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High-impedance surfaces are artificial surfaces synthesized from periodic structures. The high impedance is useful as it does not short circuit electric currents and reflects electric fields without phase shift. Here, a sum rule is presented that relates frequency intervals having high impedance with the thickness of the structure. The sum rule is used to derive physical bounds on the bandwidth fo
'Women in Literature': This paper was presented at a Symposium on 'The Image of Woman in Literature' held in Malmö and Lund, March 8-10, 2002. The Symposium was chaired by Henry Diab and Jalil Haidar.
The paper discusses the emergence and constitution of modernity as cultural and mental disposition with regard to notions like contingency, crisis, and critique. It refers to authors like Koselleck, Foucault, Makropoulos, Blumenberg, Musil.
A plane wave impinges on a laterally double-periodic inhomogeneous lossy dielectric structure. Using a wave splitting approach, and an expansion of the fields and permittivity in global and local basis functions, respectively, the scattered fields are determined via a propagator. The formulation is useful for a permittivity which varies abruptly as well as in a continuous fashion. A subdomain basis
Management scholars have long separated the study of opportunity creation and discovery, assuming that the nature of opportunities itself is not affected by information acquisition. Research on judgment and decision-making challenges this assumption, confirming that we judge the nature of opportunities in large part by the way we acquire information about it. Management theorists have yet to diges
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