• 유기물자원화
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• 제28권3호
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• pp.45-49
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• 2020

본 연구는 하수슬러지와 건조연료를 혼합한 혼합물에 대해 토지개량효과를 검토하기 위한 연구이다. 혼합물은 하수슬러지와 건조연료를 중량대비 1:1 비율로 혼합하여 만들었다. 1개의 대조군(0 %)부지와 혼합물을 10 %, 20 %, 30 % 시비한 3개의 비교군을 조성하였다. 토양의 유효인산 함량변화는 혼합물을 시비한 비율에 따라 상관관계가 높은 것으로 확인되었다(P<0.05). 케나프를 90일 재배 후 수확량을 비교한 결과 10 %투입된 배지에서 줄기의 길이가 대조군 대비 73 %증가를 보였으며, 잎 수확량의 경우 20 %배지에서 227 % 가장 높은 증가율을 보였다. 30 %에서는 다른 배지보다 꽃의 개화가 먼저 된 것으로 보아 성장률이 다른 배지보다 빠른 것으로 판단되며 엽록소 함량은 71.6(SPAD)으로 가장 높은 수치를 보여 조단백질의 함량이 다른 배지에 비해 높을 것으로 판단된다. 따라서 건조연료 혼합물의 투입을 통해 전체적으로 식물이 생육하기 좋은 토질로 개선하는데 효과가 있는 것으로 사료된다.

• 산업융합연구
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• 제20권12호
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• pp.87-96
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• 2022

국토교통부는 중소벤처 기업의 보유기술 및 공공기술 이전 및 사업화 지원을 위해 국토교통기술사업화지원사업을 추진하여 왔으며, 일몰제 적용에 따라 2022년부터는 후속 신규사업을 추진할 예정이다. 이러한 시점에서 후속 신규사업의 투자효과 제고 및 우수 연구기관 선정을 위해 사업목적에 맞는 타당한 평가지표 체계의 수립이 필요하다. 후속 신규사업의 평가 지표 체계는 선행사업의 사업목적 및 목표와 연계 되어야 하며, 연구성과 단절 등을 예방하기 위해 기존 평가항목 및 지표를 고려하는 것이 필요하다. 따라서 본 논문은 국토교통기술사업화지원사업 평가위원별 평가결과 데이터를 이용하여 계층적 군집분석을 통해 평가지표 체계를 다수의 시나리오로 설정하고, 구조방정식 모형 분석을 수행하였다. 시나리오 분석결과, 평가 지표 간 인과관계를 나타내는 각 경로의 측정효과와 평가항목에 미치는 평가지표별 효과를 고려하여 평가결과에 미치는 영향력이 가장 높은 시나리오를 개선방안으로 선택할 수 있었다.

• 토지주택연구
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• 제3권1호
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• pp.33-43
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• 2012

국토의 약 64%에 이르는 산지지역이 그동안 계획적이고 체계적인 관리 없이 무분별한 산지전용으로 훼손되어 왔다. 본 연구는 앞으로 산지의 공익적 기능을 유지하고, 자연친화적으로 이용할 수 있도록 하기 위하여 도입된 "자연친화적 산지이용허가제"의 기준에 대한 시뮬레이션 연구이다. 이를 위해 산지의 자연친화적 이용과 관리를 위한 방안으로 제시된 '자연친화적 산지이용 허가기준'에 대하여 85점, 100점, 110점의 조합으로 각각 시뮬레이션을 수행하여 기본 설계도 수준의 산지전용 모형을 도출하고자 하였다. 여기서 절대적 기준과 상대적 기준으로 제시된 허가기준에서 절대적 기준에 해당되는 원형존치율, 형질변경제한, 층수제한, 비우수투과율, 건축물의 길이 등의 기준에 대하여 종합점수제로 평가하여 일정 점수(100점) 이상으로 평가되는 대상에 대하여 산지전용에 대한 허가기준으로 활용할 수 있다는 가설을 설정하고 시뮬레이션을 시행하였다. 각 평가점수에 대한 시뮬레이션을 위하여 건축물의 대각선 길이를 고정변수로 설정하고 주택형태, 경사도, 조성부지의 형태에 따라 건축유형을 분류하고 각각의 활용방안을 제시하였다. 본 연구는 '민간인 통제선 이북지역의 산지관리에 관한 특별법'에 따라 민간인 통제선 이북지역에 대해서만 적용되고 있는 '생태적 산지전용제도'를 전국의 산지에 적용하기 위한 방안을 제안하기 위하여, 자연친화적인 산지이용허가제 적용기준을 활용하여 산지의 자연환경을 보전하고 계획적으로 활용하기 위한 기초를 마련하기 위한 선험적 연구이다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.1402-1403
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• 2011

