• Journal of the Korean Recycled Construction Resources Institute
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• v.6 no.4
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• pp.252-258
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• 2018

A larger energy consumption and concentration of population induced green house gas glowing and heat island effect in the urban space. Roof green system was a effect method to reduce green house gas and heat concentration in the city. Therefore, construction of this system was increasing. Most of lightweight soil used in roof green system was perlite, but this caused dust and skin disease. So it needed to develop another new lightweight soli for roof green system. Meanwhile, a thermoelectric power plant generated bottom ash as a by-product. According to previous research, bottom ash could be used for artificial lightweight soil with 60 wt% of mixing rate. But this study was proceed to develop a artificial lightweight soil using bottom ash with higher mixing rate by 65 wt% and different organic ingredients. First, physical and chemical properties of bottom ash was investigated. Then test according to landscaping design standard was proceeded for various artificial lightweight soil mix types using bottom ash, bark, compost and coco peat. As a result, the artificial lightweight soil with 65% of bottom ash, 30% of bark and 5% of compost was suitable for low and middle range of soil standard.

• Journal of Practical Agriculture & Fisheries Research
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• v.23 no.1
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• pp.59-66
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• 2021

This study aimed to a basic research for the development of dye-sensitized solar cells that the wavelength band required for crop growth is passed, and the wavelength band that is not necessary for crop growth can be used for the generation of electricity. The transmissivity according to the illuminance was about 10% higher in the Blue filter and the Green filter than in the Red filter, but the transmissivity according to the PPFD was about 10% higher in the Red filter and the Blue filter than in the Green filter. In addition, the greenhouse attached with 30% infrared blocking filter was predicted to have a lower air temperature than other greenhouses, but it was investigated that there was no significant difference. Therefore, it was investigated that the application of the infrared cut filter would not be appropriate in a greenhouse that controls the temperature by opening a window. As a result of investigating, it was found that the Green and Blue filter greenhouses had the severe overgrowth and the stems grew weaker. The fresh weight of paprika in the infrared blocking filter greenhouse was the highest at 678.9g, and the growth of Red filter and the control greenhouses was relatively poor. Photosynthetic rate, amount of transpiration, and stomatal conductivity were the infrared blocking filter and control greenhouse higher than others. On the other hand, the water use efficiency did not show a big difference.

• Journal of the Korean Institute of Rural Architecture
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• v.6 no.3
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• pp.25-38
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• 2004

The government has made a great effort for the development of rural area. The aim of this study is to analyze the change process and characteristics of the government's rural area development policies implemented so far and present an aid as adequate material to the direction of development policy for rural areas. The rural area development policy had been focused on maintenance of physical infrastructure facilities in the rural areas, pursuing urban convenience led by the government from the 1950s to 1990s. The policy has changed to local residents-led rural area development from the late 1990s to present time. The basic direction of the policy turned into making much of environment-friendliness and promotion of regional activation. The policy was transformed to recognize our rural area and also perceive it pastoral and resting space. In addition, green tourism has emerged as an important theme since 2000. In the rural area development policy, it is the most important to connect it with various development projects, select target areas from the long-term perspective and pursue efficiency through intensified investment of financial resources.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 1999.10a
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• pp.141-152
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• 1999

This study aims at advancing waterfront planning and development of North Harbor of Pusan and attempting to establish an identity through the analysis and case studies of waterfront development of foreign countries. This study is based on Pusan urban harbor plan and the case study which was investigated the relational port with an urban area to find a model of development method and procedure of urban waterfront renewal, The approach of this study is to classify diversified cases and to suggest elements after reviewing successful cases. The point in the waterfront development plan of North Harbor of Pusan is how to secure an amenity on the edge and provides a comprehensive theoretical base such as skyline, coastline, green area, accessibility, scenery, landmark, open space, and so on. The result of this study is useful for the planner to develop more and systematic approaches which could utilize waterfront. Waterfront development will be a new chance of urban development for Pusan.

• Korean journal of applied entomology
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• v.12 no.1
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• pp.47-53
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• 1973

Experiments were conducted to study resistance of rice varieties originated from Korea·and IRRI-sources to the green rice leafhopper, Nephotettix cincticeps UHLER. The nature of varietal resistance to the insect was evaluated from the viewpoints of ovipositional and feeding preferences and antibiosis. A trial was also made to survey local biotypes o( the green rice leafhopper possible to show different reaction for the rice varieties. The varieties resistant to the green rice leafhopper were mostly IRRI sources such as Bir-tsan-3, MTU-15, DK-1, DV-139, H105, ASD-7, MGL-2, PTB-18, Muthumanikam, Vellanlangalayan, and the domestic commercial varieties were generally susceptible, but only the reaction of Tong-il and its lines were moderate. Ovipositional and feeding preferences were significantly different among the varieties, but no correlation was observed between the two preferences. The nature of varietal resistance to the insect seemed to be related with the feeding preference, not ovipositional preference. The green rice leafhoppers confined on the resistant varieties such as PTB-18, Muthumanikam, H105 etc. suffered higher nymphal mortality than the susceptible varieties such as T(N) 1 and Jinheung. Though the varieties Mudgo and Suweon 214 were moderately resistant and moderate in plant reaction, the insects confned on two varieties suffered relatively higher nymphal mortality. No local biotypes of green rice leafhoppers with respect to plant reaction were found.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.23 no.5
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• pp.73-86
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• 2020

