This paper describes an a r t i f i c i a l t a c t i l e sense with multi-elements that not only takes the pressure i n f o r mation without crushing an object in the hand, but also discr iminates one pat tern from another on the surfaces being in touch therewi th . The eigenvalue of pat tern of stress d i s t r i b u t i o n on the surface of the receptor elements is derived from the lielmhol...

This article offers an extensive overview of competition indicators in the Portuguese economy in the period 2000-2009. The article covers qualitative competition indicators as well as classical profitability and concentration measures, focusing on the differences between tradable and nontradable sectors. The analysis carried out is distinct from that of competition authorities, aiming to set an...

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