감열색소 중간체 ( 2-methyl-4-methoxy aniline ) 의 제조

강철우(Chul Woo Kang),김동현(Dong Hyun Kim),김기석(Ki Seok Kim),이태진(Tae Jin Lee),김재창(Jae Chang Kim) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.2

2-Methyl-4-methoxy aniline, an intermediate of the ODB-2 was synthesized from various aromatic compounds by using acid and base catalysts. With liquid sulfuric acid catalyst and Pt/C hydrogenation catalyst, an 80% yield was obtained from ortho-nitro toluene. The reaction followed the Bemberger reaction mechanism and the byproduct produced was toluidine resulted from a complete reduction of the reactant. To obtain 2-methyl-4-methoxy aniline from 3-methyl-4-nitro phenol, a one step reaction using NaOH and Pt/C hydrogenation catalysts was carried out under hydrogen pressure. The rate determining step was the alylation of the hydroxyl group in the phenol compound to form the corresponding anisole and the yield was 80%. In this route, however, the only byproduct formed, 3-methyl-4-amino phenol could be easily separated from the reaction mixture by washing with water and converted to the final desired product by a simple methoxylation with DMSA to give to an overall yield of 92 %.

스쿠버다이빙 체험에 따른 즐거움 및 체험가치, 관광행동의 구조적 관계

강철우(Kang, Chul-Woo),서대원(Seo, Dae-Won),권태성(Kwon, Tae-Sung) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.3

The purpose of this study was to investigate enjoyment, tour value and tourism behavioral of people who experienced scuba diving. To achieve the goal of this study, researchers used convenient sampling method and surveyed 300 scuba-divers who visited a scuba resort which located in kangwon-do districts from August 1 to August 30, 2017. Among collected answers, 13 unsuitable answers were excluded and used rest 287 answers for analyses. Using PASW Ver. 18.0 and AMOS 18.0, researchers conducted frequency analysis, internal consistence reliability analysis, confirmatory factor analysis, correlation analysis and structural equation modeling to verify the hypotheses. Based on the results, researchers founded several facts. Firstly, scuba diving experience is a positive factor of enjoyment. Secondly, scuba diving experience is a positive factor of tour value. Third, scuba diving experience is a positive factor of tourism behavioral. Fourthly, enjoyment of Scuba diving is a positive factor of tourism behavioral. Lastly, tour value of Scuba diving is a positive factor of tourism behavioral.

태권도 전공 대학생의 운동능력에 대한 암묵적 믿음과 자기조절능력 및 운동지속의 관계

강철우(Kang, Chul-Woo) 한국사회체육학회 2016 한국사회체육학회지 Vol.0 No.63

The purpose of this study was to analyze Relationship among Implicit Beliefs on ability of exercise, selfcontrol ability and Exercise Adherence by college students whom ajor in Taekwondo. For this purpose, The subjects of this study were university students who are enrolled at physical education department in 4-yearuniversity in Seoul and Gyeonggi province. A total of 250 questionnaires were distributed by using a convenience sampling method. Among 250 questionnaires, 17 copies were found unusable because they were incomplete. So a total of 233 questionnaires were used in actual data analysis. Data which is obtained through self-administration was analyzed using by the frequency analysis, correlation coefficient, factor analysis and multiple regression. The results of analysis are as follows. First, Implicit Beliefs of Taekwondo major college students had a positive influence on self-control ability. Second, Implicit Beliefs of Taekwondo major college students had positive influence on Exercise Adherence. Third, self-control ability of Taekwondo major college students had positive influence on Exercise Adherence. Data which is obtained through self-administration was analyzed using by the frequency analysis, correlation coefficient, factor analysis and multiple regression. Results are as follows.

스포츠용품 매장의 직원-고객 간 언어적·비언어적 커뮤니케이션, 서비스품질 지각이 만족 및 매장평판에 미치는 영향

강철우(Kang, Chul-Woo) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.5

The purposes of this study were to investigate the Effect of Verbal-Nonverbal communications between clerks and customers, and perceived service qualities on satisfaction and reputations of Sports Stores. The data was collected from 331 clerks in Sports Stores which were located in Seoul and Kyungki and then it was analyzed by using a SPSS 18.0 for Windows was used and reliability analysis were made. In order to abstracted factors through structure equation model using AMOS 18.0, confirmatory factor analysis was made. The results of analysis are as follows. The outcomes of survey are as follows. First, Verbal-Nonverbal communications of Sports Stores clerks employees had positive influence on service qualities. Second, service qualities of Sports Stores clerks employees had positive influence on satisfaction. Third, service qualities of Sports Stores clerks employees had positive influence on Stores reputations. fourth, satisfaction of Sports Stores clerks employees had positive influence on Stores reputations.

