Results 51 to 60 of about 645,639 (341)

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

, 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, C. C. Bradley, D. A. Huse, D. S. Jin, D. S. Jin, E. A. Shapoval, E. P. Wigner, E. P. Wigner, F. J. Dyson, F. J. Dyson, F. J. Dyson, G. Lǔders, G. V. Shlyapnikov, J. Javanainen, J. T. M. Walraven, K. B. Davis, K. G. Singh, L. P. Gor'kov, L. P. Pitaevskii, L. You, M. Edwards, M. Fliesser, M. Fliesser, M. H. Anderson, M.-O. Mewes, P. O. Fedichev, P. R. de Gennes, P. Szepfalusy, P. Öhberg, S. Stringari, S. T. Beliaev, V. M. Perez-Garcia, V. N. Popov, V. V. Goldman, W. Vincent Liu, Y. Castin, Yu. Kagan   +36 more
core   +1 more source

Constraint damping for the Z4c formulation of general relativity [PDF]

, 2012
One possibility for avoiding constraint violation in numerical relativity simulations adopting free-evolution schemes is to modify the continuum evolution equations so that constraint violations are damped away. Gundlach et. al.
Andreas Weyhausen, B. Gustafsson, David Hilditch, Sebastiano Bernuzzi   +3 more
core   +2 more sources

Enabling Digital Continuity in Virtual Manufacturing for Eco‐Efficiency Assessment of Lightweight Structures by Means of a Domain‐Specific Structural Mechanics Language: Requirements, Idea and Proof of Concept

Advanced Engineering Materials, EarlyView.
This article presents a solver‐agnostic domain‐specific language (DSL) for computational structural mechanics that strengthens interoperability in virtual product development. Using a hierarchical data model, the DSL enables seamless exchange between diverse simulation tools and numerical methods.
Martin Rädel, Andreas Schuster, Felix Schoenitz, Jean Lefèvre   +3 more
wiley   +1 more source

Research on the Influence of the Mounting Configuration on the Elastic Characteristics and Energy Dissipation Capacity of Multi-Leaf Springs for Truck Vehicles

Energies
This paper presents selected results of experimental tests on multi-leaf springs used in the dependent suspensions of trucks. The main objective of this research was to determine the dissipation energy in the actual spring structure for various methods ...
Wieslaw Krason, Pawel Bogusz, Jozef Wysocki   +2 more
doaj   +1 more source

Non-local Gilbert damping tensor within the torque-torque correlation model

, 2017
An essential property of magnetic devices is the relaxation rate in magnetic switching which depends strongly on the damping in the magnetisation dynamics.
Eriksson, Olle, Kvashnin, Yaroslav, Pereiro, Manuel, Thonig, Danny   +3 more
core   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Zero/low overshoot conditions based on maximally‐flatness for PID‐type controller design for uncertain systems with time‐delay or zeros

IET Control Theory & Applications
This paper extends the characteristic ratio approach using novel inequalities to ensure zero/low overshoot for linear‐time‐invariant systems with zeros.
Mehmet Canevi, Mehmet Turan Söylemez
doaj   +1 more source

Influence of nonlocal damping on the field-driven domain wall motion

, 2016
We derive the complete expression of nonlocal damping in noncollinear magnetization due to the nonuniform spin current pumped by precessional magnetization and incorporate it into a generalized Thiele equation to study its effects on the dynamics of the ...
Wang, X. R., Xia, Ke, Yuan, H. Y., Yuan, Zhe   +3 more
core   +2 more sources

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

Advanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu, Giovanni Gammaitoni, Michael Häfner, Eduardo Villalobos‐Portillo, Carlo Marini, Matteo Bianchini   +5 more
wiley   +1 more source