Tag: Science
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Affective State as a central component to environmental changes
“Considering affective state as a central component of the response of animals to environmental changes” Current environmental changes are often considered as negatively impacting the affective state of animals. Yet, the interplay betweenenvironmental conditions and affective state should rather be viewed as a reciprocal and dynamic relationship, as variation in affective state likely determines how…
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The Universe Learning Itself
“The Universe Learning Itself: On the Evolution of Dynamics from theBig Bang to Machine Intelligence” We develop a unified, dynamical-systems narrative of the universe that traces a continuous chain of structure formation from the Big Bang to contemporary human societies and their artificial learning systems. Rather than treating cosmology, astrophysics, geophysics, biology, cognition, and machine…
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Why collective behavioursself-organize to criticality
“Why collective behaviours self-organize to criticality: a primer on information-theoretic and thermodynamic utility measures” Collective behaviours are frequently observed to self‑organize to criticality. Existing proposals to explain these phenomena are fragmented across disciplines and only partially answer the question. This primer compares the underlying, intrinsic, utilities that may explain the self‑organization of collective behaviours near…
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The ‘made-up mind’.
“The ‘made-up mind’. Deriving new hypotheses on delusions from general psychological models of belief maintenance” Highlights Contemporary definitions of delusions highlight their resistance to conflicting evidence as the core feature, but there has been little progress in understanding why even explicit confrontation with contradicting evidence seldom leads to belief revision. This review aims to generate…
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Brain-body physiology
“Brain-body physiology: Local, reflex, and central communication” Behavior is tightly synchronized with bodily physiology. Internal needs from the body drive behavior selection, while optimal behavior performance requires a coordinated physiological response. Internal state is dynamically represented by the nervous system to influence mood and emotion, and body-brain signals also direct responses to external sensory cues,…
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Climate Change, A Geoscience Perspective
Climate Change, A Geoscience Perspective This open access book on climate change assesses past climatic change from a geoscience perspective and directly and effectively addresses common misconceptions on climate and climate change. A geoscience perspective on the multiple causes, rates, and consequences of climate change is essential context to assess modern climate change and our…
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Top-down and bottom-up neuroscience
“Top-down and bottom-up neuroscience: overcoming the clash of research cultures“ As scientists, we want solid answers, but we also want to answer questions that matter. Yet, the brain’s complexity forces trade-offs between these desiderata, bringing about two distinct research approaches in neuroscience that we describe as ‘top-down’ and ‘bottom-up’. Bottom-up neuroscience The bottom-up research culture…
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misguidedly radical ideas?
“Is bad philosophy holding back physics?“ Carlo Rovelli states:“My hunch is that it is at least partly because physicists are bad philosophers. Scientists’ opinions, whether they realize it or not (and whether they like it or not), are imbued with philosophy. And many of my colleagues — especially those who argue that philosophy is irrelevant…
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Resilience phenotypes derived from an active inference account of allostasis
“Resilience phenotypes derived from an active inference account of allostasis“:Within a theoretical framework of enactive allostasis, we explore active inference strategies for minimizing surprise to achieve resilience in dynamic environments. While individual differences and extrinsic protective factors traditionally account for variability in resilience trajectories following stressor exposure, the enactive model emphasizes the importance of the…
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Top-down influences
“Top-down influences on the perception of emotional stimuli” (also available as PDF) The ability to quickly and accurately perceive external emotional stimuli — events in the environment that evoke changes in feelings, physiology and behaviour — is vital for adaptive social interactions and effective decision making in everyday life. Contemporary theories of emotional perception emphasize the influence of top-down…
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Power of the Invisible
“The Power of the Invisible: The Quantessence of Reality” from Sander Bais There are two possible outcomes: if the result confirms the hypothesis, then you’ve made a measurement. If the result is contrary to the hypothesis, then you’ve made a discovery. Enrico Fermi Quantum Physics is the solid basis of most of our understanding of…
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Greatness Cannot Be Planned
Why does modern life revolve around objectives? From how science is funded, to improving how children are educated — and nearly everything in-between — our society has become obsessed with a seductive illusion: that greatness results from doggedly measuring improvement in the relentless pursuit of an ambitious goal. In Why Greatness Cannot Be Planned—The Myth of…
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Is Ockham’s razor losing its edge?
Is Ockham’s razor losing its edge? New perspectives on the principle of model parsimony The preference for simple explanations, known as the parsimony principle, has long guided the development of scientific theories, hypotheses, and models. Yet recent years have seen a number of successes in employing highly complex models for scientific inquiry (e.g., for 3D…
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Why probability probably doesn’t exist
(but it is useful to act like it does) David Spiegelhalter All of statistics and much of science depends on probability — an astonishing achievement, considering no one’s really sure what it is. In our everyday world, probability probably does not exist — but it is often useful to act as if it does.— David…
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The unbearable slowness of being …
The unbearable slowness of being: Why do we live at 10 bits/s? This article is about the neural conundrum behind the slowness of human behavior. The information throughput of a human being is about 10 bits/s. In comparison, our sensory systems gather data at ∼109 bits/s. The stark contrast between these numbers remains unexplained and touches…
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The power of parsimony
“Walking the talk on multi-level interventions: The power of parsimony“ There is strong consensus regarding the need for multi-level interventions (MLIs) to address today’s complex health problems. The greatest public health burdens globally (e.g., chronic and infectious diseases) derive from a mix of causal and contributing factors and are inherently complex, operating interdependently and reflexively…
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Energy cost of computation: stochastic thermodynamics?
“Is stochastic thermodynamics the key to understanding the energy costs of computation?” The relationship between the thermodynamic and computational properties of physical systems has been a major theoretical interest since at least the 19th century. It has also become of increasing practical importance over the last half-century as the energetic cost of digital devices has…
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KNOWLEDGE ACQUISITION hindered by KNOWLEDGE ENTROPY DECAY during language model pretraining
This paper describes how a model’s tendency to broadly integrate its parametric knowledge evolves throughout pretraining, and how this behavior affects overall performance, particularly in terms of knowledge acquisition and forgetting. The concept of knowledge entropy is introduced, which quantifies the range of memory sources the model engages with; high knowledge entropy indicates that the…
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