• Journal of the Korean Data and Information Science Society
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• 제18권4호
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• pp.1033-1043
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• 2007

The multi layer perceptron for segmenting objects in images only uses the input windows that are made from a image in a fixed size. These windows are recognized so each independent learning data that they make the performance of the multi layer perceptron poor. The poor performance is caused by not considering the position information and effect of input windows in input images. So we propose a new approach to add the position information and effect of input windows to the multi layer perceptron#s input layer. Our new approach improves the performance as well as the learning time in the multi layer perceptron. In our experiment, we can find our new algorithm good.

• 보건교육건강증진학회지
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• 제24권4호
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• pp.65-85
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• 2007

Objectives: The purpose of this study was to identify the major health problems of poor children, and to provide basic information for developing health care program for low income children in underserved area. Methods: Health data were collected through medical examination(KAHP Social Welfare Service) and analysed for 3,081 poor children in 106 local children's centers nationwide. Results: 1. The mean height and weight of poor children were lower than those of nonpoor children. The differences were increased by age. 2. The rate of relative low weight was higher in poor children than in nonpoor children. On the contrary, The obesity rate was higher in nonpoor children than in poor children. 3. Poor children were more likely to have vision problem, anemia, high blood pressure, and oral health problems than nonpoor children. 4. The Health problems of children were the most serious in single father family. Conclusion: In order to improve children's health status, health promotion program for poor children should be developed and implemented. Health promotion program should include activities including regular health examination, home visiting, nutrition support, managed health care, health counseling and education. And the community support network was suggested for the efficacy of the program, including home, school and community.

• 융합정보논문지
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• 제10권4호
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• pp.115-123
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• 2020

본 연구는 유급노동이 빈곤한 노인의 자기효능감과 대인관계에 어떠한 영향을 미치는지 조사하는데 그 목적이 있다. 또한 빈곤한 노년기 삶에서 유급노동을 통해서 얻을 수 있는 정신적·사회적 실효성에 대해 측정하고자 하였다. 이를 토대로 본 논문은 유급노동의 질이 빈곤한 노인의 대인관계에 긍정적 영향을 미칠 것이고, 또한 자기효능감은 유급노동의 질과 빈곤노인의 대인관계 사이에서 매개역할을 할 것이라는 가정 하에 서울 및 경기에 거주하는 빈곤한 노인을 대상으로 설문조사를 실시하여 165부의 최종 표본을 선별하여 분석하였다. 분석 결과, 유급노동의 질은 빈곤한 노인들의 대인관계에 유의한 영향을 미치는 것으로 분석되었으며, 자기효능감의 유의한 매개효과도 확인되었다. 이러한 연구결과를 바탕으로 빈곤노인의 유급노동의 질을 향상시킬 정책의 필요성과 사회복지 현장에서 노인의 자기효능감을 증진시키기 위한 실천방안을 제안하였다.

• Annals of Occupational and Environmental Medicine
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• 제34권
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• pp.2.1-2.14
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• 2022

Background: Because income and working hours are closely related, the health impact of working hours can vary according to economic status. This study aimed to investigate the relationship between working hours and the risk of poor self-rated health according to household income level. Methods: We used the data from the Korea National Health and Nutrition Examination Survey VI and VII. The information on working hours and self-rated health was obtained from the questionnaire. After stratifying by household income level, the risk of poor self-rated health for long working hour group (≥ 52 hours a week), compared to the 35-51 working hour group as a reference, were calculated using multiple logistic regression. Results: Long working hours increased the risk of poor self-rated health in the group with the highest income, but not in the group with the lowest income. On the other hand, the overall weighted prevalence of poor self-rated health was higher in the low-income group. Conclusions: The relationship between long working hours and the risk of poor self-rated health varied by household income level. This phenomenon, in which the health effects of long working hours appear to diminish in low-income households can be referred to as the 'poor worker's long working hours paradox'. Our findings suggest that the recent working hour restriction policy implemented by the Korean government should be promoted, together with a basic wage preservation to improve workers' general health and well-being.

• 지식경영연구
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• 제22권1호
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• pp.1-19
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• 2021

대규모 병원정보시스템 프로젝트가 계획 대비 지연되는 경우가 종종 발생하고 있다. 따라서 프로젝트 관리 측면에서 일정 지연을 촉발하는 원인을 검토하고 지연 유발 요인들 간 인과관계 분석이 필요하다. 본 연구는 근거이론 방법론을 활용하여 병원정보시스템 개발 프로젝트 사례에 대한 일정 지연 요인을 발견하고 이들 간의 인과관계를 파악하고자 한다. 연구 결과, '비현실적 일정 수립'은 도미노 현상과 같이 전반적인 일정 지연에 영향을 미치고, '기존 시스템 분석 미흡'은 분석 품질의 저하를 야기하는 반면 '서브시스템 통합 인터페이스 부실'은 설계 품질의 저하로 이어졌다. 본 연구는 학술적인 측면에서 프로젝트 지연에 영향을 미치는 요인을 찾아내고 지연 요인들 간의 인과 관계를 분석하였으며, 실무적 관점에서는 System Integration (SI) 기업, 병원, 프로젝트 관리자 입장에서 프로젝트 일정 지연을 최소화할 수 있는 방안을 제시한 점에 의의가 있다.

