• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.400-400
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• 2015

기후변화로 인해 예측하기 어려운 강우패턴의 변화와 도시화로 인한 불투수면의 증가로 도심지는 매년 침수위험에 노출되어 있다. 배수시설의 개선은 인구밀도가 높고 유동인구가 많은 도심지에서 이루어지기 쉽지 않은 상황이며, 강우패턴의 변화는 예측과 대처가 어려운 상황이다. 이러한 이유로, 침투증진을 통해 직접유출수를 줄이는 연구 중 LID(Low Impact Development)에 대한 관심이 높아지고 있다. LID기법은 도시화로 증가된 불투수면을 투수면으로 대체하여 저류, 침투, 여과, 증발산을 유도하여 물 순환 회복에 기여할 수 있는 방법으로 옥상녹화, 투수성포장, 침투 트렌치 등의 기술요소가 있다. LID 기술요소에 대해 국외의 경우 설치방안과 평균적인 저감효과를 메뉴얼로 제시하고 있지만, 강우 및 토지의 지역적 편차가 큰 국내에 적용하기에는 어려운 상황이다. 또한, LID 모델링의 경우 유역 내 적용 면적에 따른 유출저감효과를 제시하는 연구결과는 다수 제시되고 있지만, 적용 면적과 지점에 따라 효율성을 제시하는 점에서는 다소 미흡한 상황이다. 따라서 LID 기술요소 별 설계 사례와 GIS를 바탕으로 유역 내 적용 지점과 면적을 산출하고, 적용 지점 및 면적에 따른 저감 효율을 분석하는 것이 필요하다. 본 연구는 SWMM모형을 이용하여 LID 기술요소 중 옥상녹화를 적용하여, 강우 강도와 적용지점 및 면적에 따른 유출저감 효율을 분석하고자 한다. 연구지역은 청계천 유역으로 총 면적의 75% 이상이 주거지, 상업지, 교통시설 등을 포함한 불투수면으로 이루어져있는 도시 지역이다. 강우자료는 10년, 30년, 80년 빈도 확률강우량을 적용하였으며, 옥상녹화를 적용하기 위한 지점과 면적은 GIS를 기반으로 산정하였다.

• Journal of Industrial Convergence
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• v.17 no.1
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• pp.17-24
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• 2019

The purpose of this study is to confirm the effects of the contents of the recording lectures through the automatic recording system of the nursing students on the program outcomes of the pediatric nursing. The study was designed using a nonequivalent control group pretest-posttest design. the subject of this study consisted of 104 nursing students(the experimental group of 52 and the control group of 52). Data were analyzed by ${\chi}^2$ test and independent t-test using SPSS 22.0. The effect of the first program outcome(PO1. We can integrate nursing skills based on various the liberal arts and the major knowledge into practice) of the experimental group was not confirmed, but the fifth program outcome(PO5. We can apply critical thinking based nursing processes and implement clinical inferences) was significantly higher than that of the control group. It is significant that this study presented the data to develop the class design method to improve the program outcomes of the nursing student at the present time which is operating the program outcomes based curriculum for nurse with core competency.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2009.03a
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• pp.23-26
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• 2009

• Journal of Korean Society of Forest Science
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• v.48 no.1
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• pp.1-24
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• 1980

One of the most important basic problems for developing the new techniques in the field of road landscape planting practices in Korea, is to clarify, analyse, and evaluate the existing technical level through actual field survey on the various kinds of planting techniques. This study is, therefore, aimed at the good grasp of detail essences of the existing level of road landscape planting techniques through field investigations of the executed sites. In this study, emphasized efforts are made to the detail analysis and systematic rearrangements of such main subjects as; 1) principles and functions of the road landscape planting techniques; 2) essential elements in planning of it; 3) advanced practices in execution of planting of it; 4) and improved methods in maintenance of plants and lands as an entire system of road landscape planting techniques. The road landscape planting techniques could be explained as the planting and landscaping practices to improve the road function through introduction of plants (green-environment) on and around the roads. The importances of these techniques have been recognized by the landscape architects and road engineers, and they also emphasize not on]y the establishment of road landscape features but also conservation of human's life environment by planting of suitable trees, shrubs, and other vegetations around the roads. It is essentially required to improve the present p]anting practices for establishment of the beautiful road landscape features, specially in planning, design, execution, establishment, and maintenance of plantings of the environmental conservation belts, roadside trees, footpathes, median strips, traffic islands, interchanges, rest areas, and including the adjoining route roads.

