Andreas Asheim
Om
Jeg jobber som forsker i Utviklingsavdelingen ved St. Olavs hospital. Av bakgrunn har jeg en ph.d. in anvendt matematikk, og mitt hovedinteressefelt er hvordan vi kan bruker observasjonsdata til å studere årsakssammenhenger. Jeg er tilknyttet Regforsk (https://www.ntnu.no/ism/forskning/regforsk) og Improve Preterm (https://improve-preterm.eu/).
Publikasjoner
2025
-
Asheim, Andreas;
Næss, Lars Eide;
Krüger, Andreas Jørstad;
Uleberg, Oddvar;
Dale, Jostein;
Haugland, Helge.
(2025)
Does Delayed Response Due to Busy Ambulances Impact Risk of Death and Hospital Service Use?: A Cohort Study of 240,000 Medical Emergencies.
Epidemiology
Vitenskapelig artikkel
-
Asheim, Andreas;
Bovim, Thomas Reiten.
(2025)
Hvorfor har vi lange ventetider?.
Kronikk
-
Asheim, Andreas;
Nilsen, Sara Marie;
Opdahl, Signe;
Risnes, Kari;
Magnussen, Elisabeth Balstad;
Carlsen, Fredrik.
(2025)
The Effects of Hospital Delivery Volume and Travel Time on Perinatal Mortality and Delivery in Transit: Causal Inference with Triangulation.
Epidemiology
Vitenskapelig artikkel
-
Ulvin, Ole Erik Eide;
Uleberg, Oddvar;
Asheim, Andreas;
Haugland, Helge.
(2025)
Introducing an on-site Helicopter Emergency Medical Service (HEMS) physician at the Emergency Medical Communication Centre - implications for dispatch precision at a Norwegian HEMS base.
Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
Vitenskapelig artikkel
-
Andvig, Jørgen Garberg;
Johnsen, Lars Gunnar;
Nilsen, Sara Marie;
Bjørnelv, Gudrun Maria Waaler;
Asheim, Andreas.
(2025)
Falling rates but projected rising numbers of fractures in elderly Norwegians: a study of fracture rates in the Norwegian patient registry from 2010 to 2021, extrapolated to 2041.
Acta Orthopaedica
Vitenskapelig artikkel
2024
-
Vinjerui, Kristin Hestmann;
Asheim, Andreas;
Anthun, Kjartan Sarheim;
Carlsen, Fredrik;
Mjølstad, Bente Prytz;
Nilsen, Sara Marie.
(2024)
General practitioners retiring or relocating and its association with healthcare use and mortality: a cohort study using Norwegian national data.
BMJ Quality and Safety
Vitenskapelig artikkel
-
Næss, Lars Eide;
Krüger, Andreas Jørstad;
Uleberg, Oddvar;
Haugland, Helge;
Dale, Jostein;
Wattø, Jon-Ola.
(2024)
Using machine learning to assess the extent of busy ambulances and its impact on ambulance response times: A retrospective observational study.
PLOS ONE
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Svedahl, Ellen Rabben;
Kaspersen, Silje Lill;
Bjerkeset, Ottar;
Janszky, Imre.
(2024)
Risk of suicide after hospitalizations due to acute physical health conditions—a cohort study of the Norwegian population.
BMC Medicine
Vitenskapelig artikkel
-
Asheim, Andreas;
Lafrenz, Thomas;
Bregeon-Bigler, Jonathan;
Monica, Dybvik.
(2024)
Ta vare på sikkerheten under pustetrening i vann.
Kronikk
-
Wahlberg, Kirsti;
Pape, Kristine;
Austad, Bjarne;
Asheim, Andreas;
Anthun, Kjartan Sarheim;
Bjørngaard, Johan Håkon.
(2024)
School absence policy and healthcare use: a difference-in-difference cohort analysis.
Family Practice
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Svedahl, Ellen Rabben;
Kaspersen, Silje Lill;
Bjerkeset, Ottar;
Janszky, Imre.
(2024)
Correction to: Risk of suicide after hospitalizations due to acute physical health conditions—a cohort study of the Norwegian population (BMC Medicine, (2024), 22, 1, (396), 10.1186/s12916-024-03623-5).
BMC Medicine
Errata
-
Bovim, Thomas Reiten;
Asheim, Andreas.
(2024)
Hvor skal vi plassere ambulansene våre?.
Kronikk
2023
-
Nilsen, Sara Marie;
Valand, Jonas;
Rogne, Tormod;
Asheim, Andreas;
Yin, Weiyao;
Metsälä, Johanna.
(2023)
Gestational age at birth and hospitalisations for infections among individuals aged 0–50 years in Norway: a longitudinal, register-based, cohort study.
EClinicalMedicine
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Opdahl, Signe;
Bjørngaard, Johan Håkon.
(2023)
Et trygt fødetilbud er ikke bare et spørsmål om reisetid.
Kronikk
-
Bjørnelv, Gudrun Maria Waaler;
Asheim, Andreas;
Nilsen, Sara Marie;
Anthun, Kjartan Sarheim;
Carlsen, Fredrik;
Aam, Stina.
(2023)
Mortality and subsequent healthcare use among older patients discharged to a municipality with excess demand for elderly care.
Nordic Journal of Health Economics
Vitenskapelig artikkel
-
Vinjerui, Kristin Hestmann;
Anthun, Kjartan Sarheim;
Asheim, Andreas;
Carlsen, Fredrik;
Mjølstad, Bente Prytz;
Nilsen, Sara Marie.
(2023)
General practitioners ending their practice and impact on patients' health, healthcare use and mortality: a protocol for national registry cohort studies in Norway, 2008 to 2021.
BMJ Open
Vitenskapelig artikkel
-
Nilsen, Sara Marie;
Asheim, Andreas;
Bjørngaard, Johan Håkon.
(2023)
Hvor skal det kuttes?.
