Background and Objectives: Considering that musculoskeletal disorders and occupational stress are one of the most important reasons for disability, physical and mental problems in the staff, the study of their causes is of great importance. Therefore, this study was conducted to investigate the relationship between ergonomic risk level and job stress in employees of a food production plant.  M...

Introduction: Parkinson's is a progressive disease of the nervous system that by effect on the body movements has affected to quality of patient life. in finally, daily tasks such as eating are difficult and time consuming for them. aim of the study, that was improve the comfort situation of Parkinson patient by identified ergonomic problems when eating, and designing product for this. Materia...

Introduction: The importance of product design has been dramatically increased in recent years due to economic considerations as well as changes in user preferences, policy making and legal needs. In response to this, and as one of the most influential branches in the field of product design (in terms of the fit between product and user), ergonomics has also been developed proportionally. The a...

Introduction: The subject of this research is having healthy air and its challenge is air purification to have this type of air. Healthy air is free of any pollutants, including odors, harmful gasses, dust, and viruses, especially corona. This healthy air is provided by a purifier device. One of the problems of metropolises is the lack of healthy air, which is one of the most important human ne...