태권도 전공 대학생들의 사회적 지지에 따른 긍정정서, 진로적응 및 주관적 안녕감의 구조적 관계 분석

강철우(Kang, Chul-Woo) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.5

The purpose of this study was to analyze structure relationship among social support, positive emotion, career adaptability and subjective well-being by Taekwondo major college students. For this purpose, The subjects of this study were university students who are enrolled at physical education department in university in Seoul and Gyeonggi province. A total of 400 questionnaires were distributed by using a convenience sampling method. questionnaires, 19 copies were found unusable because they were incomplete. So a total of 381 questionnaires were used in actual data analysis. For the analysis of data, SPSS 18.0 was used and reliability analysis and correlation analysis were made. In order to abstracted factors through structure equation model(path analysis) using AMOS 18.0, confirmatory factor analysis was made. The results of analysis are as follows. First, social support of Taekwondo major college students had a positive influence on positive emotion. Second, social support of Taekwondo major college students had positive influence on career adaptability. Third, social support of Taekwondo major college students had positive influence on subjective well-being. fourth, positive emotion of Taekwondo major college students had a positive influence on career adaptability. fifth, positive emotion of Taekwondo major college students had positive influence on subjective well-being. sixth, career adaptability of Taekwondo major college students had positive influence on subjective well-being.

변형된 오일러각 기반의 칼만필터를 이용한 자세 추정 성능 향상

강철우(Chul Woo Kang),유영민(Young Min Yoo),박찬국(Chan Gook Park) 제어로봇시스템학회 2008 제어·로봇·시스템학회 논문지 Vol.14 No.9

To calculate the attitude in ARS(Attitude Reference System) using 3 gyros and 3 accelerometers, gyro drift must be compensated with accelerometer to avoid divergence of attitude error. Kalman filter is most popular method to integrate those two sensor outputs. In this paper, new Kalman filtering method is proposed for roll and pitch attitude estimation. New states are defined to make linear equation and algorithm for changing Kalman filter parameters is proposed to ignore disturbances of acceleration. This algorithm can be easily applied to low cost ARS

웨이블릿 임계화 기법을 이용한 INS-GPS 결합항법 시스템의 성능향상

강철우(Chul Woo Kang),박찬국(Chan Gook Park),조남익(Nam Ik Cho) 한국항공우주학회 2009 韓國航空宇宙學會誌 Vol.37 No.8

본 논문에서는 웨이블릿 잡음제거 기법 중 하나인 임계화 기법을 이용하여 관성센서 신호의 잡음을 제거하면서도 운동에 의한 신호변화는 상대적으로 왜곡이 적은 필터링기법을 제안하였다. 이는 기존 연구들이 웨이블릿의 장점을 충분히 활용하지 못하고 저역통과 필터와 같은 형태로 사용되기 때문에 급격히 변화하는 항체에 대하여는 부적합한 점을 개선하기 위한 것이다. 제안된 방법의 성능 확인을 위하여 INS-GPS 결합항법 시스템에 적용하였다. This research have introduced wavelet signal processing technic for improving navigation signals. INS signals can be distorted with conventional pre-filtering method such as low-pass filtering by unwanted smoothing on real signals. But in this paper, wavelet thresholding method is implemented to INS signal to denoise for INS-GPS integrated system. This method reduces signal noise but not distorts the rapid varing signal. And this paper applied thresholding to INS-GPS integrated navigation system and improved navigation performance.

대학 태권도 지도자의 신뢰 요인과 긍정적 감정이 수련만족과 지도효율성에 미치는 영향

강동화 ( Kang Dong-hwa ),강철우 ( Kang Chul-woo ),홍병진 ( Hong Byung-jin ) 국기원 2018 국기원태권도연구 Vol.9 No.2

