• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.12
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• pp.523-531
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• 2018

The purpose of this paper is to derive priorities and implications for the organic resource conservation policy in the livestock sector. We conducted a survey on the importance-performance of the organic waste resource reclamation of livestock sector using a 5-point Likert scale. The importance average for the resource recycling of livestock organic waste was 3.63 and the average of performance was 3.04. As a result of the IPA on livestock manure recycling measures, it is necessary to improve feed quality, establish a local recycling system, increase demand for compost and liquid, enhance customer linkages, and develop cost reduction technologies. It requires intensive support for promoting the spread of odor reduction technologies and integrated management of biomass. It is necessary to introduce mid- and long-term measures such as the revival of feed in tariff, promote by-product feeding, establish solid fuel process management standards, create hygiene safety standards, develop eco-beads and promotion of feed conversion. It is required to strengthen support for the development of odor reduction technologies and prepare consultative organizations among related departments, develop eco-friendly solid fuel technology, and support policies for renewable energy certification.

• Journal of Korean Society of Rural Planning
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• v.28 no.1
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• pp.81-87
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• 2022

This study analyzed the awareness and demand of participants in a physical activity therapy program(PATP) of a social welfare-type cultural regeneration space in urban and rural areas. As a result of analyzing the demographic characteristics, the female(68.4%) were more than the male, and 30-39 years old(53.3%) were the most generation in the PATP participants. As a result of frequency analysis by all subjects, gender and age, 78.4% of the respondents had never participated in PATP before. The most duration of the PATP was 30 to 60 minutes(24.6%). 73.5% of the respondents answered that it was not feeling difficult at all to the intensity of PATP, and 94.8% of the respondents were satisfied with the intensity of PATP. The most respondents preferred to participate again with if the new PATP starts(97.2%) and to join the new PATP with his or her family members(85.7%). In addition, the participants under the age of 39(24.3%) perceived that the effect of improving physical fitness by PATP was higher than over 40 years of age(11.9%). As a result of logistic regression analysis, it was found that only the age had a significant effect(p<.01) on intensity of PATP. It means that the perceived intensity of PATP was different between the older and young generation. However, the PATP was not designed to meet the participants age and fitness levels, and even the general exercise prescription guidelines based on professional scientific data such as exercise frequency, exercise intensity, exercise time, exercise type, and characteristics of the participants in the spaces. In conclusion, to encourage and promote the participants motivation and health-related fitness level in the spaces for the future. The various type of PATP that include a few different intensities for all genders and age groups, and a customized program based on systematic and scientific exercise prescription guidelines.

• Korean Journal of Agricultural Science
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• v.38 no.2
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• pp.349-360
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• 2011

The international oil price have being fluctuated due to the exhaustion of fossil energy problem became big social issue. Rural villages are relatively sensitive to the energy problem, reflecting the characteristics of rural sustainable and stable introduction of renewable energy sources that are available is essential. In addition, through the influx of young workers in rural areas to regain vitality, efforts to improve rural living environment has been under the rural newtown project. In this study, a survey aimed at rural dwellers through the AHP, interview to report of realization about renewable energy and review the current policies. The results of realization survey though AHP are as follows, (1) the advantage of the natural environment (2) the superiority of government supporting policy and being economic, (3) easy to use, (4) ecologically stable, and (5) policy stable, respectively. In addition, renewable energy sources among the inhabitants of rural areas by solar energy was the highest score. The impact of regional characteristics compared with other energy sources receive little, easy to apply and has already been considerable technological development is considered.

• 한국방재학회:학술대회논문집
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• 2011.02a
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• pp.191-191
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• 2011

