지반특성을 고려한 토사재해 예측 기법별 위험지 분석

최원일(Wonil Choi),최은화(Eunhwa Choi),백승철(Seungcheol Baek) 한국지반환경공학회 2017 한국지반환경공학회논문집 Vol.18 No.12

본 연구에서는 도심지 토사재해 예비중점관리 대상지역 중 총 6개 연구지역(춘천, 성남, 세종, 대전, 미량, 부산)을 선정하여 토사재해 위험지 예측 분석을 실시하였다. 분석에 사용된 모델은 현재 토사재해 위험지 예측에 보편적으로 사용되고 있는 기존 모델(SINMAP, TRIGRS)과 본 연구를 통해 개발된 프로그램(LSMAP)을 활용하였으며, 결과 비교분석을 통해 개발모델의 적용성을 검토하였다. 토사재해 위험지 예측에 사용되는 매개변수는 크게 지형특성, 토질특성, 임상특성, 강우특성으로 분류하였으며, 각 모델에 따른 토사재해 위험지 예측 분석 결과 LSMAP 및 TRIGRS에 비해 SINMAP을 이용한 분석은 대체로 위험지를 광범위하게 예측하였다. 이러한 결과는 모델별 적용되는 분석 매개변수의 차이에 의한 것으로 판단된다. 또한 임상특성을 고려한 LSMAP은 TRIGRS 결과와 비교하였을 때 예측 위험지 기준 -0.04~2.72%의 범위 내로 유사한 경향을 보이는 것으로 분석되었다. 이는 산지에 분포하는 임상 정보가 비탈면 안정에 다양한 영향을 미치는 것이라 할 수 있으며, 토사재해 위험지 예측에 중요한 매개변수임을 알 수 있다. In this study, a predictive analysis was conducted on sediment disaster hazard area by selecting six research areas (Chuncheon, Seongnam, Sejong, Daejeon, Miryang and Busan) among the urban sediment disaster preliminary focus management area. The models that were used in the analysis were the existing models (SINMAP and TRIGRS) that are commonly used in predicting sediment disasters as well as the program developed through this study (LSMAP). A comparative analysis was carried out on the results as a means to review the applicability of the developed model. The parameters used in the predictions of sediment disaster hazard area were largely classified into topographic, soil, forest physiognomy and rainfall characteristics. A predictive analysis was carried out using each of the models, and it was found that the analysis using SINMAP, compared to LSMAP and TRIGRS, resulted in a prediction of a wider hazard zone. These results are considered to be due to the difference in analysis parameters applied to each model. In addition, a comparison between LSMAP, where the forest physiognomy characteristics were taken into account, and TRIGRS showed that similar tendencies were observed within a range of -0.04~2.72% for the predicted hazard area. This suggests that the forest physiognomy characteristics of mountain areas have diverse impacts on the stability of slopes, and serve as an important parameter in predicting sediment disaster hazard area.

하드웨어 성능 카운터를 이용한 임베디드 멀티프로세서 환경에서의 에너지 모델링과 예측 기법

최원일(Wonil Choi),김현희(Hyunhee Kim),김지홍(jihong Kim) 한국정보과학회 2008 한국정보과학회 학술발표논문집 Vol.35 No.2

