Results for 'Quantum walk'

987 found
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  1.  26
    Quantum Walks, Weyl Equation and the Lorentz Group.Paolo Perinotti, Giacomo Mauro D’Ariano & Alessandro Bisio - 2017 - Foundations of Physics 47 (8):1065-1076.
    Quantum cellular automata and quantum walks provide a framework for the foundations of quantum field theory, since the equations of motion of free relativistic quantum fields can be derived as the small wave-vector limit of quantum automata and walks starting from very general principles. The intrinsic discreteness of this framework is reconciled with the continuous Lorentz symmetry by reformulating the notion of inertial reference frame in terms of the constants of motion of the quantum (...)
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  2.  95
    Quantum Walks in Brain Microtubules—A Biomolecular Basis for Quantum Cognition?Stuart Hameroff - 2014 - Topics in Cognitive Science 6 (1):91-97.
    Cognitive decisions are best described by quantum mathematics. Do quantum information devices operate in the brain? What would they look like? Fuss and Navarro () describe quantum lattice registers in which quantum superpositioned pathways interact (compute/integrate) as ‘quantum walks’ akin to Feynman's path integral in a lattice (e.g. the ‘Feynman quantum chessboard’). Simultaneous alternate pathways eventually reduce (collapse), selecting one particular pathway in a cognitive decision, or choice. This paper describes how quantum walks (...)
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  3.  6
    Directivity of Quantum Walk via Its Random Walk Replica.Tomoki Yamagami, Etsuo Segawa, Nicolas Chauvet, André Röhm, Ryoichi Horisaki & Makoto Naruse - 2022 - Complexity 2022:1-14.
    Quantum walks exhibit different properties compared with classical random walks, most notably by linear spreading and localization. In the meantime, random walks that replicate quantum walks, which we refer to as quantum-walk-replicating random walks, have been studied in the literature where the eventual properties of QWRW coincide with those of QWs. However, we consider that the unique attributes of QWRWs have not been fully utilized in the former studies to obtain deeper or new insights into QWs. (...)
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  4.  55
    Quantum Random Walks and Decision Making.Karthik H. Shankar - 2014 - Topics in Cognitive Science 6 (1):108-113.
    How realistic is it to adopt a quantum random walk model to account for decisions involving two choices? Here, we discuss the neural plausibility and the effect of initial state and boundary thresholds on such a model and contrast it with various features of the classical random walk model of decision making.
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  5.  5
    Tightrope-Walking Rationality in Action: Feyerabendian Insights for the Foundations of Quantum Mechanics.Daniele Oriti - forthcoming - International Studies in the Philosophy of Science:1-33.
    We scan Paul K. Feyerabend's work in philosophy of physics and of science more generally for insights that could be useful for the contemporary debate on the foundations of quantum mechanics. We take as our starting point what Feyerabend has actually written about quantum mechanics, but we extend our analysis to his general views on realism, objectivity, pluralism, and the relation between physics and philosophy, finding that these more general views could in fact offer many interesting insights for (...)
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  6. Quantum Random Walks.Lana Sheridan, Peter Olsar & Christoph Dankert - forthcoming - Studium.
     
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  7. Open Parallel Cooperative and Competitive Decision Processes: A Potential Provenance for Quantum Probability Decision Models.Ian G. Fuss & Daniel J. Navarro - 2013 - Topics in Cognitive Science 5 (4):818-843.
    In recent years quantum probability models have been used to explain many aspects of human decision making, and as such quantum models have been considered a viable alternative to Bayesian models based on classical probability. One criticism that is often leveled at both kinds of models is that they lack a clear interpretation in terms of psychological mechanisms. In this paper we discuss the mechanistic underpinnings of a quantum walk model of human decision making and response (...)
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  8.  87
    Walking the tightrope of the science and religion boundary.Salman Hameed - 2012 - Zygon 47 (2):337-342.
    AbstractIslam's Quantum Question by Nidhal Guessoum offers a sophisticated approach to reconciling the results of modern science with Islamic tradition. The book provides a valuable critique of existing literature on Islam and science and advocates the promotion of good science and science education in the Muslim world. A central tension in the book revolves around Guessoum's efforts to promote a version of theistic science, while at the same establishing a clear boundary for science and scientific methodology. Although the latter (...)
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  9.  23
    Weyl, Dirac and Maxwell Quantum Cellular Automata: Analitical Solutions and Phenomenological Predictions of the Quantum Cellular Automata Theory of Free Fields.Alessandro Bisio, Giacomo Mauro D’Ariano, Paolo Perinotti & Alessandro Tosini - 2015 - Foundations of Physics 45 (10):1203-1221.
