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Three-dimensional magnetotelluric modelling in a mixed space-wavenumber domain
(Peer reviewed; Journal article, 2022)We have developed a new 3D magnetotelluric modeling scheme in a mixed space-wavenumber domain. The modeling scheme is based on using a 2D Fourier transform along two horizontal directions to solve a vector-scalar potential ... -
Three-dimensional parabolic equation model for seismo-acoustic propagation: Theoretical development and preliminary numerical implementation
(Journal article; Peer reviewed, 2017)A three-dimensional (3D) parabolic equation (PE) model for sound propagation in a seismo-acoustic waveguide is developed in Cartesian coordinates, with x, y, and z representing the marching direction, the longitudinal ... -
Throughput and delay analysis of HARQ with code combining over double Rayleigh fading channels
(Journal article; Peer reviewed, 2018)This paper proposes the use of hybrid automatic repeat request (HARQ) with code combining (HARQ-CC) to offer reliable communications over double Rayleigh channels. The double Rayleigh fading channel is of particular interest ... -
THz time domain spectroscopy of materials in reflection and transmission
(Master thesis, 2017)This thesis presents and describes various improvements to a Terahertz time domain spectroscopy setup using plasma filament for generation and free space electro optic sampling for detection. By performing measurements ... -
Tilstandsanalyse av separator
(Master thesis, 2006)Separatorer er sentrale elementer i olje- og gassproduksjon. De er også gjenstand for betydelige driftsproblemer, og dagens metoder for tilstandsovervåkning fungerer ikke tilfredsstillende. Akustisk tilstandsovervåkning ... -
Time Diversity Passive Time Reversal for Underwater Acoustic Communications
(Journal article; Peer reviewed, 2019)Underwater acoustic signal propagation is greatly affected by source-receiver motion, surface variations, and water column variabilities, which make the underwater acoustic communications very challenging. A passive time ... -
Time lapse seismic analysis of the Tohoku-Oki 2011 earthquake
(Journal article, 2019)A detailed time lapse seismic analysis of subsurface movements is presented using seismic 2D lines acquired prior to and after the Tohoku-Oki earthquake offshore Japan in 2011. Estimated movements of the seabed from the ... -
Time-Aware Distributed Sequential Detection of Gas Dispersion via Wireless Sensor Networks
(Peer reviewed; Journal article, 2023)This work addresses the problem of detecting gas dispersions through concentration sensors with wireless transmission capabilities organized as a distributed Wireless Sensor Network (WSN). The concentration sensors in the ... -
Time-domain spectroscopy of KTiOPO4 in the frequency range 0.6 - 7.0 THz
(Journal article; Peer reviewed, 2019)We report on THz time-domain spectroscopy measurements of flux grownKTiOPO4in the frequency range 0.6–7.0 THz (20 to 240 cm−1). Our results compare well with earlierRaman and far-infrared measurements. We theorize that the ... -
Time-Frequency Fused Underwater Acoustic Source Localization Based on Contrastive Predictive Coding
(Peer reviewed; Journal article, 2022)We propose a time-frequency fused underwater acoustic source localization method based on self-supervised learning with contrastive predictive coding. Firstly, two feature extractors are trained to solve the pretext task ... -
Time-Lapse 3D CSEM for Reservoir Monitoring Based on Rock Physics Simulation of the Wisting Oil Field Offshore Norway
(Peer reviewed; Journal article, 2023)The marine controlled-source electromagnetic (CSEM) method has been used in different applications, such as oil and gas reservoir exploration, groundwater investigation, seawater intrusion studies and deep-sea mineral ... -
Tone mapping in video conference systems
(Master thesis, 2011)Normal sensors are able to only capture a limited dynamic range. In scenes with large dynamic range, such as situations with both dark indoor and bright outdoor parts, the image will get either over- or under exposed if ... -
Topological Defects and Dipolar Magnetism in Magnetic Nanostructures
(Doctoral theses at NTNU;2020:69, Doctoral thesis, 2020)In this work, magnetism in micro- and nanoscale magnetic structures has been explored. We focus on two different topics, topological defects and dipolar magnetism. As a model system for the study of interacting topological ... -
Total internal reflection and evanescent gain
(Journal article; Peer reviewed, 2011)Total internal reflection occurs for large angles of incidence, when light is incident from a high-refractive-index medium onto a low-index medium. We consider the situation where the low-index medium is active. By invoking ... -
Total Variation-Based Distributed Kalman Filtering for Resiliency Against Byzantines
(Peer reviewed; Journal article, 2023)This article proposes a distributed Kalman filter (DKF) with enhanced robustness against Byzantine adversaries. A Byzantine agent is a legitimate network agent that, unlike an honest agent, manipulates information before ... -
Touch Localization by Estimating the Direction of Arrivals of Plate Edge Reflections
(Master thesis, 2023)Dette prosjektet utforsker muligheten for berøringslokalisering ved bruk av metoder for estimering av ankomstvinkler (direction-of-arrival (DOA)) på Lamb-bølger som reflekteres fra kantene på en plate. Det foreslås en ... -
Toward an integrated project complexity narrative – A case study of academic organizations
(Peer reviewed; Journal article, 2022)The last decade has seen a growing interest in the benefits of applying project management (PM) and system engineering (SE) in an integrated way toward complex projects and programs. The concept of project complexity ... -
Toward Growth Control of (111)-oriented Perovskite Thin Films: La0.7Sr0.3MnO3/SrTiO3(111) a model study
(Master thesis, 2012)Control of growth and surface morphology of perovskite oxide thin films is essential for future electronic devices based on such materials. Uncommon crystallographic orientations, like (111), are particularly interesting ... -
Toward quality-assured software implementations of {NMPB} 2008 ({AFNOR NF S} 31-133:2011) for the calculation of outdoor noise propagation
(Journal article, 2018)In the framework of ISO/TC 43/SC 1/WG 56 Working Group, the ISO 17534 series of standards and technical reports is being developed to deal with the quality assured implementation of calcula- tion methods for the outdoor ... -
Toward real-time polyp detection using fully CNNs for 2D Gaussian shapes prediction
(Peer reviewed; Journal article, 2020)To decrease colon polyp miss-rate during colonoscopy, a real-time detection system with high accuracy is needed. Recently, there have been many efforts to develop models for real-time polyp detection, but work is still ...