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(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Positron annihilation spectroscopy, Fourier transform-infrared absorption spectroscopy, and secondary ion mass spectrometry have been used to study the behavior of gallium vacancy-related defects and hydrogen in deuterium ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Electroencephalography (EEG) and magnetoencephalography (MEG) are among the most important techniques for non-invasively studying cognition and disease in the human brain. These signals are known to originate from cortical ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The new Oslo Scintillator Array (OSCAR) has been commissioned at the Oslo Cyclotron Laboratory (OCL). It consists of 30 large volume (⌀ 3.5 × 8 inches) LaBr3(Ce) detectors that are used for 𝛾-ray spectroscopy. The response ...
(Doctoral thesis / Doktoravhandling, 2021)
Beam-driven plasma wakefield acceleration (PWFA) is considered one of the most promising novel acceleration technologies capable of drastically shrinking the footprints of high-energy particle colliders. However, there are ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Auroral whistler‐mode radio emissions called saucers are of fundamental interest because they require an unusually stationary emission process in the dynamic auroral environment, and it is a mystery how that can happen in ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
This article describes a curricular innovation designed to help students experience authentic physics inquiry with an emphasis on computational modeling and scientific communication. The educational design centers on a new ...
(Doctoral thesis / Doktoravhandling, 2021)
Despite the quantum mechanical nature of the atomic nucleus, many important properties of nuclei and nuclear reactions can be well described by average statistical properties. Our knowledge of these properties does not ...
(Doctoral thesis / Doktoravhandling, 2021)
In his annus mirabilis, Albert Einstein published several important works that would strongly affect the future of physics. Among these was a work on Brownian motion – the random motion of small particles suspended in a ...
(Master thesis / Masteroppgave, 2021)
Koronavirusutbruddet medførte våren 2020 en unntakstilstand i norsk skole som ingen tidligere hadde sett maken til. I perioden fra 12. mars til 11. mai var skoler over hele landet stengt ned, og undervisning foregikk ...
(Master thesis / Masteroppgave, 2021)
Alzheimer's disease is the most common cause of dementia, and the disease can be characterized by aggregation of the protein Amyloid-beta Amyloid-beta is poisonous for the nerve cells and forms pathologic lesions that can ...
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2021)
We report a novel doping strategy for YBa2Cu3O7-x (YBCO) superconducting films by using a positive mismatch, Ba2YNbO6 (BYNO), and a negative mismatch, LaAlO3 (LAO), simultaneously. Double doping can significantly reduce ...
(Master thesis / Masteroppgave, 2021)
Activity tracking devices are widely used for monitoring and measuring different aspects of physical activity, such as heart rate, speed, energy expenditure and power output. Breathing variables like ventilation and oxygen ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The characteristics of turbulent plasma in the winter cusp ionosphere is studied based on in-situ data from the Investigation of Cusp Irregularities (ICI) sounding rockets. The electron density fluctuations from ICI-2 and ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract Very high energy electron (VHEE) beams have been proposed as an alternative radiotherapy modality to megavoltage photons; they penetrate deeply without significant scattering in inhomogeneous tissue because of ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Purpose: This study attempted to develop a method to measure the applied recursive filtration and to determine the noise reduction of four different fluoroscopic systems. The study also attempted to elucidate the importance ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Grid cells are part of a widespread network which supports navigation and spatial memory. Stable grid patterns appear late in development, in concert with extracellular matrix aggregates termed perineuronal nets (PNNs) ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
By means of a particle model that includes interactions only via the local particle concentration, we show that hyperballistic diffusion may result. This is done by finding the exact solution of the corresponding non-linear ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
This work systematically explores 19 unique configurations of the close-associate Ga–O divacancies (VGaVO) in β−Ga2O3, including their complexes with H impurities, using hybrid functional calculations. Interestingly, most ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The constant phase element (CPE) is a capacitive element with a frequency-independent negative phase between current and voltage which interpolates between a capacitor and a resistor. It is used extensively to model the ...
