نتایج جستجو برای: several effects come to existence
تعداد نتایج: 11179869 فیلتر نتایج به سال:
It is proved that several usual methods of reduction for ordinary differential equations, that do not come from the Lie theory, are derived from the existence of C∞ -symmetries. This kind of symmetries is also applied to obtain two successive reductions of an equation that lacks Lie point symmetries but is a reduced equation of another one with a three dimensional Lie algebra of point symmetrie...
* Dept. of Economics and Policy Studies, 400 Decio Hall, University of Notre Dame, and Visiting Scholar, International Center for Advanced Studies, New York University. Please direct all correspondence to [email protected]. I should like to thank the audiences at CarnegieMellon, University of Stirling and the Universidad Republica de Montevideo, Uruguay, and more particularly, Matthias Klaes, D...
Recent fluorescence studies of DNA duplexes with simple repetitive base sequence have revealed important collective effects which are very sensitive to conformational disorder. In contrast to the monomeric chromophores, whose fluorescence lifetimes are shorter than 1 ps, the fluorescence decays of duplexes span several decades of time. The occurrence of excitation energy transfer, evidenced by ...
Performing optical spectroscopy of highly homogeneous quantum dot arrays in ultrahigh magnetic fields, an unprecedently well resolved Fock-Darwin spectrum is observed. The existence of up to four degenerate electronic shells is demonstrated where the magnetic field lifts the initial degeneracies, which reappear when levels with different angular momenta come into resonance. The resulting level ...
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