최근 빗물이 우리가 앞으로 이용할 수 있는 수자원이라는 사회적인 인식의 변화와 함께 빗물이용이 더욱 요구되어졌다. 특히 빗물의 이용 저류 침투를 목적으로 하는 우수 관리에 대한 관심이 증가하면서 빗물이용시설의 설치, 운용의 필요성이 대두되고 있다. 이에 반해 화재발생은 해마다 증가하고 있으며, 화재 증가는 소방력 활동의 증가로 귀결되는데 현장활동 인력과 장비 그리고 화재를 진압하는데 사용되는 소방용수 증가를 의미한다. 따라서 본 연구는 빗물을 소방용수로 즉, 화재진압시 활용 가능성과 수자원 절약, 화재 사각지역 해소 측면을 살펴보기 위해서 통계분석, 현장조사, 기존 빗물이용시설 및 향후 완공 예정인 우수유출저감시설 활용과 소방용수 미설치 지역과 소방관서 옥상에 빗물이용시설 설치 방안을 제시하였으며, 그에 따른 공공서비스 확대와 경제성 분석을 통하여 다음과 같은 연구결과를 도출하였다. 첫째, 기존 빗물이용시설을 소방용수로 적극적으로 활용해야 한다. 빗물이용시설의 주 용도로 조경용수, 청소용수, 소방용수로 나눌 수 있는데 이수 측면에서 화재가 발생하지 않으면 소방용수로서 이용이 거의 없는 실정이다. 이는 해당 건물관계자나 소방대원들이 빗물이용시설을 인식을 못하고, 사용과 접근성 불편으로 상수도와 연결된 소화전에 의존하는 경우가 많다고 본다. 둘째, 상수도시설이 없는 지역은 빗물이용으로 소방용수를 확보해야 한다. 섬, 산간, 고지대, 농촌지역 등 상수도 서비스를 공급받지 못하는 지역은 화재발생시 수원확보곤란으로 인명과 재산피해의 증가요인으로 작용할 수 있다. 공공서비스 확대차원에서 화재 사각지역을 해소하기 위해 지붕면을 이용한 각 가정마다 또는 공동 빗물저장소와 지형의 비탈면을 이용한 빗물이용시설 설치로 소방용수 확보의 필요성을 확인했다. 셋째, 소방관서 신설시 빗물이용시설을 도입하여 설치한다. 화재통계와 현장조사를 통하여 소방차 출동대기부터 화재진압까지 많은 양의 물이 사용되는 것으로 파악되었다. 대부분 먹는 물 즉, 상수도를 이용한다는 점에서 수자원 절약과 화재진압에 사용된 물은 재생 불가능이라는 환경보전 측면에서 빗물이용으로 해답을 찾아본다. 따라서 빗물을 많이 저장할 수 있도록 옥상, 부지 등 집수면적을 확대하고 이에 적합한 저류시설을 갖춘 빗물이용시설을 설치한다. 끝으로 신속하고 효율적인 화재진압이 중요한 만큼 빗물을 소방용수로 활용하고자 할 때는 언제 어디에서나 현장 접근성, 사용 편리성, 충분한 수량을 고려해야한다.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2007.05a
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• pp.375-379
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• 2007

폐비닐 여재(Synthetic Waste Polyethylene Media)를 적용한 부착성장식 공정의 유기물 및 질소${\cdot}$인 제거특성에 관한 Pilot Plant 실험 결과 다음과 같은 결론을 얻을 수 있었다. 1) 제거효율은 $RUNI1{\sim}3$에서 $COD_{cr}$ 91.4, 92.4, 93.9%, T-N 56.9, 61.4, 65.1%, T-P는 모든 단계에서 약 45%이상 제거되어 부하변동시에 강한 대처능력을 나타내었다. 2) BOD용적부하 $0.18{\sim}0.40kg/m^3{\cdot}d$, COD용적부하 $0.28{\sim}0.53kg/m^3{\cdot}d$, ${NH_4}^{+}-N$용적부하 $0.12kg/m^3{\cdot}d$을 나타내었다. 3) 도시하수 처리를 위한 생물학적 질소 및 인 제거공법을 본 여재를 이용하여 공정설계시 고려할 사항들과 적절한 대처방법을 다음과 같이 제시할 수 있다. - 1차 침전지에서 유기질소 및 유기인 농도가 높다면 유기질소 및 인 부하량을 감소시키기 위하여 1차 침전지를 설치하되 질소 및 인제거에 유리한 $BOD_5/T-N$, $BOD_5/T-P$를 유지할 수 있도록 체류시간을 1시간미만으로 설계하는 것이 경제적이라고 판단된다. 만일 유기질소와 유기인의 함량이 낮다면 1차 침전지는 제외하는 것이 유리할 것이다. - 여재의 배치는 폭기조에서 용존산소의 균일분포와 슬러지의 적정탈리를 위해 여재를 상하로 배치하거나 또는 여재끼리 일정 간격을 두어 배치하는 것이 바람직하다. 농촌에서의 처분이 문제시 되고 있는 폐비닐을 적용한 본 연구에서의 수처리특성은 기존 하수처리공정에서의 제거효율에 상응하는 처리특성을 나타내었다. 또한 폐비닐 처분의 문제를 해결할 수 있을뿐만 아니라 하수처리시에도 부하변동 등에 강한 대처능력을 나타내어 기존의 하수처리공정에 대체가능성을 나타내었다.

