Results 71 to 80 of about 46,151 (336)
Closed orbits and their bifurcations in the crossed-fields hydrogen atom
, 2002 A systematic study of closed classical orbits of the hydrogen atom in crossed electric and magnetic fields is presented. We develop a local bifurcation theory for closed orbits which is analogous to the well-known bifurcation theory for periodic orbits ...
Bartsch, T., Main, J., Wunner, G.
core +1 more source
Observing Brownian motion in vibration-fluidized granular matter [PDF]
, 2003 At the beginning of last century, Gerlach and Lehrer observed the rotational Brownian motion of a very fine wire immersed in an equilibrium environment, a gas.
A Barrat +19 more
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Advanced Engineering Materials, EarlyView.This study presents a reversible temperature sensor with high switching ratio, ∼103. The device is fabricated using PET‐ITO and carbon nanotube dispersions in alkane. Considering its application in cold chain logistics, a proof‐of‐concept with LED is showcased. Thus, a temperature drop below the threshold temperature (crystallization temperature of the
Sunil Kumar Behera +8 more
wiley +1 more source
Experiment of Vibrating Effect on Cement Stone Strength by Cementing Vibrator in Casing
Shiyou jixie, 2018 To improve the cementing quality of adjusting wells, the vibration of cementing vibrator in wellbore was studied. The ø139.7 mm casing cementing vibrator system was described. The vibration influence of vibrator in casing on the strength of cement
Yin Wenbo +4 more
doaj
Advanced Engineering Materials, EarlyView.Powder metal processing provides scalable advantages in nanoporous (np) metal development. Mechanical alloying is used to produce unique precursors for hybrid nanopore formation by oxide reduction and dealloying. As demonstrated in np Ag, this approach improves process efficiency while promoting smaller ligaments and larger pores, both of which are ...
Mark A. Atwater, Oliver A. Fowler
wiley +1 more source
Advances in Mechanical Engineering, 2019 Hydraulic disturbance of a vibrator is the main cause of distortion of the vibroseis geophysical exploration signal that is caused by high-frequency fluid vibration during servo valve cavity commutation.
Zhen Chen +5 more
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A new portable vibrator for plaster pouring: effect on the marginal fit at cylinder-abutment
Journal of Applied Oral Science, 2012 OBJECTIVE: The aim of this study was to test a new portable vibrator for plaster pouring (developed for this purpose), comparing the effect of its use on the accuracy of working cast of implant-supported restorations to the conventional vibrator ...
Pâmela Cândida Aires Ribas de Andrade +3 more
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Condition sensor system and method [PDF]
, 1978 The condition sensor system comprises a condition detector which produces a pulse when a parameter of the monitored condition exceeds a desired threshold. A resettable condition counter counts each pulse.
Mandell, A. +2 more
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Advanced Engineering Materials, EarlyView.This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira +4 more
wiley +1 more source
Disturbance study of seismic vibrator reaction mass and piston.
PLoS ONE, 2019 The seismic vibrator has become a main energy source for land seismic exploration. For a seismic vibrator, a piston is installed in the vertical direction in the reaction mass, and the reaction mass moves up and down along the piston. Because of vibrator
Zhen Chen +5 more
doaj +1 more source