SWAT model과 기후변화 자료를 이용한 산사태 예측 기법 제안과 평가: 지리산 국립공원 중산리 일대 사례연구

김지수,김민석,조용찬,오현주,이춘오,Kim, Jisu,Kim, Minseok,Cho, Youngchan,Oh, Hyunjoo,Lee, Choonoh 한국지하수토양환경학회 2021 지하수토양환경 Vol.26 No.6

The purpose of this study is prediction of landslide occurrence reflecting the subsurface flow characteristics within the soil layer in the future due to climate change in a large scale watershed. To do this, we considered the infinite slope stability theory to evaluate the landslide occurrence with predicted soil moisture content by SWAT model based on monitored data (rainfall-soil moisture-discharge). The correlation between the SWAT model and the monitoring data was performed using the coefficient of determination (R²) and the model's efficiency index (Nash and Sutcliffe model efficiency; NSE) and, an accuracy analysis of landslide prediction was performed using auROC (area under Receiver Operating Curve) analysis. In results comparing with the calculated discharge-soil moisture content by SWAT model vs. actual observation data, R² was 0.9 and NSE was 0.91 in discharge and, R² was 0.7 and NSE was 0.79 in soil moisture, respectively. As a result of performing infinite slope stability analysis in the area where landslides occurred in the past based on simulated data (SWAT analysis result of 0.7~0.8), AuROC showed 0.98, indicating that the suggested prediction method was resonable. Based on this, as a result of predicting the characteristics of landslide occurrence by 2050 using climate change scenario (RCP 8.5) data, it was calculated that four landslides could occur with a soil moisture content of more than 75% and rainfall over 250 mm/day during simulation. Although this study needs to be evaluated in various regions because of a case study, it was possible to determine the possibility of prediction through modeling of subsurface flow mechanism, one of the most important attributes in landslide occurrence.

SWAT 모델을 이용한 강우특성 변화에 의한 퇴적물-유출량 간의 관계 평가

김지수,김민석,조용찬,Kim, Jisu,Kim, Minseok,Cho, Youngchan 한국지하수토양환경학회 2021 지하수토양환경 Vol.26 No.6

The sediment transportation caused by soil erosion due to rainfall-discharge in the large watershed scale plays critical role in human society. The relationship between rainfall-discharge-sediment transportation is depending on the start time of rainfall and end of rainfall but, the studies related with rainfall characteristics are insufficient. In this study, The Soil and Water Assession Tool (SWAT) model was used to study the relationship between rainfall-discharge-sediment transportation at the Sook river watershed which is monitored by the Ministry of Environment. To do this, first of all, the sensitivity analysis about model attributes was performed using monitored data. The accuracy analysis of SWAT model was conducted using the model's efficiency index (Nash and Sutcliffe model efficiency; NSE) and the coefficient of determination (R²). After that, it was studied what results could be obtained according to changes in rainfall timing and end points. In the result of discharge simulation, the modified rainfall values (sum of total rainfall starting time and end time) showed more high accuracy values (R²:0.90, NSE: 0.8) than original rainfall values (R²:0.76, NSE: 0.72). In the result of sediment transportation simulation, during calibration had more resonable results(R²:0.87, NSE: 0.86) than compared with original rainfall values (R²:0.44, NSE: 0.41). However, validation results of sediment transportation simulation showed low accuracy values compared with calibration results. This results maybe cause monitoring periods of sediment flow compared with discharge monitoring periods. Nevertheless, since rainfall characteristic plays critical rule in model results, continuous research on rainfall characteristic is needed.

