Results 61 to 70 of about 1,847,581 (285)
A Mathematical Model for Social Security Systems with Dynamical Systems
Ingeniería y Ciencia, 2014 In this paper it is proposed a mathematical approach based ondynamicsystems to study the effect of the increase in the Social Security normalretirement age on the worker and on the dynamics of retiree populations.In order to simplify this initial effort, the proposed model does not includesome economic variables, such as wage growth, earnings or ...
Gilberto Gonzalez-Parra +1 more
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Reconfigurable Three‐Dimensional Superconducting Nanoarchitectures
Advanced Functional Materials, EarlyView.3D superconducting nanostructures offer new possibilities for emergent physical phenomena. However, fabricating complex geometries remains challenging. Here 3D nanoprinting of complex 3D superconducting nanoarchitectures is established. As well as propagating superconducting vortices in 3D, anisotropic superconducting properties with geometric ...
Elina Zhakina +11 more
wiley +1 more source
Aspects of Poincaré’s Program for Dynamical Systems and Mathematical Physics [PDF]
Acta Applicandae Mathematicae, 2012 This article is mainly historical, except for the discussion of integrability and characteristic exponents in Sect. 2. After summarising the achievements of Henri Poincaré, we discuss his theory of critical exponents. The theory is applied to the case of three degreesof- freedom Hamiltonian systems in (1 : 2 : n)-resonance (n > 4).
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Analysis and mathematical modelling of dynamics of two tumours system
Nonlinear Analysis: Modelling and Control, 1998 Eidukevičius, Rimantas, +1 more
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Advanced Functional Materials, EarlyView.The chemical composition and band alignment are systematically investigated at the TiO2/InP heterointerface. Thin TiO2 films are deposited by ALD on atomically ordered, P‐terminated p‐InP(100). By combining UPS, XPS, and ab initio molecular dynamics, the atomistic structure and electronic alignment are revealed.
Mohammad Amin Zare Pour +11 more
wiley +1 more source
Advanced Functional Materials, EarlyView.The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner +4 more
wiley +1 more source
Chemo‐Mechanical Coupling in Hydrogels: Dynamics in the Diffusion‐Limited Regime
Advanced Functional Materials, EarlyView.A time‐dependent continuum model is developed to capture the transient swelling dynamics of chemo‐mechanical hydrogels. By coupling chemical reactions, solvent transport, and polymer deformation, volume phase transitions, reaction kinetics, and transient mechanical instabilities are analyzed.
Yao Xiong +2 more
wiley +1 more source
Theory and mathematics in building dynamic systems models: what prevails? A reply to van der Maas and Raijmakers [PDF]
, 2000 E. Saskia Kunnen +2 more
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Advanced Functional Materials, EarlyView.This study investigates optoelectronic PUFs that improve on traditional optical and electrical PUFs. The absorber materials are randomly coated through spray coating, ligand exchange, and dynamic spin coating. Incident light generates wavelength‐dependent binary multikey and enhances security ternary keys, approaching near‐ideal inter‐ and intra ...
Hanseok Seo +6 more
wiley +1 more source
Mathematical Model and FPGA Realization of a Multi-Stable Chaotic Dynamical System with a Closed Butterfly-Like Curve of Equilibrium Points [PDF]
, 2021 Aceng Sambas +7 more
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