• 현장농수산연구지
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• 제6권1호
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• pp.81-89
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• 2004

포도 "캠벨얼리" 송이에 새로 개발된 봉지를 괘대하여 봉지 내부의 미기상의 변화, 생리장해 및 병 발생, 과실품질, 수확기 판정의 편이성을 조사하였다. 개발봉지의 미기상은 온도 및 광투과율은 차이가 없었으나, 상대습도 및 봉지 표면의 수분 증발량은 변화를 주었다. 수정불량과, 착색불량과, 동녹 발생율 및 회색곰광이 발생율은 처리 간 큰 차이가 없었다. 열과 및 탄저병 발생은 무대과에 비하여 개발봉지가 현저히 감소하였다. 특히 탄저병 발생정도는 개발봉지가 현저히 덜 심하였다. 과방, 과립 및 과경의 생장 및 가용성고형물, 산 함량, 과색과 과분 발생에는 큰 차이가 없었다. 개발봉지는 수확기 판정의 편이성이 우수하였으며, 과색 및 과분 발생정도가 높아 과실의 품질을 향상시킬 수 있었다.

• Journal of Electrical Engineering and Technology
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• 제13권1호
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• pp.513-520
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• 2018

Since Paris Climate Change Conference in 2015, many policies to reduce the emission of greenhouse gas have been accelerating, which are mainly related to renewable energy resources and micro-grid. Presently, the technology development and demonstration projects are mostly focused on diversifying the power resources by adding wind turbine, photo-voltaic and battery storage system in the island-type small micro-grid. It is expected that the large-scaled micro-grid projects based on the regional district and town/complex city, e.g. the block type micro-grid project in Daegu national industrial complex will proceed in the near future. In this case, the economic cost or the carbon emission can be optimized by the efficient operation of energy mix and the appropriate construction of electric and heat supplying facilities such as cogeneration, renewable energy resources, BESS, thermal storage and the existing heat and electricity supplying networks. However, when planning a large residential town or city, the concrete plan of the energy infrastructure has not been established until the construction plan stage and provided by the individual energy suppliers of water, heat, electricity and gas. So, it is difficult to build the efficient energy portfolio considering the characteristics of town or city. This paper introduces an energy mix optimization(EMO) method to determine the optimal capacity of thermal and electric resources which can be applied in the design stage of the real large-scaled residential town or city, and examines the feasibility of the proposed method by applying the real heat and electricity demand data of large-scale residential towns with thousands of households and by comparing the result of HOMER simulation developed by National Renewable Energy Laboratory(NREL).

• 한국지리정보학회지
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• 제15권4호
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• pp.124-137
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• 2012

기후분석은 도시 쾌적도를 고려하는 도시계획에 있어 중요한 요소 중 하나이다. 도시지역의 기후는 종관규모보다 작은 국지규모의 기후 영향을 받는데, 본 연구에서는 도시 안에서의 야간 지면냉각과 찬공기 생성 및 유입의 효과를 분석함으로써 도시지역의 국지기후에 대한 영향을 정량화 하고자 하였다. 서울관측소 풍속에 미치는 종관 기상의 영향은 30%정도인 반면, 관측소 주변의 지형 건물 열적 현상의 영향은 70%정도인 것으로 나타났다. 또한 서울 은평구 뉴타운의 연구지역에 대하여 서울기후분석(CAS, Climate Analysis Seoul) 모델로 분석한 결과, 국지영향 기온편차 분포에서 토지피복률에 따라 도시 및 도시외곽 지역의 기온 특성이 함께 존재하고 있음을 보여주었다. 또한 고밀도 관측 자료로부터 각 지점들의 시간대별 열적반응이 국지영향 기온편차 분포와 일치함을 알 수 있었다. 관측지점들 중 실개천을 따라 설치된 지점들의 일변동은 유사하게 나타났는데, 인근 산으로부터 경사면을 따라 유입된 찬공기의 생성, 이동, 정체는 관측된 수직기온경도를 이용하여 표현되었다. 실개천의 입구에서 관측된 수직기온경도는 지면 냉각에 의한 것과 외부로부터의 찬공기 유입이라는 두 가지로 설명될 수 있다. 지면냉각은 풍속과 관계없이 존재하지만, 찬공기 유입에 의한 냉각효과는 풍속이 낮을 때만 일어났다. 풍속의 강약에 따른 회귀분석식을 이용하여, 찬공기 유입 냉각효과는 국지적인 지면 냉각의 84%였다는 것을 밝혔다. 본 연구를 통해 지역특성이 국지기후에 미치는 영향의 크기를 기존의 정적인 기온영향 분석에서 동적인 찬공기 유입분석으로 확장하였다. 이 연구를 바탕으로 앞으로의 기후분석에서는 도시민의 쾌적도를 지원하기 위한 도시개발계획의 찬공기 특성 변화를 분석할 수 있게 될 것이다.

