• Proceedings of the Korean Institute of Building Construction Conference
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• 2012.11a
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• pp.209-210
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• 2012

Cement is an essential material for social infrastructure. Cement production process for cement itself is energy-intensive and requires a large amount of natural resources for fuel and raw materials. This study is to development of recycled cement from waste concrete powder in manufacturing process of recycled aggregate concrete. Recycled cement is low carbon and green growth materials concept for eco friendly construction environment. From the test results, waste concrete powder is same chemical proportion regardless of manufacturing process of recycled aggregate concrete.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.02a
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• pp.694-694
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• 2013

With the growing need of more effective energy harvesting, solar energy has been sought as one of the prominent candidates among the eco-friendly methods. Although many types of solar cells have been developed, the electronic conversion efficiency is limited by the material's physical properties: solar cells can only harvest solar energy from limited range in solar energy spectrum. To overcome this physical limit, we approached by using the down conversion effect, transforming the high energy photons to low energy photons, to the range the designated solar cell can convert to electronic energy. In our study, we have fabricated GaAs single junction solar cells and applied CdSe quantum dots for down-conversion. We examine the effects of such application on the solar cell efficiancy, fill-factor, JSC, VOC, etc.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.05a
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• pp.218-219
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• 2014

The purpose of this study is to develop eco-friendly internal material of acrylic emulsion mortars using light-weight aggregate carrier which contains pyroligneous liquid. Four types of light-weight aggregates (vermiculite, perlite, charcoal, zeolite) that are widely used in building materials are selected and the properties such as adhesion, water absorption coefficient, antibiosis, crack and impact resistance are evaluated in accordance with KS F 4715. As a result, the properties of acrylic emulsion mortars using light-weight aggregate carrier are satisfied with KS requirements. The antibiosis is improved with increasing zeolite light-weight carrier content.

• Journal of the Korea Safety Management & Science
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• v.16 no.1
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• pp.201-206
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• 2014

GCM(Green Chain Management) is being spread by that companies which apply with eco-friendly concept in entire SCM(Supply Chain Management) perspective is being increased for resolving some recent environmental problems. There are reasons that numerous companies focus on GCM. At first various governments began to directly manage components and material contents about various noxious substances. Second, environment problem management in the entire logistics process from procurement of product materials to distribution of product became to be important according to introduction of certification system that evaluate the environmental impact throughout life-cycle of products. Purposes of this paper are 1) to analyze the GCM process whose important is more increasing in the recent logistics environment change, 2) to comprehend places and sources that generate environmental elements like energy consumption and greenhouse gas emissions in elements of logistics function, and 3) to construct integrated GCM system for observing activity of logistics function throughout life-cycle of products.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1126-1127
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• 2015

최근 환경오염 문제가 대두되면서 친환경 재료로 만들어진 제품에 대한 연구가 진행되고 있다. 그러나 일반적으로 친환경재료는 기존의 재료보다 성능이 낮거나 비싼 가격 때문에 대체하기가 쉽지 않다. 세노스피어는 화력발전소에서 생성되는 부산물중 하나로 기존 재료에 첨가되는 충전재와 유사한 성분으로 구성되어 있으며, 가벼운 것이 특징이다. 본 논문에서는 화력발전소로부터 발생되는 부산물을 절연재료의 충전재로써 활용하는 방안에 대하여 연구하였다. 에폭시수지에 세노스피어 0~100[wt%]와 실리카 0~40[wt%]를 각각 첨가하여 온도변화에 따른 AC 절연파괴강도 및 유리전이온도, 열팽창율을 시험하였다. 절연파괴 실험 결과 세노스피어/에폭시 복합재료는 실리카/에폭시 복합재료에 비하여 높은 성능을 보여주었으며, 유리전이온도와 열팽창계수는 비슷하거나 좋은 성능을 보여주었다. 따라서 세노스피어는 기존에 사용되고 있는 충전재를 대체할 수 있다고 사료된다.

• Architectural research
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• v.15 no.3
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• pp.143-150
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• 2013

The Korean government recently has rediscovered the potential value of Han-Ok, the Korean traditional house, as an eco-friendly building. In order to objectively verify the environmental performance of Han-Ok as a low carbon green building, this paper suggests the analysis method of GHG emission load of Korean traditional house, based on Life Cycle Assessment, which is commonly abbreviated to "LCA". The environmental impacts caused by building construction and operation can be analyzed through the sum of input and output data from every phase. The study particularly describes the GHG reduction effect by using traditional building materials such as wood products, traditional clay roof tiles, and mud, which are mainly used to construct Han-Ok. Also the study proposes the method for comparative analysis of quantity of GHG emissions in building's entire life cycle so that the data can be used as a reliable basis to optimize the environmental performance of building.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.05a
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• pp.133-134
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• 2017

The In the experiment on flow using sand walls, when white clay+sand was mixed with glutinous rice, traditional paper and seaweed as adherents and preventive measures for cracks, the flow was higher than other sand wall mortars. This indicates that it is effective in improving flow. Moreover, in terms of strength, a mix of white clay+sand, traditional paper and flour had a greater strength than a mix of white clay+sand, straws and flour. In the experiment to test for cracks and shrinking during drying, a composition of white clay+sand+traditional paper showed fewer cracks and less shrinking than the walls where straws were mixed in.

• Journal of the Korea Fashion and Costume Design Association
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• v.12 no.4
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• pp.173-182
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• 2010

In this study, textile designs were developed by applying Norigae for motives, were digital-printed for it's eco-friendly, delicate and short printing time and as final products, necktie, bag and bedding was developed with them. The purposes of this study were to develop a unique textile design, and then to enhance the competitiveness of Korean textile industry in the world market and pass down a Korean traditional fiber art cultural legacy. The results are as follows Norigaes are a sort of Korean traditional ornaments worn on women's Korean traditional costume. These can vary in color, material, shape, composition and said to have very high artistic value from the standpoint of the modern view. And these are symbols of happiness and women's longing of Korean traditional society. So Norigaes are worthy of applying Korean traditional motive for modern textile design. The textile designs applied a Norigae in this study were estimated comparatively high.

• International Journal of Aerospace System Engineering
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• v.3 no.1
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• pp.21-24
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• 2016

In this study, a optimal design on the hood automotive using eco-friendly natural fiber composites is performed. The hood of an automobile is determined by dividing the Inner panel shape through optimization phase to outer panel and inner panel. It was performed to optimize the size of the thickness of the inner panel and the outer panel by applying a flax/epoxy composite materials. The optimized shape was evaluated for weight-lightening, stability and the pedestrian collision safety. Through the resin flow analysis are confirmed to molding possibility judgment of product.

• Elastomers and Composites
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• v.50 no.3
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• pp.159-166
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• 2015

Silica which is used for reinforcing filler in tire industry is widely known as eco-friendly material exerting $CO_2$ reduction effect through decrease of rolling resistance and improvement of wet grip. Generally silica is classified as a highly polar filler because it contains a large number of silanol (Si-OH) group on its surface. And also silica gives a lower reinforcing effect than carbon black due to its poorer rubber-filler interaction. Therefore silica is treated with silane coupling agent or activator, then following the conventional rubber blend method, vulcanized sheets were prepared using a hot press, and cure characteristics, mechanical properties and abrasion resistance of the test specimens were investigated. It was found that with an increase in the silane coupling agent content the tensile strength, 300% modulus and abrasion resistance increased while Mooney viscosity decreased and crosslink density slightly increased with an increase of activator.