We find that in a dispersion-managed fiber, in which the strength of the dispersion management is above some threshold, solitons can exist with normal average dispersion. When the normal average dispersion is below some limiting value there exist two soliton solutions with the same pulse duration and different pulse energies. When the normal average dispersion is above this limiting value, no s...

Abstract Background Prolonged P-wave duration and P-wave dispersion indicate interatrial conduction disturbance and early predict arrhythmia especially atrial fibrillation. Iron deposition in the atrial tissue might prolonged the atrial conduction time, and this study evaluated the P-wave prolongation and increased P-Wave dispersion in these patients. Materials and Methods Fifty patients w...

good dispersion of nano-particles in polymer matrices is a crucial parameter in determining the final properties of polymer nanocomposites. in this work, the distributions of cloisite 30b, cloisite 10a and cloisite 93a in ptmeg, popular polyols in the polyurethane manufacturing, were investigated in the nano, micro and macro scales. this investigation was carried out using x-ray diffraction, rh...

Fork-join and split-merge queueing systems are well-known abstractions of parallel systems in which each incoming task splits into subtasks that are processed by a set of parallel servers. A task exits the system when all of its subtasks have completed service. Two key metrics of interest in such systems are task response time and subtask dispersion. This paper presents a technique applicable t...

We analytically study received waveform asymmetries induced by chromatic dispersion (CD) for signed CD monitoring in differential quadrature phase-shift keying (DQPSK) systems and show that the asymmetries are results of differential detection and the ±π/4 phase shifters used in conventional DQPSK receivers. The theoretical insights developed help explain various published results on signed CD ...

This paper derives and analyzes continuous time random walk (CTRW) models in radial flow geometries for the quantification of non-local solute transport induced by heterogeneous flow distributions and by mobile-immobile mass transfer processes. To this end we derive a general CTRW framework in radial coordinates starting from the random walk equations for radial particle positions and times. Th...

Sammensatte ord skaper problemer ved ulike former for automatisk analyse av vokabularet i en tekst, f.eks, ved frekvensstudier. Problemet består i at menings­ innholdet i et sammensatt ord i mange tilfeller også kan beskrives i et uttrykk med de tilsvarende usammen­ satte ordene. I tekstsøking kan f.eks, de sammensatte ordene føre til at man ikke finner de dokumentene man søker etter fordi det ...

vanishes Note that index D M unlike the dimension of the ker nel and the dimension of the cokernel of D M is independent of the metric used in the construction of D M In fact according to the Atiyah Singer Index Theorem it is equal to a topological invariant A M the A genus ofM cf Ch III Thm We recall that A M is a characteristic number de ned by evaluating a certain polyno mial in the Pontrjag...