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Sample Reuse Does Not Beat Second-Order Query Limits

A curvature-first algorithm and reuse-aware lower bounds match total derivative complexity at near ε⁻³ + γ⁻³ scaling.

Oct 14, 20263 min2610.16832

OpenH-RF Makes Raw Ultrasound Data Usable at Scale

A 40 TB, 19,332-acquisition corpus packages raw channel signals, acquisition metadata, and reconstructions so researchers can process heterogeneous ultrasound data selectively.

Oct 13, 20264 min2610.13616

Agents’ Last Exam Reports Below-1% Average Full-Pass Rates on Its Hardest Tier

A living benchmark built with 250+ industry experts tests verifiable professional workflows and finds average full-task pass rates below 1% on its hardest tier.

Oct 13, 20264 min2606.05405

Lower Bound Extends Beyond Tensor Algorithms

Exactly flat gates turn a scalar convex–concave chain into a hard instance, matching the known $2/(3p-1)$ higher-order exponent up to logarithmic factors.

Oct 12, 20264 min2609.28246

Lower AI Use Targets Reduce Gaming and Raise Sales

A staggered cut from 200 to 100 monthly AI queries removed mostly low-value activity while leaving work-related use intact and increasing sales by 7%.

Oct 12, 20264 min2609.32859

AcuityBench Exposes Miscalibrated Clinical Triage Uncertainty

A 914-case benchmark tests 12 models across four care levels, showing that conversational triage trades less over-triage for more under-triage.

Oct 11, 20264 min2605.11398

Hard X-Ray Laser Reconstructs a Single Protein in 3D

Nanofocused 6 keV XFEL pulses and diffraction-pattern classification recover erythrocruorin to roughly 20 Å in three dimensions without cryo-fixation.

Oct 11, 20264 min2610.11892

Whole-Study MIL Improves Prenatal CHD Screening

Masked-autoencoder pre-training, disease-robust cardiac-frame gating, and transformer pooling produce study-level CHD predictions without clinician-selected frames.

Oct 10, 20264 min2609.31376

Common-Loss Oracles Match Second-Order Tolerance Bounds

Random-line Hessian estimates and a dyadic gradient tracker attain the minimax $\widetilde{\Theta}(\epsilon^{-3}+\gamma^{-5})$ oracle rate without the earlier mixed tolerance cost.

Oct 9, 20264 min2609.28238

Third-Party Gift Cards Show Higher Incrementality

A transferability-based estimator combines censored purchase records with roughly 26,000 experimental observations to isolate incremental revenue across four distribution channels.

Oct 8, 20265 min2610.08558

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