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CSR
2010
Springer
15 years 5 months ago
Sofic and Almost of Finite Type Tree-Shifts
We introduce the notion of sofic tree-shifts which corresponds to symbolic dynamical systems of infinite trees accepted by finite tree automata. We show that, contrary to shifts of...
Nathalie Aubrun, Marie-Pierre Béal
132
Voted
ENTCS
2007
92views more  ENTCS 2007»
15 years 2 months ago
A Duality in Proof Systems for Recursive Type Equality and for Bisimulation Equivalence on Cyclic Term Graphs
This paper is concerned with a proof-theoretic observation about two kinds of proof systems for regular cyclic objects. It is presented for the case of two formal systems that are...
Clemens Grabmayer
BIOID
2008
190views Biometrics» more  BIOID 2008»
15 years 4 months ago
Direct Attacks Using Fake Images in Iris Verification
Abstract. In this contribution, the vulnerabilities of iris-based recognition systems to direct attacks are studied. A database of fake iris images has been created from real iris ...
Virginia Ruiz-Albacete, Pedro Tome-Gonzalez, Ferna...
EJC
2011
14 years 9 months ago
Enumeration of connected Catalan objects by type
Noncrossing set partitions, nonnesting set partitions, Dyck paths, and rooted plane trees are four classes of Catalan objects which carry a notion of type. There exists a product f...
Brendon Rhoades
GLVLSI
2003
IEEE
166views VLSI» more  GLVLSI 2003»
15 years 7 months ago
Exponential split accumulator for high-speed reduced area low-power direct digital frequency synthesizers
A new split accumulator architecture to be used in direct digital frequency synthesizers (DDFS) systems is presented. This new design eliminates the need of adders on the section ...
Edward Merlo, Kwang-Hyun Baek, Myung-Jun Choe