Results 61 to 70 of about 93,870 (317)

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

Adaptive PHD-BOF: A Slow-moving Targets Tracking Method with Air Surveillance Radar

Leida xuebao
Low-altitude targets, represented by rotor unmanned aerial vehicles, can typically adopt a slow-cruise mode. As a result, their echoes fall within the Doppler Blind Zone (DBZ) and evade radar detection and tracking. The cluttered low-altitude environment
Yingjian ZHAO, Libing JIANG, Shuyu ZHENG, Qingwei YANG, Zhuang WANG   +4 more
doaj   +1 more source

Mission to the Trojan Asteroids: lessons learned during a JPL Planetary Science Summer School mission design exercise

, 2013
The 2013 Planetary Science Decadal Survey identified a detailed investigation of the Trojan asteroids occupying Jupiter's L4 and L5 Lagrange points as a priority for future NASA missions.
Balcerski, Jeffrey, Benneke, Bjoern, Budney, Charles J., Carande, Bryce, Diaz-Silva, Ricardo A., Diniega, Serina, Fraeman, Abigail A., Gil, Stephanie, Guzewich, Scott D., Hudson, Jennifer, Livi, Roberto, Lowes, Leslie L., Nahm, Amanda L., Potter-McIntyre, Sally, Route, Matthew, Sayanagi, Kunio M., Urban, Kevin D., Vasisht, Soumya, Williams, Brian   +18 more
core   +1 more source

On the possibility of radar echo detection of ultra-high energy cosmic ray- and neutrino-induced extensive air showers [PDF]

, 2000
We revisit and extend the analysis supporting a 60 year-old suggestion that cosmic rays air showers resulting from primary particles with energies above 10^{18} eV should be straightforward to detect with radar ranging techniques, where the radar echoes ...
Appleton, Balanis, Baltrusaitis, Blackett, Bourdeau, Buonsanto, Capelle, Colwell, Gallagher, Greenhow, Hanbury Brown, Jones, Jones, Kamata, Kraus, Lidga, Lidga, Lovell, Matano, Peter W Gorham, Poulter, Rossi, Seaton, Segre, Skolnik, Sovers, Thomas, Watson Watt, Watson Watt, Wehner, Williams   +30 more
core   +2 more sources

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Fast Dual Trifeature-Based Detection of Small Targets in Sea Clutter by Using Median Normalized Doppler Amplitude Spectra

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
High-resolution sea-surface surveillance radars are designed to find two classes of small targets, low-velocity and floating small targets on the sea surface and low-altitude small targets over the sea surface.
Zi-Xun Guo, Xiao-Hui Bai, Peng-Lang Shui, Ling Wang, Jia Su   +4 more
doaj   +1 more source

Light‐Driven Quadrupedal Walking Biohybrid Robot With Antagonistic Muscle‐Rings and Inclined Joints

Advanced Robotics Research, EarlyView.
This work presents a light‐driven quadrupedal walking biohybrid robot powered by antagonistic muscle‐rings that achieve alternating walking gait. Optical training improved reproducibility of cultured muscle tissues, while caffeine treatment enhanced contractile force.
Shotaro Saito, Byeongwook Jo, Tomohiro Morita, Shota Noda, Minghao Nie, Shoji Takeuchi   +5 more
wiley   +1 more source

Exploring Planets with Directed Aerial Robot Explorers [PDF]

, 2004
Global Aerospace Corporation (GAC) is developing a revolutionary system architecture for exploration of planetary atmospheres and surfaces from atmospheric altitudes. The work is supported by the NASA Institute for Advanced Concepts (NIAC).
Aaron, Kim M., Heun, Matthew K., Ingersoll, Andrew P., Lorenz, Ralph D., Nock, Kerry T., Pankine, Alexey A., Schlaifer, R. Stephen   +6 more
core  

Directed Energy Interception of Satellites

, 2019
High power Earth and orbital-based directed energy (DE) systems pose a potential hazard to Earth orbiting spacecraft. The use of very high power, large aperture DE systems to propel spacecraft is being pursued as the only known, feasible method to ...
Hettel, Will, Lubin, Philip, She, Harrison   +2 more
core   +2 more sources

A Functionally Conserved Enhancer is Critical for PGC1A Expression and Thermogenesis in Brown Fat

Advanced Science, EarlyView.
An evolutionarily conserved enhancer controls PGC1A expression and thermogenic activation in brown adipose tissue. Integrative multi‐omics analyses identify two BAT‐specific enhancers, with PGC1A‐En1 functioning as the dominant regulatory element that maintains thermogenic capacity across species.
Duo Su, Haosen Yang, Xiaokai Li, Tingting Jiang, Siyuan Zhan, Tao Zhong, Jiazhong Guo, Yan Wang, Li Li, Hongping Zhang, Linjie Wang   +10 more
wiley   +1 more source