• Journal of the Korean Geosynthetics Society
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• v.12 no.3
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• pp.65-73
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• 2013

The information of cut slope in Mt. Jang area, Busan is investigated in order to construct the Slope Management System in Urban Area. The slope inspection sheet is made to record the characteristics for cut slopes, and that is capable to be inputted slope information systematically. The cut slopes in Mt. Jang area are consisting of 69 slopes. Most of the cut slopes are constructed in cutting slope and retaining wall (CR). The cut slopes located in housing facilities are 46 slopes, and the slopes located in school facilities are 12 slopes. The traverse of cut slopes is mainly ranged from 50 m to 150 m, and the height is mainly ranged from 10 m to 20 m. The slopes combined with soil and rock are mostly distributed. The retaining wall was installed in the toe part of cut slope in order to increase the slope stability, and the additional reinforcement methods including the anchor, drainage, preventing rock fall, shotcrete and vegetation were installed at the toe part of cut slopes.

• Korean Journal of Agricultural and Forest Meteorology
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• v.13 no.2
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• pp.93-100
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• 2011

The study was conducted to investigate the correlation analysis between fruit quality and climatic parameters in grapevines. 'Campbell Early', one of the major grape cultivars, occupies more than 70% of cultivated areas in Korea. Recent research results have shown that the movement of cultivation area of fruit production resulted from the temperature increase. In this study, we investigated the relationship between fruit quality and climatic conditions in 13 major 'Campbell Early' grape producing areas (i.e., Sacheon, Jinju, Naju, Dangjin, Cheonan, Gimcheon, Yeongdong, Okcheon, Sangju, Suwon, Yeongju, Gangneung, Chuncheon, and Yanggu). The earliest and latest full blooming days of grapevines were ovserved on May 25 in Sacheon area and on June 7 in Yanggu area, respectively. At least 90 days are required for grapes to mature enough for the production of highquality fruits. The southern areas with less than 90 days of maturity period had difficulty in the production of good fruit. However, the areas with longer maturity period of 100 to 110 days produced grapes with with high sugar content and good coloring. The fruit qualities of 'Campbell Early' grapes are more closely related with temperature than other climatic factors. High temperature resulted in fruits with high acidity and delayed the coloration of the fruit skin in the southern area. The fruit skin was thin in the southern area and inclined to be thicker in the northern areas. Therefore, grape should be cultivated in regions with long maturity period to have high quality.

• Journal of People, Plants, and Environment
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• v.23 no.6
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• pp.637-646
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• 2020

Background and objective: The main objective of this study is to measure the amount of particulate matter (PM) reduction under different characteristics of leaves in 18 different species of indoor plants. Methods: First, a particular amount of PM was added to the glass chambers (0.9×0.86×1.3 m) containing the indoor plant (height = 40 ± 20 cm), and the PM concentration were measured at 2-hour intervals. The experiment with the same conditions was conducted in the empty chamber as the control plot. Results: The range of PM reduction per unit leaf area of 18 species of experimental plants was 3.3-286.2 ㎍·m^-2 leaf, total leaf area was 1,123-4,270 cm², and leaf thickness was 0.14-0.80 mm and leaf size 2.27-234.47 cm². As time passed, the concentration of PM decreased more in the chamber with plants than in the empty chamber. Among the 18 indoor plants, the ones with the greatest reduction in PM2.5 in 2 hours and 4 hours of exposure to PM2.5 were Pachira aquatica and Dieffenbachia amoena. As the exposure time of PM increased, the efficiency of reducing PM2.5 was higher in plants with medium-sized leaves than plants with large or small leaves. The effect of reducing PM2.5 was higher in linear leaves than round or lobed leaves. Plants with high total leaf area did not have advantage in reducing PM because the leaves were relatively small and there were many overlapping parts between leaves. In the correlation between leaf characteristics and PM 2.5 reductions, all leaf area and leaf thickness showed a negative and leaf size showed a positive correlation with PM reduction. Conclusion: The PM reduction effect of plants with medium-sized leaves and long linear leaves was relatively high. Moreover, plants with a large total leaf area without overlapping leaves will have advantaged in reducing PM. Plants are effective in reducing PM, and leaf characteristics are an important factor that affects PM reduction.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.94-94
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• 2022

