Zobrazeno 1 - 10
of 3 283
pro vyhledávání: '"A. ESPANYA"'
Autor:
Sánchez-Artús, Xavier, Subbiah, Buckle, Gracia, Vicente, Espino, Manuel, Grifoll, Manel, Espanya, Antoni, Sánchez-Arcilla, Agustín
Publikováno v:
In Coastal Engineering August 2024 191
Publikováno v:
Fortsch.Phys.55:573-578,2007
We give a brief review of the twistor string approach to supersymmetric Yang-Mills theories with an emphasis on the different formulations of (super)string models in supertwistor space and their superspace form. We discuss the classical equivalence a
Externí odkaz:
http://arxiv.org/abs/hep-th/0702133
We extend the Shirafuji model for massless particles with primary spacetime coordinates and composite four-momenta to a model for massive particles with spin and electric charge. The primary variables in the model are the spacetime four-vector, four
Externí odkaz:
http://arxiv.org/abs/hep-th/0702050
Publikováno v:
JHEP 0607:005,2006
The superspace formulation of the worldvolume action of twistor string models is considered. It is shown that for the Berkovits-Siegel closed twistor string such a formulation is provided by a N=4 twistor-like action of the tensionless superstring. A
Externí odkaz:
http://arxiv.org/abs/hep-th/0604037
Publikováno v:
Int.J.Mod.Phys.A21:4137-4160,2006
We extend the Shirafuji model for massless particles with primary spacetime coordinates and composite four-momenta to a model for massive particles with spin and electric charge. The primary variables in the model are the spacetime four-vector, four
Externí odkaz:
http://arxiv.org/abs/hep-th/0510266
Publikováno v:
Phys.Rev.D73:105011,2006
We consider a relativistic particle model in an enlarged relativistic phase space M^{18} = (X_\mu, P_\mu, \eta_\alpha, \oeta_\dalpha, \sigma_\alpha, \osigma_\dalpha, e, \phi), which is derived from the free two-twistor dynamics. The spin sector varia
Externí odkaz:
http://arxiv.org/abs/hep-th/0510161
We employ the modification of the basic Penrose formula in twistor theory, which allows to introduce commuting composite space-time coordinates. It appears that in the course of such modification the internal symmetry SU(2) of two-twistor system is b
Externí odkaz:
http://arxiv.org/abs/hep-th/0503134
Publikováno v:
Nucl.Phys. B706 (2005) 181-203
We use the additional variables of suitably enlarged superspaces to write new actions for extended objects, with kappa-symmetry, in such a way that the tension emerges from them as an integration constant. Our actions correspond to the spacetime scal
Externí odkaz:
http://arxiv.org/abs/hep-th/0407238
Publikováno v:
Phys.Lett. B595 (2004) 491-497
The sixteen real coordinates of two-twistor space are transformed by a nonlinear mapping into an enlarged space-time framework. The standard relativistic phase space of coordinates $(X_\mu, P_\mu)$ is supplemented by a six-parameter spin phase manifo
Externí odkaz:
http://arxiv.org/abs/hep-th/0405166
Nature based solutions for sediment starved deltas: the Ebro case in the Spanish Mediterranean coast
Autor:
A. SANCHEZ-ARCILLA, C. IBAÑEZ, V. GRACIA, L. GARROTE, I. CACERES, D. LOPEZ, J.M. DE LA PEÑA, N. CAIOLA, A. MUNNE, A. ESPANYA, A. IGLESIAS, A. ROVIRA, D.G. MARCO, J.M. GRASSA
Deltas in river regulated basins have become coastal vulnerability hotspots, for which traditional coastal engineering does not provide acceptable risk reductions. This is well illustrated by the Ebro delta (W Mediterranean) whose vulnerability is pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db379d287a0e566a805055ede75bdfed
https://hdl.handle.net/2117/385799
https://hdl.handle.net/2117/385799