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Viser treff 1961-1980 av 2653
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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. ... -
The role of pressure and defects in the wurtzite to rock salt transition in cadmium selenide
(Peer reviewed; Journal article, 2022)Using molecular dynamics and path sampling techniques we investigated the effect of pressure and defects in the wurtzite to rock salt transition in cadmium selenide (CdSe). In the pressure range 2–10 GPa, rate constants ... -
Role of protein self-association on DNA condensation and nucleoid stability in a bacterial cell model
(Journal article; Peer reviewed, 2019)Bacterial cells do not have a nuclear membrane that encompasses and isolates the genetic material. In addition, they do not possess histone proteins, which are responsible for the first levels of genome condensation in ... -
Role of the quenched disorder in fracture front propagation
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:81, Doctoral thesis, 2013)The process of materials fracture is not yet understood across all levels. This thesis contains detailed description on a model of in-plane fracture along with results obtained using this model. The results from the model ... -
Rom for læring: Hva kan erfaringer fra autentisk naturvitenskapeligarbeid bidra med i klasserommet?
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:92, Doctoral thesis, 2014)Arbeidet presentert i denne avhandlingen har tatt for seg tiltak for lærere og fysikkelever som har foregått i regi av Nasjonalt senter for romrelatert opplæring (NAROM) ved Andøya Rakettskytefelt. Disse tiltakene har gitt ... -
Room Geometries with non-classical Reverberation Times
(Master thesis, 2015)In this Master s thesis, it has been examined whether it is possible to find rooms of such a geometry that the reverberation time becomes shorter than the predicted value of Sabine and Eyring. This was investigated using ... -
Rotation of the onion state in micromagnetic rings
(Master thesis, 2013)The behavior of the movement of the two domain walls that make up the onion state in 5 μm Permalloy rings have been studied under rotation using longitudinal magneto-optical Kerr effect. Resistance to the domain wall motion ... -
Rotational Curves of the Milky Way Galaxy and Andromeda Galaxy in Light of Vacuum Polarization around Eicheon †
(Peer reviewed; Journal article, 2023)Eicheon properties are discussed. It is shown that the eicheon surface allows setting a boundary condition for the vacuum polarization and obtaining a solution describing the dark matter tail in the Milky Way Galaxy. That ...