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Bjørn Tore Hjertaker's picture

Bjørn Tore Hjertaker

Professor
  • E-mailBjorn.Hjertaker@uib.no
  • Phone+47 55 58 27 82
  • Visitor Address
    Allegt. 55
    Room 
    208
  • Postal Address
    Postboks 7803
    5020 BERGEN

PHYS225 "Measurement Technology"

PHYS327 "Laboratory Course in Instrumentation and Process Control"

PHYS114 "Basic Measurement Science and Experimental Physics"

  • Glesnes, Odd Marius Stubbe. 2019. The dynamic behavior of a closed fish farm.
  • Haugsdal, Rene. 2019. MRI compatible miniature motor system: Proof of Concept.
  • Alsaker, Erik Wangen. 2019. Kvantifisering av troposfæriske effecter i satellittkommunikasjon ved bruk av numeriske værprodukter.
  • Stavland, Stian Husevik; Sætre, Camilla; Hjertaker, Bjørn Tore; Tjugum, Stein-Arild; Hallanger, Anders; Maad, Rachid. 2019. Gas fraction measurements using single and dual beam gamma-densitometry for two phase gas-liquid pipe flow. IEEE Instrumentation and Measurement Technology Conference. Proceedings. 1-6.
  • Riple, Håkon Lerøy. 2019. Dynamisk analyse og levetidsberegning på utviklingsprosjektet «Havliljen».
  • Moe, Otto Andreas. 2019. Digital twin of a hydraulic accumulator for virtual detection of subsea leaks.
  • Høyven, Thomas Skinlo. 2019. Bending moments and collision loads between a floating offshore wind turbine and a supporting barge.
  • Stavland, Stian Husevik; Tjugum, Stein-Arild; Hallanger, Anders; Maad, Rachid; Hjertaker, Bjørn Tore. 2018. Investigation of Venturi constriction characteristics in multiphase flow using high speed gamma-ray tomography.
  • Spelay, Ryan; Hashemi, Reza; Sanders, Sean; Hjertaker, Bjørn Tore. 2018. Improved backscatter correction model for high attenuation gamma-ray tomography measurements.
  • Spjeld, Cato. 2018. Identifikasjon av undervannsobjekter ved bruk av ultralyd.
  • Hashemi, Reza; Spelay, Ryan; Sanders, Sean; Hjertaker, Bjørn Tore. 2018. Comparison of Different Tomography Method Measurements on Clay Based Slurry Pipeline Systems.
  • Peterson, Andreas Soto. 2018. Combined thickness and permittivity measurement of layers using an open-ended coaxial probe.
  • Hjertaker, Bjørn Tore; Tjugum, Stein-Arild; Hallanger, Anders; Maad, Rachid. 2018. Characterization of multiphase flow blind-T mixing using high speed gamma-ray tomometry. Flow Measurement and Instrumentation. 205-212.
  • Silgjerd, Ørjan. 2017. Videreutvikling av instrumentering for studier av mikroalgers vertikalmigrasjon under ulike lysforhold.
  • Johansen, Geir Anton; Sætre, Camilla; Tjugum, Stein-Arild; Hjertaker, Bjørn Tore. 2017. Tomographic methods for multiphase flow measurement.
  • Frette, Kristian. 2017. Optisk goniometer for optimalisering av retningsbestemt solenergi.
  • Melo, Silvio; Meric, Ilker; Silva, Fabiano; Dantas, Carlos; Sølie, Jarle Rambo; Johansen, Geir Anton; Hjertaker, Bjørn Tore; Barros, Bruno. 2017. A Geometric Approach to Spectral Analysis.
  • Grimsbø, Endre; Nortvedt, Ragnar; Hjertaker, Bjørn Tore; Hammer, Erling; Roth, Bjørn. 2016. Optimal AC frequency range for electro-stunning of Atlantic salmon (Salmo salar). Aquaculture. 283-288.
  • Bruvik, Erik Magnus; Hjertaker, Bjørn Tore. 2016. Liquid characterization and measurement of fluid properties for reduced uncertainty in multiphase flow area fraction measurements. Flow Measurement and Instrumentation. 10-18.
  • Maad, Rachid; Tjugum, Stein-Arild; Hallanger, Anders; Hjertaker, Bjørn Tore. 2016. Investigation of multiphase flow blind-T mixing effectiveness using high speed gamma-ray tomometry.
