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Disturbance rejection by acceleration feedforward: Application to dynamic positioning
(Journal article, 2011)This paper addresses environmental disturbance rejection in dynamic systems by means of acceleration feedforward. A feedforward structure calculates the environmental force and magnitude by comparing the filtered acceleration ... -
Disturbance Rejection by Feedback Control in Offshore Drilling: Experimental Results
(Journal article; Peer reviewed, 2014)As oil exploration and development costs rise, the oil industry increases its efforts to improve oil recovery (IOR) from existing fields. IOR is achieved mainly by drilling more wells, but drilling in partially depleted ... -
Disturbance Rejection in 2 x 2 Linear Hyperbolic Systems
(Journal article; Peer reviewed, 2013)Many interesting problems in the oil and gas industry face the challenge of responding to disturbances from afar. Typically, the disturbance occurs at the inlet of a pipeline or the bottom of an oil well, while sensing and ... -
Disturbance rejection of a High Speed Hydrofoil Craft using a Frequency Weighted H2-Optimal Controller
(Master thesis, 2018)The study presented in this report look into the design of a Ride Control System reducing wave-induced motions in heave, roll and pitch on a fully submerged hydrofoil craft sailing in 17 m/s. A frequency weighted, ... -
Disturbance Rejection using Conditional Integrators: Applications to path manoeuvring under environmental disturbances for single vessels and vessel formations
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:4, Doctoral thesis, 2011)In this thesis, two main topics are discussed: the application of conditional integrators for disturbance rejection, and how to apply this to path following and trajectory tracking of single marine vehicles and vehicle ... -
Disturbed body image and compulsive exercise in female eating disorder patients
(Doctoral thesis at NTNU;2013: 123, Doctoral thesis, 2016)Norsk sammendrag Bakgrunn: Kroppsbildeforstyrrelser og tvangspreget trening er definert som sentrale symptomområder hos pasienter med spiseforstyrrelser. Forskning har knyttet begge områdene til hele sykdomsforløpet; ... -
Disulfide-crosslinked alginate hydrogels functionalized with bioactive peptides for cell cultivation
(Master thesis, 2021)Hydrogeler av alginat er biokompatible og har lav immunologisk profil, noe som gjør dem attraktive for cellekultivering. På tross av disse ønskede egenskapene, vil alginat i seg selv ikke støtte viktige cellulære funksjoner ... -
Disulfiram repurposing combined with nutritional copper supplement as add-on to chemotherapy in recurrent glioblastoma (DIRECT): Study protocol for a randomized controlled trial
(Journal article; Peer reviewed, 2018)Background: Disulfiram (DSF) is a well-tolerated, inexpensive, generic drug that has been in use to treat alcoholism since the 1950s. There is now independent preclinical data that supports DSF as an anticancer agent, and ... -
Dither signal optimization for multi-agent extremum seeking control
(Chapter, 2020)In this paper we formulate and solve the problem of multi-agent extremum seeking with dither signals optimization. The solution is a distributed perturbation-based extremum-seeking controller with an additional objective ... -
Dither signals optimization in constrained multi-agent extremum seeking control
(Peer reviewed; Journal article, 2021)In this paper we consider the problem of optimization of a multi-agent system with constraints through perturbations-based extremum seeking control. We demonstrate that for such systems, effects of dither signals applied ... -
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(Master thesis, 2015) -
Diurnal and nocturnal movements of Kori Bustards in the Serengeti ecosystem
(Peer reviewed; Journal article, 2022)Although Kori Bustards (Ardeotis kori) are reported as diurnal, the species’ activity patterns have not been assessed to date. We report on the movement during different parts of the day of eight GPS-tagged individuals in ... -
Diurnal rhythms in the human urine metabolome during sleep and total sleep deprivation
(Peer reviewed; Journal article, 2015)Understanding how metabolite levels change over the 24 hour day is of crucial importance for clinical and epidemiological studies. Additionally, the association between sleep deprivation and metabolic disorders such as ... -
Divalent ligand-monovalent molecule binding
(Peer reviewed; Journal article, 2021)Simultaneous binding of a divalent ligand to two identical monovalent molecules is a widespread phenomenon in biology and chemistry. Here, we describe how two such monovalent molecules B bind to a divalent ligand AA to ... -
Divergence and constraint in the thermal sensitivity of aquatic insect swimming performance
(Peer reviewed; Journal article, 2020)Environmental temperature variation may play a significant role in the adaptive evolutionary divergence of ectotherm thermal performance curves (TPCs). However, divergence in TPCs may also be constrained due to various ... -
Divergence in rates of phenotypic plasticity among ectotherms
(Peer reviewed; Journal article, 2022)An individual's fitness cost associated with environmental change likely depends on the rate of adaptive phenotypic plasticity, and yet our understanding of plasticity rates in an ecological and evolutionary context remains ... -
Divergence in Thermal Reaction Norms of Life-History Traits Among Populations of Daphnia magna
(Master thesis, 2018)Patterns of phenotypic and genetic variance in thermal reaction norms allow predicting evolutionary response for a population. The ability of phenotypic traits to respond to selection depends on their genetic variance, and ... -
Divergence-conforming discretization for Stokes problem on locally refined meshes using LR B-splines
(Journal article; Peer reviewed, 2015)To solve the incompressible flow problems using isogeometric analysis, the div-compatible spline spaces were originally introduced by Buffa et al. (2011), and later developed by Evans (2011). In this paper, we extend the ... -
Divergence-free Isogeometric Methods for Flow in Porous Media
(Master thesis, 2012)This thesis is focused on solving the Darcy flow problem using divergence-free isogeometric methods, and comparing these results to the ones obtained using traditional finite element methods with Taylor Hood elements. A ... -
Divergent decennial trends in mental health according to age reveal poorer mental health for young people: Repeated cross-sectional population-based surveys from the HUNT Study, Norway
(Peer reviewed; Journal article, 2022)Objectives Public health trends are formed by political, economic, historical and cultural factors in society. The aim of this paper was to describe overall changes in mental health among adolescents and adults in a Norwegian ...