Renormalization Group Analysis of a Noisy Kuramoto-Sivashinsky Equation

We have analyzed the Kuramoto-Sivashinsky equation with a stochastic noise term through a dynamic renormalization group calculation. For a system in which the lattice spacing is smaller than the typical wavelength of the linear instability occurring in the system, the large-distance and long-time behavior of this equation is the same as for the Kardar-Parisi-Zhang equation in one and two spatial dimensions. For the $d=2$ case the agreement is only qualitative. On the other hand, when coarse-graining on larger scales the asymptotic flow depends on the initial values of the parameters.Comment: 8 pages, 5 figures, revte

Little-Parks effect and multiquanta vortices in a hybrid superconductor--ferromagnet system

Within the phenomenological Ginzburg-Landau theory we investigate the phase diagram of a thin superconducting film with ferromagnetic nanoparticles. We study the oscillatory dependence of the critical temperature on an external magnetic field similar to the Little-Parks effect and formation of multiquantum vortex structures. The structure of a superconducting state is studied both analytically and numerically.Comment: 7 pages, 1 figure. Submitted to J. Phys.: Condens. Mat

Impact of the Charge Transport in the Conduction Band on the Retention of Si-Nitride Based Memories

An improved model for charge injection through ONO gate stacks, that comprises carrier transport in the conduction band of the silicon nitride (Si3N4), is used to investigate the program/retention sequence of Si3N4 based (SONOS/TANOS) non volatile memories without making assumptions on the initial distribution of the trapped charge at the beginning of retention. We show that carrier transport in the Si3N4 layer impacts the spatial charge distribution and consequently several other aspects of the retention transient. The interpretation of the Arrehnius plots of the high temperature retention data, typically used to infer the trap depth from the retention activation energy is discussed. The model provides a simple explanation of the small threshold voltage increase observed during retention experiments of thick tunnel oxide ONO stacks

metodom spoljne fiksacije

Prelom dijafize tibije predstavlja jedan od naj~e-{}ih dijafizarnih preloma dugih kostiju. U radu su izneti rezultati le~enja 90 bolesnika sa nestabilnim zatvorenim prelomom dijafize tibije spoljnim fiksatorom Mitkovi}. Dominiraju osobe mu{kog pola i njih je bilo 66 (73%). Prose~na starost bolesnika iznosi 43,95 godina (15-82). U 15 (16,7%) bolesnika postignut je odli~an rezultat, u 38 (42,2%) dobar, u 24 (26,7%) zadovoljavaju}i, u 9 (10%) delimi~no zadovoljavaju}i i u 4 (4,4%) lo{. Kod 4 (4,4%) bolesnika do{lo je do formiranja pseudoartroze (uspe{no re{ene CD aparatom po Mitkovi}u i spongioplastikom). Ni u jednog ispitanika nije registrovan postoperativni osteitis. Spoljna fiksacija predstavlja metodu izbora u le~enju nestabilnih zatvorenih preloma dijafize tibije. Primeno