Results 71 to 80 of about 10,996,377 (201)

The Political Economy of Attention: Media Salience, Voter Cognition, and Electoral Accountability

Journal of Economic Surveys, Volume 40, Issue 3, Page 1173-1193, July 2026.
ABSTRACT We review conceptual and empirical contributions to the political economy of attention, with a focus on how attention allocation shapes political behavior and electoral accountability. The review distinguishes between endogenous (goal‐directed) and exogenous (stimulus‐driven) attention and examines how these concepts are incorporated into ...
Patrick Balles, Ulrich Matter, Alois Stutzer   +2 more
wiley   +1 more source

Chaotic Behaviors and Coexisting Attractors in a New Nonlinear Dissipative Parametric Chemical Oscillator

Complexity, 2022
In this study, complex dynamics of Briggs–Rauscher reaction system is investigated analytically and numerically. First, the Briggs–Rauscher reaction system is reduced into a new nonlinear parametric oscillator.
Y. J. F. Kpomahou, A. Adomou, J. A. Adéchinan, A. E. Yamadjako, I. V. Madogni   +4 more
doaj   +1 more source

Imminent Localized Precipitation Preceded by a Surge in Cloud‐Base Descent and Reflectivity

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The nowcasting of localized precipitation (LP) is often limited by insufficient observation of the vertical cloud evolution preceding rainfall. Here we systematically tracked rapid cloud development within 2 hr before LP onset, utilizing cloud data collected in 2024 from the millimeter‐wavelength cloud radar network across China, together with
Zhen Zhang, Jianping Guo, Ning Li, Jianbo Deng, Weilong Deng, Yuping Sun, Yifei Wang, Shuairu Jiang, Liping Zeng, Feng Ma, Tianmeng Chen   +10 more
wiley   +1 more source

Melnikov’s method and Arnold diffusion for perturbations of integrable Hamiltonian systems [PDF]

Journal of Mathematical Physics, 1982
We start with an unperturbed system containing a homoclinic orbit and at least two families of periodic orbits associated with action angle coordinates. We use Kolmogorov–Arnold–Moser (KAM) theory to show that some of the resulting tori persist under small perturbations and use a vector of Melnikov integrals to show that, under suitable hypotheses ...
Holmes, Philip J., Marsden, Jerrold E.
openaire   +2 more sources

Unlocking Heterobimetallic Architectures in a Symmetric PNNP Ligand Environment

Chemistry – A European Journal, Volume 32, Issue 21, 1 June 2026.
A symmetric PNNP ligand enables the modular assembly of heterobimetallic ZnRu and CoRu complexes from a mononuclear Ru(II) precursor. Ligand deprotonation triggers dearomatization and contraction of the metal–metal distance. Combined DFT and QTAIM analyses reveal metallophilic interaction in CoRu but not in ZnRu, highlighting controllable geometric and
Stanislav Melnikov, Menne W. P. Verkooijen, Jop Verduin, Martin Lutz, Daniël L. J. Broere   +4 more
wiley   +1 more source

The Role of Social Media in Aesthetic Medicine Education ‐ A Global Analysis of Publication Habits and Scientific Impact

Journal of Cosmetic Dermatology, Volume 25, Issue 6, June 2026.
ABSTRACT Background Aesthetic medicine is rapidly expanding, yet lack of standardized educational pathways led many healthcare providers (HCPs) to rely on social media influencers for education. The scientific validity of the information shared, however, remains uncertain.
Giovanni Buzzaccarini, Victor R. M. Munoz‐Lora, Marcelo Germani, Pietra Roschel Borba, Mariana Shimizu, Anezka Juniese Albornoz Barraza, Martin Rodrigo Sepúlveda Candia, Sergio Escobar, Kristina Davidovic, Dmitry V. Melnikov, Carlos Bravo, Ishaan Ramkisson, Marco Borin, Giulio Nittari, Rebecca Susanna Degliuomini, Sebastian Cotofana   +15 more
wiley   +1 more source

Poincar'e-Melnikov-Arnold method for analytic planar maps

, 1996
. The Poincar'e-Melnikov-Arnold method for planar maps gives rise to a Melnikov function defined by an infinite and (a priori) analytically uncomputable sum.
Amadeu Delshams, Departament De Matem`atica Aplicada I   +1 more
core  

Digital Roots or Digital Routes? Broadband Expansion and the Rural‐Urban Migration in China

Population and Development Review, Volume 52, Issue 2, Page 374-402, June 2026.
Abstract This study investigates how broadband internet affects rural–urban migration in China using the Universal Broadband and Telecommunication Services pilot program launched in 2015 as a quasi‐experimental setting. Analyzing China Household Finance Survey data (2013–2021) with difference‐in‐differences estimation, we find that improved internet ...
Shuang Ma, Ren Mu
wiley   +1 more source

Singular separatrix splitting and the Poincare-Melnikov method for area preserving maps [PDF]

, 1999
The splitting of separatrices of area preserving maps close to the identity is one of the most paradigmatic examples of an exponentially small or singular phenomenon.
Delshams Valdés, Amadeu, Ramírez Ros, Rafael   +1 more
core   +2 more sources

Nonlinear Dynamic Analysis and Chaos Prediction of Grinding Motorized Spindle System

Shock and Vibration, 2019
The paper determines the impact factors of dynamics of a motorized spindle rotor system due to high speed: centrifugal force and bearing stiffness softening.
Weitao Jia, Feng Gao, Yan Li, Wenwu Wu, Zhongwei Li   +4 more
doaj   +1 more source