Kronikk
2022
-
Nilsen, Sara Marie;
Asheim, Andreas;
Carlsen, Fredrik;
Anthun, Kjartan Sarheim;
Vatten, Lars Johan;
Aam, Stina.
(2022)
How do busy hospital circumstances affect mortality and readmission within 60 days: A cohort study of 680 000 acute admissions in Norway.
Health Policy
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Aam, Stina;
Anthun, Kjartan Sarheim;
Carlsen, Fredrik;
Janszky, Imre.
(2022)
High ward occupancy, bedspacing, and 60 day mortality for patients with myocardial infarction, stroke, and heart failure.
ESC Heart Failure
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Opdahl, Signe;
Risnes, Kari;
Magnussen, Elisabeth Balstad;
Carlsen, Fredrik.
(2022)
Effect of Hospital Delivery Volume and Travel Time on Perinatal Mortality and Transport Delivery in Norway.
Elsevier
Elsevier
Rapport
2021
-
Nilsen, Sara Marie;
Asheim, Andreas;
Carlsen, Fredrik;
Anthun, Kjartan Sarheim;
Johnsen, Lars Gunnar;
Vatten, Lars Johan.
(2021)
High volumes of recent surgical admissions, time to surgery, and 60-day mortality.
The Bone & Joint Journal
Vitenskapelig artikkel
2020
-
Nilsen, Sara Marie;
Bjørngaard, Johan Håkon;
Carlsen, Fredrik;
Anthun, Kjartan Sarheim;
Johnsen, Lars Gunnar;
Vatten, Lars Johan.
(2020)
Hospitals' Discharge Tendency and Risk of Death - An Analysis of 60,000 Norwegian Hip Fracture Patients.
Clinical Epidemiology
Vitenskapelig artikkel
2019
-
Asheim, Andreas;
Bjørnsen, Lars Petter Bache-Wiig;
Næss-Pleym, Lars Eide;
Uleberg, Oddvar;
Dale, Jostein;
Nilsen, Sara Marie.
(2019)
Real-time forecasting of emergency department arrivals using prehospital data.
BMC Emergency Medicine
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Carlsen, Fredrik;
Næss-Pleym, Lars E.;
Uleberg, Oddvar;
Dale, Jostein.
(2019)
The effect of emergency department delays on 30-days mortality in Central Norway.
European journal of emergency medicine
Vitenskapelig artikkel
-
Nilsen, Sara Marie;
Asheim, Andreas;
Tøndel, Gunhild.
(2019)
Helsepersonells oppfattelse av kapasitetspress i spesialisthelsetjenesten.
Tidsskrift for Den norske legeforening (Tidsskriftet)
Vitenskapelig artikkel
2018
-
Halle, Kari Krizak;
Nilsen, Sara Marie;
Asheim, Andreas.
(2018)
Lognormalskjerf.
Visuell kunst
-
Asheim, Andreas;
Nilsen, Sara Marie;
Toch-Marquardt, Marlen;
Anthun, Kjartan Sarheim;
Johnsen, Lars Gunnar;
Bjørngaard, Johan Håkon.
(2018)
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.
Acta Orthopaedica
Vitenskapelig artikkel
-
Krane-Gartiser, Karoline;
Asheim, Andreas;
Fasmer, Ole Bernt;
Morken, Gunnar;
Vaaler, Arne;
Scott, Jan.
(2018)
Actigraphy as an objective intra‑individual marker of activity patterns in acute‑phase bipolar disorder: a case series.
International journal of bipolar disorders
Vitenskapelig artikkel
2016
-
Svensson, U. Peter;
Roman, Sara-Regina Martin;
Asheim, Andreas.
(2016)
Efficient edge source approach to the modeling of multi-edge noise barrier tops.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2015
-
Asheim, Andreas;
Svensson, U. Peter.
(2015)
Erratum: An integral equation formulation for the diffraction from convex plates and polyhedra (Journal of the Acoustical Society of America (2013) 133:6 (3681-3691)).
Journal of the Acoustical Society of America
Errata
2014
-
Nørsett, Syvert Paul;
Asheim, Andreas.
(2014)
Regarding the absolute stability of Størmer-Cowell methods.
Discrete and Continuous Dynamical Systems. Series A
Vitenskapelig artikkel
2013
-
Nørsett, Syvert Paul;
Asheim, Andreas.
(2013)
REGARDING THE ABSOLUTE STABILITY OF STORMER-COWELL METHODS.
Discrete and Continuous Dynamical Systems. Series A
Vitenskapelig artikkel
-
Asheim, Andreas;
Svensson, U. Peter.
(2013)
An integral equation formulation for the diffraction from convex plates and polyhedra.
Journal of the Acoustical Society of America
Vitenskapelig artikkel
-
Svensson, U. Peter;
Asheim, Andreas.
(2013)
Time-domain formulation of an edge source integral equation.
Proceedings of Meetings on Acoustics (POMA)
Vitenskapelig artikkel
2012
-
Svensson, U. Peter;
Asheim, Andreas.
(2012)
An edge-source integral equation for the calculation of scattering (Abstracts).
Journal of the Acoustical Society of America
Sammendrag/Abstract
-
Asheim, Andreas;
Svensson, U. Peter.
(2012)
An integral equation formulation for the diffraction from convex plates and polyhedra.
Leuven University Press
Leuven University Press
Rapport
2011
-
Svensson, U. Peter;
Asheim, Andreas.
(2011)
Edge-diffraction based integral equation for the scattering from convex rigid polyhedra.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2010
-
Asheim, Andreas;
Huybrechs, Daan.
(2010)
Local solutions to high-frequency 2D scattering problems.
Journal of Computational Physics
Vitenskapelig artikkel
-
Svensson, U. Peter;
Asheim, Andreas.
(2010)
Computing diffraction integrals with the numerical method of steepest descent.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Asheim, Andreas;
Nørsett, Syvert;
Owren, Brynjulf.
