국내외 권장 칫솔질 방법의 조사 비교

김찬희 ( Chanhee Kim ),김경민 ( Gyungmin Kim ),이주영 ( Jooyoung Lee ),권호근 ( Hokeun Kwon ),김백일 ( Baekil Kim ) 대한예방치과·구강보건학회 2015 大韓口腔保健學會誌 Vol.39 No.3

Objectives: The aim of this study was to compare the tooth brushing methods recommended by dental associations and toothbrush manufacturers in various countries including South Korea. Methods: Eighteen countries―6 Asian, 2 North American, 2 Oceanian, and 8 European―were selected from members of the OECD, EU, and APEC, using information obtained from the primary email address of each dental association and information obtained from the websites of the associations regarding the officially recommended tooth brushing methods. In addition, 12 major toothbrush manufacturers were selected based on their market share, including 4 Asian manufacturers, 2 North American, and 2 European. Information about recommended tooth brushing methods was obtained from their websites. Results: The countries recommending a particular tooth brushing method by name were South Korea, Hong Kong, and Taiwan. While South Korea recommended the “rolling” technique, Hong Kong and Taiwan recommended the “bass” technique. Except for these countries, the other countries presented their recommended methods by explaining the initial position or motion of the toothbrush. The most commonly recommended method was tilting the brush head at an angle of 45 degrees to the gingival margin; this was recommended by 8 countries (44%) and 6 toothbrush manufacturers (75%). Brushing with a vibrating motion was also recommended by 9 countries (50%) and 4 manufacturers (50%). Conclusions: The most recommended brushing method was initially positioning the toothbrush at an angle of 45 degrees to the gingival margin and using a vibrating motion, which is effective against periodontal diseases. However, South Korea recommended the rolling technique, which is effective for controlling dental plaque. Given the high frequency with which periodontal disease occurs in South Korea, vibrating the toothbrush on the gingival margin should be recommended in addition to the rolling technique.

임상실습 현장에서 간호대학생이 경험하는 도덕적 고뇌

김찬희(Kim, Chanhee),최희승(Choi, Heeseung) 한국간호교육학회 2016 한국간호교육학회지 Vol.22 No.3

Purpose: This study explores the moral distress that nursing students experience during their clinical practice in Korea. Methods: Data were collected using focus group interviews, and analyzed using qualitative content analysis. Participants were recruited from three nursing schools in three different cities; each focus group interview lasted between one to two hours. Results: Twenty-two nursing students with more than one year of clinical practice experience participated. Three categories and ten themes were extracted. The following situational categories: “unprotected patients right and dignity,” “clinical settings in which standards of care are not upheld,” “disrespectful hospital culture,” and “inconsistent and unsystematic clinical education” caused moral distress. Types of responses to moral distress included: “shock and confusion over the gap between reality and moral standards,” “powerlessness when cannot advocate patients,” “fear and doubts about nursing career,” and “moral desensitization and disappointment in oneself.” “Expressions of moral distress and the need for advice” and “a search for meaning and hope” were identified as coping strategies. Conclusion: These results demonstrate the need for systematic clinical practicum and education programs to minimize moral distress. These programs may offer opportunities for students to turn moral distress into opportunities for learning and growth in the future.

VR 환경에서 상황 제어를 이용한 상호작용 개선

김찬희(Chanhee Kim),박종일(Jong-Il Park) 한국방송·미디어공학회 2021 한국방송공학회 학술발표대회 논문집 Vol.2021 No.6

본 연구는 사전에 VR(virtual reality) 콘텐츠 상황을 제어함으로써 파악된 사용자의 의도에 따라 가상 객체에 우선순위를 부여하고, VR 환경에서 사용자와 가상 객체 간에 집는 상호작용(interaction)의 개선 방안을 제안한다. VR 콘텐츠에서 가상 객체를 집는 행위는 필수적이면서 가장 많이 사용되는 상호작용이다. 이때 VR 환경에서 가상 객체가 서로 가까이 위치해있는 경우 집는 상호작용이 사용자의 의도와 다른 가상 객체에 적용되는 경우가 발생하며 콘텐츠를 진행하는데 방해요소로 작용한다. 이 현상을 방지하기 위해 본 논문에서는 사전에 제어한 상황에 사용되는 가상 객체에 더 큰 가중치를 부여하는 방법을 제안한다. 사용자 만족도 실험을 통해 거리만을 고려하는 기존 방식 대비 36.31%가 증가하였으며 상호작용이 더 정교하게 수행됨을 입증하였다.

