• 한국환경복원기술학회지
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• 제4권3호
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• pp.55-65
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• 2001

The hydrological cycle system in the city is generally characterized by quick runoff, bad infiltration, low evaporation rate, and so on. It is caused by sealing greens up with pavements. Also, there are lots of contradictory environmental problems, such as inundation, the lack of underground water and dryness in the city, caused by the urban drainage system which is mostly focused on the quick draining off rainfall. In addition, the technique joining rain and sewage, which has more dangers of inundation, occupies 66% between two Korean drainage systems which consist of joining and dividing system. There has been some need to convert the present drainage system into the environmentally friendly hydrological cycle system. This is a theoretical study to examine some foreign cases and suggested applicable methods in our country, focusing on the environmentalyl friendly system of rainfall drainage. The precipitation treatment system can be made up of some possible phases choosing from premanagement, utilization, infiltration, retention, and inducement phases. Therefore, this study mostly focused on infiltration, retention, and inducement phases. It is necessary to suggest the multifunctional utilization of outdoor spaces, especially applying in new constructing and re-constructing residential estates.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2010년도 춘계학술발표대회
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• pp.5.1-5.1
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• 2010

One of the most important environmental problems is global warming. Global warming is caused by increase in the amounts of water vapor, methane, carbon dioxide and other gases being released into the atmosphere as a result of the burning of fossil fuels. It has thus become important to reduce fossil fuel use. Environmentally friendly preparation of functional materials has, therefore, attracted much interest for environmental problems. Furthermore, nature mimetic processes are recently been of great interest as environmentally friendly one. There have been many studies on fabrication of various functional nanocrystals. Among various nanocrystal fabrication techniques, flux growth is an environmentally friendly, very convenient process and can produce functional nanocrystals at temperatures below the melting points of the solutes. Furthermore, this technique is suitable for the synthesis of crystals having an enhedral habit. In flux growth, the constituents of the materials to be crystallized are dissolved in a suitable flux (solvent) and crystal growth occurs as the solution becomes critically supersaturated. The supersaturation is attained by cooling the solution, by evaporation of the solvent or by a transport process in which the solute is made to flow from a hotter to a cooler region. Many kinds of oxide nanocrystals have been grown in our laboratory. For example, zero- (e.g., particle), one- (e.g., whisker and tube) and two-dimensional (e.g., sheet) nanocrystals were successfully grown by flux method. Our flux-growth technique has some industrial and ecological merits because the nanocrystal fabrication temperatures are far below their melting points and because the used reagents are less harmless to human being and the environment.

• Asian Journal for Public Opinion Research
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• 제9권2호
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• pp.161-187
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• 2021

To address threats to the natural environment, the government in Pakistan has banned the use of plastic bags for shopping. The concept of governmentality presented by Michel Foucault explores the techniques of governance and defines law not just as the manifestation of sovereign power but also as a technique of governance involving a range of organized practices designed to shape mentalities to achieve certain desired ends in subjects which claim to be for the welfare of the population. The present study explores the perceptions of the consumers regarding the rationality of the government behind the ban and also highlights the effectiveness of the use of law as a technique of governance. A qualitative approach was used by conducting fifteen interviews with young consumers selected through convenience sampling. The findings suggest that the rationality of the government behind the ban was received well by the consumers and the ban was viewed as a positive and pro-environmental step. The use of law as a technique of governance also proved to be effective in the said case because the people did not perceive the law as coercive despite the radical change it brought to their shopping practices. The present study contributes to the development of the theoretical understanding of governmentality and its sub-concept of the use of law as a technique of governance.

• 한국환경복원기술학회지
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• 제13권1호
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• pp.112-120
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• 2010

This study was carried out to develop the environmental friendly restoration technique for various disturbed slopes using native plants seed chips. As the result of the separated seeding using the developed seed chips of native plant combination, average germination rate and survival rate of trees, shrubs, and herbs were higher than those of the direct seeding, as 79~70%, 83~73%, and 59~53% or so, respectively. Also, the germination rates and the survival rates of trees, shrubs, and herbs in the separated seeding by the native plants seed chips were 10~15 times higher than those of the direct seeding. Numbers of plants survived were at least 10 times of that of the simple seeding. The native plants seed chip technique is more efficient in soil slopes compared with stone slopes. The application of the native plants seed chip technique makes the restoration stabilized through the herbs dominant vegetation to the woody dominant 1 within 3 years, and the Landscapes also changed from herbs to variously combined herbs and woody. The technique using native plants seed chips that can be applicable to various disturbed slops is more efficient than conventional restoration techniques in the respect of economics and landscape.