(2010)
Numerical Methods for Highly Oscillatory Problems.
Norges teknisk-naturvitenskapelige universitet
Doktoravhandlinger ved NTNU, 1503-8181 (2010:115)
Doktorgradsavhandling
-
Asheim, Andreas;
Huybrechs, Daan.
(2010)
Asymptotic Analysis of Numerical Steepest Descent with Path Approximations.
Foundations of Computational Mathematics
Vitenskapelig artikkel
-
Asheim, Andreas;
Svensson, U. Peter.
(2010)
Efficient evaluation of edge diffraction integrals using the numerical method of steepest descent.
Journal of the Acoustical Society of America
Vitenskapelig artikkel
2008
-
Asheim, Andreas.
(2008)
A combined Filon/asymptotic quadrature method for highly oscillatory problems.
BIT Numerical Mathematics
Vitenskapelig artikkel
Tidsskriftspublikasjoner
-
Asheim, Andreas;
Næss, Lars Eide;
Krüger, Andreas Jørstad;
Uleberg, Oddvar;
Dale, Jostein;
Haugland, Helge.
(2025)
Does Delayed Response Due to Busy Ambulances Impact Risk of Death and Hospital Service Use?: A Cohort Study of 240,000 Medical Emergencies.
Epidemiology
Vitenskapelig artikkel
-
Asheim, Andreas;
Bovim, Thomas Reiten.
(2025)
Hvorfor har vi lange ventetider?.
Kronikk
-
Asheim, Andreas;
Nilsen, Sara Marie;
Opdahl, Signe;
Risnes, Kari;
Magnussen, Elisabeth Balstad;
Carlsen, Fredrik.
(2025)
The Effects of Hospital Delivery Volume and Travel Time on Perinatal Mortality and Delivery in Transit: Causal Inference with Triangulation.
Epidemiology
Vitenskapelig artikkel
-
Ulvin, Ole Erik Eide;
Uleberg, Oddvar;
Asheim, Andreas;
Haugland, Helge.
(2025)
Introducing an on-site Helicopter Emergency Medical Service (HEMS) physician at the Emergency Medical Communication Centre - implications for dispatch precision at a Norwegian HEMS base.
Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
Vitenskapelig artikkel
-
Andvig, Jørgen Garberg;
Johnsen, Lars Gunnar;
Nilsen, Sara Marie;
Bjørnelv, Gudrun Maria Waaler;
Asheim, Andreas.
(2025)
Falling rates but projected rising numbers of fractures in elderly Norwegians: a study of fracture rates in the Norwegian patient registry from 2010 to 2021, extrapolated to 2041.
Acta Orthopaedica
Vitenskapelig artikkel
-
Vinjerui, Kristin Hestmann;
Asheim, Andreas;
Anthun, Kjartan Sarheim;
Carlsen, Fredrik;
Mjølstad, Bente Prytz;
Nilsen, Sara Marie.
(2024)
General practitioners retiring or relocating and its association with healthcare use and mortality: a cohort study using Norwegian national data.
BMJ Quality and Safety
Vitenskapelig artikkel
-
Næss, Lars Eide;
Krüger, Andreas Jørstad;
Uleberg, Oddvar;
Haugland, Helge;
Dale, Jostein;
Wattø, Jon-Ola.
(2024)
Using machine learning to assess the extent of busy ambulances and its impact on ambulance response times: A retrospective observational study.
PLOS ONE
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Svedahl, Ellen Rabben;
Kaspersen, Silje Lill;
Bjerkeset, Ottar;
Janszky, Imre.
(2024)
Risk of suicide after hospitalizations due to acute physical health conditions—a cohort study of the Norwegian population.
BMC Medicine
Vitenskapelig artikkel
-
Asheim, Andreas;
Lafrenz, Thomas;
Bregeon-Bigler, Jonathan;
Monica, Dybvik.
(2024)
Ta vare på sikkerheten under pustetrening i vann.
Kronikk
-
Wahlberg, Kirsti;
Pape, Kristine;
Austad, Bjarne;
Asheim, Andreas;
Anthun, Kjartan Sarheim;
Bjørngaard, Johan Håkon.
(2024)
School absence policy and healthcare use: a difference-in-difference cohort analysis.
Family Practice
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Svedahl, Ellen Rabben;
Kaspersen, Silje Lill;
Bjerkeset, Ottar;
Janszky, Imre.
(2024)
Correction to: Risk of suicide after hospitalizations due to acute physical health conditions—a cohort study of the Norwegian population (BMC Medicine, (2024), 22, 1, (396), 10.1186/s12916-024-03623-5).
BMC Medicine
Errata
-
Bovim, Thomas Reiten;
Asheim, Andreas.
(2024)
Hvor skal vi plassere ambulansene våre?.
Kronikk
-
Nilsen, Sara Marie;
Valand, Jonas;
Rogne, Tormod;
Asheim, Andreas;
Yin, Weiyao;
Metsälä, Johanna.
(2023)
Gestational age at birth and hospitalisations for infections among individuals aged 0–50 years in Norway: a longitudinal, register-based, cohort study.
EClinicalMedicine
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Opdahl, Signe;
Bjørngaard, Johan Håkon.
(2023)
Et trygt fødetilbud er ikke bare et spørsmål om reisetid.
Kronikk
-
Bjørnelv, Gudrun Maria Waaler;
Asheim, Andreas;
Nilsen, Sara Marie;
Anthun, Kjartan Sarheim;
Carlsen, Fredrik;
Aam, Stina.
(2023)
Mortality and subsequent healthcare use among older patients discharged to a municipality with excess demand for elderly care.
Nordic Journal of Health Economics
Vitenskapelig artikkel
-
Vinjerui, Kristin Hestmann;
Anthun, Kjartan Sarheim;
Asheim, Andreas;
Carlsen, Fredrik;
Mjølstad, Bente Prytz;
Nilsen, Sara Marie.
