서울시 주요 공원, 유적지 및 공공기관시설 내 연못 및 호수면적 변화에 따른 LST(Land Surface Temperature) 분포 경향 - 다중시기의 Landsat TM/ETM 위성영상을 이용하여

길승호 한국생태환경건축학회 2017 한국생태환경건축학회 논문집 Vol.17 No.6

Purpose: This study was to verify LST (Land Surface Temperature) distribution according to increasing a water-area in various ponds and lakes in Seoul. The LST was retrieved through using multi-temporal Landsat TM/ETM with previous studies. The various ponds and lakes was in parks and public organizations of Seoul. Method: The data of ponds and lakes was used through Seoul Biotope Map (2000, 2005 and 2010) recreated every five-years. The LST in each pond and lake was extracted from retrieved LST. Result: As the water area was increased, the LST was gradually lowered to L-shaped model. The Han River was the lowest LST as around 2 1℃. The water-area LSTs of below 20,000㎡ distributed a large range. Thirty-seven water-areas in twenty-five sites were selected in major parks and public organizations. The LST of a large water-area is less influenced from the temperature of surrounding environment while the LST of a small water-area has a wide deviation because the small water-area is more exposed from it. Therefore effective strategies should be made to mitigate LST around a small water-area as well as increasing a large water-area is important.

소나무, 주목, 느티나무 그리고 단풍나무의 입면 NDVI 비교 분석 - 강원대학교 내 조경수목식재종을 대상으로 -

길승호 한국환경복원기술학회 2017 한국환경복원기술학회지 Vol.20 No.6

This study was conducted by using a Nikon Coolpix S800c camera equipped with a NIR filter to measure the NDVI(Normalized Difference Vegetation Index). It was used for the measurement of the three trees of Pinus densiflora, Taxus cuspidata, Zelkova serrata and Acer palmatum in Kangwon National University. The NDVI value of the surface of the building was compared and analyzed. The average value of NDVI in August and September was high in all species. The NDVI distribution of Taxus cuspidata was higher than the other trees. The NDVI distribution of Pinus densiflora and Taxus cuspidata did not show any significant seasonal differences, but The NDVI distribution of Zelkova serrata and Acer palmatum were relatively low in May and June, which are leafless periods. Previous studies related to NDVI value were generally analyzed using satellite imagery. However, it was scarce related to study the NDVI value of each tree or study the changing process of NDVI by time series. Previous studies have used NDVI values on the ground but this study used NDVI values in the ground section. Future studies will be necessary to measure the NDVI value at different times for various species and also to make efforts to generalize the measurement method. In addition, research related to various fields such as the relationship between NDVI and carbon stocks and the relationship with LAI needs to be conducted.

The Analysis of Research Trends and Public Awareness of Smart Farms using Text Mining

길승호,박혜미,이은석,김진영,김지우 인간식물환경학회 2023 인간식물환경학회지 Vol.26 No.1

Background and objective: To deal with recent issues such as climate change, rural aging, food security, and the Fourth Industrial Revolution, there is a growing interest in smart farms that can efficiently produce food with ICT. In response to the international issues, this study analyzed articles on smart farms published in international journals and KCI journals as well as Instagram hashtags through text mining and identified relevant research trends and public awareness. Methods: This study collected total 584 articles on smart farms from 2010 to 2021 and hashtags in Instagram posts uploaded in 2021. To improve the reliability of the analysis results, nouns were exclusively extracted from the abstracts and hashtags, and data preprocessing was performed by removing nouns that appear customarily and combining synonyms. After that, we analyzed frequency, degree centrality, betweenness centrality, and topic modeling. Results: The analysis results of words with high frequency and centrality by research data are as follows. KCI and international journal articles had a tendency to mainly focus on ICT system development for efficient operation of smart farms. However, KCI articles considered relevant policies to establish the technologies. On the other hand, international journal articles tended to conduct research on smart farms in a wider area of agricultural fields than KCI articles. The main topics on Instagram were diet food, rural migration, and urban agriculture. This result shows that healthy food, experiences, and education through smart farms are gaining public interest. Conclusion: Currently, there is insufficient analysis of research trends in smart farms. In this vein, this study has significance as it included academic trends and public awareness by considering both research articles and Instagram posts. We expect the results of this study to be used as useful data for decision making to set the research and policy directions required toadvance smart farms in the future.

