Results 71 to 80 of about 114,337,738 (295)

Dynamics of a rolling disc with an inclined sliding support

Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2021
Background. Nonholonomic mechanical systems can be models of various technical and robotic devices. Taking into account modern trends, the relevance of the study of nonholonomic systems is obvious and indisputable.
E.A. Mikishanina
doaj   +1 more source

Governance Drivers of Fossil Fuel Divestment: Evidence From Global Banks

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Climate change poses increasing transition risks for the banking sector, as financial institutions remain exposed to fossil fuel activities despite growing sustainability commitments. This study examines whether corporate governance influences banks' decisions to adopt fossil fuel divestment policies.
Rosella Carè, Massimiliano Cerciello, Nathalie Lévy, Simone Taddeo   +3 more
wiley   +1 more source

A Spectral Galerkin Framework for the Fractional Reaction–Subdiffusion Equation Using Legendre Cardinal Functions

Mathematics
In this work, we introduce an efficient spectral Galerkin method for solving one-dimensional time-fractional reaction–subdiffusion equations. Traditional fractional operators often pose severe computational challenges and exhibit weak singularities near ...
Haifa Bin Jebreen
doaj   +1 more source

High-speed algorithm for carrier frequency recovery and frame synchronization in QPSK-modulated modems

Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2018
When demodulating signals in communication systems with QPSK modulation operating in the pulsed mode, the following problems arise: rapid elimination of the reference oscillator phase ambiguity and ensuring reliable frame synchronization for a given ...
A. V. Sadchenko, O. A. Kushnirenko, E. K. Koshelev, V. I. Bondar   +3 more
doaj   +1 more source

Near optimal angular quadratures for polarised radiative transfer

, 2020
In three-dimensional (3D) radiative transfer (RT) problems, the tensor product quadratures are generally not optimal in terms of the number of discrete ray directions needed for a given accuracy of the angular integration of the radiation field.
Javier Trujillo Bueno, Jiří Štěpán, Jaume Jaume Bestard   +2 more
core   +1 more source

A Code‐Invariant QSG–VGA Co‐Design Methodology for Compact CMOS Vector‐Sum Phase Shifters

International Journal of Circuit Theory and Applications, EarlyView.
A circuit‐level co‐design methodology for compact vector‐sum phase shifters is presented, combining a code‐invariant common‐gate variable‐gain amplifier (VGA) with a resistorless quadrature signal generator (QSG). By maintaining an almost constant input resistance, explicit resistors are eliminated from the QSG.
Uxua Esteban Eraso, Carlos Sánchez‐Azqueta, Francisco Aznar, Concepción Aldea, Santiago Celma   +4 more
wiley   +1 more source

Lotka-Volterra systems integrable in quadratures

, 2008
Hamiltonian n-dimensional Lotka–Volterra systems are introduced that have n−1 conserved quantities.
YUKAWA, Tetsuyuki, BOGOYAVLENSKIJ, Oleg, 湯川, 哲之, ITOH, Yoshiaki   +3 more
core   +1 more source

Numerical quadratures for singular and hypersingular integrals [PDF]

, 2001
We present a procedure for the design of high-order quadrature rules for the numerical evaluation of singular and hypersingular integrals; such integrals are frequently encountered in solution of integral equations of potential theory in two dimensions ...
Kolm, P, Rokhlin, V
core   +1 more source

Coupling Fluid Neutrals to Gyrokinetic Plasma Dynamics for Edge and SOL Turbulence Simulations

Contributions to Plasma Physics, EarlyView.
ABSTRACT Accurate modeling of turbulent transport in magnetic confinement fusion devices requires extending first‐principles gyrokinetic simulations from the core to the edge and scrape‐off layer (SOL), where additional physics—particularly plasma–neutrals interactions—must be included.
Sabine Ogier‐Collin, Philipp Ulbl, Wladimir Zholobenko, Frank Jenko   +3 more
wiley   +1 more source

Improved Conservative Scheme for Lenard‐Bernstein Collisions in Gyrokinetic Turbulence Simulations

Contributions to Plasma Physics, EarlyView.
ABSTRACT Turbulence in the edge and scrape‐off layer regions plays a critical role for the performance of future magnetic confinement fusion power plants. Gyrokinetic simulations allow studying this regime with high fidelity. A key aspect in these regions is the high concentration of impurities, which can radiate energy, leading to significant losses ...
Andrew Ivan Sulimro, Philipp Ulbl, Jordy Trilaksono, Frank Jenko   +3 more
wiley   +1 more source