• Journal of Electrochemical Science and Technology
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• 제14권2호
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• pp.120-130
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• 2023

PEMFC has high potential for future development due to its high energy density, eco-friendliness, and high energy efficiency. When it becomes small, light and flexible, it can be competitive as an energy source for portable devices or flexible electronic devices. However, the use of hard and heavy materials for structural rigidity and uniform contact pressure transmission has become an obstacle to reducing the weight and flexibility of PEMFCs. This review intends to provide an example of the application of a new structure and material for lightweight and flexibility. As a lightweight PEMFC, a tubular design is presented and structural advantages through numerical modeling are explained. Manufacturing methods to realize the structural advantages and possibilities of tubular PEMFCs are discussed. In addition, the materials and manufacturing processes used to fabricate lightweight and flexible PEMFCs are described and factors affecting performance are analyzed. Strategies and structural improvements of light and flexible movements are discussed according to the component parts.

• 유통과학연구
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• 제22권5호
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• pp.67-79
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• 2024

Purpose: The purpose of this study is to shopping medium determinants and consumer behavior differences based on the value of consumption. Methodology: The subjects of the survey were adult men and women in their 20s or older living in Korea, and 283 valid responses were obtained. A Logit model was used to identify consumption value factors and shopping medium choices. A t-test was conducted to analyze the differences between consumer behavior based on preferred shopping medium (on/offline). Results: The inclusion of community-oriented factors such as eco-friendliness and social contributions lead to higher likelihood of choosing offline shopping. In addition, consumers who value self-expression and who are price sensitive are more likely to choose online stores. Conclusions: It was found that community-oriented factors lead shoppers to choose offline shopping, and the need for self-expression lead shoppers to choose online stores.

• 한국의류학회지
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• 제45권1호
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• pp.136-154
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• 2021

'Slow fashion' has become a hot issue in the fashion world as fast fashion has caused environmental and ethical problems. This study synthesized the characteristics of slow fashion from preceding studies and organized them into four characteristics (craftsmanship, nature-friendly attitude, localism, and pursuit of exclusive value). This study compared designers, John Alexander Skelton and Geoffrey B. Small with four characteristics. First, both designers sought craftsmanship based on tailoring, but Skelton focused on the eco-friendliness of materials, and Small emphasized the development of high-quality fabrics. Second, we found a nature-friendly attitude in both designers, but unlike Skelton, which maintains nature-friendliness in the process of clothing production, Small showed this characteristic through presentations. Third, both designers revealed localism through their affection for the fabrics and culture of each country. Moreover, Small extended its meaning to respect minority tastes. Finally, both designers pursued exclusive values through collections under the themes of class problem, and gender conflicts. However, Skelton melted these topics into British culture and revealed them indirectly versus Small who showed sensitive topics directly in the collections. This study will provide the foundation for analyzing designers through the characteristics of slow fashion, and suggests directions that slow fashion designers should move towards.

• 인터넷정보학회논문지
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• 제25권1호
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• pp.69-78
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• 2024

최근 소비자들은 환경, 사회, 지배구조 관련 정보를 확인하고 더 나은 사회적 가치와 환경 친화적인 제품을 선택하려는 경향이 증가되고 있다. 본 논문에서는 GraphSAGE와 GAT를 결합한 모델인 MultiSAGE를 활용하여 최근 소비 트렌드인 가치소비에 맞추어 ESG 지표를 적용한 상품 추천 시스템을 제안하였다. 이를 위하여 한국 ESG 기준원에서 수집한 2022년 1,033개 기업의 ESG 등급 데이터와 실제 N기업의 쇼핑의 상품 데이터를 Heterogeneous Graph 형식의 데이터로 바꾸는 데이터 처리 과정과 MultiSAGE를 적용하여 머신 러닝에 적용하고, 특정 상품을 입력하면 그 상품의 친환경 대체재를 추천해주는 추천 시스템을 구현하였다. 구현결과, 소비자들은 기업의 ESG지표를 적용한 제품을 쉽게 비교하여 구매할 수 있고, 이를 통해 사회적 가치와 환경친화적인 제품을 추천하는 시스템에 활용될 것으로 기대한다.

