introduction climate change is a change in the statistical distribution of weather patterns when it lasts for an extended period of time. climate change may refer to a change in average weather conditions, or in the time variation of weather around long-term average conditions. climate change is caused by factors such as biotic processes, variations in solar radiation received by earth, plate t...

introduction: work-related musculoskeleta ldisorders (wmsds) of upperlimbs (ul)in the last 35 years have become extremely widespread, reaching epidemiclevels, inalladv ancedindustrializedcountries. they are considered the main cause of disability, time off work, and requests for healthcare . method and materials: for detailed risk assessment, iso -11228-3 is the preferred method. it is recommen...

vibration from the operation of industrial implements can be harmful to the human body. these implements, such as the power tiller or hand tractor often used to till rice in northern iran, can vibrate the entire body or one part, particularly the hands. in this research, the transmissibility and effects of vibration from a mitsubishi power tiller of 7.7 hp and 2400 rpm on the operator’s health ...