Results 51 to 60 of about 19,239 (301)
On Oscillation Properties for Linear Hamiltonian Systems
Rocky Mountain Journal of Mathematics, 2009 The authors investigate oscillatory properties of the linear Hamiltonian differential system \[ x'=A(t)x+B(t)u,\quad u'=C(t)x-A^*(t)u \tag{*} \] under the assumption that the matrix \(B\) is positive definite. The main result of the paper is a statement showing that (*) is oscillatory provided \(\limsup\) of the largest eigenvalue of a certain ...
Zheng, Zhaowen, Meng, Fanwei
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Interface Effects in Ultrathin Silicon on Insulator Films
Advanced Functional Materials, EarlyView.This work establishes a systematic framework to discriminate how bulk and interface phenomena affect charge transport in ultrathin P‐doped silicon‐on‐insulator (SOI) films. For Si films below 15 nm, electrical characterization demonstrates that interface states drive charge transport, shifting the metal‐insulator transition (MIT) critical dopant ...
Andrea Pulici +8 more
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Periodic solutions of second order Hamiltonian systems with nonlinearity of general linear growth
Electronic Journal of Qualitative Theory of Differential Equations, 2021 In this paper we consider a class of second order Hamiltonian system with the nonlinearity of linear growth. Compared with the existing results, we do not assume an asymptotic of the nonlinearity at infinity to exist. Moreover, we allow the system to be
Guanggang Liu
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Construction of a linear K-system in Hamiltonian Floer theory
, 2022 © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.The notion of linear K-system was introduced by the present authors as an abstract model arising from the structure of compactified moduli spaces of solutions to Floer’s ...
Oha, Hiorshi +6 more
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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 +19 more
wiley +1 more source
On fermionic models of a closed ecosystem with application to bacterial populations
Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2016 This paper deals with the application of operatorial techniques of quantum physics to a theoretical model of closed ecosystems. The model is built by using fermionic operators whose evolution is ruled by a self--adjoint Hamiltonian operator.
Rosa Di Salvo, Francesco Oliveri
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Rayleigh principle for time scale symplectic systems and applications
Electronic Journal of Qualitative Theory of Differential Equations, 2011 In this paper we establish the Rayleigh principle, i.e., the variational characterization of the eigenvalues, for a general eigenvalue problem consisting of a time scale symplectic system and the Dirichlet boundary conditions.
Roman Simon Hilscher, V. Zeidan
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Port-Hamiltonian Mathematical Model of a Fluid Ring Attitude System
Energies, 2021 In this article, we propose a mathematical model using the port-Hamiltonian formalism for a satellite’s three-axis attitude system comprising fluid rings.
Juan Cristobal Alcaraz Tapia +2 more
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Higher-order linear lossless systems
, 2008 We define a lossless autonomous system as one having a quadratic differential form associated with it called the total energy, which obeys the property of positivity and which is conserved.
Rao, Shodhan, Rapisarda, Paolo
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Advanced Materials, EarlyView.AI‐Assisted Workflow for (Scanning) Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling. Abstract (Scanning) transmission electron microscopy ((S)TEM) has significantly advanced materials science but faces challenges in correlating precise atomic structure information with the functional properties of ...
Marc Botifoll +19 more
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