Results 101 to 110 of about 858,402 (225)

No Pinching: Topological Constraints on Polar Cap Patch Formation [PDF]

Journal of Geophysical Research: Space Physics
The creation of topologically separated patches requires a physical mechanism to tear the electron density contours. This paper begins with common assumptions about the F-region ionospheric plasma, including the electrostatic condition, and examines which sorts of topological reconfigurations of plasma density contours are possible given those ...
openaire   +1 more source

On solar protons and polar cap absorption: Constraints on an empirical relationship [PDF]

, 2004
International audienceA large database of Solar Proton Events (SPE) from the period 1995 to 2001 is used to investigate the relationship between proton flux at geostationary orbit and Cosmic Noise Absorption (CNA) in the auroral zone. The effect of solar
A. Senior, Senior, A., S. R. Marple, Kavanagh, A. J., A. J. Kavanagh, Marple, S. R., McCrea, I. W., F. Honary, I. W. McCrea, Honary, F.   +9 more
core   +2 more sources

A Bioinspired Underwater Soft Robot for Active Intravesical Liquid Delivery and Mixing

Advanced Intelligent Systems, EarlyView.
A bioinspired underwater soft robot is reported that integrates an elastic strain energy‐driven soft robotic pump with a programmable flexible magnetic valve, enabling remotely controlled, programmable, and sustained liquid release and mixing. This functionality is enabled by the synergistic integration of elastic strain energy‐driven pumping and ...
Jacob Katona, Sage Bernstein, Boyang Xiao, Amie Zhang, Ellen Lu, Evan Ticknor, Jeffrey J. Tosoian, Xiaoguang Dong   +7 more
wiley   +1 more source

A Hybrid Magnetic Actuation System for Single‐Input Multistates Stabilization: Application to pH‐Responsive Drug Delivery

Advanced Intelligent Systems, EarlyView.
This study presents an integrated proof‐of‐concept robotic platform for targeted delivery applications. A hybrid magnetic actuation system achieves single‐input (z) multistate stabilization (x, y, ϕ, and θ) for precise capsule transport with submillimeter positioning accuracy.
Sejun Park, Hanbi Park, Suho Lee, Bohyeon Kim, Jiseong Ryu, ChangKyu Yoon, Donghoon Son   +6 more
wiley   +1 more source

Autonomous Charging and Battery Swapping for Unmanned Aerial Vehicles: A Review

Advanced Intelligent Systems, EarlyView.
This review evaluates major autonomous charging and battery swapping methods for unmanned aerial vehicles (UAVs) against a single question: how close each is to sustained unattended operation. Rather than ranking them by charging performance, it identifies the limitation that most restricts each method, and briefly outlines the supporting technologies ...
Zelin Wu, Yuanwen Zhang, Xiangdong Meng, Guangyu Zhang, Huiwen Zhang, Yuquan Leng   +5 more
wiley   +1 more source

Segmentation of SED by Boundary Flows Associated With Westward Drifting Partial Ring current

Geophysical Research Letters, 2019
The segmentation mechanism of polar cap patches is agreed to be related to temporal changes of interplanetary magnetic field or transient reconnection.
Zihan Wang, Shasha Zou, Thomas Coppeans, Jiaen Ren, Aaron Ridley, Tamas Gombosi   +5 more
doaj   +1 more source

Beyond the Camera: Epidermal Sensor Platforms for Intelligent Facial Expression Recognition and Interactive Human Monitoring

Advanced Intelligent Systems, EarlyView.
Skin‐conformal epidermal sensors enable camera‐free intelligent facial monitoring by converting facial deformation and muscle activity into electrical signals through piezoresistive, capacitive, electrophysiologic, and self‐powered mechanisms. Coupled with artificial intelligence (AI), these platforms support facial expression recognition, human ...
Jeehyun Joung, Manchi Nagaraju, Jun‐Gyu Choi, Jaeil Park, Sungjun Park, Daegun Kim   +5 more
wiley   +1 more source

Fabrication‐Aware Mechanical Design of SLA‐Printed Polymeric Microneedles: Integrating Geometry, Dimensional Fidelity, and Structural Instability

Journal of Applied Polymer Science, EarlyView.
SLA‐printed microneedles exhibit fabrication‐induced dimensional deviations that strongly influence their mechanical response. Comparison of nominal CAD, global as‐printed, and local critical‐section models shows that local tip‐region geometry provides the closest agreement with experimental instability loads, highlighting the importance of fabrication‐
Rafael C. Otoni, Leandro T. Kochi, Ana Carola D. L. V. Reis, Fabíola L. de Castro, Wendel A. Alves   +4 more
wiley   +1 more source

Scale‐space image analysis for mapping spotted knapweed in grassland ecosystems

Applications in Plant Sciences, EarlyView.
Abstract Premise This study investigates the value of scale‐space representations of spatial features for the identification and mapping of invasive plants using high‐resolution multispectral imagery. Scale‐space representations combine the two‐dimensional spatial domain with a third dimension representing spatial scale, such that features can be ...
Shohreh Sahebi, David J. Hill
wiley   +1 more source

F layer ionization patches in the polar cap

Journal of Geophysical Research: Space Physics, 1984
Ground‐based optical and digital ionosonde measurements were conducted at Thule, Greenland to measure ionospheric structure and dynamics in the nighttime polar cap F layer. These observations showed the existence of large‐scale (800–1000 km) plasma patches drifting in the antisunward ...
E. J. Weber, J. Buchau, J. G. Moore, J. R. Sharber, R. C. Livingston, J. D. Winningham, B. W. Reinisch   +6 more
openaire   +2 more sources