  • Tjugum, Stein-Arild; Hjertaker, Bjørn Tore; Maad, Rachid; Hallanger, Anders; Leeungculsatien, Teerachai. 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.
  • Bahareh, Nikparvar. 2016. Estimation of Relative Permittivity and Thickness for Dielectric Materials Using an Open-Ended Waveguide Sensor.
  • Li, Mang. 2015. Near Surface Petrochemical Sensing Using Coplanar Waveguides.
  • Naustdal, Sigve. 2015. A study of the Coriolis flowmeter as a reference instrument in multiphase flow.
  • Johansen, Geir Anton; Meric, Ilker; Maad, Rachid; Bruvik, Erik Magnus; Hjertaker, Bjørn Tore; Sætre, Camilla. 2014. Non-destructive monitoring of multiphase hydrocarbon flow by high-speed gamma-ray tomography.
  • Preclíková, Jana; Kozak, Martin; Fregenal, Daniel; Hjertaker, Bjørn Tore; Hamre, Børge; Frette, Øyvind; Kocbach, Ladislav; Hansen, Jan Petter. 2014. Coherent control of superposition of atomic Rydberg states with femtosecond laser pulses.
  • Thorn, Richard; Johansen, Geir Anton; Hjertaker, Bjørn Tore. 2013. Three-phase flow measurement in the petroleum industry. 17 pages.
  • Preclíková, Jana; Kozak, Martin; Fregenal, Daniel; Hjertaker, Bjørn Tore; Hamre, Børge; Frette, Øyvind; Kocbach, Ladislav; Hansen, Jan Petter. 2013. Quantum coherent interactions of Rydberg atoms with controlled sequences of femtosecond laser pulses.
  • Fotland, Sindre. 2013. Instrumentering av eksperimentell vannkolonne for studier av mikroalgers vertikalforflytning.
  • Bayati, Zahra. 2013. Hydrate Monitoring using Capacitive Sensors.
  • Holm, Vårin Renate Andvik. 2013. Detection of CO2 in N2 and H2O using photoacoustics.
  • Precliková, Jana; Waheed, Abdul; Fregenal, Daniel; Frette, Øyvind; Hamre, Børge; Hjertaker, Bjørn Tore; Horsdal, Erik; Pilskog, Ingjald; Førre, Morten. 2012. Unidentified transitions in one-photon intrashell dynamics in Rydberg atoms. Physical Review A. Atomic, Molecular, and Optical Physics (PRA). 4 pages.
  • Melo, Silvio; Moreira, Icaro; Dantas, Carlos; Johansen, Geir Anton; Hjertaker, Bjørn Tore; Maad, Rachid. 2012. The particle system iterative reconstruction technique in a high speed gamma-ray tomograph.
  • Waheed, Abdul; Fregenal, Daniel; Frette, Øyvind; Førre, Morten; Hjertaker, Bjørn Tore; Horsdal, Erik; Pilskog, Ingjald; Preclíková, Jana. 2012. Suppression of multiphoton intrashell resonances in Li Rydberg atoms. Journal of Physics: Conference Series. 1 pages.
  • Karimi, Mahsa. 2012. Permittivity measurements using dual open ended coaxial probes.
  • Gjermundrød, Åsmund Nedrelid. 2012. Måling av vann i olje/vann-strømning, metoder og usikkerhet.
  • Bruvik, Erik Magnus; Hjertaker, Bjørn Tore; Folgerø, Kjetil; Meyer, Sigrid Katharina. 2012. Monitoring oil-water mixture separation by time domain reflectometry. Measurement science and technology. 12 pages.
  • Hjertaker, Bjørn Tore; Maad, Rachid; Johansen, Geir Anton. 2012. Inherent dual mode single energy gamma-ray tomography.
  • Johansen, Geir Anton; Hjertaker, Bjørn Tore; Tjugum, Stein Arild; Bruvik, Erik Magnus; Maad, Rachid; Sætre, Camilla; Thorn, Richard. 2012. Industrial applications of tomographic gamma-ray methods.
