간호학생의 전문직 자아개념과 자아탄력성 및 임상수행능력에 관한 연구

홍현화,공정현,강향숙,정현숙,양승경,Hong, Hyeon-Hwa,Kong, Jeong-Hyeon,Kang, Hyang-Suk,Jeong, Hyeon-Suk,Yang, Seung-Kyeong 한국임상보건과학회 2014 한국임상보건과학회지 Vol.2 No.2

Purpose. The purpose of this study is to investigate how professional self-concept and ego-resilience of nursing students affect their clinical competence. Methods. This study conducted a structured-questionnaire survey with 143 nursing students to look into their professional self-concept, ego-resilience and clinical competence. Results. According to the study result, professional self-concept scored 2.85 on average out of 4 points, ego-resilience 3.61 on average, and clinical competence 3.48 on average. It was found that clinical competence had significantly positive correlations with professional self-concept (r=.58, p<.01) and ego-resilience (r=.44, p<.01). According to regression analysis, the factors affecting clinical competence were professional self-concept, ego-resilience, and academic grades in order, and explanatory power was 39.5%. Conclusions. Given the above results, in order to improve clinical competence of nursing students, nursing educational institutes need to find an educational plan which can contribute to increasing professional self-concept, ego-resilience, and academic grades.

인공지능기반 모빌리티 탑승자 집중도 및 감정 추론 기술

권영진(Young-Jin Kwon),김도현(Do-Hyun Kim) 대한인간공학회 2021 대한인간공학회 학술대회논문집 Vol.2021 No.11

Objective: 본 논문은 비대면 디바이스(자율주행 휠체어)에 탑재하여 사용자의 숨겨진 의도를 현장에서 실시간으로 추론 예측하는 인공지능 플랫폼의 주요기술인 영상기반 탑승자 집중도 및 감정 추론 기술에 관한 내용이다. Background: 비대면 디바이스 시스템에서 사용자 감정, 집중도 등의 인식 기술은 비교적 최근에 개발되고 있는 기술 분야로써 사용자의 부정적 감정을 인식하고 이를 해소할 수 있는 상호작용을 제공하는 데 그 목적이 있으며, 특히 합성곱신경망 (CNN: Convolutional Neural Network)을 이용한 딥러닝 모델들은 그 적용범위를 넓히고 있다. Method: 본 연구에서는 언택트 환경에서 비대면 디바이스를 사용함에 있어 사용자의 사용의도를 추론·예측하기 위해 비접촉식 영상 센서의 이미지 데이터 전처리 기술 및 딥러닝 기반 얼굴 인식을 통한 사용자 다중데이터(감정/집중도) 추론 기술을 제시한다. 본 논문에서 제시하는 기술은 첫번째로 영상기반 사용자 표정/감정 추론을 위한 학습 데이터 셋 가공 기술, 기존 딥러닝 모델 분석, 개선된 딥러닝 모델이다, 두번째로 영상기반 사용자 집중도 추론을 위해 사용자 집중도 정의 및 분류 방법, 기존 딥러닝 모델 분석, 그리고 개선된 사용자 얼굴 행동/상태 인식 모델을 제시한다. Results: 영상기반 사용자 표정/감정 및 집중도 추론을 위해 정면/다각도 학습데이터를 사용하였으며, 얼굴 위치의 편협성을 보완하기 위해 검출 된 얼굴 영역을 포함한 임의의 영역을 Crop 및 Resizing하는 등 이미지 전처리를 수행하였다. 영상기반 사용자 표정/감정 및 집중도 추론 결과로 precision, recall, f1-score 를 제시하였다. Conclusion: 본 논문에서는 사용자의 사용의도를 추론·예측하기 위한 비접촉식 영상 센서기반 얼굴 인식 딥러닝 기술과 기능 및 성능을 기술하였으며, 추후 개발될 기술에 대한 내용도 제시하였다. Application: 본 연구의 결과로 제시되는 요소기술은 비대면 디바이스를 사용하는 서비스 산업 전반에서 활용이 가능하며, 사용자의 숨겨진 의도를 파악하여 사용자 경험 최적화화 하는 분야에 적용될 수 있다.

요양시설 요양보호사를 위한 치매노인의 식사행동장애 대처기술훈련 프로그램 개발 및 효과

홍현화(Hong, Hyun Hwa),구미옥(Gu, Mee Ock) 한국간호과학회 2018 Journal of Korean Academy of Nursing Vol.48 No.2

노인군과 청년군의 보행 속도에 따른 하지 강성 비교

홍현화(H. H. Hong),박수경(S. K. Park) 한국정밀공학회 2011 한국정밀공학회 학술발표대회 논문집 Vol.2011 No.6월

종합병원 간호사의 환자안전문화 인식이 환자안전간호 활동에 미치는 영향

홍현화 ( Hyeonhwa Hong ),이은주 ( Eunjoo Lee ) 이화간호과학연구소 2021 Health & Nursing Vol.33 No.2

Purpose: This study aimed to identify the relationships between patient safety culture perception and patient safety care activities, and address the factors influencing patient safety care activities. Methods: Participants comprised 247 nurses working at three general hospitals located in the Changwon, South Korea area. Self-questionnaires were used to collect the data, and were administered between January 25 and 31, 2018. Data were analyzed using descriptive statistics, t-tests, Pearson's correlation coefficients, and multiple regression analysis with SPSS/WIN 21.0 software. Results: There were significant positive relationships between patient safety culture perception and patient safety care activities (r=.57, p<.001). Factors influencing patient safety care activities among the participants were identified as patient safety knowledge and attitude (β=.20, ρ=.006), working in a non-punitive environment (β=.18, ρ=.007), and age (β=.15, ρ=.040). The explanation power of the regression model was 35.8%. Conclusion: The results suggest that to enhance patient safety care activities, it is necessary to improve nursing education concerning patient safety knowledge and attitude, especially considering age. In addition, a nurses will benefit from working in a non-punitive environment.

