• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1750-1751
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• 2007

이동하고자 하는 경로에 자석 마커를 설치하고 마커의 자계를 인식하여 경로를 추종하는 이동 로봇의 경로 제어시스템이다. 자석마커 간격 확장과 여러 환경에 따른 자계를 분석하기 위해 자동 자계 측정 장치를 제작하였고, 이를 이용한 실측을 통하여 지자기 제거를 확인하였다. 지자기가 제거된 마커 자기장 값의 정규화와 선형화를 통하여 이동 경로 상에서 위치 인식이 수월하도록 하였으며, 인식된 경로 정보로 이동 로봇의 경로 제어가 가능하도록 하였다.

• Journal of Biomedical Engineering Research
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• v.21 no.2
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• pp.145-156
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• 2000

본 논문에서는 중앙시상 두뇌 자기공명영상 분할결과를 이용한 3차원 시상 두뇌 자기공명영상의 자동분할기법을 제안한다. 제안된 알고리즘에서는 먼저 3차원 시상 두뇌 자기공명영상의 중앙영상을 분할하고, 분할된 중앙두뇌 자기공명영상을 인접하는 영상에 마스크로 적용한다. 이 때 마스크 적용으로 인하여 인접하는 영상이 절단되는 문제가 발생할 수 있다. 이러한 문제를 해결하기 위하여 절단 영역의 경계점을 검출한 후, 절단 영역에 대한 경로 재설정을 통해 절단 영역을 복원한다. 이러한 경로 재설정을 위해 connectivity-based threshold segmentation algorithm을 사용하였다. 실험결과 제안된 알고리즘의 유용성을 확인할 수 있었다.

• Proceedings of the KSMRM Conference
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• 2003.10a
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• pp.94-94
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• 2003

목적： 기능적 자기공명영상과 확산텐서영상기법을 이용하여 전음성 난청과 감각신경성 난청에서의 뇌활성화 양상 그리고 청신경경로상의 차이점을 비교 연구하고자 하였다. 대상 및 방법： 전음성 난청군 (n=4)과 감각신경성 난청군(n=5) 그리고 정상군(n=5)에서의 기능적 자기 공명영상과 확산텐서영상을 획득하였다. 기능적 자기공명영상의 경우 1.5T Siemens MR scanner에서 BOLD 기법을 이용하여 500 Hz 순음 청각자극에 대한 뇌활성화 영역을 검출하였고 영상촬영시 발생하는 기계적 소음을 차폐하기 위한 청각자극기를 특별히 제작하여 사용하였다. 뇌백질신경로를 영상화하는 확산텐서영상은 3.0T GE whole body MR scanner를 사용하였으며 미세한 확산운동을 검출하기 위해 초고속 영상기법인 EPI 기법을 사용하였다. 영상의 화질을 높이기 위해 공간적으로 25개의 다른 방향으로 확산경사자장을 가하였다. 청신경로의 비등방성 영상, 신경로 방향 영상등을 구현하기 위해 획득한 확산영상들에 대한 영상 후처리과정을 시행하였다.

• Korean Journal of Social Welfare
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• v.56 no.4
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• pp.239-268
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• 2004

This study examined the role of self-construals in marital satisfaction among men and women, and explored how independent and interdependent self-construals contribute to or undermine marital satisfaction. Data were drawn from a self-administered questionnaire study in which 489 married people(aged 25-75) residing in Seoul participated. Path analyses were conducted using Structural Equation Modeling Program, and a goodness of fit of the proposed path model was evaluated. As expected, the positive impact of independent self-construal on marital satisfaction was mediated by self-esteem and clarity of communication, and that of interdependent self-construal on marital satisfaction was mediated by psychological stability and a sense of relational well-being. The direct effects of these two types of self-construal on marital satisfaction were opposite. As predicted, independent self-construal decreased marital satisfaction, whereas interdependent self-construal increased it. All of the direct and indirect effects of independent and interdependent self-construals on marital satisfaction were statistically significant, except the indirect effect of interdependent self-construal as mediated by psychological stability. The goodness of fit indexes of the path model indicated that the model was acceptable. However, the results of separate path analyses for men and women showed that some of the effects of self-construals on marital satisfaction differed by gender. Based on these results, implications for clinical social work practice were discussed.

