Christiane Takacs

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Head-waving, a spontaneously occurring exploratory and appetitive behavior of the marine mollusc Aplysia, provides an opportunity to examine mechanisms of learning expressed in a nonreflexive behavior. The present study explores nonassociative and associative forms of learned modification of head-waving produced using an aversive stimulus as reinforcement.(More)
1. Abstract Given a set of points and their mutual similarities we want to find clusters of similar points and separate distant or dissimilar points. Spectral clustering methods (see [4], [13] for a survey) have in common that they use piecewise (almost) constant eigenvectors of matrices derived from the mutual distances or similarities of the points to be(More)
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