Results 41 to 50 of about 1,050 (195)
Portal Hypertension &Cirrhosis, EarlyView.As the hepatic venous pressure gradient (HVPG) remains the current gold standard for diagnosing portal hypertension in cirrhosis, its clinical application is limited by invasiveness, high cost, and restricted availability. Given the urgent need for noninvasive techniques to dynamically monitor portal vein pressure (PVP), contrast‐enhanced ...
Danping Huang +5 more
wiley +1 more source
A local defect resonance for linear and nonlinear ultrasonic thermography [PDF]
, 2014 An efficient wave-defect interaction is the key to a high thermal response of flaws in ultrasonic thermography. To selectively enhance defect vibrations a concept of local defect resonance is developed and applied to ultrasonic activation of defects ...
Solodov, I., Rahammer, M., Busse, G.
core +1 more source
Emergent phenomena in locally resonant acoustic metamaterials due to subharmonic energy exchange
, 2022 This work investigates the emergent phenomena in non-linear locally resonant elasto-acoustic metamaterials. The energy exchange between the propagative and subharmonic evanescent wave modes is studied, which has been shown to originate from the ...
Zega V. +4 more
core +2 more sources
Remote Sensing in Ecology and Conservation, EarlyView.Cycles of dieback and recovery drove mangrove forest dynamics at the Albert and Leichhardt Rivers (Gulf of Carpentaria, Queensland, Australia) over 36 years (1987–2023). Landward margins were the most affected by reduced tidal inundation when the alignment of low lunar declination suppressed tidal range and extreme El Niño phases lowered mean sea level.
Rogerio Victor S. Gonçalves +4 more
wiley +1 more source
Phase resonance nonlinear modes of mechanical systems
, 2021 peer reviewedThe resonances of forced dynamical systems occur when either the amplitude of the frequency response undergoes a local maximum (amplitude resonance) or phase lag quadrature takes places (phase resonance).
Volvert, Martin, Kerschen, Gaëtan
core +1 more source
Journal of Applied Mathematics, 2012 A multi-degree-of-freedom dynamical system with local cubic nonlinearities subjected to super/subharmonic excitation is considered in this paper. The purpose of this paper is to approximate the nonlinear response of system at super/sub harmonic resonance.
Yang CaiJin
doaj +1 more source
A new in silico model to precisely design focused ultrasound brain therapies
Medical Physics, Volume 53, Issue 7, July 2026.Abstract Background Focused ultrasound (FUS) combined with microbubbles enables transient and noninvasive blood–brain barrier (BBB) opening, facilitating targeted drug delivery. However, accurate treatment planning remains difficult due to inter‐patient anatomical variability and the common assumption in simulations that brain tissues behave like water.
Allegra Conti +4 more
wiley +1 more source
Field Observations of Intermittent Cross‐Shore Bed Load Transport on a Low‐Energy Beach
Journal of Geophysical Research: Oceans, Volume 131, Issue 6, June 2026.Abstract Low‐energy sandy beaches typically have a rippled bed, and the presence of bed forms can strongly affect net sediment transport rates under combined forcing of waves and currents. In case low‐energetic forcing is combined with coarse sediment, bed load transport is an important mechanism to understand transport processes on such beaches.
Marlies van der Lugt +5 more
wiley +1 more source
Harmonic and subharmonic acoustic wave generation in finite structures
, 2006 The generation of harmonic and subharmonic vibrations is considered in a finite monodimensional structure, as it is produced by the nonlinear acoustic characteristics of the medium.
GERMANO, Massimo +3 more
core +1 more source
Cohomogeneity‐one solitons in Laplacian flow: Local, smoothly‐closing and steady solitons
Journal of the London Mathematical Society, Volume 113, Issue 6, June 2026.Abstract We initiate a systematic study of cohomogeneity‐one solitons in Bryant's Laplacian flow of closed G2$\text{G}_2$‐structures on a 7‐manifold, motivated by the problem of understanding finite‐time singularities of that flow. Here, we focus on solitons with symmetry groups Sp(2)${\rm Sp}(2)$ and SU(3)${\rm SU}(3)$; in both cases, we prove the ...
Mark Haskins, Johannes Nordström
wiley +1 more source