Luiz Landau

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This work presents a self-consistent algorithm for near real-time rainfall estimation via infrared Geostationary Operational Environmental Satellite (GOES) (each ½ hour) data based on a validation simultaneous dataset from Precipitation Radar (PR) onboard the Tropical Rainfall Measuring Mission (TRMM) satellite, GOES and lightning data, for the basin of(More)
RADARSAT-1 images were used as an attempt to identify seepage slicks in the Foz do Amazonas Basin, one of the most promising oil and gas exploration frontiers in the Brazilian Equatorial margin, a region cloud-covered most of the year. An unsupervised semivariogram textural classifier algorithm was used to enhance areas of smooth texture and low radar(More)
Edge-based data structures are used to improve computational efficiency of Inexact Newton methods for solving finite element nonlinear solid mechanics problems on unstructured meshes. Edge-based data structures are employed to store the stiffness matrix coefficients and to compute sparse matrix-vector products needed in the inner iterative driver of the(More)
This study focuses on improving information about oil spill environmental sensitivity in Western Amazonia, Brazil, by incorporating: (1) results of semivariogram textural classification (USTC) of dual season SAR image mosaics of the Global Rain Forest Mapping (GRFM) project in order to identify flooded forest and flooded vegetation; these cover types(More)
An important task in seismic data processing is the identification and subsequent suppression of multiple reflections so as to avoid false interpretations about the true subsurface characteristics. A strategy for the prediction and elimination/attenuation of ocean-bottom multiple energy on synthetic marine seismic data is exploited. The methodology proposed(More)
New challenges and demands on software engineering education are presented by rapid changes and increased complexity of software systems. This paper presents the VisAr3D environment that has been developed as an innovative proposal to be introduced in the classroom to provide a 3D visualization of UML models. The user is invited to intuitively understand(More)
This study was designed to verify the evidence of validity, through: 1) literature review about ushiro-ukemi pedagogical progression. 2) An expert performed the movement and it was recorded to develop the animation. 3) Finally, an evaluation of 3D character animations processes by other experts' opinions. 13 experts have evaluated three affirmatives through(More)
The prime objective of the present research is to understand and contextualize, from a tectonic and structural standpoint, the results obtained by an interferometric study recently carried out in the Manaus area, Amazonas State, Brazil in which a stack of archived RADARSAT-1 data has been processed. The research question has been approached through the(More)