• 한국기계가공학회지
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• 제15권5호
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• pp.100-108
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• 2016

In various industries, many researches studies have been done in using nano thin film fabrication technology. In the field of printed electronics, various electronic devices can be fabricated using a direct printing process of on multiple functional materials. It has the advantages of low prices, environment-friendly environmentally friendly, flexibleility, large scale, mass production produced, simple process and so on. In this study, a viable thin film fabrication technology has beenwas introduced using the surface acoustic wave mechanism for thin film deposition. Fabrication of thin films using organic, inorganic and composite of organic/inorganic materials have been were analyzed through the experimental research. In this experiment, organic material MEH:PPV, inorganic material ZnO and composite material MEH:PPV/ZnO have been depo sited as thin films.

• 한국식품조리과학회지
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• 제25권5호
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• pp.564-574
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• 2009

This study was conducted to evaluate the effects of the LOHAS index value of school food service employees on the purchase of food materials and foodservice quality. The subjects consisted of 566 foodservice employees. The findings were as follows. (1) The foodservice employee's LOHAS index fell within that of a NOMADICS group with an average of 72.18 points out of 100 points. (2) When the age, working experience and LOHAS index of the foodservice employees was high, the necessity, view, interest and recognition of LOHAS introduction for the improvement of the foodservice environment was high. (3) The amount of environmentally-friendly food materials purchased by foodservice employees was high, when they had a high LOHAS index. (4) High foodservice quality management items of foodservice employees were 'sanitation management' (3.87 points) and 'human resource management' (3.84 points), whereas 'menu management' (3.57 points) and 'food material and inspection management' (3.61 points) scored low. (5) The LOHAS index of foodservice employees has a significant impact on the purchase intention of environmentally-friendly food materials in LOHAS and NOMADICS groups. (6) This study confirmed that a higher LOHAS index of foodservice employees was associated with higher foodservice quality management behavior, which leads to an improved quality of foodservice.

• Corrosion Science and Technology
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• 제20권1호
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• pp.15-21
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• 2021

Through a simple filtration process, followed by carbonization within a reductive environment, coffee waste grounds can be transformed into a non-porous hard carbon for use in multiple contexts. This resulting coffee-waste carbon has been evaluated as an eco-friendly and cost-effective replacement for conventional graphite. When compared with different types of carbon, our study found that the coffee-waste carbon fell into the category of hard carbon, as verified from the galvanostatic charge/discharge profiles. The coffee-waste carbon showed a superior rate capability when compared to that of graphite, while compromising smaller capacity at low C rates. During electrochemical reactions, it was also found that the coffee-waste carbon is well exposed to electrolytes, and its disordered characteristic is advantageous for ionic transport which leads to the low tortuosity of Li ions. Finally, the high irreversible capacity (low initial Coulombic efficiency) of the coffee-waste carbon, which if also often observed in amorphous carbon, can be adequately resolved through a solution-based prelithiation process, thereby proving that the coffee-waste carbon material is quite suitable for commercial use as an anode material for quickly-chargeable electrodes.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2006년도 추계학술발표대회 논문집
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• pp.370-373
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• 2006

Lastly, the problem of filling occurs in the process of concealed joint of adjacent components and was seen in joints between the structure and an electrical or mechanical device. Therefore, the dry processing which replaces wet joint was seen in joints between the structure and a door, ones between the structure and a finishing materials, ones between a gypsum board and electrical device, and ones between a water pipe and a tile finishing. And a process of separating the area of jointed parts in order to eliminate the problem of overlap was seen in joints between a door and a finishing material and ones between a gypsum board on the ceiling and a light. Lastly, an analysis of a process of exposing concealed parts indicated that the problem of filling could be applied to joints between the structure and an electrical or mechanical device and ones between a finishing material and a mechanical device. This study sought out methods to apply Environment Friendly Multi Housing Remodeling that allow easy remodeling as part of environment- preserving policies. It also contains basic data useful to implement long-life houses in the future by presenting a comprehensive design standard for them

• 한국주거학회논문집
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• 제28권1호
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• pp.95-107
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• 2017

The purpose of the study is to analyze the planning characteristics of outdoor space in apartment complexes in terms of child-care environment. We selected 8 apartment complexes in Cheongju, within three years from construction, of small and medium-sized apartments ($60-85m^2$) where a large number of families with young children are presumed to reside in. As a result of the study, it was found that whereas the factors that can be quantified such as the floor height differences, the angles of ramps, and the number of the rest facilities are excellent, the qualitative part which cannot be easily quantified such as the location and direction of the rest facility and play materials should be improved a lot. And the following improvements were suggested; separating the pedestrian passage from the vehicle road in the main entrance of the complex, utilizing the piloti for infant caring, making the entrance area of apartment safe for pedestrians from vehicles, reallocating resting spaces, redesigning resting spaces safer to infants, building or reallocating existing booths at the stops of kindergarten buses, redesigning the square safer from vehicles with shades, making it possible for guardians to watch infants in playing field from the resting space, allocating natural environments essential for child development.

