• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2002.11a
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• pp.461-467
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• 2002

Signals reduced from the brain had been considered as a noise that is caused by the stochastic process until 1980. The recent non-linear dynamic theory researches, however, reported that these signals are meaningful and deterministic chaos signals in which they show how the brain deals with various information Since this report, a wide range of researches has been carried out and still in progress. Thus, by using the correlational dimension, one of the non-linear analytical methods, the characteristics of the brain signals can be analyzed. In this thesis, the scent of lavender, which stimulates the olfactory sense, is introduced to measure EEG with the International 10-20 electrode system on 16 channels, and to analyze the interrelationship between the original signals before the stimulation and the changed signals after the stimulation. Finally, the effect of the scent stimulation to the brain is analyzed. The purpose of this thesis is to apply these analyzed results to the computerized mapping of the brain signals and possible ways of specifying the source of the brain signals through various medical applications.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2002.11a
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• pp.461-467
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• 2002

Signals produced from the brain had been considered as a noise that is caused by the stochastic process until 1980. The recent non-linear dynamic theory researches, however, reported that these signals are meaningful and deterministic chaos signals in which they show how the brain deals with various information Since this report a wide range of researches has been carried out and still in progress. Thus, by using the correlational dimension, one of the non-linear analytical methods, the characteristics of the brain signals can be analyzed. In this thesis, the scent of lavender, which stimulates the olfactory sense, is introduced to measure EEG with the International 10-20 electrode system on 16 channels, and to analyze the interrelationship between the original signals before the stimulation and the changed signals after the stimulation. Finally, the effect of the scent stimulation to the brain is analyzed. The purpose of this thesis is to apply these analyzed results to the computerized mapping of the brain signals and possible ways of specifying the source of the brain signals through various medical applications.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.2717-2726
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• 2013

This study was conducted in order to analyze the theories behind external protective factors. In particular, it sought to understand the influence of adolescent resilience on learning motivation. Students of a public high school located in Gyeonggi Province participated in various questionnaires during the week of March 5th, 2013. Frequency analysis, one-way ANOVA (analysis of variance), correlation analysis, and multiple regression analysis were utilized to analyze the acquired data. The results revealed that when family relationships were strong and local community expectations were high, the students' 'attention to implementation processes,' one aspect of intrinsic motivation to learn, was also high. 'Suitable levels of adventurousness and risk-taking,' another aspect of intrinsic motivation to learn, was high when school expectations were also high and when relationships at the school level were weaker. The study results verified that the theory that intrinsic motivation to learn can be enhanced by strengthening external factors to protect adolescent resilience. This study is significant in that it establishes theoretical grounds to address adolescent issues, to develop programs to prevent school dropouts, and to apply the results to future legislative policies.

• Journal of the Korea Society for Simulation
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• v.18 no.4
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• pp.21-28
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• 2009

In the past, most of battle occurred in flatland and simple military force size gave a big influence in combat result. However, after the World War I, most of battles took place at the various terrain features such as forest, downtown, jungle and many others. Therefore, terrain factor exerts big influence on battle with weapon system in the ground warfare. However, effect of terrain has been explained only by quantitative manner in the battle. Furthermore, combat simulation and modeling applied a method that lower the combat capability of battle factors. In this paper, we present instrumentation that evaluate impact of terrain using fractal dimension. We determine the fractal dimension value by the "box counting dDimension" and density to calculate impact of terrain. Furthermore, we analyzed correlation with fractal dimension and density for battle result that obtained from the EINSTein model which is an agent-based simulation. We compare with 'Stalingrad battle' result out of battle example and analyzed. This study presented a method combat effectiveness that effect of terrain calculate quantitatively using fractal dimension.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.6
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• pp.48-54
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• 2019

This study was based on Job Demand-Resource Model and tried to understand the causes of presenteeism that work but have decreased productivity in spite of health problems. In order to examine the psychological causes of presenteeism, we reinterpreted job resources as psychological capital, which is a psychological resource of personal dimension, and examined the positive and negative aspects of job demands by classifying job demands into challenge and hindrance stressors. Data analysis was conducted using SPSS 21.0 and AMOS 20.0 statistical programs. Data were gathered from 329 employee in Korea. The results of this study are as follows: Hindrance and challenge stressor and psychological capital were fully mediated in the influence of presenteeism through job engagement, and hindrance stressor and psychological capital were fully mediated in the influence of presenteeism though job burnout. Based on the results.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10c
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• pp.510-515
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• 2007

