- bjorn.hjertaker@uib.no
- Phone number
- +47 55582782
- Visitor address
-
Allégaten 55
5007 Bergen - Room: 208
- Postal address
-
P.O. Box 7803NO-5020 BergenNorway
Research groups
Teaching
Publications
2025
- Ahmed Ghanoum Ghanoum; Gloria Stenfelt; Bjørn Tore Hjertaker (2025). Eksperimentell metode for prediksjon av skipsmotstand basert på validering. (external link)
- Trygve Ulland Dirdal; Jan Michael Simon Bartl; Bjørn Tore Hjertaker (2025). Experimental testing of twist- and chord modified wake control rotors for wind turbines. (external link)
- Jarand Stavn Ugulen; David Lande-Sudall; Bjørn Tore Hjertaker (2025). Float optimisation for the multibody energy converter-M4. (external link)
- Hanne Johnsen Kristoffersen; Gloria Stenfelt; Bjørn Tore Hjertaker (2025). Eksperimentell responsanalyse av en lukket sjømerd med rammefortøyning. (external link)
- Martine Andreeva; Thomas Henrik Hertzfelder Hansen; Bjørn Tore Hjertaker (2025). Hydrofoil analysis using the Vortex Lattice Method. (external link)
- Kristine Øxnevad Larsen; David Lande-Sudall; Bjørn Tore Hjertaker (2025). A combined experimental and numerical study of nylon moorings for the INO WINDMOOR floating wind turbine. (external link)
- Marcus Pira; Thomas Henrik Hertzfelder Hansen; Bjørn Tore Hjertaker (2025). Optimisation of hydrofoils for increased performance and cavitation resistance. (external link)
- Erica Iselin Svendsen; Gloria Stenfelt; Bjørn Tore Hjertaker (2025). Numerical Mooring Analysis and Accidental Limit State Assessment of a Floating Closed Aquaculture Cage. (external link)
- Sindre Hatvik Gaassand; David Lande-Sudall; Bjørn Tore Hjertaker (2025). Modelling and Analysis of the Zephyros Spar Floating Wind Turbine. (external link)
- Hedda With Falck; Jan Michael Simon Bartl; Bjørn Tore Hjertaker et al. (2025). Comparison of Analytical Models for Wind Farm Flows. (external link)
2011
- Kjetil Haukalid; Bjørn Tore Hjertaker; Kjetil Folgerø (2011). Den coplanare bølgelederen som permittivitetssensor. (external link)
- Bjørn Tore Hjertaker; Rachid Maad; Geir Anton Johansen (2011). Dual-mode capacitance and gamma-ray tomography using the Landweber reconstruction algorithm. (external link)
2014
- Geir Anton Johansen; Ilker Meric; Rachid Maad et al. (2014). Non-destructive monitoring of multiphase hydrocarbon flow by high-speed gamma-ray tomography. (external link)
- Jana Preclíková; Martin Kozak; Daniel Fregenal et al. (2014). Coherent control of superposition of atomic Rydberg states with femtosecond laser pulses. (external link)
2023
- Ørjan Lunde; Jan Michael Simon Bartl; Bjørn Tore Hjertaker (2023). Yaw misalignment of a passively yawed floating multirotor wind turbine. (external link)
- Sondre Tolleifsen; David Lande-Sudall; Bjørn Tore Hjertaker (2023). Eksperimentell undersøkelse med modellturbin under konstant slep og bølgebelastning. (external link)
- Thomas Eriksen; Jan Michael Simon Bartl; Bjørn Tore Hjertaker (2023). Flow measurements in the wake of multirotor wind turbine arrangements. (external link)
- Oskar Voldsund; Ments Tore Møller; Muk Chen Ong et al. (2023). Estimation and Verification of Hydrodynamic Parameters of an ROV using CFD. (external link)
- Oliver Trygve Bindingsbø; Maneesh Singh; Bjørn Tore Hjertaker et al. (2023). Fault detection of a wind turbine generator bearing using interpretable machine learning. (external link)
- Johanna Diamondra Rafetinirinarisoa; David Lande-Sudall; Thomas Henrik Hertzfelder Hansen et al. (2023). Aerodynamisk nedskalering av en 20 MW vindturbin. (external link)
2006
- Bjørn Tore Hjertaker (2006). Midtveiseksamen basert på flervalgsoppgaver ved Institutt for fysikk og teknologi, Universitetet i Bergen. (external link)
- Ole Andreas Almås; Bjørn Tore Hjertaker (2006). Design og implementering av datainnsamlingsenhet for gammatomograf. (external link)
- Gunnar Nøttveit; Geir Anton Johansen; Bjørn Tore Hjertaker (2006). A LabVIEW implemented digital Multi Channel Analyzer (MCA). (external link)
