950 resultados para Vila do desemboque


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UANL

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Tesis (Doctor en Ciencias con Especialidad en Biotecnología) UANL, 2010.

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Tesis (Doctor en Ciencias Biológicas con Especialidad en Entomología) UANL, 2010.

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Tesis (Doctorado en Ciencias con Especialidad en Manejo de Recursos Naturales) UANL, 2013.

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Tesis (Doctor en Ciencias con Especialidad en Manejo de Recursos Sustentables) UANL, 2011.

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Tesis (Doctor en Filosofía con Orientación en Trabajo Social y Políticas Comparadas de Bienestar Social) UANL, 2012.

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This thesis follows and analyses the involvement of both social actors and the state in the industrial transformation of Mexico. While these actors have been key associates in the development of the Mexican economy for decades, with the 1982 debt crisis, and especially after the promotion of a structural reform in 1986, the patterns of their involvement changed. However, this change was more limited than expected, and the state did not abandon its participation in some key industrial sectors. This thesis will demonstrate that the role of the state remained important during the process of change towards an Export-Oriented developmental paradigm, although the state continued to participate in fashioning social relations, it did so in new ways that can be termed “protective liberalization.”

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Tesis (Doctorado en Filosofía con orientación en Psicología) UANL, 2014.

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An Ising-like model, with interactions ranging up to next-nearest-neighbor pairs, is used to simulate the process of interface alloying. Interactions are chosen to stabilize an intermediate "antiferromagnetic" ordered structure. The dynamics proceeds exclusively by atom-vacancy exchanges. In order to characterize the process, the time evolution of the width of the intermediate ordered region and the diffusion length is studied. Both lengths are found to follow a power-law evolution with exponents depending on the characteristic features of the model.

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In a recent paper [Phys. Rev. B 50, 3477 (1994)], P. Fratzl and O. Penrose present the results of the Monte Carlo simulation of the spinodal decomposition problem (phase separation) using the vacancy dynamics mechanism. They observe that the t1/3 growth regime is reached faster than when using the standard Kawasaki dynamics. In this Comment we provide a simple explanation for the phenomenon based on the role of interface diffusion, which they claim is irrelevant for the observed behavior.

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Experimental data from ultrasonic and inelastic neutron scattering measurements are analyzed for different families of Cu-based shape-memory alloys. It is shown that the transition occurs at a value, independent of composition and alloy family, of the ratio between the elastic constants associated with the two shears necessary to accomplish the lattice distortion from the bcc to the close-packed structure. The zone boundary frequency of the TA2[110] branch evaluated at the transition point (TM), weakly depends, for each family, on composition. A linear relationship between this frequency and the inverse of the elastic constant C', both quantities evaluated at TM, has been found, in agreement with the prediction of a Landau model proposed for martensitic transformations.