• Nuclear Engineering and Technology
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• 제54권2호
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• pp.456-461
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• 2022

Heavy metal pollution is caused due to anthropogenic activities and is considered as a serious environmental problem which endangers human health and environment. The present study deals with biosorption, an eco-friendly technique for the removal of heavy metal Zn(II) from aqueous medium. Various natural materials have been explored for the uptake of metal ions, where most of them are physically or chemically enhanced. Dry cowdung powder (DCP) has been utilized as a low-cost, environmentally friendly humiresin without any pre-treatment, thus demonstrating the concept of Green Chemistry. Batch biosorption studies using ⁶⁵Zn(II) tracer were performed and the impact of different experimental parameters was studied. Results revealed that at pH 6, 94 ± 2% of Zn(II) was effectively biosorbed in 5 min, at 303 K. The process was spontaneous and exothermic, following pseudo-second-order reaction. The mechanism of heavy metal biosorption employing green adsorbent was therefore elucidated in order to determine the optimal method for removing Zn(II) ions. DCP has a lot of potential in the wastewater treatment industry, as seen by its ability to meet 3A's affordability, adaptability, and acceptability criteria. As a result, DCP emerges as one of the most promising challengers for green chemistry and the zero-waste idea.

• 환경정책연구
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• 제12권1호
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• pp.3-35
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• 2013

국내의 대표적 친환경 도시 조성사례인 수도권 제2기 신도시 내에 입주한 4개권역 총 80개 아파트단지를 대상으로 아파트단지 내 정성적 친환경 계획요소(독립변수)가 정량적 아파트 실거래 가격(종속변수)에 미치는 영향도를 통계적 계량기법을 활용해서 실증 분석하였다. 기존 도시 및 건축학적 차원에서의 정성적인 계획요소 분류체계를 발전적으로 좀 더 확장하여 환경경제학적 차원의 정량적인 계량분석 방안을 모색하였다는 점에서 의의를 찾을 수 있다. 또한 실증분석 결과로 수도권 제2기 신도시 아파트단지에 도입된 친환경 계획요소가 아파트 실거래가격에 미치는 매우 비중있고 주목할 만한 경제적 유발효과를 실증적으로 확인할 수 있었으며, 특히 주목할 점은 신 재생에너지 도입 등 최신 녹색신기술이 적용된 다양하고 차별화된 친환경 계획요소가 이미 보편화되어 아파트 실거래가격에 매우 유의미한 영향을 미치고 있음을 확인할 수 있었다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제13권3호
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• pp.37-44
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• 2008

국토개발사업의 사전 계획 과정에서 개발할 것인지 보전할 것인지에 대한 의사결정은 인간 활동에 영향을 줄 수 있는 편리함과 이익을 고려해야 할 뿐만 아니라, 자연환경생태에 미칠 수 있는 영향을 종합적으로 예측하고 평가할 수 있는 자료기반 및 통합적 평가기법을 요구한다. 동식물생태와 지형경관요소들은 환경부의 생태자연도를 통해서 환경영향평가에 현재 활용되고 있지만, 자연생태의 주요 구성요소 중 하나인 토양생태는 정량적인 자료와 지형정보와 연계된 정보의 부재로 환경영향평가에서 고려되지 못하고 있다. 본 연구에서는 토양생태를 포함한 자연환경과 생활환경 요소들을 망라해서 총체적 환경성을 평가할 수 있는 수치지도를 작성하고 토양생태 등급의 가중치가 친환경도로 노선 선정에 미치는 영향에 대해서 민감도 분석을 수행하였다. 그 결과 자연환경 요소들 중 토양생태의 가중치가 14% 이상 만 되어도 최적 친환경노선 선정에 민감하게 영향을 미쳤다. 본 연구의 결과를 통해서 이제까지 환경영향 평가에서 무시되어 오던 토양생태 정보가 친환경 건설개발사업의 계획 및 기초설계 단계에서 중요하게 고려되어야 할 생태요소임을 입증할 수 있었다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.1435-1439
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• 2004