• Proceedings of the Korean Institute of Resources Recycling Conference
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• 2004.05a
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• pp.109-113
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• 2004

In this study, we tried to develop the moveable instrument for fuel of cement production by using waste plastics from agriculture that was not recycled. First we investigated the burning character of recycled fuel and feasibility of second pollution. Then we made the instrument which can produce the solid fuel under 1cm size. In changing the inputting method from pre-heater to main burner, this reduces the NOx and O2 emission rate. and When we input it 0.5ton/hour, we obtain 0.2-0.3 ton/hour reduction of coal amount.

• Korean Journal of Agricultural and Forest Meteorology
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• v.22 no.3
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• pp.144-151
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• 2020

Agrivoltaic systems (AVS) is defined as combining farm-grown crops with photovoltaic panels (PV) installed several meters above the ground. Solar radiation (W/㎡), photosynthetic photon flux density (PPFD, µmol/㎡/s), air temperature (℃), vapor pressure (kPa), soil moisture (㎥/㎥), soil temperature (℃), wind direction (˚), and wind speed (m/s) were measured under the AVS in Boseong-gun during winter barley season. Data was collected by 5 minute interval. All data can download at Github site (https://github.com/chojaeil/AVS_Boseung). To gap-filling missing solar radiation data during about two weeks, the conversion coefficient from solar radiation to PPFD was estimated as 0.41. Further, according to the ratio of diffuse radiation to direct radiation, the maximum value among the twenty PPFD sensors under the AVS was related to the PPFD value of filed.

• Journal of The Korean Society of Grassland and Forage Science
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• v.26 no.3
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• pp.171-176
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• 2006

This experiment was carried out to breed the cold-tolerant variety of Italian ryegrass(Lolium multiflorum Lam.) in Grassland and Forages Division, National Livestock Research Institute, RDA, Suwon from 1987 to 2005. New variety, Kowinner as a tetraploid variety was dark green in leaf color and growth habit in autumn and early spring was semi-prostrate and medium, respectively Kowinner as a medium or late-heading variety was 19th May in heading date. Flag leaf length of Kowinner was 29 cm that was the same as control variety, Hwasan 101. Length of longest stem and plant length of Kowinner were 70 cm and 97 cm that was longer 3 cm than those of Hwasan 101, respectively. Stem width of Kowinner was thicker than that of Hwasan 101. Expecially, Kowinner was very good in regrowth. Cold tolerance of Kowinner was slightly weaker than that of Hwasan 101 and slightly stronger than that of Florida 80. Dry matter(DM) yield(12,884 kg/ha) of Kowinner was 8% more than that of Hwasan 101. In vitro dry matter digestibility and total digestible nutrient(TDN) of Kowinner were 76.2 and 63.3% that was 1.6 and 0.4% lower than those of Hwasan 101, respectively.

• Journal of Bio-Environment Control
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• v.32 no.3
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• pp.181-189
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• 2023

Hydrogen has gained attention as an environmentally friendly energy source among various renewable options, however, its application in agriculture remains limited. This study aims to apply the hydrogen fuel cell triple heat-combining system, originally not designed for greenhouses, to greenhouses in order to save energy and reduce greenhouse gas emissions. This system can produce heating, cooling, and electricity from hydrogen while recovering waste heat. To implement a hydrogen fuel cell triple heat-combining system in a greenhouse, it is crucial to evaluate the greenhouse's heating and cooling load. Accurate analysis of these loads requires considering factors such as greenhouse configuration, existing heating and cooling systems, and specific crop types being cultivated. Consequently, this study aimed to estimate the cooling and heating load using building energy simulation (BES). This study collected and analyzed meteorological data from 2012 to 2021 for semi-enclosed greenhouses cultivating tomatoes in Jeonju City. The covering material and framework were modeled based on the greenhouse design, and crop energy and soil energy were taken into account. To verify the effectiveness of the building energy simulation, we conducted analyses with and without crops, as well as static and dynamic energy analyses. Furthermore, we calculated the average maximum heating capacity of 449,578 kJ·h^-1 and the average cooling capacity of 431,187 kJ·h^-1 from the monthly maximum cooling and heating load analyses.

• Korean Journal of Plant Resources
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• v.10 no.1
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• pp.100-104
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• 1997

A new baekji(Angelica dahurica Bentham et Hooker) variety, Baekji l, was developed through a pure line selection at the Gyeongbug Provincial RDA during the period of 1990 to 1995. The variety was characterized to have high plant height. Long root length and large root diameter as compared with a check varicty of Bonghwa baekji but emergence date, flowering date and leaf number of Baekji l was similar to that of the check variety, and it was also more tolerant to nematode and heat stress. Peeled root color of Backji l was yellowbrown but number of the lateral root of the variety was greater. The dried-root yield of Baekji l in yield trial, regional adaptation trial and farmer's field trial was always $21\sim31%$ higher than that of the check variety.