(2023)
General practitioners ending their practice and impact on patients' health, healthcare use and mortality: a protocol for national registry cohort studies in Norway, 2008 to 2021.
BMJ Open
Vitenskapelig artikkel
-
Nilsen, Sara Marie;
Asheim, Andreas;
Bjørngaard, Johan Håkon.
(2023)
Hvor skal det kuttes?.
Kronikk
-
Nilsen, Sara Marie;
Asheim, Andreas;
Carlsen, Fredrik;
Anthun, Kjartan Sarheim;
Vatten, Lars Johan;
Aam, Stina.
(2022)
How do busy hospital circumstances affect mortality and readmission within 60 days: A cohort study of 680 000 acute admissions in Norway.
Health Policy
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Aam, Stina;
Anthun, Kjartan Sarheim;
Carlsen, Fredrik;
Janszky, Imre.
(2022)
High ward occupancy, bedspacing, and 60 day mortality for patients with myocardial infarction, stroke, and heart failure.
ESC Heart Failure
Vitenskapelig artikkel
-
Nilsen, Sara Marie;
Asheim, Andreas;
Carlsen, Fredrik;
Anthun, Kjartan Sarheim;
Johnsen, Lars Gunnar;
Vatten, Lars Johan.
(2021)
High volumes of recent surgical admissions, time to surgery, and 60-day mortality.
The Bone & Joint Journal
Vitenskapelig artikkel
-
Nilsen, Sara Marie;
Bjørngaard, Johan Håkon;
Carlsen, Fredrik;
Anthun, Kjartan Sarheim;
Johnsen, Lars Gunnar;
Vatten, Lars Johan.
(2020)
Hospitals' Discharge Tendency and Risk of Death - An Analysis of 60,000 Norwegian Hip Fracture Patients.
Clinical Epidemiology
Vitenskapelig artikkel
-
Asheim, Andreas;
Bjørnsen, Lars Petter Bache-Wiig;
Næss-Pleym, Lars Eide;
Uleberg, Oddvar;
Dale, Jostein;
Nilsen, Sara Marie.
(2019)
Real-time forecasting of emergency department arrivals using prehospital data.
BMC Emergency Medicine
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Carlsen, Fredrik;
Næss-Pleym, Lars E.;
Uleberg, Oddvar;
Dale, Jostein.
(2019)
The effect of emergency department delays on 30-days mortality in Central Norway.
European journal of emergency medicine
Vitenskapelig artikkel
-
Nilsen, Sara Marie;
Asheim, Andreas;
Tøndel, Gunhild.
(2019)
Helsepersonells oppfattelse av kapasitetspress i spesialisthelsetjenesten.
Tidsskrift for Den norske legeforening (Tidsskriftet)
Vitenskapelig artikkel
-
Asheim, Andreas;
Nilsen, Sara Marie;
Toch-Marquardt, Marlen;
Anthun, Kjartan Sarheim;
Johnsen, Lars Gunnar;
Bjørngaard, Johan Håkon.
(2018)
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.
Acta Orthopaedica
Vitenskapelig artikkel
-
Krane-Gartiser, Karoline;
Asheim, Andreas;
Fasmer, Ole Bernt;
Morken, Gunnar;
Vaaler, Arne;
Scott, Jan.
(2018)
Actigraphy as an objective intra‑individual marker of activity patterns in acute‑phase bipolar disorder: a case series.
International journal of bipolar disorders
Vitenskapelig artikkel
-
Asheim, Andreas;
Svensson, U. Peter.
(2015)
Erratum: An integral equation formulation for the diffraction from convex plates and polyhedra (Journal of the Acoustical Society of America (2013) 133:6 (3681-3691)).
Journal of the Acoustical Society of America
Errata
-
Nørsett, Syvert Paul;
Asheim, Andreas.
(2014)
Regarding the absolute stability of Størmer-Cowell methods.
Discrete and Continuous Dynamical Systems. Series A
Vitenskapelig artikkel
-
Nørsett, Syvert Paul;
Asheim, Andreas.
(2013)
REGARDING THE ABSOLUTE STABILITY OF STORMER-COWELL METHODS.
Discrete and Continuous Dynamical Systems. Series A
Vitenskapelig artikkel
-
Asheim, Andreas;
Svensson, U. Peter.
(2013)
An integral equation formulation for the diffraction from convex plates and polyhedra.
Journal of the Acoustical Society of America
Vitenskapelig artikkel
-
Svensson, U. Peter;
Asheim, Andreas.
(2013)
Time-domain formulation of an edge source integral equation.
Proceedings of Meetings on Acoustics (POMA)
Vitenskapelig artikkel
-
Svensson, U. Peter;
Asheim, Andreas.
(2012)
An edge-source integral equation for the calculation of scattering (Abstracts).
Journal of the Acoustical Society of America
Sammendrag/Abstract
-
Asheim, Andreas;
Huybrechs, Daan.
(2010)
Local solutions to high-frequency 2D scattering problems.
Journal of Computational Physics
Vitenskapelig artikkel
-
Asheim, Andreas;
Huybrechs, Daan.
(2010)
Asymptotic Analysis of Numerical Steepest Descent with Path Approximations.
Foundations of Computational Mathematics
Vitenskapelig artikkel
-
Asheim, Andreas;
Svensson, U. Peter.
(2010)
Efficient evaluation of edge diffraction integrals using the numerical method of steepest descent.
Journal of the Acoustical Society of America
Vitenskapelig artikkel
-
Asheim, Andreas.
(2008)
A combined Filon/asymptotic quadrature method for highly oscillatory problems.
BIT Numerical Mathematics
Vitenskapelig artikkel
Kunstneriske produksjoner
-
Halle, Kari Krizak;
Nilsen, Sara Marie;
Asheim, Andreas.
(2018)
Lognormalskjerf.
