• Proceedings of the Korean Nuclear Society Conference
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• 1997.05a
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• pp.520-526
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• 1997

WASH-1400[1]이 발간된 이후 수행되어왔던 많은 확률론적 안전성 평가 결과를 보면 노심손상빈도를 나타내는 사고경위 중 많은 부분이 인간행위와 관련이 있는 것으로 밝혀져 확률론적 안전성 평가에서 인간행위를 다루는 것은 매우 중요하게 되었다. 그러나 인간신뢰도분석은 인간행위의 다변성(variability)으로 인해 인간행위의 모델링이 어렵고 데이타가 부족해 뚜렷한 방법론이 없어 분석시 분석자의 주관성이 개입될 여지가 있고 분석결과에는 많은 불확실성을 포함하고 있다. 노심손상빈도를 나타내는 사고경위에는 다수 인간행위가 있는 포함돼있는 단절집합을 얻게되는데 이러한 인간행위들 사이에는 기기의 공통원인 고장처럼 의존성이 존재한다. 이러한 의존성의 평가방법 또한 뚜렷하게 설정되어 있지 않은 형편이다. 이에 본 논문에서는 월성 2,3,4호기 확률론적 안전성 평가 모델에 고려되어있는 인간행위들의 인간오류 확률 값과 의존성 수준의 변화에 대한 민감도분석을 수행하였다. 분석결과 초기사건 이후의 인간행위가 노심손상빈도 변화에 크게 기여하는 것이 밝혀졌고, 다수 인간행위들 사이의 의존성 수준변화가 노심손상빈도 변화에 큰 영향을 준다는 것이 밝혀졌다.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2007.11a
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• pp.284-293
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• 2007

본 논문에서는 실시간 동정 환경에 효과적인 L-CAA 에이전트 구조를 제안한다. L-CAA 에이전트 구조는 변화하는 환경에 대한 적응성을 높이기 위해, 선행 연구를 통해 개발된 행위 기반 에이전트 구조인 CAA에 강화 학습 기능을 추가하여 확장한 것이다. 안정적인 성능을 위해 L-CAA에서 행위 선택 메커니즘은 크게 두 단계로 나뉜다. 첫 번째 단계에서는 사용자가 미리 정의한 각 행위의 수행 가능 조건과 효용성을 검사함으로써 행위 라이브러리로부터 실행할 행위들을 추출한다. 하지만 첫 번째 단계에서 다수의 행위가 추출되면, 두 번째 단계에서는 강화 학습의 도움을 받아 이들 중에서 실행할 하나의 행위를 선택한다. 즉, 강화 학습을 통해 갱신된 각 행위들의 Q 함수 값을 서로 비교함으로써, 가장 큰 기대 보상 값을 가진 행위를 선택하여 실행한다. 또한 L-CAA에서는 실행 중인 행위의 유지 가능 조건을 지속적으로 검사하여 환경의 동적 변화로 인해 일부 조건이 만족되지 않는 경우가 발생하면 현재 행위의 실행을 즉시 종료할 수 있다. 그 뿐 아니라, L-CAA는 행위 실행 중에도 효용성이 더 높은 다른 행위가 발생하면 현재의 행위를 일시 정지하였다가 복귀하는 기능도 제공한다. 본 논문에서는 L-CAA 구조의 효과를 분석하기 위해, 대표적인 동적 가상환경인 Unreal Tournament 게임에서 자율적을 동작하는 L-CAA기반의 UTBot 들을 구현하고, 이들을 이용하여 성능실험을 전개해본다.

• Korean Journal of Health Education and Promotion
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• v.27 no.5
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• pp.27-39
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• 2010

Objectives: The purposes of this study were to examine the contribution of each of the Transtheoretical Model components in explaining stages of smoking cessation and to identify factors associated with the smoking cessation behavior among Korean college students. Methods: The participants for this study were 334 undergraduate students who enrolled in general education courses. Self-report surveys were distributed and returned. The survey variables comprised the stages of change for smoking cessation, self-efficacy, decisional balances and processes of change in smoking cessation. Results: Significant differences were noted in the five stages of change for self-efficacy, decisional balance, and the processes of change. The strongest factor associated with the smoking cessation behavior was self-efficacy. Conclusion: Study findings indicate application of the Transtheoretical Model may be useful to enhance future smoking cessation efforts in college students. The strategies to enhance smoking cessation self-eficacy in college students will be an important intervention component in future studies.

• Journal of the Korean Society for Library and Information Science
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• v.51 no.4
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• pp.161-181
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• 2017

The present study aimed at investigating health information seeking behaviors of health information consumers who changed their health behaviors by using mobile health applications according to the dynamic stages of change. For this purpose, the study analyzed the changes of perception, health information needs and seeking behaviors of health information consumers in each stage by employing Stages of Change as a theoretical framework. A total of 30 college students participated in this study to change health behaviors such as smoking or alcohol cessation, and regular exercise, while using health applications for 3 months; then written interviews were conducted with these students based on their experiences. Findings indicated that the study participants used diverse information sources, including social media and the Internet, seeking for different types of sources of information according to information needs. Above all, the health information needs and seeking behaviors examined in active utilization of health applications by consumers in the stage of action suggest the implications of health information services, particularly through health applications. In addition, stress management and relapse that consumers experienced while attempting health behavior changes, and the positive and negative effects of behavior changes inform health information providers of insights for supporting consumers' changes of health behaviors.

• Digital Contents
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• no.6 s.109
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• pp.90-99
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• 2002

디지털시대의 소비자행위는 디지털과 온라인에 의한 새로운 유통구조의 생성으로 인해 소비자의 행위도 그 패턴이 변화되고 있다. 즉, 소비의 패러다임이 변하고 있다는 것이다. 그러한 시점에 즈음하여 소비자의 새로운 행위패턴에 대하여 알아보고자 한다.

