All Outputs (3398)

Quantifying the validity conditions of the Beckmann-Kirchhoff scattering model (2022)
Presentation / Conference Contribution
Hooshmand, H., Liu, M., Leach, R., & Piano, S. (2022). Quantifying the validity conditions of the Beckmann-Kirchhoff scattering model. In D. Kim, H. Choi, & H. Ottevaere (Eds.), Proc. SPIE 12221, Optical Manufacturing and Testing XIV. https://doi.org/10.1117/12.2639003

Approximate and rigorous methods are widely used to model light scattering from a surface. The boundary element method (BEM) is a rigorous model that accounts for polarisation and multiple scattering effects. BEM is suitable to model the scattered li... Read More about Quantifying the validity conditions of the Beckmann-Kirchhoff scattering model.

Two-dimensional TE Series Node Transmission-Line Modelling Based on Unstructured Triangular Meshes (2022)
Presentation / Conference Contribution
Yan, K., Vukovic, A., & Sewell, P. (2022). Two-dimensional TE Series Node Transmission-Line Modelling Based on Unstructured Triangular Meshes. In 2022 52nd European Microwave Conference (EuMC 2022) (448-451). https://doi.org/10.23919/eumc54642.2022.9924316

The transmission-line modelling (TLM) method has been widely applied to many areas of electromagnetic simulations. This paper presents the development of the series TE model for the TLM method based on triangular meshes. The 2D series unstructured TL... Read More about Two-dimensional TE Series Node Transmission-Line Modelling Based on Unstructured Triangular Meshes.

ScoutWav: Two-Step Fine-Tuning on Self-Supervised Automatic Speech Recognition for Low-Resource Environments (2022)
Presentation / Conference Contribution
Fatehi, K., Torres, M. T., & Kucukyilmaz, A. (2022). ScoutWav: Two-Step Fine-Tuning on Self-Supervised Automatic Speech Recognition for Low-Resource Environments. In Proceedings of Interspeech 2022 (3523-3527). https://doi.org/10.21437/Interspeech.2022-10270

Recent improvements in Automatic Speech Recognition (ASR) systems obtain extraordinary results. However, there are specific domains where training data can be either limited or not representative enough, which are known as Low-Resource Environments (... Read More about ScoutWav: Two-Step Fine-Tuning on Self-Supervised Automatic Speech Recognition for Low-Resource Environments.

Do Look Up: A young generation's perspective on Planetary Defense (2022)
Presentation / Conference Contribution
Gloder, A., Cader, S., Austen, E., Choudhary, M., Garcia-Bonilla, J., Vizireanu, A., …Sarli, B. (2022). Do Look Up: A young generation's perspective on Planetary Defense.

One aspect of human behaviour that recent events have shown is people's lack of response to seemingly distant or unlikely situations. Nonetheless, this action, or absence of action, results in inadequate planning and policies to deal with high-impact... Read More about Do Look Up: A young generation's perspective on Planetary Defense.

Short-Circuit Performance Investigation of 10kV+ Rated SiC n-IGBT (2022)
Presentation / Conference Contribution
Almpanis, I., Gammon, P., Mawby, P., Evans, P., Empringham, L., Lophitis, N., …Udrea, F. (2022). Short-Circuit Performance Investigation of 10kV+ Rated SiC n-IGBT. In IEEE Workshop on Wide Bandgap Power Devices and Applications in Europe (WiPDA-Europe). https://doi.org/10.1109/WiPDAEurope55971.2022.9936475

This paper presents a comprehensive short-circuit robustness investigation of 4H- Silicon Carbide (SiC) n-type Insulated Gate Bipolar Transistors (nIGBTs) for Medium-Voltage and High- Voltage applications. Numerical electrothermal TCAD simulations ev... Read More about Short-Circuit Performance Investigation of 10kV+ Rated SiC n-IGBT.

