Using Kr and isotopic tracers to characterise old groundwater in the Bangkok metropolitan and vicinity areas.

Krypton-81 was applied to investigate the age of groundwater in the aquifer system in the Bangkok metropolitan and vicinity areas. Stable (H, O and C) and radioactive (H, Kr and C) isotopes and noble gases were applied in parallel. Low levels of C and significant radiogenic He confirm that groundwater in the deep aquifers is older than 30 ka.

A Survey of Attitudes and Training of Pediatric Dentistry Residents and Faculty in the United States Regarding the LGBTQ Patient Population.

The purpose of this study was to assess the knowledge, attitude, and training of pediatric dental residents and faculty on the management of patients who belong to the LGBTQ (lesbian, gay, bisexual, transgender, and queer) community. This cross-sectional survey included a 16-item questionnaire to assess the attitudes and training regarding the LGBTQ population, separately for pediatric dental residents and faculty across the United States. Statistical significance was set at the level of five percent, and data were analyzed using descriptive statistics, Wilcoxon rank-sum, and Fisher's exact tests.

Unravelling the Complexity of Irregular Shiftwork, Fatigue and Sleep Health for Commercial Drivers and the Associated Implications for Roadway Safety.

Fatigue can be a significant problem for commercial motor vehicle (CMV) drivers. The lifestyle of a long-haul CMV driver may include long and irregular work hours, inconsistent sleep schedules, poor eating and exercise habits, and mental and physical stress, all contributors to fatigue. Shiftwork is associated with lacking, restricted, and poor-quality sleep and variations in circadian rhythms, all shown to negatively affect driving performance through impaired in judgment and coordination, longer reaction times, and cognitive impairment.

Challenges in Conducting Empirical Epidemiological Research with Truck and Bus Drivers in Diverse Settings in North America.

Over 6.5 million commercial vehicle drivers were operating a large truck or bus in the United States in 2020. This career often has high stress and long working hours, with few opportunities for physical activity.

Developments of a field gas extraction device and krypton purification system for groundwater radio-krypton dating at the IAEA.

The long-lived radio-krypton isotope Kr (t = 2.29 × 10 yr) is an ideal tracer for old groundwater age dating in the range of 10-10 years which goes beyond the reach of radio-carbon (C) age dating. Analytical breakthrough made over the last two decades in Atom Trap Trace Analysis (ATTA) has enabled the use of this isotope with extremely low abundance (Kr/Kr = 6 × 10) to be used as a practical dating tool for very old groundwater.