- Anne Lise Fimreite; Bjørn Tore Hjertaker (2006). Sammenlignende studie av mastergradsveiledning ved to institutt. (external link)
- Tom Dyakowski; Geir Anton Johansen; Bjørn Tore Hjertaker et al. (2006). A dual modality tomography system for imaging gas/solids flows. (external link)
2024
- Mette Sølvberg Silden; Thomas Henrik Hertzfelder Hansen; Bjørn Tore Hjertaker (2024). Design of experimental hydrofoil setup using RANS CFD. (external link)
- Daniel Almenning Kvalheim; Jan Michael Simon Bartl; Bjørn Tore Hjertaker (2024). Optimisation of multi-rotor wind turbine configurations for maximum performance. (external link)
- Stian Husevik Stavland; Stein-Arild Tjugum; Anders Hallanger et al. (2024). Characterization of multiphase flow through Venturi nozzle using gamma-ray tomography. (external link)
- Vemund Drøsdal Fladstad; Jan Michael Simon Bartl; Bjørn Tore Hjertaker (2024). Improved wake recovery - A comparison of flow measurements behind modified single-rotor and multi-rotor wind turbines. (external link)
- Ragnhild Løyning; Gloria Stenfelt; Bjørn Tore Hjertaker (2024). Numeriske beregninger på vertikalt sensorsystem forankret på dypt vann. (external link)
2010
- Rachid Maad; Bjørn Tore Hjertaker; Geir Anton Johansen et al. (2010). Dynamic characterization of a high speed gamma-ray tomograph. (external link)
- Rachid Maad; Bjørn Tore Hjertaker; Geir Anton Johansen et al. (2010). Dynamic characterization of a high speed gamma-ray tomograph. (external link)
- Stian Stjernberg; Bjørn Tore Hjertaker; Lasse Sivertsen (2010). Tilstandsovervåkning av undervanns motordrift med lange forsyningskabler. (external link)
- Tom Erik Kjenner; Bjørn Tore Hjertaker; Lasse Sivertsen (2010). Tilstandsovervåkning av frekvensstyrt undervannsmotordrift ved strømanalyse. (external link)
- Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2010). Sensation evoked by esophageal distension in functional chest pain patients depends on mechanical stress rather than on ischemia. (external link)
- Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2010). Patients with functional chest pain have a higher wall tone during bag distention. (external link)
- Bjørn Tore Hjertaker; Rachid Maad; Geir Anton Johansen (2010). Static characterization of dual mode capacitance and gamma-ray tomography using the Landweber reconstruction algorithm. (external link)
- Abdul Waheed; Daniel Fregenal; Øyvind Frette et al. (2010). Intra-shell RF-resonances in Li Rydberg atoms. (external link)
2017
- Ørjan Silgjerd; Bjørn Tore Hjertaker; Svein Rune Erga et al. (2017). Videreutvikling av instrumentering - for studier av mikroalgers vertikalmigrasjon under ulike lysforhold. (external link)
- Silvio Melo; Ilker Meric; Fabiano Silva et al. (2017). A Geometric Approach to Spectral Analysis. (external link)
- Geir Anton Johansen; Camilla Sætre; Stein-Arild Tjugum et al. (2017). Tomographic methods for multiphase flow measurement. (external link)
2012
- Silvio Melo; Icaro Moreira; Carlos Dantas et al. (2012). The particle system iterative reconstruction technique in a high speed gamma-ray tomograph. (external link)
- Abdul Waheed; Daniel Fregenal; Øyvind Frette et al. (2012). Suppression of multiphoton intrashell resonances in Li Rydberg atoms. (external link)
- Mahsa Karimi; Bjørn Tore Hjertaker; Kjetil Folgerø (2012). Permittivity measurements using dual open ended coaxial probes. (external link)
- Kristian Frafjord Haarr; Bjørn Tore Hjertaker; Stein Dankert Kolstø (2012). Development of laboratory exercises in instrumentation and process control. (external link)
- Jana Precliková; Daniel Fregenal; Bjørn Tore Hjertaker et al. (2012). Creation of Rydberg wavepackets with femtosecond laser pulses. (external link)
- Jana Preclíková; Mariusz Kozak; Daniel Fregenal et al. (2012). Excitation of Rydberg wave packets with chirped laser pulses. (external link)