Visuell kunst
Del av bok/rapport
-
Svensson, U. Peter;
Roman, Sara-Regina Martin;
Asheim, Andreas.
(2016)
Efficient edge source approach to the modeling of multi-edge noise barrier tops.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Svensson, U. Peter;
Asheim, Andreas.
(2011)
Edge-diffraction based integral equation for the scattering from convex rigid polyhedra.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Svensson, U. Peter;
Asheim, Andreas.
(2010)
Computing diffraction integrals with the numerical method of steepest descent.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Rapport
-
Asheim, Andreas;
Nilsen, Sara Marie;
Opdahl, Signe;
Risnes, Kari;
Magnussen, Elisabeth Balstad;
Carlsen, Fredrik.
(2022)
Effect of Hospital Delivery Volume and Travel Time on Perinatal Mortality and Transport Delivery in Norway.
Elsevier
Elsevier
Rapport
-
Asheim, Andreas;
Svensson, U. Peter.
(2012)
An integral equation formulation for the diffraction from convex plates and polyhedra.
Leuven University Press
Leuven University Press
Rapport
-
Asheim, Andreas;
Nørsett, Syvert;
Owren, Brynjulf.
(2010)
Numerical Methods for Highly Oscillatory Problems.
Norges teknisk-naturvitenskapelige universitet
Doktoravhandlinger ved NTNU, 1503-8181 (2010:115)
Doktorgradsavhandling
Formidling
2025
-
Vitenskapelig foredragSchepers, Robin; Bennett, Schyler Marie; Asheim, Andreas; Lyster, Sara Emilie; Edwards, Christina Hansen. (2025) Experiences with preference-based instrumental variable analyses in the context of mental health – experiences from Norway. KaBris 2025 , London 2025-09-10 - 2025-09-11
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Svedahl, Ellen Rabben; Kaspersen, Silje Lill; Bjerkeset, Ottar; Janszky, Imre. (2025) Somatisk akuttinnleggelse og risiko for selvmord. 13. nasjonale konferanse om selvmordsforskning og -forebygging , Quality Hotel Expo, Fornebu 2025-09-03 -
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Vitenskapelig foredragSchepers, Robin; Bennett, Schyler Marie; Anthun, Kjartan Sarheim; Asheim, Andreas; Bjerkeset, Ottar; Bjørnelv, Gudrun Maria Waaler. (2025) General practitioners’ diagnostic preference as a potential instrument for the diagnosis of mental health. Nordic Health Economics Study Group 2025 , Oslo 2025-08-12 - 2025-08-14
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Vitenskapelig foredragBennett, Schyler Marie; Schepers, Robin; Anthun, Kjartan Sarheim; Asheim, Andreas; Bjerkeset, Ottar; Godager, Geir. (2025) Could GPs’ time spent on mental health problems influence their patients’ use of specialist or out-of-hours care? | NHESG 2025. 44th Nordic Health Economists’ Study Group (NHESG) Meeting , University of Oslo 2025-08-13 - 2025-08-15
2024
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PosterAsheim, Andreas; Risnes, Kari; Valand, Jonas; Opdahl, Signe; Sandin, Sven; Nilsen, Sara Marie. (2024) Hospitalizations Due to RTI in Children Born Preterm - Examining the Influence of COVID-19 Preventive Measures. The 2nd European Perinatal and Paediatric Epidemiology Conference (EPPEC) , Copenhagen 2024-09-16 - 2024-09-17
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Vitenskapelig foredragAsheim, Andreas; Næss, Lars Eide; Dale, Jostein; Uleberg, Oddvar; Ulvin, Ole Erik Eide; Krüger, Andreas Jørstad. (2024) Opptatte ambulanser fører til forsinket respons. Har dette konsekvenser for risiko for død og helsetjenestebruk?. Helsetjenesteforskningskonferansen 2024 , Bergen 2024-11-12 - 2024-11-13
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Vitenskapelig foredragAsheim, Andreas; Næss, Lars Eide; Dale, Jostein; Uleberg, Oddvar; Ulvin, Ole Erik Eide; Krüger, Andreas Jørstad. (2024) Does delayed response due to busy ambulances impact the risk of death and hospital service utilisation?. Wennberg International Collaboration , Oslo 2024-09-11 - 2024-09-12
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth Balstad; Carlsen, Fredrik. (2024) Størrelse på fødeinstitusjon, reisetid og utfall. Torsdagsundervisning Statsforvalteren 2024-05-16 -
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Vitenskapelig foredrag
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Vitenskapelig foredragAsheim, Andreas. (2024) Where can ML/AI help, where can it not?. ForHelse SFI samling , Trondheim 2024-05-22 -
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Vitenskapelig foredragAsheim, Andreas; Næss, Lars Eide; Krüger, Andreas Jørstad; Uleberg, Oddvar; Dale, Jostein; Haugland, Helge. (2024) Forsvarlig responstid i ambulansetjenesten. Torsdagsundervisning Statsforvalteren 2024-06-16 -
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Vitenskapelig foredragWahlberg, Kirsti; Pape, Kristine; Austad, Bjarne; Asheim, Andreas; Anthun, Kjartan Sarheim; Bjørngaard, Johan Håkon. (2024) School absence policy and health care use – a difference-in-difference cohort analysis. 23rd Nordic Congress of General Practice 2024 , Turku, Finland 2024-06-12 - 2024-06-14
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Vitenskapelig foredragNæss, Lars Eide; Krüger, Andreas Jørstad; Uleberg, Oddvar; Haugland, Helge; Dale, Jostein; Wattø, Jon-Ola. (2024) Opptatte ambulanser og responstid. Helsetjenesteforskningskonferansen 2024 , Bergen 2024-11-12 - 2024-11-13
2023
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth Balstad; Carlsen, Fredrik. (2023) Effekt av volum og reisetid på fødselsutfall i Norge fra 1999 til 2016. Metodemøte OsloMet 2023-02-27 -