최근 밀(Triticum aestivum L.) 소비량이 꾸준히 증가하고 있어 국내 밀 자급률 증대를 위한 노력이 필요하다. 그러나 우리나라는 작물을 재배할 수 있는 농경지가 한정되어 있어 벼 수확 후 휴경 논을 이용하여 겨울철에 밀을 재배하거나, 하계 소득 작물과 연계하여 겨울철에 밀을 생산할 수 있는 방안을 모색할 필요가 있다. 본 연구에서는 남부지역 평야지 논을 이용하여 밭작물 중심 다모작 작부체계를 제시함과 동시에 밀을 재배하여 생육 특성과 수확량 변화를 살펴보았다. 단위면적당 수수 및 종실 수량은 작부이력에 밭작물이 포함된 다년 다모작 작형(들깨-IRG-참깨-밀, 콩-IRG-참깨-밀)이 다년 벼-밀 이모작이나 벼-IRG-참깨-밀 다모작에 비해 많았으며, 특히 들깨와 콩이 포함된 작부체계에서 많았다. 밀 품종 간 비교에서는 금강밀이 조경밀에 비해 출수기와 성숙기가 2~3일 빨랐지만 종실 수량은 100 kg/10a 이상 적어, 동일한 환경조건에서 조경밀이 금강밀에 비해 곡물 생산성 측면에서 유리할 것으로 보인다. 더군다나 조경밀은 조숙 다수성 경질밀로 전국에 재배가 가능하고, 단백질 함량이 높고 강력분의 특성을 보여 제빵용으로 많이 활용되고 있다. 본 연구에서 조경밀은 단백질이 10% 이하로 낮고 아밀로스는 28.4%로 높은데 반해, 금강밀은 단백질이 11.0%로 높고 아밀로스는 26.6%로 낮아 제과·제빵에 있어서, 금강밀이 좀 더 유용할 것으로 보인다. 밀가루의 Falling number는 조경밀과 금강밀 모두 350초 이상으로 높아 수발아로 인해 전분의 분해가 일어나지 않은 건전한 상태의 곡립임을 알 수 있다. 그리고 gluten 함량도 조경밀과 금강밀 모두 유사하게 높았으며, gluten 지수는 금강밀이 좀 더 높았다. 이상의 결과를 토대로 밀 수확량을 증가시키기 위해서는 기존의 벼-밀 이모작 보다 들깨-IRG-참깨-밀이나 콩-IRG-참깨-밀 등의 다년 다모작 작형이 좀 더 유리할 것으로 보인다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.80-80
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• 2022

