Blar i Fakultet for naturvitenskap (NV) på tittel
Viser treff 12321-12340 av 12453
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Water waves with compactly supported vorticity: A functional-analytic approach to bifurcation theory and the mathematical theory of traveling water waves
(Master thesis, 2014)We study the mathematical theory of water waves. Local bifurcation theory is also discussed, including the Crandall-Rabinowitz theorem; an abstract theorem used to establish the presence of bifurcation points in the zero ... -
Water-lean solvents for biogas upgrading
(Doctoral theses at NTNU;2020:298, Doctoral thesis, 2020)Biogas upgrading consists in the removal of CO2 from biogas, a process which produces a highly purified biomethane stream. As such, biogas upgrading has a double positive impact when considering climate change mitigation ... -
Waterborne chitosan-epoxysilane hybrid pretreatments for corrosion protection of zinc
(Journal article; Peer reviewed, 2016)Biopolymer-based systems are extensively studied as green alternatives for traditional polymer coatings, e.g., in corrosion protection. Chitosan–epoxysilane hybrid films are presented in this work as a chitosan-based ... -
Water–Gas Shift Activity of Pt Catalysts Prepared by Different Methods
(Peer reviewed; Journal article, 2020)Platinum supported on ceria and zirconia was prepared through different preparation methods: Coprecipitation (CP), spray drying (SD), and flame spray pyrolysis (FSP). The catalysts were characterized by XRD, TPR, N2 ... -
Watt-level Kerr-Lens Mode-Locked Cr:ZnS Laser at 2.4 μm
(Chapter, 2013)Power scaling of Kerr-lens mode-locked Cr:ZnS femtosecond oscillator allows reaching 1 W output power and pulse energies over 8 nJ. Soliton and chirped-pulse regimes result in 68 fs and 0.8-2 ps pulses, respectively. -
Wave scattering and transmission from penetrable self-affine surfaces
(Master thesis, 2009) -
Wave scattering theory applied to inversion and design
(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 and orientation dependent capture of light by diatom frustule nanostructures
(Peer reviewed; Journal article, 2015)The ecological success of diatoms is emphasized by regular blooms of many different species in all aquatic systems, but the reason behind their success is not fully understood. A special feature of the diatom cell is ... -
Wavelength conversion and supercontinuum generation in silicon optical fibers
(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
(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 ... -
Wax-Inhibitor Interactions Studied by Isothermal Titration Calorimetry and Effect of Wax Inhibitor on Wax Crystallization
(Journal article; Peer reviewed, 2017)Isothermal titration calorimetry is applied to investigate the interactions of polymeric pour-point depressants (PPDs) or asphaltenes with macrocrystalline wax in a model oil system. This represents a novel approach to ... -
“We learn it [mathematics] at school so one thinks that one will use it …”: Learners’ beliefs about relevance and importance of learning mathematics.
(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 ... -
Wear of carbon cathode lining in aluminium electrolysis cell: The effect of rotation speed in laboratory test cell
(Master thesis, 2014)The aluminium smelters are continually trying to increase their production either by designing high amperage cells or increasing the amperage on available cell designs. The service life for aluminium reduction cells is ... -
Wear of Carbon Refractory Materials in Silicon Furnaces
(Master thesis, 2016)The goal of this thesis was to investigate the internal morphology of different types of lining prepared with different installation techniques and different binders, and to see how the internal morphology affects the ... -
Weather affects temporal niche partitioning between moose and livestock
(Journal article; Peer reviewed, 2017)Co-existing species at the same trophic level often segregate with respect to diet, habitat use, or spatial distribution, reducing their direct competition for resources. However, temporal patterns in species-specific ... -
Weathering Plastics as a Planetary Boundary Threat: Exposure, Fate, and Hazards
(Peer reviewed; Journal article, 2021)We described in 2017 how weathering plastic litter in the marine environment fulfils two of three criteria to impose a planetary boundary threat related to “chemical pollution and the release of novel entities”: (1) ... -
Weddell-Scotia Confluence Effect on the Iron Distribution in Waters Surrounding the South Shetland (Antarctic Peninsula) and South Orkney (Scotia Sea) Islands During the Austral Summer in 2007 and 2008
(Journal article; Peer reviewed, 2019)An oceanographic survey around the South Shetland Islands (SSI) and the South Orkney Islands (SOI) was conducted during January 2007 and February 2008, respectively, as part of the United States Antarctic Marine Living ... -
Weed to Feed: From Seaweed to Sustainable Microbial Feedstock
(Master thesis, 2023)Nye og mer bærekraftige løsninger kreves i industriell sammenheng for å konservere ressurser som verdensbefolkningen allerede er svært avhengig av, som for eksempel dyrkbar jord. I løpet av dette prosjektet har tare blitt ... -
Weighting of Celestial and Terrestrial Cues in the Monarch Butterfly Central Complex
(Peer reviewed; Journal article, 2022)Monarch butterflies rely on external cues for orientation during their annual long-distance migration from Northern US and Canada to Central Mexico. These external cues can be celestial cues, such as the sun or polarized ...