Hughes, N.P. (1999). Artefactual Structure from Topographic Mappings. Masters thesis, Aston University.
Abstract
This thesis is a study of the problem of artefactual structure from topographic mappings, in particular Sammon’s Mapping and its close relative Metric Multidimensional Scaling. Such structure is termed artefactual because it is not representative of true underlying structure in the data and is a side-effect of the mapping algorithm. The problem is investigated from both an experimental and a theoretical standpoint, and it is found that the choice of distance metric in the mapping algorithm is fundamental to the degree of artefactual structure observed. The results of this work are then used to gain insight into a recent and controversial use of techniques from Multidimensional Scaling in the analysis of the connectivity of regions in the macaque monkey visual cortex. In particular it has been debated in the academic literature the extent to which the resulting mappings are corrupted by artefactual structure. This premise is investigated experimentally and the support of the mappings for the “two streams” hypothesis of visual processing is discussed in detail.
| Publication DOI: | https://doi.org/10.48780/publications.aston.ac.uk.00021471 |
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| Additional Information: | Copyright © N.P. Hughes, 1999. N.P. Hughes asserts their moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately., YEAR. AUTHOR asserts their moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately. |
| Institution: | Aston University |
| Uncontrolled Keywords: | topographic mapping,artefactual structure,applied mathematics,computer science |
| Last Modified: | 11 Apr 2025 11:44 |
| Date Deposited: | 19 Mar 2014 11:40 |
| Completed Date: | 1999-09 |
| Authors: |
Hughes, N.P.
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