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.

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.

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.

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.

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.

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

中國 傳統社會의 家父長權

김지수(Kim, Jisu) 전남대학교 법학연구소 2007 법학논총 Vol.27 No.2

Max Weber characterized the pre-modern Chinese society as a Traditional Domination based on traditional patriarchal authority. In ancient China, the Empire was a magnified and extended version of a Family, and a family was a epitome of the Empire. So a patriarch, the head of a family, had the strong authority similar an Emperor in his family. In general, the patriarchal authority in ancient Chinese families may be analogized to Patria Potestas in ancient Rome. This paper attempts to make a general survey of Patria Potestas in Chinese Traditional Society. First, it sets forth a definition of Chinese Traditional Patria Potestas, and probes its original meaning from the viewpoint of etymology. Interestingly, Chinese character of ‘父[Fu]’ meaning ‘father’ was originated from the combination of characters ‘right hand’ and ‘stick’ symbolizing strength and authority, similar to the ancient Roman term ‘manus’, meaning a hand, which was the beginning of Patria Potestas. In addition, Chinese character of ‘尹[Yin]’, meaning ‘to govern’ or ‘to rule’ was also originated from the same characters ‘right hand’ and ‘stick’, and Chinese character of ‘君[Jün]’ meaning ‘King’ or ‘monarch’ was originated from the combination of ‘尹[Yin]’[‘right hand’ and ‘stick’] and ‘口[Kou]’ meaning ‘mouth’ or ‘word of command’. These three Chinese characters relating to the patriarchy of strength and authority all have the same origin in etymology. Second, this paper explores the attributes of Chinese Traditional Patria Potestas using the concept of ancient Roman ‘Patria Potestas’. It discusses the unity, exclusiveness, one-sidedness, and absoluteness of Chinese Traditional Patria Potestas. Third, it searches for the contents of Chinese Traditional Patria Potestas. Such contents contain the power of command and leadership, the power of punishment, the power of killing, the power of selling, the power of deciding marriage of his family member, and the right of offering worship and sacrifices to the ancestors. Finally, this paper discusses some concepts relative to Chinese Traditional Patria Potestas : the authority of the head of a household who is not the father of family; the authority of a ‘Zong-zi[宗子]’, the eldest son born of lawful wife; the authority of a clan elder called ‘Zu-zhang[族長]’; and the authority of a mother. In conclusion, the ancient Chinese society had ensured patriarches de jure and de facto authority, and demanded patriarches of complete loyalty to royalty in turn.

지방정부 정책의 진화적 합리성에 관한 연구 - 서울역 고가 공원화 사업을 중심으로 -

김지수(Jisu Kim),김기형(Kihyung Kim) 한국지방행정학회 2016 한국지방행정학보 (KLAR) Vol.13 No.3

This case study on the Seoul Station 7017 project, by seeing it through the lens of evolutionary rationality, explores rationality of policy that the (local) government and the related stakeholders should seek for in a complicated, uncertain, and dynamic situation. This research suggested evolutionary rationality as an alternative to substantial rationality and procedural rationality, which consist of the two basic dimensions of policy rationality. The study contrasted between the classical policy rationality dimensions and evolutionary rationality of the case. The mayor’s political consideration expedited the planning of the project that had failed to confirm substantial rationality in the beginning due to conflicting interests in terms of its values and potential effects. Such a politics-led fast process lacking substantial rationality had also not gained its procedural rationality. Nevertheless, the later participatory process (discussion and deliberation) that stakeholders involved successfully fulfilled evolutionary rationality in soothing conflicts and contributed to improving substantial rationality to some extent. This study suggests how local governments can secure the rationality of policy in the introduction of policies that are expected to conflict with existing social and economic values.

20대 소비자의 애국심에 따른 일본브랜드 구매 특성

김지수 ( Jisu Kim ),서우영 ( Wooyoung Seo ),나영주 ( Youngjoo Na ) 한국감성과학회 2021 감성과학 Vol.24 No.1

본 연구는 20대 소비자의 애국심 정도에 따른 일본 브랜드 구매 행동을 규명하고자 한다. 연구방법은 20대 성인대학생 235명을 대상으로 설문 조사를 통한 연구를 진행하였고, 설문내용은 20대 소비자의 겉옷과 속옷에 대한 기본적인 구매 태도를 질문한 뒤 대표적인 일본 브랜드 U브랜드의 겉옷과 속옷에 대한 구매 태도를 조사하였다. 그리고 애국심과 U브랜드 구매의 상관관계를 알아보기 위하여 애국심에 관한 질문을 하였고 마지막으로는 기본적인 인적사항을 조사하였다. 연구 결과는 첫째, 겉옷과 속옷에 대한 소비자의 구매 태도에 유의한 차가 있었다. 20대 소비자들은 겉옷을 구매할 때에는 디자인을 가장 중요시 여기고 속옷을 구매 할 때에는 기능성을 가장 중요한 요인으로 선택하였다. 둘째, U브랜드의 겉옷과 속옷에 대한 소비자들의 태도가 다른 점이 확인되었다. U브랜드의 겉옷 디자인에 대한 평가는 다소 긍정적이진 않으나 가격에 만족하는 경향을 보였고 U브랜드의 속옷제품의 기능성에 대한 점수는 다소 긍정적인 응답을 얻었다. 셋째, 애국심 평균을 기준으로 고저집단으로 나누어 t-test 분석한 결과, U브랜드의 의류 제품에 대한 태도와 구매 특성에 유의미한 차이를 보였다. 고애국심 소비자가 저애국심 소비자보다 U브랜드 겉옷 제품에 대해 가격과 상품성 등을 부정적으로 생각하였는데, 디자인의 평가에서만 유의한 차이가 없었다. 속옷제품에서는 저애국심 소비자는 고애국심 소비자보다 U브랜드 제품의 가격, 디자인, 기능성 등에 대해 긍정적으로 생각하고 있었다. This study investigates the buying behavior pertaining to Japanese brands according to the degree of patriotism of consumers in their 20s. A survey of 235 university students was conducted; the survey questioned the basic purchasing attitudes of consumers in their 20s regarding outerwear and underwear and then surveyed the purchasing attitudes regarding U brand’s (representative Japanese brand) outerwear and underwear. To detect the correlation between patriotism and U brand purchases, this study asked questions about patriotism and investigated basic personal information. The research results were as follows. First, there was a significant difference in consumer’s purchasing attitude toward outerwear and underwear. When of consumers who are in their 20s purchase outerwear, its design was the most important factor, whereas when purchasing underwear, functionality was the most crucial factor. Second, it was confirmed that consumer’s attitudes toward U brand’s outerwear and underwear differed. Although the evaluation of U brand’s outerwear design was not positive, the consumer tended to be satisfied with the price. U brand’s score concerning the functionality of underwear products received a slightly positive response. Third, a total of 235 respondents were divided into a high- and low-patriotism-group based on questions about patriotism. There were significant differences in their attitudes toward clothing and consumer’s purchasing behavior at U brand. Highly patriotic consumers thought negatively about U brand outerwear products in terms of price and product quality than low patriotic consumers; however, there was no significant difference only regarding design evaluation. For underwear products, low patriotic consumers were more positive about the price, design, and functionality of U brand products than high patriotic consumers.

불법주정차 단속원 안전을 위한 인공지능 AR 글래스 활용 서비스 디자인 제안

김지수(Jisu Kim),김연균(Yeonkyun Kim),박예진(Yeajin Park),이승희(Seunghee Lee),오인균(In-Kyun Oh) 한국디자인학회 2023 한국디자인학회 학술발표대회 논문집 Vol.2023 No.5