멀티채널 MPPT 태양광 시스템의 설계

최원일(Choi Wonil),민준기(Min Joonki) 전력전자학회 2022 전력전자학술대회 논문집 Vol.2013 No.11

지반특성에 따른 토사재해 해석 모델 비교

최원일(Wonil Choi),백승철(Seungcheol Baek) 한국지반환경공학회 2017 한국지반환경공학회논문집 Vol.18 No.6

본 연구에서는 도심지 토사재해 예비중점관리 대상지역 중 충주시 안림동, 대전광역시 부사동, 안동시 신안동 3개 연구지역을 선정하여 지반특성을 분석하였다. 연구지역별 특성(수관밀도, 뿌리점착력, 강우특성, 토질특성)을 이용하여 지반특성 간의 상관관계를 고찰하고, 토사재해 예측 모델링을 통해 위험지역을 예측하였다. 토사재해 위험지 예측 모델의 비교・분석을 위하여 산지토사재해 예측프로그램(LSMAP), Stability Index MAPping(SINMAP), 산림청의 산사태위험지도(LHMAP)를 활용하였으며, 토사재해 예측에 적합한 프로그램을 검토하였다. 토사재해 위험도 예측결과 일반적으로 사용되고 있는 SINMAP의 경우 과다한 범위를 위험지역으로 예측하고, 산림청 산사태위험지도(LHMAP)의 경우는 예측지역이 가장 적게 산정되었으며, LSMAP은 SINMAP 및 LHMAP의 중간 정도 범위의 지역을 위험지역으로 예측하였다. 이러한 예측 결과의 차이는 LSMAP이 비교된 두 모델에 비해 분석매개변수가 비교적 다양하고, 공학적이기 때문인 것으로 판단되며 보다 정밀한 예측이 가능하다는 것을 알 수 있었다. This study analyzed the ground characteristics region by designating 3 research areas, Anrim-dong in Chungju City, Busa-dong in Daejeon Metropolitan City and Sinan-dong in Andong City out of the areas subject to concentrated management to prepare for sediment disaster in downtown areas. The correlation between ground characteristics were observed by using characteristics (crown density, root cohesion, rainfall characteristics, soil characteristics) and the risk areas were predicted through sediment disaster prediction modeling. Landslide MAPping (LSMAP), Stability Index MAPping (SINMAP) and Landslide Hazard MAP (LHMAP) were used for the comparative analysis of the hazard prediction model for sediment disaster. As a result of predicting the sediment disaster danger, in case of SINMAP which was generally used, excessive range was predicted as a hazardous area and in case of the Korea Forest Service’s landslide hazard map (LHMAP), the smallest prediction area was assessed. LSMAP predicted a medium range of SINMAP and LHMAP as hazardous area. The difference of the prediction results is that the analysis parameters of LSMAP is more diverse and engineering than two comparative models, and it is found that more precise prediction is possible.

MBA(Muscat Bailey A) 와인의 오크통 숙성에 따른 품질 특성

최원일,박정미,박혜진,Choi, Wonil,Park, Jung-Mi,Park, Hyejin 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.1

This study was conducted in order to investigate the quality characteristics of MBA wine resulting from treatment with different oak barrel maturation methods. This study focused on the maturation of wine in five different types of barrels, including a stainless-steel maturation barrel, a foreign medium-toasted oak barrel, and domestic light, medium and heavy toasted oak barrels, and looked at the resulting differences in quality characteristics between the wines. All oak barrels used for this study had a capacity of 100 liters. The results of the study revealed that the pH content increased by up to 3.86~3.93% after 9 months, and then decreased after this point. The total anthocyanin content increased up to 152.52~174.95 mg/L during a 6 month maturation period, and thereafter began decreasing in concentration, with overall anthocyanin levels tending to be higher after maturation in foreign oak barrels. Overall, functional elements tended to measure higher after maturation in foreign oak barrels as opposed to maturation in domestic oak barrels. Therefore, these results indicate that it is necessary to improve the production of domestic oak barrels in the future in order to reliably produce wines with higher levels of functional elements.

청각단어 재인에서 나타난 한국어 단어 길이 효과

최원일,남기춘,Choi Wonil,Nam Kichun 대한음성학회 2002 말소리 Vol.44 No.-

This study was conducted to examine the effect of word length on auditory word recognition. Word length can be defined by several sublexical units, such as letters, phonemes, syllables, etc. To find out which sublexical units are influential in auditory word recognition, the auditory lexical decision task was used. In Experiment 1, we examined the partial correlation between the speed of reaction time and the number of sublexical units, and in Experiment 2, we executed ANOVA to find out which sublexical length variable was an influential unit. Through these two experiment, we concluded syllable length was the most important variable on auditory word recognition.

