• 대한한의학방제학회지
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• 제16권1호
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• pp.169-183
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• 2008

In this study, we measured body mass index, visceral fat ratio and 6 parts of body, neck circumference, circumference of upper arm, chest circumference, abdomen circumference, hip circumference, and thigh circumference by bioimpedence analysis system, after taking Gyeongshingangjeehwan16 (GGEx16) in five months except the first period before taking GGEx16 on 49 women who are obesity or high-level obesity. In order to examine the significance test for the effect of obesity improvement of GGEx16, we practices repeated measure ANOVA with values of measurement variables in 6 monthly times. As a result of all measurement variables, there were significant difference (P-value=0.001). Therefore, we can say that GGEx16 is effective about obesity improvement. As it dramatically decreased between second measure period and first measure period for all measure variables, we can see that there were the most effect of GGEx16 in the first time after taking GGEx16. It is known that a important measurement variable to have a effect for obesity improvement about two variable which are body mass index and visceral fat ratio is waist circumference through correlation analysis. The result of whether there are differences to effect of obesity improvement for GGEx16 around the climacteric, there were significant difference for the effect of obesity improvement for GGEx16 around the climacteric about all parts of body (P-value=0.001). There were also powerfully difference in effect of obesity improvement for GGEx16 around the climacteric about all parts of body (P-value=0.001). Especially, the climacteric before is more effective than the climacteric after in the aspect of the effect of GGEx16.

• 한국도서관정보학회지
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• 제42권1호
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• pp.183-203
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• 2011

이 연구는 사서교사의 교육실습에 영향을 미치는 변수 간의 인과관계를 분석하여 효과적인 교육실습의 전개방향을 모색하고, 사서교사의 전문성 선장방법으로써 교육실습의 효과를 규명하기 위한 목적으로 수행되었다. 이를 위해 두개의 연구모형을 구성하였다. 첫 번째 모형에서는 교육실습의 영향요인으로 사전교육, 실습프로그램, 지도교사, 실습환경, 실습기관의 조직적 분위기를 선정하여 변수 간의 인과관계를 분석하였고, 두 번째 모형에서는 사서교사의 주요 전문성 신장경로인 대학교육과정, 교육실습, 현장경험 및 자기계발이 역할인식과 직무수행 역량에 어느 정도의 효과를 미치는지 분석하였다. 연구결과 사서교사의 교육실습에 가장 큰 영향을 미치는 변수는 실습프로그램으로 나타났고, 전문성 선장경로 중 교육실습은 직무수행 역량에 긍정적인 영향을 미치는 것으로 나타났다. 이상의 분석결과를 바탕으로 교육실습은 사서 교사의 전문성 신장과정으로써 실제적인 효과가 있으며, 교육실습의 효과적 전개방안으로 교육실습에 대한 인식제고, 양질의 실습프로그램 개발, 충분한 사전준비, 지도교사의 노력이 필요하다는 점을 제안하였다.

• 한국정보시스템학회지:정보시스템연구
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• 제11권1호
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• pp.51-74
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• 2002

The purpose of this study is to empirically investigate critical success factors for effective implementation of web-based distance learning system. First of all, four critical success factors are theoretically derived from reviewing previous research. They are: (1) learner-related factor including the variables such as teaming ability, learning attitude, and attending motivation, (2) environmental factor including the variables of physical and mental support for learners, (3) instructional design factor represented by one variable, the degree of appropriateness of learning contents, and (4) the factor concerning the level of self-directed learning readiness embracing the variables such as curiosity for learning, openness towards challenge of learning and affection for learning. Subsequently, the relationships between these four critical success factors and the degree of learning satisfaction are empirically investigated. The data for empirical analysis of the research are collected from 1,020 respondents who have already passed the web-based distance learning courses which have been implemented in Information and Communication Officials Training Institute. Out of 1,020 responded questionnaires, 875 data were available for statistical analyses. The main results of this study are as follows. Firstly, the most important factor for successful implementation of the web-based distance learning system is shown to be the instructional design factor, and in the next place, the self-directed learning readiness factor, the environmental factor and the learner-related one in sequence. Secondly, additional analysis of the variables included in the instructional design factor shows that availability of practical information and knowledge is the most influencing variable, and next, interesting composition of contents, reasonable learning amount, optimal level of instruction, and understandable explanation are significantly important in the descending order. Lastly, among learning motivators, strong intention of acquiring business knowledges and skills is found to be the most important satisfier in the web-based distance learning. The theoretical contribution of this study is to derive a comprehensive model of critical success factors for implementing the web-based distance learning system. And, the practical implication of this study is to propose efficient and effective guidelines for developing and operating the web-based distance learning system in the various kinds of organizations.