• 농촌지도와개발
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• 제16권2호
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• pp.363-384
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• 2009

This study aimed at finding directions for Korean agriculture to establish a new paradigm of sustainable development. Various problematic issues and concerns in the environment necessitate the transformation of Korea's development paradigm from unconditional growth to "Green Growth" through new policies on green value and review of various advanced researches. In this research, the environment-friendly agriculture's problems, particularly in agribusiness were analyzed. Drawing from Michael Porter's Value Chain Analysis, this research developed a value chain model in agriculture that reflects the environment and the present situations. Future directions in the agriculture sector were also discussed. Korea realized food self-sufficiency through the green revolution in the early 1970s. However, a lot of problems have also occurred, including ground and water pollution and the destruction of ecosystems as a result of the overuse of pesticides and chemical fertilizers. In the late 1970s, the growing interest on environment-friendly agriculture led to the introduction of sustainable methods and techniques. Unfortunately however, these were not innovative enough to foster environment-friendly agriculture. Thereafter, the consumers' distrust on agricultural products has worsened and concerns about health have increased. In view of this, the Ministry of Food, Agriculture, Forestry and Fisheries introduced in December 1993 a system of Quality-Certified Products for organic and pesticide-free agri-foods. Although a fundamental step toward the sustainability of the global environment, this system was not enough to promote environment-friendly agriculture. In 2008, Korea's vision is for "Low Carbon Green Growth" to move forward while also coping with climate change. But primary sectors in a typical value chain do not consider the green value of their operations nor look at production from an environmental perspective. In order to attain sustainable development, there is a need to use less resources and energy than what is presently used in Korean agricultural and value production. The typical value chain should be transformed into a "closed-loop" such that the beginning and the end of the chain are linked together. Such structure allows the flow of materials, products and even wastes among participants in the chain in a sustained cycle. This may result in a zero-waste sustainable production without destroying the ecosystem.

• 한국유기농업학회지
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• 제18권4호
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• pp.613-626
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• 2010

웰빙시대의 도래와 함께 안전농산물에 대한 국민요구가 커져가고 있으며, 이에 따라 친환경 배 생산체계 개발이 절실한 실정이다. 따라서 본 연구는 최근 효과가 큰 것으로 알려지고 있는 유효미생물제제인 Amo 등을 비롯한 몇가지 친환경농자재를 조합 처리하여 친환경 배 생산체계를 수립코자 2년간 수행한 연구결과를 요약하면 다음과 같다. 1. 친환경농자재 처리에 의한 배과수원의 토양양분의 변화는 T-C, 유기물, Ca 및 Mg 함량은 2008년에 비해 2009년 약간 증가하였으며, 처리 간에는 EC, Ca 및 Mg 함량이 2 처리에서 많은 경향이었다. 2. 엽내 질소 및 인산함량은 2008년에 비해 2009년 각 처리구 모두에서 감소하였다. 칼륨 함량은 2008년 1.93%에 비해 2009년은 2.06%로 증가하였으며, 처리간에는 1처리구가 2.17%로 가장 많았다. 칼슘함량도 2008년에 비해 2009년 각 처리구 모두에서 함량이 감소되었으며, 처리간에는 3처리구가 1.52%로 가장 많았다. 3. 연차간 과실특성을 보면 과중은 2008년 평균 682g에 비해 2009년에는 713g으로 31g이 높았으며, 처리간에는 2처리구가 738g으로 가장 높았다. 과실의 당도함량은 12.2~12.6$^{\circ}Bx$로 2008년 평균 12.2$^{\circ}Bx$에서 2009년 12.6$^{\circ}Bx$로 당도가 증가하였다. 처리간에는 대조구와 2처리구가 12.6$^{\circ}Bx$로 가장 높았다. 4. 과피색의 L값은 연차간 처리구간에 큰 차이가 없었으나, a 값의 경우 2008년 3.73에 비해 2009년에는 5.35로 1.62 높은 경향을 보여 성숙진행이 2009년에 다소 빨랐음을 알 수 있었으며, 처리간에는 2처리구가 4.82로 가장 높았다. 5. 과실 조직의 처리간 응집성 및 점착성은 1처리구가 각각 1.97, 0.14로 가장 높았다. 부착성은 2008년과 비교하여 2009년이 -0.86이 적었으며, 유의성이 인정되었다. 처리간 부착성은 3처리가 -2.58로 가장 높았다. 과실의 경도는 1처리구가 14.4로 가장 높았으며, 씹힘성도 1처리가 1.77로 가장 높았다. 6. 과피의 무기성분 함량 중 인산함량은 2008년 0.91g/kg에 비해 2009년 0.97g/kg으로 0.06g 더 많았으며, 처리간에는 3처리가 1.15g/kg으로 가장 많았다. 칼륨함량은 2008년 7.82g/kg에 비해 2009년 8.20g/kg으로 2009년이 더 많았으며, 처리간에는 1처리가 8.34g/kg으로 가장 많았다. 칼슘은 처리간에는 3처리에서 166.80ppm을 나타내 가장 함량이 높았다. 7. 과육의 질소함량은 처리간에는 3처리가 4.32mg/g으로 가장 함량이 높았다. 인산함량은 2008년 평균 1.59g/kg에 비해 2009년 1.42mg/g로 함량이 적었으며, 처리간에는 1처리, 3처리가 1.68g/kg으로 가장 많았다. 칼륨함량은 년차 간에는 차이가 없었으며, 처리간에는 1처리가 11.81g/kg으로 가장 함량이 많았다. 칼슘함량은 2008년 34.13ppm에서 2009년은 35.10g/kg을 나타내 함량이 증가하였다. 마그네슘 함량은 3처리가 0.93g/kg으로 가장 함량이 높았다.

