16,635 research outputs found
Higher Gauge Theory and Gravity in (2+1) Dimensions
Non-abelian higher gauge theory has recently emerged as a generalization of
standard gauge theory to higher dimensional (2-dimensional in the present
context) connection forms, and as such, it has been successfully applied to the
non-abelian generalizations of the Yang-Mills theory and 2-form
electrodynamics. (2+1)-dimensional gravity, on the other hand, has been a
fertile testing ground for many concepts related to classical and quantum
gravity, and it is therefore only natural to investigate whether we can find an
application of higher gauge theory in this latter context. In the present paper
we investigate the possibility of applying the formalism of higher gauge theory
to gravity in (2+1) dimensions, and we show that a nontrivial model of
(2+1)-dimensional gravity coupled to scalar and tensorial matter fields - the
model - can be formulated both as a standard gauge theory and
as a higher gauge theory. Since the model has a very rich structure - it admits
as solutions black-hole BTZ-like geometries, particle-like geometries as well
as Robertson-Friedman-Walker cosmological-like expanding geometries - this
opens a wide perspective for higher gauge theory to be tested and understood in
a relevant gravitational context. Additionally, it offers the possibility of
studying gravity in (2+1) dimensions coupled to matter in an entirely new
framework.Comment: 22 page
Process for purification of silicon
The purification of metallurgically pure silicon having a silicon content of more than 95% by weight is accomplished by leaching with an acidic solution which substantially does not attack silicon. A mechanical treatment leading to continuous particle size reduction of the granulated silicon to be purified is combined with the chemical purification step
There\u27s a light shining bright : in the window to-night
https://digitalcommons.library.umaine.edu/mmb-vp/4560/thumbnail.jp
Radial-breathing-like phonon modes of double-walled carbon nanotubes
The radial-breathing-like phonon modes (RBLMs) of the double-walled carbon
nanotubes are studied in a simple analytical model, in which the interaction
force constants (FCs) can be obtained analytically from the continuous model.
The RBLMs frequencies are obtained by solving the dynamical matrix, and their
relationship with the tube radii can be obtained analytically, offering a
powerful experimental tool for determining precisely the radii of the
multi-walled carbon nanotubes
Let\u27s Grow Old Together, Honey
https://digitalcommons.library.umaine.edu/mmb-vp/6025/thumbnail.jp
NT 510 The Gospel of Matthew
A- The Bible- (Wow that\u27s a surprise :)Revised Standard Version is preferred B- Robert A. Traina, Methodical Bible Study (Grand Rapids, MI: Francis Asbury Press,1980) C- David L. Thompson, Bible Study That Works (Hereafter: BSTW) Revised edition. (Nappanee, IN: Evangel Press, 1994). D- David R. Bauer, Biblical Resources for Ministry: A Bibliography of Works in Biblical Studies, (Hereafter: BRM), 2d ed. (Nappanee, Illinois: Evangel Publishing House, 1995).https://place.asburyseminary.edu/syllabi/3378/thumbnail.jp
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