Results for 'Spin evolution'

999 found
Order:
  1.  13
    Spin polarization effects and their time evolutions.A. Vernes & P. Weinberger - 2015 - Philosophical Magazine 95 (10):1125-1138.
  2.  14
    Bad luck and cancer: Does evolution spin the wheel of fortune?Benjamin Roche, Beata Ujvari & Frédéric Thomas - 2015 - Bioessays 37 (6):586-587.
    Graphical AbstractCancer is a complex disease, with sophisticated cellular mechanisms as the targets of evolutionary processes driven by random genetic and epigenetic mutations. Oncogenesis is evolutionarily linked to stem cell numbers/mutations and organ/body size; therefore, inter-disciplinary frameworks across different scales (cellular, tissue, organs and species) are necessary to decipher cancer progression.
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  3.  35
    The Academic Spin-Offs as an Engine of Economic Transition in Eastern Europe. A Path-Dependent Approach.Ivan Tchalakov, Tihomir Mitev & Venelin Petrov - 2010 - Minerva 48 (2):189-217.
    The paper questions some of the premises in studying academic spin-offs in developed countries, claiming that when taken as characteristics of ‘academic spin-offs per se,’ they are of little help in understanding the phenomenon in the Eastern European countries during the transitional and post-transitional periods after 1989. It argues for the necessity of adopting a path-dependent approach, which takes into consideration the institutional and organisational specificities of local economies and research systems and their evolution, which strongly influence (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  4.  41
    Evolution of Different Dual-use Concepts in International and National Law and Its Implications on Research Ethics and Governance.Johannes Rath, Monique Ischi & Dana Perkins - 2014 - Science and Engineering Ethics 20 (3):769-790.
    This paper provides an overview of the various dual-use concepts applied in national and international non-proliferation and anti-terrorism legislation, such as the Biological and Toxin Weapons Convention, the Chemical Weapons Convention and United Nations Security Council Resolution 1540, and national export control legislation and in relevant codes of conduct. While there is a vast literature covering dual-use concepts in particular with regard to life sciences, this is the first paper that incorporates into such discussion the United Nations Security Council Resolution (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   4 citations  
  5. The Unfolding of a New Vision of Life, Cosmos and Evolution.Agustin Ostachuk - 2020 - Ludus Vitalis 28 (53):81-83.
    Has science already answered the fundamental questions about the concepts of Life, Cosmos and Evolution? Has science not relegated these fundamental questions by following up on more immediate, “useful” and practical endeavors that ultimately ensure that the wheel of capitalism keeps spinning in its frantic search for material and economic progress? There is something terribly wrong with the current theory of evolution, understood as the Darwinian theory with its successive versions and extensions. The concept of natural selection, the (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  6.  80
    Rhapsodic evolution: Essay on exaptation and evolutionary pluralism.Telmo Pievani - 2002 - World Futures 59 (2):63 – 81.
    Since formulating the theory of punctuated equilibria in 1972, a group of prominent evolutionary biologists, geneticists, and paleontologists have contributed towards a significant reinterpretation of the neo-Darwinian image of evolution that had consolidated during the second half of the twentieth century. We believe a research program, which we might define as "evolutionary pluralism" or "post-Darwinism," has been outlined, one that is centered on the discovery of the complexity and multiplicity of elements that work together to produce changes in our (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  7. Vigier III.Spin Foam Spinors & Fundamental Space-Time Geometry - 2000 - Foundations of Physics 30 (1).
  8.  33
    Relativistic Bohmian Trajectories and Klein-Gordon Currents for Spin-0 Particles.M. Alkhateeb & A. Matzkin - 2022 - Foundations of Physics 52 (5):1-13.
    It is generally believed that the de Broglie-Bohm model does not admit a particle interpretation for massive relativistic spin-0 particles, on the basis that particle trajectories cannot be defined. We show this situation is due to the fact that in the standard representation of the Klein-Gordon equation the wavefunction systematically contains superpositions of particle and anti-particle contributions. We argue that by working in a Foldy-Wouthuysen type representation uncoupling the particle from the anti-particle evolutions, a positive conserved density for a (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  9.  27
    A first-order equation for spin in a manifestly relativistically covariant quantum theory.A. Arensburg & L. P. Horwitz - 1992 - Foundations of Physics 22 (8):1025-1039.
    Relativistic quantum mechanics has been formulated as a theory of the evolution ofevents in spacetime; the wave functions are square-integrable functions on the four-dimensional spacetime, parametrized by a universal invariant world time τ. The representation of states with spin is induced with a little group that is the subgroup of O(3, 1) leaving invariant a timelike vector nμ; a positive definite invariant scalar product, for which matrix elements of tensor operators are covariant, emerges from this construction. In a (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   3 citations  
  10.  18
    Unitary state preparation, local position measurements, and spin in quantum mechanics.K. Kong Wan & R. G. McLean - 1994 - Foundations of Physics 24 (5):715-737.
    The orthodox presentation of quantum theory often includes statements on state preparation and measurements without mentioning how these processes can be achieved. The often quoted projection postulate is regarded by many as problematical. This paper presents a systematic framework for state preparation and measurement. Within the existing Hilbert space formulation of quantum mechanics for spinless particles we show that it is possible (1)to prepare an arbitrary state and (2)to reduce all quantum measurements to local position measurements in an asymptotic way (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  11.  37
    Extended Lifetime in Computational Evolution of Isolated Black Holes.Matthew Anderson & Richard A. Matzner - 2005 - Foundations of Physics 35 (9):1477-1495.
    Solving the 4-d Einstein equations as evolution in time requires solving equations of two types: the four elliptic initial data (constraint) equations, followed by the six second-order evolution equations. Analytically the constraint equations remain solved under the action of the evolution, and one approach is to simply monitor them (unconstrained evolution). The problem of the 3-d computational simulation of even a single isolated vacuum black hole has proven to be remarkably difficult. Recently, we have become aware (...)
    Direct download (9 more)  
     
