Yield precursor dislocation avalanches in small crystals: the irreversibility transition

Posted by klaurent Caltech

Kavli Affiliate: Julia R. Greer | Summary:The transition from elastic to plastic deformation in crystalline metals shares history dependence and scale-invariant avalanche signature with other non-equilibrium systems under external loading: dilute colloidal suspensions, plastically-deformed amorphous solids, granular materials, and dislocation-based simulations of crystals. These other systems exhibit transitions with clear analogies to work hardening and […]


Continue.. Yield precursor dislocation avalanches in small crystals: the irreversibility transition

Compressive Light Field Reconstructions using Deep Learning

Posted by klaurent Cornell

Kavli Affiliate: Alyosha Molnar | Summary:Light field imaging is limited in its computational processing demands of high sampling for both spatial and angular dimensions. Single-shot light field cameras sacrifice spatial resolution to sample angular viewpoints, typically by multiplexing incoming rays onto a 2D sensor array. While this resolution can be recovered using compressive sensing, these […]


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Computation of a Theoretical Membrane Phase Diagram, and the Role of Phase in Lipid Raft-Mediated Protein Organization

Posted by klaurent Cornell

Kavli Affiliate: Barbara Baird | Summary:Lipid phase heterogeneity in the plasma membrane is thought to be crucial for many aspects of cell signaling, but the physical basis of participating membrane domains such as "lipid rafts" remains controversial. Here we consider a lattice model yielding a phase diagram that includes several states proposed to be relevant […]


Continue.. Computation of a Theoretical Membrane Phase Diagram, and the Role of Phase in Lipid Raft-Mediated Protein Organization

Deformation twin nucleation and twin variant selection in single crystal magnesium as a function of strain rate

Posted by klaurent Caltech

Kavli Affiliate: G. Ravichandran |Summary:Deformation twinning is an important deformation mechanism in a variety of materials, including metals and ceramics. This deformation mechanism is particularly important in low-symmetry hexagonal close-packed (hcp) metals such as Magnesium (Mg), Zirconium (Zr) and Titanium (Ti). Extension twins in Mg, Zr and Ti can accommodate considerable plastic deformation as they […]


Continue.. Deformation twin nucleation and twin variant selection in single crystal magnesium as a function of strain rate

Deep convolutional neural networks for segmenting 3D in vivo multiphoton images of vasculature in Alzheimer disease mouse models

Posted by klaurent Cornell

Kavli Affiliate: Chris B. Schaffer | Summary:The health and function of tissue rely on its vasculature network to provide reliable blood perfusion. Volumetric imaging approaches, such as multiphoton microscopy, are able to generate detailed 3D images of blood vessels that could contribute to our understanding of the role of vascular structure in normal physiology and […]


Continue.. Deep convolutional neural networks for segmenting 3D in vivo multiphoton images of vasculature in Alzheimer disease mouse models

On the Yau-Tian-Donaldson conjecture for singular Fano varieties

Posted by klaurent Cornell

Kavli Affiliate: Zhiting Tian | First 5 Authors: Chi Li, Chi Li, , , | Summary: We prove the Yau-Tian-Donaldson’s conjecture for any $mathbbQ$-Fano variety that has a log smooth resolution of singularities such that the discrepancies of all exceptional divisors are non-positive. In other words, if such a Fano variety is K-polystable, then it […]


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Precision and accuracy of single-molecule FRET measurements – a worldwide benchmark study

Posted by klaurent Oxford

Kavli Affiliate: Achillefs Kapanidis | Summary:Single-molecule Förster resonance energy transfer (smFRET) is increasingly being used to determine distances, structures, and dynamics of biomolecules in vitro and in vivo. However, generalized protocols and FRET standards ensuring both the reproducibility and accuracy of measuring FRET efficiencies are currently lacking. Here we report the results of a worldwide, […]


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Information-theoretic analysis of the directional influence between cellular processes

Posted by klaurent Delft

Kavli Affiliate: Sander Tans | Summary:Inferring the directionality of interactions between cellular processes is a major challenge in systems biology. Time-lagged correlations allow to discriminate between alternative models, but they still rely on assumed underlying interactions. Here, we use the transfer entropy (TE), an information-theoretic quantity that quantifies the directional influence between fluctuating variables in […]


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Charge Berezinskii-Kosterlitz-Thouless transition in superconducting NbTiN films

Posted by klaurent Caltech

Kavli Affiliate: Thomas Rosenbaum | Summary:A half-century after the discovery of the superconductor-insulator transition (SIT), one of the fundamental predictions of the theory, the charge Berezinskii-Kosterlitz-Thouless (BKT) transition that is expected to occur at the insulating side of the SIT, has remained unobserved. The charge BKT transition is a phenomenon dual to the vortex BKT […]


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The interplay between long- and short-range temporal correlations shapes cortex dynamics across vigilance states

Posted by klaurent Oxford

Kavli Affiliate: Vladyslav Vyazovskiy | Summary:Increasing evidence suggests that cortical dynamics during wake exhibits long-range temporal correlations suitable to integrate inputs over extended periods of time to increase the signal-to-noise ratio in decision-making and working memory tasks. Accordingly, sleep has been suggested as a state characterized by a breakdown of long-range correlations; detailed measurements of […]


Continue.. The interplay between long- and short-range temporal correlations shapes cortex dynamics across vigilance states