다양한 강우강도 및 패턴에 따른 WEPP 모형의 유출?첨두유출?토양유실량 평가

최재완,류지철,김익재,임경재,Choi, Jae-Wan,Ryu, Ji-Chul,Kim, Ik-Jae,Lim, Kyoung-Jae 한국수자원학회 2012 한국수자원학회논문집 Vol.45 No.8

최근 강우강도 및 패턴이 변화함에 따라 전세계적으로 토양유실이 증가하고 있다. 그 결과, 수생태계 건전성이 악화되고, 농업작물이 피해를 입어 수확량이 감소된다. 그동안 유출 및 토양유실을 예측하거나 비점오염원을 감소시키는 연구가 많이 수행되어 왔다. USLE는 수년간 토양유실을 산정하는데 사용되어왔으나, 강우강도나 패턴변화를 적용하기에는 적절하지 못했다. 물리적 기반인 WEPP 모형은 다양한 강우강도 및 패턴변화를 적용하는데 적절하다. 본 연구에서는 WEPP 모형을 이용하여 Huff의 4분위, 다양한 강우간격, 설계강우에 따른 토양유실, 유출, 첨두유출을 산정하였다. 5분간격 강우 데이터와 60분 간격 강우 데이터를 비교한 결과 토양유실은 24%, 유출은19%, 첨두유출은 16%가 차이나는 것으로 나타났다. 유출 및 토양유실이 5분 간격 강우량에서 실측치와 가장 유사한 것으로 나타나 강우데이터의 간격이 짧을수록 더 정확하게 모의할 수 있는 것으로 나타났다. Huff의 4분위를 이용하여 토양유실량, 유출량, 첨두유출량을 산정한 결과 토양유실량, 유출량, 첨두유출량 모두 3분위에서 가장 높게 발생하는 것으로 나타났다. 강원도 홍천지역 빈도별 확률강우를 이용하여 토양유실량, 유출량, 첨두유출량의 변화를 모의하였다. 2년 빈도와 300년 빈도에서 강우량은 167% 증가하였다. 유사량과 유출량, 첨두유출량은 각각 906.2%, 249.4%, 183.9% 증가하여 유사량의 증가율이 가장 큰 것으로 나타났다. 본 연구의 결과에서 보이는 바와 같이 WEPP 모형을 이용하여 향후 기후변화에 따른 유출 및 토양유실의 예측이 가능할 것으로 판단된다. Recently, changes in rainfall intensity and patterns have been causing increasing soil loss worldwide. As a result, the water ecosystem becomes worse and crops yield are reduced with soil loss and nutrient loss with it. Many studies have been proposed to estimate runoff and soil loss to predict or decrease non-point source pollution. Although the USLE has been used for many years in estimating soil losses, the USLE cannot reflect effects on soil loss of changes in rainfall intensity and patterns. The WEPP, physically based model, is capable of predicting soil loss and runoff using various rainfall intensity. In this study, the WEPP model was simulated for sediment yield, runoff and peak runoff using data of 5, 10, 30, 60 minute term rainfall, Huff's method and design rainfall. In case of rainfall interval of 5 minutes and 60 minutes, the sediment and runoff values decreased by 24% and 19%, respectively. The peak rate runoff values decreased by 16% when rainfall interval changed from 5 minutes to 60 minutes, indicating the peak rate runoff values are affected by rainfall intensity to some degrees. As a result of simulating using Huff's method, all values (sediment yield, runoff, peak runoff) were found to be the greatest at third quartile. According to the analysis under various design rainfall conditions (2, 3, 5, 10, 20, 30, 50, 100, 200, 300 years frequency), sediment yield, runoff, and peak runoff of 906.2%, 249.4% and 183.9% were estimated using 2 year to 300 year frequency rainfall data.

