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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
    Allégaten 55
    Room 
    208
  • Postal Address
    Postboks 7803
    5020 BERGEN
  • Show author(s) (2020). Multimodal analysis of gas-oil intermittent structures in co-current horizontal flow.
  • Show author(s) (2020). Multimodal Two-Phase Flow Measurement Using Dual Plane ECT and GRT. IEEE Transactions on Instrumentation and Measurement.
  • Show author(s) (2020). Implementation of hydrodynamic forces into the Moving Frame Method for analysis of multi-body wave energy converters.
  • Show author(s) (2019). The dynamic behavior of a closed fish farm.
  • Show author(s) (2019). MRI compatible miniature motor system: Proof of Concept.
  • Show author(s) (2019). Kvantifisering av troposfæriske effecter i satellittkommunikasjon ved bruk av numeriske værprodukter.
  • Show author(s) (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.
  • Show author(s) (2019). Dynamisk analyse og levetidsberegning på utviklingsprosjektet «Havliljen».
  • Show author(s) (2019). Digital twin of a hydraulic accumulator for virtual detection of subsea leaks.
  • Show author(s) (2019). Bending moments and collision loads between a floating offshore wind turbine and a supporting barge.
  • Show author(s) (2018). Investigation of Venturi constriction characteristics in multiphase flow using high speed gamma-ray tomography.
  • Show author(s) (2018). Improved backscatter correction model for high attenuation gamma-ray tomography measurements.
  • Show author(s) (2018). Identifikasjon av undervannsobjekter ved bruk av ultralyd.
  • Show author(s) (2018). Comparison of Different Tomography Method Measurements on Clay Based Slurry Pipeline Systems.
  • Show author(s) (2018). Combined thickness and permittivity measurement of layers using an open-ended coaxial probe.
  • Show author(s) (2018). Characterization of multiphase flow blind-T mixing using high speed gamma-ray tomometry. Flow Measurement and Instrumentation. 205-212.
  • Show author(s) (2017). Videreutvikling av instrumentering for studier av mikroalgers vertikalmigrasjon under ulike lysforhold.
  • Show author(s) (2017). Tomographic methods for multiphase flow measurement.
  • Show author(s) (2017). Optisk goniometer for optimalisering av retningsbestemt solenergi.
  • Show author(s) (2017). A Geometric Approach to Spectral Analysis.
  • Show author(s) (2016). Optimal AC frequency range for electro-stunning of Atlantic salmon (Salmo salar). Aquaculture. 283-288.
  • Show author(s) (2016). Liquid characterization and measurement of fluid properties for reduced uncertainty in multiphase flow area fraction measurements. Flow Measurement and Instrumentation. 10-18.
  • Show author(s) (2016). Investigation of multiphase flow blind-T mixing effectiveness using high speed gamma-ray tomometry.
  • Show author(s) (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.
  • Show author(s) (2016). Estimation of Relative Permittivity and Thickness for Dielectric Materials Using an Open-Ended Waveguide Sensor.
  • Show author(s) (2015). Near Surface Petrochemical Sensing Using Coplanar Waveguides.
  • Show author(s) (2015). A study of the Coriolis flowmeter as a reference instrument in multiphase flow.
  • Show author(s) (2014). Non-destructive monitoring of multiphase hydrocarbon flow by high-speed gamma-ray tomography.
  • Show author(s) (2014). Coherent control of superposition of atomic Rydberg states with femtosecond laser pulses.
  • Show author(s) (2013). Three-phase flow measurement in the petroleum industry. Measurement Science and Technology. 17 pages.
  • Show author(s) (2013). Quantum coherent interactions of Rydberg atoms with controlled sequences of femtosecond laser pulses.
  • Show author(s) (2013). Instrumentering av eksperimentell vannkolonne for studier av mikroalgers vertikalforflytning.
  • Show author(s) (2013). Hydrate Monitoring using Capacitive Sensors.
  • Show author(s) (2013). Detection of CO2 in N2 and H2O using photoacoustics.
