아마추어 테니스 대회의 활성화를 위한 문제요인 도출

차정훈,강혜연 한국디지털정책학회 2018 디지털융복합연구 Vol.16 No.3

DEVELOPMENT OF A COMPUTER PROGRAM FOR AN ANALYSIS OF THE LOGISTICS AND TRANSPORTATION COSTS OF THE PWR SPENT FUELS IN KOREA

차정훈,최희주,이종열,최종원 대한방사선방어학회 2009 방사선방어학회지 Vol.34 No.1

It is expected that a substantial amount of spent fuels will be transported from the four nuclear power plant (NPP) sites in Korea to a hypothetical centralized interim storage facility or a final repository in the near future. The cost for the transportation is proportional to the amount of spent fuels. In this paper, a cost estimation program is developed based on the conceptual design of a transportation system and a logistics analysis. Using the developed computer program, named as CASK, the minimum capacity of a centralized interim storage facility (CISF) and the transportation cost for PWR spent fuels are calculated. The PWR spent fuels are transported from 4 NPP sites to a final repository (FR) via the CISF. Since NPP sites and the CISF are located along the coast, a sea-transportation is considered and a road-transportation is considered between the CISF and the FR. The result shows that the minimum capacity of the interim storage facility is 15,000 MTU.

Prediction from Linear Regression Equation for Nitrogen Content Measurement in Bentgrasses leaves Using Near Infrared Reflectance Spectroscopy

차정훈,김경덕,박대섭 한국잔디학회 2009 Weed & Turfgrass Science Vol.23 No.1

Near Infrared Reflectance Spectroscopy(NIRS) is a quick, accurate, and non-destructive method to measure multiple nutrient components in plant leaves. This study was to acquire a liner regression equation by evaluating the nutrient contents of ‘CY2’ creeping bentgrass rapidly and accurately using NIRS. In particular, nitrogen fertility is a primary element to keep maintaining good quality of turfgrass. Nitrogen, moisture, carbohydrate, and starch were assessed and analyzed from ‘CY2’ creeping bentgrass clippings. A linear regression equation was obtained from accessing NIRS values from NIR spectrophotometer(NIR system, Model XDS, XM-1100 series, FOSS, Sweden) programmed with WinISI III project manager v1.50e and ISIscan® (Infrasoft International) and calibrated with laboratory values via chemical analysis from an authorized institute. The equation was formulated as MPLS(modified partial least squares) analyzing laboratory values and mathematically pre-treated spectra. The accuracy of the acquired equation was confirmed with SEP(standard error of prediction), which indicated as correlation coefficient(r2) and prediction error of sample unacquainted, followed by the verification of model equation of real values and these monitoring results. As results of monitoring, r2 of nitrogen, moisture, and carbohydrate in ‘CY2’ creeping bentgrass was 0.840, 0.904, and 0.944, respectively. SEP was 0.066, 1.868, and 0.601, respectively. After outlier treatment, r2 was 0.892, 0.925, and 0.971, while SEP was 0.052, 1.577, and 0.394, respectively, which totally showed a high correlation. However, r2 of starch was 0.464, which appeared a low correlation. Thereof, the verified equation appearing higher r2 of nitrogen, moisture, and carbohydrate showed its higher accuracy of prediction model, which finally could be put into practical use for turf management system. Near Infrared Reflectance Spectroscopy(NIRS) is a quick, accurate, and non-destructive method to measure multiple nutrient components in plant leaves. This study was to acquire a liner regression equation by evaluating the nutrient contents of ‘CY2’ creeping bentgrass rapidly and accurately using NIRS. In particular, nitrogen fertility is a primary element to keep maintaining good quality of turfgrass. Nitrogen, moisture, carbohydrate, and starch were assessed and analyzed from ‘CY2’ creeping bentgrass clippings. A linear regression equation was obtained from accessing NIRS values from NIR spectrophotometer(NIR system, Model XDS, XM-1100 series, FOSS, Sweden) programmed with WinISI III project manager v1.50e and ISIscan® (Infrasoft International) and calibrated with laboratory values via chemical analysis from an authorized institute. The equation was formulated as MPLS(modified partial least squares) analyzing laboratory values and mathematically pre-treated spectra. The accuracy of the acquired equation was confirmed with SEP(standard error of prediction), which indicated as correlation coefficient(r2) and prediction error of sample unacquainted, followed by the verification of model equation of real values and these monitoring results. As results of monitoring, r2 of nitrogen, moisture, and carbohydrate in ‘CY2’ creeping bentgrass was 0.840, 0.904, and 0.944, respectively. SEP was 0.066, 1.868, and 0.601, respectively. After outlier treatment, r2 was 0.892, 0.925, and 0.971, while SEP was 0.052, 1.577, and 0.394, respectively, which totally showed a high correlation. However, r2 of starch was 0.464, which appeared a low correlation. Thereof, the verified equation appearing higher r2 of nitrogen, moisture, and carbohydrate showed its higher accuracy of prediction model, which finally could be put into practical use for turf management system.

