Research interests

• Novel permanent magnet machines including single and hybrid excited switched flux permanent magnet machines
• Design of novel switched reluctance machines and their drives including direct torque control and hybrid current control
• Fault tolerance, fault modelling and diagnostics (inter-turn and phase shirt-circuit) of permanent magnet machines
• Thermal modelling of electrical machines
• Renewable energy and low emission transportation including wind power, electrical/hybrid vehicles, more electrical aircraft

Research interests

• Novel permanent magnet machines and actuators (including linear machines)
• High-speed brushless machines
• Low-speed high-torque direct-drive permanent magnet machines
• Low-cost single-phase permanent magnet motors
• Direct torque control of permanent magnet brushless motors
• Sensorless control of permanent magnet brushless dc and ac drives
• Parameter and condition identification of permanent magnet brushless machines
• Intelligent control of permanent magnet brushless drives (including fuzzy logic, extended Kalman filter, sliding mode, and model reference etc)
• Novel PWM strategies
• Noise and vibration
• Wind power generation
• Power trains for electric vehicles and hybrid electric vehicles
• More electric aircraft

Research interests

• Power electronics for enhanced power quality
• Advanced control of power electronic systems
• Modulation strategies for power electronics converters
• Mathematical modelling of PWM harmonic spectra
• Multisampling
• Multilevel power electronics convertors
• Micro-grids
• Power system stability
• Modelling of uncertain systems and robust stability
• Diagnostics and prognostics for drive systems
• More Electric Aircraft

Research interests

• Direct antenna modulation
• Reconfigurable antennas for cellular applications
• Metasurface and metamaterial design

• Radar signature management
• Active radar absorbers
• Phase modulating microwave structures
• Antennas
• Phased array antennas and systems
• Adaptive optimisation techniques
• Acoustic arrays and imaging systems

I earned a Bachelor's degree in Computer Engineering followed by an MSc in Data Communication Engineering at the University of Sheffield. Then, I pursued a PhD with a focus on translational digital engineering in chronic conditions to sustain behaviour change.

I have had the privilege of holding several postdoctoral research associate roles in the Electronic and Electrical Engineering Department at the University of Sheffield. In these roles, I focused on researching novel statistical, machine learning and AI models and biomarkers. I've also ventured into digital healthcare technology with a mission to make it more inclusive and efficient. I've had the opportunity to collaborate closely with the Royal College of Arts, combining design and technology to create user-friendly healthcare solutions. My emphasis in this endeavour has been on highlighting the potential of digital technologies to enhance care, especially for vulnerable populations.

Research interests

• Development of new methods and technology for the growth, processing and characterisation of III-V photonic devices and nanostructures.

Research interests

Prof Stone has interests in all facets of power electronics and energy storage, including:

• Development of ‘smart’ battery packs for all-electric and hybrid-electric vehicles, based on both Li-based chemistries, Ni-MH and VRLA cells containing cell state-of-charge monitoring and conditioning electronics to extend the lifetime of the cells. Incorporation of observer techniques into state of function monitoring for cells to increase operation lifetime and consumer confidence in battery technology.
• Investigation into second life operation of EV batteries for Grid support and localised energy storage.
• High efficiency EV-contact less battery charging
• Modelling and control of novel fluorescent lamps to improve the efficiency of light generation. Incorporation of physical lamp models (based on electron energy level interactions) into both Simulink and spice based packages has led to novel lamp models based on the physical interactions within the plasma
• Design, modelling and digital control of high-order resonant converter topologies for high frequency switched mode power supplies for use in ‘white goods’, and concentrates on the analysis and design of high order resonant converter topologies, with the inclusion of piezzo electric transformers where possible.
• Investigation into high frequency, high power, resonant converters for induction heating applications. Continuing work is now looking at the use of high frequency matrix converters (operating above 150kHz) for direct ac-ac conversion for heating applications.
• Design and digital control of matrix converters for aerospace and sub-sea applications in specialist environments.
• Power Electronics Packaging for high temperature and harsh environments, including high temperature gate drive design and thermal management of converters

Research interests

• 6G/5G radio access technologies
• Building wireless performance modelling, evaluation and optimisation
• Modelling and design of smart built environments for wireless communications, e.g., intelligent reflecting surfaces
• Deep neural networks and machine learning for radio propagation modelling
• Data-driven proactive network optimisation
• Interactions between wireless communications and artificial intelligence (e.g., deep neural networks)
• Millimetre wave communications in the built environments

My industrial expertise is in designing efficient, specialized, and scalable hardware architecture for CNN, GEMM and image/video processing on FPGAs and ASIC.

• FPGA-based Hardware Acceleration
• Sparse Processing Architecture for CNN and GEMM
• Number System and Approximation Computing
• High-level Design Environment

Research interests

• Modelling and stability analysis of AC and hybrid AC/DC power systems
• Power electronics and systems for vehicular applications
• More electric aircraft technologies
• Control of electric drives
• Sensorless control of permanent magnet brushless dc and ac drives
• Thermal modelling of permanent magnet machines
• Fault modelling and detection in permanent magnet machines
• Real time modelling and hardware in the loop testing methodologies

Research activities are focussed on design and implementation of dedicated circuits and systems for communications and signal processing. Current activities include:

• Design and implementation of cryptosystems
• Design and implementation of error-control coding systems
• Reconfigurable Hardware design
• Healthcare engineering
• Galois fields arithmetic circuits
• Residue number systems

Research Interests

• Epitaxy of ultra-pure materials
• Self assembled Quantum Dots and site controlled growth
• Optical Monitoring techniques during Epitaxy
• II-IV-Nitride Materials
• Molecular Beam Epitaxy of 2D Materials
• Epitaxy of dissimilar materials by Van der Waals epitaxy or Interfacial Misfit Dislocations

• Coherent Diffractive Imaging (CDI)
• Ptychography
• Computer-generated holography
• Phase imaging in the Transmission Electron Microscope (TEM)
• Inverse Problems
• Image Processing

Research interests

• Applications of machine learning to climate control of non-domestic buildings – energy saving and model predictive control
• Multi-objective genetic programming, especially for dynamical modelling of systems and control applications
• Applications of artificial intelligence to process control

Research interests

Trying to understand how materials, in particular semiconductor nano-structures, grow by investigating their defects, their crystallography and chemistry; measurement of diffusion and segregation in solids by:

• Transmission Electron Microscopy (TEM)
• High-Resolution Electron Microscopy (HREM)
• Annular Dark-Field imaging (ADF) and Z-contrast in Scanning TEM (STEM)
• Electron Energy-Loss Spectroscopy (EELS), including Energy-Loss Near-Edge Structure (ELNES)
• Energy-Dispersive X-ray Spectroscopy (EDXS)
• atomic image simulation
• hyperspectral data processing