Tomáš Oberhuber

Electron-scattering form factors for Li 6 in the ab initio symmetry-guided framework

We present an ab initio symmetry-adapted no-core shell-model description for

Implementation of the Vanka-type multigrid solver for the finite element approximation of the Navier–Stokes equations on GPU

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SEGMENTING TAGGED CARDIAC MRI DATA USING A LOCAL VARIANCE FILTER

Li. We study the structure of the ground state of

Importance Truncation in the SU(3) Symmetry-adapted No-core Shell Model

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Efficient Parallel Generation of Many-Nucleon Basis for Large-Scale Ab Initio Nuclear Structure Calculations

Li and the impact of the symmetry-guided space selection on the charge density components for this state in momentum space, including the effect of higher shells. We accomplish this by investigating the electron scattering charge form factor for momentum transfers up to

Emergence of Simple Patterns in Complex Atomic Nuclei from First Principles

q \sim 4

New Row-grouped CSR format for storing the sparse matrices on GPU with implementation in CUDA

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Comparison study for Level set and Direct Lagrangian methods for computing Willmore flow of closed planar curves

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The CUDA implementation of the method of lines for the curvature dependent flows

. We demonstrate that this symmetry-adapted framework can achieve significantly reduced dimensions for equivalent large shell-model spaces while retaining the accuracy of the form factor for any momentum transfer. These new results confirm the previous outcomes for selected spectroscopy observables in light nuclei, such as binding energies, excitation energies, electromagnetic moments, E2 and M1 reduced transition probabilities, as well as point-nucleon matter rms radii.

FINITE DIFFERENCE SCHEME FOR THE WILLMORE FLOW OF GRAPHS

Abstract We present a complete GPU implementation of a geometric multigrid solver for the numerical solution of the Navier–Stokes equations for incompressible flow. The approximate solution is constructed on a two-dimensional unstructured triangular mesh. The problem is discretized by means of the mixed finite element method with semi-implicit timestepping. The linear saddle-point problem arising from the scheme is solved by the geometric multigrid method with a Vanka-type smoother. The parallel solver is based on the red–black coloring of the mesh triangles. We achieved a speed-up of 11 compared to a parallel (4 threads) code based on OpenMP and 19 compared to a sequential code.