Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 1973-1992 of 9934
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Dimensional reduction of a fractured medium for a polymer EOR model
(Journal article; Peer reviewed, 2021)Dimensional reduction strategy is an effective approach to derive reliable conceptual models to describe flow in fractured porous media. The fracture aperture is several orders of magnitude smaller than the characteristic ... -
Dimensional reduction of a fractured medium for a two-phase flow
(Journal article; Peer reviewed, 2022)We consider a porous medium containing a single fracture, and identify the aperture to length ratio as the small parameter ɛ with the fracture permeability and the fracture porosity scaled as exponents of ɛ. We consider a ... -
Dimensjonering av asynkronmotor for traktor
(Master thesis, 2022-06-01)Rapporten om asynkronmotor for traktor dekker mesteparten av teoretisk og matematisk arbeid knyttet til oppgavens mål. Metodene knyttet til dimensjonering av maskinen er i samsvar med dagens teknologi og marked. Det har ... -
Dimethyl 3,3′-dimethoxybiphenyl-4,4′-dicarboxylate
(Peer reviewed; Journal article, 2014)In the title compound, C18H18O6, the biphenyl moiety is twisted with a dihedral angle of 29.11 (10)°. The carbomethoxy groups form C-C-C-O torsion angles of -18.3 (3) and -27.7 (3)° with the attached rings, as a result ... -
Diminishing returns on labour in the global marine food system
(Journal article; Peer reviewed, 2023)Technological advances over the past century have greatly reduced the proportion of human labour required to produce the world’s food. On land, these advances have continually increased yields, feeding a growing human ... -
DimLift: Interactive Hierarchical Data Exploration through Dimensional Bundling
(Journal article; Peer reviewed, 2021)The identification of interesting patterns and relationships is essential to exploratory data analysis. This becomes increasingly difficult in high dimensional datasets. While dimensionality reduction techniques can be ... -
Dinoflagellate cyst stratigraphy and palaeoenvironment of the "Utsira Sand" in the northern North Sea
(Master thesis, 2014-11-20)Safe CO_2 storage in the Utsira Formation is one of many solutions to climate change mitigation. A major leakage had occurred in the Utsira Formation in 2008, due to water injection in what was believed to be the Utsira ... -
Direct absorption solar collector: Use of nanofluids and biodegradable colloids
(Journal article; Peer reviewed, 2023)In this paper, an experimental and numerical analysis was performed on both carbon black nanofluids and a biodegradable fluid in a novel pump-free direct absorption solar collector (DASC). In the experiments, the nanofluid ... -
Direct and Indirect Effects of Surface Fluxes on Moist Baroclinic Development in an Idealized Framework
(Journal article; Peer reviewed, 2020-09)The convoluted role of surface sensible and latent heat fluxes on moist baroclinic development demands a better understanding to disentangle their local and remote effects. Including diabatic effects in the Eady model, the ... -
Direct and indirect electron precipitation effect on nitric oxide in the polar middle atmosphere, using a full-range energy spectrum
(Peer reviewed; Journal article, 2017)In April 2010, a coronal mass ejection and a corotating interaction region on the Sun resulted in an energetic electron precipitation event in the Earth’s atmosphere. We investigate direct and indirect nitric oxide (NO) ... -
Direct constraint on the Higgs–charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector
(Journal article; Peer reviewed, 2022)A search for the Higgs boson decaying into a pair of charm quarks is presented. The analysis uses proton–proton collisions to target the production of a Higgs boson in association with a leptonically decaying W or Z boson. ... -
A direct construction of even length ZCPs with large ZCZ ratio
(Journal article; Peer reviewed, 2022)This paper presents a direct construction of aperiodic q-ary (q is a positive even integer) even length Z-complementary pairs (ZCPs) with large zero-correlation zone (ZCZ) width using generalised Boolean functions (GBFs). ... -
Direct Construction of Optimal Z-Complementary Code Sets With Even Lengths by Using Generalized Boolean Functions
(Journal article; Peer reviewed, 2022)The Z-complementary code set (ZCCS) is well-known for being used in multicarrier code-division multiple access (MC-CDMA) systems to provide interference-free communication in a quasi-synchronous environment. Based on the ... -
Direct data transfer between SOAP web services in Orchestration
(Chapter; Peer reviewed, 2012)In scientific data analysis, workflows are used to integrate and coordinate resources such as databases and tools. Workflows are normally executed by an orchestrator that invokes component services and mediates data transport ... -
The Direct Effect of Medium Energy Electron Precipitation on Mesospheric Dynamics During a Sudden Stratospheric Warming Event in 2010
(Journal article; Peer reviewed, 2022)Medium energy electron (MEE) (30–1,000 keV) precipitation enhances the production of nitric (NOx) and hydrogen oxides (HOx) throughout the mesosphere, which can destroy ozone (O3) in catalytic reactions. The dynamical ... -
Direct image-to-geometry registration using mobile sensor data
(Peer reviewed; Journal article, 2016)Adding supplementary texture and 2D image-based annotations to 3D surface models is a useful next step for domain specialists to make use of photorealistic products of laser scanning and photogrammetry. This requires a ... -
Direct Injection Electrospray Mass Spectrometry (DI-ESI-MS) and Liquid Chromatography Electrospray Mass Spectrometry (LC-ESI-MS) method development for characterisation of organic acids in petroleum and bio-oil samples
(Master thesis, 2017-05-09)Analysis and characterisation of complex mixtures such as petroleum and bio-oils are unarguably challenging. Finding suitable analytical method therefore needs to be considered carefully by analytical chemists. Electrospray ... -
Direct measurements of the mean flow and eddy kinetic energy structure of the upper ocean circuletion in the NE Atlantic
(Journal article, 2005-07-19)The upper ocean circulation in the sub-polar northeast Atlantic has been a challenge to quantify due to strong and variable wind-forcing, and strong and variable deep currents that lead to large uncertainties in the use ... -
Direct observation of the dead-cone effect in quantum chromodynamics
(Journal article; Peer reviewed, 2022)In particle collider experiments, elementary particle interactions with large momentum transfer produce quarks and gluons (known as partons) whose evolution is governed by the strong force, as described by the theory of ... -
Direct observations of anomalous resistivity and diffusion in collisionless plasma
(Journal article; Peer reviewed, 2022)Coulomb collisions provide plasma resistivity and diffusion but in many low-density astrophysical plasmas such collisions between particles are extremely rare. Scattering of particles by electromagnetic waves can lower the ...