1,067 research outputs found
Exploring Art Student Teachersâ Fictions of Teaching: Strategies for Teacher Educators
Using portions of my research involving three art student teachers, I provide suggestions for strategies to examine preservice art student teachersâ fictions about teaching (art). First, I begin by briefly introducing my three participants and listing my research methods. Next, I describe three of the most common teaching fictions I found through analyzation of the data. I discuss the productive usefulness, as well as a few procedures, of employing visual culture as a catalyst for unfolding student teachersâ (un)conscious pedagogical fictions. Then, I describe how creating illustrations of the self as art teacher can further help explore fictions of teaching. Lastly, I end by discussing how important it is to have a supportive space to talk and theorize with student teachers about their continuous processes of identity (re)formation and to work through the anxieties of the profession of teaching art
Smeared Gauge Fixing
We present a new method of gauge fixing to standard lattice Landau gauge, Max
Re Tr , in which the link configuration is recursively
smeared; these smeared links are then gauge fixed by standard extremization.
The resulting gauge transformation is simultaneously applied to the original
links. Following this preconditioning, the links are gauge fixed again as
usual. This method is free of Gribov copies, and we find that for physical
parameters ( in SU(2)), it generally results in the gauge fixed
configuration with the globally maximal trace. This method is a general
technique for finding a unique minimum to global optimization problems.Comment: 3 pages, 4 PostScript figures; Poster presented at LAT9
Aspects of Confinement and Chiral Dynamics in 2-d QED at Finite Temperature
We evaluate the Polyakov loop and string tension at zero and finite
temperature in Using bozonization the problem is reduced to solving
the Schr\"odinger equation with a particular potential determined by the ground
state. In the presence of two sources of opposite charges the vacuum angle
parameter changes by , independent of the number of
flavors. This, in turn, alters the chiral condensate. Particularly, in the one
flavor case through a simple computer algorithm, we explore the chiral dynamics
of a heavy fermion.Comment: 4 pages, 2 ps files, uses sprocl.sty. To appear in Proceedings of
DPF96 (August, Minnesota
Representations of the -algebra and the loop representation in -dimensions
We consider the phase-space of Yang-Mills on a cylindrical space-time () and the associated algebra of gauge-invariant functions, the
-variables. We solve the Mandelstam identities both classically and
quantum-mechanically by considering the -variables as functions of the
eigenvalues of the holonomy and their associated momenta. It is shown that
there are two inequivalent representations of the quantum -algebra. Then we
compare this reduced phase space approach to Dirac quantization and find it to
give essentially equivalent results. We proceed to define a loop representation
in each of these two cases. One of these loop representations (for ) is
more or less equivalent to the usual loop representation.Comment: 15 pages, LaTeX, 1 postscript figure included, uses epsf.sty,
G\"oteborg ITP 93-3
Confinement and Chiral Dynamics in the Multi-flavor Schwinger Model
Two-dimensional QED with flavor fermions is solved at zero and finite
temperature with arbitrary fermion masses to explore QCD physics such as chiral
condensate and string tension. The problem is reduced to solving a
Schr\"odinger equation for degrees of freedom with a specific potential
determined by the ground state of the Schr\"odinger problem itself.Comment: 9 pages. 3 ps files and sprocl.sty attached. To appear in the
Proceedings of the QCD 96 workshop (March, Minnesota
Three topics in the Schwinger model
1. We compare Monte Carlo results with analytic predictions for the fermion
condensate, in the massive one-flavour Schwinger model. 2. We illustrate on the
Schwinger model how to facilitate transitions between topological sectors by a
simple reweighting method. 3. We discuss exact, non-perturbative improvement of
the gauge sector.Comment: Three-page contribution to Lat '97 by A.J. van der Sijs. Colourful
typo (IR -> UV) correcte
Element-centric clustering comparison unifies overlaps and hierarchy
Clustering is one of the most universal approaches for understanding complex
data. A pivotal aspect of clustering analysis is quantitatively comparing
clusterings; clustering comparison is the basis for many tasks such as
clustering evaluation, consensus clustering, and tracking the temporal
evolution of clusters. In particular, the extrinsic evaluation of clustering
methods requires comparing the uncovered clusterings to planted clusterings or
known metadata. Yet, as we demonstrate, existing clustering comparison measures
have critical biases which undermine their usefulness, and no measure
accommodates both overlapping and hierarchical clusterings. Here we unify the
comparison of disjoint, overlapping, and hierarchically structured clusterings
by proposing a new element-centric framework: elements are compared based on
the relationships induced by the cluster structure, as opposed to the
traditional cluster-centric philosophy. We demonstrate that, in contrast to
standard clustering similarity measures, our framework does not suffer from
critical biases and naturally provides unique insights into how the clusterings
differ. We illustrate the strengths of our framework by revealing new insights
into the organization of clusters in two applications: the improved
classification of schizophrenia based on the overlapping and hierarchical
community structure of fMRI brain networks, and the disentanglement of various
social homophily factors in Facebook social networks. The universality of
clustering suggests far-reaching impact of our framework throughout all areas
of science
Renormal-order improvement of the Schwinger mass
The massive Schwinger model may be analysed by a perturbation expansion in
the fermion mass. However, the results of this mass perturbation theory are
sensible only for sufficiently small fermion mass. By performing a
renormal-ordering, we arrive at a chiral perturbation expansion where the
expansion parameter remains small even for large fermion mass. We use this
renormal-ordered chiral perturbation theory for a computation of the Schwinger
mass and compare our results with lattice computations.Comment: Latex file, 13 pages, 3 figures, needed macro: psbox.te
Magnetic moment interaction in the anyon superconductor
Magnetic moment interaction is shown to play a defining role in the magnetic
properties of anyon superconductors. The necessary condition for the existence
of the Meissner effect is found.Comment: 4 pages, Revtex, to appear in Phys. Rev. B, corrected typo
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