Mark A. C. Summers

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Acknowledgements The authors would like to acknowledge the support of the UK Joint Information Systems Committee (JISC) in the development of the modelling approach underpinning this study, and the SURFfoundation for enabling its application in the Netherlands. • The Netherlands team included Jos de Jonge and Marcia van Oploo of EIM/Research voor Beleid in(More)
of the local reference node concept coupled with steady-state and transient analyses using state variables allows the incorporation of unrestrained EM modeling of microwave structures in a circuit simulator. A strategy implementing global modeling of electrically large microwave systems using the circuit abstraction is presented. This is applied to the(More)
SUMMERS, MARK ALAN. Simulation of a Quasi-Optical Grid Amplifier. (Under the direction of Michael B. Steer.) An integrated electromagnetic and circuit simulation environment is developed for the simulation of spatial power combining systems. The analysis incorporates surface modes and full nonlinear effects. The simulation environment includes a full-wave(More)
Development of a computer aided engineering environment that supports the design of spatial power combining systems is proposed. A complete integrated thermal/electromagnetic/circuit simulation capability using a mix of commercially available tools from various vendors will be compatible to the new tools being developed for spatial power combining systems.(More)
We investigate the growth of periodically aligned silicon microstructures for the fabrication of square spiral photonic crystals using the glancing angle deposition phi-sweep process. We report the optimization of the phi-sweep offset angle for fabrication of microstructures with more precise geometry. The effects of varying the sweep offset angle of the(More)
A new interferometer-based optical sensing platform with nanostructured thin films of ZrO2 or TiO2 as sensing environment has been developed. With the application of an IC compatible Si(3)N(4) waveguide technology, Mach-Zehnder interferometer devices have been fabricated. The application of the glancing angle deposition technique allowed fabrication of(More)
BACKGROUND Generalized anxiety disorder (GAD) is a common and highly comorbid anxiety disorder characterized by repetitive negative thinking (RNT). Treatment trials tend to exclude individuals with non-primary GAD, despite this being a common presentation in real world clinics. RNT is also associated with multiple emotional disorders, suggesting that it(More)
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