• Korean Journal of Culture and Social Issue
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• v.19 no.1
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• pp.45-68
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• 2013

In this study, We examined the dual path model in which entitlement rage and sexual dominance on the one of two pathway, sexual permissiveness and sexual objectification on another pathway mediated the relation between narcissism and sexual aggression. In addition, it was investigated whether alcohol use and rape myths acceptance have moderating effects in the pathways from sexual dominance and sexual objectification to sexual aggression on our path model. Data from 368 male college students in four university in Chungcheong province were analyzed using structural equation modeling. Results in structural equation modeling exhibited that narcissism affected sexual aggression through mediating effects of entitlement rage and sexual dominance, and through mediating effects of sexual permissiveness and sexual objectification. Furthermore, alcohol use and rape myths acceptance only moderated the relation between sexual dominance and sexual aggression on our model. We discussed the meaning of results and the implications for further study.

• Journal of The Korean Association of Information Education
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• v.24 no.4
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• pp.379-390
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• 2020

Recently, interest in online teaching·learning and evaluation tools has increased in the context of Covid-19. In order to use tools effectively, it is necessary to identify the structural influence and causal relationship between the learner's affective and cognitive variables. In this study, to identify a causal relationship between motivation and thinking while using online judge, research and competing model were established and model fit/path analysis were performed. It was found that there was a linear causal relationship from tool usage, self-efficacy, flow, logical thinking, to computational thinking. It was confirmed that 'self-efficacy → flow', or 'flow' had mediating effect on the path from tool usage to thinking, and tool usage was not exerted to thinking through 'flow → self-efficacy'. The causality of 'logical thinking → computational thinking' was identified on the path where tool usage affects thinking ability through learning motivation, but the causality of 'computational thinking → logical thinking' was not identified.

• Journal of dental hygiene science
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• v.9 no.1
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• pp.99-108
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• 2009

The purpose of this study was to investigate the effect of oral health education practice and schoolteacher's self-efficacy on oral health attitude. The data of 217 dental hygienists was subjected to path analysis using AMOS 16.0. Oral health knowledge, attitude, self-efficacy and oral health education practice of schoolteacher were measurement variables of three path models. The goodness of fitness of Knowledge-Attitude-Practice model and Knowledge-Attitude-Self efficacy -Practice model were acceptable. The regression weights of two models were statistically significant. Oral health education practice of schoolteacher gave impact on oral health attitude by mediation of self-efficacy of schoolteacher. Self-efficacy of schoolteacher was a important determinant of oral health education practice. Oral health attitude and practice were supposed to be mutual determinants of health behavior models.

• Proceedings of the KSEEG Conference
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• 2005.04a
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• pp.165-169
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• 2005

• Journal of the Korea Convergence Society
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• v.10 no.11
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• pp.533-541
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• 2019

This study was designed to construct and test a structural equation model for related factors that affect to self-regulated learning in nursing students. The nursing students was asked to complete a questionnaire, and 273 data units were analyzed with Structural Equation Modeling. The hypothetical model fit indices for the model revealed a fit at a recommended level, and 5 of the 6 paths were statistically significant explaining 68% of the variance. Therefore, education that improves self-determination, interpersonal competence and achievement goal orientation will promote self-regulated learning of nursing students. Competence programs to build the self-autonomy and relationships should be developed.

• Korean Journal of Psychosomatic Medicine
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• v.11 no.1
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• pp.52-59
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• 2003

Objective: The purposes of this study were to investigate anxiety and depression that can mediate stress and elicit a response from the women with urinary incontinence and compare the anxiety and depression level before and after treatment of extracoporeal magnetic innervation. Method: Fifty-five women with urinary incontinence were included from a obstetrics and gynecology cilnic. Beck Anxiety Inventory(BAI), Beck Depression Inventory(BDI), Spielberger State-Trait Anxiety Inventory(STAI) were administered before and after treatment of extracoporeal magnetic innervation. Results: The women with urinary incontinence had higher levels of anxiety and depression. Anxiety and depression were reduced after treatment of extracoporeal magnetic innervation regardless of improvement incontinence. Conclusion: Therapies including extracoporeal magnetic innervation may be intrumental in improving anxiety and depression, If the patient do not show improvements of anxiety and depression after treatment for their urologic disorder or if the therapy is unsuccessful, appropriate referral is indicated.