단열 페인트 첨가제로써 중공형 실리카 나노입자의 크기에 따른 효과

김지수,김영훈,Kim, Jisue,Kim, Younghun 한국청정기술학회 2022 청정기술 Vol.28 No.1

에너지 절약을 위한 연구 중 단열 기술 분야에서는 공기의 낮은 열전도도를 활용한 연구가 이뤄지고 있으며 널리 상용화 되고 있다. 본 연구에서는 입자 내부에 공기층을 갖는 중공형(hollow) 형태의 실리카 나노 입자를 제조하여 공기층 크기가 단열 성능에 미치는 영향에 대해 고찰하였다. Polystyrene 주형법을 이용하여 졸-겔공정을 통해 속이 빈 중공형 실리카 나노 입자(Hollow silica nanoparticles)를 제조하였고, 입자를 5 wt %로 도료에 첨가한 후 열전달 실험을 통해 단열 성능을 확인하였다. 기존 페인트에 입자를 혼합하여 약 15 %이상의 단열효율을 나타냈으며, 내부 공기층의 크기가 큰 입자가 작은 입자에 비해 5% 높은 단열 성능을 나타냈다. 이번 연구를 통해 내부 크기에 따른 단열효과의 차이를 보여줌으로써, 중공형 형태의 입자를 첨가제나 도료 제조에 사용하는 경우 단열효과를 높이기 위해 매질 내에서 입자가 공기층을 최대로 이룰 수 있도록 입자의 크기를 고려해야함을 제시한다.

패션 인스타그램 해시태그가 소비자 태도에 미치는 영향

김지수,정다은,조민주,나영주,Kim, Jisu,Jeong, Da Eun,Jo, Minjoo,Na, Youngjoo 한국섬유공학회 2018 한국섬유공학회지 Vol.55 No.2

Recently, the number of Instagram users is increasing and the marketing strategy of fashion brands to utilize hashtags (#) is rapidly growing. This study investigates the effects of hashtags in fashion-Instagram on consumer attitudes. The purpose of this study is to investigate the effect of the number, language, and relevance of the hashtags used in fashion-Instagram on the cognitive, emotional, and behavioral factors of consumer attitudes. The results of this study are as follows: First, a lesser number of hashtags has a positive effect on these factors. Second, when the language of the hashtag is English rather than Korean, it has a positive effect on the abovementioned factors. Third, when there is a relationship between the hashtag and the post, the consumers showed significantly more positive attitudes. Therefore, this study can help fashion brands to more effectively utilize hashtags in marketing using Instagram. In addition, this study will likely lead to the development of methods for utilizing hashtags as a more specific means of marketing through future studies.

한복과 한푸의 차이점 분석에 관한 연구

김지수,나영주,Kim, Jisu,Na, Youngjoo 대한가정학회 2022 Human Ecology Research(HER) Vol.60 No.2

(K)Hanbok, which is Korea's traditional clothing, differs from the Chinese Hanfu or Japanese Kimono. This study aims to understand the fundamental differences between (K)Hanbok and Hanfu. The Goryeo Dynasty (K)Hanbok, which was particularly popular in China, was established because the Ming Dynasty Hanfu and Chinese fashion were considerably influenced by the 'Koryo Yang'. Firstly, while (K)Hanbok is bulky, Hanfu of the Han Dynasty is characterized by forming a slim silhouette. Due to the climate of the Northern Hemisphere, (K)Hanbok shows a rich silhouette comprising multiple layers of inner pants and a pleated skirt over a voluminous underskirt. On the other hand, the Han's Hanfu creates a straight silhouette in the form of a wrap, revealing the contours of the body. The pleated skirt of the (K)Hanbok can use six to twelve width fabrics, depending on the social position; however, the Hanfu of the Han is a skirt without any pleats. Secondly, the clothing patterns, which have various shapes, are totally different in how they are made and sewn. The Korean (K)Hanbok is a two-piece separate, whereas the Chinese Hanfu style is a one-piece with a skirt. The short length of the (K)Hanbok jacket has a Sup which is cut and pasted allowing the front closure to overlap. Nevertheless, the Hanfu of the Han does not have this Sup because it is of a wrap-around, one-piece style and has an exceptionally large front, and wraps around at the waist which extends to the sides. Thirdly, the (K)Hanbok jacket has separate string Gorums for fastening, and an additional belt around the waist; however, in the case of Gorum, it is unnecessary for a wrapping style of Hanfu. Fourthly, Koreans as an agricultural horse-riding people, basically wore the trousers attached a comfortable gusset, while the Chinese Hanfu had no pants, but the Chinese wore Gaedanggo pants which exposed the hips, inevitably during the Warring States period.

