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Viser treff 1967-1986 av 2669
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Revealing internal flow behaviour in arc welding and additive manufacturing of metals
(Journal article; Peer reviewed, 2018)Internal flow behaviour during melt-pool-based metal manufacturing remains unclear and hinders progression to process optimisation. In this contribution, we present direct time-resolved imaging of melt pool flow dynamics ... -
Revealing the Heterogeneous Nucleation and Growth Behaviour of Grains in Inoculated Aluminium Alloys During Solidification
(Peer reviewed; Journal article, 2019)An in situ X-ray radiographic study on the grain nucleation and grain growth of inoculated Al–10Cu and Al–20Cu alloys during isothermal melt solidification and directional solidification conditions with constant cooling ... -
Revealing the heterogeneous nucleation behavior of equiaxed grains of inoculated Al alloys during directional solidification
(Journal article, 2018)An in-situ study on the directional solidification of an inoculated Al-20 wt%Cu alloy under well-controlled constant cooling rates and temperature gradients has been carried out using a microfocus X-radiography set-up. The ... -
Reversal and termination of current-induced domain wall motion via magnonic spin-transfer torque
(Journal article; Peer reviewed, 2012)We investigate the domain wall dynamics of a ferromagnetic wire under the combined influence of a spin-polarized current and magnonic spin-transfer torque generated by an external field, taking also into account Rashba ... -
Reversal of the negative natural aging effect in Al-Mg-Si alloys
(Journal article, 2012)The effect of solute clustering on subsequent precipitation has been investigated for three different Al–Mg–Si alloys with similar Mg/Si ratios but different Mg + Si contents. Hardness measurements were carried out (i) ... -
Reversed Hysteresis during CO Oxidation over Pd75Ag25(100)
(Journal article; Peer reviewed, 2016)CO oxidation over Pd(100) and Pd75Ag25(100) has been investigated by a combination of near-ambient-pressure X-ray photoelectron spectroscopy, quadrupole mass spectrometry, density functional theory calculations, and ... -
Revisiting cosmic ray antinuclei fluxes with a new coalescence model
(Peer reviewed; Journal article, 2020)Antideuteron and antihelium nuclei have been proposed as promising detection channels for dark matter because of the low astrophysical backgrounds expected. To estimate both potential exotic contributions and their ... -
Rheology of high-capillary number two-phase flow in porous media
(Journal article; Peer reviewed, 2019)Flow of immiscible fluids in porous media at high capillary numbers may be characterized by an effective viscosity. We demonstrate that the effective viscosity is well-described by the Lichtenecker-Rother equation. Depending ... -
Rigid Body Attitude Control
(Master thesis, 2014)Geometric numerical integration schemes have been studied for rigid body attitudecontrol problems. We consider symplectic integrators and present a Lie group varia-tional integrator and a discrete gradient method. The two ... -
Ring Versus Ovoids and Intracavitary Versus Intracavitary-Interstitial Applicators in Cervical Cancer Brachytherapy: Results From the EMBRACE I Study
(Peer reviewed; Journal article, 2020)Purpose The aim of this study was to investigate the influence of brachytherapy technique and applicator type on target dose, isodose surface volumes, and organ-at-risk (OAR) dose. Methods and Materials Nine hundred ... -
RKKY interaction and coexistence with magnetism in superconducting systems
(Doctoral theses at NTNU;2022:53, Doctoral thesis, 2022)When cooled down, the electrical resistivity of certain materials suddenly drops to zero at some specific temperature. This phenomenon is called superconductivity. As we are living in a world steadily demanding more energy, ... -
RKKY interaction in a spin-split superconductor
(Peer reviewed; Journal article, 2021)We determine theoretically the interaction between two magnetic impurities embedded in a spin-split s-wave superconductor. The spin-splitting in the superconductor gives rise to two different interaction types between ... -
RKKY Interaction in Unconventional Superconductors
(Master thesis, 2023)Med den økende interessen for ikke-konvensjonelle superledere og jakten på kontrollerbare kvantebits, har Ruderman-Kittel-Kasuya-Yosida (RKKY) vekselvirkningen, en viktig utveklslings-vekselsvirkning mellom lokale spinnmomenter ... -
Robot Control in Image-Guided Intervention
(Master thesis, 2016)Introducing autonomous robot systems in clinical medicine is deemed extremely challenging due to the complex scene involved and variations between patients. The majority of commercialized systems are controlled directly ... -
Robotic optical observations of compact binary millisecond pulsars
(Master thesis, 2023)Denne masteroppgaven fokuserer på robotiske optiske observasjoner av den kompakte dobbeltstjerne-millisekundpulsaren PSR J1048+2339, utført ved hjelp av Joan Oró-teleskopet (TJO). Som en del av masterarbeidet ble en ... -
Robust Magnetic Surface Doping of Transition Metal Dichalcogenides
(Master thesis, 2016)The growth and potential intercalation of Fe on naturally grown MoS$_{2}$ has been studied using a number of surface techniques. An initial sample characterization revealed that samples extracted from the natural MoS$_{2}$ ... -
ROBUSTNESS ANALYSIS OF RADIATION TREATMENT PLANS FOR BREAST CANCER, A COMPARATIVE STUDY BETWEEN PROTONS AND PHOTONS
(Master thesis, 2019)Protonterapi gir teoretisk sett en forbedret dosefordeling og dermed et mulig gunstigere behandlingsresultat for brystkreftpatienter enn fotonterapi. Teknikken har et stort potensiale for å spare risikoorganer, som for ... -
Rochelle salt - A structural reinvestigation with improved tools. I. the high-temperature paraelectric phase at 308 - K
(Peer reviewed; Journal article, 2015)The crystal structure of the high-temperature paraelectric phase of Rochelle salt (K+·Na+·C4H4O62−·4H2O) at 308 K has been reinvestigated using synchrotron X-ray diffraction with refinement parameters R(int) = 0.0123, final ... -
The Role of Boron in Low Copper Spheroidal Graphite Irons
(Peer reviewed; Journal article, 2023)The effects of boron at concentrations ranging from 5 to 525 ppm in low copper spheroidal graphite iron (SGI) has been studied. At 130 to 140 ppm, no particular effect of boron was observed on the size distributions, number ... -
Role of Pore-Size Distribution on Effective Rheology of Two-Phase Flow in Porous Media
(Peer reviewed; Journal article, 2021)Immiscible two-phase flow of Newtonian fluids in porous media exhibits a power law relationship between flow rate and pressure drop when the pressure drop is such that the viscous forces compete with the capillary forces. ...