Dispersion analysis in wave propagation using parametrized mimetic finite differences

Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2017, Tutora : Pilar Queralt CapdevilaWave propagation simulations using numerical methods are subject to dispersion errors due to the discrete nature of the differentiation operator. To minimize the effects of dispersion, high-order operators are preferred to solve the wave propagation model. The mimetic finite-difference method is a family of fourth-order finite-difference operators which can be constructed by varying a set of six free parameters. In this work, I explore the effect of varying these parameters on the dispersion of elastic waves, in search of the optimal set of values to minimize this anomaly in a one-dimensional problem

La convulsió de 1750 referent al culte de Ramon Llull

Abstract not availabl

Implementation of Video Game Character Visual Effects Final Degree Work Report

Treball final de Grau en Disseny i Desenvolupament de Videojocs. Codi: VJ1241. Curs acadèmic: 2021/2022This document contains the report of the Video Game Design and Development Final Degree Project by Miguel Ferrer Carrasco. It consists of the development and implementation of six different stylized video game visual effects (VFX) in the game engine Unity 3D by using both procedural and handmade techniques. The effects implemented in this work are intended to serve as working assets for an action-RPG or fighting 3D video game, being reproducible and parameterized for their use in other projects

On-site approximation for spin-orbit coupling in LCAO density functional methods

We propose a computational method that simplifies drastically the inclusion of spin-orbit interaction in density functional theory implemented on localised atomic orbital basis sets. Our method is based on a well-known procedure for obtaining pseudopotentials from atomic relativistic 'ab initio' calculations and on an on-site approximation for the spin-orbit matrix elements. We have implemented the technique in the SIESTA code, and we show that it provides accurate results for the overall band structure and splittings of group IV and III-IV semiconductors as well as for 5d metals.Comment: 8 pages, 4 figures. Published in J. Phys.: Condens. Matter 18 7999-8013, 2006. Some errata correcte

Supplementary feeding and the population dynamic of the Spanish imperial eagle

Supplementary feeding could be a useful technique to avoid losses of chicks in certain nests under peculiar circumstances, but it could be appropriate to prolong it until the end of the dependence period also. This would prevent the negative effects on breeders clearly pointed out by Blanco (2006). We have serious concerns about the real magnitude of siblicide in this species, as well as about the possible effect on the growth speed of the population that techniques aimed to improve fecundity would have. Consequently, the suggestion of extending this technique to a large proportion of the breeding population must be seriously reconsidered. The idea that breeding populations and their fecundity are the main target for conservation plans must be revised, according to most recent advances on population dynamics of long-lived species and structure of populations.Peer Reviewe

Movements of juvenile Bonelli's eagles aquila Fasciata during dispersal

Capsule Juvenile non-breeding males and females explored surrounding areas, returned to breeding areas, and settled in temporary settlement areas. Aims To describe movement patterns of juvenile Bonelli's Eagles during the transient phase of dispersal. Methods Radiotelemetry data from 16 individuals were studied. Results Six main temporary settlement areas were located. No sex differences were found in the time to first departure from natal areas, time to the first temporary settlement, or time of the first return to natal areas. Juvenile eagles did not settle in temporary settlement areas until they were, on average, 245 days old. In general, males and females did not differ in their movement patterns during the early part of the dispersal period. However, after approximately 500 days males spent 60.8% of their time exploring surrounding areas, probably with the aim of searching for vacant territories or mates, whereas females of the same age devoted 26.7% of their time to exploration. Conclusion Movements and use of sites during the transient phase of dispersal are complex. They have important implications for the conservation of this endangered species. © 2009 British Trust for Ornithology.Peer Reviewe

Culte a Ramon Llull:

Abstract not availabl