• 대한원격탐사학회지
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• 제11권3호
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• pp.83-100
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• 1995

한국의 수도권 지역에서는 토지이용의 변화가 근래 급격하게 이루어지면서 국지기후에도 변화가 나타나고 있다. 본 연구는 지난 20년간의 토지이용변화의 특성 및 규모를 분석하여 이 변 화가 국지기후에 미치는 영향을 파악하고자 하였다. 연구지역에서의 도시화는 상당히 빠른 속도 로 진행되고 있어 현시점에서는 토지이용변화의 규모를 지도나 문헌조사 만으로는 충분히 조사할 수 없기 때문에 본 연구에서는 Landset 자료를 이용하여 토지이용 변화의 양상 및 규모를 밝히 고,기상자료(온도, 습도, 안개 등)의 시계열적 분석으로 토지이용의 변화가 국지기후에 미치는 영 향을 파악하고자 하였다. 그러나 측후소에서 관측된 기상자료 만으로는 기상요소의 공간적 분포 를 이해할 수가 없기 때문에 NOAA AVHRR 열적외선 자료를 이용하여 온도의 공간분포를 규명 하고, GIS 기법을 활용하여 시각적 효과를 높이므로써 지역정책을 수립할 때 의사결정에 도움을 주고자 하였다. 분석결과에 의하면 수도권지역의 녹지는 지난 20년간(1972-1992)에 94%에서 62% 로 감소된 데 반하여 도시적 토지이용은 4%에서 39%로 크게 증가되었다. 토지이용의 변화에 따 른 생물자원의 감소는 열수지 및 수분수지에 변화를 초래하여 국지기후 내지 미기후에 영향을 미 칠 것을 암시하고 있으며, 실제로 연구지역내의 국지기후는 점차 건조화.온난화 추세를 보이고 있 다. 그러므로 인간의 활동이 국지기후에 미치는 바람직하지 못한 영향과 위험한 오염을 효율적으 로 저감시키려면 토지이용의 변화가 환경에 미치는 영향에 관한 보다 깊은 연구가 절실히 요청된다.

• Wind and Structures
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• 제7권3호
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• pp.159-172
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• 2004

The study of how buildings affect wind flow is an important part of the research being conducted on urban climate and urban air quality. NJU-UCFM, a standard $k-{\varepsilon}$ turbulence closure model, is presented and is used to simulate how the following affect wind flow characteristics: (1) an isolated building, (2) urban canyons, (3) an irregular shaped building cluster, and (4) a real urban neighborhood. The numerical results are compared with previous researchers' results and with wind tunnel experiment results. It is demonstrated that the geometries and the distribution of urban buildings affect airflow greatly, and some examples of this include a changing of the vortices behind buildings and a "channeling effect". Although the mean air flows are well simulated by the standard $k-{\varepsilon}$ models, it is important to pay attention to certain discrepancies when results from the standard $k-{\varepsilon}$ models are used in design or policy decisions: The standard $k-{\varepsilon}$ model may overestimate the turbulence energy near the frontal side of buildings, may underestimate the range of high turbulence energy in urban areas, and may omit some important information (such as the reverse air flows above the building roofs). In ideal inflow conditions, the effects of the heights of buildings may be underestimated, when compared with field observations.