• 청정기술
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• 제20권3호
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• pp.241-250
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• 2014

본 논문에서는 싸이클론 청소기들의 성능 및 환경성 평가를 실시하고, 결과를 분석하여 환경에 대한 영향을 최소화하기 위한 개선방안에 대하여 연구하였다. 환경성 평가에는 제품의 원재료 취득, 제조, 운송, 사용 및 폐기 과정에 대해서 제품이 환경에 미치는 영향을 정량적으로 평가하는 전과정 평가(life cycle assessment, LCA)를 간략한 형태로 이용하였다. 2가지의 싸이클론 청소기의 성능을 각 제품의 전력량, 흡입력, 소음, 온도를 관련 규정에 따라 측정하여 비교하였으며, 환경성 평가를 통해 전과정 중 사용단계의 에너지 소모가 가장 많다는 결과를 얻었다. 이를 바탕으로 사용단계의 에너지 소모를 줄이기 위해 싸이클론 청소기 내부에 배플(baffle)을 설치하고, 유지/소모품인 필터의 교환 주기를 늘려 사용단계의 에너지를 감소시키는 개선 방안을 제안하였다. 또한, 싸이클론 청소기의 불필요한 원료 물질 및 부품을 제거하고 상대적으로 재활용률이 높은 원재료 물질로 대체하는 방안을 고려하여 청소기의 중량은 줄이고, 재활용률은 높여 전과정에 대한 에너지 소비를 낮춘 친환경 청소기에 관하여 연구하였다.

• 패션비즈니스
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• 제19권4호
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• pp.120-134
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• 2015

This study aimed to determine the physical properties of silk and nylon fabrics that are treated with persimmon juice in accordance with irradiation time of ultraviolet spectrum. Persimmon juice dyeing has the advantage of using the tannin component of the persimmon. Tannin plays an important role in inhibiting photodegradation of fibers or polymers. Among fibrous materials, silk and nylon are prone to deterioration by light. Hence, this study aimed to reduce these weaknesses of silk and nylon by applying persimmon juice treatment. We accordingly carried out investigation and experiments on ultraviolet irradiation, and physical characteristics of treated fabrics. The persimmon juice treatment process led to increased weight and thickness. In addition, the air permeability of silk fabric was increased, as compared to the control specimen; whereas, that of nylon fabric was decreased. Both drape stiffness and flex stiffness of silk and nylon tended to be high in textiles processed with persimmon juice treatment, as compared to the control textile. Peak load and elongation at peak load of untreated samples clearly decreased in both silk and nylon fabrics with the increase of ultraviolet irradiation time, while those of persimmon juice treated samples increased. Furthermore, ultraviolet blocking ratio measurement indicated that the fabric specimens treated with persimmon juice blocked U.V. spectrum better than the control specimen.

• 교육시설 논문지
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• 제24권6호
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• pp.45-53
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• 2017

The purpose of this study is to provide the fundamental data to improve a school building through comparing and analyzing facilities of high schools located in Gyeonggi - do Province on the basis of the Design Indicator for the Korean Educational Buildings. Two types of high schools were examined for this study. Some of them are high schools selected by Korean Ministry of Education as a school equipped with superior facilities and the others are high schools equipped with general facilities. 8 items such as safety, comfort, the function of education, utilization, the public, eco-friendliness, technology performance, economical efficiency were examined by 5 point Likert scale. Findings showed that all facilities of both types of high schools received high ratings in terms of safety, utilization, and technology performance. However, the evaluation index on 'various used outdoor space' and 'public buildings harmonized with surroundings' of the education function of both types of high schools was low, which implies that the facility related to the education function needs to be improved. It infers that facilities are simplified and harmony with surroundings disappears when altering the design of the school building due to the convenience of building and the problem of the budget. Therefore, these need to be primarily controlled. Additionally, in high schools with general facilities, the evaluation index on 'aesthetic interior and exterior design of comfort', 'the responsive space to the demand for teaching and learning of the function of education', and eco-friendless were so low that these factors need to be considered when designing the school building.