  • Show author(s) (2012). Unidentified transitions in one-photon intrashell dynamics in Rydberg atoms. Physical Review A. Atomic, Molecular, and Optical Physics (PRA). 4 pages.
  • Show author(s) (2012). The particle system iterative reconstruction technique in a high speed gamma-ray tomograph.
  • Show author(s) (2012). Suppression of multiphoton intrashell resonances in Li Rydberg atoms. Journal of Physics: Conference Series (JPCS). 1 pages.
  • Show author(s) (2012). Permittivity measurements using dual open ended coaxial probes.
  • Show author(s) (2012). Måling av vann i olje/vann-strømning, metoder og usikkerhet.
  • Show author(s) (2012). Monitoring oil-water mixture separation by time domain reflectometry. Measurement Science and Technology. 12 pages.
  • Show author(s) (2012). Inherent dual mode single energy gamma-ray tomography.
  • Show author(s) (2012). Industrial applications of tomographic gamma-ray methods.
  • Show author(s) (2012). Excitation of Rydberg wave packets with chirped laser pulses. Physical Review A. Atomic, Molecular, and Optical Physics (PRA). 8 pages.
  • Show author(s) (2012). Development of laboratory exercises in instrumentation and process control.
  • Show author(s) (2012). Creation of Rydberg wavepackets with femtosecond laser pulses.
  • Show author(s) (2012). Condition monitoring of subsea electrical equipment using motor current signature analysis. EPE Journal: European Power Electronics and Drives. 28-36.
  • Show author(s) (2011). Tilstandsovervåkning av frekvensdriftede motorer med lange forsyningskabler ved bruk av motorstrøm signaturanalyse.
  • Show author(s) (2011). Suppression of multiphoton intrashell resonances in Li Rydberg atoms.
  • Show author(s) (2011). Suppression of multiphoton intrashell resonances in Li Rydberg atoms. Physical Review A. Atomic, Molecular, and Optical Physics (PRA).
  • Show author(s) (2011). Dual-mode capacitance and gamma-ray tomography using the Landweber reconstruction algorithm. Measurement Science and Technology. 7 pages.
  • Show author(s) (2011). Den coplanare bølgelederen som permittivitetssensor.
  • Show author(s) (2010). Tilstandsovervåkning av undervanns motordrift med lange forsyningskabler.
  • Show author(s) (2010). Tilstandsovervåkning av frekvensstyrt undervannsmotordrift ved strømanalyse.
  • Show author(s) (2010). Static characterization of dual mode capacitance and gamma-ray tomography using the Landweber reconstruction algorithm.
  • Show author(s) (2010). Sensation evoked by esophageal distension in functional chest pain patients depends on mechanical stress rather than on ischemia. Neurogastroenterology and Motility. 1170-+.
  • Show author(s) (2010). Patients with functional chest pain have an increased oesophageal wall tone during bag distension. Scandinavian Journal of Gastroenterology. 45-45.
  • Show author(s) (2010). Intra-shell RF-resonances in Li Rydberg atoms.
  • Show author(s) (2010). Gamma-ray tomography applied to hydro-carbon multi-phase sampling and slip measurements. Flow Measurement and Instrumentation. 240-248.
  • Show author(s) (2010). Flow imaging by high speed transmission tomography. Applied Radiation and Isotopes. 518-524.
  • Show author(s) (2010). Dynamic characterization of a high speed gamma-ray tomograph.
  • Show author(s) (2010). Dynamic characterization of a high speed gamma-ray tomograph. Flow Measurement and Instrumentation. 538-545.
  • Show author(s) (2009). Måling av permittivitet og væskenivå i et testkammer for hydrokarbon væske ved hjelp av Time Domain Reflectometry (TDR).
  • Show author(s) (2009). Fluid characterisation in a subsea on-line multiphase fluid sampling and analysis system.
  • Show author(s) (2009). Elektrisk og akustisk monitorering og diagnostisering av undervannspumpe.
  • Show author(s) (2009). Characterization of on-line fluid sampling using gamma-ray tomography.
