45,567 research outputs found
Electronic amplifier with power supply switching Patent
Increasing power conversion efficiency of electronic amplifiers by power supply switchin
Statement of Andrew M. Kramer on Behalf of the Management Lawyers Working Group Before the Commission on the Future of Worker-Management Relations
Testimony_Kramer_090894.pdf: 276 downloads, before Oct. 1, 2020
One Big Thing: Suffering as the Path to New Life in Crime and Punishment
After spending a whole semester reading and thinking about Dostoevsky, the main thing that has struck me about him is his treatment of the theme of suffering. Despite, and even through, his extremely complicated characters and events, he nevertheless focuses his novels, particularly Crime and Punishment, on presenting a nuanced yet unified picture of suffering. After a brief analysis of several of the relevant characters and plot points, his thoughts on what suffering does to and for the individual will be presented. In contrast to our culture’s almost idolization of suffering as an experience which gives one instant respect, authority, and a platform, Dostoevsky’s perspective is honest, informed, pragmatic, and thoroughly Christian
Spherical Orbifolds for Cosmic Topology
Harmonic analysis is a tool to infer cosmic topology from the measured
astrophysical cosmic microwave background CMB radiation. For overall positive
curvature, Platonic spherical manifolds are candidates for this analysis. We
combine the specific point symmetry of the Platonic manifolds with their deck
transformations. This analysis in topology leads from manifolds to orbifolds.
We discuss the deck transformations of the orbifolds and give eigenmodes for
the harmonic analysis as linear combinations of Wigner polynomials on the
3-sphere. These provide new tools for detecting cosmic topology from the CMB
radiation.Comment: 17 pages, 9 figures. arXiv admin note: substantial text overlap with
arXiv:1011.427
Surface structure of i-Al(68)Pd(23)Mn(9): An analysis based on the T*(2F) tiling decorated by Bergman polytopes
A Fibonacci-like terrace structure along a 5fold axis of i-Al(68)Pd(23)Mn(9)
monograins has been observed by T.M. Schaub et al. with scanning tunnelling
microscopy (STM). In the planes of the terraces they see patterns of dark
pentagonal holes. These holes are well oriented both within and among terraces.
In one of 11 planes Schaub et al. obtain the autocorrelation function of the
hole pattern. We interpret these experimental findings in terms of the
Katz-Gratias-de Boisseu-Elser model. Following the suggestion of Elser that the
Bergman clusters are the dominant motive of this model, we decorate the tiling
T*(2F) by the Bergman polytopes only. The tiling T*(2F) allows us to use the
powerful tools of the projection techniques. The Bergman polytopes can be
easily replaced by the Mackay polytopes as the decoration objects. We derive a
picture of ``geared'' layers of Bergman polytopes from the projection
techniques as well as from a huge patch. Under the assumption that no surface
reconstruction takes place, this picture explains the Fibonacci-sequence of the
step heights as well as the related structure in the terraces qualitatively and
to certain extent even quantitatively. Furthermore, this layer-picture requires
that the polytopes are cut in order to allow for the observed step heights. We
conclude that Bergman or Mackay clusters have to be considered as geometric
building blocks of the i-AlPdMn structure rather than as energetically stable
entities
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