Purpose: To evaluate a model of chronic renal ischemia in rats and to characterize the effects on renal tissue. Methods: 168 Wistar rats were divided into two equal groups, control (GC) and ischemia (GI). The animals of the GI (n=84) were submitted to partial ligation of the left renal artery, and the animals of GC (n=84) stayed with the renal artery intact. In seven successive and identical pe...

Ultra wideband (UWB) wireless communication has been the subject of extensive research in recent years due to its potential applications and unique capabilities. However, many important aspects of UWB-based communication systems have not yet been thoroughly examined. The area of narrow band communication is well developed. The objective of this paper is to present Ultra Wideband (UWB) communica...

Ultra-Wide Band (UWB) was presented as a promising radio technology. Because of their large bandwidth, UWB networks are supposed able to deliver high data rates at short ranges. But after analyzing measurements many works observed saturation of the number of channel Degrees of Freedom (DoF) versus bandwidth. This motivates the work presented in this paper where we focus on sub space behavior to...

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Johann Chiang

the concept of “ultra vires” has been studied in two specific areas: in company law and in discussions on the issues of capacity and acts of representatives. historically, in english law, ultra vires acts were considered as void, and neither representatives nor shareholders could approve them at a later time. subsequently, judges in common law system changed their approach from a restricted cap...