Results 61 to 70 of about 63,372 (284)

A G-Modified Helmholtz Equation with New Expansions for the Earth’s Disturbing Gravitational Potential, Its Functionals and the Study of Isogravitational Surfaces

AppliedMath
The G-modified Helmholtz equation is a partial differential equation that enables us to express gravity intensity g as a series of spherical harmonics having radial distance r in irrational powers.
Gerassimos Manoussakis
doaj   +1 more source

A Regularization Method to Solve a Cauchy Problem for the Two-Dimensional Modified Helmholtz Equation

Mathematics, 2019
In this paper, the ill-posed problem of the two-dimensional modified Helmholtz equation is investigated in a strip domain. For obtaining a stable numerical approximation solution, a mollification regularization method with the de la Vallée Poussin ...
Shangqin He, Xiufang Feng
doaj   +1 more source

Molecular Cross‐Linking of MXenes: Tunable Interfaces and Chemiresistive Sensing

Advanced Functional Materials, EarlyView.
In this study, Ti3C2Tx MXenes are initially functionalized using oleylamine ligands to form stable dispersions in an organic solvent. Subsequently ligand exchange with α,ω‐diaminoalkanes enables cross‐linking, along with precise tuning of interfaces. This structural control translates into tunable charge transport and responsive VOC sensing, showing ...
Yudhajit Bhattacharjee, Lukas Mielke, Mahmoud Al‐Hussein, Shivam Singh, Karen Schaefer, Borja Rodriguez‐Barea, Qiong Li, Anik Kumar Ghosh, Artur Erbe, Carmen Herrmann, Yana Vaynzof, Andreas Fery, Hendrik Schlicke   +12 more
wiley   +1 more source

An efficient quarter-sweep modified SOR iterative method for solving helmholtz equation [PDF]

, 2012
The aim of this article is to describe the formulation of quarter-sweep Modified Successive Over-relaxation (QSMSOR) method using the finite difference approach for solving two-dimensional Helmholtz equation.
Jumat Sulaiman, Mohamed Othman, Mohamed Suleiman, Mohd Kamalrulzaman Md Akhir, Zanariah Abdul Majid   +4 more
core  

Potential-density pairs for axisymmetric galaxies: the influence of scalar fields

, 2005
We present a formulation for potential-density pairs to describe axisymmetric galaxies in the Newtonian limit of scalar-tensor theories of gravity.
A. Aguirre, A.G. Riess, A.G. Riess, B. Boisseau, C.L. Bennett, D. Jackson, D.H. Eckhardt, E. Fischbach, E. M. De la Calleja, E.W. Kolb, G. Efstathiou, J. Binney, J. F. Tlapanco, J.P. Ostriker, Jorge L. Cervantes-Cota, L. Amendola, M. A. Rodríguez-Meza, M. I. Pedraza, M.A. Rodríguez-Meza, M.B. Green, P. de Bernardis, R.H. Sanders, R.R. Caldwell, S. Perlmutter, T. Helbig, T. Matos, Y. Fujii, Y. Fujii   +27 more
core   +1 more source

Integrative Approaches for DNA Sequence‐Controlled Functional Materials

Advanced Functional Materials, EarlyView.
DNA is emerging as a programmable building block for functional materials with applications in biomimicry, biochemical, and mechanical information processing. The integration of simulations, experiments, and machine learning is explored as a means to bridge DNA sequences with macroscopic material properties, highlighting current advances and providing ...
Aaron Gadzekpo, Ewa Anna Oprzeska‐Zingrebe, Mariana Kozlowska, Lennart Hilbert, Iliya D. Stoev   +4 more
wiley   +1 more source

DBEM solutions to modified Helmholtz problems for FGMs of space–time-dependent properties

Results in Physics
A combined Laplace transform (LT) and domain-boundary element method (DBEM) are utilized to obtain numerical solutions for a spatio-temporal coefficient modified Helmholtz-type equation with arbitrary initial conditions and source terms, addressing ...
Mohammad Ivan Azis
doaj   +1 more source

Landweber iterative regularization method for identifying the unknown source of the modified Helmholtz equation

Boundary Value Problems, 2017
In this paper, we consider the inverse problem of identifying the unknown source for the modified Helmholtz equation. We propose the Landweber iterative regularization method to solve this problem and obtain the regularization solution.
Fan Yang, Xiao Liu, Xiao-Xiao Li
doaj   +1 more source

Inverse mean value property of solutions to the modified Helmholtz equation

St. Petersburg Mathematical Journal, 2022
A theorem characterizing balls in the Euclidean space R m \mathbb {R}^m analytically is proved. For this purpose, positive solutions of the modified Helmholtz equation are applied instead of harmonic functions used in previous results.
openaire   +3 more sources

Encoding Magnetic Anisotropies in Digital Light Processing 3D Printing

Advanced Functional Materials, EarlyView.
A hybrid magnetic device—combining a coaxial coil within a nested Halbach array—is presented, integrated into a DLP 3D printer to enable spatially resolved magnetic field control. This system enables complex, multimodal responses by programming liquid crystal elastomer resins for magnetic and thermal actuation, and by inducing electrically conductive ...
Eléonore Aïdonidis, Andrea Cosola, Pierre Bourdon, Hichem Dammak, Marco Sangermano, Frédéric Demoly, Marco Faustini, Amélie Pérot, Didier Lairez, Rakine Mouhoubi, Sébastien Blanquer, Giancarlo Rizza   +11 more
wiley   +1 more source