• Korean Journal of Remote Sensing
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• v.39 no.5_1
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• pp.481-493
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• 2023

In high-density urban areas, the urban heat island effect increases urban temperatures, leading to negative impacts such as worsened air pollution, increased cooling energy consumption, and increased greenhouse gas emissions. In urban environments where it is difficult to secure additional green spaces, rooftop greening is an efficient greenhouse gas reduction strategy. In this study, we not only analyzed the current status of the urban heat island effect but also utilized high-resolution satellite data and spatial information to estimate the available rooftop greening area within the study area. We evaluated the mitigation effect of the urban heat island phenomenon and carbon sequestration capacity through temperature predictions resulting from rooftop greening. To achieve this, we utilized WorldView-2 satellite data to classify land cover in the urban heat island areas of Busan city. We developed a prediction model for temperature changes before and after rooftop greening using machine learning techniques. To assess the degree of urban heat island mitigation due to changes in rooftop greening areas, we constructed a temperature change prediction model with temperature as the dependent variable using the random forest technique. In this process, we built a multiple regression model to derive high-resolution land surface temperatures for training data using Google Earth Engine, combining Landsat-8 and Sentinel-2 satellite data. Additionally, we evaluated carbon sequestration based on rooftop greening areas using a carbon absorption capacity per plant. The results of this study suggest that the developed satellite-based urban heat island assessment and temperature change prediction technology using Random Forest models can be applied to urban heat island-vulnerable areas with potential for expansion.

• Journal of the Korean Wood Science and Technology
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• v.36 no.1
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• pp.79-87
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• 2008

Many researchers have studied on rooftop greening that can be installed in abandoned spaces on a building roof. The most important issue in rooftop greening is the soil weight problem. The light greening materials are needed to solve this problem. Therefore, many alternative materials against the soil were investigated for rooftop greening. In this study, the waste wood chips and the waste paper slurry were evaluated as the lightweight vegetation foundation for rooftop greening. It also has a meaning for recycling of waste materials. The mixture ratio of waste wood chips to waste paper slurry for the board (the foundation of greening) was 60 to 40. The wet strength resin and the sizing agent were additionally added with different amount. After the forming of the board, physical and chemical properties were tested with the variation of wet strength resin and sizing agent. As the result of the test, the board with 15% of wet strength resin in the wet condition showed the highest strength. Futhermore, the moisture evaporation loss from the board surface with sizing agent was much lower than that from the board without sizing agent. Therefore, it was clear that the sizing agent was effective for water retention. The change of thickness in the wet condition was less than 1 mm, and it showed that the board is the predominant material on the dimensional stability. The average pH value of the board was ranged from 7.6 to 8.25.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.9
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• pp.1760-1766
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• 2009

Digital broadcasting and digital CATV and IPTV will continue in the competition, regardless of how the content of the program was broadcast over the Internet distribution and the damage of piracy is also growing. Excellent quality of the content of the digital CATV sales of DVD and high-density storage media because there is no difference in content and quality is the problem of illegal distribution. However, users can record and reuse program in the position of the guaranteed rights, and the purpose of training in fair and illegal recording and distribution needs to be separate from it. In this paper using a digital certificate recorded by the user and the process to ensure the purpose of illegal distribution of pharmaceutical distribution system design and implementation of the program was broadcast.

• Current Research on Agriculture and Life Sciences
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• v.31 no.4
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• pp.256-264
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• 2013

This study presents a greening plan for the under space of elevated rail tracks to reducing landscape impairment and improve the streetscape. This study focuses on a section of the Daegu Metro line number 3 that includes a concentration of high-rise apartments and commercial areas. First, different types of planting were categorized for the under space of the elevated rail track, and then images of each planting type were created using a 3D simulation tool to evaluate the visual characteristics. The landscape images and related adjectives were assessed using a survey. As a result, rows of flower trees received the highest evaluation, and 'harmony' was identified as the most important factor affecting the railscape preference. These results can be important data for establishing an efficient greening plan for the under space of elevated rail tracks.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2014.10a
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• pp.63-64
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• 2014

• Journal of Korean Society of Forest Science
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• v.106 no.4
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• pp.371-379
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• 2017

This study was aimed to investigate the contribution of tree plantation, tree breeding and soil erosion control techniques developed during Saemaul Undong periods to the successful forest rehabilitation in the Republic of Korea. We surveyed a various literature of forest journals and had deep interview with forest experts who were actively involved in the forest rehabilitation projects. In the Republic of Korea, the forest rehabilitation was started with Saemaul Undong in 1970s and carried out to make the country green and to restore degraded forest lands by supports of tree plantation, tree breeding and soil erosion control techniques. Various techniques such as seed storage, seedling production, mass vegetative propagation (grafting and cutting) and special planting at denuded land or slash and burn site were developed for tree plantation. All techniques developed for the forest rehabilitation were connected with Saemaul Undong which caused active participation of local community people. Therefore, the development of tree plantation, tree breeding and soil erosion control skills had great impact on the job creation and income sources of local dwellers. It would be an applicable case to developing countries suffering with deforestation and forest degradation if the Korean skills developed for forest rehabilitation could be transferred.