Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 3239-3258 of 9944
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Fossil pollen and spores as a tool for reconstructing ancient solar-ultraviolet irradiance received by plants: an assessment of prospects and challenges using proxy-system modelling
(Peer reviewed; Journal article, 2019)Ultraviolet-B radiation (UV-B, 280–315 nm) constitutes less than 1% of the total solar radiation that reaches the Earth's surface but has a disproportional impact on biological and ecological processes from the individual ... -
Four billion years of ophiolites reveal secular trends in oceanic crust formation
(Peer reviewed; Journal article, 2014-07)We combine a geological, geochemical and tectonic dataset from 118 ophiolite complexes of the major global Phanerozoic orogenic belts with similar datasets of ophiolites from 111 Precambrian greenstone belts to construct ... -
Fourier analysis on abelian groups; theory and applications
(Master thesis, 2017)Fourier analysis expresses a function as a weighted sum of complex exponentials. The Fourier machinery can be applied when a function is defined on a locally compact abelian group (LCA). The groups R, T = R / Z, Z and Z_n ... -
Fourier Transform Infrared Spectroscopy Combined with Partial Least Squared Regression and Standard Addition-Net Analyte Signal Method for Quantification of Chitin in Insect-based Fish Feeds
(Master thesis, 2018-10-25)Fourier transform infrared spectroscopy (FTIR) spectroscopy is a rapid and non-destructive technique applied with little or no sample preparation step. This work presents the use of FTIR spectroscopy combined with partial ... -
FPT Algorithms for Diverse Collections of Hitting Sets
(Peer reviewed; Journal article, 2019-11-27)In this work, we study the d-Hitting Set and Feedback Vertex Set problems through the paradigm of finding diverse collections of r solutions of size at most k each, which has recently been introduced to the field of ... -
FPT Approximation for Fair Minimum-Load Clustering
(Journal article; Peer reviewed, 2022)In this paper, we consider the Minimum-Load k-Clustering/Facility Location (MLkC) problem where we are given a set P of n points in a metric space that we have to cluster and an integer k > 0 that denotes the number of ... -
Fractal hypothesis of the pelagic microbial ecosystem-can simple ecological principles lead to self-similar complexity in the pelagic microbial food web?
(Peer reviewed; Journal article, 2015-12-01)Trophic interactions are highly complex and modern sequencing techniques reveal enormous biodiversity across multiple scales in marine microbial communities. Within the chemically and physically relatively homogeneous ... -
Fractal structures in freezing brine
(Peer reviewed; Journal article, 2017-09)The process of initial ice formation in brine is a highly complex problem. In this paper, we propose a mathematical model that captures the dynamics of nucleation and development of ice inclusions in brine. The primary ... -
Fracture formation due to differential compaction under glacial load: a poro-elastoplastic simulation of the Hugin Fracture
(Journal article; Peer reviewed, 2021)The Hugin Fracture, discovered in 2011, is an approximately 3.5 km long seafloor fracture in the North Sea. This fracture was unexpected and, due to the geology in the North Sea no obvious explanation could be found. In ... -
Fracture patterns in a fold – a case study from Bude, UK
(Master thesis, 2021-03-05)Fracture patterns in a well-exposed folded Carboniferous sandstone and shale sequence at Bude, SW England, have been analysed, and the use of such surface analogues for modelling fracture systems is discussed. Each fracture ... -
Fracture-generated permeability and groundwater yield in Norway
(Peer reviewed; Journal article, 2002)The transport of groundwater in bedrock is largely determined by interconnected fractures and their apertures. The conditions by which fractures become interconnected are thus of primary importance in understanding ... -
Framework for an Ocean-Connected Supermodel of the Earth System
(Journal article; Peer reviewed, 2023)A supermodel connects different models interactively so that their systematic errors compensate and achieve a model with superior performance. It differs from the standard non-interactive multi-model ensembles (NI), which ... -
A framework for integrating data, models and visualisation tools to understand fish migration pattern
(Master thesis, 2019-06-29) -
A framework for the development of a global standardised marine taxon reference image database (SMarTaR-ID) to support image-based analyses
(Peer reviewed; Journal article, 2019-12-31)Video and image data are regularly used in the field of benthic ecology to document biodiversity. However, their use is subject to a number of challenges, principally the identification of taxa within the images without ... -
A Framework for the Development, Design and Implementation of a Sustained Arctic Ocean Observing System
(Peer reviewed; Journal article, 2019-08-08)Rapid Arctic warming drives profound change in the marine environment that have significant socio-economic impacts within the Arctic and beyond, including climate and weather hazards, food security, transportation, ... -
Francisella philomiragia subsp. noatunensis i torskeleukocytter
(Master thesis, 2009-06-22)Det er velkjent at en rekke intracellulære bakterier, inkludert flere arter innen slekten Francisella, har evne til å oppholde seg og formere seg i immuncellene. I dette studiet ble det utført smitteforsøk in vitro der det ... -
Frazil ice formation in ice shelf water plume
(Journal article, 2004-03-17)We present a model for the growth of frazil ice crystals and their accumulation as marine ice at the base of Antarctic ice shelves. The model describes the flow of buoyant water upward along the ice shelf base and includes ... -
Free Fatty Acid Profiling of Metabolic Syndrome Blood Serum by Gas Chromatography-Mass Spectrometry
(Master thesis, 2015-09-10)It is estimated that 20-25% of adults in the world have metabolic syndrome (MetS), and in Chinese population this has become an important public health problem. MetS is characterized as cluster of metabolic disorders that ... -
Free-standing, axially-symmetric diffraction gratings for neutral matter-waves: experiments and fabrication
(Doctoral thesis, 2011-10-04)Since de Broglie’s famous postulation of the wave-nature of material particles and its subsequent experimental verification, it is known that atoms and molecules behave like waves on a small scale. The investigation of ...