Results for 'vacuum'

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  1. The Philosophy of Vacuum.Simon Saunders & Harvey R. Brown (eds.) - 1991 - Oxford University Press.
    The vacuum is fast emerging as the central structure of modern physics. This collection brings together philosophically-minded specialists who engage these issues in the context of classical gravity, quantum electrodynamics, and the grand unification program. The vacuum emerges as the synthesis of concepts of space, time, and matter; in the context of relativity and the quantum this new synthesis represents a structure of the most intricate and novel complexity. This book is a work in modern metaphysics, in which (...)
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  2. Polarizable-Vacuum (PV) Approach to General Relativity.H. E. Puthoff - 2002 - Foundations of Physics 32 (6):927-943.
    Standard pedagogy treats topics in general relativity (GR) in terms of tensor formulations in curved space-time. An alternative approach based on treating the vacuum as a polarizable medium is presented here. The polarizable vacuum (PV) approach to GR, derived from a model by Dicke and related to the “THεμ” formalism used in comparative studies of gravitational theories, provides additional insight into what is meant by a curved metric. While reproducing the results predicted by GR for standard (weak-field) astrophysical (...)
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  3. The Vacuum in Relativistic Quantum Field Theory.Michael Redhead - 1994 - PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association 1994:77 - 87.
    The status of the vacuum in relativistic quantum field theory is examined. A sharp distinction arises between the global vacuum and the local vacuum. The concept of local number density is critically assessed. The global vacuum state implies fluctuations for all local observables. Correlations between such fluctuations in space-like separated regions of space-time are discussed and the existence of correlations which are maximal in a certain sense is remarked on, independently of how far apart those regions (...)
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  4.  71
    Vacuum Energy as the Origin of the Gravitational Constant.Durmuş A. Demir - 2009 - Foundations of Physics 39 (12):1407-1425.
    We develop a geometro-dynamical approach to the cosmological constant problem (CCP) by invoking a geometry induced by the energy-momentum tensor of vacuum, matter and radiation. The construction, which utilizes the dual role of the metric tensor that it structures both the spacetime manifold and energy-momentum tensor of the vacuum, gives rise to a framework in which the vacuum energy induced by matter and radiation, instead of gravitating, facilitates the generation of the gravitational constant. The non-vacuum sources (...)
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  5. Vacuum.Stephan Hartmann - 2001 - In H. Gründer (ed.), Historisches Wörterbuch der Philosophie. Schwabe.
    Vacuum (leer, frei) bezeichnete bis zum 19. Jahrhundert allein den körperlosen Raum. Unter dem Einfluss physikalischer (Feld-) Theorien meint der Terminus inzwischen diejenige residuale physische Entiät, die einen vorgegebenen Raum ausfüllt bzw. im Prinzip ausfüllen würde, nachdem alles, was mit physikalischen Mitteln entfernt werden kann, aus dem Raum entfernt wurde. Theorien über das V. sind daher eng mit Theorien über die Struktur des Raumes, die Bewegung, die physikalischen Gegenstände und deren Wechselwirkungen verbunden. In der Quantentheorie bezeichnet V. den Zustand (...)
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  6.  57
    Vacuum Genesis oraz spontaniczne powstanie wszechświata z niczego a klasyczna koncepcja przyczynowości oraz stworzenia ex nihilo.Mariusz Tabaczek - 2019 - Scientia et Fides 7 (1):127-162.
    Vacuum Genesis and Spontaneous Emergence of the Universe from Nothing in Reference to the Classical Notion of Causality and Creation ex nihilo The article discousses philosophical and theological reflections inspired by the cosmological model of the origin of the universe from quantum vacuum through quantum tunneling and the model presented by Hartle and Hawking. In the context of the thesis about the possibility of cosmogenesis ex nihilo without the need of God the creator, the question is being raised (...)
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  7.  29
    Fast Vacuum Fluctuations and the Emergence of Quantum Mechanics.Gerard ’T. Hooft - 2021 - Foundations of Physics 51 (3):1-24.
