Results 41 to 50 of about 431,247 (358)
Frontiers in Neurorobotics, 2021 Background: Soft robotic exosuits can facilitate immediate increases in short- and long-distance walking speeds in people with post-stroke hemiparesis.
Franchino Porciuncula +11 more
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The Kinky Propulsion of Spiroplasma [PDF]
Cell, 2005 Bacteria have evolved many different means of generating movement. In this issue of Cell, Shaevitz et al. (2005) describe the swimming movement of a helical bacterium called Spiroplasma. They discover that Spiroplasma propels itself by generating two temporally distinct kinks that travel the length of the bacterium. These results point to the existence
Charles W. Wolgemuth, Nyles W. Charon
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, 2023 “Surface propulsion”means that the aircraft uses its surface of the shell to propel air. Due to the large surface area of the aircraft shell, aircraft using surface propulsion is equivalent to having a huge jet area. The huge surface area of the outer shell allows the aircraft to use a smaller airflow velocity to drive a large flow of gas, achieving ...
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Supersonic Combustion in Air-Breathing Propulsion Systems for Hypersonic Flight
, 2018 Great efforts have been dedicated during the last decades to the research and development of hypersonic aircrafts that can fly at several times the speed of sound.
J. Urzay
semanticscholar +1 more source
Review of Scientific Instruments, 2020 The transition from old space to new space along with increasing commercialization has a major impact on space flight, in general, and on electric propulsion (EP) by ion thrusters, in particular.
K. Holste +26 more
semanticscholar +1 more source
Symmetry breaking propulsion of magnetic microspheres in nonlinearly viscoelastic fluids
Nature Communications, 2021 Microscale propulsion impacts a diverse array of fields ranging from biology and ecology to health applications, such as infection, fertility, drug delivery, and microsurgery.
L. Rogowski +5 more
semanticscholar +1 more source
Analysis of Energy Utilization and Losses for Jet-Propelled Vehicles
Aerospace, 2021 The global control volume-based energy utilization balance for an aerospace vehicle is extended to allow for the analysis of jet-propelled vehicles.
Mohammad Abbas, David W. Riggins
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Limiting propulsion of ionic microswimmers [PDF]
, 2023 Self-propulsion of catalytic Janus swimmers in electrolyte solutions is induced by inhomogeneous ion release from their surface. Here, we consider the experimentally relevant cases of particles which emit only one type of ions (type I) or equal fluxes of cations and anions (type II).
arxiv +1 more source
Swimmers’ Effective Actions during the Backstroke Start Technique
Sensors, 2023 The analysis of the external forces of swimming starts has revealed how swimmers propel themselves out of the block, but data should be properly interpreted to fully understand force-generation mechanisms.
Karla de Jesus +7 more
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Propulsive Capability of an Asymmetric GDM Propulsion System [PDF]
42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006 *† The role of the ambipolar potential in the propulsive capability of the Gasdynamic Mirror (GDM) has been studied previously. The electrostatic potential arises as a result of the initial rapid escape of the electrons due to their small mass, leaving behind an excess of ions and creating a positive electric potential that slows down the electron ...
Kammash, Terry B., Tang, Ricky
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