Results 41 to 50 of about 641,361 (342)

On damping created by heterogeneous yielding in the numerical analysis of nonlinear reinforced concrete frame elements

open access: yes, 2015
In the dynamic analysis of structural engineering systems, it is common practice to introduce damping models to reproduce experimentally observed features.
Cottereau, Régis, Jehel, Pierre
core   +3 more sources

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

open access: yesFEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

A robust fusion bus frequency estimation method to improve frequency oscillation damping in power systems

open access: yesIET Generation, Transmission & Distribution, 2023
This paper proposes a new robust method for accurately and reliably estimating remote bus frequencies in a power system. Two different measurement sources for the remote bus frequency are considered, that is, the ideal Frequency Divider (FD) and the ...
Ali Farahani   +3 more
doaj   +1 more source

Linear Matrix Inequality Approach to Designing Damping and Tracking Control for Nanopositioning Application

open access: yesVibration, 2022
This paper presents a method to extend the eigenstructure assignment based design of the Positive Position Feedback (PPF) damping controller to the family of well-known second-order Positive Feedback Controllers (PFC) namely: (i) the Positive Velocity ...
Adedayo K. Babarinde, Sumeet S. Aphale
doaj   +1 more source

Natural Products as Geroprotective Modulators in Diabetic Nephropathy: A Mechanistic Framework Integrating Aging Hallmarks and the AMPK–SIRT1–Nrf2 Axis

open access: yesAging and Cancer, EarlyView.
Natural products target the aging kidney in diabetic nephropathy by restoring the AMPK–SIRT1–Nrf2 axis, reducing oxidative stress, inflammation, fibrosis, and cellular senescence while enhancing mitochondrial biogenesis and antioxidant defenses.
Sherif Hamidu   +8 more
wiley   +1 more source

Development of a new tuned vibration absorber based on one degree-of-freedom of translational motion

open access: yesCogent Engineering, 2021
The study has proposed a newly tuned vibration absorber (TVA) based on one degree-of-freedom (1DOF) of translational motion. The absorber mass takes the shape of a tank filled with fluid.
Abobakr Almashhor, Saeed A. Asiri
doaj   +1 more source

Dynamical depinning of chiral domain walls [PDF]

open access: yes, 2017
The domain wall depinning field represents the minimum magnetic field needed to move a domain wall, typically pinned by samples' disorder or patterned constrictions.
Martinez, Eduardo   +2 more
core   +3 more sources

Damping Property of Cement Mortar Incorporating Damping Aggregate [PDF]

open access: yesMaterials, 2020
This study proposes a new cement mortar incorporating damping aggregate (DA) and investigates the mechanical properties and damping property of the cement mortar. Four types of DA were prepared, lightweight aggregate presaturated water and three types of polymer emulsion.
Yaogang Tian   +4 more
openaire   +2 more sources

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +1 more source

Damping of low-energy excitations of a trapped Bose condensate at finite temperatures

open access: yes, 1997
We present the theory of damping of low-energy excitations of a trapped Bose condensate at finite temperatures, where the damping is provided by the interaction of these excitations with the thermal excitations.
A. Smerzi   +36 more
core   +1 more source

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