• 아동학회지
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• 제32권5호
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• pp.151-165
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• 2011

The purpose of this study was to examine the relationship between the information literacy of preschoolers and their developmental trends. The subjects in this study were 122 preschoolers. After taking tests in information literacy and early childhood development, the collected data was analyzed. The findings of the study were as follows : First, there were gaps among the preschoolers in the level of early childhood development according to the relative levels of their information literacy. When a post-hoc analysis was carried out to investigate intergroup differences in detail, there were statistically significant gaps between the preschoolers with excellent information literacy and those with intermediate-or poor information literacy, and between the preschoolers with intermediate information literacy and those with poor information literacy. Second, the differences in terms of the levels of information literacy and the impact these differences made to their body, cognition, language, sociability and emotions which comprise the five subfactors of the early childhood development inventory were checked after the mutual influence of the five subfactors was controlled. As a result, statistically significant gaps were apparent in all the subfactors of early childhood development according to relative levels of information literacy. The preschoolers who had a better level of information literacy exhibited a statistically significantly better level of development in every subfactor.

• Journal of Communications and Networks
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• 제12권4호
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• pp.366-374
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• 2010

Coded cooperation is a promising user cooperation scheme. In this paper, we first propose a novel network-coding-based coded cooperation scheme. When a user decodes its partner's information correctly in the first frame, it transmits the combination of the partner's parity bits and its own parity bits through network coding in the second frame. This is distinct from the classical scheme, where the user only transmits the partner's parity bits during cooperation. We analyze the outage probability of the proposed scheme, and show that it achieves a full diversity order. Numerical evaluations reveal that the proposed scheme outperforms the classical scheme when the inter-user channel is poor, yet is worse when the inter-user channel is strong. Also, the results show that the proposed scheme always outperforms that of no cooperation in various channel conditions while the performance of classical scheme is worse than that of no cooperation with the poor inter-user channels. This means that the performance of the proposed scheme is more stable than the classical scheme and the proposed scheme is more tolerant to the poor inter-user channels. To combine the advantages of the proposed scheme and the classical scheme under different inter-user channel conditions, we propose an adaptive solution. This adaptive scheme enhances the system performance considerably in all channel conditions in spite of the inter-user channel quality, at the expense of only one acknowledgement or non-acknowledgement bit.

• Safety and Health at Work
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• 제14권4호
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• pp.368-374
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• 2023

Background: Recognizing that access to safe and healthy working conditions is a human right, the World Health Organization (WHO) calls for specific occupational safety and health (OSH) programs for health workers (HWs). The WHO health systems' building blocks, and the International Labour Organization (ILO), highlight the importance of information as part of effective systems. This study examined how OSH stakeholders access, use, and value an occupational health information system (OHIS). Methods: A cross-sectional survey of OSH stakeholders was conducted as part of a larger quasi experimental study in four teaching hospitals. The study hospitals and participants were purposefully selected and data collected using a modified questionnaire with both closed and open-ended questions. Quantitative analysis was conducted and themes identified for qualitative analysis. Ethics approval was provided by the University of Pretoria and University of British Columbia. Results: There were 71 participants comprised of hospital managers, health and safety representatives, trade unions representatives and OSH professionals. At least 42% reported poor accessibility and poor timeliness of OHIS for decision-making. Only 50% had access to computers and 27% reported poor computer skills. When existing, OHIS was poorly organized and needed upgrades, with 85% reporting the need for significant reforms. Only 45% reported use of OHIS for decision-making in their OSH role. Conclusion: Given the gap in access and utilization of information needed to protect worker's rights to a safe and healthy workplace, more attention is warranted to OHIS development and use as well as education and training in South Africa and beyond.

• 정보교육학회논문지
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• 제8권2호
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• pp.155-164
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• 2004

수학과 수 연산 영역의 학습 부진은 위계성이 뚜렷한 수학과의 특성상 이전 학년에서 발생된 학습결손이나 이해의 부족이 다음 학년에서의 학습 방해나 장애로 이어져 결국 학습 부진을 증대시켜 학습 불능에까지 이르게 되는 등 심각한 문제로 대두되었다. 그러나 교사는 학급당 40여명의 학생지도, 과중한 잡무로 부진아의 개별 지도시간을 확보하기가 어려워 부진요인에 적합한 지도가 되지 못하고 있다. 또한 부진아의 평가 결과가 분석되어 관리되지 못하고 있기 때문에 부진아의 지도가 효과적으로 이루어지지 못하고 있다. 이러한 문제점을 해결하기 위하여 본 논문에서는 수 연산 영역 부진아의 학습 부진요소를 찾아내어 그에 맞는 적절한 학습을 제공하고 시간과 공간의 제약이 없이 시스템에 접근하여 학습할 수 있도록 하였다. 그리고 그 결과를 DB로 관리하여 부진아를 체계적으로 지도할 수 있도록 초등학교 수 연산 영역 부진아를 위한 웹기반 학습시스템을 구현하고 현장에 적용하여 그 결과를 분석하였다. 그 결과 교사들의 과중한 부담을 덜어 줄 수 있었으며 부진아들의 학습성취도를 높일 수 있었다.

• 대한전자공학회논문지SP
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• 제37권5호
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• pp.1-8
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• 2000

지문인식의 주요 기법으로 사용되어 온 점 패턴 정합 기법은 영상의 질이 열악할 경우 정합 결과의 신뢰성을 보장하기 어려운 단점이 있다 본 논문에서는 유사한 융선 패턴 쌍의 변환 파라메터를 Hough 변환에 의해 산출하여 정합 쌍을 구하고 지문 방향정보를 선택적으로 사용하는 정합률 산출기법에 의해 정합 결과의 검증하는 지문언식 기법을 제안하였다 제안한 기법은 특이점의 개수와 좌표의 변화에 민감하지 않은 특성을 가지므로 열악한 지문영상에서도 낮은 거부율을 유지하면서 0%에 가까운 FAR(False accept rate)를 보장할 수 있다.