Ruth Schulz

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Several chemical substances belonging to classes of natural dietary origin display protective properties against some age-related diseases including neurodegenerative ones, particularly Alzheimer's disease (AD). These compounds, known as nutraceuticals, differ structurally, act therefore at different biochemical and metabolic levels and have shown different(More)
– RatSLAM is a biologically-inspired visual SLAM and navigation system that has been shown to be effective indoors and outdoors on real robots. The spatial representations at the core of RatSLAM, the pose cells, form in a distributed fashion as the robot learns the environment. The activity in the pose cells, while being coherent, does not possess strong(More)
We present a framework and first set of simulations for evolving a language for communicating about space. The framework comprises two components: (1) An established mobile robot platform, RatSLAM, which has a "brain" architecture based on rodent hippocampus with the ability to integrate visual and odometric cues to create internal maps of its environment.(More)
Evolutionary algorithms are playing an increasingly important role as search methods in cognitive science domains. In this study, methodological issues in the use of evolutionary algorithms were investigated via simulations in which procedures were systematically varied to modify the selection pressures on populations of evolving agents. Traditional(More)
The puzzle of the persistent question marks (a phrase coined by Harvey in 1993) refers to the occurrence of residual learnable alleles in simulations of the Baldwin effect, which concerns interactions between learning and evolution. Explanations of the puzzle have focused on the role of fitness proportional selection pressures and of drift. We replicated(More)
— The Lingodroids are a pair of mobile robots that evolve a language for places and relationships between places (based on distance and direction). Each robot in these studies has its own understanding of the layout of the world, based on its unique experiences and exploration of the environment. Despite having different internal representations of the(More)
(2015) Robot navigation using human cues: A robot navigation system for symbolic goal-directed exploration. Notice: Changes introduced as a result of publishing processes such as copy-editing and formatting may not be reflected in this document. For a definitive version of this work, please refer to the published source: Abstract— In this paper we present(More)