Photovoltaic solar energy policy in the keynote of the world in the development of new technologies in terms of renewable energy sources has been a great interest. Solar energy is the energy density, low light intensity, temperature, and a lot of areas affected by the difference, the effective use difficult. For the installation of photovoltaic solar power systems to develop farmland or forest land resulting from deforestation has become such a problem. In this paper, a way to resolve these issues as part of the development of the reservoir water through the efficient use of land and water resources through the eco-friendly energy production, water quality improvement, the cooling effect of solar modules, solar water system has the advantage of was installed. Terrestrial solar systems installed under the same conditions and solar radiation, power, module temperature, ambient temperature and analyzed. Through this award to demonstrate the effectiveness of the solar system is.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2005년도 학술발표논문집
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• pp.170-174
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• 2005

The waste land can be changed to the land that creature can survive by the greening. The studies on the rooftop greening have increased rapidly in number since these studies have made a positive effect on the improvement of the urban ecosystem and the lacking greens environment of the city. However, the majority of research are for rooftop greening system of the public and commercial building. Therefore, the development of easily available rooftop greening system for private residences is required.

• 수산경영론집
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• 제45권2호
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• pp.85-95
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• 2014

Fish stocking is important element of land-based aquaculture management. To maintain constant stocking rate considering biological and economic condition is a convenient strategy in intensive aquaculture. This study is aimed to analyze the effect of over-stocking(more than aquaculture capacity) for certain periods of time. This study make the mathematical decision making model that finds the value of decision variable to minimize cost that sums up the water pool usage cost and sorting cost under critical standing corp constraint. The proposed mathematical decision making model was applied to 12 sample combination of sorting cost and the number of fish on the Oliver flounder culture farms. If a immature fish can be sold for high price than farming cost, restricted over-stocking resulted in a improvement of economic performance. When extensive comparable biological and market data become available, analysis model can be widely applied to yield more accurate results.

• 환경위생공학
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• 제8권2호
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• pp.25-48
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• 1993

International concern over the environmental pollution is ever increasing, and diversified countermeasures must be devised in Korea also. Global trend, damages, problems and countermeasures with respect to issues mentioned in the Rio Declaration, such as prevention of ozone layer destruction, reduction of migratory atmospheric pollution between neighboring countries, and prevention of global greenhouse effect, were discussed in this report. Conclusion of the report is summarized as follows : A. Measurement, Planning and Monitoring (1) Development and implementation of a global network for measurement and monitoring from the global aspects such factors as related to acid rain(Pioneer substances, pH, sulfate, nitrate), effect of global temperature(Air temperature, $CO_2$, $CH_4$, CFC, $N_2O$) and destruction of ozone layer($CFC_S$). (2) Establishment of network system via satellite monitoring movement of regional air mass, damage on the ozone layer and ground temperature distribution. B. Elucidation of Present State (1) Improvement and development of devices for carbon circulation capable of accurately forecasting input and output of carbon. (2) Developmental research on chemical reactions of greenhouse gas in the air. (3) Improvement and development of global circulation model(GCM) C. Impact Assessment Impact assessment on ecosystem, human body, agriculture, floodgate, land use, coastal ecology, industries, etc. D. Preventive Measures and Technology Development (1) Development and consumption of new energy (2) Development of new technology for removal of pioneer substances (3) Development of substitute matter for $CFC_S$ (4) Improvement of agriculture and forestry means to prevent the destruction of ozone layer and the greenhouse effect of the globe (5) Improvement of housing to prevent the destruction of ozone layer and the greenhouse effect of the globe (6) Development of new technology for probing underground water (7) Preservation of forest (8) Biomass 5. Policy Development (1) Development of strategy model (2) Development of long term forecast model (3) Development of penalty charge effect and expense evaluation methods (4) Feasibility study on regulations By establishing the above mentioned measures for environmentally sound and sustainable development to establish the right to live for humankind and to preserve the one and only earth.