(Doctoral thesis / Doktoravhandling, 2021)
Metal oxide semiconductors are widely recognized as prime materials for future energy technology along the low-carbon development path. Zinc oxide and gallium oxide, studied in the present thesis, promise highly efficient ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Droplets covered with densely packed solid particles, often called Pickering droplets, are used in a variety of fundamental studies and practical applications. For many applications, it is essential to understand the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Based on the Swarm 16 Hz Advanced Plasma Density data set, and using the Swarm A satellite, we apply automatic detection of spectral breaks in seven million sampled plasma density power spectra in the high-latitude F-region ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Mechanical algesia is an important process for the preservation of living organisms, allowing potentially life-saving reflexes or decisions when given body parts are stressed. Yet, its various underlying mechanisms remain ...
Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Understanding the evolution of level densities in the crossover from spherical to well-deformed nuclei has been a long-standing problem in nuclear physics. We measure nuclear level densities for a chain of neodymium isotopes ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
In any domain involving some stressed solids, that is, from seismology to general engineering, the strength of matter is a paramount feature to understand. We here discuss the ability of a simple thermally activated ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
Pt-Sn bimetallic catalysts, especially Pt-Sn alloys, are considered highly CO-tolerant and are thus candidates for reformate derived hydrogen oxidation and for direct oxidation of fuel cell molecules. However, it remains ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract Thermoelectric modules can be used in waste heat harvesting, sensing, and cooling applications. Here, we report on the fabrication and performance of a four-leg module based on abundant silicide materials. While ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The nuclear level densities (NLDs) and the γ-ray strength functions (γSFs) of 153,155Sm have been extracted from (d,pγ) coincidences using the Oslo method. The experimental NLD of 153Sm is higher than the NLD of 155Sm, in ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The Oslo method comprises a set of analysis techniques designed to extract nuclear level density and average -decay strength function from a set of excitation-energy tagged -ray spectra. Here we present a new software ...
An AD5940-based instrument for bioimpedance spectroscopy and electrochemical sensing Restricted Access
(Master thesis / Masteroppgave, 2021)
As a low-cost, non-destructive analysis technique, bioimpedance has lately seen a broad range of utilization in different areas. This has resulted in an increased necessity for portable and inexpensive instrumentation. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Sleep deprivation influences several critical functions, yet how it affects human brain white matter (WM) is not well understood. The aim of the present work was to investigate the effect of 32 hours of sleep deprivation ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The production of light neutral mesons in AA collisions probes the physics of the Quark-Gluon Plasma (QGP), which is formed in heavy-ion collisions at the LHC. More specifically, the centrality dependent neutral meson ...
(Master thesis / Masteroppgave, 2021)
Hjertestans er den vanligste årsaken til plutselig død blant idrettsutøvere. Dette skyldes ofte arvelige hjertesykdommer som blant annet kan oppdages på et elektrokardiogram (EKG). I denne studien ble to problemstillinger ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The effect of the native silicon oxide layer on the passivation properties of Al2O3 on p-type Si surfaces has been investigated. This was done by comparing effective carrier lifetime, surface saturation current density, ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
In this study structural and mechanical properties of a 1 μm thick Al2O3 coating, deposited on 316L stainless steel by Pulsed Laser Deposition (PLD), subjected to high energy ion irradiation were assessed. Mechanical ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
For well over a century, the journal Science Education has been publishing articles about the teaching and learning of science. These articles represent more than just a repository of past work: they have the potential to ...
(Doctoral thesis / Doktoravhandling, 2021)
Computing (such as programming) has revolutionised the way mathematicians and scientists work, and has also changed the way we teach mathematics and science. However, relatively little is known about how the changes to ...
