• KIEAE Journal
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• 제11권3호
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• pp.3-9
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• 2011

For urban development, natural covering area such as urban green or river is more rapidly reducing than artificial surface covering area like concrete or asphalt, so thermal environment in a city is being drastically deteriorated. Recently, since people recognize the importance of parks or rivers in a city which play roles as an environmental buffer in it, many studies and policies consider how to improve the life quality of citizens and urban environment. This study aims to examine the status of thermal environment variation in the parks and rivers of the city which is the subject of this research and provide foundational data for urban environment plans through research on temperature variation rate and temperature controlling effect.

• Journal of Information Processing Systems
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• 제16권1호
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• pp.1-5
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• 2020

Sustainable computing is a rapidly expanding field of research covering the fields of multidisciplinary engineering. With the rapid adoption of Internet of Things (IoT) devices, issues such as security, privacy, efficiency, and green computing infrastructure are increasing day by day. To achieve a sustainable computing ecosystem for future smart cities, it is important to take into account their entire life cycle from design and manufacturing to recycling and disposal as well as their wider impact on humans and the places around them. The energy efficiency aspects of the computing system range from electronic circuits to applications for systems covering small IoT devices up to large data centers. This editorial focuses on the security, privacy, and efficiency of sustainable computing for future smart cities. This issue accepted 17 articles after a rigorous review process.

• 아시안잔디학회지
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• 제18권3호
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• pp.129-139
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• 2004

본 연구는 피복이 한국잔디와 한지형 잔디의 늦가을과 초겨울의 녹색기간에 미치는 효과를 구명하고자 1999년부터 2001년까지 수행되었다. 한국잔디의 녹색기간 연장을 위해 대조구(Control), 비닐(Vinyl), 검정 차광망, 녹색 차광망과 피복순서에 따라 검정차광+비닐, 녹색차광+비닐, 비닐+검정차광, 비닐+녹색차광으로 처리하였다. 한지형 잔디의 녹색기간 연장을 위해 대조구, 무공 비닐 처리구 및 유공비닐 처리구로 하였다. 조사항목은 온도, 조도, 습도, 녹색도, 엽록소 함량 등을 조사하였으며, 실험구의 크기는 $2\times2$로 3반복 완전임의배치 하였다. 한국잔디 1. 최고온도는 검정 차광망 + 비닐 처리구와 녹색 차광망 + 비닐 처리구가 대조구 및 다른 처리구에 비하여 가장 높은 경향이었다. 최저온도는 대조구 및 차광망 처리구가 비닐 처리구보다 낮아 차광망 처리구들은 야간에 보온 효과가 거의 없는 것으로 판단되었다. 특히 비닐 처리구는 온도가 $10{\pm}5^{\circ}C$이하로 낮을 경우 비닐 처리구와 대조구와의 온도 차이가 없었지만 $10{\pm}5^{\circ}C$이상일 경우 비닐 처리구의 온도가 대조구보다 $10^{\circ}C$정도 차이가 나는 것으로 조사되었다. 2. 조도는 검정 차광망이 들어간 처리구가 대조구에 비해 아주 낮았고 대조구 > 비닐 > 녹색차광망 > 비닐+녹색차광망 $\fallingdotseq$녹색+비닐 차광망 > 흑색 차광망 >비닐+검정 차광망 $\fallingdotseq$검정+비닐 차광망 순이었다. 3. 습도는 차광 처리구가 대조구 보다 높았지만 차광 처리구 간의 차이는 적었다. 4. 녹색도는 10월 중순에서 11월 중순까지 비닐처리구가 우수한 것으로 나타났으나 11월 중순 이후는 비닐+검정 차광처리가 우수하였다. 엽록소 함량 역시 11월 중순까지는 비닐처리구가 비닐+차광망 처리구보다 높았으나 11월 21일 이후의 조사에서는 비닐+차광망 처리구의 엽록소 함량이 높았다. 한지형 잔디 1. 무공 비닐 처리구와 유공비닐 처리구의 온도 차이는 $4^{\circ}C$내외였으나 온도가 $0^{\circ}C$이하로 내려갈수록 대조구와 처리구의 최고 및 최저 온도차이가 감소하는 경향이었다. 2. 습도는 무공 비닐이 유공비닐보다 $15\%$이상으로 높게 나타나 무공 비닐 피복만으로 녹색기간을 연장하고자 할 경우 주기적인 환기가 필요할 것으로 판단된다. 3. 한지형 잔디의 녹색도는 무공 비닐 처리구가 대조구 및 유공 비닐 처리구보다 진하였다. 그러나 12월 22일 이후에서는 그 효과가 급격히 감소하였다. 반면 유공비닐 처리구(양파용)는 온도 유지효과가 작은 것으로 나타나 비닐의 종류, 적정 구멍 수, 간격, 크기 등에 대한 추가 연구가 필요할 것으로 판단된다. 이상의 결과 한국잔디의 녹색기간은 습도보다 온도와 조도의 영향을 많이 받는 것으로 판단된다. 또한 차광을 이용한 한국잔디의 녹색기간 연장은 10월 초순부터 11월 중순까지는 비닐피복을 하고 11월 하순부터는 비닐+검정 차광망을 피복하는 것이 효과적인 방법으로 판단된다. 반면 한지형 잔디의 초겨울 녹색기간 연장은 11월 중순부터 비닐을 피복하여 12월 중순까지 광합성을 유도하고 12월 하순부터는 검정 차광망을 피복하여 엽록소 분해를 지연시켜 준다면 동계기간 내내 일정 수준의 녹색을 유지할 수 있을 것으로 판단된다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 춘계 학술논문 발표대회
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• pp.10-11
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• 2013

