Browsing NTNU Open by Title
Now showing items 23228-23247 of 100934
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Direct finite element method for nonlinear analysis of semi-unbounded dam-water-foundation rock systems
(Journal article, 2017)A direct finite element method is presented for nonlinear earthquake analysis of interacting dam–water–foundation rock systems. The analysis procedure applies viscous damper absorbing boundaries to truncate the semi-unbounded ... -
Direct finite element method for nonlinear earthquake analysis of 3‐dimensional semi‐unbounded dam–water–foundation rock systems
(Journal article, 2018)A direct finite element method for nonlinear earthquake analysis of 2‐dimensional dam–water–foundation rock systems has recently been presented. The analysis procedure uses standard viscous‐damper absorbing boundaries to ... -
Direct finite element method for nonlinear earthquake analysis of concrete dams including dam–water–foundation rock interaction
(Doctoral theses at NTNU;2018:252, Doctoral thesis, 2018)Evaluating the seismic performance of concrete dams requires nonlinear dynamic analysis of two- or three-dimensional dam–water–foundation rock systems that include all the factors known to be significant in the earthquake ... -
A direct forcing immersed boundary method for simulating floating objects
(Chapter, 2022)For ship and offshore applications, the fluid-floating object interaction is of particular importance and accurate numerical calculations are required. However, low-order accurate methods are not sufficient to have decent ... -
Direct georeferencing for Hyperspectral Imaging of ocean surface
(Peer reviewed; Journal article, 2023)This paper presents a low-cost, low-weight setup for aerial imaging spectroscopy and an effective methodology for direct georeferencing onto the sea surface. The algorithm and the miniaturized payload described in this ... -
Direct Growth of AlGaN Nanorod LEDs on Graphene-Covered Si
(Journal article; Peer reviewed, 2018)High density of defects and stress owing to the lattice and thermal mismatch between nitride materials and heterogeneous substrates have always been important problems and limit the development of nitride materials. In ... -
Direct hydrogenation of carbon dioxide to methanol: Systematic generation of multi-stage designs
(Peer reviewed; Journal article, 2023)Commercial methanol catalysts based on Cu/ZnO/Al2O3 are less effective applied to direct hydrogenation of CO2 to methanol. The main reason is that the catalyst deactivation increases with the water pressure and temperature, ... -
Direct imaging of long-range ferromagnetic and antiferromagnetic order in a dipolar metamaterial
(Journal article, 2020)Magnetic metamaterials such as artificial spin ice offer a route to tailor magnetic properties. Such materials can be fabricated by lithographically defining arrays of nanoscale magnetic islands. The magnetostatic interactions ... -
Direct inhibition of c-Myc-Max heterodimers by celastrol and celastrol-inspired triterpenoids
(Journal article; Peer reviewed, 2015)Many oncogenic signals originate from abnormal protein-protein interactions that are potential targets for small molecule inhibitors. However, the therapeutic disruption of these interactions has proved elusive. We report ... -
Direct Integration of Strained-Pt Catalysts into Proton-Exchange-Membrane Fuel Cells with Atomic Layer Deposition
(Peer reviewed; Journal article, 2021)The design and fabrication of lattice-strained platinum catalysts achieved by removing a soluble core from a platinum shell synthesized via atomic layer deposition, is reported. The remarkable catalytic performance for the ... -
Direct Investments in Private Equity - a Nordic Perspective
(Master thesis, 2014)Based on an extensive survey among Nordic investors, we find that a majority of those investing in private equity are also pursuing direct investments. 17 in-depth interviews unveil that institutional investors are ... -
Direct Lithium Extraction from Lithium-Ion Batteries of Electrical Vehicles
(Master thesis, 2023)Litium-ion-batterier har dominert elbilmarkedet som et resultat av deres høye energitetthet og gode elektrokjemisk ytelser. Den økende etterspørselen etter litium-ion-batterier er i stor grad drevet av elektrifiseringen i ... -
Direct Method for Producing Scandium Metal and Scandium-Aluminium Intermetallic Compounds from the Oxides
(Journal article; Peer reviewed, 2018)The electrochemical de-oxidation process, also called FFC-Cambridge process, has been proposed previously to produce reactive metals and their alloys through reduction of their metal oxides. The process works by introducing ... -
Direct Methods for Detecting and Tracking Objects from Visual Images from Moving Cameras in a Marine Environment
(Master thesis, 2023)Denne avhandlingen undersøker bruken av optisk flyt for objektdeteksjon og posisjonsestimering innenfor konteksten av omgivelsene til den autonome fergen milliAmpere 1. Nåværende metoder for posisjonsestimering er ofte ... -
Direct Methods for Detecting and Tracking Objects from Visual Images from Moving Cameras in a Marine Environment
(Master thesis, 2023)Denne avhandlingen undersøker bruken av optisk flyt for objektdeteksjon og posisjonsestimering innenfor konteksten av omgivelsene til den autonome fergen milliAmpere 1. Nåværende metoder for posisjonsestimering er ofte ... -
Direct monitoring of minority carrier density during light induced degradation in Czochralski silicon by photoluminescence imaging
(Journal article; Peer reviewed, 2013)In this paper, we present a new method for studying the light induced degradation process, in which the minority carrier density is monitored directly during light soaking by photoluminescence imaging. We show experimentally ... -
Direct Non-Oxidative Conversion of Methane to C2 Hydrocarbons, Aromatics and Hydrogen
(Master thesis, 2017)Catalytic activity of Fe/HZSM-5 and Mo/HZSM-5 during methane dehydroaromatization was investigated. The catalysts were prepared by wet impregnation method, calcinated in air flow, tested in laboratory reactor and characterized ... -
Direct Nonoxidative Conversion of Methane to C2 Hydrocarbons, Aromatics and Hydrogen
(Master thesis, 2016)Natural gas contains a large quantity of methane that is valuable as a fuel source. However, it can also be converted to light olefins, but the present synthesis route includes the conversion into synthesis gas. This is ... -
Direct Numerical Simulation of hydrogen combustion at auto-ignitive conditions: Ignition, stability and turbulent reaction-front velocity
(Peer reviewed; Journal article, 2021)Direct Numerical Simulations (DNS) are performed to investigate the process of spontaneous ignition of hydrogen flames at laminar, turbulent, adiabatic and non-adiabatic conditions. Mixtures of hydrogen and vitiated air ... -
Direct Numerical Simulation of premixed ammonia/hydrogen flames: the effects of thermo-diffusive instabilities
(Doctoral theses at NTNU;2023:377, Doctoral thesis, 2023)In order to phase out traditional fuel from the energy mix to reduce CO2 emissions and meet the large energy demand, the combustion of carbon-free fuels needs to be considered. This thesis investigates the combustion of ...