  • Preclíková, Jana; Kozak, Mariusz; Fregenal, Daniel; Frette, Øyvind; Hamre, Børge; Hjertaker, Bjørn Tore; Hansen, Jan Petter; Kocbach, Ladislav. 2012. Excitation of Rydberg wave packets with chirped laser pulses. Physical Review A. Atomic, Molecular, and Optical Physics (PRA). 8 pages.
  • Haarr, Kristian Frafjord. 2012. Development of laboratory exercises in instrumentation and process control.
  • Precliková, Jana; Fregenal, Daniel; Hjertaker, Bjørn Tore; Hamre, Børge; kozak, martin; Frette, Øyvind. 2012. Creation of Rydberg wavepackets with femtosecond laser pulses.
  • Sivertsen, Lasse; Hjertaker, Bjørn Tore; Kjenner, Tom Erik; Stjernberg, Stian. 2012. Condition monitoring of subsea electrical equipment using motor current signature analysis. EPE Journal : European Power Electronics and Drives Journal. 28-36.
  • Sivertsen, Lasse; Hjertaker, Bjørn Tore; Kjenner, Tom Erik; Stjernberg, Stian. 2011. Tilstandsovervåkning av frekvensdriftede motorer med lange forsyningskabler ved bruk av motorstrøm signaturanalyse.
  • Waheed, Abdul; Fregenal, Daniel; Frette, Øyvind; Førre, Morten; Hjertaker, Bjørn Tore; Horsdal, Erik; Hamre, Børge; Pilskog, Ingjald; Precliková, Jana. 2011. Suppression of multiphoton intrashell resonances in Li Rydberg atoms.
  • Waheed, Abdul; Fregenal, Daniel; Frette, Øyvind; Førre, Morten; Hjertaker, Bjørn Tore; Horsdal, Erik; Pilskog, Ingjald; Precliková, Jana. 2011. Suppression of multiphoton intrashell resonances in Li Rydberg atoms. Physical Review A. Atomic, Molecular, and Optical Physics (PRA).
  • Hjertaker, Bjørn Tore; Maad, Rachid; Johansen, Geir Anton. 2011. Dual-mode capacitance and gamma-ray tomography using the Landweber reconstruction algorithm. Measurement science and technology. 7 pages.
  • Haukalid, Kjetil. 2011. Den coplanare bølgelederen som permittivitetssensor.
  • Stjernberg, Stian. 2010. Tilstandsovervåkning av undervanns motordrift med lange forsyningskabler.
  • Kjenner, Tom Erik. 2010. Tilstandsovervåkning av frekvensstyrt undervannsmotordrift ved strømanalyse.
  • Hjertaker, Bjørn Tore; Maad, Rachid; Johansen, Geir Anton. 2010. Static characterization of dual mode capacitance and gamma-ray tomography using the Landweber reconstruction algorithm.
  • Hoff, Dag Arne Lihaug; Gregersen, Hans; Ødegaard, Svein; Hjertaker, Bjørn Tore; Hatlebakk, Jan Gunnar. 2010. Sensation evoked by esophageal distension in functional chest pain patients depends on mechanical stress rather than on ischemia. Neurogastroenterology and Motility. 1170-+.
  • Hoff, Dag Arne Lihaug; Hoff, DAL; Gregersen, Hans; Ødegaard, Svein; Hjertaker, Bjørn Tore; Hatlebakk, Jan Gunnar. 2010. Patients with functional chest pain have an increased oesophageal wall tone during bag distension. Scandinavian Journal of Gastroenterology. 45-45.
  • Waheed, Abdul; Fregenal, Daniel; Frette, Øyvind; Hjertaker, Bjørn Tore; Horsdal, Erik. 2010. Intra-shell RF-resonances in Li Rydberg atoms.
  • Bruvik, Erik Magnus; Hjertaker, Bjørn Tore; Hallanger, Anders. 2010. Gamma-ray tomography applied to hydro-carbon multi-phase sampling and slip measurements. Flow Measurement and Instrumentation. 240-248.
  • Johansen, Geir Anton; Hampel, Uwe; Hjertaker, Bjørn Tore. 2010. Flow imaging by high speed transmission tomography. Applied Radiation and Isotopes. 518-524.
  • Maad, Rachid; Hjertaker, Bjørn Tore; Johansen, Geir Anton; Olsen, Øystein. 2010. Dynamic characterization of a high speed gamma-ray tomograph. Flow Measurement and Instrumentation. 538-545.
