Leandro R. Almeida

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P Zielinsky, AL Piccoli Jr, JL Manica, LH Nicoloso, H Menezes, A Busato, MR Moraes, J Silva, L Bender, P Pizzato, L Aita, M Alievi, I Vian and L Almeida Fetal Cardiology Unit, IC/FUC, Porto Alegre, Brazil; Post-Graduation Program and Experimental Animal Laboratory, IC/FUC, Porto Alegre, Brazil; Veterinary School, Federal University of Rio Grande do(More)
The signature verification system is always the most sought after biometric verification system. Being a behavioral biometric trait which can be imitated, the researcher faces a challenge in designing such a system to counter intrapersonal and interpersonal variations. This papers presents DWT based Off-line Signature Verification using Angular Features(More)
In this paper we present a system for offline signature verification. The paperpsilas contributions are: i) Five distances were calculated and evaluated over the signature database, they are: furthest, nearest, template, central and n central. Also, a normalization procedure is established to turn each distance scale invariant; ii) These distances are(More)
In this work, we present the synthesis, characterization, and computational study of the supramolecular arrangement of a new cinnamic acid derivative: ethyl-(2E)-3-(4-hydroxy-3,5-dimethoxyphenyl)-prop-2-enoate (EHD). Single crystals of EHD were obtained using ethyl ether as solvent and a slow evaporation technique. Its crystallographic structure, derived(More)
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