대사증후군에 대한 사상체질별 허리둘레 및 체질량지수의 절단값에 대한 연구

최재완,유준상,Choi, Jae-Wan,Yu, Jun-Sang 사상체질의학회 2014 사상체질의학회지 Vol.26 No.4

Objectives This study was performed to investigate the cut-off values of abdominal circumference and Body Mass Index(BMI) according to Sasang Constitution. Methods A total of 1,773 persons, namely 440 male people and 1,333 female people, in ages from 40 to 69 years old, participated in this research. They are all included in the community based Genomic cohort in Wonju in years from 2006 to 2013. The diagnostic criteria of metabolic syndrome was used followed by the National Cholesterol Education Program in Adult Treatment Panel III (NCEP ATP III) and Asian pacific guideline for only abdominal obesity. Results The prevalence of metabolic syndrome was 34.8% for men and 37.6% for women in this research. Taeeumin was the highly significant risk type for the metabolic syndrome in both sexes. Cut-off values of abdominal circumference were 88.3 cm in men, 80.3 cm in women, and cut-off values of BMI were $24.2kg/m^2$ in men and $25.3kg/m^2$ in women. For men, cut-off values of abdominal circumference were 79.5cm in Soyangin, 88.8 cm in Taeeumin and 79.5 cm in Soeumin, and cut-off values of BMI were $23.2kg/m^2$ in Soyangin, $25.6kg/m^2$ in Taeeumin and $20.6kg/m^2$ in Soeumin. For women, cut-off values of abdominal circumference were 76.3 cm in Soyangin, 80.3 cm in Taeeumin and 76.8 cm in Soeumin, and cut-off values of BMI were $22.4kg/m^2$ in Soyangin, $24.9kg/m^2$ in Taeeumin and $21.3kg/m^2$ in Soeumin. Conclusions Although 90 cm in men, 80 cm in women as an Asian pacific guideline were regarded as quite approximate to the mean value of abdominal circumference and $25kg/m^2$ to BMI. But if the results could be allocated in terms of the Sasang constitutional method, the cut-off values for Soyangin and Soeumin should be lowered than now.

사상체질음성분석기(四象體質音聲分析機)(PSSC)를 통한 한국인 성인남성(成人男性)의 체질별(體質別) 음향특성연구(音響特性硏究) - 단문(短文)을 중심으로 -

최재완,송학수,한동윤,조성언,왕향란,전종원,김달래,유준상,Choi, Jae-Wan,Song, Hak-Soo,Han, Dong-Youn,Cho, Sung-Eon,Wang, Hyang-Lan,Jeon, Jong-Weon,Kim, Dal-Rae,Yoo, Jun-Sang 사상체질의학회 2006 사상체질의학회지 Vol.18 No.3

1. Objectives and Methods A Study on the Characteristics of the Korean Adult Male Sound according to Sasang Constitution using PSSC with a Sentence. Sasang Constitutional Medicine(SCM) is the one of the traditional Korean Medicine. It classifies people into four categories like Taeyangin, Soyangin, Taeumin and Soeumin. The rule to classify is Appearance and Body Shape, Facial Appearance and Speech, Character and Talents and Diseases and Medications. This study was done to investigate the relationships between Voice and Sound parameters using PSSC(Phonetic System of Sasang Constitution) in a sentence. Experimental Participants were 195 Korean adult males including 1 Taeyangin, 37 Soyangin, 105 Taeumin and 52 Soeumin. Sasang Constitutional specialist used PSSC and Korean Medical Diagnosis to classify participants into four constitution. 2. Results In Pitch segment, Soyangin's Center freq.(4) was significantly high compared with Taeyangin and Taeumin groups. Soyangin's and Soeumin's Center freq.(6) was significantly high compared with Taeyangin and Taeumin groups. In APQ segment and Octave segment, there were no significant differences among four groups. In Shimmer segment, Taeumin's F Shimmer(1) and F Shimmer(2) were significantly high compared with Taeyangin and Soyangin groups. In Energy segment, Taeyangin's 2k-4k total sum, 2k-4k dev., C dev., C# dev. and D S.D. were significantly high compared with other groups. In Recording time segment, there was no significant difference among four groups. More Taeyangin cases and the other parameters are needed to determine constitution using PSSC and to make PSSC effective. 3. Conclusions From above result, there is the possibility of efficiency standard guide for constitution diagnosis by analyzation og voice.

펄스레이저 증착법에 의해 성장된 ZnO 박막의 특성 관찰

최재완,지현진,정창욱,이보화,김규태,Choi, Jae-wan,Ji, Hyun-jin,Jung, Chang-Uk,Lee, Bo-Hwa,Kim, Gyu-Tae 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.2

The semiconducting material of ZnO in II-VI group was well known as its good application for photo electronics, chemical sensors and field effect transistors due to the remarkable optical properties with wide energy band gap and great ionic reactivities. Up to now the growth of a good quality of ZnO film has been issued for better performances. Even though there were many deposition methods for making ZnO films, pulse laser deposition methods have been preferred for high crystalline films. In this report, the ZnO film was also created by pulsed laser deposition technique which also showed high crystalinity. By controlling several factors when deposited, it was investigated that the optimal condition for ZnO film formation. Mainly, oxygen partial pressures and growth temperatures were changed when ZnO films were synthesized and followed the characterization by HRXRD and AFM.

