Results 61 to 70 of about 24,259 (317)

Swelling‐Programmed Topographical Guidance for Dynamic Spheroid Self‐Assembly via a Mechanochemical Hydrogel Niche

Advanced Functional Materials, EarlyView.
A swelling‐programmed micropatterned hydrogel guides adherent cells through a controlled transition from cell–matrix anchoring to cadherin‐mediated cell–cell compaction, enabling rapid assembly of high‐viability spheroids with defined size and morphology.
Han Gyeol Nam, Seon Yeong Chae, Young Woo Kwon, Hye Jin Heo, Hye Rin Lee, Ji Hyeok Lee, Dong‐Wook Han, Yun Hak Kim, Suck Won Hong   +8 more
wiley   +1 more source

Development of methods for measuring partial discharges in the solid insulation with gaseous defects of power transformers

Journal of Electrical Systems and Information Technology
This article presents a research project aimed at developing a method for measuring the intensity of the electric field inducing partial discharges (PDs) in a gaseous defect within a solid insulator.
Nyetereye Frederic, Usachev Alexander Evgenievich, Kubarev Artyom Yuryevich   +2 more
doaj   +1 more source

Spectral Method for Localization of Multiple Partial Discharges in Dielectric Insulation of Hydro-Generator Coils: Simulation and Experimental Results

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
A methodology based on spectral analysis for localization of multiple partial discharges in dielectric region of hydro-generator coils is proposed. This pinpointing of multiple discharges aims to provide means for performing diagnosis of insulating ...
Rodrigo M. S. de Oliveira, Jonathas F. M. Modesto, Victor Dmitriev, Fernando S. Brasil, Paulo R. M. de Vilhena   +4 more
doaj   +1 more source

Partial Discharge in Electronic Equipments [PDF]

, 2009
Tato disertační práce se věnuje studiu částečných výbojů (PD) způsobených poklesem spolehlivosti a životnosti elektronických zařízení a systémů. Diagnostika PD je dnes známá metoda pro vysoké napětí u vysoko-výkonných zařízení.
Mammadov, Anar
core  

Fractal-based autonomous partial discharge pattern recognition method for MV motors [PDF]

, 2018
On-line partial discharge (PD) monitoring is being increasingly adopted to improve the asset management and maintenance of medium-voltage (MV) motors. This study presents a novel method for autonomous analysis and classification of motor PD patterns in ...
Cacciari M., Danikas M., Jian L., Keller J.M., Kheirmand A., Kreuger F.F.H., Krivda A., Li S., Mandelbrot B., Salama M., Song X., Stone G., Xiaosheng P., Xiaoxing Z., Xiaoxing Z., Zhou C.   +15 more
core   +2 more sources

Robust Polymer Hydrogels Improve Electric‐Fish‐Inspired Batteries

Advanced Functional Materials, EarlyView.
ABSTRACT Electric‐fish‐inspired hydrogel batteries based on ion‐concentration gradients offer an attractive route to soft power sources; however, the poor mechanical properties of existing hydrogels limit device assembly and performance. Here, we report poly(ethylene glycol) methyl ether acrylate hydrogels that enable ion‐gradient batteries composed of
Nick Zahnd, Satyajit Das, John Marc C. Puguan, Carolina Pierucci, Michael Mayer, Christoph Weder   +5 more
wiley   +1 more source

Assessing the effects of power quality on partial discharge behaviour through machine learning [PDF]

, 2010
Partial discharge (PD) is commonly used as an indicator of insulation health in high voltage equipment, but research has indicated that power quality, particularly harmonics, can strongly influence the discharge behaviour and the corresponding pattern ...
Bahadoorsingh, S., Catterson, V.M., McArthur, S.D.J., Rowland, S.M., Rudd, S.E.   +4 more
core  

Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications

Advanced Functional Materials, EarlyView.
Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi, Norma Mallegni, Andrea Dorigato, Mario Milazzo   +3 more
wiley   +1 more source

A Comparison of Inductive Sensors in the Characterization of Partial Discharges and Electrical Noise Using the Chromatic Technique

Sensors, 2018
Partial discharges (PDs) are one of the most important classes of ageing processes that occur within electrical insulation. PD detection is a standardized technique to qualify the state of the insulation in electric assets such as machines and power ...
Jorge Alfredo Ardila-Rey, Johny Montaña, Bruno Albuquerque de Castro, Roger Schurch, José Alfredo Covolan Ulson, Firdaus Muhammad-Sukki, Nurul Aini Bani   +6 more
doaj   +1 more source

Sessile water droplets on insulating surfaces subject to high AC stress effect of contact angle [PDF]

, 2002
Surface pollution of outdoor high-voltage insulators is an important cause of flashover. We have undertaken an experimental study of electrical breakdown at the edges of a sessile water droplet on a planar, polymeric, insulating surface when subject to ...
Crichton, B.H., Fouracre, R.A., Gouda, H.A., Stickland, M.T.   +3 more
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