Preprint ties accelerated transport convergence to mesh scale
A mathematical analysis and numerical tests report strict acceleration in an optically thick model, with the approximation controlled by a local Knudsen number.
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Quasi-2D model tracks 3D convection with insulated spanwise walls
Preprint: A numerical comparison found close agreement under insulated spanwise conditions, but noticeable differences with conducting walls.
Preprint sets out an algorithm for rank-two algebraic categories
The study classifies indecomposable objects, recovers their W-graphs and tests the procedure across low-rank cases.
Preprint uses sound spectra to measure timbral distance
An arXiv preprint compares vocal and instrumental spectra, then explores whether the same geometry can inform fingerings and chord voicings.
Quasar’s changing X-rays put its ultrafast wind farther out
Preprint: Soft X-ray changes point to a low-ionization wind at least 4,000 gravitational radii from the black hole.
LISA Simulations Find Large Waveform Shifts From Scalar Hair
Preprint forecasts that future extreme-mass-ratio inspiral signals could reveal the coupling and scalar mass, but its waveforms remain an effective, incomplete model.
Mathematics preprint finds non-klt counterexamples to index bounds
A constructed three-dimensional family keeps minimal log discrepancy at one while its Cartier index can take any positive integer value.
Rho Leo Shows a Persistent 16-Day Spectroscopic Rhythm
Preprint analysis favors non-radial pulsations, but it leaves open the possibility that a companion is involved.
Text Models Spot Evasion Better Than They Read Vocal Confidence
Preprint: A benchmark of 505 earnings-call answers found a sharp gap between textual-evasion detection and vocal-confidence detection, while speaker context delivered only modest gains.
Active colloid chains can look balanced while still dissipating
Preprint simulations find zero orientational entropy production in fixed-geometry cases, while whole-system entropy production remains finite.
Brain MRI Review Finds Safety Checks Rarely Test Small Lesions
Preprint review of 263 studies says high image-fidelity scores cannot certify diagnostic safety when reader testing and acute-pathology benchmarks are scarce.
Large diffusion sorts a nonlinear heat equation into three outcomes
Preprint: A mathematical analysis gives a uniform rule for decay, threshold behavior and finite-time blow-up as diffusion grows.
Foraging Agents Learn to Cluster Without a Grouping Reward
Preprint: Agents rewarded for finding targets learned collective search at longer visual ranges, despite never seeing the targets.
One of Three Contact Binaries Is Near an Instability Threshold
Preprint: ZZ PsA is borderline, while AL Lep appears more advanced and ASAS J082243+1927.0 looks less evolved.
Preprint finds fluid-dependent sonic points around a deformed black hole
Calculations compare idealized fluids around a deformed black hole, while the paper reports different values in its prose and table for some cases.
Medical AI method links uncertainty to features in each prediction
Preprint: egRUE scored strongly on four medical datasets, while a five-expert study linked explanations to better-calibrated trust, not patient outcomes.
AI Models Struggle to Rebuild How Chinese Internet Words Are Made
Preprint: A benchmark of 4,759 Chinese neologisms finds a sharp gap between explaining a word and reproducing the form behind it.
Polymer models track faster creep and a shifting load-carrying structure
An arXiv Preprint reports that self-consistent and finite-element models reproduced the experimental trend in amorphous PEI near its glass transition.
Quantum circuit estimates particle scattering and interference
A preprint reports a classical simulation of a quantum circuit that estimated Drell-Yan cross sections and interference, while exposing gaps in angular coverage and a heavy sampling burden.
MPC method bounds disturbance reserve before full solve
A preprint describes an online certificate that trades tightness for computation in two constrained linear-system benchmarks.