Results 141 to 150 of about 9,570 (308)
One‐Shot Multimaterial 3D Printing of a Flexible Spine for a Robotic Fish Prototype
Advanced Intelligent Systems, EarlyView.A one‐shot multimaterial 3D printing approach enables a monolithic soft robotic fish integrating a compliant spine and rigid vertebrae. Electromagnetic linear actuators drive tendon‐based transmission, producing controlled tail oscillations. Finite element modeling and experiments show strong agreement, while optimized material selection improves ...
Marco Colletta +3 more
wiley +1 more source
Wormholes, branes and finite matrices in sine dilaton gravity
Journal of High Energy PhysicsWe compute the double trumpet in sine dilaton gravity via WdW quantization. The wormhole size is discretized. The wormhole amplitude matches the spectral correlation of a finite-cut matrix integral, where matrices have large but finite dimensions.
Andreas Blommaert +4 more
doaj +1 more source
Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons
Journal of High Energy Physics, 2018 The geometric description of gravitational memory for strong gravitational waves is developed, with particular focus on shockwaves and their spinning analogues, gyratons.
Graham M. Shore
doaj +1 more source
Quantum reduction to Bianchi I models in loop quantum gravity [PDF]
Physical Review D, 2015 5 pages. v2: partly rewritten to clarify derivation, gauge group enlarged from U(1) to R_Bohr, relation to old and new LQC dynamics discussed, previous results unchanged.
openaire +2 more sources
Take a Ride on a Time Machine [PDF]
, 2003 We discuss the possibility to build and operate a time machine, a device that produces closed timelike curves (CTCs). We specify the spacetime structure needed to implement a time machine and assess attempted no-go results against time machines in ...
Wuthrich, Christian +2 more
core
Advanced Intelligent Systems, EarlyView.This work presents a magnetic bronchoscopy robot with a novel multi‐segment variable stiffness catheter. This catheter can not only move flexibly in the narrow bronchi but also harden according to the need to provide support. Combined with remote wireless magnetic field drive, it provides a more precise and effective solution for biopsy of deep lung ...
Shucong Yin +10 more
wiley +1 more source
On the ‘simple’ form of the gravitational action and the self-interacting graviton
Journal of High Energy Physics, 2017 The so-called ΓΓ-form of the gravitational Lagrangian, long known to provide its most compact expression as well as the most efficient generation of the graviton vertices, is taken as the starting point for discussing General Relativity as a theory of ...
E. T. Tomboulis
doaj +1 more source
Quantum Gravity with the Standard Model
, 2002 A unified theory of four-dimensional gravity together with the standard model is presented, with supersymmetry breaking of M-theory at a TeV. Masses of the the known particles are derived. The cosmological constant is quantum generated to the observed value. Quantum corrections to the classical compactification are analyzed, and the scenario is stable.
openaire +2 more sources
Quantum Gravity and Lorentz Invariance Violation in the Standard Model [PDF]
Physical Review Letters, 2005 The most important problem of fundamental Physics is the quantization of the gravitational field. A main difficulty is the lack of available experimental tests that discriminate among the theories proposed to quantize gravity. Recently, Lorentz invariance violation by Quantum Gravity(QG) have been the source of a growing interest.
openaire +6 more sources
Ising model coupled to three-dimensional quantum gravity [PDF]
Physical Review D, 1992 11 ...
openaire +3 more sources