    Fast moving classical variables can generate quantum mechanical behavior. We demonstrate how this can happen in a model. The key point is that in classically evolving systems one can still define a conserved quantum energy. For the fast variables, the energy levels are far separated, such that one may assume these variables to stay in their ground state. This forces them to be entangled, so that, consequently, the slow variables are entangled as well. The fast variables could be the (...) fluctuations caused by unknown super heavy particles. The emerging quantum effects in the light particles are expressed by a Hamiltonian that can have almost any form. The entire system is ontological, and yet allows one to generate interference effects in computer models. This seemed to lead to an inexplicable paradox, which is now resolved: exactly what happens in our models if we run a quantum interference experiment in a classical computer is explained. The restriction that very fast variables stay predominantly in their ground state appears to be due to smearing of the physical states in the time direction, preventing their direct detection. Discussions are added of the emergence of quantum mechanics, and the ontology of an EPR/Bell Gedanken experiment. (shrink)
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  8.  8
    A Vacuum in Political and Economic Labor Policy?Robert A. Karasek - 2004 - Bulletin of Science, Technology and Society 24 (4):353-365.
    A vacuum is arising in the social policy of advanced countries. It is due to the fact that both of the currently dominant bases for social policy, market-oriented policy, and its presumed antagonist, welfare state policy, have the same and an insufficiently broad production value model at their core. The solution is to create a true new alternative, work quality policy, based on a re-understanding of work organization and the alternative forms of value it can create. Understanding work organization’s (...)
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  9.  18
    Linguistic vacuum prevalent in margin/centre polemic.Sadia Riaz & Farhan Ebadat Yar Khan - 2016 - Journal of Social Sciences and Humanities 55 (2):17-28.
    The research paper addresses the unresolved linguistic vacuum that accounts for the authorial and fictional abrogation and appropriation of language in Lessing’s works. This research paper attempts to take a holistic view of these implications. Lessing has used a number of methods to overcome this inadequacy and the abrogation and appropriation of language thus seen is clearly evident in her novel The Grass is Singing. The concepts of hegemony of language by the colonizers and their control over the means (...)
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  10. Quantum vacuum noise in physics and cosmology.Paul Davies - manuscript
    The concept of the vacuum in quantum field theory is a subtle one. Vacuum states have a rich and complex set of properties that produce distinctive, though usually exceedingly small, physical effects. Quantum vacuum noise is familiar in optical and electronic devices, but in this paper I wish to consider extending the discussion to systems in which gravitation, or large accelerations, are important. This leads to the prediction of vacuum friction: The quantum vacuum can act (...)
     
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  11. Vacuum Radiation, Entropy, and Molecular Chaos.Jean E. Burns - 2007 - Foundations of Physics 37 (12):1727-1737.
    Vacuum radiation causes a particle to make a random walk about its dynamical trajectory. In this random walk the root mean square change in spatial coordinate is proportional to t 1/2, and the fractional changes in momentum and energy are proportional to t −1/2, where t is time. Thus the exchange of energy and momentum between a particle and the vacuum tends to zero over time. At the end of a mean free path the fractional change in momentum (...)
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  12. The Vacuum as Ether in the Last Century.M. Barone - 2004 - Foundations of Physics 34 (12):1973-1982.
    In this paper we review the evolution of the concept of “ vacuum ” according to different theories formulated in the last century, like Quantum Mechanics, Quantum Electrodynamics, Quantum Chromodynamics in Particle Physics and Cosmology. In all these theories a metastable vacuum state is considered which transforms from one state to another according to the energy taken into consideration. It is a “fluid” made up by matter and radiation present in the whole Universe, which may be identified with (...)
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  13.  60
    The Vacuum Electromagnetic Fields and the Schrödinger Equation.A. J. Faria, H. M. França, G. G. Gomes & R. C. Sponchiado - 2007 - Foundations of Physics 37 (8):1296-1305.
    We consider the simple case of a nonrelativistic charged harmonic oscillator in one dimension, to investigate how to take into account the radiation reaction and vacuum fluctuation forces within the Schrödinger equation. The effects of both zero-point and thermal classical electromagnetic vacuum fields, characteristic of stochastic electrodynamics, are separately considered. Our study confirms that the zero-point electromagnetic fluctuations are dynamically related to the momentum operator p=−i ℏ ∂/∂ x used in the Schrödinger equation.