- Geir Anton Johansen; Bjørn Tore Hjertaker; Stein Arild Tjugum et al. (2012). Industrial applications of tomographic gamma-ray methods. (external link)
- Åsmund Nedrelid Gjermundrød; Bjørn Tore Hjertaker; Anders Hallanger (2012). Måling av vann i olje/vann-strømning, metoder og usikkerhet. (external link)
- Jana Precliková; Abdul Waheed; Daniel Fregenal et al. (2012). Unidentified transitions in one-photon intrashell dynamics in Rydberg atoms. (external link)
- Bjørn Tore Hjertaker; Rachid Maad; Geir Anton Johansen (2012). Inherent dual mode single energy gamma-ray tomography. (external link)
- Erik Magnus Bruvik; Bjørn Tore Hjertaker; Kjetil Folgerø et al. (2012). Monitoring oil-water mixture separation by time domain reflectometry. (external link)
1994
1995
- G. A. Johansen; T. Frøystein; Bjørn Tore Hjertaker et al. (1995). The development of a dual-mode tomograph for three-component flow imaging. (external link)
- G. A. Johansen; T. Frøystein; Bjørn Tore Hjertaker et al. (1995). Development of dual-mode and capacitance tomography technology (Confidential Appendices to CMR-95-A10002). (external link)
2007
- Erik Johan Stangborli; Bjørn Tore Hjertaker (2007). Acquisition and synchronization of sensor data for mulitiparametric imaging in gastroenterological studies. (external link)
- Rachid Maad; Bjørn Tore Hjertaker; Geir Anton Johansen (2007). Semi-empirical scatter correction models for high speed gamma-ray tomography. (external link)
- Bjørn Tore Hjertaker; Rachid Maad; Ole Andreas Almås et al. (2007). USB-based Data Acquisition and Control System for High Speed Gamma-ray Tomography. (external link)
- Rachid Maad; Bjørn Tore Hjertaker; Geir Anton Johansen (2007). Semi-empirical Scatter Correction Models for High-Speed Gamma-Ray Tomography. (external link)
- Andrew C. Baker; Cato Bjelland; Jarle Spilde et al. (2007). A Novel Subsea On-line Multiphase Fluid Sampling and Analysis System. (external link)
- Bjørn Tore Hjertaker; Rachid Maad; Geir Anton Johansen (2007). USB-based data acquisition and control system for high speed gamma-ray tomography. (external link)
- André Vasdal; Bjørn Tore Hjertaker (2007). High frequency magnetic field sensor for measurement of oil/water fractions. (external link)
2018
- Andreas Soto Peterson; Bjørn Tore Hjertaker; Kjetil Folgerø (2018). Combined thickness and permittivity measurement of layers using an open-ended coaxial probe. (external link)
- Bjørn Tore Hjertaker; Stein-Arild Tjugum; Anders Hallanger et al. (2018). Characterization of multiphase flow blind-T mixing using high speed gamma-ray tomometry. (external link)
2016
- Erik Magnus Bruvik; Bjørn Tore Hjertaker (2016). Liquid characterization and measurement of fluid properties for reduced uncertainty in multiphase flow area fraction measurements. (external link)
- Stein-Arild Tjugum; Bjørn Tore Hjertaker; Rachid Maad et al. (2016). Investigation of Multiphase Flow-Regimes After a Blind-T Mixer and at the Throat of the Venturi – Using Gamma-Ray Tomography and CFD Modelling. (external link)
- Rachid Maad; Stein-Arild Tjugum; Anders Hallanger et al. (2016). Investigation of multiphase flow blind-T mixing effectiveness using high speed gamma-ray tomometry. (external link)
- Nikparvar Bahareh; Bjørn Tore Hjertaker; Kjetil Folgerø (2016). Estimation of Relative Permittivity and Thickness for Dielectric Materials Using an Open-Ended Waveguide Sensor. (external link)
2005
- Bjørn Tore Hjertaker; Stein-Arild Tjugum; Erling A. Hammer et al. (2005). Multimodality tomography for multiphase hydrocarbon flow measurements. (external link)
- Arild Bård Ellingsen; Bjørn Tore Hjertaker (2005). Design og implementering av USB data og kontrollgrensesnitt for prosesstomografi. (external link)
- Geir Anton Johansen; Erling A. Hammer; Bjørn Tore Hjertaker et al. (2005). First experimental results from a dual modality flow imaging system. (external link)
