• 문화기술의 융합
• /
• 제8권2호
• /
• pp.109-116
• /
• 2022

코로나 19 위기 상황에서 정부의 대책이 소셜미디어를 통해 어떻게 확산했는지 알아보기 위해 이 연구는 유튜브에서 코로나 19 방역과 백신 접종 관련 이슈의 확산 과정을 네트워크 분석했다. 마스크 대란, 확진자 급증, 백신 수급 문제에 대한 네트워크 분석결과 코로나 19 상황을 전달하는 언론사 채널의 영향력이 컸고, 조회 수도 높게 나타났다. 다만 보수 성향의 채널에서 감정적 헤드라인이 더 많았고, 보수 성향의 개인 채널이 정부에 대한 부정적 메시지를 확산했고 동영상 조회 수도 높게 나타났다. 정부는 소셜미디어에서 확산되는 부정적인 메시지와 허위정보에 대응하기 위해 정확한 정보를 적극적으로 알리고, 언론은 부정확한 정보, 허위정보에 대한 팩트체크를 해야 할 것이다.

• 지역사회간호학회지
• /
• 제33권4호
• /
• pp.418-431
• /
• 2022

Purpose: The aims of this study were to examine the rate of depression among older adults living alone and to identify factors associated with depression in older adults living alone during the COVID-19 pandemic. Methods: A secondary data analysis was performed using data from the 2020 Korea Community Health Survey. The study participants were 18,824 older adults aged 65 years and over living alone. The data of the complex sample design was analyzed with consideration for weights, stratification, and clustering. Complex sample multiple logistic regression was conducted to identify factors associated with depression in older adults living alone during the COVID-19 pandemic. Results: The results showed that the rate of depression in older adults living alone was 6.3%. Older adults living alone with decreased physical activity, decreased hours of sleep, and an increased or similar frequency of meeting with friends or neighbors were found to be more likely to have depression. In terms of factors related to the practice of COVID-19 infection prevention and control rules, not disinfecting regularly and not wearing a mask indoors were related to depression. For health-related factors, fair or poor self-rated health status, not having breakfast every day, and feeling stressed were related to depression. Conclusion: It is recommended to develop tailored interventions to prevent depression among older adults living alone by considering the factors related to their depression during the COVID-19 pandemic.

• Journal of applied mathematics & informatics
• /
• 제40권3_4호
• /
• pp.633-656
• /
• 2022

Many regions of the world are now facing the second wave of boomed cases of COVID-19. This time, the second wave of this highly infectious disease (COVID-19) is becoming more devastating. To control the existing situation, more mass testing, and tracing of COVID-19 positive individuals are required. Furthermore, practicing to wear a face mask and maintenance of physical distancing are strongly recommended for everyone. Taking all these into consideration, an optimal control problem has been reformulated in terms of nonlinear ordinary differential equations in this paper. The aim of this study is to explore the control strategy of coronavirus-2 disease (COVID-19) and thus, minimize the number of symptomatic, asymptomatic and infected individuals as well as cost of the controls measures. The optimal control model has been analyzed analytically with the help of the necessary conditions of very well-known Pontryagin's maximum principle. Numerical simulations of the optimal control problem are also performed to illustrate the results.

• 한국보건간호학회지
• /
• 제35권3호
• /
• pp.401-414
• /
• 2021

Purpose: The purpose of this study was to compare the practice of quarantine guidelines and psychological influence between the young (aged under 64 years) and the elderly (aged over 65 years) groups during the coronavirus disease 19 (COVID-19) pandemic. Method: The data of this study were obtained from the Community Health Survey, 2020, Korean Disease Control and Prevention Agency. A total of 229,296 (young group: 156,314, elderly group: 72,812) participants were included in this study. Independent t-test, chi-square test and descriptive analysis were used for analyzing the data. Result: Elderly group showed lower adherence to wearing face-mask, maintaining social distance when outgoing and practicing handwashing rules than the young group. The elderly group showed a higher level of psychological influence than the young group. In addition, the elderly group had fewer supporters when they were isolated than the young group. Also, the elderly had difficulties in following the quarantine guidelines related to COVID-19. Conclusion: To prevent infection and death from COVID-19 in the elderly, proper education and support programs are needed. Also, support groups should be prepared and applied to relieve their psychological impact related to COVID-19.

