Browsing Institutt for fysikk by Document Types "Journal article"

Now showing items 1-20 of 1294

    • 1 Watt femtosecond mid-IR Cr:ZnS laser 

      Sorokin, Evgeni; Tolstik, Nikolai; Sorokina, Irina T (Journal article; Peer reviewed, 2013)
      A room-temperature Kerr-Lens modelocked (KLM) Cr:ZnS laser generates <70 fs pulses duration (about eight optical cycles) with 5.6 nJ pulse energy and over 100 nm FWHM spectral width at 105-157 MHz repetition rates. The ...

    • The 11 year solar cycle UV irradiance effect and its dependency on the Pacific Decadal Oscillation 

      Guttu, Sigmund; Orsolini, Yvan J.; Stordal, Frode; Otterå, Odd Helge; Omrani, Nour-Eddine (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 ...

    • 2.5D and 3D segmentation of brain metastases with deep learning on multinational MRI data 

      Ottesen, Jon André; Yi, Darvin; Tong, Elizabeth; Iv, Michael; Latysheva, Anna; Saxhaug, Cathrine; Jacobsen, Kari Dolven; Helland, Åslaug; Emblem, Kyrre E; Rubin, Daniel L.; Bjørnerud, Atle; Zaharchuk, Greg; Grøvik, Endre (Peer reviewed; Journal article, 2023)
      Introduction: Management of patients with brain metastases is often based on manual lesion detection and segmentation by an expert reader. This is a time- and labor-intensive process, and to that end, this work proposes ...

    • 2N+4-rule and an atlas of bulk optical resonances of zigzag graphene nanoribbons 

      Payod, R. B.; Grassano, D.; Santos, G. N. C.; Levshov, D. I.; Pulci, O.; Saroka, Vasil (Journal article; Peer reviewed, 2020)
      Development of on-chip integrated carbon-based optoelectronic nanocircuits requires fast and non-invasive structural characterization of their building blocks. Recent advances in synthesis of single wall carbon nanotubes ...

    • 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 

      Sundset, Marit; Wanderås, Anne Dybdahl; Danielsen, Signe; Alsaker, Mirjam Delange; Hagen, Bjørn; Marthinsen, Anne Beate Langeland (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 ...

    • 3D Maps of Mineral Composition and Hydroxyapatite Orientation in Fossil Bone Samples Obtained by X-ray Diffraction Computed Tomography 

      Mürer, Fredrik Kristoffer; Sanchez, Sophie; Alvarez-Murga, Michelle; Di Michiel, Marco; Pfeiffer, Franz; Bech, Martin; Breiby, Dag Werner (Journal article; Peer reviewed, 2018)
      Whether hydroxyapatite (HA) orientation in fossilised bone samples can be non-destructively retrieved and used to determine the arrangement of the bone matrix and the location of muscle attachments (entheses), is a question ...

    • 3D modelling of β'' in Al-Mg-Si: towards an atomistic level ab initio based examination of a full precipitate enclosed in a host lattice 

      Ehlers, Flemming J H; Dumoulin, Stephane; Holmestad, Randi (Journal article, 2014)
      We extend a first principles based hierarchical multi-scale model scheme for describing a fully coherent precipitate in a host lattice to 3D simulations. As our test system, the needle-shaped main hardening Al–Mg–Si alloy ...

    • 3HSP J095507.9+355101: A flaring extreme blazar coincident in space and time with IceCube-200107A 

      Giommi, P.; Padovani, P.; Oikonomou, Foteini; Glauch, T.; Paiano, S.; Resconi, E. (Peer reviewed; Journal article, 2020)
      The uncertainty region of the highly energetic neutrino IceCube200107A includes 3HSP J095507.9+355101 (z = 0.557), an extreme blazar, which was detected in a high, very hard, and variable X-ray state shortly after the ...

    • The 3rd ESTRO-EFOMP core curriculum for medical physics experts in radiotherapy 

      Garibaldi, Cristina; Essers, Marion; Heijmen, Ben; Bertholet, Jenny; Koutsouveli, Efi; Schwarz, Marco; Bert, Christoph; Bodale, Marin; Casares-Magaz, Oscar; Gerskevitch, Eduard; Koniarova, Irena; Korreman, Stine; Lisbona, Albert; Lopez Medina, Antonio; Maas, Ad; Moeckli, Raphaël; Moore, Margaret; Petrovic, Borislava; Piotrowski, Tomasz; Poli, Esmeralda; Prezado, Yolanda; Reynaert, Nick; Redalen, Kathrine; Stylianou Markidou, Erato; Verellen, Dirk; Jornet, Nuria; Clark, Catharine H. (Peer reviewed; Journal article, 2022)
      Purpose To update the 2011 ESTRO-EFOMP core curriculum (CC) for education and training of medical physics experts (MPE)s working in radiotherapy (RT), in line with recent EU guidelines, and to provide a framework for ...

