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From a universal design perspective, products should attract both people with disabilities and other persons. Design of chairs has decisive importance for activity and independence of users with physical disabilities. In an experimental study aiming at an easy chair with universal design qualities, six able-bodied young adults were asked to position a wide range of photo-represented chairs, includ
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Using Bloch waves to represent the full solution of Maxwell’s equations in periodic media, we study the limit where the material’s period becomes much smaller than the wavelength. It is seen that for steady-state fields, only a few of the Bloch waves contribute to the full solution. Effective material parameters can be explicitly represented in terms of dyadic products of the mean values of the non