    Export citation  
     
    Bookmark  
  12. The Social Trackways Theory of the Evolution of Human Cognition.Kim Shaw-Williams - 2014 - Biological Theory 9 (1):16-26.
    Only our lineage has ever used trackways reading to find unseen and unheard targets. All other terrestrial animals, including our great ape cousins, use scent trails and airborne odors. Because trackways as natural signs have very different properties, they possess an information-rich narrative structure. There is good evidence we began to exploit conspecific trackways in our deep past, at first purely associatively, for safety and orienteering when foraging in vast featureless wetlands. Since our own old trackways were recognizable they were (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   13 citations  
  13.  5
    Isotope effects on radical pair performance in cryptochrome: A new hypothesis for the evolution of animal migration.Ismael Galván, Abbas Hassasfar, Betony Adams & Francesco Petruccione - 2024 - Bioessays 46 (1):2300152.
    Mechanisms occurring at the atomic level are now known to drive processes essential for life, as revealed by quantum effects on biochemical reactions. Some macroscopic characteristics of organisms may thus show an atomic imprint, which may be transferred across organisms and affect their evolution. This possibility is considered here for the first time, with the aim of elucidating the appearance of an animal innovation with an unclear evolutionary origin: migratory behaviour. This trait may be mediated by a radical pair (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  14.  90
    Differentiable probabilities: A new viewpoint on spin, gauge invariance, gauge fields, and relativistic quantum mechanics. [REVIEW]R. Eugene Collins - 1996 - Foundations of Physics 26 (11):1469-1527.
    A new approach to developing formulisms of physics based solely on laws of mathematics is presented. From simple, classical statistical definitions for the observed space-time position and proper velocity of a particle having a discrete spectrum of internal states we derive u generalized Schrödinger equation on the space-time manifold. This governs the evolution of an N component wave function with each component square integrable over this manifold and is structured like that for a charged particle in an electromagnetic field (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  15.  12
    Spider flagelliform silk: lessons in protein design, gene structure, and molecular evolution.Cheryl Y. Hayashi & Randolph V. Lewis - 2001 - Bioessays 23 (8):750-756.
    Spiders spin multiple types of silks that are renowned for their superb mechanical properties. Flagelliform silk, used in the capture spiral of an orb‐web, is one of the few silks characterized by both cDNA and genomic DNA data. This fibroin is composed of repeating ensembles of three types of amino acid sequence motifs. The predominant subrepeat, GPGGX, likely forms a β‐turn, and tandem arrays of these turns are thought to create β‐spirals. These spring‐like helices may be critical for the (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  16.  26
    The Foundations of Quantum Mechanics and the Evolution of the Cartan-Kähler Calculus.Jose G. Vargas - 2008 - Foundations of Physics 38 (7):610-647.
    In 1960–1962, E. Kähler enriched É. Cartan’s exterior calculus, making it suitable for quantum mechanics (QM) and not only classical physics. His “Kähler-Dirac” (KD) equation reproduces the fine structure of the hydrogen atom. Its positron solutions correspond to the same sign of the energy as electrons.The Cartan-Kähler view of some basic concepts of differential geometry is presented, as it explains why the components of Kähler’s tensor-valued differential forms have three series of indices. We demonstrate the power of his calculus by (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  17. Editorial offices: The eugenics society■ 69 eccleston square■ london• swi• Victoria 2091.Society'S. Evolution - 1964 - The Eugenics Review 56:1.
     
