Now showing items 21-40 of 54

• #### GSAC - Some considerations on potential scientific applications of GNSS Inter-Satellite Links (ISL) presentation ﻿

(2013-12-03)
External research report
Restricted access - confidentiality agreement
• #### Heterogenous mean-field analysis of a generalized voter-like model on networks ﻿

(Springer, 2012-03)
Article
Open Access
We propose a generalized framework for the study of voter models in complex networks at the heterogeneous mean-field (HMF) level that (i) yields a unified picture for existing copy/invasion processes and (ii) allows for ...
• #### Higher-order mechanics: variational principles and other topics ﻿

(American Institute of Mathematical Sciences, 2013-12)
Article
Open Access
After reviewing the Lagrangian-Hamiltonian unified formalism (i.e, the Skinner-Rusk formalism) for higher-order (non-autonomous) dynamical systems, we state a unified geometrical version of the Variational Principles which ...
• #### Impact of higher order ionospheric delay on precise GNSS computation ﻿

(2013)
Conference report
Open Access
• #### INSPIRE: DI 1-1 Technical Note with assessment of state-of-the-art of earthquake precursors identification ﻿

(2014-12-25)
External research report
Restricted access - confidentiality agreement
• #### INSPIRE: DI 1-2 Technical Note with definition of methodology for identification of earthquake signatures ﻿

(2014-12-25)
External research report
Restricted access - confidentiality agreement
• #### INSPIRE: DI 2-1 Technical Note describing the design and development of the database with performance criteria ﻿

(2015-01-26)
External research report
Restricted access - confidentiality agreement
• #### Ionosphere/Plasmasphere sounding with ground and space-based GNSS observations ﻿

(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Conference report
Open Access
Applying a methodology developed and tested in previous studies, the contribution from the ionospheric and plasmaspheric regions to the total electron content (measured by ground receivers) is analyzed. ...
• #### Modelling shoreface-connected sand ridges observed at the inner shelf of the Ebro delta ﻿

(Universitat Politècnica de Catalunya, 2018-06)
Bachelor thesis
Open Access
The large amount of sand provided by coastal erosion in the river mouth and the combination between high-speed currents induced by Mistral wind and severe wave-storm events might have been the favourable conditions in the ...
• #### Models for atmospheric propagation delays ﻿

(International Earth Rotation and Reference Systems Service Central Bureau, 2012-08-10)
Part of book or chapter of book
Open Access
Techniques operated for the realization of the IERS reference systems make use of electromagnetic signals received on the surface of the Earth. During their transit of the atmosphere, the signals experience delays which ...
• #### Novel ionospheric activity indicator specifically tailored for GNSS users ﻿

Conference report
Restricted access - author's decision
This work introduces a novel ionospheric activity indicator useful for identifying disturbed periods affecting performance for GNSS users, at regional level. This indicator is based in the “Along Arc TEC Rate (AATR) and ...
• #### Numerical modeling of sound transmission in double walls ﻿

(European Acoustics Association, 2006)
Conference report
Open Access
Numerical models for the calculation of sound transmission in double walls are presented. The finite element method (FEM) or analytical solutions (for rectangular domains) are used for the acoustic part of the problem while ...
• #### On maps with given jacobians involving the heat equation ﻿

(2000)
Article
Open Access
In this paper we presennt and analyze two new algorithms to construct a smooth diffeomorphism of a domain with prescribed jacobian function. The first one is free from any restriction on the boundary, while the second ...
• #### Order reduction, projectability and constrainsts of second-order field theories and higuer-order mechanics ﻿

(2016-12-01)
Article
Open Access
The consequences of the projectability of Poincar\'e-Cartan forms in a third-order jet bundle $J^3\pi$ to a lower-order jet bundle are analyzed using the constraint algorithm for the Euler-Lagrange equations in $J^3\pi$. ...
• #### Planelike minimizers of nonlocal Ginzburg-Landau energies and fractional perimeters in periodic media ﻿

(2018-07-01)
Article
Open Access
We consider here a nonlocal phase transition energy in a periodic medium and we construct solutions whose interfaces lie at a bounded distance from any given hyperplane. These solutions are either periodic or quasiperiodic, ...
• #### Quantum corrections in nanoplasmonics & deep neural network training with reverse supervision ﻿

(Universitat Politècnica de Catalunya, 2018-05)
Bachelor thesis
Open Access
Covenantee:  Massachusetts Institute of Technology
The classical theory of plasmonics fails dramatically at geometric length scales below 30 nm, due to quantum phenomena like electronic spill-out of the wave function, nonlocality and Landau damping. An alternative to the ...
• #### Rigidity of infinitesimal momentum maps ﻿

(2016)
Article
Open Access
In this paper we prove rigidity theorems for Poisson Lie group actions on Poisson manifolds. In particular, we prove that close infinitesimal momentum maps associated to Poisson Lie group actions are equivalent using a ...
• #### Shape dynamics, lipid hydrodynamics, and the complex viscoelasticty of bilayer membranes ﻿

(2012-07)
Article
Restricted access - publisher's policy
Biological membranes are continuously brought out of equilibrium, as they shape organelles, package and transport cargo, or respond to external actions. Even the dynamics of plain lipid membranes in experimental model systems ...
• #### Shortcuts to adiabaticity for the transport of matter waves ﻿

(Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2013-09-10)
Master thesis
Open Access
[ANGLES] In this master thesis we investigate the quantum transport of a single neutral atom between double-well and triple-well potentials. In particular, we study and implement the Fast-Forward technique to speed up the ...
• #### Singularity Theorems ﻿

(Universitat Politècnica de Catalunya, 2016)
Bachelor thesis
Open Access
The main singularity theorems are reviewed, and a detailed development of the required mathematical tools in their proofs is performed. Also, the plausibility and applicability of the assumptions of the theorems to realistic ...