High-speed, low-noise, multi-megapixel CCDs for next generation X-ray observatories

Posted by klaurent MIT

Kavli Affiliate: Marshall Bautz | Summary:Next generation X-ray observatories require fast, low-noise, low-power, multi-megapixel imaging spectrometers. To meet these demands, the X-ray Astronomy and Observational Cosmology (XOC) Group at Stanford, in partnership with the MIT Kavli Institute and MIT Lincoln Laboratory (MIT-LL), is developing multi-channel X-ray charge-coupled devices (CCDs) and fast readout architectures. We report […]


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SpatialQ: Understanding 3D Gaussian Splatting Scene Quality via Visual-based MLLM

Posted by klaurent Caltech

Kavli Affiliate: Wei Gao| Summary:3D Gaussian Splatting (3DGS) has emerged as an effective representation for novel view synthesis and 3D scene reconstruction, creating an increasing demand for reliable quality assessment. Unlike conventional image quality assessment (IQA), the quality of a 3DGS scene depends not only on the perceptual fidelity of rendered views, but also on […]


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Secure Relay Low-Altitude Networks via Hybrid Fixed-Position and Rotatable Antenna Arrays

Posted by klaurent Caltech

Kavli Affiliate: Wei Gao| Summary:In this paper, a relay network with hybrid fixed-position and rotatable antenna arrays is proposed. The deployment of rotatable arrays in conventional relay networks is considered to provide more secure communications for low-altitude economy applications. Specifically, both the base station and the relay station are equipped with fixed-position antenna arrays and […]


Continue.. Secure Relay Low-Altitude Networks via Hybrid Fixed-Position and Rotatable Antenna Arrays

Secure Relay Low-Altitude Networks via Hybrid Fixed-Position and Rotatable Antenna Arrays

Posted by klaurent Caltech

Kavli Affiliate: Wei Gao| Summary:In this paper, a relay network with hybrid fixed-position and rotatable antenna arrays is proposed. The deployment of rotatable arrays in conventional relay networks is considered to provide more secure communications for low-altitude economy applications. Specifically, both the base station and the relay station are equipped with fixed-position antenna arrays and […]


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Feedback stabilization of multi-qubit Hamiltonian parameters enabled by single-shot measurement-based sequential Monte Carlo

Posted by klaurent Delft

Kavli Affiliate: Giordano Scappucci | Summary:Fast measurement, signal processing, and accurate estimation of Hamiltonian parameters are essential for feedback control in quantum-classical interface circuitry. However, existing frequentist and Bayesian inference methods typically require a large number of measurements to achieve the accuracy needed to mitigate qubit decoherence. Consequently, feedback control of semiconductor qubits has largely […]


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How to raise a supermassive black hole: interpreting early JWST AGN with the AESOPICA simulations

Posted by klaurent Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:The active black holes uncovered by JWST in the early Universe are highly abundant and seemingly overmassive with respect to local scaling relations, challenging standard models of black hole formation and growth. Yet it remains unclear whether they trace an efficient early growth channel, the observable tail of a broader […]


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Microglia extract neuronal proteolytic organelles via skoupocytosis – Copy

Posted by dbos Hopkins

  Kavli Affiliate: Reza Shadmehr | Authors: Jafar Doostmohammadi, Nazanin Mohammadrezaei, Hisham Elseweifi, Alana Chandler, Elijah Taeckens and Reza Shadmehr | Summary: Neurons in the brain are often many synapses away from motoneurons, yet if a movement results in error, each distant neuron needs a teacher that considers its specific contribution to production of that […]


Continue.. Microglia extract neuronal proteolytic organelles via skoupocytosis – Copy

Tricouplers for nulling interferometry with photonic integrated circuits

Posted by klaurent Caltech

Kavli Affiliate: Dimitri Mawet| Summary:Solar System analog gas giants and habitable-zone terrestrial planets are observationally elusive to conventional exoplanet detection and characterization techniques, i.e. transits, radial velocities, and direct imaging. Long baseline nulling interferometry across multiple apertures suppresses starlight and enables detection of faint planetary signals at higher spatial resolution than traditional coronagraphs on single-aperture […]


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High-statistics simulations of NewAthena WFI background using Geant4

Posted by klaurent MIT

Kavli Affiliate: Marshall Bautz | Summary:The observation of hot gas structures is one science goal of the Wide Field Imager (WFI) on ESA’s NewAthena X-ray observatory. Because the measurement of these faint diffuse sources is limited by background from cosmic ray particle interactions within the instrument, understanding and reducing this background is critical. To this […]


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The FRB–Galaxy Overdensity Cross-Correlation Statistic in Dispersion Space

Posted by klaurent MIT

Kavli Affiliate: Kiyoshi Masui | Summary:Cross-correlating the dispersion of fast radio bursts (FRBs) with galaxies provides a means to study the distribution of the baryons in the Universe, even in the absence of FRB redshifts. To this end, two variants of angular cross-power spectrum statistics have been proposed: one between DM and galaxy density binned […]


Continue.. The FRB–Galaxy Overdensity Cross-Correlation Statistic in Dispersion Space