수질관리 : WEPP 모형을 이용한 강우강도 변화에 따른 유출 및 첨두유출량 산정

최재완 ( Jae Wan Choi ),신민환 ( Min Hwan Shin ),이재운 ( Jae Woon Lee ),이열재 ( Yeoul Jae Lee ),현근우 ( Geun Woo Hyun ),김익재 ( Ik Jae Kim ),임경재 ( Kyoung Jae Lim ) 한국물환경학회 ( 구 한국수질보전학회 ) 2009 공동 추계학술발표회 Vol.2009 No.-

초분광영상 자료를 활용한 표적탐지 알고리즘의 성능분석 및 평가

최재완 ( Jae Wan Choi ) 충북대학교 건설기술연구소 2014 建設技術論文集 Vol.33 No.1

연속적인 분광정보(spectral profile)의 집합으로 이루어진 초분광 영상은 개체에 대한 분광파장대 별 세부 정보를 취득할 수 잇으면, 개체 간의 미세한 분광차를 분석할 수 있기 때문에 영상분류, 변화탐지, 개체 추출을 비롯하여 산림, 수질 분석, 국방분양에 등 다양한 분야에 활용가능한 가능성을 가지고 있다. 특히, 영상 내에 존재하는 특정 물체의 존재 유무를 감지하는 표적 탐지 알고리즘은 가장 대표적인 초분광 영상의 활용을 분야 중 하나이다. 대부분의 표적 탐지 기법은 통계값 혹은 신호처리 기법을 기반으로 구성되어 잇으며, Constrained Energy Minimization (CEM), Adaptive Cosine Estimator (ACE), Matched filter(MF), Generalized Likehood Ratio Test (GLRT) 기법이 널리 사용되고 있다. 본 연구에서는 표적탐지 기법에 사용할 수 있는 테스트 베드를 구축하고, 이를 촬영한 초분광 영상을 취득하여 위의 4종류의 표적탐지 알고리즘의 성능을 비교평가하고자 하였다. 실험결과, ACE 및 GLRT 기법이 상대적으로 높은 표적팀지율을 보임을 시각적으로 확인하였다. 또한, 대부분의 표적탐지 기법에서 발생하는 오탐지율을 최소화하기 위하여 표적탐지 기법의 알고리즘 개선이 필요하다고 판단되였다. Hyperspectral remote sensing data have a huge potential to apply various applications, such as image classification, change detection, feature extraction, water bodies, vegetation and defense applications, because each pixel into the hyperspectral data, which is composed of a contionuous spectral profile, includes detailde description about features and enables to analyze specific difference among features. Especially, targer detection algorithm, which labels each pixel as target in image, is one of the representative application in hyperspectral image processing. Most target detection algorithms are based on statistics and signal processiong. Among various target detection algorithms, Constrained Energy Minimization (CEM),Adaptive Cosine Estimator (ACE), Matched Filter(MF), Generalized Likehood Ratio Test (GLRT) are widely used in remote sensing fields. In this paper, test-bed dataset for estimating target detection algorithms are constructed and four target detection algorithms, such as CEM, ACE, MF and GLRT, are applied in test-bed data. Experiment results shows that results by ACE and GLRT algorithms have a better target detection accuracy compared to MF and CEM, visually, In addition, modification of these algorithms should be required in order to minimize false alarms or errors of most target detection algorithms.

WEPP 모형을 이용한 골프장 잔디 관리에 따른 유출특성 모의

최재완 ( Jae Wan Choi ),신민환 ( Min Hwan Shin ),류지철 ( Ji Chul Ryu ),금동혁 ( Dong Hyuk Kum ),강현우 ( Hyun Woo Kang ),천세억 ( Se Uk Cheon ),신동석 ( Dong Seok Shin ),임경재 ( Kyoung Jae Lim ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.1