In the modern era, the elementary schools in the Republic of Korea are advanced with the competitive world. Thus advancement in technology, and other factors in the elementary schools are releases some kind of particulate matter (PM), which causes deleterious effects on school students health, academic program, growth and development. The school students are susceptible to PM particularly, PM₁₀ and PM_2.5. Based on this hazardous effect of PM on school students we conducted the research on the elementary schools class rooms by introducing vertical gardening system to get the schools "ever green". The main aim of this study is to investigate the environmental factors in the educational effect program in the class rooms and indoor air quality changes. For the educational effect, the 4th operation program was applied to 2 schools for 2 hours once a month from September to December 2019. Each school conducted a survey on satisfaction, plant friendliness, and environmental sensibilities, targeting classes that participated in the green school program and those who did not. The environmental effects were monitored by installing indoor air quality facility in the program participating classes and the non-participating classes. From November 2019 to December 2019, three factors were measured: PM10, PM2.5, and humidity. The results were analyzed by T-test using the SPSS 24.0 software program. As a result of the analysis, student's overall satisfaction with the program and their intention to re-engage were high in terms of educational effect. It was also found to be effective in emotional, educational, social, and physical aspects. In particular, it was found that there was a statistically significant effect on improving plant friendliness in terms of plant friendliness and environmental sensitivity. In terms of environmental effects, it was found that there was a significant difference between the program-applied and non-programmed classes in PM10, PM2.5, and humidity. Through this study, it was confirmed that the plant education program using vertical gardens is effective in both the educational effect and the improvement of indoor air quality in the classroom. In conclusion, vertical gardening system in the elementary schools should implement for the beneficial of young generation development and back bone to the nation.

• Journal of the Korean Institute of Landscape Architecture
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• v.39 no.4
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• pp.11-17
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• 2011

This study focused on the regulations and support system of green rooftop landscaping between Korea and China. Our research found out regulations and support system to review the supplement point to understand the present state of green rooftop landscaping in the two countries. We aimed to provide basic legal information for the development of green rooftop landscaping regulations. Also, a management plan guide and after-evaluation guide were suggested. First, roof load safety is the foremost factor for the structure of green rooftop landscaping. It includes not only considering the weight of construction materials, but also accurately calculating weight of rain, snow and the rooftop's capacity for people when the rooftop is designed. Second, the appropriate waterproof and root material should be selected basing on climatic conditions. Third, a maintenance and management plan needs to be established to regularly check the plant, facilities, soil and to maintain them. Fourth, the criteria of quality inspection are waterproof and root resistant material, and the growth and development of plants. Waterproof and root resistant materials are a very important part of rooftop greening, so they must be strictly inspected after construction. Fifth, the support system of rooftop greening should be continuously improved. The choice of the object and the amount of support should be strictly stipulated so that the construction of rooftop is promoted when volunteers do rooftop greening.

• International Journal of Highway Engineering
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• v.13 no.4
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• pp.159-166
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• 2011

Green house gas emissions are increasing as development of the industrial economy of the international community. Many countries in the world are endeavoring to reduce green house gas emissions under severe climate change. In order to protect grobal warming, government is trying to reduce green gas emissions under "Low Carbon Green Growth Policy" and investing climiate-firendly industries such as renewable energy harvesting. Renewable energy has been rapidly developing as a result of investment for development technology of using natural energy such as solar, wind, tidal, etc. There are lots of waste energy in the road space. However, nobody is not interested in waste energy from the road space. This paper present a fundamentally experimental study of energy harvesting technique to use waste energy in the road. The waste energy in the road is covered a pressure and impact of vehicles on the road, the radiant heat from asphalt pavement, road noise and vibration etc. In this study, an energy harvesting device using piezoelectric element is proposed and various tests are conducted to investigate a characteristic of this device as function of impact loading based on piezoelectric effect behavior. This paper shows the energy harvesting results of the device using domestic piezoelectirc element as a function of impact load size and pavement types.

• Composites Research
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• v.29 no.4
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• pp.125-131
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• 2016

In case of CNT mixing with epoxy, epoxy matrix needs to be diluted. This work studied the effect of the dilution condition of epoxy on CNT dispersion. The optimum solvent condition using acetone and DMF was found via mechanical and solubility methods which affects, the epoxy performance. The dispersion using acetone was better than the DMF and thus higher mechanical properties. Four mixing types of CNT particle were performed. To verify the effects of each step between dilution and dispersion, the dispersion between epoxy and CNT was evaluated via the electrical resistance and optical methods. The optimum dispersion was obtained via mechanical test and thermal analysis by DSC. Among four types, the best was to disperse CNT after epoxy and hardeners were diluted respectively.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.880-894
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• 2010

The Grout injected precast pile is widely used in rapid-transit railway bridge recently. The existing portland cement of well used filling at injected precast method that with low strength and environmental pollution, unstable in which ground water contamination by cement flow out, ground relaxation by water down, decrease of horizontality resistance and durability and load transfer divide etc. In particular, as in rapid-transit railway bridge need to secure safety from different angle with vibration of high speed train, horizontal force when train stop and earthquake. Works of foundation construction consider to requirements of the times to coal yard green growth. Together, new green foundation method for possible economics and securing of reduce the term of works are material to developments. Therefore, we carried out study that it is using and development new concept environment - friendly filling include durability and earthquake resistance, for secure safety and minimize environment pollution. To achieve this, we carried out difference tests that new green fillings of underwater concrete, high liquidity, high viscosity, early stiffness as compared to existing portland cement fillings. As results, new green filling have outstanding application at precast pile method and micropile construction method with vertical bearing capacity, horizontal bearing capacity and many case. From now on we will be looking forward to development of new environment-friendly foundation method from various further studies.