동결 농축 두누리 와인의 품질 특성과 휘발성 향기 성분

박혜진,최원일,한봉태,노재관,박정미,Park, Hyejin,Choi, Wonil,Han, Bongtae,Noh, Jaegwan,Park, Jung-Mi 한국식품영양학회 2019 韓國食品營養學會誌 Vol.32 No.5

The purpose of this study was to investigate the quality characteristics and volatile flavor components of Doonuri wine, using freeze concentration. The freeze concentration can increase the sugar concentration in grape juice by reducing its water content. In this study, after eight days od fermentation, the alcohol content of freeze-concentrated Doonuri wines was 12.5~14.1%. The pH of the wine was 3.42~3.50 and the total acid content was 0.68~0.94 g/100 mL, respectively. The brghtness of freeze-concentrated Doonuri wines was 19.28~54.42, the redness was 41.98~49.58, and the yellowness was 36.16~42.36. The organic acid analysis of Doonuri wines was that most of the organic acids contain tartaric and malic acid. By using freeze concentration with grape juice, significant increase in the total polyphenol content of Doonuri wines was 122.40~137.26 mg/mL, the total anthocyanin content was 117.06~118.40 mg/L and the tannic acid content was 66.23~83.70 mg%. In GC/MS analysis, the volatile flavor component analysis of Doonuri wines identified six alcohols, five esters, two ketones, on acid, two alkanes, and four other compounds.

다양한 과일을 이용한 대추와인의 품질 특성

박정미,최원일,박혜진,한봉태,노재관,Park, Jung-Mi,Choi, Wonil,Park, Hyejin,Han, Bongtae,Noh, Jaegwan 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.5

This study investigated the quality characteristics of jujube wines produced from various fruits (Campbell Early, aronia, apply). Before the preparation of jujube wine, jujube juice was extracted using hot water ($100^{\circ}C$, 2 hr). Different blends of jujube wines were produced by blending jujube juice with various fruits using Saccharomyces cerevisiae. After 18 days of fermentation, the alcohol content of jujube wines ranged between 11.5~12.7%. The pH of the wine ranged from 3.31 to 3.53 and the total acid content from 0.47 to 0.68%. The hue value of jujube wines ranged from 0.88 to 2.21 and the color intensity ranged from 0.93 to 6.29. The brightness of jujube wines ranged from 32.35 to 92.47, the redness from 0.85 to 59.05, and the yellowness from 17.35 to 51.02. By combining aronia with jujube juice, a significant increase in the total polyphenol content and the antioxidant activity (the DPPH radical scavenging activity) of the wine was observed. The total polyphenol content (401.77 mg%) and the antioxidant activity (76.29%) were the highest in the jujube wine blended with aronia. The total anthocyanin content of jujube wines ranged from 81.66 to 135.98 mg% and the tannic acid content from 42.48 to 316.36 mg%. Based on the results of the present study, we suggest that jujube wine produced by blending jujube juice with aronia had excellent quality as well as quality characteristics of the wine.