It has been known that Golf course could impose negative impacts on water-ecosystem if pollutant-laden runoff is not treated well. It is important to control non-point source and re-use treated wastewater from the golf course to secure water quality of receiving waterbodies. At golf courses, the rainfall-runoff is affected by various practices to manage grasses. In many hydrological modelings, especially in simple rainfall-runoff modeling, effects on runoff of plant growth and cutting are not considered. In the study, the water erosion prediction project (WEPP), capable of simulating plant growth and various management, was evaluated for its runoff prediction from golf course under grass cutting and irrigation. The %Difference, R2 and the NSE for runoff comparisons were 1.15%, 0.93 and 0.92 for calibration, and 18.12%, 0.82 and 0.88 for validation period, respectively. In grass cutting scenario, grass height was managed to be 18~25 mm. The estimated runoff was decreased by 27%. The difference in estimated total runoff was 11.8% depending on irrigation. As shown in this study, if grass management and irrigation are well-controlled, water quality of downstream areas could be obtained.

효율적인 일괄 이미지 관리 방법에 대한 연구

최재완(Jae-Wan Choi),김태은(Tae-Eun Kim) 한국디지털콘텐츠학회 2008 한국디지털콘텐츠학회논문지 Vol.9 No.4

캐릭터의 시각적 묘사에 내재된 내러티브 유형 연구

최재완(Choi, Jae Wan) 한국디지털디자인협의회 2013 디지털디자인학연구 Vol.13 No.2

1967년부터 제작 되어 반세기의 애니메이션 영화 역사 속에서 캐릭터는 내러티브의 주축이 되었다. 내러티브는 사회 상황을 반영하는 중요한 매개체가 되었으며 시대가 변화하면서 내러티브도 변화를 겪게 된다. 이에 한국 애니메이션 영화 속의 캐릭터를 통해 내러티브 변화를 파악하고자 한다. 본 연구에서는 137편의 한국 장편 애니메이션 캐릭터를 연구 대상으로 했으며, 시각적 내용분류를 통해 내러티브를 연구하고자 했다. 기존연구를 바탕으로 내러티브유형을 14가지로 분류하였다. 137편의 애니메이션 캐릭터에 14가지 유형을 적용시켰으며, 10가지의 내러티브가 내재되어 있음을 파악하였다. 10가지 유형(액션, SF, 모험, 비현실, 코미디, 범죄, 스포츠, 멜로, 드라마, 무협)을 기준으로 분류 및 분석하였다. 그리고 내러티브유형에 대한 시대별 흐름을 파악한다. 그 결과 액션, SF, 모험, 드라마, 비현실 등의 순으로 많이 나타나고 있음을 파악 하였다. 또한 시대별 유형 분포로는 1970~1990년대는 액션유형과 SF유형이 주를 이루었으며, 2000년대에는 드라마유형의 캐릭터가 주를 이루는 것으로 나타났다. 이러한 현상으로 비추어 볼 때 캐릭터의 시각적 묘사 성향이 외향성에서 내향성으로, 그리고 동적에서 정적으로 변하고 있음을 파악하였다. 본 연구는 애니메이션 캐릭터의 시각적 묘사에 내재된 내러티브를 파악하고자 했다. 그 결과 다양한 내러티브와 시대에 따라 캐릭터의 내러티브에 변화가 있다는 사실을 알 수 있었다. Characters have been in the middle of narrative in the history of animation movies in half century since 1967. Narratives became important media reflecting social situations and they got experienced changes with time change. Accordingly, this study tried to identify the changes in narratives through the characters in Korean animation movies. In this study, animation characters in 137 Korean full-length films were studied, and narratives were studied through visual contents classification. Based on the existing studies, narratives were classified into 14 types. Such 14 types were applied to the characters in 137 animations, and 10 kinds of narratives were identified from them. Those 137 animations were classified and analyzed based on the 10 categories (action, SF, adventure, fantasy, comedy, criminal, sports, melo, drama and martial arts). Additionally, it identified trend of narratives according to time change. According to the analysis results, the most frequently shown category was in the order of action, SF, adventure, drama and fantasy. In the distribution according to time, action and SF were dominant from 1970s to 1990s, and drama type characters were dominant in 2000s. Considering this phenomenon, it was identified that visual description of characters was changed from extrovert to introvert and from dynamic to static. This study tried to identify narratives built in visual description of animation characters. As a result, it was found that there were changes in narratives of characters according to various narratives and time.

< 전시-P-02 > 공주 마곡사 대웅보전 수종 연구

최재완 ( Jae Wan Choi ),박정혜 ( Jung Hae Park ),김수철 ( Soo Chul Kim ) 한국목재공학회 2018 한국목재공학회 학술발표논문집 Vol.2018 No.2