109 citations
- Universidade Federal de PernambucoBR6 papers
- Universidade Federal da ParaíbaBR5 papers
- Universidade de São PauloBR3 papers
- University of LisbonPT3 papers
- Universidad Complutense de MadridES2 papers
- Universidad de Buenos AiresAR2 papers
- Universidade Federal do ParanáBR2 papers
- University of GroningenNL2 papers
- University of New MexicoUS2 papers
- Australian National UniversityAU1 paper
- Centre for Ultrahigh Bandwidth Devices for Optical SystemsAU1 paper
- Czech Academy of Sciences, Institute of Photonics and ElectronicsCZ1 paper
13 papers · 1 filter
On the higher-derivative Lorentz-breaking terms
T. Mariz, J. R. Nascimento, A. Yu. Petrov
The first one-loop higher-derivative contribution to the effective action of the Lorentz-breaking spinor QED is obtained and shown to be finite and ambiguous.
Interplay between spin frustration and thermal entanglement in the exactly solved Ising-Heisenberg tetrahedral chain
Onofre Rojas, Jozef Strecka, Marcelo L. Lyra
The spin-1/2 Ising-Heisenberg tetrahedral chain is exactly solved using its local gauge symmetry, which enables one to establish a rigorous mapping with the corresponding chain of…
On the Use of Lee's Protocol for Speckle-Reducing Techniques
Elsa E. Moschetti, M. Gabriela Palacio, Mery Picco +2
This paper presents two new MAP (Maximum a Posteriori) filters for speckle noise reduction and a Monte Carlo procedure for the assessment of their performance. In order to quantita…
Difference-frequency generation in nonlinear scattering of acoustic waves by a rigid sphere
Glauber T. Silva, Anderson Bandeira
In this paper, the partial-wave expansion method is applied to describe the difference-frequency pressure generated in a nonlinear scattering of two acoustic waves with an arbitrar…
Assessment of SAR Image Filtering using Adaptive Stack Filters
Maria E. Buemi, Marta Mejail, Julio Jacobo +2
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…
Polarimetric SAR Image Segmentation with B-Splines and a New Statistical Model
Alejandro C. Frery, Julio Jacobo-Berlles, Juliana Gambini +1
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…