Tsallis Information Measure, Multiresolution Analysis, and Nonlinear Dynamics

Projet PROMATHWe undertake the study of signals originated in time-dependent nonlinear systems by recourse to a wavelet based multiresolution analysis, as adapted to a non-extensive (Tsallis) scenario. Diverse applications are discussed that illustrate the fact that a Tsallis environment seems to provide one with more detailed information than the conventional Shannon one

Study of fast-ion-driven toroidal Alfvén eigenmodes impacting on the global confinement in TCV L-mode plasmas

Following recent observations of unstable Toroidal Alfvén Eigenmodes (TAEs) in a counter-current Neutral Beam Injection (NBI) scenario developed in TCV, an in-depth analysis of the impact of such modes on the global confinement and performance is carried out. The study shows experimental evidence of non-degradation of ion thermal confinement despite the increasing of auxiliary power. During such an improved confinement period, Toroidal Alfvén Eigenmodes (TAEs) driven by fast ions generated through Neutral Beam Injection (NBI) are found unstable. Together with the TAEs, various instabilities associated with the injection of the fast neutrals are observed by multiple diagnostics, and a first characterization is given. Nonlinear wave-wave couplings are also detected through multi-mode analysis, revealing a complex picture of the stability dynamics of the TCV scenario at hand. The measurements provided by a short-pulse reflectometer corroborate the identification and radial localization of the instabilities. A preliminary, but not conclusive, analysis of the impact of TAEs on the amplitude of the electron density fluctuations is carried out. Local flux-tube gyrokinetic simulations show that the dominant underlying instabilities in the absence of fast ions are Trapped Electron Modes (TEM), and that these modes are effectively suppressed by zonal flows. Attempts to simulate the simultaneous presence of fast-ion driven TAEs and TEM turbulence show that elongated streamers develop up to the full radial extent of the flux-tube domain, thereby invalidating the local assumption and indicating that a global approach is mandatory in these TCV plasmas

Processed data_Processing and microstructural characterization of metallic powders produced from chips of AA2024 alloy

Processed data for AA2024 powder alloy

Processing and microstructural characterization of metallic powders produced from chips of AA2024 alloy

Data is related to the research on processing and microstructural characterization of metallic powders produced from chips of AA2024 alloy. DSC data show results of DSC studies of AA2024 alloy. XRD data shows diffractograms for four milling regimes and initial chips. SLS method helped to estimate powder size for the milled powders and to get statistically valued results

Characterization of Superplastic Deformation Behavior for a Novel Al-Mg-Fe-Ni-Zr-Sc Alloy: Arrhenius-Based Modeling and Artificial Neural Network Approach

The application of superplastic forming for complex components manufacturing is attractive for automotive and aircraft industries and has been of great interest in recent years. The current analytical modeling theories are far from perfect in this area, and the results deduced from it characterize the forming conditions insufficiently well; therefore, successful numerical modeling is essential. In this study, the superplastic behavior of the novel Al-Mg-Fe-Ni-Zr-Sc alloy with high-strain-rate superplasticity was modeled. An Arrhenius-type constitutive hyperbolic-sine equation model (ACE) and an artificial neural network (ANN) were developed. A comparative study between the constructed models was performed based on statistical errors. A cross validation approach was utilized to evaluate the predictability of the developed models. The results revealed that the ACE and ANN models demonstrated strong workability in predicting the investigated alloy’s flow stress, whereas the ACE approach exhibited better predictability than the ANN

Sociedad y territorio en el conurbano bonaerense : un estudio de las condiciones socioeconómicas y sociopolíticas de cuatro partidos: San Miguel, José C. Paz, Moreno y Morón

El presente libro resume los principales resultados del proyecto de investigación "Escalas del desarrollo en la Región Metropolitana de Buenos Aires", recientemente llevado a cabo en el Instituto del Conurbano de la Universidad de General Sarmiento. El propósito de este estudio fue profundizar en el conocimiento de las dinámicas sociales y políticas que pueden sostener procesos de desarrollo en el conurbano bonaerense concentrando el foco en cuatro partidos: San Miguel, José C. Paz, Moreno y Morón. Se analizaron en profundidad dos campos problemáticos: las condiciones socioeconómicas y los procesos sociopolíticos, con el supuesto de que estos dos planos de la vida social permiten comprender buena parte de la dinámica socioterritorial de los municipios considerados. Así, los trabajos que componen este volumen se detienen en algunas problemáticas específicas, como las condiciones de vida y las formas de movilidad de la población, las interacciones entre el Estado y la sociedad civil, los modelos de gestión pública y las modalidades de implementación de programas sociales en los partidos de la región

Aprender haciendo con otros : una experiencia de formación universitaria en articulación con organizaciones sociales

Este libro presenta la sistematización de una experiencia pedagógica basada en la vinculación entre la Universidad Nacional de General Sarmiento (UNGS) y organizaciones sociales de la Región Metropolitana de Buenos Aires que se desarrolla desde el año 2005. El caso en cuestión muestra la posibilidad -y la fecundidad- de la articulación entre docencia, investigación e intervención en la comunidad, una de las preocupaciones orientadoras de la UNGS. Esta articulación es el sustento de uno de los aportes que se pueden realizar desde las universidades al desarrollo territorial y a la ampliación democrática en sus diferentes aspectos económicos, culturales, ambientales y políticos