Preprint reports quadruped robot jumping through narrow gates
A two-level learning system combined continuous movement skills with vision-informed velocity commands in simulation and on a Unitree Aliengo robot.
Search
418 results
21–40
Preprint: X-ray snapshots track hidden casein changes as milk gels
A time-resolved lab study found hydrolysis preceded aggregation, while the changing scattering pattern fit a porous “snowball” model better than a diffuse core-shell model.
Preprint proposes a local test for harmonic stability in power systems
In one averaged converter model, HSS eigenvalue indicators stayed negative and a matrix-based stability condition was feasible across the tested truncation orders.
Preprint identifies when random valuations have independent increments
A theoretical study represents random rules for valuing convex shapes as weighted jumps and extends the analysis to stationary and isotropic cases.
Preprint reports proof of a coding-theory distance conjecture
A refined Bézout bound also yields lower bounds for generalized Hamming weights, while a broader Cartesian-code conjecture remains open.
Preprint: Solar brightening offers clues to possible magnetic reconnection
A study of a recurrent chromospheric brightening combines temperature, velocity and three-dimensional magnetic modeling, while leaving the event’s mechanism unresolved.
Preprint reports more internal than leaf numerical semigroups in several finite counts
A computational study maps the tree of these mathematical objects, while leaving broader growth patterns as conjectures.
Preprint method matches exact quantum test and anthracene spectrum
A Hagedorn-wavepacket calculation agreed closely with a controlled harmonic-model result and an experimental spectrum, while revealing important limits.
Preprint reports strong agreement for an open acoustic resonator model
A two-dimensional calculation reproduced complex frequencies and mode shapes against exact and finite-element results, while dispersive media remain outside the study.
Preprint: Under weak stability, a boundary problem leaves only round balls
A theorem by Michael Eichmair and Thomas Koerber gives a complete classification under Serrin’s stated equations, boundary conditions and stability requirement.
Preprint proposes a simpler route to precision limits in dynamical quantum measurements
A theoretical framework replaces a difficult matrix calculation with scalar bounds, but its promise remains untested outside modelled quantum systems.
Preprint finds truck-driver model captures broad road-speed patterns
Simulator and field logs showed strong radius and driver signals, while curve direction was weaker and uphill behavior harder to model.
Preprint gives exact local count for facet gaps in finite posets
A deterministic formula links the difference between chain and order polytopes to star elements and extends to a specified marked chain–order construction.
Preprint: Medical AI models lose accuracy in lower-resource languages
A nine-language benchmark found the steepest gaps in Swahili and Zulu, while proprietary systems were more stable than open-source and medically specialized models.
Preprint: COPA reports lower prompt-injection success rates in tests
The continual-learning defense had lower benchmark attack success rates than SecAlign and LlamaGuard while matching or exceeding the undefended base model on two question-answering tests.
Preprint model shows arc-like heat and uplift while no clearly developed cold slab appeared
A 3-D simulation of the Lesser Antilles showed a temperature rise above 226 K, a ridge emerging after about 5 million years and modeled mantle melting 20–50 km down.
Preprint tracks how sound scatters through complex open resonators
A resonant-state expansion matched Mie theory and COMSOL in modeled cases while revealing frequency-selective routing in an annular metaatom.
Preprint sets a mathematical lower bound on recurring particle-field motions
A theorem gives at least (nd + 1) periodic solutions in a restricted stochastic model, while leaving full electrodynamics and physical applications unresolved.
Preprint Shows When a Mathematical Inverse Can Be Extended
A proof-based study establishes a unique, continuous extension under closedness and convexity, while an open half-disk example shows why the boundary matters.
Preprint establishes one-sided curvature bounds for obstacle-problem boundaries
The theoretical work gives a local upper limit on mean curvature, but not on the full second fundamental form in dimensions three and above.