A generalization of the Friedrichs angle and the method of alternating projections
Comptes Rendus. Mathématique, 2009 We present a generalization to an arbitrary number of subspaces of the cosine of the Friedrichs angle between two subspaces of a Hilbert space. This parameter is used to analyze the rate of convergence in the von Neumann–Halperin method of alternating projections.
Badea, Catalin +2 more
openaire +4 more sources
Friedrich Ackermann’s scientific research program
Geo-spatial Information Science, 2023 We sketch Friedrich Ackermann’s research program following the concept of Imre Lakatos, with some historical key developments in the theory and application of aerotriangulation and image matching.
Wolfgang Förstner
doaj +1 more source
An Open Framework for Extensible Multi-Stage Bioinformatics Software [PDF]
, 2012 In research labs, there is often a need to customise software at every step in a given bioinformatics workflow, but traditionally it has been difficult to obtain both a high degree of customisability and good performance.
Bellgard, Matthew +3 more
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A high-order Godunov scheme for global 3D MHD accretion disks simulations. I. The linear growth regime of the magneto-rotational instability [PDF]
, 2009 We employ the PLUTO code for computational astrophysics to assess and compare the validity of different numerical algorithms on simulations of the magneto-rotational instability in 3D accretion disks.
A. Mignone +56 more
core +2 more sources
Crystal structure of the high-pressure phase of the oxonitridosilicate chloride Ce4[Si4O3 + xN7 − x]Cl1 − xOx, x≃0.2 [PDF]
, 2006 The structural compression mechanism of Ce4[Si4O3 + xN7 − x]Cl1 − xOx, x≃ 0.2, was investigated by in situ single-crystal synchrotron X-ray diffraction at pressures of 3.0, 8.5 and 8.6 GPa using the diamond–anvil cell technique.
Friedrich, Alexandra +6 more
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Molecular rheotaxis directs DNA migration and concentration against a pressure-driven flow
Nature Communications, 2017 Implementing a nucleic acid preconcentration method can improve the sensitivity of microfluidic analysis systems. Here Friedrich et al. concentrate DNA by many orders of magnitude using pressure-driven flow, which could lead to a simple and practical ...
Sarah M. Friedrich +4 more
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Images, 2021 The article probes the intermedial structure of the skeuomorphic interface in Pathfinder: Kingmaker. The author indicates that intermedia research in game studies is often diachronically limited, focusing on material and semiotic interactions between ...
Michał Dawid Żmuda
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Precise response functions in all-electron methods: Application to the optimized-effective-potential approach [PDF]
, 2012 The optimized-effective-potential (OEP) method is a special technique to construct local Kohn-Sham potentials from general orbital-dependent energy functionals. In a recent publication [M. Betzinger, C. Friedrich, S. Bl\"ugel, A. G\"orling, Phys. Rev.
Betzinger, Markus +3 more
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The electric and magnetic form factors of the proton [PDF]
, 2013 The paper describes a precise measurement of electron scattering off the proton at momentum transfers of $0.003 \lesssim Q^2 \lesssim 1$\ GeV$^2$. The average point-to-point error of the cross sections in this experiment is $\sim$ 0.37%.
A. Esser +25 more
core +4 more sources
ADI-MRTD Algorithm for Periodic Structures Analysis
International Journal of Antennas and Propagation, 2018 In this paper, a novel algorithm based on the alternating direction implicit (ADI) multiresolution time-domain (MRTD) method for periodic structure simulation is proposed.
Xiaohua Dong +4 more
doaj +1 more source