• 한국가구학회지
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• 제22권3호
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• pp.219-229
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• 2011

Sick building syndrome symptoms that are experienced by building occupants may be caused by toxic substances such as formaldehyde and VOCs, which are known to be emitted from building materials and wood composite products such as wood-based panel, furniture, engineered flooring and construction adhesive. In Korea, the use of wood composite products for indoor environments has increased over the last decade. Recently, wood composite products have been installed in approximately 95% of newly constructed residential buildings. The use of these products has resulted in problems related to human health, and consequently a realization about the importance of indoor air quality. In addition, consumer demand is increasing for natural materials because conventional building materials and wood composite products are made by adding urea-formaldehyde resin or they contain formaldehyde-based resin. More recently, many efforts have been made to reduce formaldehyde emission from building materials that laid in the indoor environment. Especially, if conventional formaldehyde-based adhesives are replaced with green adhesives for residential spaces, it is possible to reduce most of the emission amounts of formaldehyde in indoor environments. In line with this expectation, many researches are being conducted using natural materials such as tannin and cashew nut shell liquid (CNSL). This study discussed the affects and possibilities of green adhesives to reduce formaldehyde emission in indoor environments.

• 한국가구학회지
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• 제25권4호
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• pp.345-352
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• 2014

This study was carried out to develop eco-friendly wood street lamp (EFWSL) by using wood resources stacked in the forests after tree tending operations which were mostly abandoned, but economical as renewable wood resources for developing the wood coated street lamps with the effects of cost reduction and their attractive appearances. This study has led to the development of key compact structures of street-lighting wood poles (shaft) using laminated timber. The core technique in this study is related with producing the more stable wood poles (shaft) with the hole inside than wood poles exposed under the natural environment through applicable process to protect the wood from bursting and splitting. We also comprehensively developed the method to conserve the timber durability of wood shaft and connect the wood shaft with groove, race way to be located in the groove, locking ring, current stabilizer connected to the groove and luminaire support arm, base and hand-hole which was partly used in combination with steel materials and wood. Also we increased the utilization of abandoned and stacked woods after thinning in the forests such as Pinus densiflora, Larix leptolepis, and Pinus koraiensis plantations by maximizing the value of these natural wood resources as main materials of eco-friendly street lightings with the effects of cost reduction and attractive appearances and also the expectation of advertising effects of street lightings developed in this study.

• International Journal of Knowledge Content Development & Technology
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• 제8권1호
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• pp.51-77
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• 2018

This study aimed to determine eco-friendly factors on the aspects of library service, materials provided or handled by the library, and programs including educational programs. Furthermore, it was setup to perform a trial evaluation for the eco-friendliness of the library based on the determined evaluation standards by this study. Results are as follows; First, regarding the question of 'Do employees of the library think that establishment of green libraries is necessary?', the employees of the libraries responded yes by 65.52%, but only 4.6% responded that it would not be necessary. Second, in analyzing the most important evaluation areas of green libraries according to the opinions of the libraries' employees, they were ranked in order: the indoor environment, energy and prevention of environmental pollution, and material and resource areas. Third, 11 areas were determined to evaluate the level of greening in the libraries; the highest averages were scored 510 for the area of energy and prevention of environmental pollution, 415 for the area of library resource, and 320 for the area of indoor environment. Last, the libraries were graded based on actual data according to the results to measure the level of greening, two libraries were graded as Diamond, the highest grade, accounting for 15.39% of all libraries; Gold and Silver grades accounted for another 15.39%, together five Certified graded libraries accounted for 38.46%, which was the highest rate among the libraries. Any library scoring less than 20% when compared to the full score was graded as Non-certified, and one library, which scored 15.06% fell into this category. The results of this study set up to serve as basic data for the direction of development for green libraries in our country, as well as reference for the employees of libraries in constructing or remodeling library buildings, establishing service infrastructure, providing information service, and planning library duties in an eco-friendly way.