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Photon-counting CT-guided bone biopsy with real-time bone marrow edema mapping. [PDF]
Eur Radiol ExpAlvarez de Sierra Garcia B +3 more
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Physics Bulletin, 1971
I would like to comment on the recent article by Dr P C W Davies (April 1971 p211), in which the author discusses the direction of time's arrow. The concept of direction implies a reference frame relative to which direction can be determined.
A H Nelson, P C W Davies, D F A Edwards
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I would like to comment on the recent article by Dr P C W Davies (April 1971 p211), in which the author discusses the direction of time's arrow. The concept of direction implies a reference frame relative to which direction can be determined.
A H Nelson, P C W Davies, D F A Edwards
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American Journal of Physics, 1962
The time symmetry of the physical laws is discussed. The asymmetry in all statistical processes is found to be related to the tendency for radiation to diverge and that in turn is related to the expansion of the universe. No asymmetry is contained in the laws of electrodynamics, and the choice of the retarded potentials is not a time unsymmetrical step.
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The time symmetry of the physical laws is discussed. The asymmetry in all statistical processes is found to be related to the tendency for radiation to diverge and that in turn is related to the expansion of the universe. No asymmetry is contained in the laws of electrodynamics, and the choice of the retarded potentials is not a time unsymmetrical step.
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New Scientist
The 'arrow of time,' a concept first introduced by Sir Arthur Eddington, reflects the one-way flow of time and its association with various physical asymmetries in thermodynamics, cosmology, quantum mechanics, field theories, and beyond. Yet, the foundations of the arrow of time continues to challenge physicists and philosophers, having profound ...
Peter Pickl, Aaron Schaal
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The 'arrow of time,' a concept first introduced by Sir Arthur Eddington, reflects the one-way flow of time and its association with various physical asymmetries in thermodynamics, cosmology, quantum mechanics, field theories, and beyond. Yet, the foundations of the arrow of time continues to challenge physicists and philosophers, having profound ...
Peter Pickl, Aaron Schaal
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1998
Humanity has tried to comprehend two fundamental events since time immemorial: the birth of the universe and the emergence of life. Recently, it is claimed that these events can be understood comprehensively by means of a metaphor: the 'arrow of time.' The purpose of the present paper is twofold: (1) to build an epistemological structure that underlies
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Humanity has tried to comprehend two fundamental events since time immemorial: the birth of the universe and the emergence of life. Recently, it is claimed that these events can be understood comprehensively by means of a metaphor: the 'arrow of time.' The purpose of the present paper is twofold: (1) to build an epistemological structure that underlies
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Physical Review D, 1985
The usual proof of the CPT theorem does not apply to theories which include the gravitational field. Nevertheless, it is shown that CPT invariance still holds in these cases provided that, as has recently been proposed, the quantum state of the Universe is defined by a path integral over metrics that are compact without boundary. The observed asymmetry
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The usual proof of the CPT theorem does not apply to theories which include the gravitational field. Nevertheless, it is shown that CPT invariance still holds in these cases provided that, as has recently been proposed, the quantum state of the Universe is defined by a path integral over metrics that are compact without boundary. The observed asymmetry
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2018
Much has been said, conjectured, speculated and dreamed about the origin and evolution of the universe, by scientists and non-scientists alike. Any system of thought claiming to provide an understanding of the physical world, made some statement about the origin and evolution of the universe.
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Much has been said, conjectured, speculated and dreamed about the origin and evolution of the universe, by scientists and non-scientists alike. Any system of thought claiming to provide an understanding of the physical world, made some statement about the origin and evolution of the universe.
openaire +1 more source