LED 등기구에 사용되는 도광판 패턴에 따른 광특성 분석 연구

김지수(Jisu Kim),김해규(Haegyu Kim),김재연(Jaeyeon Kim),유소영(Soyoung You),강수빈(Subeen Kang),백운회(Woonhoi Baek),김진선(Jinsheon Kim) 한국조명·전기설비학회 2023 한국조명·전기설비학회 학술대회논문집 Vol.2023 No.11

고대 중국의 人法天 哲學思想

김지수(Kim, Jisu) 동아대학교 법학연구소 2012 東亞法學 Vol.- No.54

자연법론은 법실증주의와 대비되면서 서양 법철학사에서 오랫동안 중요한 학문전통으로 내려오고 있다. 동양 전통법문화에서는 ‘사람이 하늘을 법삼는’다는 人法天의 사상이 보편적이다. 전통철학에서 ‘하늘(天)’의 개념은 여러 의미를 내포하는데, 허공으로서 하늘뿐만 아니라, 自然, 하느님, 그리고 無爲의 道까지 뜻한다. 따라서 사람이 하늘을 법삼는다는 人法天 사상은 동양의 자연법론으로 이해할 수도 있다. 이러한 관점에서, 본고는 고대 중국, 특히 先秦시대의 주요 경전과 제자백가사상을 분석ㆍ검토하고자 한다. 주요 연구대상은 詩書易 三經 및 春秋左傳ㆍ禮記 등 주요 선진 經典과, 老子ㆍ莊子ㆍ關尹子를 포함하는 道家와, 공자와 맹자ㆍ순자를 포함하는 유가, 그리고 墨子와 管子ㆍ呂氏春秋 및 일부 법가 등이다. 이밖에 중국 전통왕조의 正史에서 이러한 철학사상을 입법 및 행정에서 주요한 일반지침으로 두드러지게 강조한 점도 살핀다. 필자는 본고가 앞으로 전통법의 역사철학 연구뿐만 아니라 동서양의 자연법론 내지 법철학사상의 비교연구에도 작지만 뜻 있는 보탬이 되길 희망한다. Natural law theory as contrasted with legal positivism has long been recognized as one major theme of scholarly discussion in the Western history of legal philosophy. In oriental traditional legal culture, it has been universal that the human models or shall model the Heaven or the Nature. The traditional concept of ‘Heaven(天)’ has various meanings, such as the sky, the nature, the God, and the truth(Tao: 道). Therefore, the thought that the human models the Heaven can be understood as the base of oriental natural law theory. In line with these viewpoints, this paper tries to analyze several classics and major schools of thought in ancient China, which cover the Five Classics including the Book of Songs(the Shi Ching: 詩經), the Book of History(the Shu Ching: 書經), the Book of Changes(the I Ching: 易經), Chunqiu Zuozhuan(春秋左傳) and Liji(禮記) ; Taoism including Laozi(老子), Zhuangzi(莊子) and Guanyunzi(關尹子); Confucianism including Confucius (孔子), Mencius(孟子) and Xunzi(荀子); Mozi(墨子), Guanzi(管子) and others. In the authorized histories of the Chinese dynasties, these philosophical flows have been emphatically utilized as the primary guide of general legislation as well as administration of justice. I hope that this paper become a small and meaningful profit to the study of the traditional legal history and philosophy as well as the comparative study between the Eastern and Western natural law theory or philosophy in future.

