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Minas Gerais, Brazil

Matos C.C.,University of Ouro Preto | De Assis A.M.,University of Minas Gerais | Quites L.V.,University of Minas Gerais | Matos D.C.,Minas Gerais State University
Work | Year: 2012

The aim of this paper is to analyze the importance and applicability of ARMflex® in the odontological area and its influence in preventing or stopping the involuntary habit of improperly positioning the hand under the face or under the pillow. The ergonomic usage of ARMflex® influences the design in odontological areas and innovates in the semi-immobilization of the patient to prevent future orthodontic problems. © 2012 - IOS Press and the authors. All rights reserved.

Wu C.,CAS Shanghai Institute of Applied Physics | Qian W.-L.,University of Ouro Preto | Qian W.-L.,University of Sao Paulo | Ma Y.-G.,CAS Shanghai Institute of Applied Physics | Yang J.-F.,East China Normal University
International Journal of Modern Physics E | Year: 2013

Relativistic mean-field theory with parameter sets FSUGold and IU-FSU is extended to study the properties of neutron star matter in β equilibrium by including Kaon condensation. The mixed phase of normal baryons and Kaon condensation cannot exist in neutron star matter for the FSUGold model and the IU-FSU model. In addition, it is found that when the optical potential of the K- in normal nuclear matter UK ≥ -100 MeV, the Kaon condensation phase is absent in the inner cores of the neutron stars. © 2013 World Scientific Publishing Company.

Wu C.,CAS Shanghai Institute of Applied Physics | Qian W.-L.,University of Ouro Preto | Ma Y.-G.,CAS Shanghai Institute of Applied Physics | Zhang G.-Q.,CAS Shanghai Institute of Applied Physics | Kumar S.,CAS Shanghai Institute of Applied Physics
EPL | Year: 2012

The improved quark mass density-dependent (IQMDD) model, which has been successfully used to describe the properties of both infinite nuclear matter and finite nuclei, is applied to investigate the properties of quark deconfinement phase transition. By using the finite temperature quantum field theory, we calculate the finite temperature effective potential and extend the IQMDD model to finite temperature and finite nuclear matter density. The critical temperature and the critical density of nuclear matter are given and the QCD phase diagram is addressed. It is shown that this model can not only describe the saturation properties of nuclear matter, but also explain the quark deconfinement phase transition successfully. © Europhysics Letters Association 2012.

Cury A.,University of Ouro Preto | Cremona C.,Technical Center for Bridge Engineering
Mechanical Systems and Signal Processing | Year: 2012

For reliable performance of vibration-based damage detection algorithms, it is important to distinguish abnormal changes in modal parameters caused by structural damage from normal changes due to environmental fluctuations. This paper firstly addresses the modeling of temperature effects on modal frequencies of a PSC box girder bridge located on the A1 motorway in France. Based on a six-month monitoring experimental program, modal frequencies of the first seven mode shapes and temperatures have been measured at three hour intervals. Neural networks are then introduced to formulate regression models for quantifying the effect of temperature on modal parameters (frequencies and mode shapes). In 2009, this bridge underwent a strengthening procedure. In order to assess the effect of strengthening on the vibration characteristics of the bridge, modal properties had to be corrected from temperature influence. Thus, the first goal is to assess the changes on the vibration signature of this bridge induced by the strengthening. For this purpose, classical statistical analysis and clustering methods are applied to the data recorded over the period after strengthening. The second goal is to evaluate the influence of temperature effects on the clustering results. It comes that the temperature correction significantly improves the confidence in the novelty detection and in the strengthening efficiency. © 2012 Elsevier Ltd.

Wu C.,CAS Shanghai Institute of Applied Physics | Ma Y.-G.,CAS Shanghai Institute of Applied Physics | Kumar S.,CAS Shanghai Institute of Applied Physics | Cao X.-G.,CAS Shanghai Institute of Applied Physics | Qian W.-L.,University of Ouro Preto
Physical Review C - Nuclear Physics | Year: 2012

In this work, we study the quark energy spectrum in an MIT bag using the quark-meson coupling model. In particular, thermal distribution functions of quarks at finite temperature are explicitly incorporated into the calculations. It is found that when temperature is less than 50 MeV, the probability for a quark to occupy an exciting state is very rare and negligible, therefore the corresponding contributions to the thermodynamic potential under mean-field theory are strongly suppressed. In this context, if one calculates other physical quantities derived from thermodynamic potential, effects due to quark distribution functions are also likely to be unimportant. © 2012 American Physical Society.

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