in the past couple of decades sociocultural theory of sla and its implications in efl contexts have attracted attentions of research circles worldwide and aroused some controversies. firth and wagner (1997) have questioned the principles of the cognitive view which gives importance to mental constructs in favor of sociocultural view which highlights social and contextual constructs. but if soci...

let h be a separable hilbert space and let b be the set of bessel sequences in h. by using several interesting results in operator theory we study some topological properties of frames and riesz bases by constructing a banach space structure on b. the convergence of a sequence of elements in b is de_ned and we determine whether important properties of the sequence is preserved under the con...

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Objective: Citizens have many rights and commitments. "Citizenship commitments" induce social order and make social affairs predictable. Such a concept due to its nature and meaning holds relation with entire subjects and debates of currently human and social fields. Method: This research is a survey on citizens over the age of 18 in Tehran city. Sampling method is compound of classified a...

Objective: Citizens have many rights and commitments. "Citizenship commitments" induce social order and make social affairs predictable. Such a concept due to its nature and meaning holds relation with entire subjects and debates of currently human and social fields. Method: This research is a survey on citizens over the age of 18 in Tehran city. Sampling method is compound of classified a...