Results 91 to 100 of about 1,342,913 (205)
Survey on AI‐Enabled Computer Vision Technologies and Applications for Space Robotic Missions
Journal of Field Robotics, Volume 43, Issue 4, Page 2553-2584, June 2026.ABSTRACT This survey provides a comprehensive overview of recent advancements and challenges in Artificial Intelligence (AI)‐enabled computer vision (CV) techniques for space robotic missions, spanning critical phases such as Entry, Descent, and Landing (EDL), orbital operations, and planetary surface exploration.
Maciej Quoos +6 more
wiley +1 more source
Inter–Annual Variability of Model Parameters Improves Simulation of Annual Gross Primary Production
Journal of Advances in Modeling Earth Systems, Volume 18, Issue 6, June 2026.Abstract Parametric uncertainty can hinder land surface models (LSM) from accurately simulating carbon fluxes, such as gross primary production (GPP). These models generally cannot capture inter–annual variability (IAV) of fluxes well due to missing processes, and temporally varying parameters can partially alleviate this limitation.
Ranit De +18 more
wiley +1 more source
Holographic bound in covariant loop quantum gravity [PDF]
Physical Review D, 2016 We investigate puncture statistics based on the covariant area spectrum in loop quantum gravity. First, we consider Maxwell-Boltzmann statistics with a Gibbs factor for punctures. We establish formulae which relate physical quantities such as horizon area to the parameter characterizing holographic degrees of freedom.
openaire +2 more sources
Comment on “Towards a quantum notion of covariance in spherically symmetric loop quantum gravity”
Physical Review D, 2022 A recent paper promises new constructions that may make it possible to achieve covariance in spherically symmetric models of loop quantum gravity. This claim is contrary to the discovery of several stubborn obstacles to covariance uncovered in the same models during the last few years.
openaire +2 more sources
Dilaton gravity with a boundary: from unitarity to black hole evaporation
Journal of High Energy Physics, 2020 We point out that two-dimensional Russo-Susskind-Thorlacius (RST) model for evaporating black holes is locally equivalent — at the full quantum level — to flat-space Jackiw-Teitelboim (JT) gravity that was recently shown to be unitary.
Maxim Fitkevich +2 more
doaj +1 more source
On the Emergence of Time in Quantum Gravity [PDF]
, 1999 We discuss from a philosophical perspective the way in which the normal concept of time might be said to `emerge' in a quantum theory of gravity. After an introduction, we briefly discuss the notion of emergence, without regard to time (Section 2).
Butterfield, Jeremy, Isham, Chris
core
Relating covariant and canonical approaches to triangulated models of quantum gravity [PDF]
Classical and Quantum Gravity, 2002 28 pages, 10 ...
openaire +3 more sources
From Quantum Codes to Gravity: A Journey of Gravitizing Quantum Mechanics
, 2021 In this note, I review a recent approach to quantum gravity that “gravitizes” quantum mechanics by emerging geometry and gravity from complex quantum states.
Chun-Jun Cao
core +1 more source
Linearization (in)stabilities and crossed products
Journal of High Energy PhysicsModular crossed product algebras have recently assumed an important role in perturbative quantum gravity as they lead to an intrinsic regularization of entanglement entropies by introducing quantum reference frames (QRFs) in place of explicit regulators.
Julian De Vuyst +3 more
doaj +1 more source
Non-perturbative 3d Lorentzian quantum gravity [PDF]
, 2001 We have recently introduced a discrete model of Lorentzian quantum gravity, given as a regularized non-perturbative state sum over simplicial Lorentzian spacetimes, each possessing a uniqueWick rotation to Euclidean signature.
Ambj¢rn, J. +11 more
core +2 more sources