    Export citation  
     
    Bookmark  
  18. Population, Des maladies dites «de civilisation», etc. Ne pourront PAS.Tendances Êvolutives des Systèmes Éducatifs - 1975 - Paideia 4:31.
     
    Export citation  
     
    Bookmark  
  19.  48
    Toward a science of other minds: Escaping the argument by analogy.Cognitive Evolution Group, Since Darwin, D. J. Povinelli, J. M. Bering & S. Giambrone - 2000 - Cognitive Science 24 (3):509-541.
    Since Darwin, the idea of psychological continuity between humans and other animals has dominated theory and research in investigating the minds of other species. Indeed, the field of comparative psychology was founded on two assumptions. First, it was assumed that introspection could provide humans with reliable knowledge about the causal connection between specific mental states and specific behaviors. Second, it was assumed that in those cases in which other species exhibited behaviors similar to our own, similar psychological causes were at (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   21 citations  
  20. Free will and determinism.On Free Will, Bio-Cultural Evolution Hans Fink, Niels Henrik Gregersen & Problem Torben Bo Jansen - 1991 - Zygon 26 (3):447.
  21.  91
    Clifford Algebras and the Dirac-Bohm Quantum Hamilton-Jacobi Equation.B. J. Hiley & R. E. Callaghan - 2012 - Foundations of Physics 42 (1):192-208.
    In this paper we show how the dynamics of the Schrödinger, Pauli and Dirac particles can be described in a hierarchy of Clifford algebras, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}${\mathcal{C}}_{1,3}, {\mathcal{C}}_{3,0}$\end{document}, and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}${\mathcal{C}}_{0,1}$\end{document}. Information normally carried by the wave function is encoded in elements of a minimal left ideal, so that all the physical information appears within the algebra itself. The state of the quantum process can be (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  22. Charles SUSANNE.Religions Et Rationalite & de L'évolution Humaine L'exemple - 2005 - Cahiers Internationaux de Symbolisme 110:139.
    No categories
     
    Export citation  
     
    Bookmark  
  23.  4
    Glaube im Kontext naturwissenschaftlicher Vernunft.Rainer Isak, Gèunter Altner, Tagung "Gottes Handeln In der Welt" & Tagung "Alles ist Evolution" (eds.) - 1997 - Freiburg i. Br.: Verlag Der Katholischen Akademie Der Erzdiozese Freiburg.
    Direct download  
     
