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SO ENDS this first of two weekends on the theme of emergence. Emergence is one of the most powerful new ideas in science, as well as one of the most mysterious. It is certain that we are a long way from grasping it fully at a mechanistic level. Thus we are reduced at this point to fully describing its manifestations. https://lnkd.in/eFDvNHBt View in LinkedIn

ROOTS. “Information theory is deeply rooted in probability theory, to the extent that the axiomatic bases of both are formally equivalent. Both approaches, in turn, are illuminated by the seminal work of E.T. Jaynes on the foundations of thermodynamics, which proposes that probability theory can be understood as an extension of Aristotelian logic that applies to scenarios of partial or incomplete knowledge.” https://lnkd.in/eFDvNHBt View in LinkedIn

MEREOLOGY. In contrast with other proposals, this approach is primarily mereological: emergence is considered to be a property of part-whole relationships within a system, which depends on the relationship between the dynamics of parts of the system and macroscopic features of interest.” https://lnkd.in/eFDvNHBt View in LinkedIn

THE HOPE. “This may explain why MOND does not work well at the cluster and cosmic scales, whereas MDM works at both the galactic and cluster scales and is expected to be completely compatible with cosmology.” (MOND = Milgrom’s theory of modified Newtonian dynamics; MDM = Modified Dark Matter). https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

OLD FAILINGS. “If we naively use MOND at the cluster or cosmic scale, we would be missing the pressure and cosmological constant terms, which could be significant.” (MOND = Milgrom’s theory of modified Newtonian dynamics). https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

The first spring violets in Girona, including the uncommonly seen white violet. The longer photoperiod is also engorging the reproductive readiness of the birds, who are entering an uproar of chorus. View in LinkedIn

“NATURE is the most powerful narcotic I've taken, and Purple Emperor should be declared illegal (Class A1).” (British naturalist, Matthew Oates, good friend for 60 years, personal communication). https://lnkd.in/eWESdTsC View in LinkedIn

NEW MODEL. “Furthermore, the physics of spacetime fluctuations also yields a(n arguably) successful dark energy model in terms of an effective positive cosmological constant (related to the Hubble parameter).” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

BLACK HOLE COMPUTERS. “We have argued that the laws of physics that determine the precision with which the geometry of spacetime can be measured also limit the power of and the amount of information contained in black hole computers.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

APPLICATION. “This interpretation of the Kolmogorov scaling in the quantum gravitational setting implies that the physics of turbulence may help us understand the quantum fluctuation phase of strong quantum gravity.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn