El jove Martin Heidegger i el concepte de temps exposat a Ésser i temps

Estudi elaborat a partir d’una estada a l’ Albert Ludwigs Universität, Alemanya, entre els mesos de maig i octubre del 2006.El tema del temps és extremadament important per a Martin Heidegger. I el seu pensament al respecte no pot ésser comprès adequadament si no tenim en compte la gran influència que diversos filòsofs hi van exercir. Aristòtil i Agustí són elsmés destacats, tal i com el propi Heidegger afirma a les seves lliçons marburgueses del semestre d’estiu de 1927. Sense elles, no es pot entendre el complex entramat terminològic ni les idees fonamentals sobre la temporalitat. Idees que apareixen publicades en diverses obres seves. El transfons filosòfic de cadascun d’aquests escrits és, en part, el concepte aristotèlic o Agustina de temps. Ésser i temps no és una obra que neixi del no res com a producte de la necessitat de l’autor de consolidar el seu currículum en vistes a una plaça docent, sinó que la publicació durant aquests darrers anys de les seves lliçons i altres escrits menors permeten observar com es va gestant la manera en que Heidegger entendrà el concepte de temps que es reflexa en aquest tractat, i que, com ja s’ha dit, es sustenta en les idees d’Aristòtil i d’Agustí al respecte. S’ha mostrat també de quina manera Heidegger porta a la pràctica la reconstrucció fenomenològica proposada pel que va ser el seu mentor, Husser, i com recondueix els conceptes fonamentals d’ambdós filòsofs, incorporant-los a la seva particular manera d’entendre el temps.

La crisis del drama en la contemporaneidad: Attempts on her life de Martin Crimp

Attempts on her life es una obra que desafía la posibilidad de su propia representación. El tratamiento del personaje; la ausencia de diálogo strictu sensu; una acción que se desarrolla en el relato de los locutores; espacio y tiempo que no acaban de definirse sino en el hic et nunc del espectáculo: todo esto convierte la obra de Crimp en parámetro ideal para detectar el estado de la llamada crisis del drama en la contemporaneidad. Este trabajo quiere centrarse en la relevancia que las características formales y de contenido de la obra cobran dentro del ámbito dramatúrgico y filosófico contemporáneos

Martin Heidegger

Nota biogràfica sobre el filòsof Martin Heidegger on es fa, per una banda, un breu repàs dels principals fets de la seva vida com a filòsof i, per una altra banda, un breu repàs de la seva obra

La incapacidad de amar en A pair of blue eyes de Thomas Hardy

A Pair of Blue Eyes ha estat considerada tradicionalment como el primer exemple de pessimisme i fatalisme en les novel·les de Hardy. Aquest treball pretén mostrar que la novel·la no segueix aquest patró, sinó que en base al model aristotèlic de catarsis, mostra l’ error que suposa seguir falsos models amorosos.

EGASP: the human ENCODE Genome Annotation Assessment Project

Background: We present the results of EGASP, a community experiment to assess the state-ofthe-art in genome annotation within the ENCODE regions, which span 1% of the human genomesequence. The experiment had two major goals: the assessment of the accuracy of computationalmethods to predict protein coding genes; and the overall assessment of the completeness of thecurrent human genome annotations as represented in the ENCODE regions. For thecomputational prediction assessment, eighteen groups contributed gene predictions. Weevaluated these submissions against each other based on a ‘reference set’ of annotationsgenerated as part of the GENCODE project. These annotations were not available to theprediction groups prior to the submission deadline, so that their predictions were blind and anexternal advisory committee could perform a fair assessment.Results: The best methods had at least one gene transcript correctly predicted for close to 70%of the annotated genes. Nevertheless, the multiple transcript accuracy, taking into accountalternative splicing, reached only approximately 40% to 50% accuracy. At the coding nucleotidelevel, the best programs reached an accuracy of 90% in both sensitivity and specificity. Programsrelying on mRNA and protein sequences were the most accurate in reproducing the manuallycurated annotations. Experimental validation shows that only a very small percentage (3.2%) of the selected 221 computationally predicted exons outside of the existing annotation could beverified.Conclusions: This is the first such experiment in human DNA, and we have followed thestandards established in a similar experiment, GASP1, in Drosophila melanogaster. We believe theresults presented here contribute to the value of ongoing large-scale annotation projects and shouldguide further experimental methods when being scaled up to the entire human genome sequence.