• 한국도서관정보학회지
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• 제42권2호
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• pp.323-341
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• 2011

본 연구에서는 국내 공공도서관의 이용가치에 영향을 미치는 요인을 분석하였다. 이용자의 진술을 통해 가치가 도출되는 CVM을 이용한 측정에서 응답자의 특성, 도서관의 특성과 같은 다양한 변인들이 미치는 영향들을 파악하고자 하였다. 이를 위해 국내외 공공도서관의 가치측정 연구에서 밝혀진 영향변인들을 분석하였고 여기서 나타난 영향요인들의 특성을 파악하였다. 도서관의 가치를 나타내는 지불의사액에 많은 영향을 미치는 요인은 이용자의 성별, 수입, 연령, 수입과 같은 인구통계학적 특성과 이용빈도, 방문소요시간과 같은 이용형태이다. 만족도와 인식 영역에서는 정보, 시설, 프로그램의 세가지 서비스 유형에 따라 사서의 만족도, 주민교류의 장, 경제적 도움 정도, 문화예술지원자에 대한 인식이 영향을 미치고 있었다. 이 연구는 국내 모든 유형의 공공도서관을 대상으로 측정한 가치에 미치는 영향력을 포괄적으로 분석함으로써 지역과 규모별로 이용자가 평가하는 가치의 속성에 대한 정보를 제공하였다. 이러한 정보는 향후 도서관의 가치를 높이기 위한 전략적인 정책수립에 도움이 될 것으로 기대된다.

• Journal of the Korean Data and Information Science Society
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• 제19권2호
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• pp.463-473
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• 2008

In this study, we measure damage depth and calculate effective impact speed in case of rear-end collision using real car insurance data. We study the relationship between demage depth and effective impact speed, and present statistical model for these two variables. In our real data study, 3-degree polynomial equation model is better fit to effective impact speed and demage depth than the simple linear model that are estimated in previous other studies. Damage depth is a major factor to see the extent of impact in a car collision, and by using this equation, it is possible to evaluate the severity of driver's injury.

• 한국조경학회지
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• 제23권4호
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• pp.50-60
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• 1996

The purpose of this study is to investigate the prime factors that affect user satisfaction of area and facilities in urban forests, to classify those factors, to find out factorial structure of user satisfaction about them, and then to suggest important indicators in the urban forest planning, design, and development. The survey research was done using the self-administered questionnaire method by the people in the city of the Pusan who participated in recreational activities in the Mt. Keumjung. Factor analysis was used to extract the prime factors related to the recreational satisfaction concerning the area and facilities of the urban forest by the SPSS program, and then prime factors were used to investigate the factorial structure of user recreational satisfaction in the urban forest by the LInear Structure RELation program. According to the factor analysis concerning the 13 variables, 4 prime factors by the statistical values were considered as effective, indicating, 'health and recreational facilities', 'convenience and management facilities','facilities for the physical and psychological training' and 'historical and cultural areas'. The results of the causal structure analysis were identified as having significant effects mutually on endogenous variables, 'overall recreational satisfaction of the areas and facilities in the Mt. Keumjung','health and recreational facilities','convenience and management facilities','facilities for the psychological training', and 'historical and cultural areas'. But exogenous variables which have significant effects on endogenous variables were also indentified. Overall fits of both causal model were very good. The hypothetical causal structural equation models based on the results found partially significant correlation between dndogenous variables and between envogenous and exogenous variables. These significant relationships indiate important factors and variables that should be considered in planning, design, and development of the urban forests. Therefore, development direction of the Mt. Keumjung has to be analyzed as significant factors concerning user recreational satisfaction in a systematic was, recognized as important variables for planning process. The plan for development and management also should reflect the natural conservation policy from the environmental conservation movement like natural conservation advertisement and environmental education.

