I received my MPhys degree at Warwick University. For my masters project I modelled a magnetic spin system, applying varying external forces to cause the spin states to change. This was to drive a thermodynamic system to produce a cooling cycle.
My PhD project involves the use of signal processing to extract useful sample information from measured data. Recently I have written code to apply a sparse deconvolution method, which excels at distinguishing thin layers of materials. THz has a strong potential in biomedical applications, as it is highly sensitive to the water content of skin. Many skin conditions, such as melanoma, vary in water content compared to healthy tissue. To better understand results which could indicate a skin condition in a patient I am investigating the usual variation in measurements between people, and what factors affect these results.
Signal processing, THz TDS, THz in vivo skin measurements, compressed sensing, patient independent parameters, sparse deconvolution, finite rate of innovation, frequency wavelet domain deconvolution.
I am currently demonstrating first year labs.
X. R. Barker and E. Pickwell-MacPherson, 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves, "Finite Rate of Innovation Principle Applied to Terahertz Signals" (IEEE, 2020).
X. R. Barker and E. Pickwell-MacPherson, 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves, "In vivo THz Measurements of Human Skin: Investigating the Dependence on Ethnicity and Arm Dominance" (IEEE, 2019).
2020 8-13 November, IRMMW-THz Conference, USA, New York
Poster: 'Finite Rate of Innovation Principle Applied to Terahertz Signals'
2019 4-5 December, TERANET UK-THz Meeting, UK, London
Poster: 'Adapting Sparse Deconvolution for in vivo skin Measurements'
2019 1-6 September, IRMMW-THz Conference, Paris, France
Poster: 'In vivo THz Measurements of Human Skin: Investigating the Dependence on Ethnicity and Arm Dominance'
Position: PhD Student
Start Date: October 2018
Supervisor: Emma MacPherson
Address: Department of Physics, University of Warwick, Coventry, CV4 7AL, UK.