Institutt for fysikk
Recent Submissions
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Eastward-Propagating Planetary Waves Prior to the January 2009 Sudden Stratospheric Warming
(Peer reviewed; Journal article, 2021)Eastward-propagating planetary waves (EPWs) were investigated prior to the boreal January 2009 major sudden stratospheric warming (SSW) event simulated by the National Center for Atmospheric Research's Whole Atmosphere ... -
Exploring the diagnostic potential of adding T2 dependence in diffusion-weighted MR imaging of the prostate
(Peer reviewed; Journal article, 2021)Background: Magnetic resonance imaging (MRI) is essential in the detection and staging of prostate cancer. However, improved tools to distinguish between low-risk and high-risk cancer are needed in order to select the ... -
Transport of Nitric Oxide Via Lagrangian Coherent Structures Into the Top of the Polar Vortex
(Peer reviewed; Journal article, 2021)The energetic particle precipitation (EPP) indirect effect (IE) refers to the downward transport of reactive odd nitrogen (NOx = NO + NO2) produced by EPP (EPP-NOx) from the polar winter mesosphere and lower thermosphere ... -
Covariant Quantum Electrodynamics in Terms of a Possible Ether Flow
(Theoretical Physics Seminar in Trondheim;4, Preprint, 1971)This paper from 1971 has a somewhat strange history. At that time I was working with the covariant quantization procedure for an electromagnetic field in a dielectric medium. In such a theory, the commutator for the ... -
The 11 year solar cycle UV irradiance effect and its dependency on the Pacific Decadal Oscillation
(Peer reviewed; Journal article, 2021)The stratospheric, tropospheric and surface impacts from the 11 year ultraviolet solar spectral irradiance (SSI) variability have been extensively studied using climate models and observations. Here, we demonstrate using ... -
Criterion for Imminent Failure During Loading—Discrete Element Method Analysis
(Peer reviewed; Journal article, 2021)It has recently been reported that the equal load sharing fiber bundle model predicts the rate of change of the elastic energy stored in the bundle reaches its maximum before catastrophic failure occurs, making it a possible ... -
A Thermodynamic Framework for Stretching Processes in Fiber Materials
(Peer reviewed; Journal article, 2021)Fiber breakage process involves heat exchange with the medium and energy dissipation in the form of heat, sound, and light, among others. A purely mechanical treatment is therefore in general not enough to provide a complete ... -
Electron microscopy of intermetallic phases in aluminium-steel joints
(Doctoral theses at NTNU;2021:168, Doctoral thesis, 2021)Joints that combine the light weight of aluminium (Al) alloys with the high strength of steels, can be beneficial in structural components. For instance, in automobiles, Al-steel joints can enable improvement of the ... -
Linking mechanical properties to precipitate microstructure in three Al-Mg-Si(-Cu) alloys
(Peer reviewed; Journal article, 2021)The mechanical properties of age hardenable Al alloys depend strongly on the precipitate microstructure. This work has investigated the relationship between properties such as strength and ductility and the distribution ... -
Modeling the diffusion-weighted imaging signal for breast lesions in the b = 200 to 3000 s/mm 2 range: quality of fit and classification accuracy for different representations
(Peer reviewed; Journal article, 2020)Purpose To evaluate different non‐Gaussian representations for the diffusion‐weighted imaging (DWI) signal in the b‐value range 200 to 3000 s/mm2 in benign and malignant breast lesions. Methods Forty‐three patients ... -
Anomalous diffusion in systems with concentration-dependent diffusivity: exact solutions and particle simulations
(Journal article; Peer reviewed, 2020)We explore the anomalous diffusion that may arise as a result of a concentration dependent diffusivity. The diffusivity is taken to be a power law in the concentration, and from exact analytical solutions we show that the ... -
Ultrasound and microbubble treatment for improved delivery of nanomedicine to tumours and the brain
(Doctoral theses at NTNU;2021:138, Doctoral thesis, 2021)The combined use of ultrasound and intravascular microbubbles, referred to as ultrasound and microbubble treatment, has emerged as a promising technique to enhance delivery of nanomedicine to tumours and the brain. Even ... -
Interface Microstructure and Tensile Properties of a Third Generation Aluminium-Steel Butt Weld Produced Using the Hybrid Metal Extrusion & Bonding (HYB) Process
(Peer reviewed; Journal article, 2021)The Hybrid Metal Extrusion & Bonding (HYB) process is a patented solid state joining method for metals which utilizes filler material additions to consolidate the weld. In the present investigation the interface microstructure ... -
3D image guided adaptive brachytherapy in patients with locally advanced cervical cancer: experience and clinical results from a minimum of six years of follow-up
(Peer reviewed; Journal article, 2021)In 2005, individualized 3D image guided brachytherapy was implemented for cervical cancer patients, in accordance with the (GYN) GEC ESTRO recommendation, at St. Olav's Hospital, Trondheim, Norway. This study reports the ... -
Impact of the major SSWs of February 2018 and January 2019 on the middle atmospheric nitric oxide abundance
(Peer reviewed; Journal article, 2021)The Arctic middle atmosphere was affected by major sudden stratospheric warmings (SSW) in February 2018 and January 2019, respectively. In this article, we report for the first time the impact of these two events on the ... -
Sonopermeation Enhances Uptake and Therapeutic Effect of Free and Encapsulated Cabazitaxel
(Peer reviewed; Journal article, 2021)Delivery of drugs and nanomedicines to tumors is often heterogeneous and insufficient and, thus, of limited efficacy. Microbubbles in combination with ultrasound have been found to improve delivery to tumors, enhancing ... -
Effect of nitrogen pressure and substrate bias voltage on the properties of Al–Cr–B–N coatings deposited using cathodic arc evaporation
(Peer reviewed; Journal article, 2021)Cathodic arc evaporation deposition method was applied to forming Al–Cr–B–N coatings. The effect of nitrogen pressure (pN2) and substrate bias voltage (UB) on the properties of the coatings synthesized using Al50Cr30Br20 ... -
A Perturbation Analysis Approach for Studying the Effect of Swelling Kinetics on Instabilities in Hydrogel Plates
(Journal article; Peer reviewed, 2021)The onset of surface instability during diffusion-driven swelling of hydrogels depends on the kinetics of the swelling process. Here, we outline a perturbation analysis framework using a finite difference approach for ... -
Effect of acoustic radiation force on displacement of nanoparticles in collagen gels
(Peer reviewed; Journal article, 2020)Penetration of nanoscale therapeutic agents into the extracellular matrix (ECM) of a tumor is a limiting factor for the sufficient delivery of drugs in tumors. Ultrasound (US) in combination with microbubbles causing ... -
Aging and Failure of a Polymer Chain under Tension
(Peer reviewed; Journal article, 2021)The rupture of a polymer chain maintained at temperature T under fixed tension is prototypical to a wide array of systems failing under constant external stress and random perturbations. Past research focused on analytic ...
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