Results 211 to 220 of about 2,347,924 (407)
Lessons from (2+1)-dimensional quantum gravity [PDF]
PoSQG-Ph:035,2007, 2007 Proposals that quantum gravity gives rise to non-commutative spacetime geometry and deformations of Poincare symmetry are examined in the context of (2+1)-dimensional quantum gravity. The results are expressed in five lessons, which summarise how the gravitational constant, Planck's constant and the cosmological constant enter the non-commutative and ...
arxiv
Spring and Power in Hovering Ornithopters
Advanced Intelligent Systems, EarlyView.Only small ornithopters can hover, longest at the hummingbird size. This article reviews the drive and power of these hovering machines, focusing on elastic energy and thrust boosters. Unlike two‐winged designs, X‐winged and multiple‐V‐winged ornithopters benefit from lower disk loading and slower, smaller wingbeats, and the clap‐and‐fling effect ...
Gih‐Keong Lau +4 more
wiley +1 more source
The Quantum Regularization of Singular Black-Hole Solutions in Covariant Quantum Gravity. [PDF]
Entropy (Basel), 2021 Tessarotto M, Cremaschini C.
europepmc +1 more source
Chiral Symmetry Breaking in Quantum Gravity in Flat Background Spacetime [PDF]
, 1985 O. Abe
openalex +1 more source
Quantum gravity from general relativity [PDF]
arXiv, 2019 Although general relativity is a predictively successful theory, it treats matter as classical rather than as quantum. For this reason, it will have to be replaced by a more fundamental quantum theory of gravity. Attempts to formulate a quantum theory of gravity suggest that such a theory may have radical consequences for the nature, and indeed the ...
arxiv
Morphy: A Compliant and Morphologically Aware Flying Robot
Advanced Intelligent Systems, EarlyView.This study presents Morphy, a 25.2 cm‐wide, 260 g aerial robot with flexible, sensorized joints that enable it to withstand high‐speed collisions and squeeze through narrow spaces. Powered by an adaptive control scheme exploiting real‐time morphology feedback, Morphy demonstrates resilience in trajectory tracking, collision, and impact recovery and ...
Paolo De Petris +2 more
wiley +1 more source
PairTilt: Design and Control of an Active Tilt‐Rotor Quadcopter for Improved Efficiency and Agility
Advanced Intelligent Systems, EarlyView.PairTilt is an actuated tilt‐rotor unmanned aerial vehicle capable of active shape reconfiguration, balancing simplicity, efficiency, and agility. Its H‐shaped frame incorporates pairwise tiltable rotors, which reduce gyroscopic torque and decouple key dynamics, enhancing maneuverability and reducing drag.
Jerry Tang, Mark W. Mueller
wiley +1 more source
Non-simple conformal loop ensembles on Liouville quantum gravity and the law of CLE percolation interfaces. [PDF]
Probab Theory Relat Fields, 2021 Miller J, Sheffield S, Werner W.
europepmc +1 more source
Quantum w3 gravity in the chiral gauge [PDF]
, 1991 Kareljan Schoutens +2 more
openalex +1 more source