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Faglig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth Balstad; Carlsen, Fredrik. (2023) Bedre beslutningsgrunnlag fra registre, er det trygt for fødende å være tilknyttet små sykehus. Tirsdagsundervisning, anestesi , Trondheim 2023-04-25 -
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Faglig foredragAsheim, Andreas; Nilsen, Sara Marie; Svedahl, Ellen Rabben; Kaspersen, Silje Lill; Bjerkeset, Ottar; Janszky, Imre. (2023) Risk of self-harm following discharge from acute somatic hospitalisations. Exploring causal inference methods with observational data - visit by Professor Neil Davies , Trondheim 2023-08-31 - 2023-08-31
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Næss, Lars Eide; Dale, Jostein; Uleberg, Oddvar; Krüger, Andreas Jørstad. (2023) What is the Consequence of a Delayed Ambulance. Exploring Causal Inference Methods , Trodnheim 2023-08-31 -
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Vitenskapelig foredragVinjerui, Kristin Hestmann; Nilsen, Sara Marie; Asheim, Andreas; Anthun, Kjartan Sarheim; Pape, Kristine; Carlsen, Fredrik. (2023) General Practitioners ending their practice, impact on health care use. Exploring Causal Inference Methods , Trondheim 2023-08-31 -
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PosterNilsen, Sara Marie; Valand, Jonas; Rogne, Tormod; Asheim, Andreas; Weiyao, Yin; Metsälä, Johanna. (2023) Elevated infection risk in lower gestational age groups - most prominent in children but still evident in adults. European Perinatal and Pediatric Epidemiology Conference (EPEC) , Stockholm, Karolinska 2023-09-28 - 2023-09-28
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Faglig foredragNilsen, Sara Marie; Asheim, Andreas; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth Balstad; Carlsen, Fredrik. (2023) Er det trygt å føde på små sykehus?. Faglunsj 2023-03-08 - 2023-03-08
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Vitenskapelig foredragVinjerui, Kristin Hestmann; Asheim, Andreas; Nilsen, Sara Marie; Anthun, Kjartan Sarheim; Pape, Kristine; Carlsen, Fredrik. (2023) Brudd i lege- pasientrelasjonen og helsetjenestebruk. Helsetjenesteforskningskonferansen 2023 , Stavanger 2023-11-02 - 2023-11-03
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Magnussen, Elisabeth Balstad; Risnes, Kari; Carlsen, Fredrik. (2023) Perinatal Mortality and Transport Delivery in Similar Populations with different hospital volumes and travel times. Wennberg International Collaborative Fall Meeting 2023 , Pisa 2023-09-14 - 2023-09-14
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Vitenskapelig foredragAsheim, Andreas; Vinjerui, Kristin Hestmann; Nilsen, Sara Marie; Anthun, Kjartan Sarheim; Pape, Kristine; Carlsen, Fredrik. (2023) General practitioners ending their practice, impact on health care use. Wennberg International Collaborative Fall Meeting 2023 , Pisa 2023-09-14 - 2023-09-15
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Faglig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth Balstad; Carlsen, Fredrik. (2023) Er det trygt å bli født på små sykehus?. Organisering av helsetjenesten: Åpent seminar 11. januar , Trondheim 2023-01-11 -
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Vitenskapelig foredragAsheim, Andreas; Næss, Lars Eide; Nilsen, Sara Marie; Dale, Jostein; Uleberg, Oddvar; Bjørngaard, Johan Håkon. (2023) Forsvarlig responstid i ambulansetjenesten. Organisering av helsetjenesten , St. Olavs hospital 2023-01-11 -
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Faglig foredragAsheim, Andreas; Dale, Jostein; Nilsen, Sara Marie; Bjørngaard, Johan Håkon; Pleym, Lars Eide-Næss. (2023) Forsvarlig responstid i ambulansetjenesten. Faglunsj 2023-02-08 -
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth Balstad; Carlsen, Fredrik. (2023) Størrelse på fødeinstitusjon, reisetid og utfall. Perinataldagene 2023 , Lillehammer 2023-11-22 - 2023-11-24
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Faglig foredragNilsen, Sara Marie; Asheim, Andreas; Bjørngaard, Johan Håkon. (2023) Organisering av helsetjenesten: Åpent seminar 11. januar. Organisering av helsetjenesten: Åpent seminar 11. januar , Trondheim 2023-01-11 - 2023-01-11
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Vitenskapelig foredragWahlberg, Kirsti; Pape, Kristine; Austad, Bjarne; Asheim, Andreas; Anthun, Kjartan Sarheim; Vie, Gunnhild Åberge. (2023) Fraværsgrensas effekt på helsetjenestebruk - en difference-in-difference analyse. Helsetjenesteforskningskonferansen , Stavanger 2023-11-02 - 2023-11-03
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Vitenskapelig foredragNæss-Pleym, Lars Eide; Asheim, Andreas. (2023) Hva har det å si at ambulansen er opptatt?. Organisering av helsetjenesten , St. Olavs hospital 2023-01-11 - 2023-01-11
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Svedahl, Ellen Rabben; Kaspersen, Silje Lill; Bjerkeset, Ottar; Janszky, Imre. (2023) Risiko for suicid etter utskrivning fra nyoppstått akutt somatisk innleggelse. Helsetjenesteforskningskonferansen2023 2023-11-02 - 2023-11-03
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Vitenskapelig foredragBjørnelv, Gudrun Maria Waaler; Asheim, Andreas; Nilsen, Sara Marie; Anthun, Kjartan Sarheim; Carlsen, Fredrik; Aam, Stina. (2023) Betydningen av en presset eldreomsorg. Åpent seminar om organisering av helsetjenesten , Trondheim 2023-01-11 - 2023-01-11
