Browsing Doctoral theses (RealTek) by Issue Date
Now showing items 81-100 of 112
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The potential of molten salts as heat transfer media in fast pyrolysis of wood
(PhD Thesis;2015:1, Doctoral thesis, 2020-11-04)Growing energy consumption and greater environmental concerns have contributed to a need for more research on alternatives to fossil-derived products. Biomass such as wood is a potential source of renewable fuels and ... -
Analysis of land use / land cover change dynamics and underlying driving forces in the Lake Hawassa Watershed, Ethiopia, based on satellite remote sensing, GIS and field investigations
(PhD Thesis;2015:89, Doctoral thesis, 2020-11-04)Lake Hawassa Watershed, in the Central Rift Valley, is one of the most environmentally vulnerable areas in Ethiopia. The rapidly increasing population and vegetation clearance in search of farming and grazing land, firewood, ... -
Multiscale vibrational spectroscopy of pollen
(PhD Thesis;2016:10, Doctoral thesis, 2020-11-19)Pollen has a vital role in the reproduction of flowering plants by producing genetically diverse offspring via pollination. Environmental effects have strong influence on reproductive structures of plants, including on ... -
Sustainable fungal biorefineries : optimizing production of valuable metabolites in oleaginous Mucoromycota
(PhD Thesis;2021:25, Doctoral thesis, 2021)Fungal biorefineries are important players in the emerging global bioeconomy and contribute to the transition from the traditional fossil-based production to a renewable, sustainable and environment-friendly bio-production. ... -
Fremmedvann i avløpsnettet - analyser av påvirkningsfaktorer, konsekvenser og mulige tiltak
(PhD thieses;2021:36, Doctoral thesis, 2021)Fremmedvann har fått et økt fokus både i Norge og i internasjonale forskningsmiljø de siste årene. Likevel har veldig mange norske kommuner fortsatt veldig høye andeler fremmedvann i avløpsnettet. Undersøkelser av ... -
Explainable and data-efficient learning for visual guidance of autonomous agri-robots
(PhD Thesis;2021:73, Doctoral thesis, 2021)To feed a growing world population and achieve the goal of zero hunger, we must develop new technologies to improve farm productivity and sustainability. Agri-robots can be a part of this solution, but new research is ... -
Methods for estimation of major forest attributes based on remotely sensed data for the support of REDD+ measurement, reporting and verification (MRV)
(PhD Thesis;2021:20, Doctoral thesis, 2021)There is limited information about the status of forest resources in Ethiopia. The available reports based on field sampling are inconsistent and lack precision due to limited sample sizes. Remotely sensed data, which cover ... -
Ambient vibration testing of civil engineering structures: development of a Python module and applications to case studies
(Phd Thesis;2021:47, Doctoral thesis, 2021)This thesis treats ambient vibration testing of civil engineering structures with a special attention given to timber structures. It presents an open-source Python module that allows to perform two very much used output-only ... -
Biofuel production potential of Jatropha curcas L: oil characterization for biodiesel production, and enhancing the biogas production potential of various residues using different pretreatment methods
(PhD Thesis;2021:21, Doctoral thesis, 2021)Increasing global fuel prices, growing energy consumption, and profound environmental concerns are the key factors that motivated the search for alternative energy sources. Biofuels such as bioethanol, biodiesel, and biogas ... -
Row following based navigation systems for agricultural robots
(PhD Thesis;2021:3;, Doctoral thesis, 2021)The main goal of the thesis is to study methods to follow row-like structures in agricultural scenarios by using low-cost hardware components to create an environment-aware robotic system. The objective is not only to ... -
Drivers behind variation in welfare, quality, and production performance in Atlantic salmon farming production data
(PhD Thesis;2021:46, Doctoral thesis, 2021)Atlantic salmon aquaculture is an important industry in Norway and farmed salmon is among the most economically important global aquaculture species. Despite this, the growth of the industry has stagnated in Norway and it ... -
Press ‘run’ to improve mathematical expertice (PRIME)
(PhD Thesis;2022:55, Doctoral thesis, 2022)Press Run to Increase Mathematical Expertise (PRIME) investigates the implementation of programming in the mathematics classroom in upper secondary schools in Norway through the lens of designing mathematical programming ... -
A classroom study : students’ creative collaborative mathematical reasoning and teacher actions : design principles for learning of and through CCMR competency
(PhD Thesis;2022:56, Doctoral thesis, 2022)This design-based research study presents results based on observations and analysis of student–student and student–teacher interactions in a Norwegian upper secondary school. The aim of this study was to examine student ... -
Experimental and theoretical evaluation of thermodynamic properties of low melting chlorides suitable for liquefaction of biomass
(Phd Thesis;2022:59, Doctoral thesis, 2022)For many decades, molten salts have been employed in various industries due to their thermodynamic and physical properties. Climate change and the importance of renewable energy to stave off the worsening effects of rising ... -
Kostnadseffektiv håndtering av overvann og urban flom i en by i vekst og i et klima i endring
(PhD thesis;2022:24, Doctoral thesis, 2022)Utfordringer knyttet til overvann og urban flom som følge av klimaendringer og fortetting er og vil være et viktig tema i årene fremover. Tradisjonelt transporteres overvann i lukkede overvanns- og avløpssystemer som ... -
Modelling scattering and absorption in the vibrational spectroscopy of cells and tissues
(PhD Thesis;2022:53, Doctoral thesis, 2022)Infrared spectroscopy has in the past decades grown to become one of the most widely used analytical techniques for biochemical characterization of biological materials. Since the technique is non-destructive, it allows ... -
Machine learning-based perception to identify and localize pickable strawberries for harvester robots
(Phd Thesis;2022:16, Doctoral thesis, 2022)Development of agricultural harvesting robots is one of the solutions to the problems of decreasing labor availability, and improving farm productivity and sustainability. A vision system that can provide reliable detection ... -
Resolving snow challenges for increased deployment of photovoltaic systems
(PhD Thesis;2022:77, Doctoral thesis, 2022)Photovoltaic (PV) systems are becoming more competitive due to a cost reduction of the technology and increased electricity prices. As the technology extends to cold climates with lower irradiance, a knowledge gap in how ... -
Airborne hyperspectral imaging for multisensor data fusion
(PhD Thesis;2023:18, Doctoral thesis, 2023)Multisensor data fusion demand in Earth observations is constantly increasing thanks to technological advances and the willingness to explore the Earth in a multidisciplinary way. Recently hyperspectral imaging has become ... -
New understanding of gas hydrate phenomena and natural inhibitors in crude oil systems through mass spectrometry and machine learning
(PhD thesis;2023:35, Doctoral thesis, 2023)Gas hydrates represent one of the main flow assurance issues in the oil and gas industry as they can cause complete blockage of pipelines and process equipment, forcing shut downs. Previous studies have shown that some ...