Results 81 to 90 of about 195,565 (345)
An anomalous propulsion mechanism
Nuclear Physics B, 2018 We consider a gas of free chiral fermions trapped inside a uniform rotating spherical shell. Once the shell becomes transparent the fermions are emitted along the axis of rotation due to the chiral and mixed anomaly. In return, owing to momentum conservation, the shell is propelled forward. We study the dependence of the magnitude of this effect on the
Evgeny Shaverin, Amos Yarom
openaire +4 more sources
Advanced Engineering Materials, EarlyView.Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat +6 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.This review explores wafer bonding technologies, covering wafer preparation, activation methods, and bonding mechanisms. It compares direct and indirect bonding, highlights recent advancements and future trends, and examines applications in 3D integration and packaging.
Abdul Ahad Khan +5 more
wiley +1 more source
A Novel Self-Deployable Solar Sail System Activated by Shape Memory Alloys
Aerospace, 2019 This work deals with the feasibility and reliability about the use of shape memory alloys (SMAs) as mechanical actuators for solar sail self-deployment instead of heavy and bulky mechanical booms.
Gianluigi Bovesecchi +3 more
doaj +1 more source
Recent progress and perspectives of space electric propulsion systems based on smart nanomaterials
Nature Communications, 2018 Drastic miniaturization of electronics and ingression of next-generation nanomaterials into space technology have provoked a renaissance in interplanetary flights and near-Earth space exploration using small unmanned satellites and systems.
I. Levchenko +6 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.The utilization of direct energy deposition (DED)‐arc additive manufacturing processes in industrial applications is increasing, and these processes have the potential for multi‐material applications. This work provides a overview of the state of research in DED‐arc made functional graded structures, to establish a link to potential industrial ...
Kai Treutler, Volker Wesling
wiley +1 more source
On the Mysterious Propulsion of Synechococcus
PLoS ONE, 2012 We propose a model for the self-propulsion of the marine bacterium Synechococcus utilizing a continuous looped helical track analogous to that found in Myxobacteria [1]. In our model cargo-carrying protein motors, driven by proton-motive force, move along a continuous looped helical track.
George Oster, Kurt Ehlers, Kurt Ehlers
openaire +5 more sources
Microscale 3D Printed Pillars and Porous Polymeric Structures: Manufacturability and Micromechanics
Advanced Engineering Materials, EarlyView.This work demonstrates how two‐photon polymerization enables the fabrication of microscale solid and porous structures from IP‐Q, IP‐S, and IP‐PDMS resins. Combining morphological and mechanical characterization, the study provides the first systematic insights into IP‐Q mechanics and reveals how processing parameters affect structure and stiffness ...
Aikaterini Isaakidou +12 more
wiley +1 more source
Fluids, 2020 Turning maneuvers by aquatic animals are essential for fundamental life functions such as finding food or mates while avoiding predation. However, turning requires resolution of a fundamental dilemma based in rotational mechanics: the force powering a ...
John O. Dabiri +5 more
doaj +1 more source