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JAMMING. “Granular matter, and indeed many other athermal amorphous materials, exhibit an intriguing property known as jamming. The standard characterization of this phenomenon is in terms of strong stress heterogeneities occurring in the material, with and without an externally applied stress.” https://lnkd.in/dusKMKM View in LinkedIn

THE PHILOSOPHER’S KNOT. “The three possibilities are all correct but they answer different questions.” https://lnkd.in/d3Fw6gf View in LinkedIn

IT IS ASSUMED by most of us that the macro is a fractal reflection of sorts of the micro. But this ignores the phenomenon of emergence that occurs when simple elements aggregate to form complexity with unexpected properties that are not the sum of its parts. That said, this essay on coarse material jamming is a diamond in the rough, and the two professors were lucky to have such talented students. https://lnkd.in/dusKMKM View in LinkedIn

COMPLEX GEODESICS. “Geodesics in Complexity Geometry. If the geometry is defined by the usual inner product metric then the curve will be a geodesic for any H. Geodesics generated in this way are not homogeneous along their length.” https://lnkd.in/d3Fw6gf View in LinkedIn

FRAGMENT FROM NATURE for this and next weekend focuses in a remarkable essay authored by two MSc students and their advisors who made observations on the jamming of material like sand in a funnel, and derived conclusions about relativity and black holes from it. Johannes Kepler’s famous 1610 essay in the six sided snowflake similarly extrapolated from a snowflake to material packing. It is in the honored tradition of serious people making observations on things like peacock feathers, beetle casings and butterfly wing scales and deriving conclusions about optics from them. https://lnkd.in/duxTaRF View in LinkedIn

FRACTAL HOLES. “Complexity geometry was introduced by Nielsen and collaborators and applied to black holes. The geometry is fractal-like.” https://lnkd.in/d3Fw6gf View in LinkedIn

THE CORE ANALOGY. “General Relativity is well-known to be inherently non-linear, and to admit a great many time-dependent solutions (like gravitational collapse solutions) which, from a statistical standpoint correspond to distinctly non-equilibrium processes. In many cases though, constant-time spatial slices do reveal steady state aspects of such solutions.” https://lnkd.in/dusKMKM View in LinkedIn

The most beautiful of all the ancient Greek coins, signed by Kimon. " " https://lnkd.in/dzZypJq View in LinkedIn

SURREALIST LEONORA CARRINGTON. “She sought to capture fleeting scenes of the subconscious where real memories and imagined visions mingle. In Carrington’s rich universe, ethereal beings enact rituals with unknown purposes; these creatures have characteristics of women and animals, and seem to be somewhere between humans and beasts.” https://lnkd.in/d8TMTkF View in LinkedIn

BALANCED SYMMETRIES. “The proposal naturally embodies the local translational and rotational symmetries corresponding respectively to force and torque balance in the standard approach to grain interactions, but with a Riemannian-geometrical description in terms of spatial curvature replacing the standard Newtonian force paradigm.” https://lnkd.in/dusKMKM View in LinkedIn