Browsing Bergen Open Research Archive by Author "Kristoffersen, Arne Skodvin"
Now showing items 1-10 of 10
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Analysis of multiple scattering errors in LISST-VSF volume scattering function measurements using Monte Carlo simulations and experimental data
Ugulen, Håvard Stavn; Sandven, Håkon; Hamre, Børge; Kristoffersen, Arne Skodvin; Sætre, Camilla (Journal article; Peer reviewed, 2021)A Monte Carlo algorithm has been developed to investigate the effects of multiple scattering on the volume scattering function measured by the LISST-VSF instrument. The developed algorithm is compared to experimental results ... -
Chlorophyll a fluorescence lifetime reveals reversible UV-induced photosynthetic activity in the green algae Tetraselmis
Kristoffersen, Arne Skodvin; Hamre, Børge; Frette, Øyvind; Erga, Svein Rune (Peer reviewed; Journal article, 2015)The fluorescence lifetime is a very useful parameter for investigating biological materials on the molecular level as it is mostly independent of the fluorophore concentration. The green alga Tetraselmis blooms in summer, ... -
Efficient Monte Carlo simulation reveals significant multiple scattering errors in underwater angular scattering measurements
Ugulen, Håvard Stavn; Sandven, Håkon; Hamre, Børge; Kristoffersen, Arne Skodvin; Sætre, Camilla (Journal article; Peer reviewed, 2022)Multiple scattering can severely affect the accuracy of optical instrumentation. Variance reduction methods have been implemented to improve a Monte Carlo model developed to simulate volume scattering functions measured ... -
In situ measurements of the volume scattering function with LISST-VSF and LISST-200X in extreme environments: evaluation of instrument calibration and validity
Sandven, Håkon; Kristoffersen, Arne Skodvin; Hamre, Børge; Chen, Yi-Chun (Journal article; Peer reviewed, 2020)The LISST-VSF and LISST-200X are commercial instruments made available in recent years, enabling underwater measurements of the volume scattering function, which has not been routinely measured in situ due to lack of ... -
Neural network approach for correction of multiple scattering errors in the LISST-VSF instrument
Ugulen, Håvard Stavn; Koestner, Daniel Warren; Sandven, Håkon Johan; Hamre, Børge; Kristoffersen, Arne Skodvin; Sætre, Camilla (Journal article; Peer reviewed, 2023)The LISST-VSF is a commercially developed instrument used to measure the volume scattering function (VSF) and attenuation coefficient in natural waters, which are important for remote sensing, environmental monitoring and ... -
Polycrystalline Diamond Coating on Orthopedic Implants: Realization and Role of Surface Topology and Chemistry in Adsorption of Proteins and Cell Proliferation
Zalieckas, Justas; Rios Mondragon, Ivan; Pobedinskas, Paulius; Kristoffersen, Arne Skodvin; Mohamed-Ahmed, Samih; Gjerde, Cecilie; Høl, Paul Johan; Hallan, Geir; Furnes, Ove Nord; Cimpan, Mihaela-Roxana; Haenen, Ken; Holst, Bodil; Greve, Martin Møller (Journal article; Peer reviewed, 2022)Polycrystalline diamond has the potential to improve the osseointegration of orthopedic implants compared to conventional materials such as titanium. However, despite the excellent biocompatibility and superior mechanical ... -
Testing Fluorescence Lifetime Standards using Two-Photon Excitation and Time-Domain Instrumentation: Fluorescein, Quinine Sulfate and Green Fluorescent Protein
Kristoffersen, Arne Skodvin; Hamre, Børge; Erga, Svein Rune; Frette, Øyvind (Peer reviewed; Journal article, 2018-09)It is essential for everyone working with experimental science to be certain that their instruments produce reliable results, and for fluorescence lifetime experiments, information about fluorescence lifetime standards is ... -
Testing Fluorescence Lifetime Standards using Two-Photon Excitation and Time-Domain Instrumentation: Rhodamine B, Coumarin 6 and Lucifer Yellow
Kristoffersen, Arne Skodvin; Hamre, Børge; Erga, Svein Rune; Frette, Øyvind (Peer reviewed; Journal article, 2014-05-28)Having good information about fluorescence lifetime standards is essential for anyone performing lifetime experiments. Using lifetime standards in fluorescence spectroscopy is often regarded as a straightforward process, ... -
Testing the Limits of Atmospheric Correction over Turbid Norwegian Fjords
Tessin, Elinor; Hamre, Børge; Kristoffersen, Arne Skodvin (Journal article; Peer reviewed, 2024)Atmospheric correction, the removal of the atmospheric signal from a satellite image, still poses a challenge over optically complex coastal water. Here, we present the first atmospheric correction validation study performed ... -
Versatile compressive microscope for hyperspectral transmission and fluorescence lifetime imaging
Klein, Lukáš; Kristoffersen, Arne Skodvin; Touš, Jan; Žídek, Karel (Journal article; Peer reviewed, 2022)Increasing demand for multimodal characterization and imaging of new materials entails the combination of various methods in a single microscopic setup. Hyperspectral imaging of transmission spectra or photoluminescence ...