Browsing Fakultet for naturvitenskap (NV) by Title
Now showing items 8210-8229 of 12692
-
Online monitoring of aluminium primary production gas composition by use of Fourier-transform infrared spectroscopy
(Journal article; Peer reviewed, 2014)Online monitoring of aluminium primary production raw gas is challenging due to the high concentration of HF in the presence of water. Tunable Diode Laser (TDL) analyzers retrofitted with sapphire optical windows allow for ... -
Online PID Tuning for Unstable Processes: Application to Anti-Slug Control
(Master thesis, 2013)Slug flow is an undesired multiphase flow phenomena causing problems in the processing of oil and gas. Anti-slug control is therefore an important research topic. Satisfactory results have been achieved in anti-slug control ... -
Online Process Optimization with Active Constraint Set Changes using Simple Control Structures
(Journal article; Peer reviewed, 2019)The purpose of this paper is to show that online process optimization can be achieved using simple control structures without the need for solving numerical optimization problems online. In particular, we show that changes ... -
Onsager-symmetry obeyed in athermal mesoscopic systems: Two-phase flow in porous media
(Peer reviewed; Journal article, 2020)We compute the fluid flow time correlation functions of incompressible, immiscible two-phase flow in porous media using a 2D network model. Given a properly chosen representative elementary volume, the flow rate distributions ... -
ONTO-ToolKit: enabling bio-ontology engineering via Galaxy
(Journal article; Peer reviewed, 2010)Background: The biosciences increasingly face the challenge of integrating a wide variety of available data, information and knowledge in order to gain an understanding of biological systems. Data integration is supported by ... -
Ontogenetic timing of density dependence: location-specific patterns reflect distribution of a limiting resource
(Journal article; Peer reviewed, 2013)Theoretical considerations suggest that the relative abundance of age-specific limiting resources determines the ontogenetic timing of density dependence. Structural shelters may represent one such resource which can become ... -
Ontogeny of the digestive system in lumpfish (Cyclopterus lumpus L.) larvae in relation to growth and start feeding diet - A histological and stereological approach
(Master thesis, 2018)Global aquaculture production of Atlantic salmon (Salmo salar) has stabilized since 2012 due to high prevalence of the ectoparasitic sea lice (Lepeophtheirus salmonis). Deployment of lice-eating cleaner fish is considered ... -
Ontology Design for Representation of mathematical Models
(Master thesis, 2015)In this study, ontologies intended for structuring information of physical-chemical-biological processes has been presented. The ontologies was implemented in a tool, called the "Ontology Editor", that facilitate for ... -
Ontology-based Computer-aided modelling Tool
(Master thesis, 2012)A long-lived software project for using the advantages of a computer in modelling of physical-chemical-biological processes has been under development by supervisor Prof Heinz A. Preisig. The software is designed to assist ... -
Ontology-Based Domain Analysis for Model Driven Pervasive Game Development
(Journal article; Peer reviewed, 2018)Domain Analysis (DA) plays an important role in Model Driven Development (MDD) and Domain-Specific Modeling (DSM). However, most formal DA methods are heavy weight and not practical sometimes. For instance, when computer ... -
Ontology-Based Process Modelling-with Examples of Physical Topologies
(Journal article, 2021) -
Oocyte and egg quality indicators in European eel: lipid droplet coalescence and fatty acid composition.
(Journal article; Peer reviewed, 2018)During European eel assisted reproduction, timely administration of hormones that induce oocyte maturation and ovulation is a major factor influencing subsequent egg quality. This treatment commonly comprises one injection ... -
An Open Access Data Set Highlighting Aggregation of Dyes on Metal Oxides
(Peer reviewed; Journal article, 2020)The adsorption of a dye to a metal oxide surface such as TiO2, NiO and ZnO leads to deprotonation and often undesirable aggregation of dye molecules, which in turn impacts the photophysical properties of the dye. While ... -
An open access dataset for developing automated detectors of Antarctic baleen whale sounds and performance evaluation of two commonly used detectors
(Journal article; Peer reviewed, 2021) -
Open Systems and Measurement in Quantum Optics: The Photodetection Process and Master Equations
(Master thesis, 2010)All real quantum systems are open, and in particular in thefield of quantumoptics, the measurement process has always been a fundamental object of study.Naturally, simulating such systems and processes on computers is of ... -
Operando FTIR study of the NH3-SCR reaction over Cu/Al2O3 and Fe/Al2O3 catalysts
(Master thesis, 2018)The aim of this thesis was to perform an operando study of the NH3-SCR reaction using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and Mass Spectrometry (MS). The experiments were performed in a ... -
Operando studies of Mn oxide based electrocatalysts for the oxygen evolution reaction
(Peer reviewed; Journal article, 2023)Inspired by photosystem II (PS II), Mn oxide based electrocatalysts have been repeatedly investigated as catalysts for the electrochemical oxygen evolution reaction (OER), the anodic reaction in water electrolysis. However, ... -
Operation and feasibility of batch hetero-azeotropic distillation
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:47, Doctoral thesis, 2004)Separation of azeotropic mixtures is of great industrial importance and distillation is the dominating unit operation for such separations. However, the presence of azeotropes and non-idealities in the phase behaviour of ... -
Operational Experience and Control Strategies for a Stand-Alone Power System based on Renewable Energy and Hydrogen
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:28, Doctoral thesis, 2005)The topic of this thesis is investigation of a small-scale stand-alone power system, based on both experimental work and computer simulations. The power system in this study uses solar energy as energy input, lead-acid ... -
Operational Sex Ratio and Reproductive Behaviour in the Two-spotted Goby (Gobiusculus flavescens)
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:103, Doctoral thesis, 2011)Mating competition is an important process in sexual selection and can be expressed as complex courtship rituals and agonistic behaviours. The strength of mating competition is likely affected by mate availability. The ...