대응표본에서 AUC차이에 대한 신뢰구간 추정에 관한 고찰

김희영,Kim, Hee-Young 한국통계학회 2010 Communications for statistical applications and me Vol.17 No.2

Receiver operating characteristic(ROC) curves can be used to assess the accuracy of tests measured on ordinal or continuous scales. The most commonly used measure for the overall diagnostic accuracy of diagnostic tests is the area under the ROC curve(AUC). When two ROC curves are constructed based on two tests performed on the same individuals, statistical analysis on differences between AUCs must take into account the correlated nature of the data. This article focuses on confidence interval estimation of the difference between paired AUCs. We compare nonparametric, maximum likelihood, bootstrap and generalized pivotal quantity methods, and conduct a monte carlo simulation to investigate the probability coverage and expected length of the four methods.

가미십전탕(加味十全湯) 가미방(加味方)이 화상(火傷)의 조직 손상에 미치는 영향

김희영,홍승욱,Kim, Hee-Young,Hong, Seung-Ug 대한한방안이비인후피부과학회 2009 한방안이비인후피부과학회지 Vol.22 No.1

Objective : The purpose of this study is to examine the effects of Gamisipjeontang-gamibang(GT) on an experimental bum elicitation. Method : The absorbance of the photo cell mixed with GT at the Abs 560 nm was measured after irradiation for 1 min. In order to know the antioxidant effect on skin cell of mice after burn elicitation, superoxide dismutase(SOD) activity was measured. Also, in order to know effects on the skin regeneration in the burned mice, we counted the eosinophil in blood from animals via cardiac puncture and observed the histological structure in the epidermal basal layer and the dermal section on the 3rd, 7th and 14th day after burn elicitation. We also studied changes in angiogenesis in the capillary surrounding the basal layer and dermal papilla. The changes of HSP70 distribution and changes of p53 positive reaction were observed to investigate the changes of the stress in the skin as well. Result : The results indicated that GT has a significant impact on the antioxidant effect on skin cells of mice after bum elicitation by increasing SOD activity in vitro test. GT seems to decrease MIP-2 which induces neutrophil infiltration and promotes the angiogenesis dose-dependently. Furthermore, GT decreased HSP70, the expression of which was induced by elevated temperatures, and p53 which induce a apoptosis after stress. Conclusion : GT can be applied to burned skin through its antioxidant effect and skin regeneration property.

4차 산업혁명시대의 기독교의 역할과 교육방향에 관한 연구

김희영,Kim, Hee Young 한국기독교교육학회 2021 기독교교육논총 Vol.- No.67

Since Schwab mentioned the Fourth Industrial Revolution at the World Economic Forum Annual Meeting 2016, discussions have been ongoing about it and the future society. The Fourth Industrial Revolution exceeds the development of technology and influences society, culture, and lifestyle. Moreover, in the face of the COVID-19 crisis, society continues to experience and realize the era of the Fourth Industrial Revolution. Although we hope that this era will surely improve human life, we are also concerned about human alienation and social and economic polarization that may emerge as a consequence. How, then, does Christianity contribute to the public space and set the direction for education in this day and age? This study focused on the role of Christianity and the direction of education during the Fourth Industrial Revolution. First, I examine problems in terms of the inner and outer aspects of individuals and communities that may occur during the Fourth Industrial Revolution through the perspectives of Mitchell, a psychologist, Bellah, a sociologist, McGrath, a theologian, and Bostrom, a philosopher. Through their theories, we can view the lives of individuals in the real, virtual, and transcendental worlds of this era. I find that Christianity can provide a transcendent norm in this world, give meaning to life, and change people and the world. Therefore, I suggest the creation and expression of symbols as a direction for education. For this form of education, I recommend five steps, namely, observing, entering, discovering, participating, and making symbols. In this manner, people can represent the kingdom of God in the real world.

붓스트랩 방법을 이용한 일반화 자기회귀 조건부 이분산모형에서의 조건부 분산 예측

김희영,박만식,Kim, Hee-Young,Park, Man-Sik 한국통계학회 2009 Communications for statistical applications and me Vol.16 No.2

In terms of generalized autoregressive conditional heteroscedastic(GARCH) model, estimation of prediction interval based on likelihood is quite sensitive to distribution of error. Moveover, it is not an easy job to construct prediction interval for conditional variance. Recent studies show that the bootstrap method can be one of the alternatives for solving the problems. In this paper, we introduced the bootstrap approach proposed by Pascual et al. (2006). We employed it to Korean stock price data set.

미래지상전투차량의 효과적 획득을 위한 초기설계기법에 관한 연구

김희영,권승만,이규노,Kim, Hee-young,Kwon, Seung Man,Lee, Kyu Noh 한국시뮬레이션학회 2017 한국시뮬레이션학회 논문지 Vol.26 No.2

In the acquisition program, the conceptual design is the most important step toward specifying the military objectives, establishing requirements and determining future developmental directions, of a target system. However, if both the requirements and directions are incorrectly set due to the lack of development experiences and literature backgrounds in the target systems, such as future ground combat vehicles, it may become a major risk in the future design phases and the entire acquisition program. In order to correct these errors in the future phases, time, effort and cost are required. Therefore, it is necessary to reduce the errors that occur in the initial stages to effectively acquire the future ground combat vehicles. This paper describes the initial design method for verifying the requirements and the developmental directions and estimating the system performance at the conceptual design through the system-level physical modeling and simulation (M&S) and the target system performance analysis. The system-level physical M&S use cutting-edge design tools, model-based designs and geometric-based designs. The system performance estimation is driven from the results of the system-level physical M&S and the specialized system analysis software.