VR 환경에서 가상 객체 선택 상호작용 개선을 위한 사용자 의도 반영 방법

김찬희(Chanhee Kim),남현길(Hyeongil Nam),박종일(Jong-Il Park) 한국방송·미디어공학회 2021 방송공학회논문지 Vol.26 No.6

Heterogeneous Trajectories of Cognitive Function in Older Adults with Diabetes

Chanhee Kim(김찬희),Min Jung Kim(김민정),Chang Gi Park(박창기) 대한스트레스학회 2019 스트레스硏究 Vol.27 No.1

본 연구는 지역사회 거주 당뇨노인의 인지기능의 변화궤적 양상을 확인하고자 하였다. 한국복지패널 1차년도부터 6차년도 자료를 활용하여, 당뇨진단을 받은 65세 이상의 노인 672명의 자료를 분석하였다. 성장혼합모형 분석 결과, 당뇨노인의 인지기능의 변화양상은 ‘정상-유지형’ (41.5%), ‘정상-저하형’ (23.8%), ‘경도인지장애-유지형’ (17.1%), ‘경도인지장애-저하형’ (11.2%), ‘중증인지장애-저하형’ (6.4%)의 5가지 유형으로 확인되었고, 연령, 성별, 가계소득, 자기보고 건강상태가 영향 요인으로 확인되었다. 본 연구 결과를 통해 당뇨노인의 인지기능의 변화 양상은 이질적이며, 당뇨노인의 인지기능 저하를 예방하기 위해 대상자에 대한 개별적인 이해와 맞춤형 중재가 필요함을 확인할 수 있었다. Background: Given the rapidly aging population and increasing diabetes prevalence in Korea and worldwide, maintaining optimal cognitive function is a concern in older adults with diabetes. This study aimed to identify heterogeneous trajectories of cognitive function in older adults with diabetes based on the Mini-Mental State Examination and characterize these trajectories. Methods: Study participants consisted of 672 community-dwelling Korean older adults with diabetes, and data were obtained from the population-based Korean Longitudinal Study of Aging from 2006 through 2016. Growth mixture modeling (GMM) was employed to identify distinct trajectories of cognitive function in older adults with diabetes. Results: We found that older adults with diabetes followed five distinct cognitive function trajectories over 10 years: normal-maintained (41.5%), normal-declined (23.8%), mildly impaired-maintained (17.1%), mildly impaired-declined (11.2%), and severely impaired-declined (6.4%). Also, we found that age, gender, household income, and self-rated health status at baseline were associated with these trajectories. Conclusions: Our identification and characterization of heterogeneous cognitive function trajectories in older adults with diabetes have significant implications for developing tailored interventions to older adults with diabetes, specifically to whom at heightened risk for cognitive decline and consequent deterioration in essential diabetes self-management activities.

바이오폴리머 혼합토를 활용한 제방 통문 주위 내부침식 저항성 평가를 위한 모형실험

김민진(Minjin Kim),문준호(Junho Moon),김찬희(Chanhee Kim),김영욱(Younguk Kim) 한국지반환경공학회 2021 한국지반환경공학회논문집 Vol.22 No.12

우리나라 제방 중 내부침식에 의한 붕괴는 약 10% 이상을 차지하고 있다. 내부침식 뿐만 아니라 월류, 제체 불안정 등으로 인한 제방의 붕괴를 사전에 방지하고 최소한의 피해를 위하여 다양한 연구들이 시도되고 있고, 그 중 하나가 바이오폴리머 적용에 관한 연구이다. 바이오폴리머의 적용 분야에는 강도, 식생, 내침식성으로 나뉘며 본 연구에서는 내침식성에 대한 내용을 다룰 것이다. 본 연구의 목적은 모형제방의 다짐도 및 내부침식 유도로에 따른 붕괴양상을 검토하고 적합한 조건을 선정하여 바이오폴리머 혼합토 제방의 효과를 검증하기 위한 실규모 실험 기초자료를 확보하는 것이다. 모형제방의 다짐도를 상, 중, 하로 나누어 각각의 유도로 조건에 따른 침식양상을 검토하여 가장 적합한 실험 조건을 선정하였으며, 바이오폴리머 혼합토 처리 유무에 따른 효과를 확인하였다. 실험결과, 바이오폴리머 혼합토를 적용한 제방에서의 내부침식률이 크게 감소하였으며, 실제 제방에 적용이 가능할 것으로 판단된다. 그러나 본 연구에서는 스케일을 축소시킨 모형제방에 바이오폴리머 혼합토를 적용하여 실제 적용 가능한지 여부를 연구하였다. 따라서, 실제 현장적용성 평가를 위해서는 실규모 제방실험이 필요할 것으로 판단된다. River-side Embankment collapse involves various causes. The embankment collapse due to internal erosion around embedded structures reaches up to more than 10% in Korea. Many studies are being attempted to prevent from the collapse of the embankment rooted from overtopping and instability as well as internal erosion. One of them is the study on the application of biopolymers. The application of biopolymers to soils are divided into enhancing strength, vegetation and erosion resistance. This study investigated the effect of biopolymer treated soil on erosion resistance. The main goal of the study is to obtain basic data for real-scale experiments to verify the effectiveness of biopolymer treated soil embankment including a review of the collapse pattern in the model embankment with various test conditions. The optimized experimental conditions were selected by examining the erosion patterns according to each induction path with three compaction degree of the model embankment. As a result of the experiment, the internal erosion rate in the embankment to which the biopolymer treated soil was applied is greatly reduced, and it could be concluded that it might be applied to the actual embankment. However, in this study, the conclusion was drawn only within the scaled-down model embankment. In order to practically apply the biopolymer treated soil to the embankment, the study considering the scale effect would be needed.