본 연구에서는 남부지역 논의 이모작 작부체계로부터 생산한 국산밀의 품질 특성을 살펴보았다. 벼 및 이의 대체작물(검정콩, 참깨, 들깨)과 연계한 작부체계별로 생산된 국산밀의 제분율은 모든 토양에서 70% 이상으로 높았으며, 밀가루의 색상은 전작 작물의 종류에 따라 색도(L^*, a^*, b^*) 값과 백색도 지수가 변화하였다. 특히, 흰색의 정도를 나타내는 L^*값과 백색도는 벼 전작 토양에서 수확한 밀에서 높았다. 그러나 다량 및 미량 영양소 함량은 벼 전작물 토양에서 수확된 밀에서 낮았고 대체 작물을 전작한 토양에서 생산한 밀에서 대체로 높았다. 다량 영양소 중 P와 Mg의 함량과 미량 영양소 중 Zn와 Cu의 함량은 검정콩을 전작한 토양에서 수확한 밀에서 특히 높았다. 국산밀의 회분, 단백질, 아밀로스와 손상전분 함량은 각각 0.45-0.59%, 7.7-9.5%, 22.3-24.0%와 5.0-5.9%이다. 국산밀 중에 조경밀은 단백질 함량이 다른 품종에 비해 높고 질이 우수하여 제빵용으로 이용되고 있는데, 본 연구에서는 작부체계에 관계없이 전체적으로 10% 이하로 낮은 특성을 보였다. 그나마 검정콩을 전작한 토양에서 수확한 밀에서 9.45%이며, 벼를 전작한 토양에서는 8.0% 이하로 극히 낮았다. 또한 SDS-침전가도 검정콩 전작 토양에서 수확한 밀에서 높았으며, 회분 함량은 0.6% 이하로 1등급에 해당되었다. 논토양에서 참깨나 콩, 들깨 등의 벼 대체 작물들의 전작은 토양의 물리화학적 특성을 개선하고 제빵공정에 좀 더 유리한 고품질의 밀을 생산하는 데 이바지할 수 있음을 보여준다. 그러나 검정콩-밀 작부체계의 생육일수(344일)가 벼-밀(331일), 들깨-밀(337일), 참깨-밀(310일) 보다 길어 앞뒤 작물의 작기 연결성에 있어서 여유가 없었으며, 기상환경의 변화에 따라 검정콩의 수확시기가 늦어지게 되면 밀 파종 시기와 겹칠 수 있는 우려가 있다. 차후에 시비 기준을 달리한 조건에서 밀의 생산성 증대와 더불어 최고 품질의 밀을 생산할 수 있는 체계를 확립하고자 한다.

• Proceedings of the Korean Magnestics Society Conference
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• 2007.05a
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• pp.149.2-149.2
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• 2007

• The Korean Journal of Quaternary Research
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• v.21 no.2
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• pp.68-68
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• 2007

• Economic and Environmental Geology
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• v.44 no.6
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• pp.551-563
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• 2011

• Journal of Environmental Health Sciences
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• v.24 no.1
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• pp.87-97
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• 1998

This study was performed to investigate the Natural mineral water quality at 47 sites in Chonnam area, samples were collected spring, summer, fall, winter for a seasonal variation in 1996. The results obtained were summarized as follows 1. The mean of F, pH, HCO$_3$, NO$_3$ -N were 0.19 mg/l, 6. 9, 34.99 mg/l, 1.40 mg/l and those of Na, K, Ca, Mg were 12.1 mg/l, 1.2 mg/l, 7.7 mg/l, 2.1 mg/l respectively. 2. The contents of F were reasonable at Multonggol as 1.35 mg/l and Yongbayui as 0.57 mg/l respectively, but there is no detected at Sidong and detected below 0.1 mg/l at Gubongsan, Hansansa area. 3. According to the geological effect, the content of F was showed higher in granite than in tuff, and index of pH was higher in tuff than in andesite, and content of HCO$_3$ was higher in andesite than in granite. 4. The K and O values were used as index of healthy and delicious water. As a result, thirtyfive sites(74.5%) was decided as healthy and delicious water. 5. The contents of NO$_3$-N were detected over 5 mg/l at Sukchonsa, Gajanggol, Yudalsan, Muchang, Kisan.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.11
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• pp.1641-1646
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• 2017

This paper presents a fast method to identify an area of severity which is a network area leading to voltage sags at multiple sensitive load points, simultaneously. To assess voltage sag performance considering various sensitive loads, it is need to determine an area of severity for the load points. The area of severity can be calculated by overlapping areas of vulnerability for each sensitive load. However, as the number of sensitive loads increases, computational complexity and time for determining an area of severity are highly increased. In this paper, an efficient scheme based on line division is described. The proposed method is useful for identifying an area of severity and assessing voltage sag performance considering multiple loads together.