Results 31 to 40 of about 64,798 (158)
Noûs, EarlyView.Abstract The active/passive distinction, once a hallmark of classical metaphysics, has largely been discarded from contemporary thought. The revival of powers theory has not seen an equally vigorous rehabilitation of the real distinction between active and passive powers. I begin an analysis and vindication with a critique of E.J. Lowe's discussion.
David S. Oderberg
wiley +1 more source
Quantum isolated horizons and black hole entropy
, 2012 We give a short introduction to the approaches currently used to describe black holes in loop quantum gravity. We will concentrate on the classical issues related to the modeling of black holes as isolated horizons, give a short discussion of their ...
G., J. Fernando Barbero +2 more
core +1 more source
Nonperturbative solutions for canonical quantum gravity: An overview [PDF]
Physics Reports, 1997 In this paper we will make a survey of solutions to the Wheeler-Dewitt equation which have been found up to now in Ashtekar's formulation for canonical quantum gravity. Roughly speaking they are classified into two categories, namely, Wilson-loop solutions and topological solutions.
openaire +3 more sources
The simplicity of physical laws
Noûs, EarlyView.Abstract Physical laws are strikingly simple, yet there is no a priori reason for them to be so. I propose that nomic realists—Humeans and non‐Humeans—should recognize simplicity as a fundamental epistemic guide for discovering and evaluating candidate physical laws.
Eddy Keming Chen
wiley +1 more source
Artificial Gold Enzymes Using a Genetically Encoded Thiophenol‐Based Noble‐Metal‐Binding Ligand
Angewandte Chemie, Volume 137, Issue 12, March 17, 2025.A new class of artificial metalloenzymes containing genetically encoded noble‐metal‐binding sites featuring a non‐canonical thiophenol‐based amino acid, which serves as an excellent soft ligand for binding various noble metals, was developed. The corresponding gold(I) enzyme was characterised, confirming gold binding to the thiophenol, and successfully
Mathijs J. Veen +5 more
wiley +2 more sources
Generalised Wick Transform in Dimensionally Reduced Gravity
, 2003 In the context of canonical quantum gravity, we study an alternative real quantisation scheme, which is arising by relating simpler Riemannian quantum theory to the more complicated physical Lorentzian theory - the generalised Wick transform.
Ashtekar A +13 more
core +1 more source
MINISUPERSPACE MODEL FOR REVISED CANONICAL QUANTUM GRAVITY [PDF]
International Journal of Modern Physics D, 2004 We present a reformulation of the canonical quantization of gravity, as referred to the minisuperspace; the new approach is based on fixing a Gaussian (or synchronous) reference frame and then quantizing the system via the reconstruction of a suitable constraint; then the quantum dynamics is re-stated in a generic coordinates system and it becomes ...
openaire +3 more sources
The Once and Future Hydrology Is Whole Earth Hydrology
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract We here argue for a new paradigm to advance pursuit of truth in global freshwater science. Our proposed Whole Earth Hydrology is hydrology that is explicitly empirical and discovery‐based, grounded in primary data, detailed at scale, and incorporates humans as essential.
Colin J. Gleason, Casey M. Brown
wiley +1 more source
Dust as a standard of space and time in canonical quantum gravity [PDF]
Physical Review D, 1995 The coupling of the metric to an incoherent dust introduces into spacetime a privileged dynamical reference frame and time foliation. The comoving coordinates of the dust particles and the proper time along the dust worldlines become canonical coordinates in the phase space of the system.
K.V. Kuchar, J. D. Brown
openaire +4 more sources