    Recent advances on quantum foundations achieved the derivation of free quantum field theory from general principles, without referring to mechanical notions and relativistic invariance. From the aforementioned principles a quantum cellular automata theory follows, whose relativistic limit of small wave-vector provides the free dynamics of quantum field theory. The QCA theory can be regarded as an extended quantum field theory that describes in a unified way all scales ranging from an hypothetical discrete Planck scale up (...)
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  10. Wavefunction Collapse and Random Walk.Brian Collett & Philip Pearle - 2003 - Foundations of Physics 33 (10):1495-1541.
    Wavefunction collapse models modify Schrödinger's equation so that it describes the rapid evolution of a superposition of macroscopically distinguishable states to one of them. This provides a phenomenological basis for a physical resolution to the so-called “measurement problem.” Such models have experimentally testable differences from standard quantum theory. The most well developed such model at present is the Continuous Spontaneous Localization (CSL) model in which a universal fluctuating classical field interacts with particles to cause collapse. One “side effect” of (...)
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  11.  64
    Quantum graphic dynamics.Stanley P. Gudder - 1988 - Foundations of Physics 18 (7):751-776.
    A discrete quantum mechanics is developed and used to construct models for discrete space-time and for the internal dynamics of elementary particles. This dynamics is given in terms of particles performing a quantum random walk on a multigraph.
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  12.  22
    Quantum Field Theory of Black-Swan Events.H. Kleinert - 2014 - Foundations of Physics 44 (5):546-556.
    Free and weakly interacting particles are described by a second-quantized nonlinear Schrödinger equation, or relativistic versions of it. They describe Gaussian random walks with collisions. By contrast, the fields of strongly interacting particles are governed by effective actions, whose extremum yields fractional field equations. Their particle orbits perform universal Lévy walks with heavy tails, in which rare events are much more frequent than in Gaussian random walks. Such rare events are observed in exceptionally strong windgusts, monster or rogue waves, earthquakes, (...)
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  13. Conceptual Problems of Quantum Gravity.Abhay Ashtekar & John Stachel (eds.) - 1991 - Birkhauser.
    Introduction: The Winding Road to Quantum Gravity Abhay Ashtekar Traveler, there are no paths; Paths are made by walking. ...
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  14.  12
    Building Spacetime from Effective Interactions Between Quantum Fluctuations.Anna Karlsson - 2023 - Foundations of Physics 53 (2):1-32.
    We describe how a model of effective interactions between quantum fluctuations under certain assumptions can be constructed in a way so that the large-scale limit gives an effective theory that matches general relativity (GR) in vacuum regions. This is an investigation of a possible scenario of spacetime emergence from quantum interactions directly in the spacetime, and of how effective quantum behaviour might provide a useful link between detailed properties of quantum interactions and GR. The quantum (...)
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  15.  70
    Misleading Signposts Along the de Broglie-Bohm Road to Quantum Mechanics.Michael K.-H. Kiessling - 2010 - Foundations of Physics 40 (4):418-429.
    Eighty years after de Broglie’s, and a little more than half a century after Bohm’s seminal papers, the de Broglie–Bohm theory (a.k.a. Bohmian mechanics), which is presumably the simplest theory which explains the orthodox quantum mechanics formalism, has reached an exemplary state of conceptual clarity and mathematical integrity. No other theory of quantum mechanics comes even close. Yet anyone curious enough to walk this road to quantum mechanics is soon being confused by many misleading signposts that (...)
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  16. Transgressing the boundaries: Towards a transformative hermeneutics of quantum gravity.Alan Sokal - manuscript
    Biographical Information: The author is a Professor of Physics at New York University. He has lectured widely in Europe and Latin America, including at the Università di Roma ``La Sapienza'' and, during the Sandinista government, at the Universidad Nacional Autónoma de Nicaragua. He is co-author with Roberto Fernández and Jürg Fröhlich of Random Walks, Critical Phenomena, and Triviality in Quantum Field Theory (Springer, 1992).
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  17.  36
    A Local-Realistic Model of Quantum Mechanics Based on a Discrete Spacetime.Antonio Sciarretta - 2018 - Foundations of Physics 48 (1):60-91.
    This paper presents a realistic, stochastic, and local model that reproduces nonrelativistic quantum mechanics results without using its mathematical formulation. The proposed model only uses integer-valued quantities and operations on probabilities, in particular assuming a discrete spacetime under the form of a Euclidean lattice. Individual particle trajectories are described as random walks. Transition probabilities are simple functions of a few quantities that are either randomly associated to the particles during their preparation, or stored in the lattice nodes they visit (...)
