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Search Results: 1 - 10 of 3765 matches for " Pavel Zuniga- Haro "
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Modeling of Multi-Pulse VSC Based SSSC and STATCOM  [PDF]
Pavel Zuniga- Haro, Juan Manuel Ramirez
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.23022
Abstract: The aim of this paper is to contribute to the dynamic modeling of multi-pulse voltage sourced converter based static synchronous series compensator and static synchronous compensator. Details about the internal functioning and topology connections are given in order to understand the multi-pulse converter. Using the 24 and 48-pulse topologies switching functions models are presented. The models correctly represent commutations of semiconductor devices in multi-pulse converters, which consequently allows a precise representation of harmonic components. Additionally, time domain models that represent harmonic components are derived based on the switching functions models. Switching functions, as well as time domain models are carried out in the original abc power system coordinates. Effectiveness and precision of the models are validated against simulations performed in Matlab/Simulink®. Additionally, in order to accomplish a more realistic comparison, a laboratory prototype set up is used to assess simulated waveforms.
International Monetary Transmission, a Factor-Augmented Vector Autoregressive (FAVAR) Approach: The Cases of Mexico and Brazil
MC Zuniga
Business and Economics Journal , 2011,
Abstract: This paper studies whether and how U.S. monetary shocks are transmitted to emerging economies utilizing as samples Mexico and Brazil. AFactor-Augmented Vector Autoregressive (FAVAR) methodology is employed to take advantage of the wide array of variables that can beincluded in this model to provide a more accurate picture of the transmission process. The results suggest that differences exist in thetransmission of foreign monetary shocks. This implies that no generalizations can be made even for countries of equal economic size and in thesame geographic region. When international transmission does exist, as it is in the case of Mexico, it induces large responses in severalmacroeconomic variables. Interest rate is the main channel of transmission, with some impact on the trade channel. Although littletransmission exists in the case of Brazil, it appears that this country slightly benefits from U.S. contractional monetary shocks. In the Braziliancase, the channel of transmission appears to be interest rates.
Equa??es de referência para o teste de caminhada de seis minutos em indivíduos saudáveis
Dourado, Victor Zuniga;
Arquivos Brasileiros de Cardiologia , 2011, DOI: 10.1590/S0066-782X2011005000024
Abstract: the six-minute walk test (6mwt) has been broadly used in clinical settings. several reference equations for prediction of the total distance walked during the test (6mwd) are available in literature. the present review aimed to critically discuss studies, published in portuguese and english (lilacs, scielo, medline, pubmed), which evaluated normal values and created reference equations for predicting 6mwd in healthy subjects, comparing them with the results that were recently obtained in brazilian individuals. age, sex, weight, height and body mass index were the main demographic and anthropometric features more often correlated with 6mwd. the equations derived from these characteristics were able to explain between 25 and 66% of the total variability in the 6mwd. unfortunately, the foreign equations were not applicable to the brazilian population. even when the 6mwt was performed following strict standardization, the difference in 6mwt performance between foreign and brazilian individuals remains, indicating the necessity of providing specific reference equations for each population and/or ethnic group. accordingly, these equations developed in brazil are probably the most appropriate for interpreting 6mwt performance in brazilian patients with chronic diseases affecting the exercise capacity. future studies are necessary with larger sample sizes (e.g. multicentric ones) and randomized design for the reference values of the 6mwd to be considered reliable.
A two end family of solutions for the Inhomogeneous Allen-Cahn equation in R^2
Oscar Agudelo,Andres Zuniga
Mathematics , 2013,
Abstract: In this work we construct a family of entire bounded solution for the singulary perturbed Inhomogeneous Allen-Cahn Equation $\ep^2\div\left(a(x)\nabla u\right)-a(x)F'(u)=0$ in $\R^2$, where $\ep\to 0$. The nodal set of these solutions is close to a "nondegenerate" curve which is asymptotically two non paralell straight lines. Here $F'$ is a double-well potential and $a$ is a smooth positive function. We also provide example of curves and functions $a$ where our result applies. This work is in connection with the results found by Z.Du and B.Lai, Z.Du and C.Gui, and F. Pacard and M. Ritore, in "Transition layers for an inhomogeneus Allen-Cahn equation in Riemannian Manifolds", "Interior layers for an inhomogeneous Allen-Cahn equation", "From the constant mean curvature hypersurfaces to the gradient theory of phase transitions" respectively, where they handle the compact case.
Ius et Praxis , 2003, DOI: 10.4067/S0718-00122003000100006
Abstract: under the provisions of the argentine constitution of 1853/60, the supreme court always maintained the doctrine of the supremacy of the constitution over international treaties, and the status of these as equal to congress' laws, until the court gave precedence to treaties on human rights over national laws in 1992. a fundamental change takes place in argentine law with the constitutional amendment of 1994: a) new rights and guarantees were received; b) by the provisions of article 75 subsection 22, ten treaties were given constitutional status, and treaties were granted precedence over national laws; c) article 75 subsection 24 authorizes the delegation of power and jurisdiction to supranational organizations under the provisions of integration treaties; d) the supreme court has accepted the jurisdiction of the inter-american court of human rights over the interpretation and application of the american convention and has declared that its own decisions must serve as guidelines for the interpretation of the conventions.
Lineamientos fundamentales de la reforma constitucional Argentina de 1994
Ricardo Haro
Pensamiento Constitucional , 1999,
Abstract: No contiene resumen
The semiclassical theory of quantized fields in classical electromagnetic backgrounds
J. Haro
Revista mexicana de física , 2004,
Abstract: Damos la formulación matemática del proceso de creación de pares de partículas sin spin en campos electromagnéticos. Calculamos la probabilidad de que se creen n pares en la aproximación semiclásica, y probamos, en esta aproximación, que la creación de pares es un proceso estocástico de Poisson. Finalmente, damos una demostración rigurosa y una interpretación correcta de la fórmula de Schwinger.
Estudio del número de pares creados por un campo eléctrico
J. Haro
Revista mexicana de física , 2004,
Abstract: En este trabajo estudiamos el numero de pares creados en un campo electrico usando la aproximacion semiclasica. Veremos que en la aproximacion semiclasica el proceso estocastico N(t)=′′numero de pares creados en el instante t′′, es un proceso estocastico de Poisson con esperanza (aE(t))/(64mc2), donde a′ es la constante de estructura fina y E(t) es la energ a del campo electrico en el instante t′.
Los Decretos de Necesidad y Urgencia en la Doctrina Judicial de la Corte Suprema de Justicia Argentina
Ricardo Haro
Ius et Praxis (En línea) , 2001,
La Razonabilidad y las Funciones de Control
Ricardo Haro
Ius et Praxis (En línea) , 2001,
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