Prediction from Linear Regression Equation for Nitrogen Content Measurement in Bentgrasses leaves Using Near Infrared Reflectance Spectroscopy

차정훈,김경덕,박대섭,Cha, Jung-Hoon,Kim, Kyung-Duck,Park, Dae-Sup Turfgrass Society of Korea 2009 한국잔디학회지 Vol.23 No.1

Near Infrared Reflectance Spectroscopy(NIRS) is a quick, accurate, and non-destructive method to measure multiple nutrient components in plant leaves. This study was to acquire a liner regression equation by evaluating the nutrient contents of 'CY2' creeping bentgrass rapidly and accurately using NIRS. In particular, nitrogen fertility is a primary element to keep maintaining good quality of turfgrass. Nitrogen, moisture, carbohydrate, and starch were assessed and analyzed from 'CY2' creeping bentgrass clippings. A linear regression equation was obtained from accessing NIRS values from NIR spectrophotometer(NIR system, Model XDS, XM-1100 series, FOSS, Sweden) programmed with WinISI III project manager v1.50e and ISIscan(R) (Infrasoft International) and calibrated with laboratory values via chemical analysis from an authorized institute. The equation was formulated as MPLS(modified partial least squares) analyzing laboratory values and mathematically pre-treated spectra. The accuracy of the acquired equation was confirmed with SEP(standard error of prediction), which indicated as correlation coefficient($r^2$) and prediction error of sample unacquainted, followed by the verification of model equation of real values and these monitoring results. As results of monitoring, $r^2$ of nitrogen, moisture, and carbohydrate in 'CY2' creeping bentgrass was 0.840, 0.904, and 0.944, respectively. SEP was 0.066, 1.868, and 0.601, respectively. After outlier treatment, $r^2$ was 0.892, 0.925, and 0.971, while SEP was 0.052, 1.577, and 0.394, respectively, which totally showed a high correlation. However, $r^2$ of starch was 0.464, which appeared a low correlation. Thereof, the verified equation appearing higher $r^2$ of nitrogen, moisture, and carbohydrate showed its higher accuracy of prediction model, which finally could be put into practical use for turf management system. Near Infrared Reflectance Spectroscopy(NIRS)는 짧은 시간 안에 식물의 다양한 영양소를 동시에 정확하고 빠르게 측정할 수 있다. 본 연구는 creeping bentgrass 'CY2' 엽의 여러 가지 기본 요소의 값을 예측하기 위해서 NIRS(근적의선 분광분석기)를 사용하여 측정하였다. 그 결과, 질소와 수분 그리고 탄수화물의 $r^2$은 각각 0.892, 0.925, 0.971이었다. 검량식에 대한 검증에서 $r^2$이 높은 상관관계를 나타냈으므로, 잔디에서 더 많은 연구를 위한 실용화 가능성을 확인 할 수 있었다.

대학테니스 전공수업의 재미 저해, 촉진요인의 분석

차정훈,권중호 한국스포츠리서치 2007 한국 스포츠 리서치 Vol.18 No.6

기업 정보화 역량 관점의 정보화 수준 평가체계에 관한 연구

차정훈,이병율,신선도,임춘성 한국경영과학회 2008 한국경영과학회 학술대회논문집 Vol.- No.-

An informatization is recognized as core factors to reinforce business competitiveness such as formation of a new business relation, prior occupation of the strategic superiority and being a step ahead from the purpose to improve only the whole efficiency of enterprise. But existed evaluation framework has focused on the visible aspect of all the conditions to create the input and output. In previous studies, it's hard to know that how IT affect business value creation. Therefore, this study presents the evaluation of IT structure and IT competency as drivers and inhibitors of informatization and suggests new IT evaluation framework which can estimate IT competency. The new IT Evaluation Framework was verified through survey with experts.