타이트 스커트 실루엣 및 길이에 따른 동작적합성과 트임길이에 관한 연구

김희영,최혜선 ( Hee Young Kim,Hae Sun Choi ) 한국의류학회 1993 한국의류학회지 Vol.17 No.4

The purpose of this study was to find out the moving fitness and slit length of tight skirt in relation to its length & silhouette. Five kinds of length, micro mini, mini, natural line, medi and maxi, and two kinds of silhuette, slim & straight-a total of ten tight skirts-were investigated. Ten college students were chosen for this experiment. The moving fitness was tested by measuring the step length, step width and step angle in the case of walking on the flat and going up the stairway & bus stair. The slit length was tested by measuring the back slit length needed in the case of going up stairway & bus stair. Data were analyzed with use of SAS pakage. The statistics were based on average, standard diviation, two-way ANOVA, Pearson`s correlation and multiple regression analysis. The main results were as follows. 1. There was significant difference in the moving fitness according to length & silhouette of tight skirt. The moving fitness of slim type was lower than that of straight type and the longer the skirt length was, the lower the moving fitness was. The significance appeared particularly in the case of going up the bus stair. 2. There was significant difference in the skirt length obove slit accorting to length & silhouette of tight skirt. The skirt length obove slit of slim type was shorter than that of straight type. The longer skirt length was, the longer it was from micro mini to natural line, that of medi skirt was shorter or a little longer than that of natural line skirt and there was little change from medi skirt to maxi skirt.

시판 타이트 스커트의 구성실태 분석

김희영,최혜선 ( Hee Young Kim,Hae Sun Choi ) 대한가정학회 1993 Human Ecology Research(HER) Vol.31 No.3

5, 6세 유아의 자기조절학습능력과 과학적 탐구기술이해 간의 관련성 연구

김희영 ( Hee Young Kim ),김경숙 ( Kyung Sook Kim ) 한국아동교육학회 2015 아동교육 Vol.24 No.1

The study investigated relationships between young children``s self-regulated learning competence and understanding of scientific inquiry skills. The subjects were 178 young children at age 5 and 6 years. To measure children``s self-regulated learning competence, Korean version of ‘Checklist of Independent Learning Development 3-5’ developed by Whitebread et al. (2009) were rated by the teachers of young children. Young children’s understanding of scientific inquiry skills were assessed through Korean version of The Science Learning Assessment developed by Samarapungavan et al. (2009). The study results were as follows. First, young children at age six showed higher competence in self-regulated learning and understanding of scientific inquiry skills the children at age 5. Second, significant correlations were found between self-regulated learning competence and understanding of scientific inquiry skills. Third, young children``s age and understanding of science inquiry skills were variables significantly predicting their self-regulated learning competence.

협동적 음악활동이 유아의 음악적 창의성 및 학습관련 사회적 기술에 미치는 효과

김희영 ( Kim Hee Young ),홍지명 ( Hong Ji Myeong ) 인문사회 21 2017 인문사회 21 Vol.8 No.2

This study was to examine the effects of cooperative music activity on young children`s musical creativity and learning-related social skills. The subjects were 40 five-year-old young children in the B pre-school located in M city. The experimental group carried out the cooperative music activity. The results of this study were as follows: First, experimental group showed higher musical creativity than control group. Second, experimental group showed higher learning-related social skills than control group. Consequently, the cooperative music activity promoted young children`s musical creativity and learning-related social skills. Moreover, the results of this study suggest that the cooperative music activity is worth utilizing as a proper and meaningful method to improve young children`s musical creativity and learning-related social skills.

유아의 외모에 대한 사회문화적 태도, 신체존중감, 또래 수용성, 사회적 능력간의 관계

김희영 ( Hee Young Kim ),김유환 ( Yu Hwan Kim ),김경숙 ( Kyung Sook Kim ) 한국유아교육학회 2012 유아교육연구 Vol.32 No.4

The study investigated relationships among young children`s socio-cultural attitudes toward appearance, body esteem, peer acceptance, and social competence. Interviews were conducted on 294 young children at age 5 years and surveys were administered to their teachers at 10 child care centers in G city and J province. The collected data were analysed using SPSS 12.0. The results of study were as follows: First, boys perceived appearance as more prevailing value than girls. However, there were no differences between boys and girls in their body esteem, peer acceptance, and social competence. Second, socio-cultural attitudes toward appearance, body esteem, peer acceptance, and social competence were inter-correlated among both boys and girls. Third, body esteem and socio-cultural attitudes toward appearance were factors that significantly predicted young children`s peer acceptance while body esteem was a factor that significantly predicted their social competence.