2017 No https://pubmed.ncbi.nlm.nih.gov/28488107/ Shih, Wen-Mei Asia Observational Epidemiology Study Students Elementary (K-5) Temperature Humidity Thermal comfort Pet Sky view factor Long-term thermal perceptions During summer months, the physiological equivalent temperature (PET) of these outdoor spaces in over 60% of the daytime in summer between 10 a.m. and 4 p.m. was higher than 38 °C PET, indicating high heat stress. The results of occupants’ long-term perceptions of the thermal comfort of these spaces suggested that dissatisfaction with thermal comfort was associated more with solar radiation than with wind speed. Finally, this study simulated a campus environment where more trees are planted and compared the thermal comfort indices before and after the simulation. The results indicated that this solution contributed to a decrease in the PET of these environments, thereby alleviating high heat stress.