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  14. Vacuum or holomovement.B. J. Hiley - 1991 - In Simon Saunders & Harvey R. Brown (eds.), The Philosophy of Vacuum. Oxford University Press. pp. 217--249.
     
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  15.  39
    Hydrodynamics of the Physical Vacuum: II. Vorticity Dynamics.Valeriy I. Sbitnev - 2016 - Foundations of Physics 46 (10):1238-1252.
    Physical vacuum is a special superfluid medium populated by enormous amount of virtual particle-antiparticle pairs. Its motion is described by the modified Navier–Stokes equation: the pressure gradient divided by the mass density is replaced by the gradient from the quantum potential; time-averaged the viscosity vanishes, but its variance is not zero. Vortex structures arising in this medium show infinitely long lifetime owing to zero average viscosity. The nonzero variance is conditioned by exchanging the vortex energy with zero-point vacuum (...)
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  16.  46
    Probing the Vacuum of Particle Physics with Precise Laser Interferometry.Maurizio Consoli - 2015 - Foundations of Physics 45 (1):22-43.
    The discovery of the Higgs boson at LHC confirms that what we experience as empty space should actually be thought as a condensate of elementary quanta. This condensate characterizes the physically realized form of relativity and could play the role of preferred reference frame in a modern Lorentzian approach. This observation suggests a new interpretative scheme to understand the unexplained residuals in the old ether-drift experiments where light was still propagating in gaseous systems. Differently from present vacuum experiments, where (...)
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  17.  12
    On Vacuum Twisting Type-N Again.Jerzy F. Plebański & Maciej Przanowski - 2003 - In A. Ashtekar (ed.), Revisiting the Foundations of Relativistic Physics. Springer. pp. 361--373.
  18.  46
    On Vacuum Fluctuations and Particle Masses.M. D. Pollock - 2012 - Foundations of Physics 42 (10):1300-1328.
    The idea that the mass m of an elementary particle is explained in the semi-classical approximation by quantum-mechanical zero-point vacuum fluctuations has been applied previously to spin-1/2 fermions to yield a real and positive constant value for m, expressed through the spinorial connection Γ i in the curved-space Dirac equation for the wave function ψ due to Fock. This conjecture is extended here to bosonic particles of spin 0 and spin 1, starting from the basic assumption that all fundamental (...)
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  19.  49
    Hydrodynamics of the Physical Vacuum: I. Scalar Quantum Sector.Valeriy I. Sbitnev - 2016 - Foundations of Physics 46 (5):606-619.
    Physical vacuum is a special superfluid medium. Its motion is described by the Navier–Stokes equation having two slightly modified terms that relate to internal forces. They are the pressure gradient and the dissipation force because of viscosity. The modifications are as follows: the pressure gradient contains an added term describing the pressure multiplied by the entropy gradient; time-averaged viscosity is zero, but its variance is not zero. Owing to these modifications, the Navier–Stokes equation can be reduced to the Schrödinger (...)
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  20. Quantum vacuum instability near rotating stars.P. C. W. Davies - unknown
    We discuss the Starobinskii-Unruh process for the Kerr black hole. We show how this effect is related to the theory of squeezed states. We then consider a simple model for a highly relativistic rotating star and show that the Starobinskii-Unruh effect is absent.
     
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  21. The vacuum and unification.I. J. R. Aitchison - 1991 - In Simon Saunders & Harvey R. Brown (eds.), The Philosophy of Vacuum. Oxford University Press. pp. 159--196.
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  22.  11
    Colossal Vacuums: Kierkegaard and the Rise of the Public in the Anthropocene.Niels Wilde - 2022 - Kierkegaard Studies Yearbook 27 (1):243-263.
    In this paper, I argue that the debate in the environmental humanities about the reconceptualization of the human being as one vs. many in light of the Anthropocene, resembles the very structure of Kierkegaard’s notion of the public as a compound object composed of individuals. Further, I argue that the public provides not only a model for understanding the ontological makeup of the Anthropos but also serves as an early version of it. Hence, the public plays a role in the (...)
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  23. False Vacuum: Early Universe Cosmology and the Development of Inflation.Chris Smeenk - 2005 - In Eisenstaedt Jean & Knox A. J. (eds.), The Universe of General Relativity. Birkhauser. pp. 223-257.
