• 근관절건강학회지
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• 제21권1호
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• pp.11-18
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• 2014

Purpose: The purpose of this study was to understand care workers' fall-related knowledge and caring behaviors for fall prevention in nursing home. Methods: This study was a descriptive survey study. Data have been collected from 125 care workers in 5 nursing homes. Data were analyzed using frequency, t-test, one-way analysis of variance (ANOVA), and Pearson correlation coefficients. Results: 1) The average percentage of correct answers for care workers' fall-related knowledge was 72.2%. There were significant differences in fall-related knowledge by age, experiences of re-education about care for fall injuries, and experiences to transfer fall patients to another hospital. 2) The average level of care workers' caring behaviors for fall prevention was 3.81 points out of 4. There were significant differences by experiences of education about care for fall injuries in nursing home and concern of fall injury prevention. 3) There was a significant correlation between fall-related knowledge and caring behaviors for fall prevention (r=.320, p<.001). Conclusion: The level of fall-related knowledge is positively correlated to the level of caring behaviors for fall prevention. Therefore, nurses should prepare education programs to increase care workers' fall-related knowledge and caring behaviors for fall prevention.

• 근관절건강학회지
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• 제23권1호
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• pp.28-38
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• 2016

Purpose: The purpose of this study was to investigate post-burn itching relevant characteristics in the rehabilitation phase. Methods: Ninety four burn patients who were hospitalized in the rehabilitation phase participated in the study. Self-reported Leuven itch scale-Korean was used to evaluate itching related characteristics. Data were analyzed with descriptive analysis, $x^2$ test, and Kruskal-Wallis test. Results: All subjects except two had the itching. Itching frequency revealed that 68.1% of subjects experienced itching one or more episodes a day or always, and 18.7% had episode durations lasting more than 2 hours per incidence. Mean severity and distress of itching was $5.3{\pm}2.4$ and $5.2{\pm}2.5$, respectively. Itching sensation dimension of tickling was 56.4%. More than 25% of subjects "often" or "always" affected reduced quality of life, loss of concentration, bad mood, and difficulty in falling asleep. Satisfaction with itching treatment was intermediate level. Conclusion: Post-burn itching in the rehabilitation phase was a significant problem despite pruritus treatment. Based on the finding of this study, development of comprehensive and tailored nursing intervention programs for itching could be suggested.

• 근관절건강학회지
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• 제28권2호
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• pp.130-139
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• 2021

Purpose: This study was conducted to identify factors affecting health behavior related to particulate matter (PM) of among nursing college students. Methods: A cross-sectional survey design was used. Data were collected from 261 volunteering nursing college students from three universities via an online survey. The survey questions measured PM risk perception, self-care agency, and health behavior related to PM. The study was conducted from June 22 to August 21, 2020. The data were analyzed using descriptive statistics, independent t-test, ANOVA, Pearson's correlation coefficient and multiple regression analysis. Results: The factor with the greatest influence on health behavior related to PM was PM risk perception, followed by self-care agency and the frequency of going out. These variables explained about 41% of the types of health behavior related to PM. Conclusion: PM risk perception and self-nursing agency were found to be significantly correlated with health behavior related to PM. This result suggests that there is a need to develop an educational program for nursing students to improve PM risk perception and self-nursing agency.

• 근관절건강학회지
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• 제30권3호
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• pp.189-196
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• 2023

Purpose: This study sought to identify factors affecting the health-related quality of life (HINT-8) of female seniors aged 65 years or older living alone after the COVID-19 pandemic. Methods: Raw data from the eighth third year (2021) National Health and Nutrition Examination Survey was used, and the total number of subjects was 379. Data analysis was performed using SPSS 22.0 program, employing complex sample frequency and percentages, t-tests, analyses of variance, and regression analyses, while a post-hoc test (Bonferroni correction) was performed to determine differences in health-related quality of life. Results: The results of the study showed that the study subjects' health-related quality of life differed significantly depending on activity restrictions, number of walking days, age at menopause, perceived stress, depression, generalized anxiety disorder, and subjective health. Most of the influencing factors were emotional factors such as perceived stress level, generalized anxiety disorder, and subjective health status carrying an explanatory power of 46%. Conclusion: The results of this study can be used as basic data to establish intervention strategies based on factors that affect the health-related quality of life for female seniors living alone.

• 근관절건강학회지
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• 제28권2호
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• pp.174-182
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• 2021

Purpose: This study is a secondary data analysis study to identify factors related to the quality of life of people aged 65 y or older, according household type. Methods: In 2019, the study extracted the data from the elderly participants (65 y of age or older) from G province Community Health Survey. The data were compiled and analyzed in a composite sample. Results: The quality of life was lowest among single people, grandparents-grandchildren (F=39.88, p<.001). Variables that significantly influenced quality of life in single-person households were basic security(β=-.03, p=.002), high-risk drinking (β=.04, p=.002), number of day to walk (β=.01, p<.001), diabetes mellitus (β=-.03, p<.001), depression (β=-.02, p<.001), and contact frequency (β=.00, p<.001). Variables that significantly influenced grandparents-grandchildren households were basic security (β=.03, p<.001), smoking(β=-.02, p<.001), number of day to walk (β=.00, p<.001), hypertension (β=-.01, p=.009), diabetes mellitus (β=-.04, p<.001), cognitive impairment (β=-.02, p<.001), depression(β=-.02, p<.001), contact frequency (β=.01, p<.001), and neighborhood trust (β=.02, p<.001). Conclusion: In this study, there were differences in health-related quality of life for each type of household, and various support systems are needed in their social networks to suit their characteristics.

