Energy consumption, income and CO2 emissions in Latin America

I describe and compare the environment policies of European Union and of 12 Latin Americans economies. For this, I use common statistical methods, such as non-parametric tests, convergence analysis (Beta and Sigma) and panel data, in order to verify the hypothesis that emissions and energy use in Latin America has been increasing since the mid-20th century. The statistical tests used confirm the proposed hypothesis. I also rely upon the Environmental Kuznets Curve- whereby economies that are at the growth stage are more focused on achieving the latter than they are on environmental concerns and those which have already achieved growth focus more on environmental concerns-to take an alternative approach by introducing the role of economic growth in the evolution of energy consumption and emissions. This chapter reaches the conclusion that energy consumption and pollutant emissions in LA, in per capita terms, are converging. This suggests that the initial levels of the variables help to explain why some countries have increased emissions (in this case, energy consumption) to a greater extent than other economies in the region. Evidence of convergence is also found, as well as a monotonic relationship between the level of pollution and the level of development (consistent with the Environmental Kuznets Curve).Energy Consumption, emissions, Latin America, Convergence

Seismic Spectral Monitoring of CO2 in a Geological Reservoir

Peak frequency is a spectral seismic attribute widely used for reservoir thickness estimation and hydrocarbon detection. In this work we apply this attribute in the context of the geological storage of carbon dioxide (CO2) and analyze its reliability as a thickness estimator for the gas accumulation. To model the vertical distribution of CO2, we solve the Buckley-Leverett equation with discontinuous flux function. A matrix reflectivity algorithm then computes, in the frequency domain, the seismic reflectivity. We find that the peak frequency variability due to CO2 saturation does not alter significantly its correlation with the accumulation thickness. We then extend the applicability of the spectral attribute by examining its time-lapse response to the evolution of the injected CO2 volume within a reservoir. We find that a description of the CO2-brine contact as well as the evaluation of the reservoir’s caprock sealing capacity can be obtained from this implementation. Peak-frequency time-lapse signatures when the CO2 forms an up-going front, evolves into a growing accumulation and leaks into the caprock are identified.Fil: Gómez, Julián Luis. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas. Departamento de Geofísica Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ravazzoli, Claudia Leonor. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas. Departamento de Geofísica Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Seismic reflectivity of a carbon dioxide flux

 In the context of the geological storage of carbon dioxide (CO2), thecharacterization of the injected CO2 in a reservoir is of primeimportance for volume capacity evaluation and long-term siteperformance. In this article, we aim to characterize a CO2 accumulationin a deep layered aquifer by means of its seismic reflectivity. Formodeling the vertical distribution of CO2 saturation in the reservoir,we solve the Buckley-Leverett equation with discontinuous flux function,which describes two-phase flow in porous stratified media. To solve thisequation numerically we employ a finite-difference relaxation scheme.The scheme entails an upwinding reconstruction for the spatialderivatives and an implicit-explicit Runge-Kutta scheme for timeintegrations. Once the vertical distribution of CO2 is obtained, we usea matrix propagator algorithm to compute in the frequency domain, thegeneralized reflectivity of the reservoir due to the injected gas. Thebehavior of this reflectivity controls the amplitude of seismic wavereflections and strongly conditions the detectability of the CO2 volumein the space-time domain. The numerical approach used in this article iseasy to implement and allows to quantify the reflectivity of the carbondioxide distribution in a practical way. We show that the frequencybehavior of the reservoir reflectivity may help to interpret thevertical accumulation of CO2, which can be useful as a basis fortime-lapse geophysical monitoring.Fil: Gómez, Julián Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Departamento de Geofísica Aplicada; ArgentinaFil: Ravazzoli, Claudia Leonor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Departamento de Geofísica Aplicada; Argentin

Alginate electrodeposition onto three-dimensional porous Co-Ni films as drug delivery platforms

Three-dimensional porous Co–Ni films/alginate hybrid materials have been successfully prepared by electrodeposition to be used as a steerable magnetic device for drug delivery. Firstly, 3D porous Co–Ni films were prepared as substrates for the subsequent electrodeposition of the alginate biopolymer. Cyclic voltammetry, galvanostatic and potentiostatic studies were performed to establish the best conditions to obtain porous Co–Ni films. The electrochemical experiments were carried out in an electrolyte containing the metal salts and ammonium chloride at low pHs. In a second stage, the electrochemical deposition of alginate as a biocompatible polymer drug delivery carrier was performed. The characteristics of the alginate matrix were investigated in terms of electrochemical properties, morphology and drug release. The hybrid material obtained showed soft-magnetic behavior and drug release indicating its suitability to be used as a steerable magnetic drug delivery device.Postprint (author's final draft

Traspaso de redes de aprendizaje a profesores que no participaron de su diseño

El presente trabajo tiene el propósito de dar cuenta de la aplicación de una red de aprendizaje configurada a partir de actividades de cálculo diferencial diseñadas por un grupo de profesores de nivel medio superior de Instituto Politécnico Nacional. La red de aprendizaje permite al docente tener material didáctico y al estudiante poner en juego el conocimiento previo con el nuevo al transitar de una representación a otra, para este estudio fue resuelta por profesores del área de matemáticas, física, química e inglés y a estudiantes

Personal selection processes seen from public and private visions

Se presenta una reflexión acerca de las prácticas del psicólogo organizacional y de su contribución a la construcción de la democracia desde una visión de lo público. Se señalan los cambios sociales y económicos que plantean retos y desafíos para la intervención en procesos de selección en los nuevos contextos organizacionales. Se busca develar lo implícito en la ideología de la organización y las racionalidades dominantes lo que facilita tomar opciones al asumir el rol de psicólogo en una organización. Se debate sobre las finalidades y funciones de los psicólogos organizacionales en la sociedad actual así como la corresponsabilidad y compromiso social y comunitario de esta disciplina.This paper introduces a reflection about organizational psychology practices and their contribution to democracy using a model based upon a public vision. We focus on the social and economical changes inside organizations and the challenges faced by personal selection proccesses in the new organizational context. The goal is to introduce the implicite organizational ideology and its dominant rationality in order to decide which role must be assumed by a professional in this field. The discussion turn around organizational psychologys functions and goals inside society, and the social and communal responsability of this discipline

Factores afectivos e identidad en el aprendizaje de la matemática escolar

En este trabajo se presentan los resultados parciales de una investigación longitudinal desde una perspectiva identitaria sociocultural y afectiva de los sujetos. Se busca comprender mejor los factores que afectan al rendimiento matemático en estudiantes de Secundaria (mujeres) en la ciudad de México. Mediante una metodología cualitativa y de estudio de casos se trata de establecer y describir relaciones significativas entre cognición-afecto y las interacciones sociales como posibles elementos constitutivos de las identidades sociales y culturales de las estudiantes en el aula de matemáticas. Los resultados del estudio ponen de manifiesto que las reacciones emocionales de las estudiantes dependen de las tareas matemáticas propuestas y de la dinámica de interacción que se establece entre pares y docentes. La identidad sociocultural de las estudiantes está fuertemente anclada al contexto sociocultural más amplio, algunas han interiorizado marcajes culturales que influyen en su autopercepción como estudiantes de matemáticas