명되지 않고 있다. 따라서, 본 연구에서는 활성 황토와 비활성 황토가 황토 콘크리트 보의 휨 성능에 미치는 영향을 분석하였다.

• 한국철도학회논문집
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• 제9권5호
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• pp.517-523
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• 2006

The sustainable development is a key issue in the whole field of economy, culture and society, which can be accomplished by the improvement of environment. Recently, life cycle assessment(LCA) has been applied to reduce environmental impacts preliminarily by evaluating the environmental performance of a product through its life cycle. In this study, life cycle assessment was performed to analyze quantitatively the environmental impact on the interior panel of electric motor unit(EMU). As a result, the interior panel with aluminum showed the most global warming(GW), while that with phenol and plastic showed high fresh water aquatic ecotoxicity(FAET) and marine water aquatic ecotoxicity(MAET), respectively. Global warming was occurred mainly due to the emission of $CO_2$ by energy consumption. FAET and MAET were caused by the pollutants released from acid-washing and paints coating process. Therefore, an environmental-friendly EMU can be designed considering the environmental impacts of interior panel.

• 한국전자통신학회논문지
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• 제10권7호
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• pp.807-812
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• 2015

평생교육은 시대적 키워드이다. 성인학습자를 위한 친화형 교육과정 운영을 위해 전문적인 학사관리를 대학이 제공해야한다. 이를 통해 대학은 성인학습자에게 생애 단계별 평생학습을 지원하고 평생교육대학의 교육편제를 유지하면서 계속학습의 편의를 마련해야 한다. 지방자치단체는 평생학습도시 여건을 활용하여 지역경제 활성화를 유도한다. 본 논문은 K대학의 사례를 중심으로 지역의 산업체환경을 고려하여 평생학습자에게 비학위 재교육 과정으로 3D 프린팅과 CAD 전문인력 양성과정개설을 위한 정책적 운영방안을 제안하였다.

• 유통과학연구
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• 제18권11호
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• pp.23-30
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• 2020

Purpose: Increased awareness of the environment is essential, since the general health of people and the global economy is largely dependent on the health of the environment. The purpose of this study is to increase customer awareness and also to ensure that businesses enlighten their customers on how to act in an environmentally friendly manner, which can be done, for instance, through associations. Research design, data and methodology: Scant research is available regarding what elements of marketing strategy should be applied in an environmental plan to increase customer awareness. For this reason, this study suggests a specific marketing policy that conveys several strategies for practitioners who focus on successful environmental plans for their organizations. Results: The prior literature suggests that public education, mass media, campaign publications, and electronic networking, which are becoming more common today, can be used as platforms for conveying environmental messages that will increase environmental awareness among customers. Conclusions: Organizations can use health and safety training to ensure that customers are aware of the environment. Training programs by companies that point more to the environment can make customers aware of the environment and help them adopt activities that show respect to the environment.

• 드라이브 ㆍ 컨트롤
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• 제9권1호
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• pp.1-9
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• 2012

Nowadays, various researches about eco-friendly vehicles such as hybrid electric vehicle, fuel cell vehicle and electric vehicle have been actively carried out. Since most of these green cars have electric motors, the regenerative energy technology can be used to improve the fuel economy and the energy efficiency of vehicles. The regenerative brake is an energy recovery mechanism which slows a vehicle by converting its kinetic energy into electric energy, which can be either used immediately or stored until needed. This technology plays a significant role in achieving the high energy usage. However, there are some technical problems for controlling the regenerative braking and the electro-hydraulic brake during switching at transient region. In this paper, the performance simulator for fuel-cell vehicle is developed and transient response characteristics of the regenerative braking system are analyzed in the various driving situations. And the hardware-in-the-loop simulation of electro-hydraulic brake is performed to validate the transient characteristics of the regenerative braking system for fuel-cell electric vehicle.

• 한국시스템다이내믹스연구
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• 제7권1호
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• pp.147-172
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• 2006

With the purpose of long-range planning toward local/regional sustainable development, it is desired to avoid unconditional industrialization and expansion and to build an eco-oriented development strategy considering site-specific characteristics of the environment. This paper thus aims at the elaboration of a system dynamics model of a locality/region so as to understand inherent dynamics of sustainable development and to assess the effectiveness of such an eco-oriented strategy. The model thus consists of several positive and negative feedback loops that accelerate or restrict local/regional economic growth within a system boundary incorporating the environment, economy, and society. The model is moreover applied to the assessment of the effectiveness of the development plan recently established in Damyang in JeollaNamdo, Korea. It is regarded in this case to be effective for population immigration and economic prosperity to give priority to restore the bamboo ecosystem and nourish a series of eco-friendly industries based on the bamboo items developed recently. It is also to be positive to sustainable development since it enables to maintain high quality of the environment from the outset of their development steps.

• 대한안전경영과학회지
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• 제7권4호
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• pp.1-12
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• 2005

Small & medium sized company is the most efficient way of management to prevent my accident in the area of industry. Employees are more than 30 to less than 50 persons and which is liable for securing a safety manager on site, is gradually seen on the surface. Even a small company is nothing less than a dead zone from a safety since it's free from his obligation of employing a safety manager. Let us now think about the effective measures against a industrial accident by collecting, reviewing a variety of preventive measures, which is being carried out for preventing an industrial accident happening in a small company, and comparing, analyzing the effect according to the respective measures. Through this research, it's expected to contribute to both the development of small & medium sized company and our national economy with the improvement of a company's competitiveness and the accumulation of technical background by way of prevention from occurring industrial accident in a small & medium sized company, in accordance with an friendly environment of work room to protect the employee from leaving his job.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.1017-1024
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• 2009

In the past few decades, the rockfill embankment dam, which has superior workability and economy, has become a major trend. In Korea, most of the embankment dams are rockfill dams, but recently, in response to the demand for sustainable development and environmentally-friendly water resource development, the sand and gravel in streams has become a major construction material for dams, rather than the non-economic rockfill, and its application examples have also increased. In this study, a large triaxial test was performed, with construction samples of different maximum sizes, in parallel with the grading method at the 'B Dam' construction site in Korea, and the effects of the different maximum sizes on the strain of the dam construction material and on the shear strength characteristics were analyzed to provide the basic data for determining the strength characteristics of the coarse-grained materials by the maximum size.

• Computers and Concrete
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• 제6권4호
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• pp.281-303
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• 2009

The lack of safety of bridge deck structures causes frequent repair and strengthening of such structures. The repair induces great loss of economy, not only due to direct cost by repair, but also due to stopping the public use of such structures during repair. The major reason for this frequent repair is mainly due to the lack of realistic and accurate assessment system for the bridge decks. The purpose of the present research was to develop a realistic expert system, called Bridge Slab-Expert which can evaluate reasonably the condition as well as the service life of concrete bridge decks, based on the deterioration models that are derived from both the structural and environmental effects. The diagnosis assessment of deck slabs due to structural and environmental effects are developed based on the cracking in concrete, surface distress and structural distress. Fuzzy logic is utilized to handle uncertainties and imprecision involved. Finally, Bridge Slab-Expert is developed for prediction of safety and remaining service life based on the chloride ions penetration and fick's second law. Proposed expert system is based on user-friendly GUI environment. The developed expert system will allow the correct diagnosis of concrete decks, realistic prediction of service life, the determination of confidence level, the description of condition and the proposed action for repair.