Results 61 to 70 of about 8,032 (299)

Multidirectional Motion Strategy of Miniature Water Surface Robot Actuated by Single Exciter

Advanced Robotics Research, EarlyView.
A novel multidirectional motion strategy on the water surface based on a single exciter is proposed, and a single‐exciter single‐plate module is developed for actuation. The driving forces generation mechanism of the module is revealed from the perspective of the asymmetric surface wave field.
Haoxuan He, Dehong Wang, Jing Li, Shijing Zhang, Yingxiang Liu   +4 more
wiley   +1 more source

Orbital dynamics of "smart dust" devices with solar radiation pressure and drag

, 2011
This paper investigates how perturbations due to asymmetric solar radiation pressure, in the presence of Earth shadow, and atmospheric drag can be balanced to obtain long-lived Earth centred orbits for swarms of micro-scale 'smart dust' devices, without ...
Colombo, Camilla, McInnes, Colin
core   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Stable Stratification of the Helium Rain Layer Yields Vastly Different Interiors and Magnetic Fields for Jupiter and Saturn

The Planetary Science Journal
At sufficiently high pressures (∼Mbar) and low temperatures (∼10 ^3 –10 ^4 K), hydrogen and helium become partly immiscible. Interpretations of Jupiter’s and Saturn’s magnetic fields favor the existence of a statically stable layer near the Mbar pressure
S. Markham, T. Guillot
doaj   +1 more source

Geophysical evolution of planetary interiors and surfaces : Moon & Mars [PDF]

, 2013
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2013.Cataloged from PDF version of thesis.Includes bibliographical references (pages 127-138).The interiors and surfaces of the terrestrial ...
Evans, Alexander Joseph
core  

The future of planetary atmospheric, surface, and interior science using radio and laser links [PDF]

, 2017
Studies of planetary systems using spacecraft radio links constitute the field of Radio Science (RS). Experiments have been conducted on almost every planetary mission in the past five decades and have led to numerous discoveries.
Bell D. J., Atkmson D. H., Asmar S. W., Dehant V., Mazarico E., Iess L., Simpson R. A., Bird M. K., Preston R. A., Patzold M., Lazio T. J. W., Mannucci A. J., Lmscott I. R., Armstrong J. W., Park R. S.   +14 more
core   +1 more source

The Discovery of a Planetary Companion Interior to Hot Jupiter WASP-132 b

, 2022
Hot Jupiters are generally observed to lack close planetary companions, a trend that has been interpreted as evidence for high-eccentricity migration. We present the discovery and validation of WASP-132 c (TOI-822.02), a 1.85 ± 0.10 R ⊕ planet on a 1.01 ...
Berger, T.A., Latham, D.W., Hord, B.J., Seager, S., Collins, K.A., Mann, A.W., Twicken, J.D., Ricker, G.R., Jenkins, J.M., Falk, B., Sefako, R., Colón, K.D., Lissauer, J.J., Briceño, C., Vanderburg, A., Torres, G., Ziegler, C., Bouma, L.G., Law, N., Stassun, K.G., Winn, J.N., Silverstein, M.L., Schwarz, R.P., Kostov, V.   +23 more
core   +1 more source

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source

Effect of a Surficial Porous Brittle Layer on the Dynamics and Equilibrium Thickness of Europa’s Ice Shell

The Planetary Science Journal
Tectonic and cryovolcanic features on Europa suggest a dynamically active ice shell with a highly deformable near-surface brittle layer. Shell thickness estimates based on geological interpretation and thermal modeling vary from 10 km to more than 30 km.
Rawad Himo, Sabrina Carpy, Gabriel Tobie, Cathy Castelain   +3 more
doaj   +1 more source

Orbital dynamics of high area-to-mass ratio spacecraft under the influence of J2 and solar radiation pressure

, 2011
This paper investigates the effect of planetary oblateness and solar radiation pressure on the orbit of high area-to-mass spacecraft. A planar Hamiltonian model shows the existence of equilibrium orbits with the orbit apogee pointing towards or away from
Colombo, Camilla, McInnes, Colin, Mcinnes, Colin R., Lucking, Charlotte   +3 more
core