BertsoBot: lehen urratsak

[EU]Hizkuntzaren prozesamenduko teknikak erabilita, poesia-sorkuntza automatikoan lehen urratsak eman dira. Hau erdiesteko, corpusen prozesamenduan oinarritutako bilaketak erabili dira, bai bilaketa arruntak eta baita bilaketa semantiko aurreratuak ere, horretarako IXA taldean garatutako tresna ezberdinak erabiliaz. Hizkuntza poetikoko testuek, gramatikaltasun eta metrika hertsitik haratago, semantika eta pragmatika barneratuta dituzte. Lan honetan semantikaren auziari heldu zaio nagusiki.

Higher order vortex gyrotropic modes in circular ferromagnetic nanodots

Magnetic vortex that consists of an in-plane curling magnetization configuration and a needle-like core region with out-of-plane magnetization is known to be the ground state of geometrically confined submicron soft magnetic elements. Here magnetodynamics of relatively thick (50-100 nm) circular Ni80Fe20 dots were probed by broadband ferromagnetic resonance in the absence of external magnetic field. Spin excitation modes related to the thickness dependent vortex core gyrotropic dynamics were detected experimentally in the gigahertz frequency range. Both analytical theory and micromagnetic simulations revealed that these exchange dominated modes are flexure oscillations of the vortex core string with n = 0,1,2 nodes along the dot thickness. The intensity of the mode with n = 1 depends significantly on both dot thickness and diameter and in some cases is higher than the one of the uniform mode with n = 0. This opens promising perspectives in the area of spin transfer torque oscillators.

Calibrating Analytical Models for Semilocal Strings

In this work we calibrate two different analytic models of semilocal strings by constraining the values of their free parameters. In order to do so, we use data obtained from the largest and most accurate field theory simulations of semilocal strings to date, and compare several key properties with the predictions of the models. As this is still work in progress, we present some preliminary results together with descriptions of the methodology we are using in the characterisation of semilocal string networks.