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Modes of propagation of electromagnetic pulses in closed cylindric bi-isotropic waveguides

Modes of propagation of electromagnetic pulses in closed, cylindric waveguides with bi-isotropic fillings are analyzed systematically using complex, time-varying electromagnetic fields. The emphasis is on the circular bi-isotropic waveguide and the bi-isotropic parallel-plate waveguide. For both geometries, seven Volterra integral equations of the second kind, which are to be solved simultaneously f

Do some cases of anorexia nervosa reflect underlying autistic-like conditions?

In a sample of 51 teenagers with anorexia nervosa (AN)-which included 24 cases constituting the total population of AN cases born in 1970-several had shown social, communicative and behaviour patterns suggestive of autistic-like conditions as children, long before the onset of AN. One of the three boys in the AN group had Asperger syndrome. Three of the 48 girls had histories suggesting high funct

The Best Swimmers Drown – Mechanisms and Epistemic Risks: A constructive critique of Elster

According to Jon Elster, mechanisms are frequently occurring and easily recognizable causal patterns that are triggered under generally unknown conditions or with indeterminate consequences. In the absence of laws, moreover, mechanisms provide explanations. In this paper I argue that Elster’s view has difficulties with progressing knowledge. Normally, filling in the causal picture without revising