(Master thesis / Masteroppgave, 2021)
Prostate cancer (PCa) is one of the most common cancers in the world, and the most common cancer in Norway. A challenge in the management of PCa is that it is a very heterogeneous disease with large variations in tumor ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract When recording neural activity from extracellular electrodes, both in vivo and in vitro , spike sorting is a required and very important processing step that allows for identification of single neurons’ activity. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Measurements of total ozone column and effective cloud transmittance have been performed since 1995 at the three Norwegian sites Oslo/Kjeller, Andøya/Tromsø, and in Ny-Ålesund (Svalbard). These sites are a subset of nine ...
(Master thesis / Masteroppgave, 2021)
In this project, we study the computationally challenging task of estimating the Kullback-Leibler divergence for high-dimensional probability distributions from particle physics. Our approach is based on using a trained ...
(Master thesis / Masteroppgave, 2021)
In the presented work the Oslo method analysis is utilized to find the nuclear level density (NLD) and γ-ray strength (γSF) function of 233U from the 233U(α, α') reaction. The γSF is compared to previous data and in turn, ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
Masteroppgaven ser på bruken av Bayesianske nevrale nettverk for supersymmetriske tverrsnittsprediksjoner med usikkerhetsestimat. Resultatene er lovende og usikkerhetsestimatene pålitelige.
An Exploration of Network Dynamics in a Comprehensive Network Model of Mouse Primary Visual Cortex Restricted Access
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Human motion analysis is a valuable tool for assessing disease progression in persons with conditions such as multiple sclerosis or Parkinson’s disease. Human motion tracking is also used extensively for sporting technique ...
(Master thesis / Masteroppgave, 2021)
Autonomous Survey Vessels, also known as Autonomous Survey Vehicles (ASV) are used for surveying of lakes in Norway. This Master thesis explains about development of a surveillance system for Autonomous Survey Vehicles. ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
Semiconductor materials provide a compelling platform for quantum technology, and a vast amount of materials and their properties can be found in high-throughput databases. However, filtering among these materials in order ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
When learning science, students must often make sense of complex and counterintuitive ideas. However, this process of sensemaking is difficult, and consequently students risk emerging from science courses with highly ...
(Master thesis / Masteroppgave, 2021)
We use molecular dynamics and machine learning for exploring structures in alpha quartz, a crystalline form of silica. This material is simulated at the molecular level, and structures are created by carving out atoms from ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
The Standard Model (SM) of particle physics does not incorporate gravity. In addition, it suffers from the hierarchy problem. An approach to these two predicaments is the idea of introducing extra spatial dimensions. The ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The surface morphology of faults controls the spatial anisotropy of their frictional properties and hence their mechanical stability. Such anisotropy is only rarely studied in seismology models of fault slip, although it ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
(Master thesis / Masteroppgave, 2021)
In this thesis a digital system for biomedical applications is proposed. A framework synthesizing analog waveforms and digital processing of measured analog signals is implemented. This is relevant for biomedical instrumentation ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
As a canary in a coalmine warns of dwindling breathable air, the honeybee can indicate the health of an ecosystem. Honeybees are the most important pollinators of fruit-bearing flowers, and share similar ecological niches ...
(Master thesis / Masteroppgave, 2021)
There are many complex factors that govern the development of fracture networks and the timing of macroscopic failure in rock. So far, we lack a unifying theory to predict fracture development in heterogeneous rock, and ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Centrality, which quantifies the “importance” of individual nodes, is among the most essential concepts in modern network theory. Most prominent centrality measures can be expressed as an aggregation of influence flows ...
(Master thesis / Masteroppgave, 2021)
The mystery of dark matter (DM) has intrigued scientists for many decades. The type of DM particles that has been studied the most is Weakly Interacting Massive Particles (WIMPs). These particles are assumed to have been ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2021)
A method to measure the electrical connectivity between square superconducting plates joined by weak link interfaces is presented. It is based on observation of lines where the flow of critical current abruptly changes ...
(Master thesis / Masteroppgave, 2021)
This work provides measurements of the γSF and NLD of both 188Re and 187Re, which will enable the first experimental constraints on the 186Re(n,γ) cross sections to better understand the s-process branching point of 186W. ...