• 산업경영시스템학회지
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• 제39권1호
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• pp.123-129
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• 2016

In the manufacturing industry fields, thousands of quality characteristics are measured in a day because the systems of process have been automated through the development of computer and improvement of techniques. Also, the process has been monitored in database in real time. Particularly, the data in the design step of the process have contributed to the product that customers have required through getting useful information from the data and reflecting them to the design of product. In this study, first, characteristics and variables affecting to them in the data of the design step of the process were analyzed by decision tree to find out the relation between explanatory and target variables. Second, the tolerance of continuous variables influencing on the target variable primarily was shown by the application of algorithm of decision tree, C4.5. Finally, the target variable, loss, was calculated by a loss function of Taguchi and analyzed. In this paper, the general method that the value of continuous explanatory variables has been used intactly not to be transformed to the discrete value and new method that the value of continuous explanatory variables was divided into 3 categories were compared. As a result, first, the tolerance obtained from the new method was more effective in decreasing the target variable, loss, than general method. In addition, the tolerance levels for the continuous explanatory variables to be chosen of the major variables were calculated. In further research, a systematic method using decision tree of data mining needs to be developed in order to categorize continuous variables under various scenarios of loss function.

• 스마트미디어저널
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• 제9권4호
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• pp.26-35
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• 2020

미래의 주가를 예측하기 위한 시도는 과거부터 꾸준히 연구되어왔다. 그러나 일반적인 시계열 데이터와 달리 금융 시계열 비정상성(non-stationarity)과 장기 의존성(long-term dependency), 비선형성(non-linearity) 등 예측을 하는 것에 있어서 여러 가지 방해 요인이 존재한다. 또한, 광범위한 데이터의 변수는 기존에 사람이 직접 선택하는 것에 한계가 있으며 모델이 변수를 자동으로 잘 추출할 수 있도록 하여야 한다. 본 논문에서는 비정상성 데이터를 정규화할 수 있는 슬라이딩 타임스텝 정규화(sliding time step normalization) 방법과 LSTM 형태의 오토인코더(AutoEncoder)를 사용하여 모든 변수로부터 압축된 변수로 미래 주가를 예측하는 방법, 기간을 나누어 전이 학습을 하는 이동 전이 학습(moving transfer learning)을 제안한다. 또한, 실험을 통하여 100개의 주요 금융 변수들만을 사용하는 것보다 뉴럴 네트워크를 통해서 가능한 많은 변수를 사용하였을 때 성능이 우수함을 보이며, 슬라이딩 타임스텝 정규화 방법을 사용하여 모든 구간에서 데이터의 비정상성에 대해 정규화를 수행함으로써 성능 향상에 효과적임을 보인다. 이동 전이 학습 방법은 스텝 별 테스트 구간에서 모델의 성능을 평가하고 전이학습을 함으로써 긴 테스트 구간에서 성능 향상에 효과적임을 보인다.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.731-740
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• 2021

This research aims to investigate the determinants of real effective exchange rate in emerging ASEAN countries, including Indonesia, Malaysia, Philippines, Thailand, and Vietnam. The research was conducted by using quarterly time series data set from 1980Q1 to 2020Q3. Cointegration and the error correction model (ECM) methods were applied to test the long run and short run relationship of the real effective exchange rate and its determinants. The results indicate that the ratio of foreign direct investment to GDP and the government spending have significantly positive impact on real effective exchange rate in the Emerging ASEAN countries. The trade opening had influencing real effective exchange rate in most the Emerging ASEAN countries, except Vietnam. In addition, the international reserve (INR) had significant long-run impacts variables on real effective exchange rate in Malaysia, Thailand and Vietnam. In the short run equilibrium, the error collection term suggest that Indonesia and Malaysia are the fastest speed adjustment to equilibrium. In addition, the term of trade influence the real effective exchange rate in Indonesia, Malaysia, and the Philippines but it is not in Thailand and Vietnam. However, FDI is a major factor of the real effective exchange rate in Vietnam, but not for other countries.

• 응용통계연구
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• 제22권1호
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• pp.171-179
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• 2009

본 논문에서는 정규확률변수의 곱과 그의 합으로 표현되는 통계량의 분포에 대한 효과적인 근사법을 다루었다. 이차 형식에 대한 안장점근사에 기초한 이 방법은 기존의 정규근사에 비해 매우 정확한 결과를 제공한다. 또한 이에 대한 응용으로 FSK 통신에서 발생하는 문제를 제시하고, 그 해결책으로 본 논문에서 제안한 안장점근사법을 사용하였다. 모의실험을 통해 제안된 근사법이 중심영역은 물론, 통신이론에서 주요 관심 영역인, 극단 꼬리부분의 확률 근사에도 매우 유용한 방법임을 확인하였다.