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Andreas Asheim
Andreas Asheim
Researcher, St. Olav's Hospital Trondheim
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An integral equation formulation for the diffraction from convex plates and polyhedra
A Asheim, U Peter Svensson
The Journal of the Acoustical Society of America 133 (6), 3681-3691, 2013
552013
Asymptotic analysis of numerical steepest descent with path approximations
A Asheim, D Huybrechs
Foundations of Computational Mathematics 10, 647-671, 2010
532010
Complex Gaussian quadrature for oscillatory integral transforms
A Asheim, D Huybrechs
IMA Journal of Numerical Analysis 33 (4), 1322-1341, 2013
412013
Real-time forecasting of emergency department arrivals using prehospital data
A Asheim, LP Bache-Wiig Bjørnsen, LE Næss-Pleym, O Uleberg, J Dale, ...
BMC emergency medicine 19, 1-6, 2019
342019
A Gaussian quadrature rule for oscillatory integrals on a bounded interval
A Asheim, A Deaño, D Huybrechs, H Wang
arXiv preprint arXiv:1212.1293, 2012
342012
Local solutions to high-frequency 2D scattering problems
A Asheim, D Huybrechs
Journal of Computational Physics 229 (14), 5357-5372, 2010
292010
Actigraphy as an objective intra-individual marker of activity patterns in acute-phase bipolar disorder: a case series
K Krane-Gartiser, A Asheim, OB Fasmer, G Morken, AE Vaaler, J Scott
International journal of bipolar disorders 6, 1-7, 2018
262018
Extraction of uniformly accurate phase functions across smooth shadow boundaries in high frequency scattering problems
A Asheim, D Huybrechs
SIAM Journal on Applied Mathematics 74 (2), 454-476, 2014
192014
Efficient evaluation of edge diffraction integrals using the numerical method of steepest descent
A Asheim, UP Svensson
Journal of the Acoustical Society of America 128 (4), 1590, 2010
192010
Time of admission and mortality after hip fracture: a detailed look at the weekend effect in a nationwide study of 55,211 hip fracture patients in Norway
A Asheim, SM Nilsen, M Toch-Marquardt, KS Anthun, LG Johnsen, ...
Acta orthopaedica 89 (6), 610-614, 2018
182018
The effect of emergency department delays on 30-day mortality in Central Norway
A Asheim, SM Nilsen, F Carlsen, LE Næss-Pleym, O Uleberg, J Dale, ...
European Journal of Emergency Medicine 26 (6), 446-452, 2019
172019
Hospitals discharge tendency and risk of death-an analysis of 60,000 Norwegian hip fracture patients
SM Nilsen, JH Bjørngaard, F Carlsen, KS Anthun, LG Johnsen, LJ Vatten, ...
Clinical Epidemiology, 173-182, 2020
162020
A combined Filon/asymptotic quadrature method for highly oscillatory problems
A Asheim
BIT Numerical Mathematics 48, 425-448, 2008
152008
Numerical methods for highly oscillatory problems
A Asheim
NTNU, 2010
102010
Some studies on the deformation of the membrane in an RF MEMS switch
VR Ambati, A Asheim, JB van den Berg, Y van Gennip, T Gerasimov, ...
Proceedings of the sixty-third European Study Group Mathematics with …, 2008
82008
Using machine learning to assess the extent of busy ambulances and its impact on ambulance response times: A retrospective observational study
LE Næss, AJ Krüger, O Uleberg, H Haugland, J Dale, JO Wattø, ...
Plos one 19 (1), e0296308, 2024
72024
Time-domain formulation of an edge source integral equation
P Svensson, A Asheim
Proceedings of Meetings on Acoustics 19 (1), 2013
72013
Edge-diffraction based integral equation for the scattering from convex rigid polyhedra
UP Svensson, A Asheim
Proc. of Forum Acusticum, 179-184, 2011
72011
A remedy for the failure of the numerical steepest descent method on a class of oscillatory integrals
A Asheim
BIT Numerical Mathematics 54 (3), 587-605, 2014
62014
Applying the numerical method of steepest descent on multivariate oscillatory integrals in scattering theory
A Asheim
arXiv preprint arXiv:1302.1019, 2013
62013
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