  • Maad, Rachid; Hjertaker, Bjørn Tore; Johansen, Geir Anton; Olsen, Øystein. 2010. Dynamic characterization of a high speed gamma-ray tomograph.
  • Meyer, Sigrid Katharina. 2009. Måling av permittivitet og væskenivå i et testkammer for hydrokarbon væske ved hjelp av Time Domain Reflectometry (TDR).
  • Bruvik, Erik Magnus; Holstad, Marie Bueie; Spilde, Jarle; Hjertaker, Bjørn Tore; Stavland, Stian Husevik; Frøysa, Kjell-Eivind; Meyer, Sigrid Katharina. 2009. Fluid characterisation in a subsea on-line multiphase fluid sampling and analysis system.
  • Soldal, Eivind Lyng. 2009. Elektrisk og akustisk monitorering og diagnostisering av undervannspumpe.
  • Bruvik, Erik Magnus; Hjertaker, Bjørn Tore. 2009. Characterization of on-line fluid sampling using gamma-ray tomography.
  • Maad, Rachid; Hjertaker, Bjørn Tore; Johansen, Geir Anton. 2008. Semi-empirical scatter correction model for high-speed gamma-ray tomography. Measurement science and technology. 6 pages.
  • Steffensen, Pål. 2008. Mulitiparametrisk monitorering av spiserøret og programutvikling for biomekaniske studier av organet.
  • Bøe, Yngve. 2008. Measurements and simulations of electrical conductivity in live fish.
  • Hjertaker, Bjørn Tore; Johansen, Geir Anton. 2008. High speed gamma-ray tomography for hydrocarbon flow applications.
  • Johansen, Geir Anton; Hampel, Uwe; Hjertaker, Bjørn Tore. 2008. Flow imaging by high speed transmission tomography.
  • Schuster, Erik. 2008. Datainnsamlingskontroller for høyhastighets-gammastråletomograf basert på USB- og Ethernet-grensesnitt.
  • Olsen, Karl Kristian. 2008. Automatisering og optimalisering av fortrengningseksperimenter i oppsprukne reservoarbergarter.
  • Bruvik, Erik Magnus; Baker, Andrew; Bjelland, Cato; Spilde, Jarle; Frøysa, Kjell-Eivind; Holstad, Marie Bueie; Johansen, Geir Anton; Hjertaker, Bjørn Tore; Berntsen, Beate Sudmann; Stavland, Stian Husevik. 2008. A novel subsea on-line multiphase fluid sampling and analysis system.
  • Hjertaker, Bjørn Tore; Maad, Rachid; Schuster, Erik; Almås, Ole Andreas; Johansen, Geir Anton. 2008. A data acquisition and control system for high-speed gamma-ray tomography. Measurement science and technology. 9 pages.
  • Hjertaker, Bjørn Tore; Maad, Rachid; Johansen, Geir Anton. 2007. USB-based data acquisition and control system for high speed gamma-ray tomography.
  • Hjertaker, Bjørn Tore; Maad, Rachid; Almås, Ole Andreas; Johansen, Geir Anton. 2007. USB-based Data Acquisition and Control System for High Speed Gamma-ray Tomography.
  • Maad, Rachid; Hjertaker, Bjørn Tore; Johansen, Geir Anton. 2007. Semi-empirical scatter correction models for high speed gamma-ray tomography.
  • Maad, Rachid; Hjertaker, Bjørn Tore; Johansen, Geir Anton. 2007. Semi-empirical Scatter Correction Models for High-Speed Gamma-Ray Tomography.
  • Grimsbø, Endre. 2007. Instrumentation of swim tunnels and conductivity measurement of fish.
  • Vasdal, André. 2007. High frequency magnetic field sensor for measurement of oil/water fractions.
  • Stangborli, Erik Johan. 2007. Acquisition and synchronization of sensor data for mulitiparametric imaging in gastroenterological studies.
  • Baker, Andrew C.; Bjelland, Cato; Spilde, Jarle; Frøysa, Kjell-Eivind; Holstad, Marie Bueie; Johansen, Geir Anton; Hjertaker, Bjørn Tore; Berntsen, Beate Sudmann; Stian, Husevik Stavland. 2007. A Novel Subsea On-line Multiphase Fluid Sampling and Analysis System.