    Export citation  
     
    Bookmark  
  24.  40
    Thomas Precession and the Bargmann-Michel-Telegdi Equation.Krzysztof Rȩbilas - 2011 - Foundations of Physics 41 (12):1800-1809.
    A direct method showing the Thomas precession for an evolution of any vector quantity (a spatial part of a four-vector) is proposed. A useful application of this method is a possibility to trace correctly the presence of the Thomas precession in the Bargmann-Michel-Telegdi equation. It is pointed out that the Thomas precession is not incorporated in the kinematical term of the Bargmann-Michel-Telegdi equation, as it is commonly believed. When the Bargmann-Michel-Telegdi equation is interpreted in curved spacetimes, this term is (...)
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark  
  25. Models and representation.Roman Frigg & James Nguyen - 2017 - In Magnani Lorenzo & Bertolotti Tommaso Wayne (eds.), Springer Handbook of Model-Based Science. Springer. pp. 49-102.
    Scientific discourse is rife with passages that appear to be ordinary descriptions of systems of interest in a particular discipline. Equally, the pages of textbooks and journals are filled with discussions of the properties and the behavior of those systems. Students of mechanics investigate at length the dynamical properties of a system consisting of two or three spinning spheres with homogenous mass distributions gravitationally interacting only with each other. Population biologists study the evolution of one species procreating at a (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   53 citations  
  26.  37
    Darwin's legacy. [REVIEW]Nathalie Gontier - 2010 - Theory in Biosciences 63.
    The year 2009 has been a year of numerous commemorations of both scientific and non-scientific achievements that contributed to the advancement of human kind. Protestants celebrated the 500th anniversary of the birth of Calvin; literary critics celebrated the 200th anniversary of the poet Edgar Allan Poe; and the musical genius Felix Mendelssohn-Bartholdy was also born 200 years ago. 2009 further marked the bicentennial of the birth of Louis Braille, the inventor of Braille; and Abraham Lincoln, the 16th president of the (...)
    Direct download  
     
    Export citation  
     
    Bookmark  
  27. Dual Aspect Framework for Consciousness and Its Implications: West meets East.Ram Lakhan Pandey Vimal - 2009 - In G. Derfer, Z. Wang & M. Weber (eds.), The Roar of Awakening. A Whiteheadian Dialogue Between Western Psychotherapies and Eastern Worldviews. Ontos Verlag. pp. 39.
    The extended dual-aspect monism framework of consciousness, based on neuroscience, consists of five components: (1) dual-aspect primal entities; (2) neural-Darwinism: co-evolution and co-development of subjective experiences (SEs) and associated neural-nets from the mental aspect (that carries the SEs/proto-experiences (PEs) in superposed and unexpressed form) and the material aspect (mass, charge, spin and space-time) of fundamental entities (elementary particles), respectively and co-tuning via sensorimotor interaction; (3) matching and selection processes: interaction of two modes, namely, (a) the non-tilde mode that (...)
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  28.  20
    Our animal condition and social construction.Jorge A. Colombo (ed.) - 2019 - New York, USA: NOVA Science Publisher.
    Which and how much of our current drives –individually and as a global community– are driven by ancestral, inherited traits or imprinted on our animal condition? An attempt to approximate this intriguing query is explored here. It pertains to our identity, social constructions, and our ecological interaction. The origin of our species has its roots in ancestral habits, behaviors and a survival drive, transformed from changing environmental conditions. We were not born in a mother-of-pearl cradle nor were protected by magical (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  29.  55
    Cartan–Weyl Dirac and Laplacian Operators, Brownian Motions: The Quantum Potential and Scalar Curvature, Maxwell’s and Dirac-Hestenes Equations, and Supersymmetric Systems. [REVIEW]Diego L. Rapoport - 2005 - Foundations of Physics 35 (8):1383-1431.
    We present the Dirac and Laplacian operators on Clifford bundles over space–time, associated to metric compatible linear connections of Cartan–Weyl, with trace-torsion, Q. In the case of nondegenerate metrics, we obtain a theory of generalized Brownian motions whose drift is the metric conjugate of Q. We give the constitutive equations for Q. We find that it contains Maxwell’s equations, characterized by two potentials, an harmonic one which has a zero field (Bohm-Aharonov potential) and a coexact term that generalizes the Hertz (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   4 citations  
  30.  92
    The Self-Evolving Cosmos: A Phenomenological Approach to Nature's Unity-in-Diversity.Steven M. Rosen - 2008 - World Scientific Publishing, Series on Knots and Everything.
    This book addresses two significant and interrelated problems confronting modern theoretical physics: the unification of the forces of nature and the evolution of the universe. In bringing out the inadequacies of the prevailing approach to these questions, the need is demonstrated for more than just a new theory. The meanings of space and time themselves must be radically rethought, which requires a whole new philosophical foundation. To this end, we turn to the phenomenological writings of Martin Heidegger and Maurice (...)
  31.  12
    Operating manual for spaceship earth.R. Buckminster Fuller - 1969 - [Carbondale,: Southern Illinois University Press.
    In this essay on man Mr. Fuller expresses what may well be his penultimate view of the human condition. Here, in a mood at once philosophical and involved, Mr. Fuller traces man’s intellectual evolution and weighs his capability for survival on this magnificent craft, this Spaceship Earth, this superbly designed sphere of almost negligible dimension in the great vastness of space. Mr. Fuller is optimistic that man will survive and, through research and development and increased industrialization, generate wealth so (...)
    Direct download  
     
