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Search Results: 1 - 10 of 6886 matches for " Julio Jacobo; "
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Mapa das mortes por violência
Waiselfisz, Julio Jacobo;
Estudos Avan?ados , 2007, DOI: 10.1590/S0103-40142007000300009
Abstract: as a continuation of the maps of violence series, the present study focuses on the situation of violent mortality - homicides and firearm-related deaths - in all 5.560 brazilian municipalities, using the sim's (mortality information subsystem of the ministry of health) database. due to possible temporal oscillations of small municipalities, the average of the number of incidents registered from 2002 to 2004 was used as an indicator. the evidences found in the study allowed us to notice that a spatial reconfiguration process of homicidal violence is taking place in the country: some municipalities arose with extremely high violence rates - higher than those of the capitals and metropolitan regions.
Polarimetric SAR Image Segmentation with B-Splines and a New Statistical Model
Alejandro C. Frery,Julio Jacobo-Berlles,Juliana Gambini,Marta Mejail
Computer Science , 2012, DOI: 10.1007/s11045-010-0113-4
Abstract: We present an approach for polarimetric Synthetic Aperture Radar (SAR) image region boundary detection based on the use of B-Spline active contours and a new model for polarimetric SAR data: the GHP distribution. In order to detect the boundary of a region, initial B-Spline curves are specified, either automatically or manually, and the proposed algorithm uses a deformable contours technique to find the boundary. In doing this, the parameters of the polarimetric GHP model for the data are estimated, in order to find the transition points between the region being segmented and the surrounding area. This is a local algorithm since it works only on the region to be segmented. Results of its performance are presented.
Assessment of SAR Image Filtering using Adaptive Stack Filters
Maria E. Buemi,Marta Mejail,Julio Jacobo,Alejandro C. Frery,Heitor S. Ramos
Computer Science , 2012, DOI: 10.1007/978-3-642-25085-9_10
Abstract: Stack filters are a special case of non-linear filters. They have a good performance for filtering images with different types of noise while preserving edges and details. A stack filter decomposes an input image into several binary images according to a set of thresholds. Each binary image is then filtered by a Boolean function, which characterizes the filter. Adaptive stack filters can be designed to be optimal; they are computed from a pair of images consisting of an ideal noiseless image and its noisy version. In this work we study the performance of adaptive stack filters when they are applied to Synthetic Aperture Radar (SAR) images. This is done by evaluating the quality of the filtered images through the use of suitable image quality indexes and by measuring the classification accuracy of the resulting images.
Jacobo Sefamí
Revista Chilena de Literatura , 2004,
Repaso primario y repaso secundario en una prueba de recuerdo libre
Jacobo Fevreiski
Revista Latinoamericana de Psicología , 1982,
Memoria e identidad en la literatura sefardí y mizrahi en Latinoamérica
Sefamí, Jacobo
Sefarad : Revista de Estudios Hebraicos y Sefardíes , 2002,
Abstract: This is the first article that attempts to trace a panoramic view of Sephardi/Mizrahi literature in Latin America. It starts by giving basic information about the migration of these Jewish groups at the end of the 19th and beginning of the 20th century. Later, it identifies more than twenty writers, and establishes two ways to approach Sephardi/- Mizrahi identity: 1) Reflection and study of the splendor of the Golden Age of Medieval Jewish culture in the Iberian Peninsula; and 2) representations of contemporary Sephardim and Mizrahim. Finally, the article proposes Isaac Chocrón's novel, Rómpase en caso de incendio, as the foundational text for contemporary Sephardi/- Mizrahi literature in Latin America. Este es el primer artículo que intenta trazar un panorama de la literatura sefardí/-mizrahi en América Latina. Tras una información básica sobre la migración de esos grupos judíos a finales del siglo XIX y principios del XX, se identifica a más de veinte escritores y se plantean dos modos de acercamiento a la identidad sefardí/mizrahi: 1) la reflexión y estudio del esplendor de la edad dorada de la cultura judía medieval; y 2) vivencias de los sefardíes y mizrahis contemporáneos. Finalmente, se considera la novela Rómpase en caso de incendio, de Isaac Chocrón, como el texto fundacional de la literatura sefardí/mizrahi contemporánea en América Latina.
The family index theorem and bifurcation of solutions of nonlinear elliptic bvp
Jacobo Pejsachowicz
Mathematics , 2011,
Abstract: We obtain some new bifurcation criteria for solutions of general boundary value problems for nonlinear elliptic systems of partial differential equations. The results are of different nature from the ones that can be obtained via the traditional Lyapunov-Schmidt reduction. Our sufficient conditions for bifurcation are derived from the Atiyah-Singer family index theorem and therefore they depend only on the coefficients of derivatives of leading order of the linearized differential operators. They are computed explicitly from the coefficients without the need of solving the linearized equations. Moreover, they are stable under lower order perturbations.
Bifurcation of Fredholm Maps I; The Index Bundle and Bifurcation
Jacobo Pejsachowicz
Mathematics , 2010,
Abstract: We associate to a parametrized family $f$ of nonlinear Fredholm maps possessing a trivial branch of zeroes an {\it index of bifurcation} $\beta(f)$ which provides an algebraic measure for the number of bifurcation points from the trivial branch. The index $\beta(f)$ is derived from the index bundle of the linearization of the family along the trivial branch by means of the generalized $J$-homomorphism. Using the Agranovich reduction and a cohomological form of the Atiyah-Singer family index theorem, due to Fedosov, we compute the bifurcation index of a multiparameter family of nonlinear elliptic boundary value problems from the principal symbol of the linearization along the trivial branch. In this way we obtain criteria for bifurcation of solutions of nonlinear elliptic equations which cannot be achieved using the classical Lyapunov-Schmidt method.
Bifurcation of Fredholm Maps II; The Dimension of the Set of Bifurcation Points
Jacobo Pejsachowicz
Mathematics , 2010,
Abstract: We obtain an estimate for the covering dimension of the set of bifurcation points for solutions of nonlinear elliptic boundary value problems from the principal symbol of the linearization of the problem along the trivial branch of solutions.
Una estimación de una ecuación gravitacional para los flujos bilaterales de manufacturas Mercosur-Unión Europea
Jacobo, Alejandro D.;
Economia Aplicada , 2010, DOI: 10.1590/S1413-80502010000100005
Abstract: this paper explores the determinants of mercosur-eu bilateral trade flows for 28 manufacturing sectors. in doing so, a gravity equation is estimated for 16 countries for the period 1991-2004. asexpected, the combined output of trade partners, the distance between them, their population and a number of other control variables seem to explain the bilateral trade flows of manufactures.
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