Aplicaciones de Mecánica Computacional en la industria sidero-metalúrgica

En el presente trabajo se presentan aplicaciones de Mecánica Computacional en el ámbito de la industria sidero metalúrgica . Las aplicaciones que se presentan pueden ser divididas en : análisis de procesos de fabricación y análisis de la performance en servicio de productos siderúrgicos. En el primer caso el objetivo del modelado computacional es la optimización de procesos productivos y, en el segundo caso, el objetivo es la evaluación de la prestación que puede esperarse de diversos productos siderúrgicos, en particular se ha analizado la performance de tubos de acero sin costura para aplicaciones petroleras.Peer Reviewe

Aplicaciones de Mecánica Computacional en la industria sidero-metalúrgica

En el presente trabajo se presentan aplicaciones de Mecánica Computacional en el ámbito de la industria sidero metalúrgica . Las aplicaciones que se presentan pueden ser divididas en : análisis de procesos de fabricación y análisis de la performance en servicio de productos siderúrgicos. En el primer caso el objetivo del modelado computacional es la optimización de procesos productivos y, en el segundo caso, el objetivo es la evaluación de la prestación que puede esperarse de diversos productos siderúrgicos, en particular se ha analizado la performance de tubos de acero sin costura para aplicaciones petroleras.Peer Reviewe

Constraints on the Neutrino Mass from SZ Surveys

Statistical measures of galaxy clusters are sensitive to neutrino masses in the sub-eV range. We explore the possibility of using cluster number counts from the ongoing PLANCK/SZ and future cosmic-variance-limited surveys to constrain neutrino masses from CMB data alone. The precision with which the total neutrino mass can be determined from SZ number counts is limited mostly by uncertainties in the cluster mass function and intracluster gas evolution; these are explicitly accounted for in our analysis. We find that projected results from the PLANCK/SZ survey can be used to determine the total neutrino mass with a (1\sigma) uncertainty of 0.06 eV, assuming it is in the range 0.1-0.3 eV, and the survey detection limit is set at the 5\sigma significance level. Our results constitute a significant improvement on the limits expected from PLANCK/CMB lensing measurements, 0.15 eV. Based on expected results from future cosmic-variance-limited (CVL) SZ survey we predict a 1\sigma uncertainty of 0.04 eV, a level comparable to that expected when CMB lensing extraction is carried out with the same experiment. A few percent uncertainty in the mass function parameters could result in up to a factor \sim 2-3 degradation of our PLANCK and CVL forecasts. Our analysis shows that cluster number counts provide a viable complementary cosmological probe to CMB lensing constraints on the total neutrino mass.Comment: Replaced with a revised version to match the MNRAS accepted version. arXiv admin note: text overlap with arXiv:1009.411

Gravitational wave searches for ultralight bosons with LIGO and LISA

Ultralight bosons can induce superradiant instabilities in spinning black holes, tapping their rotational energy to trigger the growth of a bosonic condensate. Possible observational imprints of these boson clouds include (i) direct detection of the nearly monochromatic (resolvable or stochastic) gravitational waves emitted by the condensate, and (ii) statistically significant evidence for the formation of \u201choles\u201d at large spins in the spin versus mass plane (sometimes also referred to as \u201cRegge plane\u201d) of astrophysical black holes. In this work, we focus on the prospects of LISA and LIGO detecting or constraining scalars with mass in the range ms 08[10 1219,10 1215]\u2009\u2009eV and ms 08[10 1214,10 1211]\u2009\u2009eV, respectively. Using astrophysical models of black-hole populations calibrated to observations and black-hole perturbation theory calculations of the gravitational emission, we find that, in optimistic scenarios, LIGO could observe a stochastic background of gravitational radiation in the range ms 08[2 710 1213,10 1212]\u2009\u2009eV, and up to 104 resolvable events in a 4-year search if ms 3c3 710 1213\u2009\u2009eV. LISA could observe a stochastic background for boson masses in the range ms 08[5 710 1219,5 710 1216], and up to 3c103 resolvable events in a 4-year search if ms 3c10 1217\u2009\u2009eV. LISA could further measure spins for black-hole binaries with component masses in the range [103,107]M 99, which is not probed by traditional spin-measurement techniques. A statistical analysis of the spin distribution of these binaries could either rule out scalar fields in the mass range 3c[4 710 1218,10 1214]\u2009\u2009eV, or measure ms with ten percent accuracy if light scalars in the mass range 3c[10 1217,10 1213]\u2009\u2009eV exist