Green Frame is a column-beam system formed by composite precast concrete column and beam connected with steel buried in both members. During the installation of Green columns, the columns of Green Frame, covering 3 floors per each piece and beams, the eccentricity can be observed due to the construction error and the weight of beam itself. Such eccentricity may have a little influence on a single frame, yet, it can develop critical issues to the installation of subsequent beams or beams on the upper floors in the context of a building as a whole that has multiple frames. These issues lead to delay in frame installation, decrease of productivity and increase of cost, etc. Therefore, this study presents a steel-joint connection method in order to solve the issues. The steel-joint connection method exists on slope plane and reinforcing plate in steel frame buried in composite PC members. Through this method, the issues can be resolved without requiring additional equipment or manpower.

• 한국생물환경조절학회:학술대회논문집
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• 한국생물환경조절학회 1993년도 봄 학술논문발표요지
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• pp.9-10
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• 1993

최근 농가에서 시설되는 하우스의 형태와 피복재료가 다양해지고 있으나 작물재배를 통한 검사는 미진한 실정이다. 본 연구는 91년도에 채소와 화훼 공동으로 농가보급형 하우스 모델을 설계하고 시설된 하우스에서 PET와 EVA간의 차이와 하우스형태간의 차가 절화로 이용되는 금어초와 스토크의 생육과 품질에 미치는 영향을 구명할 목적으로 수행하였다. (중략)

• Journal of the Korean Wood Science and Technology
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• 제40권5호
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• pp.319-326
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• 2012

Han-green building is one of the modernized Korean traditional buildings developed by Korea Forest Research Institute. This building was developed to increase the competitiveness of Korean traditional building using state-of-art technologies; hence Han-green building has the inherent characteristics of traditional building such as exposed wood frame in wall. Because of discontinuity in wall by the exposed wood frame, there is a concern on heat-air leaking in terms of energy performance. In this study, air-tightness of Han-green building was evaluated to investigate the influence of gaps between frames and in-fill walls. Blower door test was carried out to evaluate the air-tightness, and air-change rate (ACH50) was evaluated by averaging four set of pressurization and depressurization test. The air-change rate of Han-green house was 5.91 $h^{-1}$. To improve energy performance of Han-green house, thermal infrared images of Han-green house were taken in winter with heating to find out where the heat loss occurred. It was found that the building lost more heat through gaps between frames and in-fill walls rather than through other parts of this building. After covering all the gaps by taping, the blower door test was performed again, and the air-change rate was improved to 5.25 $h^{-1}$. From this analysis, it was concluded that the heated air can leak through the gaps between frames and walls. Therefore, when one designs the post and beam building with exposed frame, the detail design between frame and wall needs to be carefully dealt. However, Han-green building showed relatively high air-tightness comparing with other country research results.

