The free trade system is going to reduce the tariffs and remove the non-tariffs barriers that WTO undertakes to do them. Some imported products have problems with regard to safety and health and importing countries are concerned that the entrance of such products to their territories will danger public health. These concerns may be as result of public opinion and concerns that may have a scie...

Joy and happiness has always been as one of the most important needs of students and teachers at schools. Studies have shown that physical factors, management, and relationships at school are involved in creating happiness in teachers and students. In the present study, our main focus is on the physical aspect of schools, which should be in accordance with the standards of education, according...