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토픽모델링을 활용한 헬스리터러시 관련 국제 연구동향 분석
김수현,강우진,윤은혜,이종욱 한국보건교육건강증진학회 2023 보건교육건강증진학회지 Vol.40 No.2
Objectives: This study aimed to identify global trends and themes in health literacy research through topic modeling of the comprehensive literature, thereby suggesting future directions for health literacy research. Methods: Research papers on health literacy published from 2012 to 2021 were analyzed using a text mining technique called Bidirectional Encoder Representations from Transformers was applied for topic modeling. Results: Of the 12,842 retrieved papers on health literacy, the highest proportion was based on the themes of ‘mental health’ (1,161 papers, 9.04%) and ‘cancer prevention and screening’ (1,146 papers, 8.92%). These were followed by the themes of ‘digital healthcare’ (952 papers, 7.41%), ‘health information education’ (826 papers, 6.43%), and ‘older people’ (801 papers, 6.24%). The number of research papers on health literacy has increased constantly across all topics. Particularly, the topics of ‘infection prevention’ and ‘digital healthcare’ have grown rapidly since 2019. Conclusion: This study showed that health literacy research has expanded from healthcare at the individual level to disease prevention and health promotion at the population level throughout the life course. Future studies should develop a health literacy scale for national monitoring indices as well as optimal communication strategies for disease prevention and health promotion within low health literacy groups.
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다중해상도 근사화 마르코프 의사결정 과정 기반 온라인 경로 계획 기법 연구
김수현,정동원 한국항공우주학회 2025 한국항공우주학회지 Vol.53 No.1
This paper presents the Markov Decision Process(MDP) based online path planning algorithm for unmanned aerial vehicle (UAV). It is not suitable for path planning to be implemented online due to the high memory requirement of the general MDP by taking into account the limited computational resources. This paper presents a novel algorithm suitable for online implementation by approximating the grid map using a multiresolution grid decomposition technique and redefining the data structure required for the MDP by considering the connectivity for various gird sizes. The performance of the proposed algorithm is verified through the numerical simulation, which shows that the proposed algorithm is more efficient than the general MDP in terms of the computational throughput as well as the memory requirement. In addition, the applicability of the proposed algorithm to real systems is determined using the developed high-fidelity integrated simulator. Through this simulation, it is confirmed that the proposed algorithm can safely reach the destination by planning the path online and flying according to the planned result.
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PPKTP 자발매개하향변환 과정을 이용한 편광상태 얽힘 광자 쌍의 생성
김수현,문한섭 한국물리학회 2016 새물리 Vol.66 No.9
We demonstrated polarization-entangled photon pairs based on a polarization sagnac interferometer (PSI) in the spontaneous parametric down-conversion (SPDC) process with a periodically-poled potassium-titanyl-phosphate (PPKTP) crystal. We confirmed the collinear and the degenerate conditions for photon pairs by measuring the spatial distribution and spectrum of the generated photon pairs. The polarization correlation between the generated photon pairs was observed by coincidence counting of photon pairs as a function of the angles with respect to the normal to the surface of the analyzer. 본 연구에서는 비선형 매질인 PPKTP(periodically-poled potassium titanyl phosphate)을 사용하여 사냑 간섭계(polarization sagnac interferometer, PSI)를 구성하여 자발매개하향변환(spontaneous parametric down conversion, SPDC)과정에 의한 편광상태의 상관관계를 가진 편광 얽힘 광자 쌍(polarization-entangled photon pairs)을 생성하였다. 406 nm 파장의 펌프광을 입사하였을 때, PPKTP에서 생성된 812 nm의 광자 쌍의 공간 이미지와 스펙트럼을 측정하여 collinear degenerated photon pair 생성 조건을 확인하였다. 생성된 편광 얽힘 광자 쌍을 분석자 (analyzer)에 따른 광자 쌍의 동시계수를 측정하여 광자 쌍의 편광 상관관계를 확인하였다.
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김수현,최연희 한국노년학회 2007 한국노년학 Vol.27 No.4
본 연구는 신체적 건강상태가 노인의 자살생각에 독립적인 영향을 주는 변수인지를 파악하고 노인의 자살생각에 대해 신체적 건강상태와 우울증상 간의 상호작용이 미치는 영향에 대해 검증하고자 하였다. 본 연구의 대상자는 대구지역에 거주하는 만 60세 이상의 노인 302명이었으며, 설문지 조사를 통해 자료를 수집하였다. 연구결과 노인들의 자살생각 정도는 평균 17.88(SD=13.82)(가능범위 0-38점)로 높게 나타났다. 건강상태는 인구사회학적 변수, 우울증상을 통제한 상태에서 자살생각에 유의한 영향을 주는 변수인 것으로 확인되었으며, 특히 우울증과의 상호작용을 통해 자살생각에 영향을 미치는 영향이 더 큰 것으로 확인되었다. 또한 노인의 자살생각에 가장 큰 영향을 미치는 변수는 우울증이었고, 남자 노인일수록, 연령이 낮을수록, 배우자가 없을수록 자살생각이 더 높은 것으로 나타났다. 건강서비스 제공자들은 본 연구에서 확인된 노인자살의 고위험군을 대상으로 자살예방을 위한 스크리닝을 시행하여야 하겠으며, 특히 신체적 질환을 앓고 있는 노인들이 질병의 과정에서 우울증을 경험하고 있는지 모니터할 필요가 있겠다. 노인자살의 위험정도가 매우 높은 것으로 확인된 대상자의 경우 적절한 의뢰와 입원 및 예방 프로그램을 시행할 필요가 있겠다. The purposes of the study were to explore the influence of physical health on suicidal ideation in older adults above and beyond sociodemographic and depressive variables and to test the interaction effect between physical health and depression on suicidal ideation. Subjects in the study were 302 community residents in Daegu who were over 61 years old. The findings showed that suicidal ideation in older adults was high that the average score was 17.88±13.82 (possible range 0-38). Physical health was a significant predictor of suicidal ideation, controlling for demographic variables (gender, age, having spouses, and economic status) and depression, but the interaction effect between physical health and depression had much higher impacts on suicide ideation. The most powerful predictor of suicide ideation was depression. The other significant predictors of higher suicide ideation were male, younger individuals, and having no spouse. Results suggest that health care providers need to assess whether older adults with physical illnesses have been placed with the subsequent development of depression, and if needed, make referral for mental health centers and provide some programs for suicide prevention.
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