광마스크 제작을 위한 Red LED 소자의 광출력 특성

천민우(Minwoo Cheon),김찬희(Chanhee Kim) 한국정보기술학회 2019 Proceedings of KIIT Conference Vol.2019 No.6

국내 중학생의 자살생각 빈도에 미치는 영향 요인: 영과잉 음이항(Zero-Inflated Negative Binomial, ZINB) 회귀분석 방법을 이용하여

강경림(KyungIm Kang),김찬희(Chanhee Kim),정재원(Jaewon Joung) 대한스트레스학회 2019 스트레스硏究 Vol.27 No.3

본 연구는 중학생의 자살생각 빈도에 영향을 미치는 요인을 확인하고자 시도되었다. 한국복지패널 13차년도(2018년) 아동부가조사 데이터를 활용하여 중학생 391명의 자료를 분석하였다. 영과잉 음이항(Zero-Inflated Negative Binomial) 회귀분석 결과, 여자 중학생, 1학년에 비해 3학년, 친구애착정도가 낮은 중학생일수록 자살 생각에 대한 빈도가 높았고, 현재 자살 생각이 없는 중학생의 경우라도 우울 및 불안의 정도와 부모 방임의 수준이 높아질수록 자살 생각의 가능성이 높아질 수 있음을 확인할 수 있었다. 본 연구 결과를 통해 확인된 위험요인을 토대로 중학생을 위한 다양한 수준에서의 맞춤형 자살예방 중재를 개발할 수 있을 것이다. Background: Suicide among Korean middle school students is a growing social concern. Exploring factors associated with suicide ideation is important for suicide prevention in middle school adolescents. The purpose of this study was to identify risk factors influencing frequency of suicidal ideation among middle-school students in Korea. Methods: The study was a cross-sectional descriptive study. The participants were 391 middle school students and data were obtained from the 13th wave of Korean Welfare Panel Study in 2018. Zero-inflated Negative Binomial Regression model was employed to identify risk factors. Results: Among participants, 67.3% reported they did not have current suicidal ideation. By zeroinflated negative binomial regression analysis, gender, grade, and peer attachment were found to be significant predictors in the count model, and depression/anxiety and parental neglect were found to be significant predictors in the logistic model. These findings suggest that middle school adolescents who were female, 3rd grade students, or had lower peer attachment were associated with increased severity of suicidal ideation. Also, depression/anxiety and parental neglect were identified as risk factors affecting the future likelihood of suicidal ideation among middle school adolescents. Conclusions: Identified risk factors affecting severity and possibility of suicidal ideation may help health care providers to tailor effective suicide prevention interventions for middle school students.

안전보행과 주의운전을 보조 할 수 있는 조명과 설치공간의 디자인연구

이은진(Eunjin Lee),노영숙(Youngsook Rho),김찬희(Chanhee Kim),이지용(Jiyong Lee) 한국디자인학회 2019 한국디자인학회 학술발표대회 논문집 Vol.2019 No.5

발사체 추진 시 전파 화염온도 측정 방법에 대한 고찰

양인아(Ina Yang),남승훈(Seunghoon Nam),이은준(Eunjun Lee),김찬희(Chanhee Kim),박정환(Junghwan Park),김진호(Jinho Kim) 항공우주시스템공학회 2023 항공우주시스템공학회 학술대회 발표집 Vol.2023 No.10