• KIEAE Journal
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• 제17권1호
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• pp.43-48
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• 2017

Purpose: Building owners or residents have concerns to strive for energy-saving and environmental conservation by utilizing with eco-friendlier energy resources for their physical environment. In this paper, an algae façade system is proposed as an energy-friendly building component to improve energy productivity and indoor environmental quality, and this study aims at verifying alternative technologies for implementing building elevations that contain various colors equipped with algae façade systems and suggesting design guidelines to enhance both building performance and design values. Method: The color of algae is basically ranged about the saturation green, and it is hardly converted to other variations. Such a problem can be resolved through the artificial lights like LED (Light Emitting Diode) lamps to mix the color from the algae and buildings could possibly change the elevation in many ways under the influence of daylight. Result: As a result, the suggested system may increase the aesthetic aspect of the building in response to environmental changes. The system cannot possibly be applied for only new construction, but also it can be utilized with the existing buildings as well. The proposed system is expected to be applied not only a new construction and any existing buildings as well, and it will cover from the environmentally friendly energy generation in the industry to a new application system for increasing energy efficiency and the beauty of building envelopes.

• Journal of the Korean Wood Science and Technology
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• 제50권6호
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• pp.375-391
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• 2022

Improving public awareness of wood is crucial for expanding the use of wood and establishing a wood culture. In this study, the environment and trends of the public's wood utilization were analyzed using a questionnaire survey and online text mining at a time when eco-friendly practices are gaining popularity. As a result of reducing climatic and environmental concerns and its positive physical and psychological effects, the use of wood is predicted to rise in areas intimately connected to everyday living, such as wood furniture, wooden structures, and interior materials. Nonetheless, there was a negative awareness that wood was expensive, difficult to maintain, and associated with deforestation. The correlations between wood-related search terms on major Korean portal sites were analyzed and categorized into five groups: Wooden architecture, cultural education, woodworking, wood industry, and wood policy. As a building material, wood was seen as more traditional and friendly than reinforced concrete and stone. Eighty-six percent of respondents expected to utilize wood as a building material in the future, regardless of whether the wood is domestically produced or imported. Sixty-five percent responded favorably about the effects of wood on the health of wooden home inhabitants. It is believed that both active publicity and quantifiable value analysis of human and environmental friendliness are required to increase pro-environment awareness of wood utilization.

• 한국콘텐츠학회논문지
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• 제18권7호
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• pp.375-387
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• 2018

본 연구는 친환경 자동차의 조기 수용을 유도하는 요인들에 대해 조사하고 있다. 미국, 독일, 그리고 일본의 3개국 자동차 소유자들을 대상으로 설문조사를 실시하였으며, 친환경 자동차의 조기 수용에 영향을 미치는 요인들을 정서적, 인지적, 행동적 요인들로 구분하여 살펴보았다. 실증 결과, 정서적 및 인지적 요소들은 조기 수용에 상당히 유의한 영향을 미치고 있었으며, 행동적 요인 또한 자동차 사용 맥락과 관련해 유의한 영향을 미치고 있음을 확인할 수 있었다. 즉, 환경 중심적 가치관과 녹색기술에 대한 지식 정도가 증대될수록 친환경자동차의 조기 수용의사는 증진되는 것으로 밝혀졌으며, 행동적 요인 차원에서는 자동차를 통근(vs. 여행) 등의 정규적, 실용적 (vs. 쾌락적) 목적으로 사용하는 비중이 커질수록 친환경자동차에 대한 조기수용의사가 고양되는 것으로 밝혀졌다. 이러한 일련의 결과는 친환경자동차의 조기수용을 독려하려면 소비자 개인의 자동차 사용 맥락 및 국가별 차이를 충분히 고려하여야 함을 보여주는 것이라고 할 수 있다.

• 한국환경농학회지
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• 제42권4호
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• pp.371-381
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• 2023

The effectiveness of plant-based attractants was studied using large traps, which attracted relatively more snails in agricultural water drainage ditches and rice-cultivating environments, although their effectiveness in rice fields and lakes was limited. The rate began to rise after three hours of observation. Watermelon peel exhibited the highest apple snail attraction rate (13.8%), followed by potatoes (10.0%), and apple peel (8.8%). These values significantly differed from the attraction rate attributed to papaya leaves (F=3.84; P=0.0387). After 24 h, watermelon peel and apple peel indicated a higher rate of attraction (23.4% and 21.7%, respectively), which were significantly different compared with those of papaya leaves and potatoes (F=9.94; P=0.00455). Large bait traps outperformed funnel traps in capturing golden apple snails and trapped a significant number of snails measuring over 1 cm in size. Watermelon peel was the most effective attractant for a large bait trap, followed by apple peel, potatoes, and papaya leaves. On average, 110 snails were captured in the lure net. However, potatoes, apple peels, and papaya leaves caught an average of 93, 80, and 79 snails, respectively. Among the attractants, the lure effect of the snails was not significantly different. The efficiency of large bait traps in capturing snails, regardless of the plant attractant employed, followed the order: apple peel > watermelon peel and potatoes > papaya leaves > melon > Korean melon. Watermelon peel is highly recommended for farmer use, as well as apple peel and potatoes. Utilizing these snail attractants may contribute positively to developing a safe and environment-friendly integrated pest management strategy.