• KIEAE Journal
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• 제13권5호
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• pp.89-96
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• 2013

Green roofs can reduce surface water runoff, provide a habitat for wildlife moderate the urban heat island effect, improve building insulation and energy efficiency, improve the air quality, create aesthetic and amenity value, and preserve the roof's waterproofing. Green roofs are mainly divided into three types : intensive, simple-intensive, and extensive. Especially, extensive roof environment is a harsh one for plant growth; limited water availability, wide temperature fluctuations, high exposure to wind and solar radiation create highly stressed environment. This study, aimed at extensive green roof, was carried out on the rooftop of the library at Seoul Women's Univ. from October to November, 2012 and from March to August, 2013. To suggest the most effective vegetation model for biodiversity and heat island mitigation, surface temperatures were monitored by each vegetation model. We found that herbaceous plants of Aster sphathulifolius, Aceriphyllum rossii and Belamcanda chinensis, shrub of Syringa patula 'Miss Kim', Thymus quinquecostatus var. japonica, Sedum species can mixing each other. Among them, the vegetation models including Sedum takesimense, Aster sphathulifolius, Thymus quinquecostatus var. japonica was more effective on the surface temperature mitigation, because the species have the tolerance and high ratio of covering, and also in water. Especially, in the treatment of bark mulching, they helped to increase the temperature of vegetation models. In the case of summer, temperature mitigation of vegetation models were no significant difference among vegetation types. Compared to surface temperature of June, July and August were apparent impact of temperature mitigation, it shows that temperature mitigation are strongly influenced by substrate water content.

• 한국산학기술학회논문지
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• 제13권2호
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• pp.893-899
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• 2012

본 논문은 경인선 백운역 및 백운역세권을 대상으로 철도에 의해 양분된 지역생활권의 단절 해소 및 철도시설 연변부지의 효율적 토지이용을 통한 입체적인 철도 환승시스템을 제안함과 동시에 철도 이용객의 편의를 도모하며 기존의 단절된 녹지축을 활성화하여 친환경적이며 안전하고, 편리한 주거환경의 개선을 통해 지역주민들의 삶을 한층 풍요롭게 하고 나아가 지역 생활권의 활성화 방안을 모색하는 것에 있다.

• 환경생물
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• 제37권3호
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• pp.293-298
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• 2019

A marine ulvalean species (Chlorophyta) was collected from the eastern coast of Korea. This species is morphologically characterized by a distromatic, dark to medium green and mostly irregularly orbicular or irregularly expanded thallus with entire or undulate margin without serrations. Vegetative cells are irregularly polygonal with distinctly rounded corners in shape, and have chloroplast completely covering the outer cell wall and one to two pyrenoids per cell. In a phylogenetic tree based on ITS (Internal Transcribed Spacer) sequences, this Korean alga nests in the same clade with Ulva sublittoralis, as a sister clade of U. californica, U. flexuosa and U. tanneri, which share the irregularly orbicular or expanded thallus normally without teeth cells. The genetic divergence between them is intraspecific within Ulva. Accordingly, it is identified as U. sublittoralis based on the morphological and molecular data. This is the first record of Ulva sublittoralis in the Korean marine algal flora.

• 한국환경복원기술학회지
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• 제24권5호
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• pp.15-23
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• 2021

This study was carried out to suggest an appropriate plant combination by evaluating the growth of flowering ground-cover plants planted with Festuca glauca 'Eljiah Blue' on the roof-top environment. As for the plant materials, Allium senescens and Chrysanthemum coreanum which are shorter than Festuca glauca 'Eljiah Blue' and Sedum takesimense and Agastache rugosa which are taller than Festuca glauca 'Eljiah Blue' were selected. Festuca glauca 'Eljiah Blue' was planted on Conrol, and Festuca glauca 'Eljiah Blue' with Allium senescens (T1), Festuca glauca 'Eljiah Blue' with Sedum takesimense (T2), Festuca glauca 'Eljiah Blue' with Agastache rugosa(T3), and Festuca glauca 'Eljiah Blue' with Chrysanthemum coreanum (T4) were planted in each experimental plot. Plant height and covering rate were measured to evaluate the growth of Festuca glauca 'Eljiah Blue'. Also, relative growth rate (RGR) of plant height, RGR of plant width, and mortality rate of the flowering ground-cover plants were estimated. Plant height and cover rate of Festuca glauca 'Eljiah Blue' was greatest in T3. RGR of plant height was greater in the order of Agastache rugosa, Allium senescens, Chrysanthemum coreanum, and Sedum takesimense. In particular, RGR of plant width was also greatest for Agastache rugosa. Mortality rates of Agastache rugosa and Allium senescens were lowest at 11%. Therefore, based on good growth of Festuca glauca 'Eljiah Blue' planted with Agastache rugosa, these results were suggested as a desirable combination of plant species for rooftop gardening.