  • Show author(s) (2008). Semi-empirical scatter correction model for high-speed gamma-ray tomography. Measurement Science and Technology. 6 pages.
  • Show author(s) (2008). Mulitiparametrisk monitorering av spiserøret og programutvikling for biomekaniske studier av organet.
  • Show author(s) (2008). Measurements and simulations of electrical conductivity in live fish.
  • Show author(s) (2008). High speed gamma-ray tomography for hydrocarbon flow applications.
  • Show author(s) (2008). Flow imaging by high speed transmission tomography.
  • Show author(s) (2008). Datainnsamlingskontroller for høyhastighets-gammastråletomograf basert på USB- og Ethernet-grensesnitt.
  • Show author(s) (2008). Automatisering og optimalisering av fortrengningseksperimenter i oppsprukne reservoarbergarter.
  • Show author(s) (2008). A novel subsea on-line multiphase fluid sampling and analysis system.
  • Show author(s) (2008). A data acquisition and control system for high-speed gamma-ray tomography. Measurement Science and Technology. 9 pages.
  • Show author(s) (2007). USB-based data acquisition and control system for high speed gamma-ray tomography.
  • Show author(s) (2007). USB-based Data Acquisition and Control System for High Speed Gamma-ray Tomography.
  • Show author(s) (2007). Semi-empirical scatter correction models for high speed gamma-ray tomography.
  • Show author(s) (2007). Semi-empirical Scatter Correction Models for High-Speed Gamma-Ray Tomography.
  • Show author(s) (2007). Instrumentation of swim tunnels and conductivity measurement of fish.
  • Show author(s) (2007). High frequency magnetic field sensor for measurement of oil/water fractions.
  • Show author(s) (2007). Acquisition and synchronization of sensor data for mulitiparametric imaging in gastroenterological studies.
  • Show author(s) (2007). A Novel Subsea On-line Multiphase Fluid Sampling and Analysis System.
  • Show author(s) (2006). Sammenligning av eksisterende mastergradsveiledning ved Institutt for administrasjons- og organisasjonsvitenskap og Institutt for fysikk og teknologi. UPED-skrift.
  • Show author(s) (2006). Sammenlignende studie av mastergradsveiledning ved to institutt. 19 pages.
  • Show author(s) (2006). Midtveiseksamen basert på flervalgsoppgaver ved Institutt for fysikk og teknologi, Universitetet i Bergen. UNIPED. 4-12.
  • Show author(s) (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.
  • Show author(s) (2006). En refleksiv modell for mastergradsveiledning. UPED-skrift.
  • Show author(s) (2006). Design og implementering av datainnsamlingsenhet for gammatomograf.
  • Show author(s) (2006). A dual modality tomography system for imaging gas/solids flows. Particle & Particle Systems Characterization. 260-265.
  • Show author(s) (2006). A LabVIEW implemented digital Multi Channel Analyzer (MCA).
  • Show author(s) (2005). Utvikling av målekammer for karakterisering av saltvann ved bruk av absorpsjon og spredning av gammastråling.
  • Show author(s) (2005). Oil in water using simple harmonic vibration.
  • Show author(s) (2005). Multiphase metering.
  • Show author(s) (2005). Multimodality tomography for multiphase hydrocarbon flow measurements. IEEE Sensors Journal. 153-160.
  • Show author(s) (2005). First experimental results of multiphase hydrocarbon flow monitoring using dual modality gamma-ray tomography and high frequency magnetic field sensors.
  • Show author(s) (2005). First experimental results of multiphase hydrocarbon flow monitoring using dual modality gamma-ray tomography and high frequency magnetic field sensors.
  • Show author(s) (2005). First experimental results from a dual modality flow imaging system.
  • Show author(s) (2005). Design og implementering av USB data og kontrollgrensesnitt for prosesstomografi.
  • Show author(s) (2005). Bruk av lutralyd til fraksjonsmåling og fluidkarakterisering i Subsea Online Fluid Analyser.
  • Show author(s) (2005). A dual modality tomography system for imaging gas/solids flows.

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