  24. The quantum vacuum: a scientific and philosophical concept, from electrodynamics to string theory and the geometry of the microscopic world.Luciano Boi - 2011 - Baltimore: Johns Hopkins University Press.
    Acclaimed mathematical physicist and natural philosopher Luciano Boi expounds the quantum vacuum, exploring the meaning of nothingness and its relationship with ...
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  25.  11
    Vacuum Polarisation Without Infinities.Dirk-André Deckert, Franz Merkl & Markus Nöth - 2024 - In Angelo Bassi, Sheldon Goldstein, Roderich Tumulka & Nino Zanghi (eds.), Physics and the Nature of Reality: Essays in Memory of Detlef Dürr. Springer. pp. 249-265.
    In honour of Detlef Dürr, we report on a mathematical rigorous computation of the electric vacuum polarisation current and extract the well-known expression for the second order perturbation. Intermediate steps in the presented calculation demonstrate, to the knowledge of the authors for the first time, mathematical rigorous versions of the combined dimensional and Pauli-Villars regularisation schemes. These are employed as computational tools to infer convenient integral representations during the computation. The said second order expression is determined up to a (...)
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  26.  94
    Vacuum Polarization in Self-Field Quantum Electrodynamics.I. Açikgöz & N. Ünal - 1998 - Foundations of Physics 28 (5):815-828.
    We have evaluated analytically the vacuum polarization in a Coulomb field using the relativistic Dirac-Coulomb wave functions by a new method. The result is made finite by an appropriate choice of contour integrations and gives the standard result in the lowest order of iteration. We used the formalism of self-field quantum electrodynamics in the evaluation of the vacuum polarization which needs neither field quantization nor renormalization. There are no infrared or ultraviolet divergences.
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  27.  73
    Vacuum Condensates and the Anomalous Magnetic Moment of a Dirac Fermion.Victor Elias, Kevin B. Sprague & Ying Xue - 2000 - Foundations of Physics 30 (3):439-461.
    We address anticipated fermion–antifermion and dimension-4 gauge-field vacuum-condensate contributions to the magnetic portion of the fermion–photon vertex function in the presence of a vacuum with nonperturbative content, such as that of QCD. We discuss how inclusion of such condensate contributions may lead to a vanishing anomalous magnetic moment, in which case vacuum condensates may account for the apparent consistency between constituent quark masses characterizing baryon magnetic moments and those characterizing baryon spectroscopy.
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  28. Detecting the rotating quantum vacuum.Paul Davies - manuscript
    We derive conditions for rotating particle detectors to respond in a variety of bounded spacetimes and compare the results with the folklore that particle detectors do not respond in the vacuum state appropriate to their motion. Applications involving possible violations of the second law of thermodynamics are briefly addressed.
     
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  29. The quantum vacuum and the cosmological constant problem.E. S. & H. Zinkernagel - 2002 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 33 (4):663-705.
    The cosmological constant problem arises at the intersection between general relativity and quantum field theory, and is regarded as a fundamental problem in modern physics. In this paper, we describe the historical and conceptual origin of the cosmological constant problem which is intimately connected to the vacuum concept in quantum field theory. We critically discuss how the problem rests on the notion of physically real vacuum energy, and which relations between general relativity and quantum field theory are assumed (...)
     
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  30. The Vacuum.John A. Hall - 1993 - Center for German and European Studies, University of California.
  31.  10
    Atoms, Vacuum and Omnipresent God. The Problem of Matter in the Philosophy of Clarke and Newton.Sławomir Raube - 2010 - Idea. Studia Nad Strukturą I Rozwojem Pojęć Filozoficznych 22:35-49.
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  32. Quantum vacuum friction.Paul Davies - manuscript
    The quantum vacuum may in certain circumstances be regarded as a type of fluid medium, or aether, exhibiting energy density, pressure, stress and friction. Vacuum friction may be thought of as being responsible for the spontaneous creation of particles from the vacuum state when the system is non-stationary. Examples include the expanding universe, rotating black holes, moving mirrors, atoms passing close to surfaces, and the activities of sub-cellular biosystems. The concept of vacuum friction will be reviewed (...)
     
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  33.  21
    Polarization of Vacuum Fluctuations: Source of the Vacuum Permittivity and Speed of Light.G. B. Mainland & Bernard Mulligan - 2020 - Foundations of Physics 50 (5):457-480.