• 한국전산구조공학회논문집
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• 제36권1호
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• pp.57-65
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• 2023

본 연구는 딥러닝을 위한 비선형 변환 접근법을 사용하여 Single-lap joint의 접착 영역을 조사하기 위한 진동 응답 기반 탐지 시스템을 제시한다. 산업 혹은 공학 분야에서 분해가 쉽지 않은 구조 내에 보이지 않는 부분의 상태와 접착된 구조의 접착 부위 상태를 알기 어려운 문제가 있다. 이러한 문제를 해결하기 위해 본 연구는 비선형 변환을 이용하여 기준 시편의 진동 응답으로 다양한 시편의 접착 면적을 조사하는 탐지 방법을 제안한다. 이 연구에서는 CNN 기반 딥러닝으로 진동 특성을 파악하기 위해 비선형 변환을 적용한 주파수 응답 함수를 사용했고 분류를 위해 가상의 스펙트로그램을 사용했다. 또한, 제시된 방법을 검증하기 위해 알루미늄, 탄소섬유복합재 그리고 초고분자량 폴리에틸렌 시편에 대한 진동 실험, 분석적 해, 유한요소해석을 수행했다.

• 한국수자원학회논문집
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• 제49권3호
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• pp.217-225
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• 2016

가뭄은 지속기간과 심도의 두 가지 변량으로 특징지어지는 수문사상이므로 가뭄 지속기간과 심도를 동시에 고려하는 이변량 가뭄빈도해석이 요구된다. 그러나 이변량 결합 확률분포는 3차원의 분포형태를 나타내어 실무에서 분석과 활용이 불편하다는 단점이 있다. 이를 보완하기 위해 본 연구에서는 코플라 함수를 활용하여 이변량 결합 확률분포함수를 추정한 후, 지속기간별 조건부 확률분포함수를 산정하였고, 비초과확률에 따른 임계심도를 결정하였다. 과거 극심했던 가뭄사상들을 바탕으로 95% 비초과확률에 해당하는 임계심도를 갖는 극한 가뭄사상에 대하여 수문학적 위험도를 산정하였다. 10개월 지속기간을 가지는 가뭄사상의 경우, 가뭄위험도가 가장 높은 지역은 광주, 인제, 울진으로 전국 평균에 비해 1.3-2.0배 높은 가뭄발생확률을 나타내었다. 또한, 남부지역이 중부와 북부지역보다 더 높은 가뭄 취약성을 갖는다는 것을 확인하였다.

• 소음진동
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• 제10권3호
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• pp.437-443
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• 2000

The optimal design problem for increasing dynamic stiffness using hybrid model which composed of original detailed BIW(body in white) and impinged beam elements is investigated. Using the characteristics of the beam elements and design sensitivity analysis this approach utilizes an optimization technique to determine the optimal section properties of beam elements. The constraint is to increase the first natural frequency by five percent compared with original one. The results show that the first torsion and bending natural frequencies are increased by five percent using hybrid model and optimization. These results indicate that this optimization method can be employed to enhance the dynamic stiffness of vehicle body structure in design concept stage.

• 대한인간공학회지
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• 제16권3호
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• pp.37-48
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• 1997

It is very common for women wear shoes with a high heel. It has been known that the high heel could disfigure the foot shape and cause various joint problems including back pain. However, few quantitative studies have been conducted. Therefore, in this study, the low back muscle has been investigated in order to find fatifue effect due to different heights of the heel. In particular, 0, 4, 6 and 8cm heel and two different shapes of heel have been used for an experiment. Ten healthy female subjects volunteered for the study. Isometric Trunk Exertion Frame(ITEF) and Electromyography were used to measure tha Median Frequency via Spectral analysis. The results indicated that the heel height significantly affected the local muscle fatigue of the back. After post hoc analysis, it was found that a proper heel height ougth to be lower than 5cm not to have severely fatigued back muscle after a casual walk for an hour. Such results could be applies to female industrial workers in order to prevent a cumulative trauma disorder of the back, and also to design a female dress shoes minimizing low back fatigue.

• 한국전기전자재료학회논문지
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• 제25권9호
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• pp.686-691
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• 2012

In this paper, we designed a Chua's chaotic circuit using transcondcutor based nonlinear resistor. Proposed chaotic circuit consist of L, C, R and transcondcutor based Chua's diode. We performed SPICE simulation for chaotic dynamics such as time seriesform, frequency analysis and phase plane of the circuit. Chaotic dynamics of the circuit was analysed according to MOS size variation of the operational transconductance amplifier. Also, we performed SPICE circuit analysis for temperature dependance of the circuit. SPICE results showed that chaotic dynamics of the circuit varied according to the temperature variation and chaotic signals were generated in specific temperature conditions.