The median of Iran population is much younger than many developed countries. This has impacts on the overall transportation behavior of the society.  In this research it is found that there is a significant Pearson correlation (-0.765) between median age and fatalities in different countries of the world. A questionnaire is developed to analyze the importance of various factors in choosing mode...

Introduction: Different approaches had identified different explanations about the causes mental diseases incidence. The biological and psychological approaches believe that it is a physiological stressful conditions or childhood experiences. Whereas, the sociological schools believe that the main factor of these diseases are unequal social structures, social roles, absence of social suppo...