영양 서석지원(瑞石池園)의 경관요소를 통한 외원 규모 추정 및 프랙탈 구조(Fractal Structure)

길승호,양병이,Kil, Sung-Ho,Yang, Byoung-E 한국조경학회 2013 韓國造景學會誌 Vol.41 No.5

The studies of Korean traditional gardens have been a lot of diachronic approaches through ancient documents and on-site investigation. Previous research has focused on the characteristics that are inherent symbolism of the traditional landscape space, such as site characteristics. There are many studies for inner gardens, outer gardens and other influential ranges of gardens of the location characteristics. However, studies on the scale of external gardens were not satisfactory from a quantitative perspective. Unlike private life sphere, quantitative analysis was conducted on the role of a sphere of public community life for outer gardens. Visibility analysis was performed through the existing literature and GIS programs to estimate the magnitude of the outer garden. When it was compared with Min G. H.(1982) research, it is almost the same if it is estimated to focus on Buyoung -bong(芙蓉峯) and Ip-am(立巖). Also, as a result of the fractal structure for a variety of symbols in the garden, fractal dimension in landscape elements is relatively concentrated, unlike in other areas. Thus, the external scale can be a means of cultural property protection out of the crucial perspective for the inner garden. There has been consideration of the cooperation with the visual complexity using the concept of fractal structure as one of the elements of landscape analysis. 지금까지 별서정원과 관련된 연구들은 고문서 및 현장조사를 통한 통시적인 접근을 많이 해왔다. 전통조경공간의 상징성, 입지 특성 등 그 공간에 내재된 특성에 초점을 둔 연구들이 많았다. 하지만, 입지 특성 중 내원, 외원, 영향권에 대한 특성은 많았으나, 외원 규모에 대한 정량적 연구는 미진하였다. 사생활권역인 내원과 달리 공동생활권역으로서의 역할인 외원에 대하여 정량적인 분석을 하기 위해 서석지원를 대상으로 실시하였다. 서석지원를 대상으로 기존 문헌들과 GIS 프로그램을 통해 가시권 분석을 실시하였으며, 외원 규모를 추정하였다. 선행연구와 일부 차이가 있었지만, 부용봉과 입암 중심으로 확인해본 결과, 거의 유사한 면적으로 나타났다. 또한, 추정된 외원 규모를 통해 서석지원의 다양한 상징성에 대한 프랙탈 차원을 분석해본 결과, 주요 경관요소에서 프랙탈 차원이 상대적으로 집중화되는 경향을 알 수 있었다. 특히, 주요 경관요소는 청기천을 제외하고, 일반 자연경관(논, 밭 등)에 비해 상대적으로 높은 수치 및 넓은 범위의 프랙탈 차원을 가지고 있었다. 이를 통해 외원규모가 그동안 별서정원의 형태 중 내원에 대한 문화재 보호에서 벗어나, 외원에 대한 문화재 보호수단을 위한 기초자료로 활용될 수 있을 것으로 기대한다. 또한, 이번 연구가 경관분석 요소 중 하나로서 프랙탈 구조 개념을 도입하여 주요 경관요소에 대한 시각적 복잡성에 대해 고려하였지만, 각 경관요소에 대하여 시문학과 더불어 좀 더 융합적인 사고의 결과물에 대한 연구가 필요할 것으로 기대한다.

상호또래교수과정에서 나타나는 중학교 3학년 학생들의 공변 추론

길승호,신재홍 한국학교수학회 2020 韓國學校數學會論文集 Vol.23 No.3

In this study, we conducted eight classes of reciprocal peer tutoring where each student took either role of a turor or a tutee in order to study about covariational reasoning in ninth graders. Students were given the opportunity to teach their peers with their own covariational reasoning as a tutor, and at the same time to learn covariational reasoning as a tutee. A heterogeneous group was formed so that scaffolding could be provided in the teaching and learning process. By presenting four questions of quantitative graph type and four questions of qualitative graph to the group, a total of eight reciprocal peer tutoring worksheets were collcted. The results of analysis are as follows. In the course of during reciprocal peer tutoring, students who experienced a higher level of covariational reasoning than their covariational reasoning level showed an improvement in covariational reasoning levels. In addition to it, students enhanced the completeness of reasoning by modifying or supplementing their own covariational reasoning. Minimal teacher intervention or high-level peer mediation seem to be needed for providing feedback on problem-solving results.

토양경도에 따른 비탈면 식생 특성에 관한 연구

길승호,이동근,안동만,구미현,김태연 한국환경복원기술학회 2012 한국환경복원기술학회지 Vol.15 No.5

This study was conducted on the measurement of soil hardness through a hardness testing machine in slopes of natural environments and artificial environments which is generally known as slope revegetation. The soil hardness as one of physicochemical soil properties is significantly associated with plant growth. Although another studies related to the slope revegetation was focused on herbaceous plants, studies related to soil properties for arbor appearance is lack. It was focused on the correlation analysis between the soil hardness and the plant appearance. the results were as follows:The higher the soil hardness is, the less the appearance of plants is as a result of survey. Species appearing in the high levels of the soil hardness represented mugwort and grass. The levels of the soil hardness in the slope of natural environments was good environmental conditions with various plants in the range of 6 to 12mm. The levels of the soil hardness in the slope revegetation was in the 6.88-30mm range. The soil hardness below 21mm showed a variety of plants with arbors and herbaceous plants, whereas it above 21mm represented a monotonous style of plant structure including Artemisia princeps, Lolium perenne, Poa pratensis L and Setaria viridis. The result of the correlation analysis between the soil hardness and the plant appearance was negatively correlated with justifiable significance levels. The result of a logistic regression analysis for tree appearance was statistically proved when the numerical value of the soil hardness is lower.