• 한국노년학
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• v.30 no.3
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• pp.695-708
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• 2010

Purpose: This study was to explore the factors affecting on Dietary Behavior Change of the vulnerable elderly based on the Stage of Change. Methods: This study was a secondary analysis of the data collected from 1,262 elderly who were participated in the case management program. Total 984 participants who responded all questionnaire were included in the analysis. The variables included general characteristics, health behavior, health status, and dietary behavior stage. The data collected were analyzed by descriptive statistics, trend test and multi-variate logistic regressions. Results: about twenty four percent of the vulnerable elderly subject was pre-contemplation stage and 46.1% of them was contemplation stage of dietary behavior. Having a depressive mood, dependance of Instrumental Activity of Daily living, and being medicaid affected on starting or on maintaining healthy dietary behavior in vulnerable elderly negatively. Conclusion: The tailored nutritional intervention depending on dietary behavior stage are needed for the vulnerable elderly to improve the health. The program which can maintain the function remained of elderly and give psychological support together will be more effective.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1328-1331
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• 2013

본 논문에서는 스마트폰 내장 가속도 센서를 이용한 2단계 행위 인식 시스템을 제안한다. 제안하는 행위 인식 시스템에서는 행위 별 시간에 따른 가속도 센서 데이터의 변화 패턴을 충분히 반영하기 위해, 1단계 분류에서는 결정트리 모델 학습과 분류를 수행하고, 2단계 분류에서는 1단계 분류 결과들의 시퀀스를 이용하여 HMM모델 학습과 분류를 수행하였다. 또한, 본 논문에서는 특정 사용자나 스마트폰의 특정 위치, 방향 변화에도 견고한 행위 인식을 위하여, 동일한 행위에 대해 사용자와 스마트폰의 위치, 방향을 변경하면서 다양한 훈련 데이터를 수집하였다. 6720개의 가속도 센서 데이터를 이용하여 총 6가지 실내 행위들을 인식하기 위한 실험들을 수행하였고, 그 결과 높은 인식 성능을 확인 할 수 있었다.

• Korean Journal of Social Welfare
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• v.63 no.1
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• pp.187-215
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• 2011

This study examined the longitudinal relationship between depressive symptoms and alcohol use based on the tension reduction hypothesis and the intoxication hypothesis considering for path of depressive symptoms on alcohol use and vice versa simultaneously. And this study examined the effect of psychosocial behavior factors (i.e. smoking level, self-esteem, satisfaction with family relationships, and satisfaction with social relationships) on depressive symptoms and alcohol use. Using the data on the Korea Welfare Panel Study for the 1st, 2nd, and 3rd years, this study were estimated using the Latent Growth Curve Model which is helpful for examining differences between the two. The results are as follows: the initial level of alcohol use had a positive impact on the rate of change in depressive symptoms, thereby supporting the intoxication hypothesis. Second, self-esteem and satisfaction with family relationships act as variables with the biggest effect on the initial level and the rate of change in depressive symptoms, whereas other psychosocial behavior factors such as smoking level and satisfaction with social relationship exert the largest influence over the initial level and the rate of change in alcohol use. This study has implications in that it clarified the confused relationship mechanism between alcohol use and depressive symptoms the two. Based on the finding of the study, political and practical implications were discussed.

• Journal of The Korean Association For Science Education
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• v.41 no.5
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• pp.415-428
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• 2021

The COVID-19 pandemic has changed everything, even education. Last year when distance learning was introduced, science teachers faced many challenges to overcome. However, teachers adapted quickly, and in this year, it became the 'new normal'. In this situation, teachers are likely to habitually repeat past practices, but the context of the second year of distance learning is changing constantly, and teachers are asked to interpret the problem occurring in a situation and to adjust their practice for solving the problem with their teacher agency. In this study, we explore the emergence of science teacher agency and factors shaping teacher agency in the second year of distance learning and we focus on teachers' agentic practice that did not follow their past practice without reflection. For this purpose, we mainly analyze the semi-constructed interview of three science teachers. In the first year of distance learning, two teachers maintained their practice, not much different to face-to-face learning. However, one teacher reflected upon herself and started to recognize and solve her problems. Reflection for her practice can support this process. Another teacher changed her practice due to external suggestions, but it evolved her practice to fit the situation better, and her experience of last year helped her to adapt to the change. The other teacher who modified her practice to persist her professional purpose last year was consistently practicing in the second year and collaboration and autonomy can support her. This study shows the teachers' dynamic change of agency and the emergence for the relational interaction between teacher and context.

• Korean Journal of Social Welfare
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• v.62 no.4
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• pp.79-102
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• 2010

This paper aims to analyse the recent changes in social welfare services from a relational perspective. Discourses of the privatization of welfare state, the welfare mix approach, and consumerism have provided frames for interpreting the changes in social services in Korea. The nature of social welfare services, being a "relational goods" requires its focus to be in its relational aspects: the relation between service user and service practitioner; the relation between service user and provider; the relation between service user and government; the relation between service practitioner and provider; the relation between service practitioner and government; and the relation between service provider and government. Analysis of such relations will explore their transformation toward formalness and equality in social welfare services. In conclude, the study reveals a process of modernization, defined as a transition from informal relations to formal contractual relations, based on one's rights, responsibilities and obligations. Previous relations, of paternalistic, arbitrary and hierarchical characteristics, can be seen as being substituted by more formal, institutionalized and equalized relations. In terms of service purchasing contract between service user and service provider and employment contract between service provider and service worker are recognized with the latter characteristics. This relational analysis leads a discussion concerning the creation of institutional basis of one's rights and responsibilities in the fields of social welfare services in Korea.