    Export citation  
     
    Bookmark   10 citations  
  32. Michael Ruse's Design for Living.Robert J. Richards - 2004 - Journal of the History of Biology 37 (1):25 - 38.
    The eminent historian and philosopher of biology, Michael Ruse, has written several books that explore the relationship of evolutionary theory to its larger scientific and cultural setting. Among the questions he has investigated are: Is evolution progressive? What is its epistemological status? Most recently, in "Darwin and Design: Does Evolution have a Purpose?," Ruse has provided a history of the concept of teleology in biological thinking, especially in evolutionary theorizing. In his book, he moves quickly from Plato and (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   12 citations  
  33.  10
    Relativistic Quantum Mechanics.Lawrence P. Horwitz - 2015 - Dordrecht: Imprint: Springer.
    This book describes a relativistic quantum theory developed by the author starting from the E.C.G. Stueckelberg approach proposed in the early 40s. In this framework a universal invariant evolution parameter (corresponding to the time originally postulated by Newton) is introduced to describe dynamical evolution. This theory is able to provide solutions for some of the fundamental problems encountered in early attempts to construct a relativistic quantum theory. A relativistically covariant construction is given for which particle spins and angular (...)
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark   1 citation  
  34.  75
    On classical and quantum relativistic dynamics.F. Reuse - 1979 - Foundations of Physics 9 (11-12):865-882.
    A canonical formalism for the relativistic classical mechanics of many particles is proposed. The evolution equations for a charged particle in an electromagnetic field are obtained and the relativistic two-body problem with an invariant interaction is treated. Along the same line a quantum formalism for the spinless relativistic particle is obtained by means of imprimitivity systems according to Mackey theory. A quantum formalism for the spin-1/2 particle is constructed and a new definition of spin1/2 in relativity is proposed. (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   7 citations  
  35.  10
    Quantum Uncertainty Dynamics.Md Manirul Ali - 2023 - Foundations of Physics 53 (1):1-20.
    Quantum uncertainty relations have deep-rooted significance in the formalism of quantum mechanics. Heisenberg’s uncertainty relations attracted a renewed interest for its applications in quantum information science. Following the discovery of the Heisenberg uncertainty principle, Robertson derived a general form of Heisenberg’s uncertainty relations for a pair of arbitrary observables represented by Hermitian operators. In the present work, we discover a temporal version of the Heisenberg–Robertson uncertainty relations for the measurement of two observables at two different times, where the dynamical uncertainties (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  36.  43
    Kenneth Burke, John Dewey, and the pursuit of the public.Paul Stob - 2005 - Philosophy and Rhetoric 38 (3):226-247.
    In lieu of an abstract, here is a brief excerpt of the content:Kenneth Burke, John Dewey, and the Pursuit of the PublicPaul StobIn Deliberation Day, Bruce Ackerman and James Fishkin argue for the creation of a national holiday, "Deliberation Day," in which citizens come together over a two-day period in their local schools and community centers to deliberate over the merits of presidential candidates and their platforms (Ackerman and Fishkin 2004). While Ackerman and Fishkin propose that the government pay each (...)
    Direct download (10 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  37.  12
    Schopenhauer and the Nature of Philosophy by Jonathan Head (review).Judith Norman - 2023 - Journal of the History of Philosophy 61 (3):528-530.