On the 3C-SiC/SiO 2 n-MOS interface and the creation of a calibrated model for the Electrons' Inversion Layer Mobility covering a wide range of operating temperatures and applied gate voltage (2022)
Presentation / Conference Contribution
Lophitis, N., Arvanitopoulos, A., Jennings, M. R., Mawby, P. A., & Antoniou, M. (2022). On the 3C-SiC/SiO 2 n-MOS interface and the creation of a calibrated model for the Electrons' Inversion Layer Mobility covering a wide range of operating temperatures and applied gate voltage. . https://doi.org/10.1109/WiPDAEurope55971.2022.9936319

Cubic (3C-) silicon carbide (SiC) metal oxide semiconductor (MOS) devices have the potential to achieve superior performance and reliability. The effective channel mobility can be significantly higher compared to other SiC polytypes due to the smalle... Read More about On the 3C-SiC/SiO 2 n-MOS interface and the creation of a calibrated model for the Electrons' Inversion Layer Mobility covering a wide range of operating temperatures and applied gate voltage.

The optimisation of a 15 kV 4H-silicon carbide integrated gate commutated thyristor (2022)
Presentation / Conference Contribution
Cao, Q., Gammon, P. M., Renz, A. B., Zhang, L., Baker, G., Antoniou, M., & Lophitis, N. (2022). The optimisation of a 15 kV 4H-silicon carbide integrated gate commutated thyristor. In 2022 IEEE Workshop on Wide Bandgap Power Devices and Applications in Europe (WiPDA Europe). https://doi.org/10.1109/WiPDAEurope55971.2022.9936508

A 15kV SiC thyristor is analysed, considering for the first time the design properties that will ensure the safe, stable operation of the device as an integrated gate commutated thyristor (IGCT), while also minimizing its on-state losses. Key to the... Read More about The optimisation of a 15 kV 4H-silicon carbide integrated gate commutated thyristor.

An experimentally driven assessment of the dynamic-on resistance in correlation to other performance indicators in commercial Gallium Nitride power devices (2022)
Presentation / Conference Contribution
Lophitis, N., Perkins, S., Arvanitopoulos, A., Faramehr, S., & Igic, P. (2022). An experimentally driven assessment of the dynamic-on resistance in correlation to other performance indicators in commercial Gallium Nitride power devices. In 2022 IEEE Workshop on Wide Bandgap Power Devices and Applications in Europe (WiPDA Europe). https://doi.org/10.1109/WiPDAEurope55971.2022.9936253

This work provides an experimentally driven performance comparison of commercial Gallium Nitride on Silicon (GaN-on-Si) power devices rated 600-650V at room and elevated temperatures with the focus being in assessing the on resistance (RON) increase... Read More about An experimentally driven assessment of the dynamic-on resistance in correlation to other performance indicators in commercial Gallium Nitride power devices.

An improved SiC-MOSFET model with focus on internal stray inductance and body diode stored charge for switching transients (2022)
Presentation / Conference Contribution
Radu, C., Li, K., Igic, P., Shepherd, S., Wörndle, A., van der Broeck, C. H., & Faramehr, S. (2022). An improved SiC-MOSFET model with focus on internal stray inductance and body diode stored charge for switching transients. In 2022 IEEE Workshop on Wide Bandgap Power Devices and Applications in Europe (WiPDA Europe) (1-6). https://doi.org/10.1109/WiPDAEurope55971.2022.9936259

Accurate switching transients modelling is important for SiC power converter layout optimisation. A SiC-MOSFET manufacturer model is used as a reference. Although the manufacturer model correctly represents device output and capacitance characteristi... Read More about An improved SiC-MOSFET model with focus on internal stray inductance and body diode stored charge for switching transients.

High Fidelity Cfd-Trained Machine Learning To Inform Rans-Modelled Interfacial Turbulence (2022)
Presentation / Conference Contribution
Bertolotti, L., Jefferson-Loveday, R., Ambrose, S., & Korsukova, E. (2022). High Fidelity Cfd-Trained Machine Learning To Inform Rans-Modelled Interfacial Turbulence. In Proceedings of Global Power and Propulsion Society. https://doi.org/10.33737/gpps22-tc-30

In aero-engine bearing chambers, two-phase shearing flows are difficult to predict as Computational Fluid Dynamics (CFD) RANS models tend to overestimate interfacial turbulence levels, leading to inaccuracies in the modelling of the flow. Turbulence... Read More about High Fidelity Cfd-Trained Machine Learning To Inform Rans-Modelled Interfacial Turbulence.