2022
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Vitenskapelig foredragAndvig, Jørgen Garberg; Johnsen, Lars Gunnar; Bjørnelv, Gudrun Maria Waaler; Bjørngaard, Johan Håkon; Nilsen, Sara Marie; Asheim, Andreas. (2022) Frakturepidemiologi i Norge 2009-2016. Høstmøtet , Oslo 2022-10-26 - 2022-10-28
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Vitenskapelig foredragBjørnelv, Gudrun Maria Waaler; Asheim, Andreas; Nilsen, Sara Marie; Anthun, Kjartan Sarheim; Carlsen, Fredrik; Aam, Stina. (2022) Municipal capacity and patient mortality: exploring causal inference on municipal level. European Health Economics Association 2022-08-05 - 2022-08-08
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Faglig foredragVinjerui, Kristin Hestmann; Svedahl, Ellen Rabben; Nilsen, Sara Marie; Kaspersen, Silje Lill; Hosar, Rannei; Vie, Gunnhild Åberge. (2022) Forskning viser at ...., men er det sant?. Researchers Night 2022 , NTNU Realfagsbygget 2022-09-30 -
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Faglig foredragNilsen, Sara Marie; Asheim, Andreas; Carlsen, Fredrik; Anthun, Kjartan Sarheim; Vatten, Lars Johan; Aam, Stina. (2022) Hvordan påvirker press på sykehuset dødelighet og reinnleggelser for eldre pasienter. Høstmøte for primærhelsetjenesten , Trondheim 2022-10-05 -
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth; Carlsen, Fredrik. (2022) Effekt av volum og reisetid på fødselsutfall i Norge fra 1999 til 2016. Helsetjenesteforskningskonferansen 2022 , Tromsø 2022-10-19 -
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Faglig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth; Carlsen, Fredrik. (2022) Effekt av volum og reisetid på fødselsutfall i Norge fra 1999 til 2016. Foredrag for fagavdelingen ved Helse Midt-Norge , HMN Stjørdal 2022-08-27 -
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth; Carlsen, Fredrik. (2022) Effects of hospital delivery volume and travel time on birth outcomes in Norway from 2016 to 2022. Health Economics Seminar , ISM 2022-11-02 -
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Faglig foredragNilsen, Sara Marie; Asheim, Andreas; Carlsen, Fredrik; Anthun, Kjartan Sarheim; Vatten, Lars Johan; Aam, Stina. (2022) How do busy hospital circumstances affect mortality and readmission within 60 days: a cohort study of 680 000 acute admissions in Norway. Helsetjenesteforskningskonferansen 2022 , Tromsø 2022-10-19 -
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Opdahl, Signe; Risnes, Kari; Magnussen, Elisabeth Balstad; Carlsen, Fredrik. (2022) Effekt av volum og reisetid på fødselsutfall i Norge fra 1999 til 2016. Fagledernettverksmøte , Teams 2022-12-08 -
2021
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Faglig foredragBjørngaard, Johan Håkon; Nilsen, Sara Marie; Asheim, Andreas; Carlsen, Fredrik; Anthun, Kjartan Sarheim; Johnsen, Lars Gunnar. (2021) Tid til operasjon og 60-dagers mortalitet i perioder med mange samtidige akuttkirurgiske pasienter- En analyse av 60 000 hoftebruddpasienter. Seminar HUNT , Zoom 2021-02-12 - 2021-02-12
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Faglig foredragNilsen, Sara Marie; Asheim, Andreas; Carlsen, Fredrik; Anthun, Kjartan Sarheim; Johnsen, Lars Gunnar; Vatten, Lars Johan. (2021) Tid til akutt kirurgi - er det no viktig da?. Internundervisning , Zoom 2021-04-27 - 2021-04-27
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Faglig foredragNilsen, Sara Marie; Asheim, Andreas; Carlsen, Fredrik; Anthun, Kjartan Sarheim; Johnsen, Lars Gunnar; Vatten, Lars. (2021) Tid til operasjon og 60-dagers mortalitet i perioder med mange samtidige akuttkirurgiske pasienter- En analyse av 60 000 hoftebruddpasienter. Internundervisning , Norsk helsenett 2021-02-03 - 2021-02-03
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Faglig foredragNilsen, Sara Marie; Asheim, Andreas; Carlsen, Fredrik; Anthun, Kjartan Sarheim; Johnsen, Lars Gunnar; Vatten, Lars Johan. (2021) Hoftebrudd i travle tider. Fredagsforelesning , Trondheim 2021-11-05 - 2021-11-05
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Faglig foredragAsheim, Andreas; Nilsen, Sara Marie. (2021) Natural Experiments in Health Services Research - Regforsk. Digitalization in healthcare , Trondheim 2021-11-04 - 2021-11-04
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IntervjuBrandslet, Steinar; Bjørngaard, Johan Håkon; Johnsen, Lars Gunnar; Asheim, Andreas; Nilsen, Sara Marie. (2021) Flere dør av hoftebrudd når kirurgen har det travelt. Gemini Gemini [null] 2021-02-08
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Faglig foredragBjørngaard, Johan Håkon; Asheim, Andreas; Nilsen, Sara Marie; Carlsen, Fredrik; Anthun, Kjartan Sarheim; Johnsen, Lars Gunnar. (2021) Tid til operasjon og 60-dagers mortalitet i perioder med mange samtidige akuttkirurgiske pasienter- En analyse av 60 000 hoftebruddpasienter. Regionalt fagledernettverk for ortopedi , Zoom 2021-03-19 - 2021-03-19
2020
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Vitenskapelig foredragNilsen, Sara Marie; Asheim, Andreas; Carlsen, Fredrik; Anthun, Kjartan Sarheim; Johnsen, Lars Gunnar; Vatten, Lars. (2020) Utsatte operasjoner og 60-dagers mortalitet blant hoftebruddspasienter i perioder med mange samtidige kirurgiske pasienter. Regforsk - Faglunsj , NTNU 2020-09-23 -
2019
