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Posts tagged with networks

Michael Conover: Information Visualization for Large-Scale Data Workflows

  • data geometry
  • memes
  • visual analysis of program structure
  • visual analysis of propaganda
  • image
  • compare last week’s analysis and share with colleagues
  • geom_bin2d rather than geom_point(alpha=...) in ggplot2
  • ggpairs
  • automated grading: in addition to unit testing, 1) parse syntax trees of submissions, 2) define edit distance between them, 3) induces a network structure, 4) identify clusters, 5) give feedback to a representative member of the cluster and cc: everyone else




Birds appear to offer, in their behavior, neurophysiology, and neuroanatomy a striking case of parallel evolution of consciousness. Evidence of near human-like levels of consciousness has been most dramatically observed in African grey parrots. Mammalian and avian emotional networks and cognitive microcircuitries appear to be far more homologous than previously thought. Moreover, certain species of birds have been found to exhibit neural sleep patterns similar to those of mammals, including REM sleep and, as was demonstrated in zebra finches, neurophysiological patterns, previously thought to require a mammalian neocortex. Magpies in particular have been shown to exhibit striking similarities to humans, great apes, dolphins, and elephants in studies of mirror self-recognition.

Evidence that human and non-human animal emotional feelings arise from homologous subcortical brain networks provide compelling evidence for evolutionarily shared primal affective qualia.

“The absence of a neocortex does not appear to preclude an organism from experiencing affective states. Convergent evidence indicates that non-human animals have the neuroanatomical, neurochemical, and neurophysiological substrates of conscious states along with the capacity to exhibit intentional behaviors. Consequently, the weight of evidence indicates that humans are not unique in possessing the neurological substrates that generate consciousness. Non-human animals, including all mammals and birds, and many other creatures, including octopuses, also possess these neurological substrates.”

the Cambridge Declaration on Consciousness, 2012

hat tip to fibrations

(Source: fcmconference.org)




A tiny portion of Doug Hofstadter’s “semantic network”.
via jewcrew728, structure of entropy

hi-res




@IgorCarron blogs recent applications of compressive sensing and matrix factorisation every week.
(Compressive sensing solves underdetermined systems of equations, for example trying to fill in missing data, by L₁-norm minimisation.)
This week: reverse-engineering biochemical pathways and complex systems analysis.

@IgorCarron blogs recent applications of compressive sensing and matrix factorisation every week.

(Compressive sensing solves underdetermined systems of equations, for example trying to fill in missing data, by L₁-norm minimisation.)

This week: reverse-engineering biochemical pathways and complex systems analysis.




Local characteristic times are at least 1 millisecond, and the speed of propagation of the nervous influx is between 1 and 100 meters per second, so that times of O(100 milliseconds) are easily reached.