Results 51 to 60 of about 2,159,370 (313)

A Review on Vibration Monitoring Techniques for Predictive Maintenance of Rotating Machinery

open access: yesEng, 2023
Machine failure in modern industry leads to lost production and reduced competitiveness. Maintenance costs represent between 15% and 60% of the manufacturing cost of the final product, and in heavy industry, these costs can be as high as 50% of the total
Marcelo Romanssini   +3 more
doaj   +1 more source

Flux Tubes in Effective Field Theory [PDF]

open access: yesJ.Phys.G24:545-550,1998, 1995
Quark-antiquark bound states are examined in the long-range strong-coupling limit with the minimal area law of lattice gauge theory assumed as input. Matrix element relations are established which in the effective theory obtain dynamical equations equivalent to a formulation of the flux-tube model.
arxiv   +1 more source

Editor's Highlight: Transplacental and Lactational Transfer of Firemaster® 550 Components in Dosed Wistar Rats.

open access: yesToxicological Sciences, 2016
UNLABELLED Firemaster® 550 (FM 550) is a commercial mixture of organophosphate and brominated flame retardants currently in use as a replacement for pentaBDE.
A. Phillips   +5 more
semanticscholar   +1 more source

Spreading of Kaolin and Sand Mixtures on a Horizontal Plane: Physical Experiments and SPH Numerical Modelling [PDF]

open access: yes, 2017
open4noThe investigation of the collapse of a well-known soil volume is a simple experiment that permits to make several interesting considerations. This paper, at first, presents a brief overview of some physical experiments led to understand how the ...
Brezzi, Lorenzo   +3 more
core   +1 more source

$Zb\bar{b}$ Loop Correction with Charge 2/3 Singlet Quarks [PDF]

open access: yesPhys.Lett. B387 (1996) 544-550, 1996
We calculate the non-universal correction to the $Zb\bar{b}$ vertex in a simple extension of the Standard Model, where a charge $+2/3$ isosinglet quark is added to the standard spectrum. Comparison is made with other solutions to $R_b$ (and $R_c$) that demand particles lighter than $M_W$.
arxiv   +1 more source

"I Saw You": searching for lost love via practices of reading, writing and responding [PDF]

open access: yes, 2001
How do emotions move and how do emotions move us? How are feelings and recognitions distributed socio-materially? Based on a multi-site ethnographic study of a romantic correspondance system, this article explores the themes of love, privacy, identity ...
Laurier, E., Whyte, A.
core   +1 more source

Completely positive dynamics of correlated neutral kaons [PDF]

open access: yesNucl.Phys. B511 (1998) 550-576, 1997
We study the behaviour of correlated neutral kaons produced in phi-meson decays under the hypothesis that the quantum mechanical time-evolution is completely positive. We show that planned experiments at phi-factories could give precise bounds on the phenomenological parameters of the model.
arxiv   +1 more source

Modeling and Control Design of the Symmetrical Interleaved Coupled-Inductor-Based Boost DC-DC Converter with Clamp Circuits

open access: yesEnergies, 2019
The symmetrical input-interleaved high-gain DC-DC converters are suitable candidates to be used as the first stage in PV microinverters and as parallel-connected power optimizers.
Márcio Rodrigo Santos de Carvalho   +3 more
doaj   +1 more source

Reactive Power and Current Harmonic Control Using a Dual Hybrid Power Filter for Unbalanced Non-Linear Loads

open access: yesEnergies, 2018
An important power quality issue is related to current harmonic components demanded by non-linear loads. A solution to mitigate this issue is to use hybrid power filters (HPFs), that apply low power active filters with passive filters.
Leonardo Rodrigues Limongi   +3 more
doaj   +1 more source

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