Results 131 to 140 of about 1,686 (292)

SPLINE COLLOCATION METHOD FOR WEAKLY SINGULAR INTEGRAL EQUATIONS

Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 1999
Arvet Pedas, Gennadi Vainikko
openaire   +2 more sources

Strain Engineering of Magnetoresistance and Magnetic Anisotropy in CrSBr

Advanced Materials, EarlyView.
Biaxial compressive strain significantly enhances magnetoresistance and critical saturation fields in thin flakes of the 2D magnet CrSBr, along all three crystallographic axes. First‐principles calculations link these effects to strain‐induced increases in exchange interactions and magnetic anisotropy.
Eudomar Henríquez‐Guerra, Alberto M. Ruiz, Marta Galbiati, Álvaro Cortés‐Flores, Daniel Brown, Esteban Zamora‐Amo, Lisa Almonte, Andrei Shumilin, Juan Salvador‐Sánchez, Ana Pérez‐Rodríguez, Iñaki Orue, Andrés Cantarero, Andres Castellanos‐Gomez, Federico Mompeán, Mar Garcia‐Hernandez, Efrén Navarro‐Moratalla, Enrique Diez, Mario Amado, José J. Baldoví, M. Reyes Calvo   +19 more
wiley   +1 more source

Numerical Solutions of Fractional Weakly Singular Two-Dimensional Partial Volterra Integral Equations Using Euler Wavelets

Mathematics
This paper presents an innovative numerical method for solving two-dimensional weakly singular Volterra integral equations, including fractional Volterra integral equations with weak singularities.
Seyed Sadegh Gholami, Ali Ebadian, Amirahmad Khajehnasiri, Kareem T. Elgindy   +3 more
doaj   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Approximations for Singular Integral Equations [PDF]

, 1999
This work is a numerical study of a class of weakly singular neutral equations. The motivation for this study is an aeroelastic system. Numerical techniques are developed to approximate the singular integral equation component appearing in the complete ...
Herdman, Darwin T.
core  

Numerical Solution of Integral-Algebraic Equations with Weakly Singular Kernels by k−step Methods

Известия Иркутского государственного университета: Серия "Математика", 2015
In this paper we describe numerical methods for solution integral-algebraic equations wiht weakly singular kernels. Methods are based on explicit Adam’s methods, product integration methods for the integral part and on extrapolation formulas for the main
M.V. Bulatov, O.S. Budnikova
doaj  

Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet

Advanced Materials, EarlyView.
Chiral graphene nanoribbons on a ferromagnetic gadolinium‐gold surface alloy display tunable spin and charge states at their termini. Atomic work function variations and exchange fields enabe transitions between singlet, doublet, and triplet configurations.
Leonard Edens, Francisco Romero‐Lara, Trisha Sai, Kalyan Biswas, Manuel Vilas‐Varela, Thomas Frederiksen, Diego Peña, Fabian Schulz, Jose Ignacio Pascual   +8 more
wiley   +1 more source

Solvent‐Free Thermal Defect Engineering in Molecular Frameworks With Volatile Linkers

Advanced Materials, EarlyView.
Thermal removal of neutral volatile linkers enables precise and solvent‐free generation of metal vacancies in MOFs. This strategy affords redox‐stable, coordinatively unsaturated FeII sites with tunable spin, ligand coordination, and catalytic behavior. The approach offers a general route to design defect‐functional materials through local coordination
Sonia Martínez‐Giménez, Alejandro Orellana‐Silla, Marta Galbiati, Efrén Navarro‐Moratalla, Luca Braglia, Sara Stolfi, José Antonio Real, Víctor Rubio‐Giménez, Sergio Tatay, Carlos Martí‐Gastaldo   +9 more
wiley   +1 more source

Numerical quadrature methods for integrals of singular periodic functions and their application to singular and weakly singular integral equations [PDF]

, 1986
High accuracy numerical quadrature methods for integrals of singular periodic functions are proposed. These methods are based on the appropriate Euler-Maclaurin expansions of trapezoidal rule approximations and their extrapolations.
Israeli, M., Sidi, A.
core   +1 more source

A novel approach for solving weakly singular fractional integro-differential equations

Partial Differential Equations in Applied Mathematics
In this essay, we introduce a novel idea to tackle the challenges of fractional integro-differential equations (FIDEs) featuring weakly singular kernels (WSKs). New idea leverages B-splines for solving such equations, offering a robust numerical solution
Ali Jalal Ali, Mostafa Eslami, Ali Tavakoli   +2 more
doaj   +1 more source