VGOcc: Learning Visual-Geometric Gaussians for Vision-Centric 3D Driving Occupancy Prediction

Posted by klaurent Caltech, This Week: Nanoscience

Kavli Affiliate: Wei Gao| Summary:Vision-only occupancy prediction requires recovering a semantic 3D occupancy field from calibrated surround-view images, where each view provides observations with ambiguous depth along camera rays. Existing methods have progressed from dense structured representations to sparse Gaussian primitives, improving the efficiency of 3D scene representation. However, Gaussian learning still relies primarily on […]


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Optically Thick Outflow Driven by Supercritical Accretion May Explain Little Red Dots

Posted by klaurent Peking

Kavli Affiliate: Luis Ho | Summary:Recent JWST observations have revealed a population of compact, optically red sources known as Little Red Dots (LRDs). A popular interpretation is that LRDs host massive black holes embedded in dense gaseous envelopes, yet the physical origin of such envelopes remains unclear. We propose that the optically thick outflow driven […]


Continue.. Optically Thick Outflow Driven by Supercritical Accretion May Explain Little Red Dots

Adaptive Ridge-Regularized Hotelling Change-Point Tests for Functional Data

Posted by klaurent Peking

Kavli Affiliate: Feng Long| Summary: We propose a unified ridge-regularized Hotelling framework for detecting and locating mean changes in functional time series. A growing basis expansion converts the functional observations into high-dimensional score vectors. Their long-run covariance is estimated by an edge-corrected difference-based procedure. Ridge regularization stabilizes inference under spectral decay. An explicit local-power formula […]


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Escaped White Dwarf Candidates from Open Clusters

Posted by klaurent Chicago

Kavli Affiliate: David W. Miller | Summary:Observations reveal a pronounced deficit of white dwarfs (WDs) in open clusters (OCs) relative to theoretical expectations, suggesting that a significant fraction of WDs may have escaped from their parent clusters after formation. In this work, we perform a systematic search for escaped WD candidates from OCs by back-tracing […]


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Harnessing disorder to decouple extension and shear in kirigami metamaterials

Posted by klaurent Peking

Kavli Affiliate: Feng Long| Summary: Kirigami turns stiff sheets into compliant, shape-morphing structures, but its reliance on periodic cut patterns comes at a cost: correlated panel rotations couple extension to shear, so stretching one axis drives a parasitic shear that cannot be suppressed, and also confine anisotropic stiffness to a narrow, discrete set of responses […]


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Dynamics and geometry of the inner sub-parsec-scale jet in 3C 279 observed with the Event Horizon Telescope

Posted by klaurent Peking

Kavli Affiliate: Luis Ho | Summary:The 2021 Event Horizon Telescope observations resolve the innermost jet region of the blazar 3C279 with unprecedented detail. The reconstructed images consistently reveal a compact core elongated nearly orthogonal to the large-scale jet axis. This rarely observed morphology recurs across multiple epochs and from 22-230 GHz and is therefore intrinsic […]


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OpenCosmo: Community Portal and Analysis Framework for Flagship Cosmological Simulations

Posted by klaurent Chicago

Kavli Affiliate: Katrin Heitmann | Summary:Cosmology is a precision observational science, and large simulations are necessary components of many analyses. These simulations are computationally expensive and produce massive, complex datasets; sharing them widely — to enable further explorations, comparison with observations, and communication with general audiences — is crucial to realizing their scientific value. In […]


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OpenCosmo: Community Portal and Analysis Framework for Flagship Cosmological Simulations

Posted by klaurent Chicago

Kavli Affiliate: Katrin Heitmann | Summary:Cosmology is an observational precision science, and detailed and scientifically rich simulations are necessary components of many analyses. These simulations are often computationally expensive and produce massive amounts of complex data. Sharing that data widely to enable further explorations, comparison with observations, and communication with general audiences is crucial to […]


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Enhanced Rydberg-Atom Superheterodyne Detection of Hidden-Photon Dark Matter on Chips

Posted by klaurent Tokyo

Kavli Affiliate: Shigeki Matsumoto | Summary:Although hidden-photon dark matter with masses above $10^-4,mathrmeV$ is well motivated by inflationary production, it remains largely unexplored by terrestrial experiments. Through kinetic mixing, hidden photons induce a weak oscillating electric field above $10,mathrmGHz$. We propose to amplify this signal using a compact high-frequency distributed cavity and detect it with […]


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Star formation, stellar evolution, and planets in high-resolution X-ray imaging

Posted by klaurent MIT

Kavli Affiliate: Moritz Guenther | Summary:Stars set the conditions for planet formation, planet evolution, and habitability — all major topics in astronomy today. Stars are also important in their own right as the most visible component of galaxies. In cool stars, X-ray emission is powered by magnetic fields, and so far our Sun is the […]


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