파트 기반 모델을 이용한 자동차 검출 시스템 개발

김지수(Jisu Kim),백정현(Jeonghyun Baek),현준혁(Junhyuk Hyun),김은태(Euntai Kim) 대한전기학회 2015 정보 및 제어 심포지엄 논문집 Vol.2015 No.4

과학 교사의 PCK 국내 연구 동향 분석

김지수(Jisu Kim),최애란(Aeran Choi),양정은(Jungeun Yang) 학습자중심교과교육학회 2023 학습자중심교과교육연구 Vol.23 No.4

목적 본 연구는 국내 학술 등재지에 게재된 과학교사의 PCK 관련 논문을 대상으로 연구 동향을 분석하여 과학교사의 PCK 관련 후속 연구와 현장교사 및 예비교사 교육에 의미있는 시사점을 제시하고자 한다. 방법 학술 검색 데이터베이스 RISS에서 ‘과학+PCK’, ‘과학+교과교육학지식’, ‘과학+교수내용학지식’의 키워드 조합으로 검색하여 최종 선정한 연구 대상은 1998년부터 2021년까지 40개의 학술지에 발표된 162편이며, 연구 주제와 주제별 연구 방법과 연구 결과를 귀납적으로 분석하였다. 결과 연구 주제로는 과학교사의 PCK 요소 및 상호작용을 분석한 연구가 61편으로 가장 많이 수행되었으며, 과학교사의 PCK 변화 탐색이 34편, 교사의 어려움, 요구도, 인식 등에 내재된 PCK 분석 28편, 과학교사의 PCK와 다른 변인의 관련성 및 효과 분석 23편, 문헌 연구 22편, 과학교사 전문성 의미에 대한 인식 탐색 연구 7편이 있었다. 두 가지 이상의 주제에 해당하는 경우 중복코딩하여 주제별 논문 편수의 합과 총편수가 일치하지 않는다. 결론 수업 실행 맥락에서 과학교사의 PCK 요소를 분석한 연구는 학생의 오개념 및 선개념에 대한 교사의 이해 증대와 평가에 대한 지식 함양을 위한 교사 전문성 개발프로그램의 필요성을 제기한다. 또한, 다양한 과학 교과와 주제에 관해 1년 이상 장기간 수업 관찰을 통한 교사의 PCK 발달을 탐색하는 후속 연구의 필요성이 제안된다. 예비과학교사의 수업 실행 경험이 예비과학교사의 PCK 발달에 필수적이고, 현장과학교사의 PCK 변화를 위해서는 멘토링, 코티칭, 수업컨설팅 등에서 수업 관찰이 필수적임이 시사된다. Objectives The purpose of this study was to analyze research studies published in Korea accredited journals and examine research trends in science teachers’ pck so that we provided implications on following up studies and preservice and inservice science teacher education. Methods The purpose of this study was to analyze research studies published in Korea accredited journals and examine research trends in science teachers’ pck so that we provided implications on following up studies and preservice and inservice science teacher education. Results There were 61 research studies that investigated science teachers’ pck components and interactions between components, 34 research studies examining changes in science teachers’ pck, 28 research studies examining pck embedded in teacher difficulties, requests, perceptions, etc. There were 23 research studies investigating relationships between pck and other variables or impacts of programs targeting pck development, 22 research studies for theoretical frameworks, and 7 research studies examining perceptions on science teacher professionalism. Conclusions Research studies examining science teachers’ pck in teaching context imply that professional development programs are needed for teacher knowledge of student understanding and teacher knowledge of assessment. Further studies are needed to investigate teacher pck development about various science subjects and topics for long periods more than one year. Research studies about impacts on preservice pck imply that teaching experiences are critical to preservice teachers’ pck development and observations of teachers’ teaching performance are critical to inservice teachers’ pck development through mentoring, coteaching, and instruction consulting.

스마트 폰 기반 영상처리 기법을 활용한 간편 부피계측 및 계량 어플리케이션

김지수(Jisu Kim),박근주(Geunjoo Park),안수빈(Subin An),현정원(Jungwon Hyun),박승수(Seungsoo Park),이중재(Joongjae Lee) 한국통신학회 2016 한국통신학회 학술대회논문집 Vol.2016 No.11