Blar i Institutt for fysikk på tittel

Wave scattering theory applied to inversion and design

Nesse, Torstein (Doctoral theses at NTNU;2018:310, Doctoral thesis, 2018)

The scattering of waves from objects can be used as a tool for both characterization and manipulation. The way waves interact and scatter from objects can give us information about their structure and composition. Additionally, ...

Wavelength conversion and supercontinuum generation in silicon optical fibers

Peacock, Anna; Campling, Joseph; Runge, Antoine; Ren, Haonan; Shen, Li; Aktas, Ozan; Horak, Peter; Healy, Noel; Gibson, Ursula; Ballato, John (Journal article, 2018)

This paper describes the state of the art in wavelength conversion and supercontinuum generation using glass-clad silicon core optical fibers. Such semiconductor fibers have enjoyed considerable attention due to their ...

Waves Propagating on Fluids with Piecewise Constant Vorticity

Toften, Ståle (Master thesis, 2015)

The purpose of this study was to find the dispersion relation for waves on an arbitrary current velocity profile approximated by N linear layers. Using a Stokes expansion to first order in the steepness parameter ka the ...

“We learn it [mathematics] at school so one thinks that one will use it …”: Learners’ beliefs about relevance and importance of learning mathematics.

Sachdeva, Shipra; Eggen, Per-Odd (Journal article; Peer reviewed, 2023)

Denne artikkelen viser at når skoleledere og lærere samhandler i et regionalt utviklingsprosjekt som forutsetter bruk av eksterne kunnskapsressurser som kartleggingsdata og kompetansepakker, forholder de seg til ...

What causes the mid-winter cooling?

Fritsch, Frauke Ruth Lotte (Master thesis, 2016)

This thesis investigated the influence and conditions of vertical propagation of planetary waves on the mid-winter cooling in the southern hemispheric polar meso- sphere. MERRA zonal wind data was used to extract planetary ...

What do quantum computing students need to know about quantum physics?

Bungum, Berit; Selstø, Sølve (Journal article; Peer reviewed, 2022)

Wide field-of-view Fourier Ptychography microscopy based on Fresnel propagation scheme

Hasanzade, Mojde; Breiby, Dag Werner; Akram, Muhammad Nadeem (Peer reviewed; Journal article, 2022)

Fourier ptychographic microscopy (FPM) is a computational imaging method that gives a significantly increased space-bandwidth product, in practice high resolution combined with a wide field of view. In this article, we ...

Winds and tides in the mid-latitude southern hemisphere upper mesosphere recorded with the Falkland Islands SuperDARN radar

Hibbins, Robert; Freeman, Mervyn P.; Milan, Steve E.; Ruohoniemi, J. M. (Journal article; Peer reviewed, 2011)

Meteor wind data from the first year of operation of the Falkland Islands SuperDARN radar (52 S, 59 W) are used to characterize the atmospheric tides and background winds in the upper mesosphere above the South Atlantic. ...

X-ray absorption, X-ray diffraction and electron microscopy study of spent cobalt based catalyst in semi-commercial scale Fischer-Tropsch synthesis

Tsakoumis, Nikolaos; Dehghan-Niri, Roya; Rønning, Magnus; Walmsley, John; Borg, Øyvind; Rytter, Erling; Holmen, Anders (Peer reviewed; Journal article, 2014)

Calcined, reduced and spent Co-Re/γ-Al2O3 catalysts for Fischer–Tropsch synthesis (FTS) were characterized and compared. Co-K-edge and Re-LIII-edge X-ray absorption near edge structure (XANES), X-ray powder diffraction ...

X-ray Diffraction and Tomography Studies of Functional Organic Fibres

Esmaeili, Morteza (Doktoravhandlinger ved NTNU, 1503-8181; 2013:74, Doctoral thesis, 2013)

Structural characterisations of materials belong to the primary interests of basic and applied research, since they provide insights into the interactions of molecules and atoms, establish correlations with desired properties ...

X-ray nanoscopy of a bulk heterojunction

Patil, Nilesh; Skjønsfjell, Eirik Torbjørn Bakken; Van den Brande, Niko; Chavez Panduro, Elvia Anabela; Claessens, Raf; Guizar-Sicairos, Manuel; Van Mele, Bruno; Breiby, Dag Werner (Journal article; Peer reviewed, 2016)

Optimizing the morphology of bulk heterojunctions is known to significantly improve the photovoltaic performance of organic solar cells, but available quantitative imaging techniques are few and have severe limitations. ...

X-ray Scattering Study of Nanostructured GaSb Surfaces

Døli, Ellen (Master thesis, 2013)

In this thesis the surface structure of a sample consisting of slightly tilted, denselypacked Gallium-Antimonide (GaSb) nanocones, self-assembled through Ion Beam Sputtering(IBS) is investigated with a selection of X-ray ...

X-ray Studies of Capture, Storage and Release of CO2

Rustenberg, Karin Hveding (Master thesis, 2012)

We show experimentally that CO2 intercalates into the interlayer spaceof the synthetic smectite clay Li-fluorohectorite (LiFh). The intercalationoccurs for a range of conditions in terms of pressure (5 bar to 20 bar) ...

X-ray Studies of Carbon Dioxide Intercalation in Na-Fluorohectorite Clay at Near-Ambient Conditions

Hemmen, Henrik; Rolseth, Erlend G.; Fonseca, Davi de Miranda; Hansen, Elisabeth Lindbo; Fossum, Jon Otto; Plivelic, T (Journal article, 2012)

We show experimentally that gaseous CO2 intercalates into the interlayer space of the synthetic smectite clay Na-fluorohectorite at conditions not too far from ambient. The mean interlayer repetition distance of the clay ...

XPS and GDOES characterization of porous coating enriched with copper and calcium obtained on tantalum via plasma electrolytic oxidation

Rokosz, Krzysztof; Hryniewicz, Tadeusz; Chapon, Patrick; Raaen, Steinar; Sandim, Hugo Ricardo Zschommler (Peer reviewed; Journal article, 2016)

XPS and GDOES characterizations of porous coatings on tantalum after Plasma Electrolytic Oxidation (PEO) at 450 V for 3 minutes in electrolyte containing concentrated (85%) phosphoric acid with calcium nitrate and copper ...