Comparative Analysis of Integrated Filtering Methods Using UWB Localization in Indoor Environment.

This research delves into advancing an ultra-wideband (UWB) localization system through the integration of filtering technologies (moving average (MVG), Kalman filter (KF), extended Kalman filter (EKF)) with a low-pass filter (LPF). We investigated new approaches to enhance the precision and reduce noise of the current filtering methods-MVG, KF, and EKF. Using a TurtleBot robotic platform with a camera, our research thoroughly examines the UWB system in various trajectory situations (square, circular, and free paths with 2 m, 2.2 m, and 5 m distances). Particularly in the square path trajectory with the lowest root mean square error (RMSE) values (40.22 mm on the X axis, and 78.71 mm on the Y axis), the extended Kalman filter with low-pass filter (EKF + LPF) shows notable accuracy. This filter stands out among the others. Furthermore, we find that integrated method using LPF outperforms MVG, KF, and EKF consistently, reducing the mean absolute error (MAE) to 3.39% for square paths, 4.21% for circular paths, and 6.16% for free paths. This study highlights the effectiveness of EKF + LPF for accurate indoor localization for UWB systems.

The Effects of Workplace Loneliness on the Psychological Detachment and Emotional Exhaustion of Hotel Employees.

This study was aimed at establishing whether loneliness among hotel employees in the workplace affects their psychological and emotional experiences by empirically investigating their perceptions of negative situations. A self-administered questionnaire was distributed to 300 hotel employees, after which confirmatory factor analysis was conducted to reassess the reliability and validity of the measured questionnaire items. A model of workplace loneliness, psychological detachment, and emotional exhaustion was developed and examined through structural equation modeling. The results showed that the hotel employees experienced workplace loneliness and expressed a desire to be psychologically detached from their jobs for recovery. Workplace loneliness also contributed to emotional exhaustion. Theoretical and practical implications, as well as limitations and future research directions, are discussed.