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.

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.

흑백화상처리에 의한 씨감자 조직배양 공정의 생육상태 모니터링

최재완,정광조,문정기 ( J . W . Choi,G . J . Chung,J . G . Moon ) 한국농업기계학회 1997 한국농업기계학회 학술발표논문집 Vol.2 No.1

CASI 초분광 영상 테스트 베드 자료를 활용한 표적 탐지 기법의 성능 평가

최재완(Jae-Wan Choi),왕표(Biao Wang),노신택(Sin-Taek Noh),최도연(Do-Yoen Choi),최석근(Seok-Keun Choi) 대한공간정보학회 2014 한국지형공간정보학회 학술대회 Vol.2014 No.5

로보트 비젼을 이용한 Bin-Picking

최재완(J.W.Choi),임선종(S.J.Lim),이정규(J.G.Lee),강용근(Y.G.Gang),박경택(K.T.Park),김기엽(G.Y.Kim) 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10

This paper proposes LM method for solving bin-picking problem in robot vision. It has the processing steps such as image enchancement, image thresholding, region labelling, and moment computation. To determine a target object from bined objects, the modified labelling method is used. To determine position and orientation of holdsite, the moment method is used. Finally, some experiment results are illustated and compared with the results of conventional shrinking algorithm. The proposed LM method has reduced processing time.

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.

부하 전류에 따른 자기적 중성점 이동을 고려한 센서리스 구동용 영구자석 매입형 동기전동기(IPMSM)설계

최재완(Jae Wan Choi ),설현수(Hyun-soo Seol),정동훈(Dong-Hoon Jung),김승주(Seung-Joo Kim),이주(Ju Lee) 한국철도학회 2017 한국철도학회 학술발표대회논문집 Vol.2017 No.05

본 논문에서는 센서리스 구동용 영구자석 매입형 동기전동기(IPMSM)의 설계를 제안하였다. 센서리스 구동 시 영속 또는 저속에서는 역기전력이 매우 작기 때문에 인덕턴스에 기반한 초기 회전자 위치 추정을 한다. IPMSM은 역돌극성을 갖는 전동기로서 d축에서 인덕턴스가 최소인 특성을 갖는다. 하지만 부하 전류에 따라 자기포화가 발생하여 자기적 중성점이 이동한다면 인덕턴스의 최소 지점이 바뀌는 경우가 발생한다. 이는 인덕턴스에 기반을 둔 센서리스 제어 시 초기 회전자 위치 추정의 오류의 원인이 된다. 본 논문에서는 부하 변동에 따른 인덕턴스 위상각 변화를 줄이는 설계 방법을 제안한다. 유한 요소해석(FEA)을 통해 인덕턴스 Profile을 산출하여 제안된 방법의 타당성을 검증하였다. In this paper, We suggest Interior Permanent Magnet Synchronous Motor(IPMSM) design for sensorless drive based on inductance. When sensorless drive control, induced voltage is very small at zero speed or low speed. So It used to Rotor position estimation based on inductance. IPMSM have minimum inductance characteristic at the d-axis. however, if magnetic saturation lead to magnetic neutral point variation following the load current change, There is a change in minimum point of inductance. In this case, it can lead to failure of initial rotor position estimation. So, in this paper, We suggest IPMSM minimum inductance design at the d-axis by blocking magnetic neutral point change. After Figuring out Inductance Profile Based on the Finite Element Analysis(FEA), the result of proposed method were verified.

강수조건에 따른 도암호 부유물질 거동 평가

최재완 ( Jae Wan Choi ),신동석 ( Dong Seok Shin ),임경재 ( Kyoung Jae Lim ),이상수 ( Sang Soo Lee ),강민지 ( Min Ji Kang ) 한국환경농학회 2012 한국환경농학회지 Vol.31 No.2

BACKGROUND: The Doam watershed in Korea has been managed for the reduction and the prevention of non-point source pollution since 2007. Especially, the water quality of the Doam reservoir is a primary issue related to the Doam dam reoperation. We have carried out the modeling to evaluate the water quality based on suspended solids (SS) of the Doam watershed and the Doam reservoir. Two powerful hydrological and water quality models (HSPF and CE-QUAL-W2) were employed to simulate the combined processes of water quantity and quality both in the upland watershed of the Doam reservoir and the downstream waterbody. METHODS AND RESULTS: The HSPF model was calibrated and validated for streamflow and SS. The CE-QUAL-W2 was calibrated for water level, water temperature, and SS and was validated for the only water level owing to data lack. With the parameters obtained through the appropriate calibration, SS concentrations of inflow into and in the Doam reservoir were simulated for three years (2008, 2004 and 1998) of the minimum, the average, and the maximum of total annual precipitation during recent 30 years. The annual average SS concentrations of the inflow for 2008, 2004, and 1998 were 8.6, 10.9, and 18.4 mg/L, respectively and those in the Doam reservoir were 9.2, 13.8, and 21.5mg/L. CONCLOUSION(s): The results showed that more intense and frequent precipitation would cause higher SS concentration and longer SS`s retention in the reservoir. The HSPF and the CE-QUAL-W2 models could represent reasonably the SS from the Doam watershed and in the Doam reservoir.