  • Fimreite, Anne Lise; Hjertaker, Bjørn Tore. 2006. Sammenligning av eksisterende mastergradsveiledning ved Institutt for administrasjons- og organisasjonsvitenskap og Institutt for fysikk og teknologi. UPED-skrift.
  • Fimreite, Anne Lise; Hjertaker, Bjørn Tore. 2006. Sammenlignende studie av mastergradsveiledning ved to institutt. 19 pages.
  • Hjertaker, Bjørn Tore. 2006. Midtveiseksamen basert på flervalgsoppgaver ved Institutt for fysikk og teknologi, Universitetet i Bergen. UNIPED (Tromsø). 4-12.
  • Kongsli, Jonas; Hjertaker, Bjørn Tore; Frøystein, Torbjørn. 2006. Evaluation of power and phase accuracy of the BSD Dodek amplifier for regional hyperthermia using an external vector voltmeter measurement system. International Journal of Hyperthermia. 657-671.
  • Fimreite, Anne Lise; Hjertaker, Bjørn Tore. 2006. En refleksiv modell for mastergradsveiledning. UPED-skrift.
  • Almås, Ole Andreas. 2006. Design og implementering av datainnsamlingsenhet for gammatomograf.
  • Dyakowski, Tom; Johansen, Geir Anton; Hjertaker, Bjørn Tore; Sankowski, Dominik; Mosorov, Volodymyr; Wlodarczyk, Jaroslaw. 2006. A dual modality tomography system for imaging gas/solids flows. Particle & particle systems characterization. 260-265.
  • Nøttveit, Gunnar. 2006. A LabVIEW implemented digital Multi Channel Analyzer (MCA).
  • Berntsen, Beate Sudmann. 2005. Utvikling av målekammer for karakterisering av saltvann ved bruk av absorpsjon og spredning av gammastråling.
  • Spord, Vidar. 2005. Oil in water using simple harmonic vibration.
  • Corneliussen, S; Hjertaker, Bjørn Tore; Hodgson, S; Johansen, Geir Anton; Moksnes, P O; Olsen, Øystein; Viken, P. 2005. Multiphase metering.
  • Hjertaker, Bjørn Tore; Tjugum, Stein-Arild; Hammer, Erling A.; Johansen, Geir Anton. 2005. Multimodality tomography for multiphase hydrocarbon flow measurements. IEEE Sensors Journal. 153-160.
  • Hjertaker, Bjørn Tore; Johansen, Geir Anton; Cimpan, Emil; Maad, Rachid; Hammer, Erling. 2005. First experimental results of multiphase hydrocarbon flow monitoring using dual modality gamma-ray tomography and high frequency magnetic field sensors.
  • Hjertaker, Bjørn Tore; Johansen, Geir Anton; Cimpan, Emil; Maad, Rachid; Hammer, Erling. 2005. First experimental results of multiphase hydrocarbon flow monitoring using dual modality gamma-ray tomography and high frequency magnetic field sensors.
  • Johansen, Geir Anton; Hammer, Erling A.; Hjertaker, Bjørn Tore; Maad, Rachid; Cimpan, Emil. 2005. First experimental results from a dual modality flow imaging system.
  • Ellingsen, Arild Bård. 2005. Design og implementering av USB data og kontrollgrensesnitt for prosesstomografi.
  • Stavland, Stian Husevik. 2005. Bruk av lutralyd til fraksjonsmåling og fluidkarakterisering i Subsea Online Fluid Analyser.
  • Dyakowski, Tom; Johansen, Geir Anton; Hjertaker, Bjørn Tore; Sankowski, Dominic; Mosorov, Vladomir; Wlodarczyk, J. 2005. A dual modality tomography system for imaging gas/solids flows.
  • Hjertaker, Bjørn Tore; Tjugum, Stein-Arild; Hammer, Erling A.; Johansen, Geir Anton. 2004. Advances in multi modality tomography for multiphase hydrocarbon flow.
  • Hjertaker, Bjørn Tore. 1998. Static characterization of a dual sensor flow imaging system. Flow Measurement and Instrumentation. 183-191.
  • Hjertaker, Bjørn Tore. 1998. Multiphase flow imaging by dual mode tomography. -.

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