• 식물병연구
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• 제18권4호
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• pp.338-348
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• 2012

감자역병은 감자재배에서 가장 중요한 병 중의 하나다. 감자역병의 친환경방제를 위하여 SH-1와 SH-2을 이용하여 감자역병균의 균사생장, 예방효과, 잎을 이용한 생물검정 및 포장시험을 통해 평가하였다. 실내에서 유묘를 이용한 시험에서 SH-1와 SH-2 제형을 살포 후 역병균을 접종 후 예방효과를 조사한 결과 95% 이상 발병을 억제하는 효과가 있었다. SH-1과 SH-2의 균사생장 억제 효과는 $300{\mu}g/ml$의 농도에서 균총의 크기를 74% 이상을 억제하였다. 잎을 이용한 생물검정에서 1% SH-1와 SH-2을 살포 후 1시간 뒤에 병원균을 접종한 결과 병의 발달을 줄였다. 감자 줄기에 총 폴리페놀 함량도 SH-1와 SH-2을 살포한 구에서 증가하였다. 포장에서 역병방제효과 시험에서 1% SH-1와 SH-2을 7일 간격 4회 살포한 처리구에서 각각 72%와 53%의 역병 방제 효과가 있었으며, 14일간 3회 살포한 구에도 유사한 병 방제효과를 보였다. 감자비대기에 1% SH-1와 SH-2 살포는 감자 생체 중을 증가시켰으며, 상품의 비율도 높았다. 이 결과에 의하면 SH-1와 SH-2의 살포는 친환경 유기농업에서 천연살균제로서 역병 방제에 사용 할 수 있으며, 감자 수확량도 증가시킬 수 있다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1129-1135
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• 2011

Recently, In Korea region becoming subtropical climate, freezing index values have been increasing in winter. The climate condition in Korean became polarized. Since freezing index is increased recently, track heaving from frost is often occurred, which is ignored in past couple of years. Methods to prevent frost-heaving are circumfusion of calcium chloride and replacement of gravel ballast in usual. The effects of those methods are minimal, incontinuous, and not eco-friendly. Therefore, maintenances are performed repeatedly every year. This study discussed utilizing the waste-tire-chips and insulators in the small structures(bridge and box etc) for prevention of frost-heaving. In order to prove effect of waste-tire-chips, laboratory and field tests were conducted with CBR and measurement of frost-heaving amount to prove and verify effect of insulators.

• 대한가정학회지
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• 제47권3호
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• pp.67-77
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• 2009

This study developed a model economic education program for young children related to Korean seasonal customs. The model was developed via literature reviews and survey research concerning teachers’' recognition of ‘'early childhood economic education’', consultations with professionals in the field, and testing and modifying the program. The goals of the model program were: teaching children to understand basic economic concepts, helping children to develop an economic attitude that emphasizes interdependence, and acknowledging the importance of eco-friendly economic values. The model includes three educational areas and 21 content areas including understanding the concept of exchange, sharing and cooperation, and circulation with nature. This study also developed 37 early childhood economic education activities using the teaching and learning methods of experiencing nature, virtual experience, real life experience, and traditional games experience.

• KIEAE Journal
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• 제14권6호
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• pp.15-21
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• 2014

Recently, energy generation using algae technology is being promising due to the emerging issues on energy insufficiency and environmental contamination, although the solution has not been resolved in aspect of technological and economical efficiencies since it was originally proposed in the early 1980s by many scholars. The energy production technology using algae materials has great values as not only a solution for new energy generation but also an eco-friendly sustainable building equipment system. In addition, cultivation tank for algae using water sources seems to play a role as a decreasing system for thermal transmittance on building components. This study aims at investigating the adaptability towards the future sustainable building with algae technology and testifying the energy efficiency of the algae skins by operating a couple of simulation tools to measure building performances for the proposed prototype of the façade system.

• Journal of Magnetics
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• 제20권2호
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• pp.193-200
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• 2015

Direct-acting solenoid valves are used in the automotive industry due to their simple structure and quick response in controlling the flow of fluid. We performed an optimization study of response time in order to improve the dynamic performance of a direct-acting solenoid valve. For the optimal design process, we used the commercial optimization software PIAnO, which provides various tools for efficient optimization including design of experiments (DOE), approximation techniques, and a design optimization algorithm. 35 sampling points of computational experiments are performed to find the optimum values of the design variables. In all cases, ANSYS Maxwell electromagnetic analysis software was used to model the electromagnetic dynamics. An approximate model generated from the electromagnetic analysis was estimated and used for the optimization. The best optimization model was selected using the verified approximation model called the Kriging model, and an optimization algorithm called the progressive quadratic response surface method (PQRSM).

• Elastomers and Composites
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• 제54권1호
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• pp.35-39
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• 2019

Four different polymer compounds were prepared from four kinds of plasticizers, viz. di-2-ethylhexyl azelate (DOZ), di-2-ethylhexyl adipate (DOA), di-2-ethylhexyl sebacate (DOS), and di-2-butyl sebacate (DBS), for making cable sheaths for ships. Ethylene-vinyl acetate and ethylene-propylene-diene-copolymer as matrix polymers and ethylene-vinyl acetate grafted maleic anhydride as a coupling agent were compounded with a flame retardant, crosslinking agent, filler, and other additives, besides the plasticizer to obtain the polymer compounds. The polymer containing DOZ showed the highest MH and ${\Delta}T$ in the rheology test, while that containing DBS was found to have the lowest tensile strength and highest elongation because of low ${\Delta}T$. The four polymers showed similar values (31.7-31.9) for flame resistance, while the polymer containing DOZ showed the highest value for cold resistance.