• International Journal of Advanced Culture Technology
• /
• 제10권1호
• /
• pp.294-301
• /
• 2022

COVID-19 is a crisis with numerous casualties. The World Health Organization (WHO) has declared the use of masks as an essential safety measure during the COVID-19 pandemic. Therefore, whether or not to wear a mask is an important issue when entering and exiting public places and institutions. However, this makes face recognition a very difficult task because certain parts of the face are hidden. As a result, face identification and identity verification in the access system became difficult. In this paper, we propose a system that can detect masked face using transfer learning of Yolov5s and recognize the user using transfer learning of Facenet. Transfer learning preforms by changing the learning rate, epoch, and batch size, their results are evaluated, and the best model is selected as representative model. It has been confirmed that the proposed model is good at detecting masked face and masked face recognition.

• 한국융합학회논문지
• /
• 제13권5호
• /
• pp.501-508
• /
• 2022

고혈압을 비롯한 기저질환자의 COVID-19 발생률과 사망률이 높다고 밝혀지고 있다. COVID-19 대유행 상황에서 건강관리를 위해서 손 씻기만큼 칫솔질은 매우 중요하다. 이에 본 연구의 목적은 고혈압 기저질환자의 칫솔질과 손 씻기 실천율과의 관련 요인을 파악하기 위하여 수행되었다. 지역사회건강조사 2020년 원시자료를 이용하여 만 40세 이상 고혈압 기저질환자 62,762명을 대상으로 분석하였다. 연구결과 여성, 연령이 낮을수록, 교육수준이 높을수록, 외출 시 마스크 착용자, 점심식사 후 칫솔질 실천자에서 손 씻기 실천율이 높게 나타났다. 칫솔질을 실천한 고혈압 기저질환자에서 손 씻기 실천율이 더 높은 것으로 나타나 구강위생과 개인방역 사이의 연관성을 확인하였다. COVID-19 감염에 취약한 기저질환자에게 감염병 예방 행태 실천율을 높이기 위한 지속가능한 방안 마련이 필요할 것으로 사료된다.

• 한국산업보건학회지
• /
• 제30권2호
• /
• pp.124-133
• /
• 2020

Objectives: Mask fit is a crucial factor in preventing respiratory infections among healthcare workers. The current coronavirus(COVID-19) pandemic calls for the replacement of imported N95 medical masks with domestic N95 versions. In this study, we aimed to determine whether these masks provide proper protection. Methods: Thirty-five participants from three healthcare institutions donned four types of masks and Quantitative Fit Tests(Portacount, USA) were performed. The order of fit test for the four types of masks was randomized, and a three-minute washout period was applied between test times(2 min 29 sec) to reduce potential error stemming from physical exhaustion. Results: There were no significant differences in the Fit Factor for the four types of masks, and there were no gender differences. However, the Fit Factor significantly differed across the three healthcare institutions (p=0.007). With eight of the 35 participants passing, the pass rate with the criteria of 100 or higher was 21%. Conclusions: The mask used in this study was a new domestic N95 medical mask, and the participants were unfamiliar with how to wear it. They reported difficulties with mask fitting. In light of a previous finding that mask fit improved with frequently used masks, wearer preferred masks, or when masks that are regularly worn are used during fit training, the fact that participants were unfamiliar with the mask used in this study is a limitation that should not be overlooked.

