Now showing items 91-110 of 204

• #### High-accuracy adaptive modeling of the energy distribution of a meniscus-shaped cell culture in a Petri dish ﻿

(2015-12-31)
Cylindrical Petri dishes embedded in a rectangular waveguide and exposed to a polarized electromagnetic wave are often used to grow cell cultures. To guarantee the success of these cultures, it is necessary to enforce that ...
• #### High-frequency analysis of the efficiency of a local approximate DtN2 boundary condition for prolate spheroidal-shaped boundaries ﻿

(2010-12-31)
The performance of the second-order local approximate DtN boundary condition suggested in [4] is investigated analytically when employed for solving high-frequency exterior Helmholtz problems with elongated scatterers. ...
• #### Highly-accurate 5-axis flank CNC machining with conical tools ﻿

(2018-04)
A new method for $5$-axis flank computer numerically controlled (CNC) machining using a predefined set of tappered ball-end-mill tools (aka conical) cutters is proposed. The space of lines that admit tangential motion of ...
• #### $hp$-Adaptive Simulation and Inversion of Magnetotelluric Measurements ﻿

(2015-12-18)
The magnetotelluric (MT) method is a passive exploration technique that aims at esti- mating the resistivity distribution of the Earth’s subsurface, and therefore at providing an image of it. This process is divided into ...
• #### A hybrid method for inversion of 3D DC resistivity logging measurements ﻿

(2014-12-31)
This paper focuses on the application of hp hierarchic genetic strategy (hp-HGS) for solution of a challenging problem, the inversion of 3D direct current (DC) resistivity logging measurements. The problem under consideration ...
• #### Hypersingular integral equations over a disc: Convergence of a spectral method and connection with Tranter's method ﻿

(2014-12-31)
Two-dimensional hypersingular equations over a disc are considered. A spectral method is developed, using Fourier series in the azimuthal direction and orthogonal polynomials in the radial direction. The method is proved ...
• #### ICCS 2017 Workshop on Agent-Based Simulations, Adaptive Algorithms and Solvers ﻿

(2017)
This workshop seeks to integrate results from different domains of computer science, computational science, and mathematics. We welcome simulation papers, either hard simulations using finite element or finite difference ...
• #### An IMEX scheme combined with Richardson extrapolation methods for some reaction-diffusion equations ﻿

(2013-12-31)
An implicit-explicit (IMEX) method is combined with some so-called Richardson extrapolation (RiEx) methods for the numerical solution of reaction-diffusion equations with pure Neumann boundary conditions. The results are ...
• #### An IMEX scheme for reaction-diffusion equations: Application for a PEM fuel cell model ﻿

(2013-12-31)
An implicit-explicit (IMEX) method is developed for the numerical solution of reaction-diffusion equations with pure Neumann boundary conditions. The corresponding method of lines scheme with finite differences is analyzed: ...
• #### An implicit symplectic solver for high-precision long term integrations of the Solar System ﻿

(2022)
We present FCIRK16, a 16th-order implicit symplectic integrator for long-term high precision Solar System simulations. Our integrator takes advantage of the near-Keplerian motion of the planets around the Sun by ...
• #### Influence of borehole-eccentred tools on wireline and logging-while-drilling sonic logging measurements ﻿

(2013-06)
We describe a numerical study to quantify the influence of tool-eccentricity on wireline and logging-while-drilling (LWD) sonic logging measurements. Simulations are performed with a hp-adaptive Fourier Finite-Element ...
• #### Intersecting invariant manifolds in spatial restricted three-body problems: Design and optimization of Earth-to-halo transfers in the Sun-Earth-Moon scenario ﻿

(2012-12-31)
This work deals with the design of transfers connecting LEOs with halo orbits around libration points of the Earth-Moon CRTBP using impulsive maneuvers. Exploiting the coupled circular restricted three-body problem ...
• #### Large-offset P-wave traveltime in layered transversely isotropic media ﻿

(2021-05-01)
Large-offset seismic data processing, imaging, and velocity estimation require an accurate traveltime approximation over a wide range of offsets. In layered transversely isotropic media with a vertical symmetry axis, the ...
• #### Local nonobtuse tetrahedral refinements around an edge ﻿

(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 ...
• #### Low cost a posteriori error estimators for an augmented mixed FEM in linear elasticity. Dedicated to Professor Rodolfo Rodríguez on the occasion of his 60th birthday. ﻿

(2014-12-31)
We consider an augmented mixed finite element method applied to the linear elasticity problem and derive a posteriori error estimators that are simpler and easier to implement than the ones available in the literature. In ...

(2020)
• #### Machining-induced characteristics of microstructure-supported LPBF-IN718 curved thin walls ﻿

(2022-07)
The microstructure-supported design of engineering components is recently gaining attention due to their high strength-to-weight and high stiffness-to-weight properties. The present study investigates the hybrid manufacturing ...
• #### Magnetotelluric characterization of the alhama de murcia fault (Eastern Betics) - Preliminary results ﻿

(2016-12-31)
The Lorca Earthquake (11/5/2011, Mw 5.2) stands as the most destructive in Spain over the last 50 years. It was interpreted as having occurred in an intersegment zone of the strike-slip Alhama de Murcia Fault (AMF). Within ...
• #### Majorant series for the N-body problem ﻿

(2021-01-01)
As a follow-up of a previous work of the authors, this work considers uniform global time-renormalization functions for the gravitationalN-body problem. It improves on the estimates of the radii of convergence obtained ...
• #### Manufacturing of screw rotors via 5-axis double-flank CNC machining ﻿

(2020-11)
We investigate a recently introduced methodology for 5-axis flank computer numerically controlled (CNC) machining, called double-flank milling [1]. We show that screw rotors are well suited for this manufacturing approach ...