Now showing items 389-408 of 847

• #### L ∞ variational problems for maps and the Aronsson PDE system ﻿

(Journal of Differential Equations, 2012-12-31)
By employing Aronsson's absolute minimizers of L ∞ functionals, we prove that absolutely minimizing maps u:Rn→RN solve a "tangential" Aronsson PDE system. By following Sheffield and Smart (2012) [24], we derive δ ∞ with ...
• #### Lagged and instantaneous dynamical influences related to brain structural connectivity ﻿

(Frontiers in Psychology, 2015-12-31)
Contemporary neuroimaging methods can shed light on the basis of human neural and cognitive specializations, with important implications for neuroscience and medicine. Indeed, different MRI acquisitions provide different ...
• #### Langevin equation in complex media and anomalous diffusion ﻿

(Journal of the Royal Society Interface, 2018-07-30)
The problem of biological motion is a very intriguing and topical issue. Many efforts are being focused on the development of novel modelling approaches for the description of anomalous diffusion in biological systems, such ...
• #### Large Time Asymptotics for Partially Dissipative Hyperbolic Systems ﻿

(Archive for Rational Mechanics and Analysis, 2011-12-31)
This work is concerned with (n-component) hyperbolic systems of balance laws in m space dimensions. First, we consider linear systems with constant coefficients and analyze the possible behavior of solutions as t → ∞. Using ...
• #### Large-scale simulations of synthetic markets ﻿

(Communications in Applied and Industrial Mathematics, 2015-10-08)
High-frequency trading has been experiencing an increase of interest both for practical purposes within nancial institutions and within academic research; recently, the UK Government O ce for Science reviewed the state ...
• #### Large-time asymptotics, vanishing viscosity and numerics for 1-D scalar conservation laws ﻿

(Mathematics of Computation, 2014-12-31)
In this paper we analyze the large time asymptotic behavior of the discrete solutions of numerical approximation schemes for scalar hyperbolic conservation laws. We consider three monotone conservative schemes that are ...
• #### Large-time behavior of some numerical schemes: application to the sonic-boom phenomenon ﻿

(2014-12-10)
In this thesis we highlight the necessity of employing numerical schemes that preserve the large-time dynamical properties of the continuous system. We focus on Burgers- like equations, which are well known to develop ...
• #### Layout Optimisation of Wave Energy Converter Arrays ﻿

(Energies, 2017-08-24)
This paper proposes an optimisation strategy for the layout design of wave energy converter (WEC) arrays. Optimal layouts are sought so as to maximise the absorbed power given a minimum q-factor, the minimum distance between ...
• #### LBM-HPC - An open-source tool for fluid simulations. Case study: Unified parallel C (UPC-PGAS) ﻿

(Proceedings - IEEE International Conference on Cluster Computing, ICCC, 2015-12-31)
The main motivation of this work is the evaluation of the Unified Parallel C (UPC) model, for Boltzmann-fluid simulations. UPC is one of the current models in the so-called Partitioned Global Address Space paradigm. This ...
• #### Learning to classify software defects from crowds: a novel approach ﻿

(Applied Soft Computing, 2017-11-01)
In software engineering, associating each reported defect with a cate- gory allows, among many other things, for the appropriate allocation of resources. Although this classification task can be automated using stan- dard ...
• #### A least-squares implicit RBF-FD closest point method and applications to PDEs on moving surfaces ﻿

(Journal of Computational Physics, 2018-10)
The closest point method (Ruuth and Merriman, J. Comput. Phys. 227(3):1943-1961, [2008]) is an embedding method developed to solve a variety of partial differential equations (PDEs) on smooth surfaces, using a closest point ...
• #### Leveraging the Performance of LBM-HPC for Large Sizes on GPUs using Ghost Cells ﻿

(ICA3PP: 15th International Conference on Algorithms and Architectures for Parallel Processing, 2016-11-10)
Today, we are living a growing demand of larger and more efficient computational resources from the scienti c community. On the other hand, the appearance of GPUs for general purpose computing supposed an important advance ...
• #### Leveraging the performance of LBM-HPC for large sizes on GPUs using ghost cells ﻿

(Algorithms and Architectures for Parallel Processing, 2016-11-25)
Today, we are living a growing demand of larger and more efficient computational resources from the scientific community. On the other hand, the appearance of GPUs for general purpose computing supposed an important advance ...
• #### Lieb–Robinson Bounds for Multi–Commutators and Applications to Response Theory ﻿

(2016-01-01)
We generalize to multi–commutators the usual Lieb–Robinson bounds for commutators. In the spirit of constructive QFT, this is done so as to allow the use of combinatorics of minimally connected graphs (tree expan- sions) ...
• #### Liquid crystal defects in the Landau–de Gennes theory in two dimensions — Beyond the one-constant approximation ﻿

(Mathematical Models and Methods in Applied Sciences, 2016-12-31)
We consider the two-dimensional Landau-de Gennes energy with several elastic constants, subject to general $k$-radially symmetric boundary conditions. We show that for generic elastic constants the critical points consistent ...
• #### Load balancing in processor sharing systems ﻿

(Telecommunication Systems, 2011-12-31)
We investigate optimal load balancing strategies for a multi-class multi-server processor-sharing system with a Poisson input stream, heterogeneous service rates, and a server-dependent holding cost per unit time. Specifically, ...
• #### Local Exact Controllability for the One-Dimensional Compressible Navier-Stokes Equation ﻿

(Archive for Rational Mechanics and Analysis, 2012-12-31)
In this paper we deal with the isentropic (compressible) Navier-Stokes equation in one space dimension and we adress the problem of the boundary controllability for this system. We prove that we can drive initial conditions ...
• #### Local nonobtuse tetrahedral refinements around an edge ﻿

(Applied Mathematics and Computation, 2013-12-31)
In this note we show how to generate and conformly refine nonobtuse tetrahedral meshes locally around and towards an edge so that all dihedral angles of all resulting tetrahedra remain nonobtuse. The proposed technique can ...
• #### A local search method for graph clustering heuristics based on partitional distribution learning ﻿

(IEEE Congress on Evolutionary Computation, 2017)
The community structure of complex networks reveals hidden relationships in the organization of their constituent nodes. Indeed, many practical problems stemming from different fields of knowledge such as Biology, Sociology, ...
• #### Localized solutions and filtering mechanisms for the discontinuous Galerkin semi-discretizations of the 1-d wave equation [Solutions localisées et mécanismes de filtrage pour les approximations de Galerkin discontinues de l'équation des ondes.] ﻿

(Comptes Rendus Mathematique, 2010-12-31)
We perform a complete Fourier analysis of the semi-discrete 1-d wave equation obtained through a P1 discontinuous Galerkin (DG) approximation of the continuous wave equation on an uniform grid. The resulting system exhibits ...