Dr. D. J. Bell, Biochemical Laboratory, Cambridge, drew our attention in 1948 to a fructosan polysaccharide (levan) prepared from Italian rye grass. It is readily soluble in cold water, yields levulose on acid hydrolysis and is not metabolized. At that time, the fructosan was believed to be a homogeneous substance with a molecular weight somewhat greater than that of inulin, so that the suggest...

In order to use power splitter for communication and real world applications (e.g., telephony performances, antenna designs, wireless communications, digital communications, optical communications, CATV transmission systems, airborne systems), studying the nature and characteristics of the splitter is important. The purpose of this paper is to review and discuss various techniques aimed to deve...

sim i la tion for Op ti mizing Bound ary Con di tions in Ocean Models K. Kazantseva, E. Kazantsev, and M. A. Tolstykh d Universite Grenoble Alpes, Laboratoire Jean Kuntzmann, 51 rue des Mathematiques, Cam pus de Saint Mar tin d’Hères BP 53, Grenoble cedex 09, 38041 France INRIA, Laboratoire Jean Kuntzmann, 655 av e nue de l’Europes, Saint Ismier Cedex, 38334 France, e-mail: [email protected] In sti...

In this paper, we investigate the generalization of the Call-Put duality equality obtained in [1] for perpetual American options when the Call-Put payoff (y − x)+ is replaced by φ(x, y). It turns out that the duality still holds under monotonicity and concavity assumptions on φ. The specific analytical form of the Call-Put payoff only makes calculations easier but is not crucial unlike in the d...

– The combination of two techniques (Small Angle X-ray Scattering and Atomic Force Microscopy) has allowed us to measure in reciprocal and real space the correlation length ξ of salt-free aqueous solutions of highly charged hydrophobic polyelectrolyte as a function of the polymer concentration Cp, charge fraction f and chain length N . Contrary to the classical behaviour of hydrophilic polyelec...