Results 21 to 30 of about 280,938 (303)

Resistance fracture of minimally prepared endocrowns made by three types of restorative materials: a 3D finite element analysis

open access: yesJournal of Materials Science: Materials in Medicine, 2021
A thin endocrown restoration was often applied in endodontically treated teeth with vertical bite height loss or inadequate clinical crown length. A model of mandibular molars made by endocrown restoration with 1 mm thickness and 2 mm depth of pulp ...
Qingzhen Meng   +4 more
doaj   +1 more source

Optimal distribution system restoration using PHEVs

open access: yesIET Smart Grid, 2018
Power outages cost billions of dollars every year and jeopardise the lives of hospital patients. Traditionally, power distribution system takes a long time to recover after a major blackout, due to its top-down operation strategy.
Wei Sun   +4 more
doaj   +1 more source

Proactive repair crew deployment to improve transmission system resilience against hurricanes

open access: yesIET Generation, Transmission & Distribution, 2021
Extreme weather events, such as hurricanes, impose severe impacts on power systems. A rapid repair for power systems is desired after hurricanes pass to mitigate load‐shedding losses.
Yiheng Bian, Zhaohong Bie, Gengfeng Li
doaj   +1 more source

Class I Gap-formation in Highly-viscous Glass-ionomer Restorations: Delayed vs Immediate Polishing [PDF]

open access: yes, 2007
This in vitro study evaluated the effects of delayed versus immediate polishing to permit maturation of interfacial gap-formation around highly viscous conventional glass-ionomer cement (HV-GIC) in Class I restorations, together with determining the ...
M. Irie   +28 more
core   +6 more sources

A Comprehensive Network Restoration Model for Active Distribution Network Considering Forecast Uncertainty

open access: yesIEEE Access, 2021
The active distribution network management (ADNM) equipped by active distribution networks (ADNs) can enhance the resilience of the network after failure.
Guanghe Wang   +6 more
doaj   +1 more source

Historical changes (1905-2005) in external phosphorus loads to Loch Leven, Scotland, UK [PDF]

open access: yes, 2012
This article reviews historical changes in the total phosphorus (TP) inputs to Loch Leven, Scotland, UK. Data derived from palaeolimnological records suggest that inputs in the early 1900s were about 6 t TP year-1 (0.45 g TP m-2 year-1).
Bennion, H.   +3 more
core   +1 more source

The Effect of Occlusal Loading on the Microleakage of Class V Restorations

open access: yesOperative Dentistry, 2008
Clinical Relevance The occlusal stress generated in the cervical region during normal function and parafunction may increase microleakage or detoriate the margins of Class V restorations. This study suggests that self-etch adhesives achieve marginal sealing equal to total-etch adhesives under occlusal loading.
Uctasli, MİNE BETÜL   +4 more
openaire   +3 more sources

The role of intelligent systems in delivering the smart grid [PDF]

open access: yes, 2010
The development of "smart" or "intelligent" energy networks has been proposed by both EPRI's IntelliGrid initiative and the European SmartGrids Technology Platform as a key step in meeting our future energy needs.
Catterson, Victoria   +2 more
core   +1 more source

Voltage Multistability and Pulse Emergency Control for Distribution System with Power Flow Reversal [PDF]

open access: yes, 2015
High levels of penetration of distributed generation and aggressive reactive power compensation may result in the reversal of power flows in future distribution grids.
Nguyen, Hung D., Turitsyn, Konstantin
core   +2 more sources

Measurement Feedback-Driven Load Restoration Enhancement of Active Distribution Networks with Soft Open Points

open access: yesCSEE Journal of Power and Energy Systems
Increasing distributed generator (DG) penetration poses significant challenges in the restoration performance of active distribution networks (ADNs). Load restoration after topology reconfiguration has not been adequately considered. With the development
Chengshan Wang   +7 more
doaj   +1 more source

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