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 Permanent Indentation: A Hybrid Systems FormulationIncremental contact laws specify the normal contact force through a differential equation carrying an internal state, driven by the indentation and its rate. In some, the force is extinguished at a…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
Symmetry Promotion in ElectromagnetismA symmetric distribution of charges or currents typically produces an electromagnetic field having the same symmetry group. However, under special circumstances we show that a discrete symmetry of…Hunter Swan, Jason M. Hogan·Sep 3, 2026SaveLearn
Lissajous-type orbits on a sphere and their non-Riemannian geometryA charged test particle is confined to the round sphere in a uniform ambient magnetic field. We reduce its motion to quadrature by elementary means and solve explicitly the family of trajectories…César Simón López-Monsalvo, Sergio Islas-Ramírez, Alberto Rubio Ponce·Sep 1, 2026SaveLearn
Some explorations of Kirchhoff dynamicsThe classical problem of a rigid body in an ideal fluid is a six-dimensional dynamical system with three conserved quantities. Despite its long history and its importance as a reduced model of many…O. W. Oguns, J. A. Hanna·Sep 1, 2026SaveLearn
The Schwitters Memorial Problem: A Car Speeds Across a Triangular BumpMost drivers slow down for speed bumps, sometimes to almost a stop, as if each speed bump were a stop or yield sign. The late Roy Schwitters and I shared the view (here called the Schwitters…William H. Press·Aug 29, 2026SaveLearn
Free Precession Revisited: A Vector-Only Analysis of Gyroscopic Dynamic EquilibriumThis paper presents a self-contained, vector-only formulation of gyroscope precession about a fixed pivot -- gravity-driven, not the torque-free Euler-Poinsot case. The analysis uses only vector…Dan I. Hariton·Aug 29, 2026SaveLearn
Casimir-electrostatic pull-in in nanoelectromechanical actuators: Differentiable design sensitivities and the damping-dependent collapse boundaryNanoelectromechanical actuators operating at sub-100-nm gaps collapse through a pull-in instability set by competing electrostatic and Casimir forces. The quasi-static fold that bounds their safe…N. S. Akintsov, A. P. Nevecheria, S. N. Andreev et al.·Aug 28, 2026SaveLearn
Covariant Electrodynamics with a Scalar Degree of FreedomWithin the Clifford algebra of spacetime, a covariant electrodynamics is formulated in which the derivative of the four-potential contains a scalar field (S) in addition to the electromagnetic…Seil Sautbekov·Aug 27, 2026SaveLearn
Electromagnetic Radiation from a Neutralized Polarized Sphere with Two Conserved Currents for One Charge HistoryCan a source radiate when its total charge density vanishes identically? Consider a uniformly polarized sphere coated with free surface charge that cancels the bound surface charge at every point and…Natan Rentzber·Aug 25, 2026SaveLearn
The Photon Gas in Classical Mechanics: A Statistical-Mechanical Treatment of Classical Field TheoryThe thermodynamics of cavity radiation is usually introduced through the quantum theory of a photon gas. In contrast, we investigate which features of thermal radiation follow from classical…Farhang Loran, Saman Moghimi-Araghi·Aug 24, 2026SaveLearn
Hydrogen Molecular Ion and Molecule in Classical Electrodynamics with Classical Zero-Point RadiationThe hydrogen molecular ion and the hydrogen molecule are treated in an approximate calculation based on classical electrodynamics which includes classical zero-point radiation. It is found within the…Timothy H. Boyer·Aug 23, 2026SaveLearn
Spheroid rolling up on diverging inclinesObjects rolling upward on diverging inclined rails exhibit a counterintuitive behavior that has intrigued physicists and students alike. Among the most well-known is the double-cone paradox, where a…Khanh P. M. Hoang, Duy V. Nguyen·Aug 20, 2026SaveLearn