Alpha-cut based compositional representation of fuzzy sets and exploration of associated fuzzy set regression (2022)
Presentation / Conference Contribution
Pekaslan, D., & Wagner, C. (2022). Alpha-cut based compositional representation of fuzzy sets and exploration of associated fuzzy set regression. In IEEE World Congress on Computational Intelligence (IEEE WCCI2022). https://doi.org/10.1109/FUZZ-IEEE55066.2022.9882840

The compositional representation of data and associated statistical approaches is a powerful framework for modelling and reasoning about quantities which reflect proportions of a whole. Recently, an increasing body of work has started exploring the a... Read More about Alpha-cut based compositional representation of fuzzy sets and exploration of associated fuzzy set regression.

COUPLED EULERIAN THIN FILM MODEL AND LAGRANGIAN DISCRETE PHASE MODEL TO PREDICT FILM THICKNESS INSIDE AN AERO-ENGINE BEARING CHAMBER (2022)
Presentation / Conference Contribution
Mouvanal, S., Singh, K., Jefferson-Loveday, R., Ambrose, S., Eastwick, C., Johnson, K., & Jacobs, A. (2022). COUPLED EULERIAN THIN FILM MODEL AND LAGRANGIAN DISCRETE PHASE MODEL TO PREDICT FILM THICKNESS INSIDE AN AERO-ENGINE BEARING CHAMBER. In Proceedings of Global Power and Propulsion Society. https://doi.org/10.33737/gpps22-tc-68

In aero-engine bearing chambers, two-phase shearing flows are difficult to predict as Computational Fluid Dynamics (CFD) RANS models tend to overestimate interfacial turbulence levels, leading to inaccuracies in the modelling of the flow. Turbulence... Read More about COUPLED EULERIAN THIN FILM MODEL AND LAGRANGIAN DISCRETE PHASE MODEL TO PREDICT FILM THICKNESS INSIDE AN AERO-ENGINE BEARING CHAMBER.

Tunable Graphene-based Metasurfaces for Multi-Wideband 6G Communications (2022)
Presentation / Conference Contribution
Taghvaee, H., Pitilakis, A., Tsilipakos, O., Tasolamprou, A. C., Kantartzis, N. V., Kafesaki, M., …Gradoni, G. (2022). Tunable Graphene-based Metasurfaces for Multi-Wideband 6G Communications. In 2022 Sixteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) (X434-X436). https://doi.org/10.1109/metamaterials54993.2022.9920752

The next generation of wireless communications within the framework of 6G will be operational at the low THz frequency band. Although THz systems will dramatically enhance several performance indicators such as the data rate, spectral efficiency, and... Read More about Tunable Graphene-based Metasurfaces for Multi-Wideband 6G Communications.

Subwavelength Focusing with Reflective Metasurfaces Engineered Using the Concept of Perfect Lens (2022)
Presentation / Conference Contribution
Taghvaee, H., Liu, F., Diaz-Rubio, A., & Tretyakov, S. (2022). Subwavelength Focusing with Reflective Metasurfaces Engineered Using the Concept of Perfect Lens. In 2022 Sixteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) (X437-X439). https://doi.org/10.1109/Metamaterials54993.2022.9920820

It is highly desirable to break the diffraction limit on the resolution of optical devices and achieve subwavelength focusing. Despite numerous solutions that have been developed throughout the years, a practical method to obtain subwavelength focusi... Read More about Subwavelength Focusing with Reflective Metasurfaces Engineered Using the Concept of Perfect Lens.

Influence of Current Collapse due to Vds Bias Effect on GaN-HEMTs Id-Vds Characteristics in Saturation Region (2022)
Presentation / Conference Contribution
Lu, X., Videt, A., Li, K., Idir, N., & al., E. (2022). Influence of Current Collapse due to Vds Bias Effect on GaN-HEMTs Id-Vds Characteristics in Saturation Region.

