Restoring Invariance to the Mechanical Wave Equation across Inertial FramesThe mechanical wave equation, derived from Newton's laws, takes its simplest form in the rest frame of the medium, and appears to lose that form entirely once expressed in the coordinates of…Ashmeet Singh, Heather Romero Michel·Sep 29, 2026SaveLearn
Parametric excitation of rotational soft modes of the buckled discrete elastic ringIn the present study, we explore the existence and characteristics of a rotating vibrational mode in a discrete buckled ring that manifests under transverse harmonic forcing. The study is conducted…Panagiotis Koutsogiannakis, Massimo Ruzzene·Sep 28, 2026SaveLearn
Similarities between the speed limit in relativity and the sound barrier in inviscid fluid flowsThe Prandtl-Glauert-Lorentz transformation establishes a deep mathematical correspondence between compressible potential flow theory and special relativity. Despite being implicit in the aerodynamic…F Salmon·Sep 28, 2026SaveLearn
Generalized reverberation theory in diffuse sound fields: Introducing mean residual free path for macroscopic and microscopic unificationSabine's foundational theory established the cornerstone of modern architectural acoustics. However, it fails to predict zero reverberation time in perfectly absorptive rooms. Eyring subsequently…Toshiki Hanyu·Sep 28, 2026SaveLearn
The Myth of Hamel's ParadoxSubstituting a velocity constraint into the kinetic energy before forming Lagrange's equations yields, in general, incorrect equations of motion. Recent literature calls this failure…Robert Singer·Sep 25, 2026SaveLearn
3D modelling of strain concentration due to PCI within the fuel code ALCYONEIn this paper, the 3D scheme of the fuel code ALCYONE is applied to a database consisting of more than 50 base irradiations and ramp tests performed on rods with UO 2 , MOX or Cr-doped UO 2 fuels and…J. Sercombe, Jérôme Julien, Frederic Michel et al.·Sep 24, 2026SaveLearn
Characterizing the Carnot cycle at absolute zero: a reply to "Comment on `Proof of the Nernst theorem' "This reply addresses a recent comment concerning the proof of the Nernst theorem. I clarify how a Carnot engine can consistently operate at T=0 through a continuous deformation of a cycle operating…José-María Martín-Olalla·Sep 23, 2026SaveLearn
Exact turning invariants for projectile motion under quadratic drag and a vertical-axis Magnus forceA ball spinning about a vertical axis is pushed sideways by the Magnus force, so its ground track curves. We show that when the lift and drag coefficients are constant, the horizontal part of this…Pragyaan Gaur·Sep 22, 2026SaveLearn
Bypass transition under wall cooling over a flat plate with an elliptical leading edgeThis study uses wall-resolved large-eddy simulations to investigate bypass transition in a flat-plate boundary layer subjected to free-stream turbulence. Two thermal configurations are considered: an…Adèle Veilleux, Hugues Deniau, Olivier Vermeersch·Sep 21, 2026SaveLearn
Classical Electromagnetic Derivation of the Bohr SpectrumClassical electrodynamics including Lorentz-invariant classical electromagnetic zero-point radiation leads to a ground state and resonant excited states for a charged particle in a Coulomb potential.…Timothy H. Boyer·Sep 20, 2026SaveLearn
Short-term solar eclipse predictions using Euclidean geometry and dynamical systemsWe propose a computationally inexpensive algorithm to determine whether an opaque spherical body eclipses a luminous one, using only classical geometrical tools. We apply this method to the…Alin-Doru Aluas, Valerian-Alin Fodor, Virgilius-Aurelian Minuta·Sep 18, 2026SaveLearn
Impact of Phase Unwrapping on Multitarget Acoustic Lenses for Transcranial HolographyAcoustic lenses have been introduced recently to compensate for the phase distortions induced by the propagation across a human skull for ultrasonic deep-brain stimulation in humans. In this study,…D. Attali, T. Tiennot, M. Tanter et al.·Sep 16, 2026SaveLearn
Harmonic Vector Fields and Betti Numbers in Bounded Three-Dimensional Electromagnetic DomainsThe topology of a bounded three-dimensional domain can strongly affect electromagnetic fields. In a topologically complex domain, a curl-free field may not have a globally single-valued scalar…Wei Jiang, Jie Liu·Sep 16, 2026SaveLearn