    There are two types of fluctuations in the quantum vacuum: type 1 vacuum fluctuations are on shell and can interact with matter in specific, limited ways that have observable consequences; type 2 vacuum fluctuations are off shell and cannot interact with matter. A photon will polarize a type 1, bound, charged lepton–antilepton vacuum fluctuation in much the same manner that it would polarize a dielectric, suggesting the method used here for calculating the permittivity $$\epsilon _{0}$$ϵ0 of (...)
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  34.  94
    Vacuum Concepts, Potentia, and the Quantum Field Theoretic Vacuum Explained for All.Paul Teller - 1993 - Midwest Studies in Philosophy 18 (1):332-342.
  35. Inequivalent Vacuum States and Rindler Particles.Robert Weingard & Barry Ward - 1998 - In Edgard Gunzig & Simon Diner (eds.), Le Vide: Univers du Tout et du Rien. Revue de l'Université de Bruxelles. pp. 241-255.
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  36. Reductio ad vacuum.Vicente Sanfélix Vidarte - 1995 - Anuario Filosófico 28 (2):311-334.
    Cartesianism was always a subject to Wittgenstein's criticism. In his case against it, he employed a general strategy that I have called "Reductio ad vacuum". There is something right in Cartesianism but without a hidden confusing premise, the truth of Cartesianism is empty. According to the early Wittgenstein, Cartesianism was right be-cause Solipsism is true: the Self is the center of the world. But without confusing this metaphysical Self with the psychological one, Solipsism becomes empty and no different from (...)
     
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  37. Filling the Gaps in Hume’s Vacuums.Miren Boehm - 2012 - Hume Studies 38 (1):79-99.
    The paper addresses two difficulties that arise in Treatise 1.2.5. First, Hume appears to be inconsistent when he denies that we have an idea of a vacuum or empty space yet allows for the idea of an “invisible and intangible distance.” My solution to this difficulty is to develop the overlooked possibility that Hume does not take the invisible and intangible distance to be a distance at all. Second, although Hume denies that we have an idea of a (...), some texts in Treatise 1.2.5 are taken by interpreters to suggest that Hume nonetheless believes that there are vacuums in nature. I discuss the relevant texts and defend the view that Hume does not in fact countenance belief in vacuums. I conclude by outlining an interpretation of Hume’s intention in the Treatise that allows us to understand his discussion of ideas as having implications for the sciences. (shrink)
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  38.  40
    Symmetry-breaking vacuum and state vector reduction.H. D. Zeh - 1975 - Foundations of Physics 5 (2):371-373.
    It is argued by means of analogy with certain irreversible processes that a symmetry-violating vacuum need not necessarily be explained by a special cosmic initial condition.
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  39.  63
    Vacuum structures in Hamiltonian light-front dynamics.F. Coester & W. Polyzou - 1994 - Foundations of Physics 24 (3):387-400.
    Hamiltonian light-front dynamics of quantum fields may provide a useful approach to systematic nonperturbative approximations to quantum field theories. We investigate inequivalent Hilbert-space representations of the light-front field algebra in which the stability group of the light front is implemented by unitary transformations. The Hilbert space representation of states is generated by the operator algebra from the vacuum state. There is a large class of vacuum states besides the Fock vacuum which meet all the invariance requirements. The (...)
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  40.  23
    Enhanced vacuum-photoconductivity of chemically synthesized ZnO nanostructures.Sayan Bayan, Sheo K. Mishra, Purushottam Chakraborty, Dambarudhar Mohanta, Ravi Shankar & Rajneesh K. Srivastava - 2014 - Philosophical Magazine 94 (9):914-924.
  41.  12
    Intrinsic Property, Quantum Vacuum, and Śūnyatā.Sisir Roy - 2019 - In Siddheshwar Rameshwar Bhatt (ed.), Quantum Reality and Theory of Śūnya. Springer. pp. 173-184.
    In modern physics, the properties like charge, spin, etc. of elementary entities like electron, proton, photon, etc. are considered to be “intrinsic properties” of the entity. Intrinsic properties are those properties that a thing possesses, irrespective of whether or not there are other contingent things. In Buddhist philosophy especially in Mādhyamik philosophy, no such concept of “intrinsic property” or svabhāva exists. The problem of origin of the universe baffled the scientists and philosophers for many centuries. Within the framework of general (...)
