Results 131 to 140 of about 234,218 (345)

Full Band Spectra Analysis of Gait Acceleration Signals for Peripheral Arterial Disease Patients

Frontiers in Physiology, 2018
Peripheral arterial disease (PAD) is an artherosclerotic occlusive disorder of distal arteries, which can give rise to the intermittent claudication (IC) phenomenon, i.e., limb pain and necessity to stop.
Mihaela I. Chidean, Óscar Barquero-Pérez, Rebeca Goya-Esteban, Alberto Sánchez Sixto, Blanca de la Cruz Torres, Jose Naranjo Orellana, Elena Sarabia Cachadiña, Antonio J. Caamaño   +7 more
doaj   +1 more source

Twinkling pulsar wind nebulae in the synchrotron cut-off regime and the gamma-ray flares in the Crab Nebula

, 2011
Synchrotron radiation of ultra-relativistic particles accelerated in a pulsar wind nebula may dominate its spectrum up to gamma-ray energies. Because of the short cooling time of the gamma-ray emitting electrons, the gamma-ray emission zone is in the ...
A. M. Bykov, A. V. Artemyev, Abdo, Arendt, Arons, Arons, Atoyan, Bednarek, Bietenholz, Bietenholz, Bykov, Bykov, Bykov, Bykov, Bykov, Camus, Caraveo, Crusius, Daughton, de Jager, Drake, G. G. Pavlov, Guilbert, Hester, Hester, Kennel, Keshet, Kirk, Komissarov, Lemoine, Niemiec, Nishikawa, Pelletier, Rybicki, Scargle, Sironi, Sironi, Spitkovsky, Striani, Tavani, Tennant, Uzdensky, Vittorini, Yu. A. Uvarov, Yuan, Zelenyi, Zimbardo, Zirakashvili   +47 more
core   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

Micropleated Nanofibrous Filters for High‐Efficiency Submicron Aerosol Filtration: A Comparative Study with Chemical, Biological, Radiological, and Nuclear Gas Mask Filters

Advanced Engineering Materials, EarlyView.
This study presents micropleated filters manufactured by needleless electrospinning. Nanofibers are deposited onto uniaxially pre‐stretched substrates that contract upon release, forming densely packed micropleats. This architecture increases effective surface area without enlarging the filter size, achieving quality factors comparable to those of ...
Aleksandr Fadeev, Kevin Crown, Sean Kinahan, Gabriel Lucero, Hayden Stromsodt, Svetlana Romanova, Yury Salkovskiy   +6 more
wiley   +1 more source

Dynamic response and damage character of road embankment under strong earthquake

International Journal of Distributed Sensor Networks, 2018
Dynamic response of road embankment under strong earthquake was explored by site investigation, shaking table tests, and discrete element method simulations, which shows that the distribution of responded accelerations strongly depends on the amplitude ...
Jian Wang, Qimin Li, Changwei Yang, Caizhi Zhou   +3 more
doaj   +1 more source

A Positron Lifetime Study of Cooling and Natural Aging of Solutionized Aluminum Alloys

Advanced Engineering Materials, EarlyView.
The process during cooling of Al–Mg and Al–Mg–Si alloys from the solutionizing temperature down to 20 °C is interrupted. These states are analyzed with positron lifetime spectroscopy to trace the processes during cooling. In different temperature ranges, two stages of vacancy loss and solute clustering are identified.
Zi Yang, Mengjie Li, John Banhart
wiley   +1 more source

Dynamic effective stress analysis of a site with liquefiable interlayer: considering vertical and horizontal ground motion

Frontiers in Earth Science
This study uses a fully coupled dynamic effective stress analysis method to evaluate the seismic response of a site containing silty sand which is a liquefiable interlayer.
Xiao-Bo Peng, Yuan Gao, Ying-Ying Xue, Xiao-San Tao, Ling-Yu Xu   +4 more
doaj   +1 more source

Some Experiences of Improving the Speed of Numerical Navier-Stokes Solver Using CUDA

Journal of Algorithms & Computational Technology, 2014
In this paper, the Graphics Processor Unit (GPU) is adopted to accelerate the codes of solving incompressible Navier-Stokes equations with two fully different numerical schemes: spectral method and finite difference method. Compared with the codes on CPU,
Kaiyuan Lou, Qiaohong Li, Zhaohua Yin
doaj   +1 more source

Challenges during Flash Lamp Annealing of Aerosol‐Deposited Barium Titanate Films

Advanced Engineering Materials, EarlyView.
Aerosol deposition is used to rapidly deposit barium titanate films with thicknesses ranging from 2 to 16 μm at room temperature, eliminating the need for further densification. However, to recover the electromechanical properties, annealing is required, which limits the usage of temperature‐sensitive substrates.
Michel Kuhfuß, Juliette Cardoletti, Udo R. Eckstein, Shaoxiong Xie, Alexander Martin, Ken‐ichi Kakimoto, Sebastjan Glinšek, Kyle G. Webber   +7 more
wiley   +1 more source

A comparative study of two models for the seismic analysis of buildings

Ingeniería e Investigación, 2012
This paper presents a model for the seismic analysis of buildings, taking two lumped masses at each level in a structure’s free nodes and comparing them to the traditional model which considers lumped masses per level, i.e., a mass for each floor of the ...
Arnulfo Luévanos Rojas
doaj