Wind is considered one of the most advantageous alternatives to fossil energy because of its low operating cost and extensive availability. However, alleged health-related effects of exposure to wind turbine (WT) noise have attracted much public attention and various symptoms, such as sleep disturbance, have been reported by residents living close to wind developments. Prospective cohort study with synchronous measurement of noise and sleep physiologic signals was conducted to explore the possibility of sleep disturbance in people hosting new industrial WTs in Ontario, Canada, using a pre and post-exposure design. Objective and subjective sleep data were collected through polysomnography (PSG), the gold standard diagnostic test, and sleep diary. Sixteen participants were studied before and after WT installation during two consecutive nights in their own bedrooms. Both audible and infrasound noises were also concurrently measured inside the bedroom of each participant. Different noise exposure parameters were calculated (LAeq, LZeq) and analyzed in relation to whole-night sleep parameters. Results obtained from PSG show that sleep parameters were not significantly changed after exposure. However, reported sleep qualities were significantly (P=0.008) worsened after exposure. Average noise levels during the exposure period were low to moderate and the mean of inside noise levels did not significantly change after exposure. The result of this study based on advanced sleep recording methodology together with extensive noise measurements in an ecologically valid setting cautiously suggests that there are no major changes in the sleep of participants who host new industrial WTs in their community. Further studies with a larger sample size and including comprehensive single-event analyses are warranted.

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Objectives: Any form of disability is considered a critical factor having significant effects on a family. Stress is the main result of such effects on parents. According to the classical procedure, the mothers play a major role as child caregiver, so they experience more stress than other members of the family. The goal of this study was to develop and assess the role of the de-stress training program in decreasing the stress of mothers of mentally disabled children. Methods:This study was a semi-experimental research with follow-up. The study sample included 20 mothers of children with mental disabled who live in Tehran. The parental stress scale was used for measuring mother's stress. Data was analyzed by univariate analysis of covariance. Results:The data presented a significant difference between the control and experiment groups. Also, the results did not show a significant difference between pre-test and follow-up, indicating a persistent effect of the training.Discussion: De-stress training program was found to significantly decrease the stress of mothers of mentally disabled children.