(Master thesis / Masteroppgave, 2021)
As an attempt to complete black hole thermodynamics, Stephen Hawking showed in 1974 that black holes emit thermal radiation. This result has since been vastly disputed, both because it violates the classical notion that ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Multi-needle Langmuir probes are mounted on satellites and sounding rockets for high-frequency characterization of plasma in the ionosphere. Mounted on a spacecraft, the recorded probe current often differs from expected ...
(Master thesis / Masteroppgave, 2021)
Purpose: The range uncertainties in proton therapy is a problem in current treatment planning of cancer, and is largely due to limitations in estimating stopping power (S) from computed tomography (CT) images. With a dual ...
(Master thesis / Masteroppgave, 2021)
Space weather can cause disturbances in Global Navigation Satellite Systems (GNSS) signals at high latitudes predominantly in the form of phase scintillations. These scintillations are mainly caused by polar cap patches, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Voltage imaging and “all-optical electrophysiology” in human induced pluripotent stem cell (hiPSC)-derived neurons have opened unprecedented opportunities for high-throughput phenotyping of activity in neurons possessing ...
(Master thesis / Masteroppgave, 2021)
In this thesis, we explore a Bayesian approach to the problem of unfolding, namely Fully Bayesian Unfolding (FBU). With the overarching goal of providing an alternative method to the default unfolding method in use by the ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Chapter / Bokkapittel / SubmittedVersion, 2021)
Superconductors application can lead to significant economic benefits, especially in combination with use of liquid hydrogen, which is becoming an important part of the renewable energy economy. While many traditional ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Mechanical pain (or mechanical algesia) can both be a vital mechanism warning us for dangers or an undesired medical symptom important to mitigate. Thus, a comprehensive understanding of the different mechanisms responsible ...
(Chapter / Bokkapittel / SubmittedVersion, 2021)
Palladium (Pd) is a scarce metal, which is able to catalyze a variety of important chemical reactions. In the bulk form, Pd is anomalous paramagnetic, but in the form of nanoparticles, it has been reported as ferromagnetic. ...
(Chapter / Bokkapittel / SubmittedVersion, 2021)
Being biological object, microtubules attract significant attention in physics, since it is believed that they are responsible for quantum processing of information in the brain. There were, however, no direct experiments ...
(Master thesis / Masteroppgave, 2021)
States whose local expectation values are identical to those of vacuum outside of a given region of localization are known as strictly localized states. It is believed that states generated on-demand need to be strictly ...
(Master thesis / Masteroppgave, 2021)
In this thesis we compare two software codes used in cardiac electrophysiology research, cbcbeat [Marie Rognes et al., 2017] and openCARP [Plank et al., 2021b], in terms of efficiency. The comparison is done by reproducing ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract We present a subcritical fracture growth model, coupled with the elastic redistribution of the acting mechanical stress along rugous rupture fronts. We show the ability of this model to quantitatively reproduce ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The shear failure mechanism of polycrystalline gas hydrates is critical for understanding marine geohazards related to gas hydrates under a changing climate and for safe gas recovery from gas hydrate reservoirs. Since ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present an investigation of polar cap plasma structure lifetimes. We analyze both simulated data from ionospheric models (International Reference Ionosphere model and Mass Spectrometer Incoherent Scatter model) and in ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract. The lower-thermosphere–ionosphere (LTI) system consists of the upper atmosphere and the lower part of the ionosphere and as such comprises a complex system coupled to both the atmosphere below and space above. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract. The comparative research of the influence of different types of auroral particle precipitation and polar cap patches (PCPs) on the global positioning system (GPS) signals disturbances in the polar ionosphere was ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present a study of decameter scale ionospheric irregularities using in-situ electron density data from the NorSat-1 satellite. During the current period of low solar activity, NorSat-1 frequently observes significant ...