Results 31 to 40 of about 777,151 (296)

A Study on Shock Absorption Characteristics of Honeycomb-Inserted Bollards

open access: yesApplied Sciences, 2020
Lack of shock absorption capability of conventional steel bollards causes significant vehicle damage and, consequently, high repair costs. This research studies a solution to reduce vehicle damage by inserting polylactic acid (PLA) honeycomb structures ...
Sangwon Seon   +3 more
doaj   +1 more source

Numerical investigation of the evolution of aerodynamic behaviour when a high-speed train accelerates under crosswind conditions

open access: yesAlexandria Engineering Journal, 2023
Crosswind degrades the aerodynamic behaviour of trains, especially during train acceleration, and an understanding of the flow field and train safety details requires more research attention.
Dan Zhou   +3 more
doaj   +1 more source

The kinematic design of mold clamping mechanism with minimal maximum acceleration

open access: yesAdvances in Mechanical Engineering, 2020
Typically, the motion of the output link of the mode clamping mechanism has reciprocating linear motion, but the motion of the input link can be reciprocating rocking motion or reciprocating linear motion.
Long-Chang Hsieh   +2 more
doaj   +1 more source

Prediction of Acceleration Amplification Ratio of Rocking Foundations Using Machine Learning and Deep Learning Models

open access: yesApplied Sciences, 2023
Experimental results reveal that rocking shallow foundations reduce earthquake-induced force and flexural displacement demands transmitted to structures and can be used as an effective geotechnical seismic isolation mechanism.
Sivapalan Gajan
doaj   +1 more source

Radiation Pressure Acceleration: the factors limiting maximum attainable ion energy

open access: yes, 2016
Radiation pressure acceleration (RPA) is a highly efficient mechanism of laser-driven ion acceleration, with with near complete transfer of the laser energy to the ions in the relativistic regime.
Bulanov, S. S.   +7 more
core   +1 more source

Conjugate gradient acceleration of maximum-likelihoodimagerestoration

open access: yesElectronics Letters, 1995
A maximum-likelihood iterative deconvolution algorithm is accelerated using a conjugate gradient technique with a minimum mean square error criterion. Significant acceleration over previous techniques is achieved with little additional computation.
D.S.C. Biggs, M. Andrews
openaire   +1 more source

Simulations of Ion Acceleration at Non-relativistic Shocks. I. Acceleration Efficiency

open access: yes, 2014
We use 2D and 3D hybrid (kinetic ions - fluid electrons) simulations to investigate particle acceleration and magnetic field amplification at non-relativistic astrophysical shocks.
Caprioli, Damiano, Spitkovsky, Anatoly
core   +1 more source

Lower-limb joint mechanics during maximum acceleration sprinting

open access: yesJournal of Experimental Biology, 2019
We explored how humans adjust the stance phase mechanical function of their major lower-limb joints (hip, knee, ankle) during maximum acceleration sprinting. Experimental data (motion capture and ground reaction force (GRF)) were recorded from eight participants as they performed overground sprinting trials. Six alternative starting locations were used
Anthony G. Schache   +4 more
openaire   +3 more sources

Bulk Energization of Electrons in Solar Flares by Alfv\'en Waves

open access: yes, 2013
Bulk energization of electrons to $10\,-\,20\,$keV in solar flares is attributed to dissipation of Alfv\'en waves that transport energy and potential downward to an acceleration region near the chromosphere.
Melrose, D. B., Wheatland, M. S.
core   +1 more source

Acceleration and Maximum Running Phases in 60-m Sprint and Vertical Jump Performance

open access: yesProceedings, 2019
AIM: The purpose of the present study was to investigate the correlation between acceleration and maximum running phase in 60-m sprint and vertical jump performance.
Ilias Ntoumas   +3 more
doaj   +1 more source

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