Results 41 to 50 of about 9,797 (163)

Reliable Estimation for Health Index of Transformer Oil Based on Novel Combined Predictive Maintenance Techniques

IEEE Access, 2022
Transformer oil insulation condition may be deteriorated due to electrical and thermal faults, which may lead to transformer failure and system outage. In this regard, the first part of this paper presents comprehensive maintenance for power transformers
Mohamed Badawi, Shimaa A. Ibrahim, Diaa-Eldin A. Mansour, Adel A. El-Faraskoury, Sayed A. Ward, Karar Mahmoud, Matti Lehtonen, Mohamed M. F. Darwish   +7 more
doaj   +1 more source

Influence of ageing on oil degradation and gassing tendency under high-energy electrical discharge faults for mineral oil and synthetic ester

High Voltage, 2020
In this work, mineral oil and synthetic esters were selected at different ageing factors (based on acidity values). Fresh and aged oils have been subjected to high-energy discharges (repeated 100 breakdowns) to simulate electric faults of highly ...
L. Loiselle, U. Mohan Rao, I. Fofana, I. Fofana   +3 more
doaj   +1 more source

Coded aperture compressive temporal imaging [PDF]

, 2013
We use mechanical translation of a coded aperture for code division multiple access compression of video. We present experimental results for reconstruction at 148 frames per coded snapshot.Comment: 19 pages (when compiled with Optics Express' TEX ...
Brady, David J., Carin, Lawrence, Kittle, David, Liao, Xuejun, Llull, Patrick, Sapiro, Guillermo, Yang, Jianbo, Yuan, Xin   +7 more
core   +2 more sources

Stable Carbon and Nitrogen Isotope Analysis Explores Diverse Domestic Goose Management Practices in Medieval and Postmedieval Russia

International Journal of Osteoarchaeology, EarlyView.
ABSTRACT Studying goose domestication through archaeological finds has been challenging due to the similar skeletal morphology of the European domestic goose and its wild progenitor, the greylag goose (Anser anser). We analyzed stable carbon (δ13C) and nitrogen (δ15N) isotopes from bone collagen of subfossil domestic and potentially domestic geese to ...
Johanna Honka, Clément Massé, Arthur O. Askeyev, Igor V. Askeyev, Oleg V. Askeyev, Jouni Aspi, Dilyara N. Shaymuratova, Laura Kvist   +7 more
wiley   +1 more source

Comparison of Dissolved Gases in Mineral and Vegetable Insulating Oils under Typical Electrical and Thermal Faults

Energies, 2016
Dissolved gas analysis (DGA) is attracting greater and greater interest from researchers as a fault diagnostic tool for power transformers filled with vegetable insulating oils.
Chenmeng Xiang, Quan Zhou, Jian Li, Qingdan Huang, Haoyong Song, Zhaotao Zhang   +5 more
doaj   +1 more source

‘We Are Only Playing’: Reflections on the Pandemic's Effects on Immigrant Preschoolers' Mentalisation and Play During the Sand Play Workshops

Children &Society, EarlyView.
ABSTRACT Mentalisation and symbolisation are important processes to support children in understanding their lived experience. By expressing what is most salient to them through pretend play, children can normally develop their capacity to mentalise and symbolise, which helps them cope with adversity.
Caroline Beauregard
wiley   +1 more source

Coordinating representation registers: linear algebra students' understanding of orthogonal Legendre polynomials in the inner product space ℙn in a technology-assisted learning environment

Annales de Didactique et de Sciences Cognitives, 2018
The purpose of this research study was to understand how linear algebra students in a university in the United States make sense of the orthogonal Legendre polynomials as vectors of the inner product space ℙn in a DGS (Dynamic Geometry Software)-MATLAB ...
Günhan Caglayan
doaj   +1 more source

On column density thresholds and the star formation rate [PDF]

, 2014
We present the results of a numerical study designed to address the question of whether there is a column density threshold for star formation within molecular clouds. We have simulated a large number of different clouds, with volume and column densities
Clark, Paul C., Glover, Simon C. O.
core   +1 more source

Overcoming barriers? The mixed results of social innovation accelerator programs for women entrepreneurs

Strategic Management Journal, Volume 47, Issue 6, Page 1576-1639, June 2026.
Abstract Research Summary Entrepreneurship accelerators are increasingly promoted as structural interventions to close gender gaps, yet studies have not established a differential impact of participation for women. This prior evidence—drawn from high‐tech, male‐dominated settings—may overlook how outcomes differ in more feminized domains such as social
Nilanjana Dutt, Sarah Kaplan
wiley   +1 more source

Berry Curvature, Triangle Anomalies, and the Chiral Magnetic Effect in Fermi Liquids

, 2012
In a three-dimensional Fermi liquid, quasiparticles near the Fermi surface may possess a Berry curvature. We show that if the Berry curvature has a nonvanishing flux through the Fermi surface, the particle number associated with this Fermi surface has a ...
Dam Thanh Son, G. E. Volovik, L. D. Landau, L. D. Landau, Naoki Yamamoto, R. Jackiw   +5 more
core   +1 more source