Results 61 to 70 of about 2,652,488 (196)

Maximal Swimming Speed Explains Differences in Habitat Use Among Invasive Ponto‐Caspian Dikerogammarus Species (Crustacea, Amphipoda)

Journal of Zoology, EarlyView.
The three invasive Ponto‐Caspian Dikerogammarus species (D. bispinosus, D. haemobaphes, and D. villosus) show niche differentiation along the current velocity gradient. In the present study, we experimentally measured their maximal swimming speeds to test whether they coincide with their tolerances for currents.
Milán Kerekes, James W. E. Dickey, Ádám Egri, Péter Borza   +3 more
wiley   +1 more source

Conservative finite-volume forms of the Saint-Venant equations for hydrology and urban drainage [PDF]

Hydrology and Earth System Sciences, 2019
New integral, finite-volume forms of the Saint-Venant equations for one-dimensional (1-D) open-channel flow are derived. The new equations are in the flux-gradient conservation form and transfer portions of both the hydrostatic pressure force and the ...
B. R. Hodges
doaj   +1 more source

Dual mechanisms give rise to biphasic stomatal opening in onion

New Phytologist, EarlyView.
Anisotropic guard cell wall stiffness enhances onion stomatal pore opening by increasing guard cell arc length. Summary Stomata are controllable micropores on the leaf surface that regulate gas exchange and water loss. Pore aperture adjustment is a mechanical process whereby changes in guard cell turgor drive changes in cell shape, resulting in ...
Melissa Tomkins, Matthew J. Wilson, Jodie V. Armand, Nathanael Y. H. Tan, Briony Parker, Julie E. Gray, Andrew J. Fleming, Richard J. Morris, Richard S. Smith   +8 more
wiley   +1 more source

Compression of Polyconvex Envelopes of Isotropic Functions via Monotonic Input Convex Neural Networks

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT This work presents a novel neural‐network compression approach for polyconvex envelopes of isotropic functions. The approach relies on a classical sufficient criterion for polyconvexity and is particularly suited for the representation of determinant‐constrained energy densities arising in non‐linear elasticity.
Timo Neumeier, Julian Salmon
wiley   +1 more source

Derivation and numerical approximation of hyperbolic viscoelastic flow systems: Saint-Venant 2D equations for Maxwell fluids [PDF]

, 2017
We pursue here the development of models for complex (viscoelastic) fluids in shallow free-surface gravity flows which was initiated by [Bouchut-Boyaval, M3AS (23) 2013] for 1D (translation invariant) cases.
Boyaval, Sébastien
core   +3 more sources

Modified Saint-Venant equations for flow simulation in tidal rivers

Water Science and Engineering, 2012
Flow in tidal rivers periodically propagates upstream or downstream under tidal influence. Hydrodynamic models based on the Saint-Venant equations (the SVN model) are extensively used to model tidal rivers.
Xiao-qin Zhang, Wei-min Bao
doaj   +1 more source

Establishing a time‐varying flood‐wave impulse function combined with a dynamic machine‐learning technique in response to the disturbance of boundary conditions

Journal of Flood Risk Management, 2023
To seek other alternative approaches besides numerical methods, the linearized Saint Venant equations were utilized to derive the channel response functions for simulating streamflow.
Pin‐Chun Huang
doaj   +1 more source

A Stable Formulation for Wave‐Induced Fracture in Peridynamics

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT The bond‐associated quadrature point formulation is a very accurate peridynamic formulation for elasticity, but modeling fracture by the traditional deletion of bonds can trigger severe numerical instabilities. These instabilities are most pronounced for wave‐induced fracture, where stress waves continue to propagate through already damaged ...
Kai Partmann, Manuel Dienst, Christian Wieners, Kerstin Weinberg   +3 more
wiley   +1 more source

Elimination of Spurious Modes in Reduced‐Order‐Modeling‐Based Topology Optimization of Geometrically Nonlinear Structures

International Journal for Numerical Methods in Engineering, Volume 127, Issue 20, 30 October 2026.
ABSTRACT In geometrically nonlinear topology optimization, elements with low pseudo‐densities, subjected to compression from neighboring stiffer regions, can lead to complications, such as “inside‐out” elements in 2D structures or spurious local buckling in shells and plates.
Lidan Zhang, Fred van Keulen
wiley   +1 more source

Experimental Evidence for the Impact of Copper Microstructure on Residual Stress of Through Silicon Via

Advanced Electronic Materials, Volume 12, Issue 19, 12 October 2026.
The impact of Cu microstructure on the thermomechanical residual stress of TSVs with a diameter of 3 μm$\umu{\rm m}$ is investigated by comparing Raman stress imaging and EBSD grain characterization. By correlating Raman‐imaged TSV stress with Cu grain structure, direct experimental evidence is provided to highlight the direct correlation between ...
Shuhang Lyu, Thomas Beechem, Tiwei Wei
wiley   +1 more source