Let G be a non-finite profinite group and let G− Setsdf be the canonical site of finite discrete G-sets. Then the category R G, defined by Devinatz and Hopkins, is the category obtained by considering G− Setsdf together with the profinite G-space G itself, with morphisms being continuous G-equivariant maps. We show that R G is a site when equipped with the pretopology of epimorphic covers. Also...

No doubt that the scope of vocabulary in teaching/learning English is a primary goal. Dynamic Assessment (DA) serving as both instructional and evaluative device has opened new horizons for vocabulary teaching and assessment. This study, having taken the concept of Zone of Proximal Development (ZPD), will meticulously dig into mediated-oriented teaching and assessment. Accordingly, this study w...

We study the action of the mapping class group of an oriented genus g surface Sg,n with n punctures on a Poisson algebra which arises in the combinatorial description of Chern-Simons gauge theory on R × Sg,n when the gauge group is a semidirect product G ⋉ g . We prove that the mapping class group acts on this algebra via Poisson isomorphisms and express the action of Dehn twists in terms of an...

An interactive music instrument museum experience for children of 10-12 years is presented. Equipped with tablet devices, the children are sent on a treasure hunt where participants have to identify musical instruments by listening to samples; when the right instrument is located, a challenge of playing an application on the tablet is initiated. This application is an interactive digital repres...

Considering the paramount importance of writing logical arguments for college students, this study investigated the effect of dynamic assessment (DA) of Toulmin model through teacher- and collective-scaffolding on argument structure and overall quality of argumentative essays of Iranian EFL university learners. In so doing, 45 male and female Iranian EFL learners taking part in the study were r...