Iterated local search

Iterated Local Search has many of the desirable features of a metaheuristic: it is simple, easy to implement, robust, and highly effective. The essential idea of Iterated Local Search lies in focusing the search not on the full space of solutions but on a smaller subspace defined by the solutions that are locally optimal for a given optimization engine. The success of Iterated Local Search lies in the biased sampling of this set of local optima. How effective this approach turns out to be depends mainly on the choice of the local search, the perturbations, and the acceptance criterion. So far, in spite of its conceptual simplicity, it has lead to a number of state-of-the-art results without the use of too much problem-specific knowledge. But with further work so that the different modules are well adapted to the problem at hand, Iterated Local Search can often become a competitive or even state of the artalgorithm. The purpose of this review is both to give a detailed description of this metaheuristic and to show where it stands in terms of performance.

Quasilocal density functional theory and its application within the extended Thomas-Fermi approximation

In this paper we propose a generalization of the density functional theory. The theory leads to single-particle equations of motion with a quasilocal mean-field operator, which contains a quasiparticle position-dependent effective mass and a spin-orbit potential. The energy density functional is constructed using the extended Thomas-Fermi approximation and the ground-state properties of doubly magic nuclei are considered within the framework of this approach. Calculations were performed using the finite-range Gogny D1S forces and the results are compared with the exact Hartree-Fock calculations

Equation of state of hot, dense stellar matter. Finite temperature nuclear Thomas-Fermi approach

The properties of hot, dense stellar matter are investigated with a finite temperature nuclear Thomas-Fermi model.

The influence of the symmetry energy on the giant monopole resonance of neutron-rich nuclei analyzed in Thomas-Fermi theory

We analyze the influence of the density dependence of the symmetry energy on the average excitation energy of the isoscalar giant monopole resonance (GMR) in stable and exotic neutron-rich nuclei by applying the relativistic extended Thomas-Fermi method in scaling and constrained calculations. For the effective nuclear interaction, we employ the relativistic mean field model supplemented by an isoscalar-isovector meson coupling that allows one to modify the density dependence of the symmetry energy without compromising the success of the model for binding energies and charge radii. The semiclassical estimates of the average energy of the GMR are known to be in good agreement with the results obtained in full RPA calculations. The present analysis is performed along the Pb and Zr isotopic chains. In the scaling calculations, the excitation energy is larger when the symmetry energy is softer. The same happens in the constrained calculations for nuclei with small and moderate neutron excess. However, for nuclei of large isospin the constrained excitation energy becomes smaller in models having a soft symmetry energy. This effect is mainly due to the presence of loosely-bound outer neutrons in these isotopes. A sharp increase of the estimated width of the resonance is found in largely neutron-rich isotopes, even for heavy nuclei, which is enhanced when the symmetry energy of the model is soft. The results indicate that at large neutron numbers the structure of the low-energy region of the GMR strength distribution changes considerably with the density dependence of the nuclear symmetry energy, which may be worthy of further characterization in RPA calculations of the response function.

Scaling calculation of isoscalar giant resonances in relativistic Thomas-Fermi theory

We derive analytical expressions for the excitation energy of the isoscalar giant monopole and quadrupole resonances in finite nuclei, by using the scaling method and the extended ThomasFermi approach to relativistic mean-field theory. We study the ability of several nonlinear σω parameter sets of common use in reproducing the experimental data. For monopole oscillations the calculations agree better with experiment when the nuclear matter incompressibility of the relativistic interaction lies in the range 220260 MeV. The breathing-mode energies of the scaling method compare satisfactorily with those obtained in relativistic RPA and time-dependent mean-field calculations. For quadrupole oscillations, all the analyzed nonlinear parameter sets reproduce the empirical trends reasonably well.

Scaling in relativistic Thomas-Fermi approach for nuclei

By using the scaling method we derive the virial theorem for the relativistic mean field model of nuclei treated in the ThomasFermi approach. The ThomasFermi solutions statisfy the stability condition against scaling. We apply the formalism to study the excitation energy of the breathing mode in finite nuclei with several relativistic parameter sets of common use.