노인군 보행 속도 증가에 따른 하지 강성 증가

홍현화(Hyun Hwa Hong),박수경(Su Kyung Park) Korean Society for Precision Engineering 2011 한국정밀공학회지 Vol.28 No.6

Spring-mass models have been widely accepted to explain the basic dynamics of human gait. Researchers found that the leg stiffness increased with gait speed to increase energy efficiency. However, the difference of leg stiffness change with gait speed between the young and the elderly has not been verified yet. In this study, we calculated the lower limb stiffness of the elderly using walking model with an axial spring. Vertical stiffness was defined as the ratio of the vertical force change to the vertical displacement change. Seven young and eight elderly subjects participated to the test. The subjects walked on a 12 meter long, 1 meter wide walkway at four different gait speeds, ranging from their self-selected speed to maximum speed randomly. Kinetic and kinematic data were collected using three force plates and motion capture cameras, respectively. The vertical stiffness of the two groups increased as a function of walking speed. Maximum walking speed of the elderly was slower than that of the young, yet the walking speed correlated well with the optimal stiffness that maximizes propulsion energy in both groups. The results may imply that human may use apparent limb stiffness to optimize energy based on spring-like leg mechanics.

요양시설 치매노인의 식사행동장애와 관련요인

홍현화(Hong, Hyun-Hwa),구미옥(Gu, Mee-Ock) 한국산학기술학회 2015 한국산학기술학회논문지 Vol.16 No.2

본 연구는 요양시설 치매노인을 대상으로 식사행동장애 실태와 영향요인을 규명하기 위한 서술적 조사연구이다. 연구대상은 일 지역 3개 요양시설에 거주하는 치매노인 158명이었으며, 연구기간은 2014년 8월18일부터 9월12일까지였으며, 식사행동장애, 신체기능(K-ADL) 및 인지기능(MMSE-K)을 측정하였다. 수집된 자료는 t-test, ANOVA, 상관관계, 회귀분 석으로 검정하였다. 식사행동장애 정도는 전체 평균이 0.62±0.43점(0-2점 범위)이었고, 식사 중 주의 깊은 감독이 필요하다가 가장 빈도가 높은 식사행동장애였다. 회귀분석결과 신체기능(β=.312), 인지기능(β=-.172) 순으로 식사행동장애에 영향을 미 쳤고, 이들 변수의 설명력은 20.0%였다. 이러한 연구결과는 요양시설 치매노인의 식사행동장애를 돕기 위한 식사행동단계별 대처전략 개발, 시설 돌봄 제공자의 교육프로그램 개발 연구의 필요성을 제시한다. The purpose of this study was to investigate feeding difficulty and its influencing factors of elders with dementia in long-term care facilities. Participants were 158 elders with dementia residing in three nursing facilities. Data were collected from Aug. 18 to Sep. 12 in 2014. The feeding difficulty in dementia scale, Korean version-Activities of Daily Living and Mini-Mental State Exam-Korean version were used as instruments. Data were analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation and stepwise multiple regression by SPSS 17.0. Mean feeding difficulty score was 0.62±0.43(range of 0-2). The highest feeding difficulty item was "patient require close supervision while feeding". The variables influencing the feeding difficulty was ADL(β=.312), cognitive function(β=-.172) which explained about 20.0% of total variance. The results suggest the need of developing feeding difficulty coping strategy according to dietary behavior phase, In addition, the development and testing the educational program for caregivers to help feeding difficulty of the elders with dementia in long-term facility are recommended.

붙임머리의 땋기 및 스킬 기법을 응용한 헤어디자인 연구

홍현화(Hyeonhwa Hong) 케이뷰티인학회 2021 케이뷰티인학회지 Vol.1 No.1

EPB 액츄에이터 하우징 강건화 구조 설계에 관한 연구

홍현화(Hyun-hwa Hong),민동준(Dong-joon Min),조치훈(Chi-hoon Jo),오병준(Byeong-jun Oh),권재현(Jae-hyun Kwon),공정현(Jung-hyun Kong),최수길(Su-Gil Choi) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11

노인군의 보행 동역학 저하가 발생하는 메커니즘 연구

홍현화(Hyunhwa Hong),박수경(Sukyung Park) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10

It is commonly known that the elderly show slower walking speed and walk inefficiently. However, few studies have demonstrated on the mechanism of these gait pattern changes. In this research, we examined whether the deteriorated gait dynamics of the elderly are influenced by leg stiffness. Seven young and six elderly subjects participated to the test. The subjects walked on a 12-m-long walkway at four different gait speeds. Kinetic and kinematic data were collected using force plates and motion capture cameras. To calculate the dynamic leg stiffness, we used existing damped compliant leg model. Model parameters were obtained by optimization that best fit the GRFs data. We observed that maximum leg stiffness of the elderly were significantly smaller, implying slower walking speed of the elderly might be due to the limited increase of leg stiffness. Also, correlation between single support phase duration and the oscillation period of the compliant model was smaller in the elderly group. This implies that due to aging effects, the elderly might not to take advantage of the resonance characteristic and walk less efficiently.