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The transport of energy in H-bonded chains is really an extremely important problem, because of its close connection with basic phenomena in biological systems. We consider a lattice model which is made of two one-dimensional harmonically coupled sublattices corresponding to the oxygens and protons, the two sublattices being coupled. The study becomes more interesting when we introduce the dipole-dipole...
In next generation systems and networks, the incorporation of mechanisms achieving robust, predictable and self-adaptive behavior with minimum cost will be a key requirement. Towards this goal we introduce the notion of the "self-growing network". The latter, in its initial deployment stage, is limited to a single dedicated purpose (energy-efficient networking, spectrum efficient communications,...
This paper describes development of cognitive self-managed networks according to the vision of the Future Internet networks being developed in the Self-NET project. The project develops and prototypes architecture and solutions for realising a vision on Internet evolution based on integration of cognition and autonomics in self-managed networks demonstrated in numerous and diverse use-cases developed...
In its 5th decade, the Internet's future evolution is hampered by the increasing complexity and sophistication of the processes managing its infrastructure. Management costs require a technically skilled human intellect, amounting to a substantial part of total cost of ownership. Self-management is positioned as a key capacity towards a scalable future Internet architecture. Herein we present key...
In coherent optical systems, apart from fiber chromatic dispersion and polarization mode dispersion, transmitter and local oscillator phase noise and intermediate frequency offset also have a significant impact on the systempsilas performance. We study, by simulation, the performance of adaptive equalization, assisted by a recursive phase noise-removing unit, on the combined impact of the above effects...
Fiber-optic communication systems using phase shift keying (PSK) modulation may suffer from nonlinear phase noise. In this paper, an asymptotic approximation of the probability density function (p.d.f.) of the normalized nonlinear phase noise is derived by taking the inverse Laplace transform of its moment generating function and using the method of steepest descent. For comparison, the inverse Laplace...
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