2차원 영상으로부터 3차원 정보를 획득하기 위해서는 disparity map의 정확한 계산이 요구된다. Disparity map을 구하기 위한 기존의 알고리즘은 크게 상관도 기반 방법과 특징 기반 방법으로 분류되는데, 본 논문에서는 이들 각 방법에 대한 분석을 통해서 좀 더 정확한 disparity map을 구하는 방법을 모색한다. 이를 위해 스테레오 카메라로부터 획득된 2차원 영상에서 건물에 대한 깊이 정보 추출을 위해 SIFT 기법을 이용한 disparity map 생성 알고리즘을 제안한다. 제안된 기법은 수정된 MAD인 MMAD(Modified Mean of Absolute Differences) 알고리즘을 새로 제안하여 영역 기반의 유사도 측정을 기반으로 하면서 특징 기반 방법의 하나인 SIFT를 적용하여 거짓 정합(false matching)에 의한 에러를 줄이고 폐색(occlusion) 영역에 대한 오류를 보정한 disparity map을 생성하는데 초점을 둔다.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 1999.03a
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• pp.17-23
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• 1999

본 논문에서는 절리면 거칠기를 정밀하게 수치화 하기 위해 레이저 변위계를 이용한 3차원 거칠기 측정기를 구동시키는 프로그램 제작 및 여러 가지 상태의 절리면에 대해 수치화를 실시하여 각종 거칠기 파라미터를 결정한 후 오차분석을 실시하여 이 기계를 이용한 측정의 타당성을 검증하였다. 동일한 절리면에 대해 물리적인 접촉에 의한 3차원 거칠기 측정기로부터 얻어진 거칠기 파라미터와 레이저 변위계를 이용한 측정기로부터 얻어진 것들 사이의 관계를 살펴보았고, 레이저 측정기에 의해 수치화된 절리면 거칠기 파라미터 사이의 상관관계를 조사하였다. 연구에 사용한 시료는 황등화강암, 여산대리석의 2종류이며, 절리형상 측정을 위한 절리는 인장균열 발생장치를 이용하여 인공적으로 제작하였다. (중략)

• Journal of the Korean Society for information Management
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• v.30 no.2
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• pp.7-33
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• 2013

The purpose of this study is to analyze the user satisfaction, royalty and compliant of a children's library Website. To achieve the aim of this study a modified Kim and Park's model of the user satisfaction index which consists of information quality, service quality, and system quality dimension is adopted. A total of 130 valid responses to the questionnaire were analysed using SPSS 18. It is found that the higher the user satisfaction gives the higher the royalty and the lower the compliant. For the contents quality dimension, the items of Usability, Accuracy, Easy of understand, Reliability and Up-to-date; for the service quality dimension, the items of Interface design, Reliability, Responsiveness, and Empathy; for the system quality dimension, the items of Response time, Interactive, Easy to access, and Easy to use show a significant relationships to the users' satisfaction.

• Journal of Gifted/Talented Education
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• v.23 no.3
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• pp.407-419
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• 2013

In current knowledge-based society, development and growth of IT-related industry is essential for a nation's competitiveness since it's economic power depends on IT industry in many countries. A success of IT industry depends on a few IT geniuses like Steve Jobs and Bill Gates. Thus, it is necessary to identify and foster gifted children in IT as early as possible. The purpose of this paper is to identify the correlation of academic performance per subject for the gifted children in IT. The analysis is focused on three subjects, that is, Information, Science, and Mathematics, respectively. For this purpose, the gifted children are selected and analyzed in a gifted science education center attached in a university at Seoul Metropolitan Area. The analysis results show that there is meaningful correlation among three subjects. That is, if high scores in a subject means high scores in other subjects. For instance, a gifted child with high scores in Information got high scores in Science and Mathematics. The result will be useful to improve selection examinations and curriculum for gifted education in IT, for inclusive education and convergent education.

• The Korean Journal of Applied Statistics
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• v.28 no.3
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• pp.385-392
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• 2015

Principal component analysis (PCA), a dimension-reduction technique, is usually implemented after the variables are standardized when the measurement unit of variables are different. To standardize a variable we divide it by its standard deviation. But there is another way to transform a variable to be independent of its measurement unit. It is to divide it by its mean rather than standard deviation. Implementing PCA on standardized variables is equivalent to implementing PCA with a correlation matrix of original variables. Similarly, implementing PCA on the transformed variables divided by their means is equivalent to implementing PCA with a matrix related to the coefficients of variation of the original variables. We explain why we need to implement PCA on the variables transformed by their means.