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  42.  91
    A Gedanken Spacecraft that Operates Using the Quantum Vacuum (Dynamic Casimir Effect).G. Jordan Maclay & Robert L. Forward - 2004 - Foundations of Physics 34 (3):477-500.
    Conventional rockets are not a suitable technology for interstellar missions. Chemical rockets require a very large weight of propellant, travel very slowly compared to light speed, and require significant energy to maintain operation over periods of years. For example, the 722 kg Voyager spacecraft required 13,600 kg of propellant to launch and would take about 80,000 years to reach the nearest star, Proxima Centauri, about 4.3 light years away. There have been various attempts at developing ideas on which one might (...)
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  43.  6
    Abortion by vacuum-aspiration method.J. Campbell - 1964 - The Eugenics Review 56 (3):129-130.
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  44.  75
    Hume on the Idea of a Vacuum.Lorne Falkenstein - 2014 - Hume Studies 39 (2):131-168.
    Hume had two principal arguments for denying that we can have an idea of a vacuum, an argument from the non-entity of unqualified points and an argument from the impossibility of forming abstract ideas of manners of disposition. He also made two serious concessions to the opposed view that we can indeed form ideas of vacua, namely, that bodies that have nothing sensible disposed between them may permit the interposition of other bodies without any apparent motion or occlusion and (...)
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  45.  25
    Regularizing (Away) Vacuum Energy.Adam Koberinski - 2021 - Foundations of Physics 51 (1):1-22.
    In this paper I formulate Minimal Requirements for Candidate Predictions in quantum field theories, inspired by viewing the standard model as an effective field theory. I then survey standard effective field theory regularization procedures, to see if the vacuum expectation value of energy density ) is a quantity that meets these requirements. The verdict is negative, leading to the conclusion that \ is not a physically significant quantity in the standard model. Rigorous extensions of flat space quantum field theory (...)
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  46.  16
    Vacuum Refraction Theory of Gravity.Joop F. Nieland & France Arles sur Tech - 1992 - Apeiron: Studies in Infinite Nature 13:33.
  47.  24
    Pneumatics, Automata and the Vacuum in the Work of Giambattista Aleotti.A. G. Keller - 1967 - British Journal for the History of Science 3 (4):338-347.
    In most of the more lively fields of physical enquiry in the first three decades of the seventeenth century, a striking contrast may be observed between the antiquity of the problems attacked, and the innovatory procedures applied to solve them. None of these questions, inherited from a past now remote, seemed more pressing than the time-honoured controversy of the plenum versus the vacuum, especially as the concept of the atomic structure of matter was so closely associated with the existence (...)
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  48.  59
    A Rotating Quantum Vacuum.V. A. De Lorenci & N. F. Svaiter - 1999 - Foundations of Physics 29 (8):1233-1264.
    We investigate how a uniformly rotating frame is defined as the rest frame of an observer rotating with constant angular velocity Ω around the z axis of an inertial frame. Assuming this frame to be a Lorentz one, we second quantize a free massless scalar field in the rotating frame and obtain that creation-annihilation operators of the field are not the same as those of an inertial frame. This leads to a new vacuum state—a rotating vacuum. After this, (...)
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  49. Narrativity and the Symbolic Vacuum.Stefan Lukits - 2011 - Philosophy and Theology 23 (1):167-183.
    “Narrativity and the Symbolic Vacuum” examines the descriptive and the prescriptive narrativity claim in the context of a claim that there are narratives in the biblical literature that resist both. The descriptive narrativity claim maintains that it is not an option for a person to conceive of their life without narrative coherence. The prescriptive claim holds that narrativity is a necessary condition for a good and successful human life. Phenomenological thought and Aristotelian virtue ethics, expressing a critical stance towards (...)
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  50.  1
    Two comments on the vacuum in algebraic quantum field theory.Meinard Kuhlmann, Holger Lyre & Andrew Wayne - 2002 - In Meinard Kuhlmann, Holger Lyre & Andrew Wayne (eds.), Ontological Aspects of Quantum Field Theory. Singapore: World Scientific.
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