Results 11 to 20 of about 5,548,205 (246)

Acceleration Response of the Railway Bridges - Verification of the Limit State of Acceleration

open access: yesCommunications, 2019
The dynamic response of a girder bridge under trains is studied with an emphasis on the vertical track acceleration. The vehicles are modelled as a series of moving loads.
Milan Moravcik
doaj   +2 more sources

AKR breakup and auroral particle acceleration at substorm onset [PDF]

open access: yes, 2008
The dynamical behavior of auroral kilometric radiation (AKR) is investigated in connection with auroral particle acceleration at substorm onsets using high-time-resolution wave spectrograms provided by Polar/PWI electric field observations.
Morioka, A.   +10 more
core   +4 more sources

Photon acceleration in vacuum [PDF]

open access: yes, 2006
A new process associated with the nonlinear optical properties of the electromagnetic vacuum, as predicted by quantum electrodynamics, is described. This can be called photon acceleration in vacuum, and corresponds to the frequency shift that takes place
Mendonça, J.T.   +3 more
core   +4 more sources

The Two-Stage Suspension System of the Fiber Optic Vector Hydrophone for Isolating the Vibration from the Mooring Rope

open access: yesSensors, 2022
The two-stage suspension system (TSSS) is designed for the fiber optic vector hydrophone (FOVH) to isolate the vibration from the mooring rope. The acceleration transmissibility of the TSSS is studied theoretically and experimentally.
Yichi Zhang   +5 more
doaj   +1 more source

Random Vibration Fatigue Analysis Using a Nonlinear Cumulative Damage Model

open access: yesApplied Sciences, 2022
The paper’s content allowed us to determine the fatigue life of a component that is being subjected to a random vibration environment. Its estimation is performed in the frequency domain with loading frequencies being closer to the system’s natural ...
Jesús M. Barraza-Contreras   +3 more
doaj   +1 more source

An Output-Only, Energy-Based, Damage Detection Method Using the Trend Lines of the Structural Acceleration Response

open access: yesBuildings, 2023
Using the trendlines of an acceleration response as a tool to decompose a structural response is a new topic that was proposed by authors in 2020. This paper provides a numerical/experimental investigation of using a Savitzky–Golay filter (SGF) in a ...
Hadi Kordestani, Chunwei Zhang, Ali Arab
doaj   +1 more source

Vertical evolution of auroral acceleration at substorm onset [PDF]

open access: yes, 2009
This study describes the onset process of auroral substorms in connection with the vertical evolution of auroral particle acceleration, on the basis of auroral kilometric radiation (AKR) dynamics.
Morioka, A.   +17 more
core   +2 more sources

Solar flare particle acceleration in collapsing magnetic traps [PDF]

open access: yes, 2012
Electronic redacted version excludes material for which permission has not been granted by the rights holderThe topic of this thesis is a detailed investigation of different aspects of the particle acceleration mechanisms operating in Collapsing Magnetic
Grady, Keith J.
core   +2 more sources

Comparison of response acceleration methods suggested by different standards

open access: yesYantu gongcheng xuebao, 2023
The Chinese specifications, "Code for seismic design of urban rail transit structures" and "Standard for seismic design of nuclear power plants", give two response acceleration methods for the seismic analysis of underground structures.
LIU Jingbo , LU Xihuan , BAO Xin
doaj   +1 more source

Investigation of the Head’s Dynamic Response to Boxing Punch Using Computer Simulation

open access: yesMontenegrin Journal of Sports Science and Medicine, 2021
Head injuries are dangerous injuries that are common in combat sports. Nevertheless, the mechanisms of concussion in sport have are not precisely known. Thus, this study aimed to investigate the dynamic response of the head based on linear and rotational
Neda Boroushak   +2 more
doaj   +1 more source

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