Results 101 to 110 of about 47,904 (244)
Specialized Orthonormal Frames and Embedding
Symmetry, Integrability and Geometry: Methods and Applications, 2013 We discuss some specializations of the frames of flat orthonormal frame bundles over geometries of indefinite signature, and the resulting symmetries of families of embedded Riemannian or pseudo-Riemannian geometries.
Frank B. Estabrook
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Advanced Materials Technologies, EarlyView.A flexible pressure sensor utilizing a 3D dual‐pore polyurethane structure is developed to overcome the intrinsic trade‐off between sensitivity and linearity. By inducing sequential buckling through distinct pore sizes and shapes, the device achieves highly linear and sensitive responses across a wide pressure range.
Jae Yeong Jang, Jaemin Choi, Young Jung
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Learning Highly Dynamic Skills Transition for Quadruped Jumping Through Constrained Space
Advanced Robotics Research, EarlyView.A quadruped robot masters dynamic jumps through constrained spaces with animal‐inspired moves and intelligent vision control. This hierarchical learning approach combines imitation of biological agility with real‐time trajectory planning. Although legged animals are capable of performing explosive motions while traversing confined spaces, replicating ...
Zeren Luo +6 more
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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
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European Physical Journal C: Particles and FieldsIn this work, we consider an extension of the symmetric teleparallel equivalent of General Relativity (STEGR), namely, $$f({\mathbb {Q}})$$ f ( Q ) gravity, by including a boundary term $${\mathbb {B}}_Q$$ B Q , where $${\mathbb {Q}}$$ Q is the non ...
José Tarciso S. S. Junior +2 more
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Stable Imitation of Multigait and Bipedal Motions for Quadrupedal Robots Over Uneven Terrains
Advanced Robotics Research, EarlyView.How are quadrupedal robots empowered to execute complex navigation tasks, including multigait and bipedal motions? Challenges in stability and real‐world adaptation persist, especially with uneven terrains and disturbances. This article presents an imitation learning framework that enhances adaptability and robustness by incorporating long short‐term ...
Erdong Xiao +3 more
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The semi-classical saddles in three-dimensional gravity via holography and mini-superspace approach
Journal of High Energy PhysicsWe determine the complex geometries dual to the semi-classical saddles in three-dimensional gravity with positive or negative cosmological constant. We examine the semi-classical saddles in Liouville field theory and interpret them in terms of gravity ...
Heng-Yu Chen +3 more
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Influence of gonadectomy on muscle health in micro- and partial-gravity environments in rats.
J Appl Physiol (1985), 2023 Rosa-Caldwell ME +6 more
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Micro- and Partial Gravity Atmospheric Flight [PDF]
AIAA Atmospheric Flight Mechanics Conference and Exhibit, 2002 Alwin Kraeger, Rene van Paassen
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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 +5 more
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