Results 101 to 110 of about 1,560 (287)

High-power converters for space applications [PDF]

Phase 1 was a concept definition effort to extend space-type dc/dc converter technology to the megawatt level with a weight of less than 0.1 kg/kW (220 lb./MW). Two system designs were evaluated in Phase 1.
Cooper, Randy, Park, J. N.
core   +1 more source

Investigation on the Influence of Opening Velocity for Vacuum Arc Control under Different Axial Magnetic Field Contact [PDF]

The world campaign toward green energy in the electrical engineering field highlighted replacing traditional SF6 circuit breakers with environmentally friendly vacuum circuit breakers (VCBs) in transmission-level power systems as an effective method to ...
ma, Qiang, Mangara, Kurwa Mabojano, Tebo, Felix Exavery, Tianlu, Liu   +3 more
core   +2 more sources

Dynamic Supramolecular Polyurethane Elastomers Enabling Bioinspired Strain‐Adaptive Stiffening to Resolve the Softness–Strength Paradox

Advanced Science, EarlyView.
Segmental‐level molecular engineering of a supramolecular polyurethane elastomer integrates strain‐adaptive chains, soft elastic segments, and dynamic hydrogen bonding motifs. This design reconciles skin‐like softness with muscle‐level strength, offering a sustainable and high‐performance material platform for next‐generation artificial skin and soft ...
Haoming Zou, Zhi‐Xiong Fei, Zhao Yang, Ke‐Ke Yang, Dong‐Xu Yang, Ling‐Ying Shi   +5 more
wiley   +1 more source

Space construction system analysis. Part 2: Platform definition [PDF]

The top level system requirements are summarized and the accompanying conceptual design for an engineering and technology verification platform (ETVP) system is presented.
Abramson, R. D., Dejong, P. N., Donavan, R. D., Greenberg, H. S., Hart, R. J., Indrikis, J., Jandrasi, J. S., Manoff, M., Mcbaine, C. K., Myers, H. L.   +9 more
core   +1 more source

Physics‐Constrained Constitutive Learning of Rate‐Limiting Timescales for Efficient Hydrogen‐Based Direct Reduction for Green Steel Making

Advanced Science, EarlyView.
A conversion‐resolved constitutive framework is developed for the hydrogen‐based direct reduction of iron oxide pellets. Effective reaction and transport timescales are inferred directly from measured trajectories and mapped against operating conditions, pellet architecture, and composition. The analysis reveals how late‐stage transport control emerges
Anurag Bajpai, Barak Ratzker, Pasquale Cavaliere, Dierk Raabe   +3 more
wiley   +1 more source

Interruption of Reignition-Current in Vacuum Interrupters

IEEJ Transactions on Power and Energy, 1996
R. P. P. Smeets, N. J. G. Lamerichs, H. Q. Li, Kenji Watanabe   +3 more
openaire   +2 more sources

Where ppm Quantities of Silsesquioxanes Make a Difference-Silanes and Cage Siloxanes as TiO₂ Dispersants and Stabilizers for Pigmented Epoxy Resins. [PDF]

Materials (Basel), 2022
Brząkalski D, Przekop RE, Frydrych M, Pakuła D, Dobrosielska M, Sztorch B, Marciniec B.   +6 more
europepmc   +1 more source

A Worm‐Inspired Origami Robot with Multimodal Locomotion for Adaptive Mobility in Complex Pipeline Environments

Advanced Science, EarlyView.
An origami worm‐inspired robot achieves multimodal locomotion in confined pipelines through mechatronic integration that embeds actuation, control, and communication within each origami module. Large, reversible configuration and dimensional changes enable 25 gaits synthesized by a unified framework across peristaltic, inchworm, and wheel‐rolling modes
Qiwei Zhang, Kangning Tan, Zihan He, Hongsen Pang, Yanjie Wang, Hongbin Fang, Jian Xu   +6 more
wiley   +1 more source

The Development and Deployment of a Ground-Based, Laser-Induced Fluorescence Instrument for the In Situ Detection of Iodine Monoxide Radicals [PDF]

High abundances of iodine monoxide (IO) are known to exist and to participate in local photochemistry of the marine boundary layer. Of particular interest are the roles IO plays in the formation of new particles in coastal marine environments and in ...
Anderson, J. G., Co, D. T., Hanisco, T. F., Hannun, R. A., Lapson, L. B., O'Brien, A. S., Thurlow, M. E.   +6 more
core   +1 more source

Properties of Vacuum Arc Influenced by Electrode Diameter and Material in TMF Contact Based on Forced Current Zero [PDF]

, 2017
With the increase in electrical equipment in More/All Electric Aircraft, 270 V dc power supply systems will be needed. One method for DC interruption is forced current zero (FCZ).
Deng, Y., Huo, W., Jin, X., Wu, J., Zhu, L.   +4 more
core   +1 more source