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 $\Sigma\Phi EA$ 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