Medición del valor de marca desde un enfoque formativo

[ES] Las empresas necesitan medir el valor de sus marcas para poder tomar las mejores decisiones tácticas y estratégicas relativas a estos activos intangibles. Es por ello que este trabajo desarrolla un instrumento de medida del valor de marca utilizando un enfoque formativo. A diferencia de investigaciones anteriores, este estudio propone un modelo formativo de orden superior y valida empíricamente dicha conceptualización en dos países, España y el Reino Unido.

Embedding quantum simulators

79 p.

One-dimensional potential for image-potential states on graphene

In the framework of dielectric theory, the static non-local self-energy of an electron near an ultra-thin polarizable layer has been calculated and applied to study binding energies of image-potential states near free-standing graphene. The corresponding series of eigenvalues and eigenfunctions have been obtained by numerically solving the one-dimensional Schrodinger equation. The imagepotential state wave functions accumulate most of their probability outside the slab. We find that the random phase approximation (RPA) for the nonlocal dielectric function yields a superior description for the potential inside the slab, but a simple Fermi-Thomas theory can be used to get a reasonable quasi-analytical approximation to the full RPA result that can be computed very economically. Binding energies of the image-potential states follow a pattern close to the Rydberg series for a perfect metal with the addition of intermediate states due to the added symmetry of the potential. The formalism only requires a minimal set of free parameters: the slab width and the electronic density. The theoretical calculations are compared with experimental results for the work function and image-potential states obtained by two-photon photoemission.