Results 51 to 60 of about 258,463 (271)

Curvature-induced bunch self-interaction for an energy-chirped bunch in magnetic bends

Physical Review Special Topics. Accelerators and Beams, 2008
Within the realm of classical electrodynamics, the curvature-induced bunch collective interaction in magnetic bends can be studied using effective forces in the canonical formulation of the coherent synchrotron radiation (CSR) effect.
Rui Li
doaj   +1 more source

Driven Brownian transport through arrays of symmetric obstacles

, 2011
We numerically investigate the transport of a suspended overdamped Brownian particle which is driven through a two-dimensional rectangular array of circular obstacles with finite radius.
B. Hille, B. Y. Zhu, F. Marchesoni, F. Nori, G. Schmid, H. Brenner, H. Risken, J. Kärger, L. Schimansky-Geier, M. H. Jacobs, P. Hänggi, P. K. Ghosh, P. Kloeden, S. Martens   +13 more
core   +1 more source

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

Advanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source

Influence of Traction Force on Locomotive Wheel-Rail Relationship

机车电传动, 2019
In order to analyze the influence of locomotive traction force on wheel-rail relationship, a locomotive track coupling dynamics model based on 60 kg/m and 60N rail was established in SIMPACK multi-body dynamics software, and the horizontal track and ramp
Xiao WU, Junjun DING, Yunhua HUANG, Fu LI   +3 more
doaj  

Inhomogeneous Gradient Poiseuille Flows of a Vertically Swirled Fluid [PDF]

Journal of Applied and Computational Mechanics
An exact solution is proposed for describing the steady-state and unsteady gradient Poiseuille shear flow of a viscous incompressible fluid in a horizontal infinite layer.
Natalya Burmasheva, Sergey Ershkov, Evgeniy Prosviryakov, Dmytro Leshchenko   +3 more
doaj   +1 more source

Elucidating the Role of Surface Ligands on the Oxidative Etching of Au Bipyramids During Photothermia Using Liquid Cell Transmission Electron Microscopy

Advanced Functional Materials, EarlyView.
Gold bipyramids can act as efficient plasmonic nanoheaters, but they often reshape during laser heating. This study shows that oxygen nanobubbles drive oxidative etching and that surface ligands control stability. CTAB‐ and citrate‐coated particles blunt and lose optical performance, whereas polystyrene sulfonate preserves shape and heating by ...
Irene López‐Sicilia, Valentina Girelli Consolaro, Sophie Marbach, Nancy Rahbany, Grégoire Petit, Ovidiu Ersen, Juan J. Giner‐Casares, Ali Abou‐Hassan   +7 more
wiley   +1 more source

Calculation of rigid body rotation and shearing dislocation deformation of adjacent shield tunnels due to excavation of foundation pits

Yantu gongcheng xuebao, 2019
Excavation of foundation pits has a significant impact on the deformation of the adjacent shield tunnels. Considering the additional stress at the tunnel axis due to the soil unloading during excavation, a tunnel deformation model combining the shear ...
WEI Gang 1, HONG Wen-qiang 2, WEI Xin-jiang 1, ZHANG Xin-hai 2, LUO Jing-wei 1
doaj   +1 more source

Structural and Chemical Engineering of Sub‐Nanochannel Membranes Toward Ion Selectivity

Advanced Functional Materials, EarlyView.
This review summarizes recent advances in structural and chemical engineering of sub‐nanochannels for ion selectivity. We first introduce fundamental ion transport mechanisms within sub‐nanochannels, followed by strategies to tune pore size, geometry, and surface functionalities, categorized into charge‐based, ion‐recognition, hydrophilic bonding, and ...
Yuyu Su, Huacheng Zhang, Tamar L. Greaves, Qi Han, Weiwei Lei, Dan Liu   +5 more
wiley   +1 more source

Impact of starting of tunnel boring machine during construction of connecting channel on existing shield tunnels

Yantu gongcheng xuebao
The impact of starting of tunnel boring machine (TBM) on the deformation of the existing shield tunnels under loads during the construction process of connecting passage by the shield tunneling method is currently unclear.
HUANG Dawei 1, 2, 3 , CHEN Houhong 1, 2, 3, XU Changjie 1, 2, 3, LUO Wenjun 1, 2, 3, GENG Daxin 1, 2, 3, LIU Jiaxuan 1, 2, 3
doaj   +1 more source

Space craft soft landing system Patent [PDF]

, 1965
Spacecraft shock absorbing system for soft ...
Eddins, T. O.
core   +1 more source