93 research outputs found
Co-Constructing Writing Knowledge: Students’ Collaborative Talk Across Contexts
Although compositionists recognize that student talk plays an important role in learning to write, there is limited understanding of how students use conversational moves to collaboratively build knowledge about writing across contexts. This article reports on a study of focus group conversations involving first-year students in a cohort program. Our analysis identified two patterns of group conversation among students: “co-telling” and “co-constructing,” with the latter leading to more complex writing knowledge. We also used Beaufort’s domains of writing knowledge to examine how co-constructing conversations supported students in abstracting knowledge beyond a single classroom context and in negotiating local constraints. Our findings suggest that co-constructing is a valuable process that invites students to do the necessary work of remaking their knowledge for local use. Ultimately, our analysis of the role of student conversation in the construction of writing knowledge contributes to our understanding of the myriad activities that surround transfer of learning
Constructing topological models by symmetrization: A PEPS study
Symmetrization of topologically ordered wavefunctions is a powerful method
for constructing new topological models. Here, we study wavefunctions obtained
by symmetrizing quantum double models of a group in the Projected Entangled
Pair States (PEPS) formalism. We show that symmetrization naturally gives rise
to a larger symmetry group which is always non-abelian. We prove
that by symmetrizing on sufficiently large blocks, one can always construct
wavefunctions in the same phase as the double model of . In order to
understand the effect of symmetrization on smaller patches, we carry out
numerical studies for the toric code model, where we find strong evidence that
symmetrizing on individual spins gives rise to a critical model which is at the
phase transitions of two inequivalent toric codes, obtained by anyon
condensation from the double model of .Comment: 10 pages. v2: accepted versio
2012 ACCF/AHA/ACP/AATS/PCNA/SCAI/STS guideline for the diagnosis and management of patients with stable ischemic heart disease
The recommendations listed in this document are, whenever possible, evidence based. An extensive evidence review was conducted as the document was compiled through December 2008. Repeated literature searches were performed by the guideline development staff and writing committee members as new issues were considered. New clinical trials published in peer-reviewed journals and articles through December 2011 were also reviewed and incorporated when relevant. Furthermore, because of the extended development time period for this guideline, peer review comments indicated that the sections focused on imaging technologies required additional updating, which occurred during 2011. Therefore, the evidence review for the imaging sections includes published literature through December 2011
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