Hybrid Dorsal Preservation Rhinoplasty: How We Do It

Background: A difficult to correct dorsal K-area is a frequent cause of residual and/or recurrent dorsal hump in preservation rhinoplasty. Fragile osseocartilaginous elastic connections essential in static stability of nasal pyramid structure should be at least respected. A bulging of Upper Lateral Cartilage (ULC) caudally to this area are principal cause of cartilaginous hump, difficult to correct without damaging the stability. Aim: A hybrid method of a combination of structural surgery with preservation attitude was suggested. Methods and Material: Osseocartilaginous interconnection of DKA area (Dorsal K-Area) can be totally preserved with structural correction of the same area. An incision below of DKA interconnections, with high auto-spreader grafts instead of trimming the deformity was suggested. Conclusion: Septal T-segment could be freely excised as needed, sutured with high and low autospreader graft, as well with septum in desired position, without jeopardizing static stability of nasal pyramid. In our patients, no residual and/or recurrent hump was registered in immediate and as well in long term resultsinfo:eu-repo/semantics/publishedVersio

Chaos and Synchronized Chaos in an Earthquake Model

We show that chaos is present in the symmetric two-block Burridge-Knopoff model for earthquakes. This is in contrast with previous numerical studies, but in agreement with experimental results. In this system, we have found a rich dynamical behavior with an unusual route to chaos. In the three-block system, we see the appearance of synchronized chaos, showing that this concept can have potential applications in the field of seismology.Comment: To appear in Physical Review Letters (13 pages, 6 figures

Exponential Distributions in a Mechanical Model for Earthquakes

We study statistical distributions in a mechanical model for an earthquake fault introduced by Burridge and Knopoff [R. Burridge and L. Knopoff, {\sl Bull. Seismol. Soc. Am.} {\bf 57}, 341 (1967)]. Our investigations on the size (moment), time duration and number of blocks involved in an event show that exponential distributions are found in a given range of the paramenter space. This occurs when the two kinds of springs present in the model have the same, or approximately the same, value for the elastic constants. Exponential distributions have also been seen recently in an experimental system to model earthquake-like dynamics [M. A. Rubio and J. Galeano, {\sl Phys. Rev. E} {\bf 50}, 1000 (1994)].Comment: 11 pages, uuencoded (submitted to Phys. Rev. E

Anomalous Hall effect in superconductors with spin-orbit interaction

We calculate the anomalous Hall conductance of superconductors with spin-orbit interaction and with either uniform or local magnetization. In the first case we consider a uniform ferromagnetic ordering in a spin triplet superconductor, while in the second case we consider a conventional s-wave spin singlet superconductor with a magnetic impurity (or a diluted set of magnetic impurities). In the latter case we show that the anomalous Hall conductance can be used to track the quantum phase transition, that occurs when the spin coupling between the impurity and electronic spin density exceeds a certain critical value. In both cases we find that for large spin-orbit coupling the superconductivity is destroyed and the Hall conductance oscillates strongly.Comment: 10 pages, 6 figure

Repetibilidade de caracteres fenotípicos em populações de cenoura.

O objetivo do trabalho foi utilizar diferentes estimativas de repetibilidade para caracteres fenotipicos em duas populações de cenoura, visando identificar a melhor metodologia de estimação de repetibilidade e o grau de estabilização das populações.bitstream/item/73867/1/bpd-88.pd

Caracterização e dissimilaridade entre populações de cenoura.

Verificou-se a efetividade de caracteres fenotipicos na caracterização e dissimilaridade, bem como a distânica genética entre populações melhoradas e cultivares de cenoura

Estudo por polarografia da interação quitosana e atrazina.

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Accurate mass measurements of 26^{26}Ne, 26−30^{26-30}Na, 29−33^{29-33}Mg performed with the {\sc Mistral} spectrometer

The minuteness of the nuclear binding energy requires that mass measurements be highly precise and accurate. Here we report on new measurements $^{29-33}$Mg and $^{26}$Na performed with the {\sc Mistral} mass spectrometer at {\sc Cern}'s {\sc Isolde} facility. Since mass measurements are prone to systematic errors, considerable effort has been devoted to their evaluation and elimination in order to achieve accuracy and not only precision. We have therefore conducted a campaign of measurements for calibration and error evaluation. As a result, we now have a satisfactory description of the {\sc Mistral} calibration laws and error budget. We have applied our new understanding to previous measurements of $^{26}$Ne, $^{26-30}$Na and $^{29,32}$Mg for which re-evaluated values are reported.Comment: submitted to Nuclear Physics