Ultra Wide Band (UWB) communications offers a radically different approach to wireless communication compared to conventional narrow band systems. Global interest in the technology is huge. This white paper reports on the state of the art of UWB wireless technology and highlights key application areas, technological challenges, higher layer protocol issues, spectrum operating zones and future d...

This paper describes the measurement techniques of emissions from UWB devices discussed in ITU-R task group (TG) 1/8 to study the compatibility between ultra-wideband (UWB) devices and radiocommunication services. This paper also provides the background idea behind the measurement methods, as the final output of the discussion, i.e. ITU-R Recommendation, will not contain any citations to the re...

A solution of the compound in 5% methanolic potassium hydroxide remained colorless. Acknowledgment.-The authors are indebted to Mr. J. F. Alicino and his assistants for the microanalyses, and to Dr. Nettie Coy for the ultra-violet absorption data. Summary.-Diacetyl-7-ketojervine has been prepared by chromic acid oxidation of diacetyljervine. The ultra-violet absorption characteristics of this c...

A metric is introduced on the space of parameters (couplings) describing the large N limit of the O(N) model in Euclidean space. The geometry associated with this metric is analysed in the particular case of the infinite volume limit in 3 dimensions and it is shown that the Ricci curvature diverges at the infra-red (Gaussian) fixed point but is finite and tends to constant negative curvature at...

introduction: in the kindling-induced seizure model, low and repeated electrical or chemical stimulations, can elevate the neural network excitability and induce epileptiform seizures. opioid receptors are widely distributed in different areas of the brain. on the other hand, morphine has paradoxical effects and induces elevation or alleviation of the pain sensation and excitability, at differe...

introduction and objective: alport’s syndrome (hereditary nephritis with deafness) is a familial uncommon disease that ultra-structural studies are gold standard method of its diagnosis. materials and methods:we studied 26 iranian patients suspicious of alport’s syndrome by electron microscopy. we examined 19 men and 7 women (male to female ratio was 2.7) and the average age was 1.5 years (with...