Characteristic Analysis using the Landscape Preference in the Urban Historic Temple

길승호 인간식물환경학회 2017 인간식물환경학회지 Vol.20 No.5

The traditional temple in the urban landscape is a place of historical and cultural heritage with ethnic values within the city. However, when viewed in a landscape perspective, several problems are implied. This is because the temple is restricted within the territories of the temple when there is a great need for space for gatherers and tourists. Thus, a dissimilar landscape planning and management system from the current traditional temple is required. In this study, the landscape of the traditional temple in the city viewed from Bongeunsa temple grounds was set as the study area and the representative viewpoints within the temple grounds were used as a base of describing the landscape's image and the factors of the landscape preference was also derived. These factors were then used as a base to create the landscape preference map for the region of Bongeunsa temple to present a visual representative of the place. The factors showed a significant impact on the landscape of Bongeunsa temple were selected to aesthetics, amiability and complexity. The higher the preference of these factors was, the higher the preference was for the landscape as well. The factors representing the landscape image and the landscape map according to the landscape preference of the temple were created to allow regions that showed both low and high levels in the landscape image and preference within the grounds to be visually classified and regions that needed improvements were also displayed. Furthermore, it also allowed elements to be extracted from it. The results of this study was an attempt in creating the landscape map formed based on the landscape of the temple grounds.

Development of Stability Evaluation Indicators on Revegetated Cut-slopes of Mountainous Terrain of Korea

길승호 서울대학교 환경대학원 2014 環境論叢 Vol.53 No.-

Inhibition of BETA2/NeuroD by ld2

길승호,전용진,HaeyoungSuh-Kim 생화학분자생물학회 2002 Experimental and molecular medicine Vol.34 No.5

Inhibitors of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase, known as statins, are widely used for primary and secondary prevention atherosclerosis is multistep processes where trans-endothelial migration of various leukocytes includ-ing monocytes is a crucial step. Interferon-γ (IFN-γ) contributes in this process by activating macro-phages and T-lymphocytes, and by inducing adhe-sion molecules in vascular endothelial and smooth muscle cells. In this study we investigated the expresion of intercellular cell adhesion mole-cule-1 (ICAM-1) in transformed endothelial cell line ECV304 cells as influenced by lovastatin, tumor necrosis factor-α (TNF-α) and IFN-γ. Results show that lovastatin suppresses expression of ICAM-1 by inhibiting the IFN-γ-induced extracellular signal- regulated kinase (ERK) p44/p42-STAT1 signaling pathway. In cells treated with lovastatin and IFN-γ, ICAM-1 was expressed at a lower level than in cells treated with IFN-γ alone. However, lovastatin does not reduce TNF-α induced expression of ICAM-1. A similar result was observed in cells N-γ. Cis-acting DNA sequence elements were identified in the 5'-flanking region of the ICAM-1 promoter that mediate inhibition by lovastatin; these se-quences map to the IFN-γ activated site which also binds the STAT1 homodimer. However, lovastatin did not inhibit IFN-γ-mediated induction of the Y701 phosphorylated form of STAT1. But lovasta-tin does inhibit the IFN-γ-mediated phosphoryla-tion of ERK1/ERK2 (T202/Y204) and S727 phos-phorylation of STAT1. TNF-αphosphorylation of ERK1/ERK2 and S727 in ECV304 and smooth muscle cels. The results provide the evidences that statins may have beneficial effects by inhibiting IFN-γ action in atherosclerotic pro-cess

Understanding the LST (Land Surface Temperature) Effects of Urban-forests in Seoul, Korea

길승호,윤영조 강원대학교 산림과학연구소 2018 Journal of Forest Science Vol.34 No.3

Urban development and population have augmented the increase of impervious land-cover. This phenomenon has amplified the effects of climate change and increasing urban island effects due to increases in urban temperatures. Seoul, South Korea is one of the largest metropolitan cities in the world. While land uses in Seoul vary, land cover patterns have not changed much (under 2%) in the past 10 years, making the city a prime target for studying the effects of land cover types on the urban temperature. This research seeks to generalize the urban temperature of Seoul through a series of statistical tests using multi-temporal remote sensing data focusing on multiple scales and typologies of green space to determine its overall effectiveness in reducing the urban heat. The distribution of LST values was reduced as the size of urban forests increased. It means that changing temperature of largescale green-spaces is less influenced because the broad distribution could be resulted in various external variables such as slope aspect, topographic height and density of planting areas, while small-scale urban forests are more affected from that. The largescalegreen spaces contributed significantly to lowering urban temperature by showing a similar mean LST value. Both of concentration and dispersal of urban forests affected the reduction of urban temperature. Therefore, the findings of this research support that creating urban forests in an urban region could reduce urban temperature regardless of the scale.