Search results for "bibliography"
showing 10 items of 194 documents
Chiral perturbation theory: Introduction and recent results in the one-nucleon sector
2009
We provide an introduction to the basic concepts of chiral perturbation theory and discuss some recent developments in the manifestly Lorentz-invariant formulation of the one-nucleon sector.
Meson dominance of hadron form factors and large-Ncphenomenology
2012
We discuss the pion and nucleon form factors and generalized form factors within the large-Nc approach in the space-like region. We estimate their theoretical uncertainties through the use of the half-width rule, amounting to taking the half-width of the resonances as the deviation of their mass parameters. The approach embodies the meson dominance of form factors and the high-energy constraints from perturbative QCD. We compare the results with the available experimental data and lattice simulations. The meson-dominance form factors are generally comparable to the available experimental data within the half-width-rule uncertainties. Our errors are comparable to the experimental uncertainti…
GENERALIZED PARTON DISTRIBUTIONS AND COMPOSITE CONSTITUENT QUARKS
2003
An approach is proposed to calculate Generalized Parton Distributions (GPDs) in a Constituent Quark Model (CQM) scenario, considering the constituent quarks as complex systems. The GPDs are obtained from the wave functions of the non relativistic CQM of Isgur and Karl, convoluted with the GPDs of the constituent quarks themselves. The latter are modelled by using the structure functions of the constituent quark, the double distribution representation of GPDs, and a recently proposed phenomenological constituent quark form factor. The present approach permits to access a kinematical range corresponding to both the DGLAP and the ERBL regions, for small values of the momentum transfer and of t…
Constraining models with vector-like fermions from FCNC in K and B physics
2001
In this work, we update the constraints on tree level FCNC couplings in the framework of a theory with n isosinglet vector-like down quarks. In this context, we emphasize the sensitivity of the B -> J/psi K_S CP asymmetry to the presence of new vector-like down quarks. This CP asymmetry, together with the rare decays B -> X_{s,d} l bar{l} and K -> pi nu bar{nu} are the best options to further constrain the FCNC tree level couplings or even to point out, in the near future, the possible presence of vector-like quarks in the low energy spectrum, as suggested by GUT theories or models of large extra dimensions at the TeV scale.
Fractal dimension of superfluid turbulence : A random-walk toy model
2021
This paper deals with the fractal dimension of a superfluid vortex tangle. It extends a previous model [J. Phys. A: Math. Theor. {\bf 43}, 205501 (2010)] (which was proposed for very low temperature), and it proposes an alternative random walk toy model, which is valid also for finite temperature. This random walk model combines a recent Nemirovskii's proposal, and a simple modelization of a self-similar structure of vortex loops (mimicking the geometry of the loops of several sizes which compose the tangle). The fractal dimension of the vortex tangle is then related to the exponents describing how the vortex energy per unit length changes with the length scales, for which we take recent pr…
Embedded students? Can libraries benefit from students having work placements in the library in planning library instruction?
2019
This article discusses how students can be more integrated in developing library instruction and what advantages that can provide for librarians planning their teaching. The students seem to have a different starting point as to how important the librarians’ knowledge of the subject at hand is and whether or not library instruction should be an integrated part of the course.
Publishing studies
2015
In some parts of the world, Publishing Studies are a fairly well-established field of research as well as of higher education. Not least since this is not so much the case in continental Europe, the Publishing Studies community increasingly sees a more elaborated self-concept as an important prerequisite for a prosperous further development of the field in research as well as in teaching. This paper starts off by relating the question for an advanced self-concept of Publishing Studies to the question what criteria have to be fulfilled to call a field (like Publishing Studies) a scholarly discipline. As the second source for the possible formation of a more elaborate self-concept, the paper …
Análisis de la productividad científica y visibilidad de las publicaciones sobre usabilidad (1971-2005)
2009
13 páginas, 5 tablas, 1 figura.
Análisis bibliométrico de la producción científica de la Universidad Politécnica de Valencia 1973-2001
2006
Se presenta la proyección de la Universidad Politécnica de Valencia mediante el análisis de su producción científica desde 1973 hasta 2001 inclusive, a partir de los artículos de revista y las comunicaciones a congresos disponibles en las principales bases de datos nacionales e internacionales. Se ha analizado la productividad y distribución temporal, por tipo de documento y por idioma, así como la producción científica por autores y por departamentos, identificando los más productivos. Por otro lado, se ha estudiado la distribución y evolución de la literatura científica, indicando aquellas revistas más utilizadas. Los resultados indican, como aspectos más relevantes, una amplia gama de ár…
Pesquisa de enfermagem e modelos de citação bibliográfica
2009
Esta investigación se centra en el análisis de la forma de publicar de las revistas de enfermería. Se analizan básicamente dos modelos, el modelo Vancouver, promovido por el Comité Internacional de Editores de Revistas Médicas, y el modelo APA, de la Asociación Norteamericana de Psicología. Se discuten sus ventajas e inconvenientes. A la vista de cómo se publica en la actualidad y de cómo se juzga la investigación, se propone que las revistas de enfermería adopten su propio modelo, independientemente de cómo publican los profesionales de la medicina. Esta pesquisa concentra-se na análise de como os jornais de enfermagem publicam os seus artigos. Basicamente, dois modelos são analisados, o V…