Browsing NTNU Open by Title
Now showing items 100259-100278 of 101989
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Wave-induced current for long-crested and short-crested random waves
(Journal article; Peer reviewed, 2014)This paper provides a simple analytical tool which can be used to calculate the wave-induced current beneath long-crested (2D) and short-crested (3D) random waves. The approach is based on assuming the waves to be a ... -
Wave-induced nonlinear effects on a pontoon-type Very Large Floating Structures (VLFS)
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:61, Doctoral thesis, 2011)The wave-induced nonlinear effects on the pontoon-type Very Large Floating Structure (VLFS) is investigated in this thesis. Typical dimensions of the pontoon-type VLFS such as a floating airport are 5000m in length, 2000m ... -
Wave-to-Wire Model of the Wave Energy Converter Bolt2: Control and Power Extraction with an All-Electric Power Take-Off System
(Master thesis, 2012)Fred Olsen is currently testing their latest wave energy converter outside of Falmouth Bay in England, preparing it for commercial exploitation at the Wavehub-project. Previous studies have shown that this device has ... -
Wavefield reconstruction for velocity–stress elastodynamic full-waveform inversion
(Peer reviewed; Journal article, 2020)Gradient computations in full-waveform inversion (FWI) require calculating zero-lag cross-correlations of two wavefields propagating in opposite temporal directions. Lossless media permit accurate and efficient reconstruction ... -
Waveform Analysis of Nonlinear Electric Loads Through Investigation of High and Low Sampling Frequency Data - Exploring the Possibility of Signature Analysis by Comparing Data Provided by an Advanced Measuring System and High Frequency Data Provided by an Oscilloscope
(Master thesis, 2018)This thesis investigates the data provided by the Home Area Network, HAN, port installed in all new Advanced Metering System, AMS, power meters. The data is provided over an M-bus protocol, with a low bandwidth of maximum ... -
Waveform Design for Software Defined Multifunctional RF Systems
(Master thesis, 2017)In this thesis, a study of multifunctional radio frequency (RF) systems implementing radar, communication, and electronic warfare (EW) is presented. Development of low cost and highly adaptable software defined radios ... -
Wavefront aberration correction in medical ultrasound imaging
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:165, Doctoral thesis, 2004)Medisinsk ultralydavbildning er et relativt rimelig verktøy som er i utstrakte bruk på dagens sykehus og tildels også legekontor. En underliggende antakelse ved dagens avbildningsteknikker er at vevet som skal avbildes i ... -
Waveguide asymmetric long-period grating couplers as refractive index sensors
(Peer reviewed; Journal article, 2020)A highly sensitive integrated photonic transducer is designed by utilizing asymmetric long-period gratings on a silicon waveguide. These gratings are formed by periodic perturbation of the waveguide width, leading to ... -
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 ... -
Wavelet based feature extraction and visualization in hyperspectral tissue characterization
(Journal article; Peer reviewed, 2014)Hyperspectral images of tissue contain extensive and complex information relevant for clinical applications. In this work, wavelet decomposition is explored for feature extraction from such data. Wavelet methods are simple ... -
Wavelet based Video coding with optical flow for motion compensation
(Master thesis, 2011)In broadcasting environments intra-only video coding with JPEG 2000 has shownto provide many desired features along with high picture quality. However, thereis no exploitation of temporal redundancy, which can reduce the ... -
Wavelet Techniques in Medical Imaging: Classification of UltraSound Images using the Windowed Scattering Transform
(Master thesis, 2014)In this thesis we will study wavelet techniques for image classification in ultrasound(US) images. The aim is to develop a method for classifying the degree of inflammation in finger-joints.We develop and apply the techniques ... -
Wavelets and irregular time series
(Master thesis, 2012)In this thesis we study time series containing pressure measurements from a three phase flow pipeline at the Ekofisk oil field. The pipeline transports a mixture of oil, water and gas from $15$ wells for approximately ... -
WaveRider - A high-intensity interval training exergame for exercise bikes
(Master thesis, 2022)Statistikk levert av New England Journal of Medicine viser at den norske befolkningen har et høyere nivå av overvekt enn flere europeiske land og de høyeste verdiene i Skandinavia. Studier viser at vi bruker mer tid bak ... -
WaveRider – A high-intensity interval training exergame for exercise bikes
(Master thesis, 2022)Statistikk levert av New England Journal of Medicine viser at den norske befolkningen har et høyere nivå av overvekt enn flere europeiske land og de høyeste verdiene i Skandinavia. Studier viser at vi bruker mer tid bak ... -
Waves and associated currents-experiences from 5 years metocean measurements in the northern North Sea
(Journal article; Peer reviewed, 2019) -
Waves in Excitable Media
(Master thesis, 2012)This thesis is dedicated to the study of Barkley's equation, a stiff diffusion-reaction equation describing waves in excitable media. Several numerical solution methods will be derived and studied, range from the simple ... -
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 ... -
Waves' numerical dispersion and damping due to discrete dispersion relation
(Chapter; Peer reviewed, 2014)In linear Rankine panel method, the discrete linear dispersion relation is solved on a discrete free-surface to capture the free-surface waves generated due to wave-body interactions. Discretization introduces numerical ...