• 한국가구학회지
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• 제23권4호
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• pp.415-424
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• 2012

Since the Korean War, starvation and severly desperate living conditions hit the whole country. However, Koreans finally overcame such difficulties, achieving the miracle on the Han River. Through rapid industrial developments, Korea would not need any more supports from the outside but rather became a country which would offer a support. Meanwhile, in 1997, the Korean domestic economy underwent IMF which had caused a massive number of unemployeds. Among those people, many began to show interest in D.I.Y woodcraft for a whole new change and eventually, the industry of D.I.Y woodcraft business became expanded. Now, Korea survived I.M.F and was grown as one of the leading countries in the world, having held the G20 summit conference. Such achievements helped national income increased with the domestic GNP of $30,000, having exceeded $20,000. The population also grew to over fifty million and with all these factors, Korea joined the ranks of advanced countries. As a living environment of an individual gets improved and people have had time on their sides due to the five-day workweek, many have been taking this opportunity to engage in self-development and leisure activities. As trends are pursuing eco-friendliness and D.I.Y, D.I.Y woodcraft workshops are opening nationwide. Considering this, as analyzing present conditions of D.I.Y woodcraft workshops, which are being quickly popular at this moment in Korea, this study focuses on presenting a Korean-style D.I.Y woodcraft workshop, suggesting how to promote D.I.Y woodcraft business to be a pivot of the furniture industry in Korea.

• 한국구조물진단유지관리공학회 논문집
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• 제14권1호
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• pp.102-108
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• 2010

본 연구의 목적은 폐 PET병을 재활용하여 만든 섬유(RPET)를 콘크리트 부재에 적용시키기 위한 성능 평가에 있다. RPET 섬유보강 효과를 평가하기 위해서 압축강도, 탄성계수, 쪼갬인장강도와 같은 기초물성실험과 건조수축균열실험을 수행하였다. 기초물성실험에서 RPET의 혼입률이 증가할수록 RPET 보강 콘크리트의 압축강도와 탄성계수는 감소하였고, 쪼갬인장강도는 증가하였다. 건조수축 실험에서 자유건조수축은 증가하였다. 반면에 구속건조수축의 경우 RPET 섬유에 의한 인장 저항성의 증가로 인해 균열 발생을 지연시켰다. RPET 섬유와 PP 섬유를 혼입한 콘크리트 시편의 특성을 비교해보면 두 섬유가 유사하다는 것을 알 수 있다. 따라서 RPET 섬유는 PP 섬유의 대체 재료로서 충분할 뿐만 아니라 폐 PET병을 재활용하고 환경오염을 저감시킨다는 측면에서 친환경적으로 더 뛰어나다는 것을 알 수 있다.

• 산업진흥연구
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• 제7권1호
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• pp.9-15
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• 2022

본 연구는 한국 커피산업에서 경쟁력 있는 기업인 스타벅스의 성장배경을 분석하고자 하였다. 이에 STEEP 분석기법을 활용하여 기업이 보유한 각각의 경쟁력을 분석하고 결과를 경쟁력 요소를 도출하고자 하였다. 연구 결과는 다음과 같다. 사회적인 측면을 살펴보면 경제성장에 따른 생활수준이 높아져옴에 따라 여성에 경제적 활동이 기폭제 역할을 해왔다. 또한 과거 커피문화의 경우 자판기 믹스커피 문화에서 문화공간적인 측면을 강조하는 소비시장으로 변모함을 간파해온 스타벅스 대응전략이 유효하였다. 기술적인 측면을 살펴보면 프랜차이점 원두 맛에 일률적 표준화를 확보하여 편차를 줄여왔으며 매장을 직영으로 운영함으로서 표준화된 운영 시스템 운영이 가능하였다. 그리고 경제적인 측면을 살펴보면, 커피 소비시장이 확장세를 이어옴에 따라 시장전체 크기 또한 비례적으로 커져 안정적인 성장환경이 형성되어왔다는 점이다. 마지막으로 환경적, 정책적 측면을 살펴보면, 최근 친환경성을 강조한 정책방향을 간파하고 시장 선두기업으로서 친환경 기업으로서의 정책 활동에 기초한 마케팅 전략방향이 주요해왔다는 점이다.