carbon nanotubes (cnts) are specific structures with valuable characteristics. in general, the structure of each nanotube is defined by a unique chiral vector. in this paper, different structures of short single-walled cnts are simulated and their mechanical properties are determined using finite element method. for this aim, a simple algorithm is presented which is able to model the geometry o...

abstract this study investigated the validity of processability theory proposed by pienemann (1998/2015) among iranian efl learners’ oral performance. the theory defines six procedural stages for learners in the process of second language acquisition. in order to conduct the study, 10 intermediate efl learners were selected based on their performance on oxford placement test. then, they partici...