Results 21 to 30 of about 560,074 (240)

Coupling Nonlinear Sigma-Matter to Yang-Mills Fields: Symmetry Breaking Patterns [PDF]

open access: yes, 2008
We extend the traditional formulation of Gauge Field Theory by incorporating the (non-Abelian) gauge group parameters (traditionally simple spectators) as new dynamical (nonlinear-sigma-model-type) fields.
Aldaya V   +9 more
core   +5 more sources

Sustainability-driven model for predicting compressive strength in concrete structures

open access: yesCogent Engineering
Over the past few decades, enhancing the sustainability of concrete structures has become a worldwide necessity. This study proposes a mathematical model for predicting compressive strength (CS), aiming to further the objective of designing sustainable ...
Fayez Moutassem, Mohamad Kharseh
doaj   +1 more source

Outline of a Generalization and a Reinterpretation of Quantum Mechanics Recovering Objectivity

open access: yes, 2015
The ESR model has been recently proposed in several papers to offer a possible solution of the problems raising from the nonobjectivity of physical properties in quantum mechanics (QM) (mainly the objectification problem of the quantum theory of ...
Garola, Claudio   +2 more
core   +1 more source

Analysis and computations for a model of quasi-static deformation of a thinning sheet arising in superplastic forming [PDF]

open access: yes, 2002
We consider a mathematical model for the quasi-static deformation of a thinning sheet. The model couples a first-order equation for the thickness of the sheet to a prescribed curvature equation for the displacement of the sheet.
Deckelnick, K   +2 more
core   +1 more source

The Standard Model as a noncommutative geometry: the low energy regime

open access: yes, 1997
We render a thorough, physicist's account of the formulation of the Standard Model (SM) of particle physics within the framework of noncommutative differential geometry (NCG). We work in Minkowski spacetime rather than in Euclidean space.
Abachi   +65 more
core   +1 more source

Constructing Parsimonious Analytic Models for Dynamic Systems via Symbolic Regression

open access: yes, 2020
Developing mathematical models of dynamic systems is central to many disciplines of engineering and science. Models facilitate simulations, analysis of the system's behavior, decision making and design of automatic control algorithms.
Ancona, Nicola   +3 more
core   +1 more source

Design and Kinematics Analysis of the Wearable Lower Limb Exoskeleton

open access: yesJixie chuandong, 2023
With the increasing proportion of people with lower limb dysfunction in the population, lower limb exoskeleton, mainly in the form of physical assisted therapy, has become a research hotspot in the field of rehabilitation. In this study, a wearable lower
Wang Xiaowei, Chen Xu, Gao Shenglu
doaj  

Numerical simulation of stratified flows usingOpenFOAM package

open access: yesТруды Института системного программирования РАН, 2018
The paper is devoted to construction of a numerical model and computations of continuously stratified fluid flows in field of external mass forces accounting for dissipative factors, viscosity and diffusion. Mathematical model is based on the fundamental
N. F. Dimitrieva, Ya. V. Zagumennyi
doaj   +1 more source

Modelling rapid mass movements using the shallow water equations in Cartesian coordinates [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2015
We propose a new method to model rapid mass movements on complex topography using the shallow water equations in Cartesian coordinates. These equations are the widely used standard approximation for the flow of water in rivers and shallow lakes, but the ...
S. Hergarten, J. Robl
doaj   +1 more source

Accommodating Taste and Scale Heterogeneity for Front-Seat Passenger’ Choice of Seat Belt Usage

open access: yesMathematics, 2021
There is growing interest in implementation of the mixed model to account for heterogeneity across population observations. However, it has been argued that the assumption of independent and identically distributed (i.i.d) error terms might not be ...
Mahdi Rezapour, Khaled Ksaibati
doaj   +1 more source

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