in the present study, modelling and vibration analysis of carbon nanotubes/ fiber/ polymer composite microplates are investigated. the governing equations of the carbon nanotubes/ fiber/ polymer composite microplates are derived based on first order shear deformation plate theory, rather than other plate theories, due to accuracy and simplicity of polynomial functions. the modified couple stres...

one of the main problems in the quality control of rivers is the high control cost imposed upon pollutant units. the cooperative policy approach in the treatment process between two or more pollutant units is a new and economic perspective in the environmental management of catchment basins. origins of large amounts pollutants which require a high cost to control pollution are trying to start p...

Background: The content of nutrition education and the process of behavioral change should be designed based on the principles of educational for achieving behavioral goals. This systematic study aimed to evaluate the effectiveness of nutrition interventions designed mainly by health educational and promotional theory and models. Methods: The PubMed, Science Direct, Scopus, and Cochrane databas...

this paper presents a mathematical model for the vibration analysis of a three-component piezoelectric force sensor. the cubic theory of weakly nonlinear electroelasticity is applied to the model for describing the electromechanical coupling effect in the piezoelectric sensing elements which operate in thickness-shear and thickness-stretch vibration modes. hamilton's principle is used to d...

for rethinking the anthony giddens’s theory on “reflection”, it is necessary to reconsider his general approach to social reality, and then, situating the concept of “reflection” in the context of his general approach. thus, three-steps will be studied in the article: first, structuration theory that is most important opposition in his social theory. then, giddens's notion of tradition and...