Results 141 to 150 of about 2,343 (229)

Mechanical Vibration Damping and Compression Properties of a Lattice Structure. [PDF]

Materials (Basel), 2021
Monkova K, Vasina M, Zaludek M, Monka PP, Tkac J.   +4 more
europepmc   +1 more source

Attractors and upper semicontinuity for an extensible beam with nonlocal structural damping

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, Volume 106, Issue 2, February 2026.
Abstract We analyze the asymptotic behavior of a class of extensible beam models governed by a nonlocal structural damping mechanism of the form φ(El)(−Δ)βut$\varphi (E_l)(-\Delta)^{\beta }u_t$, where β∈λ=(0,1]$\beta \in \lambda =(0,1]$. The coefficient φ$\varphi$ is a degenerate C1$C^{1}$‐function depending on the linear energy El$E_l$ of the system ...
Zayd Hajjej, Yanan Li, Vando Narciso, Yue Sun   +3 more
wiley   +1 more source

Statistical Characteristics of Electron Precipitation During HSS‐ and ICME‐Driven Storms Observed by the EISCAT Radar

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The 1–100 keV electron precipitation during storm time has been studied by applying the updated ELSPEC inversion method to field‐aligned electron density profiles measured by the EISCAT Tromsø radar at L = 6.5. The statistical properties of peak energy, total energy flux, and total number flux as a function of MLT have been studied for the two
N. M. Ellahouny, A. T. Aikio, I. I. Virtanen, H. Vanhamäki, L. Cai, M. N. Pedersen, H. W. Tesfaw   +6 more
wiley   +1 more source

Ionosphere‐Thermosphere Coupling in the Northern Polar Region During the May 2024 Geomagnetic Superstorm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The May 2024 superstorm, as the most intense geomagnetic storm since 2003, caused a variety of disturbances in the magnetosphere‐ionosphere‐thermosphere system. This study investigates the long‐lasting electron density depletion in the polar region and the underlying ionosphere‐thermosphere coupling, based on a comprehensive set of ...
Lei Cai, Anita Aikio, G. P. Geethakumari, Heikki Vanhamäki, I. I. Virtanen, Shin‐ichiro Oyama, Yongliang Zhang, Jiaojiao Zhang, Marc Hairston   +8 more
wiley   +1 more source

Origin of the Bulge Topography Within Caloris Basin, Mercury

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Caloris basin on Mercury has a massive circular bulge topography imprinted with unique fault sets. A variety of deformational processes have been proposed to have influenced their formation, including both global contraction and basin evolution, as well as the deposition and weight of the volcanic infill.
G. Schmidt, V. Galluzzi, A. Sepe, S. Buoninfante, B. De Toffoli, L. Ferranti, P. Palumbo   +6 more
wiley   +1 more source

Disappearance of peculiarly large atomic displacement in the high‐temperature phase of magnetite with substitution of Fe2+ by Ni2+ and Mn2+

Acta Crystallographica Section B, Volume 82, Issue 1, Page 98-107, February 2026.
Structures of Fe2.992O4 (magnetite), Fe3–x–yMnx□yO4 (x ≤ 0.980) and Fe3–x–yNix□yO4 (x ≤ 0.513, □ denotes point defects) are examined at room temperature. The observed disappearance of peculiarly large mean‐square displacement at the B site along the 3 axis in [111] is interpreted as a disappearance of phonons interact with electrons in the high ...
Takumi Kitamura, Takahiro Niimi, Hiroki Okudera   +2 more
wiley   +1 more source

Cretaceous lacewing larvae with binocular vision demonstrate the convergent evolution of sophisticated simple eyes

Insect Science, Volume 33, Issue 1, Page 441-452, February 2026.
We report three ca. 100 million‐year‐old lacewing larvae with extraordinarily large stemmata. One of them additionally has a very wide head, which represents a previously unknown morphology. The arrangement of the stemmata indicates stereoscopic vision in these predatory larvae.
Carolin Haug, Florian Braig, Simon J. Linhart, Derek E. G. Briggs, Roland R. Melzer, Alejandro Caballero, Yanzhe Fu, Gideon T. Haug, Marie K. Hörnig, Joachim T. Haug   +9 more
wiley   +1 more source

Schur convexity of the generalized geometric Bonferroni mean and the relevant inequalities. [PDF]

J Inequal Appl, 2018
Shi HN, Wu SH.
europepmc   +1 more source

Observer‐Based Stabilization of Positive Linear System With Disturbances

International Journal of Robust and Nonlinear Control, Volume 36, Issue 2, Page 732-746, 25 January 2026.
ABSTRACT This article addresses the disturbance rejection and output stabilization control of positive linear systems. First, two disturbance observers (DOs) are proposed to estimate actuator‐channel and sensor‐channel disturbances, while a positive state observer is designed for state estimation.
Changsheng Zhou, Bohao Zhu, Xiaoqi Song, Jason Jinrong Liu, Yukang Cui, James Lam   +5 more
wiley   +1 more source

Microlayer Model: A Nonlinear Finite Strain Viscoelastoplastic Formulation for Asphalt

International Journal for Numerical Methods in Engineering, Volume 127, Issue 1, 15 January 2026.
ABSTRACT The microlayer framework is an innovative and powerful approach for the numerical simulation of heterogeneous materials, such as aggregate‐matrix composites across multiple scales. In this study, the microlayer framework is extended for the first time to account for viscoelastic‐elastoplastic material behavior.
Marcel May, Jakob Platen, Erik Kamratowsky, Gustavo Canon Falla, Ines Wollny, Alexander Zeißler, Michael Kaliske   +6 more
wiley   +1 more source