    In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Schopenhauer and the Nature of Philosophy by Jonathan HeadJudith NormanJonathan Head. Schopenhauer and the Nature of Philosophy. Lanham, MD: Lexington Books, 2021. Pp. xviii + 183. Hardback, $95.00.It is a bit strange to read an overview of Schopenhauer's philosophy that does not center on the obvious and attention-grabbing idea of will, but Jonathan Head has brought a fresh and welcome perspective to the topic by focusing instead on (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  38.  8
    Policy and the Political Life of Music Education ed. by Patrick Schmidt and Richard Colwell (review).Hung-Pai Chen - 2018 - Philosophy of Music Education Review 26 (2):217.
    In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Policy and the Political Life of Music Education ed. by Patrick Schmidt and Richard ColwellHung-Pai ChenPatrick Schmidt and Richard Colwell, eds., Policy and the Political Life of Music Education (Oxford: Oxford University Press, 2017)Policy and the Political Life of Music Education is a collection of discourses regarding music education policy and its practice across a wide range of perspectives and geographical background. The book, edited by Patrick Schmidt (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  39.  30
    Decoherence and Determinism in a One-Dimensional Cloud-Chamber Model.Jean-Marc Sparenberg & David Gaspard - 2018 - Foundations of Physics 48 (4):429-439.
    The hypothesis that the particular linear tracks appearing in the measurement of a spherically-emitting radioactive source in a cloud chamber are determined by the positions of atoms or molecules inside the chamber is further explored in the framework of a recently established one-dimensional model. In this model, meshes of localized spins 1/2 play the role of the cloud-chamber atoms and the spherical wave is replaced by a linear superposition of two wave packets moving from the origin to the left and (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  40.  27
    Temps officiels et disponibilités temporelles des travailleurs de la recherche académique et industrielle.Caroline Lanciano-Morandat - 2013 - Temporalités 18.
    Cet article propose une réflexion sur les activités de recherche à partir de laboratoires industriels et académiques et d’organisations « intermédiaires » (laboratoires communs ; spin offs etc.). Les observations faites ponctuellement depuis une vingtaine d’années dans des laboratoires de chimie et de biologie montrent qu’elles sont l’objet d’une compétition accrue au niveau mondial entre différentes institutions et entre individus. La première hypothèse de l’article est que cette concurrence exacerbée entre entreprises, entre laboratoires académiques, entre scientifiques conduit à des (...)
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark  
  41.  20
    Quelques aspects théoriques de la notion de complémentarité I. la complémentarité de Bohr.Jean-Louis Destouches - 1948 - Dialectica 2 (3‐4):351-382.
    RésuméLes aspects théoriques les plus fondamentaux de la notion de complémentarité sont successivement étudiés.Dans la première partie la notion de complémentarité de Bohr est précisée et on montre de quelle façon cette notion est venue profoundément modifier les conceptions physiques. Dans une seconde partie la théorie générale des prévisions est résumée et ses principaux résultats sont énoncés pour permettre de mener ? une façon précise une discussion sur la notion de complémentarité: le problème des prévisions est ? abord posé, puis (...)
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark  
  42. Objects as Temporary Autonomous Zones.Tim Morton - 2011 - Continent 1 (3):149-155.
    continent. 1.3 (2011): 149-155. The world is teeming. Anything can happen. John Cage, “Silence” 1 Autonomy means that although something is part of something else, or related to it in some way, it has its own “law” or “tendency” (Greek, nomos ). In their book on life sciences, Medawar and Medawar state, “Organs and tissues…are composed of cells which…have a high measure of autonomy.”2 Autonomy also has ethical and political valences. De Grazia writes, “In Kant's enormously influential moral philosophy, autonomy (...)
     
