Category: Complexity
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On principles of emergent organization
Adam Rupe, James P. Crutchfield published “On principles of emergent organization“: After more than a century of concerted effort, physics still lacks basic principles of spontaneous self-organization. To appreciate why, we first state the problem, outline historical approaches, and survey the present state of the physics of self-organization. This frames the particular challenges arising from mathematical intractability and…
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energetic cost of allostasis and allostatic load – do not stress
Chronic psychosocial stress increases disease risk and mortality, but the underlying mechanisms remain largely unclear. This article in Psychoneuroendocrinology outlines an energy-based model for the transduction of chronic stress into disease over time. The energetic model of allostatic load (EMAL) emphasizes the energetic cost of allostasis and allostatic load, where the “load” is the additional…
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Andy Clark “How the brain shapes reality”
Philosopher and cognitive scientist Andy Clark challenges our conventional understanding of the mind’s interaction with the world. A great and entertaining lecture. I like the reflection with the reference to the weather forecast and how the forecast impacts “reality” perception. At the very least, understanding all those prediction-driven, precision-inflected, looping influences should bring us a…
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Why the simplest explanation isn’t always the best
Eva L. Dyer and Konrad Kording discuss in a commentary article “Why the simplest explanation isn’t always the best” an essential learning related to the article Phantom oscillations in principal component analysis (also available on BioRXiv) Dimensionality reduction simplifies high-dimensional data into a small number of representative patterns. One dimensionality reduction method, principal component analysis (PCA), often selects oscillatory…
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42 and 5
Today, 42 years ago, we had the great pleasure of discovering the reality of 5-fold crystals. On the morning of 8 April 1982, an image counter to the laws of nature appeared in Dan Shechtman’s electron microscope. In all solid matter, atoms were believed to be packed inside crystals in symmetrical patterns that were repeated…
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Novel beings, novel goals
Every now and then there is the opportunity to get the a clear overview on the actual state of research on biology, intelligence, the artificial and it’s overlap towards future capabilities. “Novel beings, novel goals: evolution & engineering of the agential material of life | Dr. Mike Levin‘ is available on youtube. Dr. Michael Levin…
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Bayesian model: prior–cost
Sohna and Jazayeri discuss in “Validating model-based Bayesian integration using prior–cost metamers” the two competing views on how humans make decisions under uncertainty. Bayesian decision theory (BDT) posits that humans optimize their behavior by establishing and integrating internal models of past sensory experiences (priors) and decision outcomes (cost functions). An alternative hypothesis posits that decisions…
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Representation of priors and decisions
The PLOS article by Marshall, Ruesseler, Hunt, O’Reilly “representation of priors and decisions in the human parietal cortex” discusses how both humans and animals actively sample the environment using their sensory organs, far from being passive recipients of sensory information. In rodents, active sampling processes include whisking and sniffing; in primates, the most important and…
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AI Resources – A Worry
ChatGPT is the first non-human addition to the list of people who shaped science… But also we have a worry related to this fact, as told in the (Dec.19,2023) Quote of the day “What worries me is we don’t have the resources to make sure that academic AI continues to be a centre of gravity.…
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It Takes Two To Think
The title refers to the recent article by Yanai & Lercher. (Itai Yanai is a Professor at the NYU School of Medicine. Martin Lercher is Professor at Heinrich Heine University Düsseldorf at both the Institute for Computer Science and the Department of Biology. ) At the heart of science is a creative ‘night science‘ process,…