- Stian Husevik Stavland; Bjørn Tore Hjertaker (2005). Bruk av lutralyd til fraksjonsmåling og fluidkarakterisering i Subsea Online Fluid Analyser. (external link)
- Vidar Spord; Bjørn Tore Hjertaker (2005). Oil in water using simple harmonic vibration. (external link)
- Beate Sudmann Berntsen; Bjørn Tore Hjertaker (2005). Utvikling av målekammer for karakterisering av saltvann ved bruk av absorpsjon og spredning av gammastråling. (external link)
2013
- Vårin Renate Andvik Holm; Bjørn Tore Hjertaker; Erik Magnus Bruvik (2013). Detection of CO2 in N2 and H2O using photoacoustics. (external link)
- Zahra Bayati; Bjørn Tore Hjertaker; Kjetil Folgerø (2013). Hydrate Monitoring using Capacitive Sensors. (external link)
- Jana Preclíková; Martin Kozak; Daniel Fregenal et al. (2013). Quantum coherent interactions of Rydberg atoms with controlled sequences of femtosecond laser pulses. (external link)
- Richard Thorn; Geir Anton Johansen; Bjørn Tore Hjertaker (2013). Three-phase flow measurement in the petroleum industry. (external link)
2021
- Ryan Spelay; Reza Hashemi; Sean Sanders et al. (2021). Improved scatter correction model for high attenuation gamma-ray tomography measurements. (external link)
- Reza Hashemi; Ryan Spelay; Sean Sanders et al. (2021). A novel method to improve Electrical Resistance Tomography measurements on slurries containing clays. (external link)
- Geir Anton Johansen; Bjørn Tore Hjertaker; Reza Hashemi et al. (2021). Tomographic gamma-ray imaging of industrial processes and equipment. (external link)
2019
- Stian Husevik Stavland; Camilla Sætre; Bjørn Tore Hjertaker et al. (2019). Gas fraction measurements using single and dual beam gamma-densitometry for two phase gas-liquid pipe flow. (external link)
- Erik Wangen Alsaker; Martin Rytír; Bjørn Tore Hjertaker (2019). Kvantifisering av troposfæriske effecter i satellittkommunikasjon ved bruk av numeriske værprodukter. (external link)
- Otto Andreas Moe; Boris Balakin; Bjørn Tore Hjertaker (2019). Digital twin of a hydraulic accumulator for virtual detection of subsea leaks. (external link)
2020
- Joakim Nyland; Thomas Impelluso; Bjørn Tore Hjertaker (2020). Implementation of hydrodynamic forces into the Moving Frame Method for analysis of multi-body wave energy converters. (external link)
- Stian Husevik Stavland; Yessica Alexandra Arellano Prieto; Andy Hunt et al. (2020). Multimodal Two-Phase Flow Measurement Using Dual Plane ECT and GRT. (external link)
2008
- Karl Kristian Olsen; Bjørn Tore Hjertaker (2008). Automatisering og optimalisering av fortrengningseksperimenter i oppsprukne reservoarbergarter. (external link)
- Yngve Bøe; Bjørn Tore Hjertaker; Ole Brix (2008). Measurements and simulations of electrical conductivity in live fish. (external link)
- Erik Schuster; Bjørn Tore Hjertaker (2008). Datainnsamlingskontroller for høyhastighets-gammastråletomograf basert på USB- og Ethernet-grensesnitt. (external link)
- Bjørn Tore Hjertaker; Rachid Maad; Erik Schuster et al. (2008). A data acquisition and control system for high-speed gamma-ray tomography. (external link)
- Rachid Maad; Bjørn Tore Hjertaker; Geir Anton Johansen (2008). Semi-empirical scatter correction model for high-speed gamma-ray tomography. (external link)
- Erik Magnus Bruvik; Andrew Baker; Cato Bjelland et al. (2008). A novel subsea on-line multiphase fluid sampling and analysis system. (external link)
- Geir Anton Johansen; Uwe Hampel; Bjørn Tore Hjertaker (2008). Flow imaging by high speed transmission tomography. (external link)
2009
- Eivind Lyng Soldal; Bjørn Tore Hjertaker (2009). Elektrisk og akustisk monitorering og diagnostisering av undervannspumpe. (external link)
- Erik Magnus Bruvik; Marie Bueie Holstad; Jarle Spilde et al. (2009). Fluid characterisation in a subsea on-line multiphase fluid sampling and analysis system. (external link)
- Erik Magnus Bruvik; Bjørn Tore Hjertaker (2009). Characterization of on-line fluid sampling using gamma-ray tomography. (external link)