• 한국조경학회지
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• 제31권5호
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• pp.43-57
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• 2003

This paper presents the air corridor planning strategy based on simulation with MUKLMO_3 (Micro-scale Urban Climate Model) to investigate the wind field and air corridor caused by the land-use change of the New Town Development Area in Pan-Gyo. In the first part, the most frequently observed wind field in the New Town Development Area was measured and used as an initial value to simulate a more realistic wind field and air corridor. Several experiments with different initial values of wind fields were carried out to investigate the wind field change affected by the New Town Development. The results show the features of the wind field of the neutral stability condition in the urban canopy layer with a high resolution near the ground. The wind speed is weakened at this level due to the New Town Development. It was found that the wind field and air corridor are influenced by the land-use change. After the development of the New Town, the speed of the wind field decreased and the main wind directions and air corridor changed. In this study, this model is found to be a useful tool for evaluating air corridor and change of wind field in speed and direction.

• 한국소음진동공학회논문집
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• 제16권2호
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• pp.141-148
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• 2006

Korean traditional houses have been evolved and developed in many years, adopting the natural environment to control exterior conditions. These control method are various Passive system of using natural materials, considering micro climate, building lay out, and these system are much natural and ecological to make the comfortable indoor climate than active systems of the present houses. This study aims to analyzed the acoustical characteristics of Korean traditional houses varied with lay out and floor plan to reflect the way of control for environmental condition. The reverberation time and level difference between rooms of the main living room and other main floored room, master room and kitchen are measured in each houses. As a result, the reverberation time of Korean traditional rooms are below 0.6 second, and the sound insulation performance of Korean traditional door are mostly very low grade with D-15. The level difference between rooms are low grade not to meet minimum class except between main living room and master room away from main living building. These above results show that our traditional house are much more emphasized seeking visual privacy of rooms than aural privacy.

• 한국디지털건축인테리어학회논문집
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• 제7권2호
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• pp.9-17
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• 2007

After 20th century, The using of data tend to important in a sphere of architecture. The recent European including MVRDV, Rem Koolhaas, Van Verkel and Zaha Hadid tend to the their own design strategy based on the objective data. This architectural design method leads to make new paradigm of contemporary architecture. For the purpose of the understanding a part of new architecture paradigm(datascping), I will analyze the relation of Thing system and Formation system in 36 works of MVRDV from 1992 to 2006. As a results are as follows. The purpose The results of this research are as follows: First, The physical and social elements(Thinking system) are density of site, networking, lighting & vista, micro-climate, energy, noise & vibration, life style, city, communication and variety. Second, The Formation system is layering & stacking, open & close, folding & extending and eco-friendly design. Finally, the major matrix of MVRDV's works is pragmatic and systematic approach to the lighting, climate and variety of community.

• 한국지역사회생활과학회지
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• 제20권4호
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• pp.515-522
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• 2009

This study was to develope the functional work clothing for livestock farmers. Major demanding performances for livestock work clothing are anti-soil and anti-bacterial properties. On surveys, functional fabrics that have anti-soil, anti-bacterial and waterrepellent performances were developed and the work clothing that have adaptability to body movements were manufactured. The designs of livestock working clothes were two piece and one piece with rubber bade in waist. The thermal responses of subjects wearing the winter working clothes for stock farming worker were measured in the climate chamber($17^{\circ}C$, 40% R.H.). The main results were summarized as follows: Total body weight loss was smaller and the mean skin temperature was higher in developed clothes than the market product. Clothing micro-climate of developed clothes was lower than the market clothes. Subjective sensation did not have significant differences. From the results of various evaluation, developed garments for livestock workers showed better efficiency than the market product.

• 한국태양에너지학회 논문집
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• 제39권6호
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• pp.67-82
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• 2019

This study aims to examine the impacts of built environmental features on the nocturnal and diurnal temperatures during the heat wave season in Gwangju, Korea. Built environmental measures are summarized at micro-scale level, such as 50 meters and 100 meters from temperature monitoring spots. Regressing the built environment on nocturnal and diurnal temperatures, we estimate how the artificial constructs contribute to temperature either day and night times. We found that impervious surface ratio is positively and negatively associated with nocturnal and diurnal temperatures, respectively. Buildings and structures tend to construct high thermal mass and absorb heat during day time and emit it for the night time. This property contributes to the nocturnal temperature model. On the other hand, urban areas with more vertical structure tend to block sun radiation more than rural, and it is more likely to find the negative relationship between impervious surface ratio and the diurnal temperatures.