Results 171 to 180 of about 491,279 (390)

Propulsion Without Wheels [PDF]

, 1967
Randall Brown
openalex   +1 more source

On wave-driven propulsion

Journal of Fluid Mechanics
A theory is presented for wave-driven propulsion of floating bodies driven into oscillation at the fluid interface. By coupling the equations of motion of the body to a quasipotential flow model of the fluid, we derive expressions for the drift speed and propulsive thrust of the body which in turn are shown to be consistent with global momentum ...
Graham P. Benham, Olivier Devauchelle, Stuart J. Thomson   +2 more
openaire   +3 more sources

Metamaterial Adhesives‐Integrated Triboelectric Nanogenerators with Enhanced and Programmable Charge Generation and Adhesion

Advanced Functional Materials, EarlyView.
A metamaterial adhesive‐integrated triboelectric nanogenerator (MetaAdh‐TENG) that integrates nonlinear cuts and a TENG in a flexible adhesive film is presented. The MetaAdh‐TENG simultaneously provides enhanced charge generation and strong adhesion by controlling crack propagation during peeling.
Hee Jin Lee, Dong Kwan Kang, Junghwa Kang, Changwook Lee, Michael D. Bartlett, Junyeob Yeo, Hoon Eui Jeong   +6 more
wiley   +1 more source

Field resonance propulsion concept [PDF]

A propulsion concept was developed based on a proposed resonance between coherent, pulsed electromagnetic wave forms, and gravitational wave forms (or space-time metrics).
Holt, A. C.
core   +1 more source

Electric Machine Design and Integration for an Electric Propulsion System in Medium-Altitude Long-Endurance Unmanned Aerial Vehicles

Applied Sciences
Unmanned Aerial Vehicles (UAVs) are increasingly used in both civilian and military applications around the world. There are several types of UAVs with classifications according to several quantities.
Emre Kurt, Ahmet Yigit Arabul, Fatma Keskin Arabul, Ibrahim Senol   +3 more
doaj   +1 more source

Combustion and Propulsion: High Mach Number Air-Breathing Engines [PDF]

, 1960
W. Cawood
openalex   +1 more source

Printed Integrated Logic Circuits Based on Chitosan‐Gated Organic Transistors for Future Edible Systems

Advanced Functional Materials, EarlyView.
Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco, Valerio Francesco Annese, Valerio Galli, Ilaria Penna, Debora Russo, Marina Veronesi, Rita Scarpelli, Stefania Sabella, Mario Caironi   +8 more
wiley   +1 more source

Electric propulsion engine test chamber Patent [PDF]

, 1965
Electric propulsion engine test ...
Childs, J. H., Grobman, J., Rayle, W. D.
core   +1 more source

A Validation Protocol for an Instrumented Wheel: A Comparison with a Dual-Roller Handrim Wheelchair Ergometer

Methods and Protocols
Measuring the propulsion performance of sport wheelchairs in ecological conditions remains complex due to variations inherent in real-world practice.
Safiya Noury, Arnaud Hays, Nolwenn Poquerusse, Opale Vigié, Lorian Honnorat, Ilona Alberca, Mathieu Deves, Justin Regnaud, Arnaud Faupin   +8 more
doaj   +1 more source

Modulating Oxide‐Based Quantum Materials by Ion Implantation

Advanced Functional Materials, EarlyView.
This review highlights how ion implantation, a well developed chip‐technology, enables targeted modulation of oxide‐based quantum materials. This includes tuning of metal‐insulator transitions, magnetism, and superconductivity through selective doping, defect creation, and induced lattice strain. Abstract Ion implantation has emerged as a powerful tool
Andreas Herklotz, Thomas Zac Ward, Shengqiang Zhou   +2 more
wiley   +1 more source