objecitve: there have been contradictory findings on the relationship between socioeconomic status (ses) and child development although a wide range of results indicates that ses is associated with child development outcomes. the present study intended to define the relationship between ses and child development in tehran kindergartens. methods: this cross-sectional survey studied 1036 children...

introduction: pulmonary tuberculosis is major problem worldwide and it is estimated one third the world population are already infected and each year 9 million people develop full blown tuberculosis of these 3 million die of the disease, annually. delay in diagnosis and treatment are major problems that play a significant role in all aspect of the disease from patient treatment to transmission ...

Knowledge of the timing incubation period in plant and maturation vector are crucial our understanding born viral diseases design appropriate prevention. In this paper, we have formulated a model on dynamics for Cassava Mosaic considering vectors as time delay factors. The mathematical includes susceptible vectors, infected healthy plant, populations. Depending system parameters, identify condi...