Results 31 to 40 of about 116 (113)

Vortex Line Density in a Superfluid Turbulent Wake in the Zero Temperature Limit

Annalen der Physik, Volume 538, Issue 1, January 2026.
The quasiclassical conjecture for quantum turbulence in a pure superfluid straightforwardly leads to the definition of the superfluid Reynolds number, Res=ud/κ$Re_s=ud/\kappa$, and suggests that the effective quantum viscosity should be of the order of the circulation quantum κ$\kappa$.
Hiromitsu Takeuchi
wiley   +1 more source

Reciprocal Convex Costs for Ratio Matching: Axiomatic Characterization

Axioms
We study ratio-induced mismatch cost functions of the form c(s,o)=JιS(s)/ιO(o) built from positive scale maps ιS:S→R>0 and ιO:O→R>0 and a penalty J:(0,∞)→[0,∞).
Jonathan Washburn, Amir Rahnamai Barghi
doaj   +1 more source

Data Driven Based Bridge Damage Identification Using a Statistical Approach Utilizing Vehicle‐Induced Acceleration Responses

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
The integration of data‐driven methodologies in bridge health monitoring is gaining increasing attention due to their ability to overcome conventional approaches’ limitations. This study proposes a bridge damage identification method for simply supported bridges, leveraging output‐only vehicle‐induced vibration responses, eliminating the need for ...
Md. Niamul Haque, Shohel Rana, Muhammad Tariq Chaudhary   +2 more
wiley   +1 more source

Applications of Inverse Operators to a Fractional Partial Integro-Differential Equation and Several Well-Known Differential Equations

Fractal and Fractional
This paper mainly consists of two parts: (i) We study the uniqueness, existence, and stability of a new fractional nonlinear partial integro-differential equation in Rn with three-point conditions and variable coefficients in a Banach space using inverse
Chenkuan Li, Wenyuan Liao
doaj   +1 more source

Matrix Representation of Planar Lorentz Transformations in Extended (2 + 2)‐Dimensional Spacetime

Advances in Mathematical Physics, Volume 2026, Issue 1, 2026.
A matrix formulation of Lorentz transformations restricted to planar motion is developed within an extended (2 + 2)‐dimensional spacetime framework. Focusing on inertial frames in relative motion confined to the XY‐plane, the analysis begins with radial Lorentz boosts, where the relative velocity is collinear with the spatial position vector.
Chandra Bahadur Khadka, Mohammad W. Alomari   +1 more
wiley   +1 more source

The D’Alembert Inevitability Theorem

Mathematics
We study functions satisfying the composition law F(xy)+F(x/y)=P(F(x),F(y)) with a symmetric polynomial combiner P. We prove that symmetry together with a quadratic degree bound on P forces a composition law of d’Alembert type.
Jonathan Washburn, Milan Zlatanović, Elshad Allahyarov   +2 more
doaj   +1 more source

Nonlinear d’Alembert formula for discrete pseudospherical surfaces

Journal of Geometry and Physics, 2017
21 pages, fixed typos (v3)
openaire   +4 more sources

Research on a Rapid and Portable Measurement Method of Oil Density Based on Asynchronous Free Resonance

Journal of Sensors, Volume 2026, Issue 1, 2026.
In response to the demand for rapid and portable measurement of oil density, this article establishes a full‐period vibration model including the transient excitation stage and the free attenuation stage based on the fluid inertia effect and viscous dissipation effect.
Kun Zhang, Xu Bian, Han Yang, Wolou Zhong, Deepali   +4 more
wiley   +1 more source

Multiobjective Optimization for Torsional Stiffness of Antiroll Bar on Trucks

Shock and Vibration, Volume 2026, Issue 1, 2026.
The antiroll bar (ARB) plays an important role in reducing the rollover phenomenon and uneven load distribution between the wheels on an axle, thus enhancing the safety and roll stability of vehicles. This study proposes a method for optimizing the torsional stiffness of the ARB on trucks, with three main objectives: (1) building a general model of a ...
Ngo Van Dung, Van Tan Vu, Truong Manh Hung, Do Trong Tu, Marco Civera   +4 more
wiley   +1 more source

Uniqueness of the Canonical Reciprocal Cost

Mathematics
We study a rigidity problem for functions F:R>0→R≥0 that penalize deviation of a positive ratio from equilibrium x=1. Assuming (i) a d’Alembert-type composition law on R>0, and (ii) a single quadratic calibration at the identity (in logarithmic ...
Jonathan Washburn, Milan Zlatanović
doaj   +1 more source