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Dissipation in Frequency Selective Structures

Dissipation in Frequency Selective Structures (FSS) of aperture/slot type is studied. The FSS consists of an arbitrary number of aperture layers and dielectric layers. An aperture layer consists of a conducting plate with a periodic array of apertures, with arbitrary cross-section. The dissipation in an FSS is due to losses in the dielectric material, and losses due to finite conductivity in the me

Attentional Control in the Asymmetry of Stroop-like pitch and colour paradigms

Two separate Stroop-like paradigms with multimodal auditory and visual stimuli were presented. The results revealed a paradigm asymmetry where auditory stimuli resulted in a Stroop-like effect in both paradigms meanwhile visual stimuli only resulted in a Stroop-like effect in the colour-paradigm. The conclusion involved discussing the Working Memory attention and visual and auditory perceptual str

A gap metric perspective of well-posedness for nonlinear feedback interconnections

A differential geometric approach based on the gap metric is taken to examine the uniqueness of solutions of the equations describing a feedback interconnection. It is shown that under sufficiently small perturbations on the Fréchet derivative of a nonlinear plant as measured by the gap metric, the uniqueness property is preserved if solutions exist given exogenous signals. The results developed r

An Industrial Dead-Time Compensating PI Controller

An industrial PI controller with dead-time compensation is presented. The advantage of the new controller compared with other dead-time compensating controllers is that it contains only three adjustable parameters; the gain, the integral time, and the dead time. The simple parametrization is obtained by calculating the process model needed for the dead-time compensation from the controller paramet