Most recently, CP(Cellular Phone) has been one of the most important technologies in the IT(Information Tech-nology) field, and it is situated in a position of great importance industrially and economically. To produce the best CP in the world, a new technological concept and its advanced implementation technique is required, due to the extreme level of competition in the world market. The RT(Robot Technology) has been developed as the next generation of a future technology. Current robots require advanced technology, such as soft computing, human-friendly interface, interaction technique, speech recognition, object recognition etc. unlike the industrial robots of the past. Therefore, this paper explains conceptual research for development of the RCP(Robotic Cellular Phone), a new technological concept, in which a synergy effect is generated by the merging of IT & RT. RCP infra consists of $RCP^{Mobility}$ $RCP^{Interaction}$, $RCP^{Integration}$ technologies. For $RCP^{Mobility}$, human-friendly motion automation and personal service with walking and arming ability are developed. $RCP^{Interaction}$ ability is achieved by modeling an emotion-generating engine and $RCP^{Integration}$ that recognizes environmental and self conditions is developed. By joining intelligent algorithms and CP communication network with the three base modules, a RCP system is constructed. Especially, the RCP mobility system is focused in this paper. $RCP^{Mobility}$ is to apply a mobility technology, which is popular robot technology, to CP and combine human-friendly motion and navigation function to CP. It develops a new technological application system of auto-charging and real-world entertainment function etc. This technology can make a CP companion pet robot. It is an automation of human-friendly motions such as opening and closing of CPs, rotation of antenna, manipulation and wheel-walking. It's target is the implementation of wheel and manipulator functions that can give service to humans with human-friendly motion. So, this paper presents the definition, the basic theory and experiment results of the RCP mobility system. We confirm a good performance of the RCP mobility system through the experiment results.

• 한국지반환경공학회 논문집
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• 제9권5호
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• pp.29-36
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• 2008

숏크리트는 NATM공법에서 터널 굴착 후 지반안정을 위한 주요 지보재로서 시공기간의 단축과 시공비용 절감을 위해 일반콘크리트 라이닝을 대신하여 영구 숏크리트 라이닝의 사용이 요구되고 있는 추세이다. 이러한 영구 숏크리트 라이닝으로 사용하기 위해 고성능고강도 숏크리트가 요구되고 있으며, 인체에 대한 유해성 및 환경오염의 감소방안도 해결해야 할 문제로 부각되고 있다. 따라서, 본 연구에서는 NATM공법 시공시 조기에 고강도 발현이 가능한 숏크리트재료를 개발하기 위하여 시멘트광물계 급결재를 사용하여 강도측정용 공시체를 제작하여 기존에 쓰여지고 있는 숏크리트재료와 비교하여 일축압축시험, 휨강도시험, 수중불분리시험을 실시하였고, 환경영향성을 평가하기 위해 어독성시험을 실시하였다. 시험결과, 일축압축강도 및 휨강도는 연구대상재료의 재령 7일강도가 기존재료의 28일 강도와 대등하였으며, 수중불분리시험 결과 연구대상재료의 불분리성이 우수하게 나타났다. 환경영향성(어독성시험)평가 결과 기존숏크리트에 비해 연구대상재료가 친환경적인 것으로 나타났다.

• 한국유기농업학회지
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• 제26권1호
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• pp.19-31
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• 2018

In general, an increase in consumer income increases interest in safe foods and increases consumption of environmental friendly foods. Meanwhile, even in Malawi, interest in safe food and environmentally friendly food has been increasing due to increase in per capita income, but research related to this has not been done yet. The purpose of this study is to estimate the value of environmentally friendly foods in Malawi consumers. For this purpose, we surveyed the consumption patterns and estimated the value of organic chicken for consumers visiting supermarkets. As a value estimation technique, Contingent Valuation Method (CVM) was used. Probit model analysis showed that price, expenditure on regular chicken, and knowledge of organic food affect the willingness to pay for organic chicken. CVM analysis shows that Malawi supermarket consumers are willing to pay MK2,514 (3.59) dollars per kilo of organic chicken, which is 25.7% higher than the average price of a regular chicken. Thus, Malawi supermarket consumers can deduce that they have a higher value for environmentally friendly food than regular food. These findings can be used in formulating policies on food safety by government officials, organic chicken meat marketing strategies by supermarket mangers, decision making to enhance organic food production by producers, in order to develop organic food industry.