• Journal of Preventive Medicine and Public Health
• /
• 제54권1호
• /
• pp.31-36
• /
• 2021

Objectives: Non-traditional materials are used for mask construction to address personal protective equipment shortages during the coronavirus disease 2019 (COVID-19) pandemic. Reusable masks made from surgical sterilization wrap represent such an innovative approach with social media frequently referring to them as "N95 alternatives." This material was tested for particle filtration efficiency and breathability to clarify what role they might have in infection prevention and control. Methods: A heavyweight, double layer sterilization wrap was tested when new and after 2, 4, 6, and 10 autoclave sterilizing cycles and compared with an approved N95 respirator and a surgical mask via testing procedures using a sodium chloride aerosol for N95 efficiency testing similar to 42 CFR 84.181. Pressure testing to indicate breathability was also conducted. Results: The particle filtration efficiency for the sterilization wrap ranged between 58% to 66%, with similar performance when new and after sterilizing cycles. The N95 respirator and surgical mask performed at 95% and 68% respectively. Pressure drops for the sterilization wrap, N95 and surgical mask were 10.4 mmH2O, 5.9 mmH2O, and 5.1 mmH2O, respectively, well below the National Institute for Occupational Safety and Health limits of 35 mmH2O during initial inhalation and 25 mmH2O during initial exhalation. Conclusions: The sterilization wrap's particle filtration efficiency is much lower than a N95 respirator, but falls within the range of a surgical mask, with acceptable breathability. Performance testing of non-traditional mask materials is crucial to determine potential protection efficacy and for correcting misinterpretation propagated through popular media.

• 대한의생명과학회지
• /
• 제28권4호
• /
• pp.317-321
• /
• 2022

Due to COVID-19 pandemic, wearing face masks is obligatory to prevent respiratory virus transmissions in the community. However, there are few studies of the desirable number of wearing a face mask, and how to store them for reuse. Therefore, in this study, a survey was conducted among 208 healthy adults, and 27 kf-94 masks worn for 1, 2, and 3 days were collected. To estimate the risk of bacterial contamination, we analyzed the extent of bacterial contamination of the BHI medium and 16S rRNA gene sequencing. With an increase in the number of days of using the mask, the degree of bacterial contamination of the used mask gradually increased. As a result of 16S rRNA PCR performed for strain identification, Staphylococcus, known as a pathogenic bacterium, was identified the most. In conclusion, we found that wearing a cotton KF mask provides an optimal environment for microbes, which are related to the skin and respiratory system, to thrive. Therefore, it is also important to reduce the risk of bacterial infection of the face mask with appropriate sterilization methods.

• 정보화정책
• /
• 제28권3호
• /
• pp.23-48
• /
• 2021

사회적 난제 해결에 있어 정부 역할과 거버넌스 방향에 대한 근본적인 재성찰이 필요한 시점에, ICT 기술발전은 다양한 주체 간 상호 커뮤니케이션을 극단적으로 향상시킴으로써 정부 의사결정에 획기적인 변화를 야기하고 있다. 코로나 펜데믹 상황에서 마스크 수급 불균형이라는 문제해결을 위해 ICT 기술을 기반으로 공공부문과 민간기업 개발자, 시민개발자의 협력네트워크 형성은 새로운 이정표를 제시했다. 본 연구는 공적 마스크 앱 개발과정에서 실시간 소통을 위해 생성된 대화방을 대상으로 e-거버넌스의 속성을 살펴보고, 공적 마스크 앱 개발을 성공적으로 이끌었던 의사소통과정의 역동적 네트워크 구조를 분석하고자 하였다. 분석 결과, 첫째, 온라인 소통기반 e-거버넌스의 작동 가능성을 확인할 수 있었다. 또한 사회문제 해결을 위한 주체 간 전문지식의 결합이 네트워크 내에서 유기적으로 작용하였고, 주요 행위자 간 협력을 위한 정서적 커뮤니케이션이 네크워크의 성공적 운영을 위해 중요한 요소임을 확인할 수 있었다.