• 국토계획
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• 제53권7호
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• pp.109-126
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• 2018

The purpose of this study is to identify the spatial types for thermal environment improvement considering heat flux and its spatial context through empirical orthodox formulas. First, k-means clustering was used to classify values of three kinds of heat flux - latent, sensible and storage heat. Next, from the k-means clustering, we defined a type of thermal environment (type LHL) where improvement is needed for more comfortable and pleasant thermal environment in the city, among the eight types. Lastly, we compared and analyzed the characteristics of each classified thermal environmental types based on land cover types. From the study, we found that the ratio of impervious surfaces, roads, and buildings of the type LHL is higher than those of the type HLH (relatively thermal comfort environment). In order to improve the thermal environment, the following contents are proposed to urban planners and designers depending on the results of the study. a) Increase the green zone rate by 10% to reduce sensible heat; b) Reduce the percentage of impermeable surfaces and roads by 10% ; c) Latent heat increases when water and green spaces are expanded. This study will help to establish a minimum criterion for a land cover rate for the improvement of the urban thermal environment and a standard index for the thermal environmental improvement can be derived.

• 미생물학회지
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• 제8권1호
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• pp.13-20
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• 1970

Chenges in respiration of the soils collected from the reclaimed tidal soil in Chogi-ri, Kanghwa Island and treated with organic matters are presented. The measurement of the respiration for the smaples, which were incubated for 0,2,4 and 5 weeks, were carried out by using Warburg's respirometer. While the respirations of the samples added by organic matters were increased 6.7 - 28.0 times compared with that 0 week during the incubation in case of 5-year soil, the respiration in case of 3-year soil were increased 3.3-11.8 times. Thus, the effect of adding organic matters on the respiration of the experimented soils, as this indicates, was much higher for the soil of 5-year area than that of 30-year area. And for the organic matters Salicornia was most effective and then Suaeda and Oryzae. The samples treated with Salicornia and Suaeda showed their highest respiration rate at the 4th week, but the one with Oryzae was measured to increase progressively during 5 weeks experimented. Regarding the salinity, content of organic matters and number of bacteria, in each intact soil experimented, 5-year soil samples had much poor habitat then 30-year soil for the activity of soil microorganisms, but according to the result mentioned above, it is firmly believed that the addition of organic matters on the saline soil is one of the best means to change the reclaimed tidal land into arable land with less time duration.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2000년도 가을 학술발표회 논문집
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• pp.41-48
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• 2000

Most land development projects and large scale civil works require a great amount of sand. And sand is also the most favorable material for soft ground improvement. The demand for sand is soaring rapidly due to increased number of projects regardless of its limited supply. Therefore, it is not difficult to predict that sand may become depleted and no longer be available as ground improvement material in the near future. Against this backdrop, developing an inexpensive sand-substitution material with an efficient accessibility will be necessary and urgently called for. So quick lime could be recommended as the substitutional material for sand. Quick lime is now preferred by forward developed nations. If Korea is able to take advantage of its abundant supply, economical efficiency could be achieved through massive production as well as being able to take advantage of utilization of natural resources. In this respect the purpose of this paper was to estimate improvement effect of soft ground though in-situ construction of quick lime pile. In-situ construction was peformed in road construction site of soft clay and in this study quick lime from Dan-yang that was estimated prominently in aspect of engineering characteristics was used. Quick lime piles were installed by 1.5m, 2.0m, 3.0m spacing to confirm improvement effect according to spacing and installed piles are 0.4m in diameter, up to 5m in length and the density of quick piles installed is 1.4 t/㎥. Vibrating wire pore water pressure cell was installed to confirm consolidation characteristics in surrounding of quick lime piles and both laboratory test and field test were carried out to confirm strength increase. In conclusion, soft ground improvement by quick lime piles was confirmed.