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13 results on '"Groves, Katie"'

1. 2L-3W: 2-Level 3-Way Hardware-Software Co-Verification for the Mapping of Deep Learning Architecture (DLA) onto FPGA Boards

Author

Odetola, Tolulope A., Groves, Katie M., and Hasan, Syed Rafay

Subjects
Computer Science - Machine Learning, Statistics - Machine Learning
Abstract

FPGAs have become a popular choice for deploying deep learning architectures (DLA). There are many researchers that have explored the deployment and mapping of DLA on FPGA. However, there has been a growing need to do design-time hardware-software co-verification of these deployments. To the best of our knowledge this is the first work that proposes a 2-Level 3-Way (2L-3W) hardware-software co-verification methodology and provides a step-by-step guide for the successful mapping, deployment and verification of DLA on FPGA boards. The 2-Level verification is to make sure the implementation in each stage (software and hardware) are following the desired behavior. The 3-Way co-verification provides a cross-paradigm (software, design and hardware) layer-by-layer parameter check to assure the correct implementation and mapping of the DLA onto FPGA boards. The proposed 2L-3W co-verification methodology has been evaluated over several test cases. In each case, the prediction and layer-by-layer output of the DLA deployed on PYNQ FPGA board (hardware) alongside with the intermediate design results of the layer-by-layer output of the DLA implemented on Vivado HLS and the prediction and layer-by-layer output of the software level (Caffe deep learning framework) are compared to obtain a layer-by-layer similarity score. The comparison is achieved using a completely automated Python script. The comparison provides a layer-by-layer similarity score that informs us the degree of success of the DLA mapping to the FPGA or help identify in design time the layer to be debugged in the case of unsuccessful mapping. We demonstrated our technique on LeNet DLA and Caffe inspired Cifar-10 DLA and the co-verification results yielded layer-by-layer similarity scores of 99\% accuracy.

Published
2019

2. Visual body perception : towards identifying objective markers of body image disturbance in brain and behaviour

Author

Groves, Katie

Subjects
616.85, BF Psychology
Abstract

Previous research has shown that the brain processes bodies distinctively from other stimuli. Little research however, has addressed whether visual body perception is modulated by the observer’s conscious experience of their own body (body image). This thesis was therefore dedicated to investigating the relationship between body image disturbance and visual body perception, with the aim of identifying potential objective markers of body image disturbance in brain and behaviour. Initially, the suitability of headless body stimuli was assessed and electroencephalogram (EEG) was employed in order to evaluate the stability of early occipito-parietal (P1, N1) and fronto-central (VPP) visual event-related potentials (ERPs), including body-sensitive effects. A series of studies were then designed to investigate behavioural configural processing mechanisms and the early temporal dynamics of visual body perception (P1, N1, VPP), including the perception of own- and other- identity, in women with and without a history of disorders characterised by body image disturbance, such as eating disorders (EDs) and/or body dysmorphic disorder (BDD). Results confirmed the suitability of headless body stimuli, and of early visual ERP responses and their associated body-sensitivity for investigating visual body processing mechanisms. Further to this, ED participants, not controls, were found to elicit a rapid P1-N1 complex as well as gender-sensitive N1/VPP responses to other women’s bodies; effects which were associated with ED symptomatology. Moreover, results indicated rapid atypical gender-sensitive identity perception in those with EDs/BDD. Finally, behavioural evidence for configural body processing disturbance was found in those recovering from EDs and BDD, as well as in adolescents ‘at risk’ of developing such disorders. It is thus concluded that processes indicative of visual body perception, in both brain and behaviour, present atypically in women who have experienced EDs/BDD. Importantly, rapid visual ERP responses, as well as early gender-sensitive ERP effects, appear to be potential neural markers of ED symptomatology.

Published
2017

9. Evidence for altered configural body processing in women at risk of disorders characterized by body image disturbance.

Author

Groves, Katie, Kennett, Steffan, and Gillmeister, Helge

Subjects
*FACIAL anatomy, *BODY image, *CONVALESCENCE, *RISK assessment, *SELF-perception, *SEX distribution, *VISUAL perception, *HOME environment, *ADOLESCENCE
Abstract

Two studies were conducted to assess appearance‐related visual processing mechanisms in populations at risk of disorders characterized by body image disturbance. Using inverted stimuli, Experiment 1 assessed visual processing mechanisms associated with body, face, and house viewing in adolescents. Experiment 2 applied the same protocol to assess appearance‐related configural processing in high‐ and low‐risk adolescent women, and women recovering from disorders characterized by body image disturbance. Experiment 1 found evidence for typical configural face and body processing, although adolescent women reported higher levels of body image concern (BIC) and self‐objectified to a greater extent than adolescent men. In Experiment 2, typical body inversion effects were seen in the low‐risk group, whilst there was some evidence to suggest a disruption to the configural processing of body stimuli in high‐risk adolescents and in women recovering from body image disorders. Women in recovery were also quicker to respond to all stimuli, whilst high‐risk adolescents took longer to respond to bodies than to other stimuli. Configural face processing was intact in all groups, and effects did not directly relate to BIC or self‐objectification. These findings have implications for future research looking to inform early interventions and treatment, suggesting that there could be a tendency to visually process individual body parts at the expense of the whole‐body form in women at risk of developing body image disorders, as well as those in recovery. [ABSTRACT FROM AUTHOR]

Published
2020
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