seismic inversion is a method that extracts acoustic impedance data from the seismic traces. sourcewavelets are band-limited, and thus seismic traces do not contain low and high frequency information.therefore, there is a serious problem when the deterministic seismic inversion is applied to real dataand the result of deterministic inversion is smooth. low frequency component is obtained from w...

Software-Defined Networks have seen an increasing in their deployment because they offer better network manageability compared to traditional networks. Despite their immense success and popularity, various security issues in SDN remain open problems for research. Particularly, the problem of securing the controllers in distributed environment is still short of any solutions. This paper proposes...

Reputation systems are very important in e-markets, where they help buyers to decide whether to purchase a product. Since a higher reputation often represents higher profit, malicious users may try to deceive them to increase their reputation. This may be aggravated through fear of retaliation to bad ratings or collusion of multiple users so that they can perform a fraud of high value before be...

Underlying recognition is an organization of ob jects and their parts into classes and hierarchies A rep resentation of parts for recognition requires that they be invariant to rigid transformations robust in the presence of occlusions stable with changes in viewing geometry and be arranged in a hierarchy These constraints are captured in a general framework using notions of a part line and a p...

1389-1286/$ see front matter 2012 Elsevier B.V. All rights reserved. http://dx.doi.org/10.1016/j.comnet.2012.12.001 ⇑ Corresponding author. Tel.: +55 32 2102 3311. E-mail addresses: [email protected] (A.B. Vieira), rafael.barra@ ice.ufjf.edu.br (R.B. de Almeida), [email protected] (J.M. de Almeida), [email protected] (S.V.A. Campos). 1 This statistic was extracted from an article enti...