    • 6.8 W all-fiber supercontinuum source at 1.9-2.5 um 

      Dvoyrin, Vladislav; Sorokina, Irina T (Journal article; Peer reviewed, 2014)
      We report a simple method of generating a spectrally flat and high average power spectral density (up to 14 mW/nm) optical supercontinuum in the 1.95–2.5 μm range covering a transparency window of the atmosphere. The ...

    • A consistent reduction of the two-layer shallow-water equations to an accurate one-layer spreading model 

      Fyhn, Eirik Holm; Lervåg, Karl Yngve; Ervik, Åsmund; Wilhelmsen, Øivind (Journal article; Peer reviewed, 2019)
      The gravity-driven spreading of one fluid in contact with another fluid is of key importance to a range of topics. These phenomena are commonly described by the two-layer shallow-water equations (SWE). When one layer is ...

    • A correlative spatiotemporal microscale study of calcium phosphate formation and transformation within an alginate hydrogel matrix. 

      Bassett, David; Ucar, Seniz; Sikorski, Pawel; Andreassen, Jens-Petter; Bjørnøy, Sindre Hove; Strand, Berit Løkensgard (Journal article; Peer reviewed, 2016)
      The modification of soft hydrogels with hard inorganic components is a method used to form composite materials with application in non-load-bearing bone tissue engineering. The inclusion of an inorganic component may provide ...

    • A high precision method for quantitative measurements of reactive oxygen species in frozen biopsies 

      Berg, Kirsti; Ericsson, Madelene; Lindgren, Mikael; Gustafsson, Håkan (Journal article; Peer reviewed, 2014)
      Objective: An electron paramagnetic resonance (EPR) technique using the spin probe cyclic hydroxylamine 1-hydroxy-3-methoxycarbonyl-2,2,5,5-tetramethylpyrrolidine (CMH) was introduced as a versatile method for high ...

    • A hot spot in the neutrino flux from the Cygnus loop SNR 

      Bouyahiaoui, Makarim; Kachelriess, Michael; Semikoz, Dimitry (Peer reviewed; Journal article, 2021)

    • A hybrid aluminium alloy and its zoo of interacting nano-precipitates 

      Wenner, Sigurd; Marioara, Calin Daniel; Andersen, Sigmund Jarle; Ervik, Martin; Holmestad, Randi (Journal article, 2015)
      An alloy with aluminium as its base element is heat treated to form a multitude of precipitate phases known from different classes of industrial alloys: Al–Cu(–Mg), Al–Mg–Si–Cu, and Al–Zn–Mg. Nanometer-sized needle-shaped ...

    • A minimal model for extragalactic high-energy particles 

      Kachelriess, Michael; Kalashev, O.; Ostapchenko, S; Semikoz, DV (Journal article; Peer reviewed, 2017)
      We explain in a unified way the experimental data on ultrahigh energy cosmic rays (UHECR) and neutrinos, using a single source class and obeying limits on the extragalactic diffuse gamma-ray background (EGRB). If UHECRs ...

    • A Monte Carlo Algorithm for Immiscible Two-Phase Flow in Porous Media 

      Savani, Isha; Sinha, Santanu; Hansen, Alex; Bedeaux, Dick; Kjelstrup, Signe; Vassvik, Morten (Journal article; Peer reviewed, 2017)
      We present a Markov Chain Monte Carlo algorithm based on the Metropolis algorithm for simulation of the flow of two immiscible fluids in a porous medium under macroscopic steady-state conditions using a dynamical pore ...

    • A nano-silicate material with exceptional capacity for CO2 capture and storage at room temperature 

      Cavalcanti, Leide Passos; Kalantzopoulos, Georgios N.; Eckert, J.; Knudsen, Kenneth Dahl; Fossum, Jon Otto (Journal article; Peer reviewed, 2018)
      In order to mitigate climate change driven by the observed high levels of carbon dioxide (CO2) in the atmosphere, many micro and nano-porous materials are being investigated for CO2 selectivity, capture and storage (CCS) ...

    • A Renormalization Group Procedure for Fiber Bundle Models 

      Pradhan, Srutarshi; Hansen, Alex; Ray, Purusattam (Journal article; Peer reviewed, 2018)
      We introduce two versions of a renormalization group scheme for the equal load sharing fiber bundle model. The renormalization group is based on formulating the fiber bundle model in the language of damage mechanics. A ...

    • A review of materials engineering in silicon-based optical fibre 

      Healy, Noel; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2017)
      Semiconductor optical fibre technologies have grown rapidly in the last decade and there are now a range of production and post-processing techniques that allow for a vast degree of control over the core material's ...