기계의 조언과 의인화 수준이 인간의 의사결정에 미치는 영향 : 의사결정 상황에서의 인간-기계 상호작용에 관한 심리학적 탐구

이상민(Sangmin Lee),최원일(Wonil Choi) 한국HCI학회 2021 한국HCI학회 논문지 Vol.16 No.1

본 연구는 기계의 의인화 수준과 조언의 특성이 인간의 의사결정에 어떤 영향을 주는지 알아보기 위해 수행되었다. 본 연구에서는 참가자에게 가상의 시나리오를 읽게 하고 그 시나리오 속 상대방에게 줄 선물을 두 가지 물건 중 고르게 하였다. 그 후 기계가 조언을 제공하도록 하고 기존 선택에 대한 자신감 변화와 실제 선택을 측정하였다. 본 연구에서 조작한 변인은 기계의 의인화 정도, 조언의 방향성(참가자의 선택을 지지하는 동방향 조언인가, 다른 선택을 하도록 하는 역방향 조언인가), 조언의 내용적 특성(물건의 쓰임새 등을 강조한 실용적 조언인가, 물건에 사회, 정서적 의미를 부여해 강조한 정서적 조언인가)이였다. 총 159명이 실험에 참여하였고, 참가자간 3원 요인설계가 사용되었다. 연구결과는 다음과 같다. 우선 본 연구의 의인화 처치 조건에 따라 기계에 대한 호감도, 기계의 발화가 얼마나 사람같이 느껴지는지에 대한 평가가 다르다는 것을 확인하여 서로 다른 수준의 의인화가 적절히 유도되었음을 확인하였다. 의사결정 시 사람들의 자신감 변화는 의인화 수준과 상관없이 조언의 방향과 내용적 특성에만 영향을 받았다. 동방향 조언일 때는 처음 선택에 대한 자신감이 증가하고 역방향 조언일 때는 감소했으며, 정서적 조언보다는 실용적 조언이 자신감에 미치는 효과가 더 컸다. 그러나 5요인 성격이론에 기반한 각 참가자들의 성격 특성을 고려했을 때 의인화와 관련된 몇 가지 흥미로운 결과들을 발견할 수 있었다. 예를 들어 자신감 변화에 대해서 성실성, 의인화 수준, 그리고 조언의 방향성 사이에 삼원상호작용이 나타났다. 동방향 조언일 때는 자신감 변화 정도가 의인화 수준이나 성실성과 유의미한 관련성이 없었지만, 역방향 조언일 경우 의인화 고수준에서는 자신감 변화와 성실성 사이에 유의미한 선형관계가 없지만 저수준에서는 성실성이 증가할수록 자신감이 감소하는 경향을 보였다. 이렇듯 사람의 특정 성격 특성과 연관되었을 때는 기계의 의인화 수준이 의사결정에 영향을 끼칠 수 있다. This study was conducted to investigate how the level of anthropomorphism and advice characteristics of machines influence human decision making. In this study, each participant was asked to read a hypothetical scenario and to choose one between two alternatives as a gift for a friend in the scenario. The machine then provided an advice, and the participants’ reactions to the machine were measured (e.g. the confidence change from the initial choice, the choice of the participant). The variables manipulated in this study were the level of anthropomorphism for the machine, the direction of the advice(the same-direction advice which supported the participants’ initial choice, or the reverse-direction advice which suggested the other choice), and the content characteristic of the advice(the practical advice which emphasized the usability of the item, or the emotional advice which added social, emotional meanings to the item). A total of 159 people participated in the experiment, and a three-way between subject factorial design was used. The results were as follows. First of all, it was confirmed that different levels of anthropomorphism were appropriately induced by showing that people liked the machine more and felt that the machine"s uttering was more similar to human in the high anthropomorphism condition than in the low condition. People were influenced only by the direction and the content characteristic of the advice, regardless of the level of anthropomorphism. Confidence in the initial choice increased in the same-direction and decreased in the reverse-direction, and the practical advice had a greater effect on confidence than the emotional advice did. However, some interesting results were found regarding the relationship between the level of anthropomorphism and the personality characteristics of each participant based on the five-factor personality theory. For example, there was a three-way interaction between the conscientiousness, the level of anthropomorphism, and the direction of advice on the confidence change, suggesting that the level of anthropomorphism for the machine can influence decision making when it was associated with a particular personality trait.

국산 시판 머루 와인의 품질 특성

박혜진,박정미,한봉태,최원일,노재관,Park, Hyejin,Park, Jung-Mi,Han, Bongtae,Choi, Wonil,Noh, Jaegwan 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.5

This study was carried out to investigate quality characteristics of Korean domestic commercial meoru wines, 8 kinds of wines were purchased from the Korea Wine Festival in 2016 and we compared the characteristics and physiological activity of 8 domestic wine. The results of this study have shown that the alcohol contents of wines ranged from 9.8 to 14.3%, pH of wines ranged from 3.86 to 4.22 and the total acidity of wines ranged from 0.56~0.75%. The hue value of meoru wines ranged from 0.81 to 1.02, The brightness of meoru wines ranged from 0.77 to 5.55, the redness from 3.97 to 31.16, and the yellowness from 0.99 to 5.63. The organic acid analysis of wine revealed lactic acid content at 4.281~9.606 mg/mL, followed by malic acid, tartaric acid, and acetic acid. The concentrations of total polyphenol and anthocyanin contents in the samples were investigated by spectrophotometric methods. Total polyphenol contents of the M8 (172.24 mg%) wine was higher than those of the other wines and total anthocyanin contents represented from 356.69 to 601.33 mg/mL. The DPPH radical scavenging activity of meoru wines was between 57.23 to 73.98%. Volatile flavor component analysis of meoru wines identified 7 alcohols, 16 esters, 5 acids, 3 terpenes and 4 other compounds.