Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 27 for “"Anomalous behaviour"”.
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Anomalous behaviour detection using heterogeneous data
… can distinguish between normal and abnormal behaviour. Anomaly detection has been applied in many areas such as the medical sector, fraud detection in finance, fault detection in machines, intrusion detection in networks, surveillance systems for security, as well as forensic investigations. …
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Anomalous behaviour of molybdenum in steel welds
… quite small concentrations leads to a variety of anomalous microstructural and mechanical property effects. In some cases, the effects manifest even when there are no obvious changes in microstructure at the resolution of a transmission electron microscope. There are two particular discrepancies. …
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Anomalous behaviour detection for cyber defence in modern industrial control systems
… can be innovatively utilised to model anomalous behaviour as part of defence-in-depth strategies. As such, this research aims to investigate and develop a security mechanism to improve cyber defence in ICS. Firstly, this thesis contributes a Systematic Literature Review (SLR), which …
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The hydraulic transport of high concentration stabilized flow full plant mineral tailings
… and experimental investigation of the flow behaviour of high concentration stabilized mineral tailings used as backfill material. At high solids concentrations "anomalous" behaviour occurs and is indicated by diameter dependancy on rheogram curves. These curves are not coincident in the …
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The rheology and flow behaviour of high concentration mineral slurries
The rheology and flow behaviour of high concentration backfill tailings are investigated using a modified Balance Beam Tube Viscometer. The viscometer is capable of producing reliable data using a computer based data acquisition system and three different tube diameters. The aim of this research is …
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Wind turbine condition monitoring based on SCADA data
… Incipient failures are identified through anomalous behaviour in the variables of interest manifest in the SCADA data. This approach is first applied to individual wind turbines, but then extended to include other wind turbines operating under similar conditions to derive component …
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Distress Effects in Stock Returns
… are also microcap firms, thus attributing the anomalous behaviour of distressed stocks to a common factor with many other market anomalies. The economic implication is that arbitrage profits are likely to be limited due to the high transaction costs alongside the limited investment capacity …
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Dynamic image crowd representations for improved anomaly detection using generative adversarial networks
… and event planning. Effective analysis of crowd behaviour and anomaly detection has the potential for more efficient management and is a building block for smart environments. Closed-Circuit Televisions (CCTVs) capture vast footage and are an important information source, some of which contain …
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Non-business use of the World Wide Web : A study of selected Western Australian organisations
… their everyday work. The research has discovered anomalous behaviour on the part of non-business users who have employed a variety of techniques and tactics to mask their activities. Also, organisational management in the cases examined had demonstrated shortfalls in their perception of misuse …
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The role of philosophy in the establishment of a framework of values for educational practice in a pluralist South African society
… in particular this alienation, distrust and anomalous behaviour is examplified by disruption of school programmes in many ways. The question of how education may fulfil a more constructive binding function in such a heterogenous divided society was therefore a problem necessitating problem …
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Simulating Nanoparticle and Polymer Dynamics in Solution
… We investigate the microscopic origin of this anomalous behaviour using multi-particle collision dynamics (MPCD), an advanced algorithm for rigorously modelling solvent-mediated hydrodynamic interactions in coarse-grained, mesoscale simulations. We apply MPCD to study transport in …
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An autonomous host-based intrusion detection and prevention system for Android mobile devices. Design and implementation of an autonomous host-based Intrusion Detection and Prevention System (IDPS), incorporating Machine Learning and statistical algorithms, for Android mobile devices
… is, it builds a data-driven model for benign behaviour and looks for the outliers considered as suspicious activities. Any observation failing to match this model triggers an alert and the preventive agent takes proper countermeasure(s) to minimise the risk. The key novel characteristic of the …
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Multi-instrument studies of heavy ion solar energetic particle transport
… e.g. Fe/O often shows a decrease over time. This behaviour was identified as a common characteristic within the data. The time variation of 36 different ionic pairs was studied for a number of SEP events. The fit constant describing time evolution was found to show ordering by the value of S, …
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A study of some derivatives of brilliant green
… its coplanar and orthogonal extremes in the dye. Anomalous behaviour, for which reasoned arguments are presented, has been observed for 2-hydroxy-Brilliant Green, 2,6-dichloro-Brilli-ant Green and 2-Furyl Green.
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The chip-tool interface in metal cutting
… Previous workers have noted apparently anomalous behaviour; it is suggested that recent discoveries about the adhesion between metals and oxides help to explain these anomalies. The transparent tool is used to study the access of cutting lubricants to the chip/tool interface and the role …
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Identification of undesirable behaviour in CCTV footage using Deep Learning
… undergo a long and extensive training to spot anomalous behaviour in CCTV recording, but even with the acquired expertise, on average an operator will lose up to 45% of screen activities after 12 minutes, and up to 95% after 22 minutes. This research investigates a novel pipeline technique to …
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An investigation of the motion of liquid short chain molecules using Rayleigh-Brillouin spectroscopy
… frequency shift and elastic modulus show anomalous behaviour in the range 14-18°C. This suggests that oleic acid undergoes a change of phase to form a locally nematic structure about 5 °C above the melting point. Complementary measurements of viscosity, density and refractive index support …
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A study of benzazole derivatives showing large stokes shifts
… three pyridyl substituted benzimidazoles. The anomalous behaviour of 2-(2-pyridyl)- benzimidazole in alcohols relative to the 3- and 4-pyridyl analogues has been explained by facilitation of hydrogen transfer from the imidazole ring to the pyridine heteroatom by the alcohol . Rate constants for …
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Reactions and rearrangements of chroman-4-ones and related compounds
… a carbocation stabilising function show anomalous behaviour, the initially formed 1,4-benzoxazepinone being particularly susceptible to protolysis. 2-Methyl-2-phenylchromanone affords a 2-oxazoline as the major product, whilst 2-cyclopropyl-2- methylchromanone gives a mixture of five …
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Deciphering the Molecular Basis of the Species Barrier in Prion Disease Using Bank Vole PrP
… a mystery. Throughout this thesis, I explore the anomalous behaviour of BvPrP by creating in vivo and in vitro tools to decipher the molecular basis of the species barrier. We generated BvPrP knock-in mice to map and characterize the network of proteins that are found in the proximity of BvPrP, …
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