A new method is proposed in this paper to investigate the influence of current collapse effect on the Id-Vds characteristics of GaN-HEMTs in high voltage region based on a modified H-bridge circuit. The measured Id-Vds characteristics with and witho... Read More about Influence of Current Collapse due to Vds Bias Effect on GaN-HEMTs Id-Vds Characteristics in Saturation Region.

Cooling System Sizing using LPTN Analysis and Multiphysics Modelling for an Axial Flux Machine and Integrated Drive (2022)
Presentation / Conference Contribution
Jeffrey, A. J., Connor, P. H., Vakil, G., Evans, P., Wheeler, P., & Hart, S. (2022). Cooling System Sizing using LPTN Analysis and Multiphysics Modelling for an Axial Flux Machine and Integrated Drive. . https://doi.org/10.1109/icem51905.2022.9910820

In this paper a Lumped Parameter Thermal Network (LPTN) is proposed for a Yokeless and Segmented Armature (YASA) axial flux permanent magnet (AFPM) machine. A simulation model is used to examine the machine in isolation, with an Integrated Motor Driv... Read More about Cooling System Sizing using LPTN Analysis and Multiphysics Modelling for an Axial Flux Machine and Integrated Drive.

Done in 60 minutes! Best practices, crowdsourcing, co-creation, and design principals of educational chatbots (2022)
Presentation / Conference Contribution
Henderson, J., Pears, M., & Konstantinidis, S. (2022, September). Done in 60 minutes! Best practices, crowdsourcing, co-creation, and design principals of educational chatbots. Presented at ALT Annual Conference 2022, Manchester, UK

Unlike banking, hospitality, and travel, the education sector is lacking in prolific and effective uses of chatbots for learning. Expert- and research- driven recommendations, online tools, and workshops for contemporary approaches are slim. This wor... Read More about Done in 60 minutes! Best practices, crowdsourcing, co-creation, and design principals of educational chatbots.

The journey from co-creation to impact for digital resources in healthcare (2022)
Presentation / Conference Contribution
Pears, M., Henderson, J., Wharrad, H., & KONSTANTINIDIS, S. (2022, September). The journey from co-creation to impact for digital resources in healthcare. Presented at ALT Annual Conference 2022, Manchester, UK

Co-creating digital resources in healthcare has many processes, pitfalls, and parameters. The development and transition from co-creation to impact requires effective knowledge exchange. This discussion panel will provide opportunity for attendees to... Read More about The journey from co-creation to impact for digital resources in healthcare.

Improving laser cladding productivity with ‘ABA’ cladding (2022)
Presentation / Conference Contribution
Koti, D., Powell, J., & Voisey, K. (2022). Improving laser cladding productivity with ‘ABA’ cladding. Procedia CIRP, 111, 205-209. https://doi.org/10.1016/j.procir.2022.08.048

Laser Cladding is one of several processes within Additive Manufacturing and usually involves the production of a clad surface by adding parallel, overlapping lines of clad material to the surface of a substrate. In this work a new laser cladding tec... Read More about Improving laser cladding productivity with ‘ABA’ cladding.

Concept and Preliminary Sizing of a Dual DC-Bus Homopolar Generator Using Diode Rectifiers (2022)
Presentation / Conference Contribution
Vannini, A., Papini, L., Marfoli, A., Gerada, C., & Bolognesi, P. (2022). Concept and Preliminary Sizing of a Dual DC-Bus Homopolar Generator Using Diode Rectifiers. In 2022 International Conference on Electrical Machines (ICEM) (2074-2080). https://doi.org/10.1109/icem51905.2022.9910897

Synchronous Homopolar Generators represent an attractive solution for the future of power generation in propulsive systems based on hybrid turbo-electric drivetrains. In fact they feature both a fully controllable excitation, similar to wound-field s... Read More about Concept and Preliminary Sizing of a Dual DC-Bus Homopolar Generator Using Diode Rectifiers.