Association between Sleep Duration and Injury from Falling among Older Adults:A Cross-Sectional Analysis of Korean Community Health Survey Data

Purpose: While sleeping problems increase with advancing age, there are inherent differences in sleep between males and females. Previous studies have shown inconsistent results of the relationship between sleep duration and risk of injury from falling. While controlling various sociodemographic and health-related factors, national representative data were used in order to analyze the association between sleep duration and injury from falling among older adults. Materials and Methods: The data were obtained from the Korean Community Health Survey of 2011. A total of 55654 individuals aged 65 years and older participated in the study. Multivariable logistic regression analysis was conducted to identify the factors associated with injury from falling. Results: After adjusting for covariates, such as age, sex, marital status, whether or not an individual is a recipient of benefits from the National Basic Livelihood Act, hypertension, diabetes mellitus, dyslipidemia, stress level, and self-rated health status, those who slept five hours or less per day [odds ratio (OR)=1.26; 95% confidence interval (CI)=1.18–1.34; p<0.001] or eight hours or more per day (OR=1.11; 95% CI=1.04–1.17; p=0.001) presented significantly higher ORs for injury from falling. A similar result was found when we conducted stratification by sex. Conclusion: The current study supports that there is a relationship between short sleep duration and injury from falling and also identified a marginal risk of long sleep in older adults. Therefore, sleep management in older adults with inadequate sleep duration may be necessary

Evaluation of Electromagnetic Exposure in Wireless Power Transfer Systems for Electric Vehicles

In wireless power transfer (WPT) systems, the electromagnetic fields generated by a charging module may exceed the limits set by international safety guidelines. This is a matter of concern for the safety of users of high-power WPT systems, such as electric vehicles (EVs). To address this issue, this study designed a stationary WPT system for EV charging. Furthermore, the dosimetry of the system was evaluated for two exposure scenarios. Electromagnetic field data obtained using the electromagnetic field analysis tool were employed to derive the induced quantities in the human body using the impedance method. In addition, the obtained results were compared to the values recommended by international guidelines (International Commission on Non-Ionizing Radiation Protection)

The Ninth Visual Object Tracking VOT2021 Challenge Results

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The elderly and falls: Factors associated with quality of life A cross-sectional study using large-scale national data in Korea

Objective: To investigate the factors of fall injury and measuring the relationship between health-related quality of life in the elderly. Methods: We analyzed the data on 38,627 persons of aged 65 years or older who have experienced falls drawn from the Korean Community Health Survey 2011. Binomial logistic regression analysis was performed with crude and adjusted odds ratios and 95% confidence intervals. Results: It was found that sex (OR: 1.187), types of household (OR: 1.134), employment status (OR: 0.941), stress (OR: 1.260), comorbidities (OR: 1.308), and health-related quality of life were significantly related to falls among the elderly. Specifically, elderly women, greater stress, comorbidities, and poor health-related quality of life were strongly related to higher odds of falls. Conclusion: Health-related quality of life was significantly related with the risk of fall injuries in elderly households. Providing support for informal caregivers (e.g., friends or neighbors), not only family members could expect to positive effect