Results 81 to 90 of about 2,437,992 (325)
The Restricted 3-Body Problem on S1 : regularization and a particular solution [PDF]
, 2007 We study a special case of the two body problem when the particles are restricted to move in the space S1. We regularize all collisions using a symplectic transformation and classify the trajectories in four families.
Franco Pérez, Luis +1 more
core
Removing Oxide Layers and Retaining Oxide‐Free Steel Surfaces by Polishing in Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.In this study, the efficacy of wet mechanical polishing under an oxygen‐free atmosphere for deoxidation and the retention of an oxide‐free steel surface are elucidated using X‐ray photoelectron spectroscopy. The methodology proved successful; however, the results were highly dependent on the preparation of the solvents used to clean the samples after ...
Friedrich Bürger +2 more
wiley +1 more source
Beta function without ultraviolet divergences
Journal of High Energy PhysicsIn this paper, we construct the beta function in the functorial formulation of two-dimensional quantum field theories (FQFT). A key feature of this approach is the absence of ultraviolet divergences.
Maxim Gritskov, Andrey Losev
doaj +1 more source
On infinitesimal conformal transformations with respect to the Cheeger-Gromoll metric
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2012 The present paper deals with the classification of infinitesimal fibre-preserving conformal transformations on the tangent bundle, equipped with the Cheeger-Gromoll ...
Gezer Aydin, Bilen Lokman
doaj +1 more source
Field dependent nilpotent symmetry for gauge theories
, 2012 We construct the field dependent mixed BRST (combination of BRST and anti-BRST) transformations for pure gauge theories. These are shown to be an exact nilpotent symmetry of both the effective action as well as the generating functional for certain ...
B.P. Mandal +28 more
core +1 more source
Advanced Engineering Materials, EarlyView.New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold +2 more
wiley +1 more source
Gauge transformations and symmetries of integrable systems
, 2008 We analyze several integrable systems in zero-curvature form within the framework of $SL(2,\R)$ invariant gauge theory. In the Drienfeld-Sokolov gauge we derive a two-parameter family of nonlinear evolution equations which as special cases include the ...
Ablowitz M J +22 more
core +1 more source
Advanced Engineering Materials, EarlyView.Cladding is a proven method that boosts the surface qualities of mechanical parts by applying a layer of more durable material over a base substrate. This work responds to the needs of offshore and pressure vessels sectors by focusing on cladding a super austenitic steel onto low‐carbon steel through gas tungsten arc welding.
E. J. da Cruz Junior +6 more
wiley +1 more source
Evolution of Tzitzeica hypersurfaces
Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2018 Our aim is to study the evolutions of Tzitzeica hypersurfaces which appear in understanding the dynamics of some geometric programming problems and reliability optimal allocation problems.
Constantin Udriste +2 more
doaj +1 more source