Key role of retardation and non-locality in sound propagation in amorphous solids as evidenced by a projection formalism

2020 ◽  
Vol 153 (14) ◽  
pp. 144502
Author(s):  
Christiane Caroli ◽  
Anaël Lemaître
Keyword(s):  
Sound Propagation ◽  
Amorphous Solids ◽  
Projection Formalism ◽  
Non Locality

Diffusion in Crystalline and Amorphous Solids

1985 ◽  
Vol 57 ◽  
Author(s):  
David Lazarus
Keyword(s):  
Point Defects ◽  
Amorphous Materials ◽  
Essential Role ◽  
Volume Diffusion ◽  
Bulk Diffusion ◽  
Amorphous Solids ◽  
Crystalline Solids ◽  
Simple Point ◽  
Diffusion Mechanisms

AbstractDecades of work by a wide variety of techniques were required to establish unambiguously the essential role of simple – and sometimes not so simple – “point” defects in mediating bulk diffusion in crystalline solids. Amorphous solids present new problems for establishing basic diffusion mechanisms. Most experimental techniques which work well for study of diffusion in crystalline solids are useless for study of amorphous materials because of their inherent nonequilibrium structures. A survey of some current results also gives a strong impression that more complex basic mechanisms than simple point defects may be required to account for volume diffusion in these materials.

scholarly journals From the Quantum to the Macroscopic Level: The Journey of Information Through Our Complex System

2020 ◽  
Author(s):  
Sara Diani
Keyword(s):  
Complex System ◽  
Quantum Potential ◽  
Point Of View ◽  
Hopfield Networks ◽  
Organizational Role ◽  
Global Computing ◽  
Initial Hypothesis ◽  
Quantum Phenomena ◽  
Non Locality

As a complex system, our body acts as a whole system connected to the environmental incitements. It is ordered, coherent, and tries to maintain the least possible entropy, saving the greatest amount of energy. In order to explain the dynamics of the systemic regulative network, a theoretical and speculative model is proposed, with a comprehensive approach that allows seeing the entire regulative system as a continuous unicuum. This paper covers two themes: 1) the connections between the quantum level and the classical one, through some principles of the QFT and through the Coherence Domains. The system is modeled as a field described by the wave function, with synchronous and consistent events, driven in a global computing by the quantum potential Q. The quantum potential implies the non-locality, and it needs only ultra-weak waves to occur, so it may explain how the rapid and global activation of the organism in response to perturbation/punctiform information works. The initial hypothesis is that some consistent quantum phenomena are amplified through the systemic regulative network until they become macroscopic observable. This is possible because of Coherence Domains. 2) The reactions of the different systemic networks to perturbations/punctiform information, with the attempt to model and measure information in biology, going beyond the Shannon and Turing theories. Hopfield Networks and an informational point of view are used to address the crucial informational and organizational role of proteins and nucleic acids.

scholarly journals God, Mind, Evolution, and Quantum Reality Based on Process Metaphysics

2016 ◽  
Vol 8 (2) ◽  
pp. 49-71
Author(s):  
Mark Germine
Keyword(s):  
Quantum Physics ◽  
Unsolved Problem ◽  
Self Determination ◽  
Scientific Models ◽  
Classical Physics ◽  
Process Metaphysics ◽  
Quantum Reality ◽  
External Relations ◽  
Non Locality

The genesis of actuality from potentiality, with the apparent role of the observer, is an important and unsolved problem which essentially defines science‟s view of reality in a variety of contexts. Observation then becomes lawful and not emergent. Panentheism is needed to provide a mechanism for order outside of blind efficient causality, in a Universal final causality. Classical physics is over a hundred years out of date, yet scientific models remain mechanistic and deterministic. Deism, a remnant of classical cosmology, is examined and rejected by scientists and philosophers, and certain pre-scientific notions of religion are scorned, putting the matter to rest. Quantum physics, in its basic form, is necessary if there is to be any philosophical or scientific notion of free will and self-determination, as potentiality. Quantum metaphysics is also needed because classical physics is fundamentally limited to localized external relations, lacking the internality and non-locality of relatedness. God, or the equivalent, is necessary to complete the equation. Physicists now tell us that reality is fundamentally mental and is created by observation. Observation is here taken to mean experience, with experience going all the way down to the lowest order of a Universal mentality.

On the Acoustics of Auditoria

1994 ◽  
Vol 1 (1) ◽  
pp. 27-48 ◽  
Author(s):  
H. Kuttruff
Keyword(s):  
Sound Propagation ◽  
Sound Field ◽  
Great Benefit ◽  
Room Acoustics ◽  
Short Introduction ◽  
New Developments ◽  
Sound Fields ◽  
Field Simulation ◽  
Basic Facts

The paper presents a short introduction into auditorium acoustics and reports on a few new developments in this field, which are believed to be of great benefit both for the acoustical design of auditoria and for research in practical room acoustics. The first part describes in a rather elementary way the basic facts of sound propagation in enclosures, including the effects of reflections and the role of reverberation. Furthermore, some of the numerous objective parameters are discussed which have been introduced in order to characterize particular aspects of sound fields. In the second part, recently developed methods of sound field simulation are described by which such parameters can be predicted. Methods of “auralization” are briefly discussed by which aural impressions from non-existing halls can be created on the basis of digital sound field simulation.

scholarly journals The role of sound propagation in concentrated colloidal suspensions

2002 ◽  
Vol 116 (13) ◽  
pp. 5867-5876 ◽  
Author(s):  
A. F. Bakker ◽  
C. P. Lowe
Keyword(s):  
Sound Propagation ◽  
Colloidal Suspensions
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