체육수업에서 아동의 집단적·협력적 활동평가를 위한 형성적 평가표 작성방법에 관한 연구

차정훈,안길영,배귀영 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

A new formative evaluation instrument focusing on students' interactive and cooperative behaviors in physical education class was developed, Three hundred and sixty-four Japanese elementary students in the sixth grade participating in 12 PE classes answered to questionnaire consisting of 3D items with 3-point intensity scale. Item analysis canceled 9 items and factor analysis of 21 items based on promax rotation revealed 5 factors, which were named Cooperative achievement, Cooperative thinking, Positive interaction with teammates, Human relations hip in the group, and Motive for cooperative activities. This scale was condensed into 10 items typical of each factor by an applicable selection and had similar factorial simple with consistent reliability (alpha=.75). We could confirm that the average score of this scale had increased through out a "Karada-Hogushi no Undo" unit including six sessions in the sixth grade's PE class (Repeated Measures ANOVA; p<.05) and agreed with "task appropriateness" for students. This scale may be viewed as an useful instrument for assessment and improvement of PE class intending students to interact with one another.

2016년도 테니스 그랜드슬램 경기분석

차정훈,권중호 한국스포츠학회 2017 한국스포츠학회지 Vol.15 No.4

본 연구는 테니스 그랜드슬램대회별 남녀 각각 7경기에 대한 경기내용 측정항목에 대한 차이와 남녀선수의 랭킹과 경기내용 측정항목간의 관계를 확인함으로써 국내선수들과 현장지도자들에게 제공함으로써 지도와 훈련에 밑거름이 되는데 그 목적이 있다. 2016년 테니스 그랜드슬램 대회 전호, 전불, 전영, 전미오픈의 남녀단식 8강부터 결승전까지 총 112 경기(남자 56, 여자 56)내용의 결과자료를 이용하였다. 그 결과, Aces, Double faults, Unforced Errors, Winning on 1st Serve, Winning on 2nd Serve, Winners (Including Service), Receiving Points Won(%), Total Point Won, Fastest Serve(KMH), Average 1st Serve Speed(KMH), Average 2nd Serve Speed(KMH)가 남녀선수에 따라 차이가 있었고, 남자선수의 경우, 랭킹과 Winning % on 2nd Serve, Receiving Points Won(%), Net Approaches(%)는 유의한 부적상관을 보였고, 여자선수의 경우, 랭킹과 Aces, Winning % on 1st Serve, Winners (Including Service)는 부적상관을 보였다. The purpose of The purpose of this research is to supply tennis coaches and athletes with research data from international competitions that can be used to teach and aid in the development of training. The object of this research was to analyze the final seven games of each of the four Grand Slam tennis competitions; Australia, Roland Garros, Wimbledon, and the U.S. Open. These were for the men's and women's singles matches starting from the quarter finals through to the finals. We used the statistics program SPSS(Statistics package for the Social Science)WIN Korean version 22.0 for this research. Independent t-test is operated to know the concluding difference between the men and women in performance to significant difference of .05 in the Grand Slam competitions. Spearman's ρ correlation analysis was used to analyze the sample ranking and performance correlation. Therefore, we obtained the following conclusion. First, There were differences performance as related to Aces, Double faults, Unforced Errors, Winning on 1st Serve, Winning on 2nd Serve, Winners (Including Service), Receiving Points Won(%), Total Point Won, Fastest Serve(KMH), Average 1st Serve Speed(KMH), Average 2nd Serve Speed(KMH). There was no difference relating to 1st serve(%) in, Break Point Conversions(%), Net Approaches(%). Second, In regards to male athletes' ranking and performance, there was a direct correlation with Winning % on 2nd Serve, Receiving Points Won(%), Net Approaches(%). In regards to females' ranking and performance, there was a direct correlation with Aces, Winning % on 1st Serve, Winners (Including Service).

동호인테니스대회 스폰서십에 따른 브랜드지식과 재구매의도의 관계

차정훈,강혜연 한국디지털정책학회 2017 디지털융복합연구 Vol.15 No.5

학제간 융합연구를 위한 테니스 백핸드 스트로크 동작의 운동역학적 비교 분석

차정훈 한국디지털정책학회 2015 디지털융복합연구 Vol.13 No.7