Increase of the electromechanical coupling of piezoelectric vibration harvesters through lateral barsTo enhance the performance of vibration energy harvesters, it is essential to maximise the electromechanical coupling coefficient k2 of piezoelectric devices. This enables sufficient harvested…David Gibus, Grégoire Forges, Hélène Debéda et al.·Sep 14, 2026SaveLearn
Sliding contact fraction in gravity-driven dense cohesionless granular flowsUsing large-scale, three-dimensional discrete element simulations, we investigate the kinematic properties of granular chute flows of cohesionless grains, together with the evolution of the…Patrick Richard, Riccardo Artoni, Clovis Lambert et al.·Sep 14, 2026SaveLearn
Contact mechanics and friction of soft materials: an apparatus combining multi-axes dynamical actuation/measurement and in situ/in operando visualisationThe mechanics and friction of contact interfaces involving soft materials like gel, rubber or human skin are of both fundamental and applied interest. Recent insights have been made into this field…Matthieu Guibert, Antoine Aymard, Cristobal Oliver et al.·Sep 14, 2026SaveLearn
Plasmonics at radio frequenciesWe demonstrate that low loss radio frequency plasmon-like surface electromagnetic waves may propagate along rough interfaces between air and highly conductive media, such as water or metal. Unlike…Igor I. Smolyaninov, Quirino Balzano, John Mulholland et al.·Sep 10, 2026SaveLearn
Dunkl-Based Modeling of Vibrational Modes in Lightweight Elastic BeamsOptimizing slender elastic structures for renewable energy applications requires non-classical continuum formulations capable of accounting for spatial micro-interactions without sacrificing…Hacene Bouguerne·Sep 8, 2026SaveLearn
Projection Angles of Projectiles in Sports: Qualitative Assessment of the Effects of Aerodynamic Forces or Run-UpWe examine two major factors that influence the optimum projection angle: aerodynamic forces and the effect of run-up. With respect to aerodynamics, we consider not only the drag but also the lift…Kazuhiro Tsuboi·Sep 8, 2026SaveLearn
Conformal Symmetry and Planck's Thermal Radiation in Classical PhysicsThermal radiation is discussed for a classical scalar field. Dilation and acceleration appear in conformal symmetry, and so are treated in connection with zero-point radiation and equilibrium thermal…Timothy H. Boyer·Sep 7, 2026SaveLearn
Formation of grain boundaries in ductile single crystals under plane-strain simple shear: a block-coordinate finite element methodLarge plastic deformation can drive an initially uniform single crystal to spontaneously subdivide into misoriented grains separated by thin dislocation walls -- a pattern-forming instability rooted…Khanh Chau Le, Thanh Danh Nguyen·Sep 7, 2026SaveLearn
A purely mechanical system realizing a Coulomb-like interactionWe solve in closed form a one-dimensional relativistic system: two masses interacting only through elastic collisions with a massless mediator bouncing between them. Momenta, times, and positions are…June-Haak Ee, U-Rae Kim, Jungil Lee·Sep 7, 2026SaveLearn
Induced electromotive force of a thin metal rod in the alternating electromagnetic field of Helmholtz coil: experimental results and theoretical analysisWe apply a thin metal rod (copper rod) as a probe in the alternating magnetic field generated by a Helmholtz coil, and measure the variation of the induced electromotive force (EMF) on the metal rod…Yilin Shao, Minghan Gao, Baiqing Li et al.·Sep 6, 2026SaveLearn
Repeated Binary Direct Collinear Impacts Under Incremental Contact Laws With Residual Indentation: A Hybrid Systems FormulationIncremental contact laws specify the normal contact force through a differential relation, possibly carrying an internal state, driven by the indentation and its rate. In some, the force is…Mihails Milehins, Dan B. Marghitu·Sep 5, 2026SaveLearn
Cartesian isotropic tensors revisitedAn alternative, streamlined methodology is presented for deriving the isotropic Cartesian tensor bases under the special orthogonal group SO(3). By shifting the traditional interpretation of…Antonio O. Bouzas·Sep 4, 2026SaveLearn