Results 41 to 50 of about 69,393 (296)
Fully 3D‐Printed Wave‐Wound Electromagnetic Motors
Advanced Materials Technologies, EarlyView.This work presents the first fully 3D‐printed wave‐wound electromagnetic motors, which are created using conductive nanoparticle inks, carbon‐filled nylon polymers, and surface mount components. These motors can achieve a stall torque of 7.62N·mmA−1$7.62 \nobreakspace N{\cdot }mm A^{-1}$ and efficiency of 28.2 %, which approaches the performance of ...
Joseph Schwalbe +4 more
wiley +1 more source
Homoleptic and Heteroleptic Carbones L1‐C‐L2
Angewandte Chemie, EarlyView.DFT and CCSD(T) calculations reveal that heteroleptic carbones L₁–C–L2 are thermodynamically stable species even with a weakly binding donor such as N2. Bond strengths show no simple correlation with bond lengths. Weaker carbon‐ligand bonds in homoleptic complexes L1─C─L1 are mostly strengthened in heteroleptic carbons L1─C─L2, while stronger bonds L2 ...
Ya Hu +4 more
wiley +2 more sources
Atmospheric densities from Explorer 17 density gauges and a comparison with satellite drag data [PDF]
, 1965 Atmospheric density data from Explorer XVII GAUGES and satellite drag ...
Horowitz, R., Newton, G., Priester, W.
core +1 more source
Light‑Driven Propulsion of Graphene Aerogels in Microgravity
Advanced Science, EarlyView.Ultralight graphene aerogels convert laser light into thrust. Parabolic‐flight experiments directly compare their motion in microgravity and at 1 g, revealing order‐of‐magnitude enhancements in distance, velocity, and transient thrust when weight and friction are removed (∼50 times enhancement).
Omnia Khattab +10 more
wiley +1 more source
Angewandte Chemie, EarlyView.Current interest in artificial cell research underscores its potential to deepen our understanding of life's fundamental processes. This review highlights advances in bottom‐up coacervate‐based artificial cell engineering via combined integration of cellular hallmarks.
Arjan Hazegh Nikroo +3 more
wiley +2 more sources
Performance Estimate of a Spin-Stabilized Drag Sail for Spacecraft Deorbiting
Applied SciencesThe growing amount of space debris in geocentricorbit poses a significant threat to the future of space operations. To mitigate this problem, current international guidelines state that a satellite should be able to deorbit or insert into a graveyard ...
Lorenzo Niccolai, Giovanni Mengali
doaj +1 more source
Effects of Solar Activities, Drag Coefficient and Atmospheric Wind on Altitude Loss of a LEO Satellite [PDF]
فصلنامه علوم و فناوری فضایی, 2008 In this paper, the effects of future solar activities, drag coefficient and atmospheric wind on altitude loss and life time of a LEO satellite is investigated. For this purpose, an orbit propagator is used whose results have been verified by STK software.
T. Abdollahi, A. Jahangirian, A. Naghash
doaj
Topological Materials and Related Applications
Advanced Electronic Materials, EarlyView.This review covers topological materials—including topological insulators, quantum valley Hall and quantum spin Hall insulators, and topological Weyl and Dirac semimetals—as well as their most recent advancements in fields such as spintronics, electronics, photonics, thermoelectrics, and catalysis.
Carlo Grazianetti +9 more
wiley +1 more source
On the orbit of the LARES satellite [PDF]
, 2006 This paper is motivated by the recent possibility to find an inexpensive launching vehicle for the LARES satellite, however at an altitude much lower than originally planned for the LAGEOS III/LARES satellite.
Ciufolini, Ignazio
core +2 more sources
The 1:1 resonance in Extrasolar Systems: Migration from planetary to satellite orbits
, 2011 We present families of symmetric and asymmetric periodic orbits at the 1/1 resonance, for a planetary system consisting of a star and two small bodies, in comparison to the star, moving in the same plane under their mutual gravitational attraction.
A. Morbidelli +28 more
core +1 more source