[PDF] Top 20 Braz. J. Phys. vol.39 número3

... 3 shows the relations between the effective indices of the fundamental mode and the second mode versus wave- length, and the relations between the effective indices of the modes in the i[r] ... See full document

... Based on the generalized uncertainty principle (GUP), in which the quantum gravitational effects are taken in to account, the corrected Beckenstein-Hawking entropy of the higher dimensio[r] ... See full document

... f ∗ gd~r, of quantum mechanics, because the Hamiltonian non-Hermitian operator of the intermediate electronic decay state is governed by complex potential. The function |.) is the right eigenvalues, and (.|function, the ... See full document

... where the curly brackets corresponds to the unperturbed non- twist Hamiltonian foreseeing two isochronous island chains. The other term, corresponds to a periodic perturbation act- ing discretely in time (the sum of ... See full document

... The capacitance and dielectric loss values for individual tran- sitions at different time intervals are noted at each crystalliza- tion temperature, and the corresponding data plotted ag[r] ... See full document

... In fact, using the one-dimensional spin-1 Heisenberg model with PBC as a test, White found that single-site DMRG method with the correction to the density-matrix, gets lower energy than [r] ... See full document

... In this paper, we put forward a modified perturbation approach to study the spin dynamics of a molecular magnet in the presence of time-dependent magnetic fields.The non-perturbed Hamilt[r] ... See full document

... In this study, electron paramagnetic resonance spectroscopy was used to investigate free radicals formed in gamma irradiated L-glutamine hydrochloride, iminodiacetic acid hydrochloride a[r] ... See full document

... This corresponds to a super- accelerated non-singular universe with a wormhole in which the conventional four-dimensional FRW flat spacetime is dominated by dust-like matter while the ex[r] ... See full document

... the difference between the fitting value and the observational data in each bin. Inserting the surface luminosity profile ob- tained from the best fit, as we can see in figure 1, in the auxil- iar expressions (16) we can ... See full document

... Angiogenesis is fundamental for living organisms in pro- cesses such as organ growth, reproduction and wound re- pair. It is characterized by in situ formation of blood ves- sels, thus permitting proliferation, ... See full document

... The different kind of treatments (cathodic, anodic and hy- brid) had a clear influence on the elastic modulus ( E ) of the stainless steel samples, as can be seen in figure 4b. Largest v[r] ... See full document

... In this paper, we analyze several proposed smooth quadratic autonomous 4- wing chaos systems and present a new 4-wing chaotic sys- tem whose number of linear and quadratic terms is less [r] ... See full document

... trochemical deposition technique using two electrodes sys- tem, and cconsidering its properties such as excellent elec- trical conduction, excellent optical transmission in the visi- ble[r] ... See full document

... [3] M.B. Tsang et al. (1997). Phy. Rev. C55, R557. [4] C. Williams et al. (1997). Phy. Rev. C55, R2132. [5] C. Beck et al. (1998). Eur. Phys. J. A2, 281. [6] T. Matsuse et al. (1997). Phy. Rev. C55, 1380. ... See full document

... In the previous section we presented the classical CVE where we applied the wavelet filtering to the vorticity field and subsequently reconstructed the corresponding velocity fields. Her[r] ... See full document

... These auxiliary states (the negative norm states) appear to be necessary for obtaining a fully covariant quantization of the free minimally coupled scalar field in de Sitter space- time,[r] ... See full document

... The important conclusions that emerge from the present work are the following. a) The triplet state correlation energy is negative which is to be expected since the anti-symmetric spatia[r] ... See full document

... Statistical mechanics constitutes one of the pillars of contemporary physics. Recognized as such — together with mechanics (classical, quantum, relativistic), electromagnetism and thermodynamics —, it is one of the ... See full document

... The in-plane electronic band structure near the zone edge K is Dirac-like for graphene, a mixture of linear and quadratic for bilayer graphene and multilayer graphene, and quadratic for [r] ... See full document