본 연구는 태권도 지도자의 신뢰와 긍정적 감정이 수련만족 및 지도효율성에 미치는 영향을 규명하여 태권도 지도자가 갖추어야 할 중요한 신뢰적 요인과 선수들의 보다 나은 경기력 및 성과 제공을 위한 기초자료를 제공하는데 그 목적이 있다. 본 연구의 대상은 서울, 경기도, 충청도, 전라북도 및 전라남도 지역에 소재하고 있는 8곳의 대학 태권도 선수를 모집단으로 선정하였으며, 각각 50부씩 총 400부의 설문지를 배포하여 최종 379부의 자료가 결과분석에 이용되었다. 본 연구의 자료처리 방법은 SPSS 22.0을 이용하여 빈도분석, 탐색적 요인분석, 신뢰도분석, 상관관계분석, 다중회귀분석 및 단순회귀분석이 이용되었으며, 연구방법 및 결과를 바탕으로 다음과 같은 결론을 도출하였다. 첫째, 태권도 지도자의 신뢰요인 중 능력과 성실성은 수련만족에 유의한 영향을 미치는 것으로 나타났다. 둘째, 태권도 지도자의 신뢰요인 중 일관성, 능력, 성실성, 이타성은 지도효율성에 유의한 영향을 미치는 것으로 나타났다. 셋째, 태권도 지도자에 대한 긍정적 감정은 수련만족에 유의한 영향을 미치는 것으로 나타났다. 넷째, 태권도 지도자의 긍정적 감정은 지도효율성에 유의한 영향을 미치는 것으로 나타났다. 다섯째, 태권도 수련만족은 지도효율성에 유의한 영향을 미치는 것으로 나타났다. This research examines the effect of trust and positive emotion of Taekwondo instructors on training satisfaction and coaching efficiency to provide basic data to come up with understanding for university Taekwondo athletes. The participants of this research were university Taekwondo athletes in Seoul, Gyeonggi-do, Chungcheong-do, and Jeollabuk-do region, and 379 questionnaires were used for analyses frequency analysis, EFA(exploratory factor analysis), Cronbach’s alpha(reliability analysis), correlation relative analysis, multiple regression analysis and simple regression analysis were performed using SPSS 22.0. The result were as follows: Firstly, the dimensions of Taekwondo instructors’ trust, consistency, ability, sincerity, and altruism had significant influence on coaching efficiency. Secondly, the dimensions of Taekwondo instructors’ trust, consistency, ability, sincerity, and altruism had significant influence on coaching efficiency. Thirdly, positive emotion of Taekwondo instructor had significant influence on training satisfaction. Fourthly, positive emotion of Taekwondo instructor had significant influence on coaching efficiency. Lastly, training satisfaction had significant influence on coaching efficiency.

대학 태권도 지도자 이미지가 긍정적 감정, 신뢰, 운동 몰입 및 운동지속에 미치는 영향

최명수(Choi, Myung-Soo),강철우(Kang, Chul-Woo),홍병진(Hong, Byung-Jin) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.1

The purpose of this study was to verify the relationship between image of university Taekwondo instructor and various variables(positive emotions toward university Taekwondo instructor, trust in instructor, exercise commitment, and adherence) for basic data and understanding instructor image. The subjects of this study was college Taekwondo athlete of six region university and 587 questionnaires were used as the final statistics data. The SPSS 22.0 programs were used to frequency analysis, EFA (exploratory factor analysis), reliability analysis, correlation analysis, and multiple regression analysis. The results are as follow: First, role, job awareness, disposition, and profession of image’s sub factors in Taekwondo instructor had significant influence on positive emotions. Second, role, disposition, and profession of image’s sub factors in Taekwondo instructor had significant influence on trust in instructor. Third, role and disposition of image’s sub factors in Taekwondo instructor had significant influence on cognitive commitment Forth, role of image’s sub factors in Taekwondo instructor had significant influence on behavioral commitment. Fifth, role, disposition and profession of image’s sub factors in Taekwondo instructor had significant influence on exercise adherence.

인공위성의 동역학과 토크 외란을 고려한 큐브위성의 식 기간 자세추정

최성혁(Sung Hyuk Choi),강철우(Chul Woo Kang),박찬국(Chan Gook Park) 한국항공우주학회 2016 韓國航空宇宙學會誌 Vol.44 No.4

인공위성의 자세추정은 결정론적 방법과 재귀적인 방법으로 나눌 수 있는데, 이 중 재귀적인 방법으로는 칼만 필터를 사용하여 자세를 추정하는 알고리즘이 널리 사용되고 있다. 초소형 큐브 위성의 경우 많은 탑재체를 실을 수 없기에 최소한의 자세 센서만을 이용해야 하는 제한점이 있다. 미션에 따라 식 기간 및 태양 센서의 데이터 이용이 불가능할 때에도 인공위성의 자세추정은 계속 되어야 인공위성은 임무를 성공적으로 완수할 수 있게 된다. 본 연구에서는 일반적인 인공위성의 자세추정 기법을 기반으로 큐브위성의 동역학과 토크외란을 고려하여 알고리즘을 발전시켜 식 기간에서도 더욱 정확한 자세 추정이 가능하도록 하였다. 제안된 알고리즘은 시뮬레이션을 통해 기존의 자세추정 방법과 비교하여 그 성능을 검증하였다. 또한 위성체가 우주 환경에서 운용되면서 받을 수 있는 다양한 크기의 토크외란에 따른 자세추정 오차를 분석하였다. Attitude determination of satellite is categorized by deterministic and recursive method. The recursive algorithm using Kalman filter is widely used. Cubesat has limitation for payload to minimize then only two attitude sensors are installed which are sun sensor and magnetometer. Sun sensor measurements are useless during eclipse, however cubesat keeps estimating attitude to complete the successful mission. In this paper, Attitude determination algorithm based on Kalman filter is developed by additional term which considering the dynamics for SNUSAT-1 with disturbance torque. Verification of attitude accuracy of the algorithm is conducted during eclipse. Attitude determination algorithm is simulated to compare the performance between typical method and proposed algorithm. In addition, Attitude errors are analysed with various magnitude of disturbance torque caused by space environment.