Results 51 to 60 of about 3,169 (198)

Water‐Mediated 1,7‐Palladium Aryl‐to‐Aryl Migration in an Unusual Aryne Trimerization Enables the Synthesis of Multihelicenes with Profoundly Hindered Stereogenic Axes

open access: yesAdvanced Synthesis &Catalysis, Volume 367, Issue 21, November 13, 2025.
In the presence of a Pd0 catalyst, large π‐extended arynes trimerize in an unusual manner to forge extremely compact and strained chiral benzenoids. This new trimerization reaction involves a 1,7‐Pd isomerization, a rare and poorly understood process that is elucidated.
Albert Artigas   +6 more
wiley   +1 more source

Calculation of Maximum Permissible Load of Underground Power Cables–Numerical Approach for Systems with Stabilized Backfill

open access: yesApplied Sciences
The maximum permissible load of underground power cables (known in U.S. engineering as “ampacity”) is a function of many parameters, in particular, the thermal resistivity of the native soil.
Seweryn Szultka   +3 more
doaj   +1 more source

High-Ampacity Power Cables of Tightly-Packed and Aligned Carbon Nanotubes

open access: yes, 2014
We characterize the current-carrying capacity (CCC), or ampacity, of highly-conductive, light, and strong carbon nanotube (CNT) fibers by measuring their failure current density (FCD) and continuous current rating (CCR) values.
Behabtu, N.   +5 more
core   +1 more source

Constructing Non‐Commensurate Cu–C Interfaces With High Thermal Conductance via Symmetric Tilt Grain Boundaries

open access: yesCarbon Energy, Volume 7, Issue 10, October 2025.
The local atomic structural variations induced by the internal grain boundaries in copper are utilized to excite phonon vibrations, which facilitates phonon transmission across the copper–graphene van der Waals interface, thereby significantly enhancing interfacial thermal conductance. This study innovatively addresses the bottleneck of melting failure
Haimo Li   +4 more
wiley   +1 more source

Ampacity Calculation Method for Overhead Conductors in High-Altitude Areas Based on Numerical Simulation

open access: yesEnergies
Overhead transmission lines are critical carriers for power delivery, directly influencing the security of the power system. In high-altitude areas, special environmental conditions such as low air pressure and intense solar radiation significantly ...
Jia Li   +3 more
doaj   +1 more source

Thermal Effect of Different Laying Modes on Cross-Linked Polyethylene (XLPE) Insulation and a New Estimation on Cable Ampacity

open access: yesEnergies, 2019
This paper verifies the fluctuation on thermal parameters and ampacity of the high-voltage cross-linked polyethylene (XLPE) cables with different insulation conditions and describes the results of a thermal aging experiment on the XLPE insulation with ...
WenWei Zhu   +7 more
doaj   +1 more source

The Influence of Climatic Conditions on the Dynamic Ampacity of Overhead Power Lines

open access: yesActa Electrotechnica et Informatica, 2023
The constantly growing demand for electricity demands both on the installed power of energy sources and on the transmission capabilities of electrical networks.
Beňa Ľubomír   +2 more
doaj   +1 more source

Self-consistent Modeling of the $I_c$ of HTS Devices: How Accurate do Models Really Need to Be?

open access: yes, 2014
Numerical models for computing the effective critical current of devices made of HTS tapes require the knowledge of the Jc(B,theta) dependence, i.e. of the way the critical current density Jc depends on the magnetic flux density B and its orientation ...
Grilli, Francesco   +3 more
core   +1 more source

Regression relationships for costs of facilites in electrical power networks 10- 35 kV [PDF]

open access: yes, 2017
Обґрунтування заходів зі зменшення технологічних витрат електричної енергії потребує достовірних вартісних показників. Автори дослідили зміну вартості кабельно-провідникової продукції від її перерізу, а також вартості трансформаторів від їх номінальної
Буйний, Роман Олександрович   +2 more
core   +1 more source

A 3D Printing Strategy for Hard Curved Surfaced Circuits: From Materials to Applications

open access: yesAdvanced Science, Volume 12, Issue 36, September 25, 2025.
Conventional PCB etching (multi‐step) and indirect transfer techniques fail to meet structural electronics’ demands for lightweight, miniaturized, and customized manufacturing. 3D‐printed conformal circuits enable direct integration of conductive traces into substrates or onto surfaces, achieving integrated structural‐functional fabrication.
Wang Qin   +12 more
wiley   +1 more source

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