    Export citation  
     
    Bookmark  
  43.  35
    Glimmers of a Pre-geometric Perspective.Federico Piazza - 2010 - Foundations of Physics 40 (3):239-266.
    Spacetime measurements and gravitational experiments are made by using objects, matter fields or particles and their mutual relationships. As a consequence, any operationally meaningful assertion about spacetime is in fact an assertion about the degrees of freedom of the matter (i.e. non gravitational) fields; those, say for definiteness, of the Standard Model of particle physics. As for any quantum theory, the dynamics of the matter fields can be described in terms of a unitary evolution of a state vector in (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  44.  40
    Physique quantique revue et completée.C. Piron - 2003 - Foundations of Science 8 (2):201-212.
    En nous laissant guider par la notion de champ qui en faitdomine toute la physique nous définissons la nature physique d'un système, ses propriétés et ses états possibles. Nous proposons alors un cadre très générale permettant la description de telssystèmes et la construction de modèles consistants.Nous en donnons des exemples et pour illustrer les concepts de notrethéorie nous décrivons différents types d'évolutions. Pour terminer nous discutons en détails unprocessus physique, les échos de spins.
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  45.  34
    The universe: A birth far from equilibrium? [REVIEW]Jules Géheniau, Edgard Gunzig & Isabelle Stengers - 1987 - Foundations of Physics 17 (6):585-601.
    The scientific world is, as I have often repeated, a shadow world, shadowing a world familiar to our consciousness. Just how much do we expect it to shadow? We do not expect it to shadow all that is in our mind, emotions, memory, etc. In the main we expect it to shadow impressions which can be traced to external sense organs. But time makes a dual entry and thus forms an intermediate link between the internal and the external. This is (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  46. Spin as a Determinable.Johanna Wolff - 2015 - Topoi 34 (2):379-386.
    In this paper I aim to answer two questions: Can spin be treated as a determinable? Can a treatment of spin as a determinable be used to understand quantum indeterminacy? In response to the first question I show that the relations among spin number, spin components and spin values cannot be captured by a single determination relation; instead we need to look at spin number and spin value separately. In response to the second (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   21 citations  
  47. Connecting Spin and Statistics in Quantum Mechanics.Arthur Jabs - 2014 - arXiv:0810.2399.
    The spin-statistics connection is derived in a simple manner under the postulates that the original and the exchange wave functions are simply added, and that the azimuthal phase angle, which defines the orientation of the spin part of each single-particle spin-component eigenfunction in the plane normal to the spin-quantization axis, is exchanged along with the other parameters. The spin factor (−1)2s belongs to the exchange wave function when this function is constructed so as to get (...)
    Direct download (7 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  48.  4
    Spin Glasses: Criticality and Energy Landscapes.Marco Baity Jesi - 2016 - Cham: Imprint: Springer.
    This thesis addresses the surprising features of zero-temperature statics and dynamics of several spin glass models, including correlations between soft spins that arise spontaneously during avalanches, and the discovery of localized states that involve the presence of two-level systems. It also presents the only detailed historiographical research on the spin glass theory. Despite the extreme simplicity of their definition, spin glasses display a wide variety of non-trivial behaviors that are not yet fully understood. In this thesis the (...)
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark  
  49.  15
    Spin and Wind Directions I: Identifying Entanglement in Nature and Cognition.Robrecht Vanderbeeken & Frederik Le Roy - 2018 - Foundations of Science 23 (2):323-335.
    We present a cognitive psychology experiment where participants were asked to select pairs of spatial directions that they considered to be the best example of Two different wind directions. Data are shown to violate the CHSH version of Bell’s inequality with the same magnitude as in typical Bell-test experiments with entangled spins. Wind directions thus appear to be conceptual entities connected through meaning, in human cognition, in a similar way as spins appear to be entangled in experiments conducted in physics (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   9 citations  
  50.  32
    Spin and Wind Directions I: Identifying Entanglement in Nature and Cognition.Diederik Aerts, Jonito Aerts Arguëlles, Lester Beltran, Suzette Geriente, Massimiliano Sassoli de Bianchi, Sandro Sozzo & Tomas Veloz - 2018 - Foundations of Science 23 (2):323-335.
    We present a cognitive psychology experiment where participants were asked to select pairs of spatial directions that they considered to be the best example of Two different wind directions. Data are shown to violate the CHSH version of Bell’s inequality with the same magnitude as in typical Bell-test experiments with entangled spins. Wind directions thus appear to be conceptual entities connected through meaning, in human cognition, in a similar way as spins appear to be entangled in experiments conducted in physics (...)
    Direct download (7 more)  
     
    Export citation  
     
    Bookmark   10 citations  
1 — 50 / 999