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Vitenskapelig foredragBjørngaard, Johan Håkon; Nilsen, Sara Marie; Asheim, Andreas; Anthun, Kjartan Sarheim; Carlsen, Fredrik; Vatten, Lars Johan. (2019) Fremskyndet utskrivning etter hoftebrudd og risiko for død. Helsetjenesteforskningskonferansen 2019 , Trondheim 2019-03-12 - 2019-03-13
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Vitenskapelig foredragAsheim, Andreas; Bjørnsen, Lars Petter Bache-Wiig; Uleberg, Oddvar; Næss-Pleym, Lars E.; Dale, Jostein; Nilsen, Sara Marie. (2019) Sanntidsprediksjon av pasientankomster med data fra AMK. Helsetjenesteforskningskonferansen 2019 , Trondheim 2019-03-12 - 2019-03-13
2018
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Vitenskapelig foredragAsheim, Andreas; Nilsen, Sara Marie; Carlsen, Fredrik; Dale, Jostein; Bjørnsen, Lars Petter Bache-Wiig; Uleberg, Oddvar. (2018) Emergency department delays and risk of death within 30 days - An instrumental variable analysis. 25th NOFE Conference , Trondheim 2018-11-14 - 2018-11-15
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Faglig foredragAsheim, Andreas; Nilsen, Sara Marie; Carlsen, Fredrik; Næss-Pleym, Lars E.; Uleberg, Oddvar; Dale, Jostein. (2018) Prolonged length of emergency department stay and risk of death within 30 days – an instrumental variable analysis. Fagmøte , Trondheim 2018-06-15 - 2018-06-15
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Faglig foredragAsheim, Andreas; Bjørnsen, Lars Petter Bache-Wiig; Næss-Pleym, Lars E.; Uleberg, Oddvar; Dale, Jostein; Nilsen, Sara Marie. (2018) Forecasting time-distribution of emergency department arrivals. Fagmøte , Trondheim 2018-02-16 - 2018-02-16
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Faglig foredragAsheim, Andreas; Nilsen, Sara Marie; Carlsen, Fredrik; Næss-Pleym, Lars E.; Uleberg, Oddvar; Dale, Jostein. (2018) Akuttmottaket – er forlenget oppholdstid et problem for pasientsikkerheten?. Fagmøte , Stjørdal 2018-09-25 - 2018-09-25
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Faglig foredragAsheim, Andreas; Nilsen, Sara Marie; Carlsen, Fredrik; Næss-Pleym, Lars E.; Uleberg, Oddvar; Bjørnsen, Lars Petter Bache-Wiig. (2018) Akuttmottaket – er forlenget oppholdstid et problem for pasientsikkerheten?. Fagmøte for ledelsen , Trondheim 2018-09-04 - 2018-09-04
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Faglig foredragBjørngaard, Johan Håkon; Nilsen, Sara Marie; Asheim, Andreas; Kaspersen, Silje Lill; Anthun, Kjartan Sarheim; Skarshaug, Lena Janita. (2018) Sommerseminar om kapasitetspress i helsetjenesten. Seminar med brukerorganisasjoner og klinikere 2018-06-13 - 2018-06-13
2017
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Vitenskapelig foredragSvensson, U. Peter; Asheim, Andreas; Roman, Sara-Regina Martin. (2017) Sound propagation through an aperture with edge diffraction modeling. 173rd Meeting of the Acoustical Society of America and the 8th Forum Acusticum, Boston 2017-06-25 - 2017-06-29
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Faglig foredragAsheim, Andreas; Nilsen, Sara Marie; Toch-Marquardt, Marlen; Anthun, Kjartan Sarheim; Johnsen, Lars Gunnar; Bjørngaard, Johan Håkon. (2017) Time of admission and discharge for hip fracture patients. The association with hospital length of stay and mortality. Fagmøte , Trondheim 2017-11-03 - 2017-11-03
2013
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Vitenskapelig foredragSvensson, U. Peter; Asheim, Andreas. (2013) Time-domain formulation of an edge source integral equation. 21st International Congress on Acoustics , Montreal 2013-06-02 - 2013-06-07
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Vitenskapelig foredragAsheim, Andreas; Svensson, U. Peter. (2013) An edge source integral equation for the scattering from a flat plate. The 11th International Conference on Mathematical and Numerical Aspects of Waves , Gammarth 2013-06-03 - 2013-06-07
2012
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Vitenskapelig foredragSvensson, U. Peter; Asheim, Andreas. (2012) An edge-source integral equation for the calculation of scattering (Abstracts). 164th Meeting of the Acoustical Society of America , Kansas City, MO 2012-10-22 - 2012-10-26
2011
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Vitenskapelig foredragSvensson, U. Peter; Asheim, Andreas. (2011) Edge-diffraction based integral equation for the scattering from convex rigid polyhedra. Forum Acusticum 2011 , Aalborg 2011-06-27 - 2011-07-01
2010
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Vitenskapelig foredragSvensson, U. Peter; Asheim, Andreas. (2010) Computing diffraction integrals with the numerical method of steepest descent. The 20th International Congress on Acoustics , Sydney 2010-08-23 - 2010-08-27
2009
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Vitenskapelig foredragAsheim, Andreas. (2009) Combining asymptotic expansions and oscillatory quadrature. SciCade 2009 , Beijing 2009-05-25 - 2009-05-30
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Vitenskapelig foredragAsheim, Andreas. (2009) Høyoscillatorisk kvadratur. KoMiN 2009 (Konferanse for Norske matematikkstudenter) , NTNU, Trondheim 2009-10-30 - 2009-11-01
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Vitenskapelig foredragAsheim, Andreas; Daan, Huybrechs. (2009) The numerical method of steepest descent with approximated paths. ICOSAHOM 2009 , Trondheim 2009-02-22 - 2009-05-26