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  18.  12
    A Little Bit of Classical Magic to Achieve (Super-)Quantum Speedup.Paweł Kurzyński & Dagomir Kaszlikowski - 2021 - Foundations of Physics 51 (3):1-14.
    We introduce nebit, a classical bit with a signed probability distribution. We study its properties and basic transformations that can be applied to it. Then, we introduce a simple dynamical model – a classical random walk supplemented with nebits. We show that such a model exhibits some counterintuitive non-classical properties and that it can achieve or even exceed the speedup of Grover’s quantum search algorithm. The proposed classical dynamics never reveals negativity of nebits and thus we do not (...)
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  19.  49
    God does play dice with the universe: a startling new picture of the world Einstein could not believe but you can understand.Shan Gao - 2008 - Bury St. Edmunds, Suffolk: Arima.
    Science has made a mighty advance since it originated in ancient Greece more than 2500 years ago. Yet we still live in Plato's cave today; we think everything around us moves continuously, but continuous motion is merely a shadow of real motion. This book will lead you to walk out the cave along a logical and comprehensible road. After passing Zeno's arrow, Newton's inertia, Einstein's light, and Schrodinger's cat, you will reach the real world, where every thing in the (...)
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  20.  16
    Schrödinger’s Equation as a Consequence of the Central Limit Theorem Without Assuming Prior Physical Laws.P. M. Grinwald - 2022 - Foundations of Physics 52 (2):1-22.
    The central limit theorem has been found to apply to random vectors in complex Hilbert space. This amounts to sufficient reason to study the complex–valued Gaussian, looking for relevance to quantum mechanics. Here we show that the Gaussian, with all terms fully complex, acting as a propagator, leads to Schrödinger’s non-relativistic equation including scalar and vector potentials, assuming only that the norm is conserved. No physical laws need to be postulated a priori. It thereby presents as a process of (...)
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  21. A Conservative Solution to the Stochastic Dynamical Reduction Problem: Case of Spin-z Measurement of a Spin-1/2 Particle.T. Halabi - 2013 - Foundations of Physics 43 (10):1252-1256.
    Stochastic dynamical reduction for the case of spin-z measurement of a spin-1/2 particle describes a random walk on the spin-z axis. The measurement’s result depends on which of the two points: spin-z=±ħ/2 is reached first. Born’s rule is recovered as long as the expected step size in spin-z is independent of proximity to endpoints. Here, we address the questions raised by this description: (1) When is collapse triggered, and what triggers it? (2) Why is the expected step size in (...)
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  22.  15
    Classical variational derivation and physical interpretation of Dirac's equation.B. H. Lavenda - 1987 - Foundations of Physics 17 (3):221-237.
    A simple random walk model has been shown by Gaveauet al. to give rise to the Klein-Gordon equation under analytic continuation. This absolutely most probable path implies that the components of the Dirac wave function have a common phase; the influence of spin on the motion is neglected. There is a nonclassical path of relative maximum likelihood which satisfies the constraint that the probability density coincide with the quantum mechanical definition. In three space dimensions, and in the presence (...)
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  23.  36
    Fundamental Pattern and Consciousness.Jerry Gin - 2016 - Cosmos and History 12 (2):99-113.
    In the new physics and in the new field of cosmometry, 1 it is the fundamental pattern that results in the motion from which all is created. Everything starts with the point of infinite potential. The tetrahedron at the point gives birth to the cuboctahedron ; its motion and structure result in the creation of the torus structure. The torus structure is self-referencing on a moment by moment basis since all must pass through the center. But isn't self-referencing the basis (...)
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  24.  14
    Lectures on consciousness and interpretation.Jitendra Nath Mohanty - 2009 - New Delhi: Oxford University Press. Edited by Tara Chatterjea.
    J.N. Mohanty is one of the most distinguished philosophers India has produced in recent years. Written mostly in the 21st century, this collection deals with the nature of consciousness and its interpretation. Starting from the concept of consciousness as an event in time, he investigates the notion of consciousness as a social phenomenon. The temporality and historicity of consciousness are also emphasized. He examines experiences from various walks of life, from religion to quantum physics, from interpretation of perception to (...)
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  25. Probabilities in deBroglie-Bohm Theory: Towards a Stochastic Alternative (Version 0.1 beta).Patrick Dürr & Alexander Ehmann - manuscript
    We critically examine the role and status probabilities, as they enter via the Quantum Equilibrium Hypothesis, play in the standard, deterministic interpretation of deBroglie’s and Bohm’s Pilot Wave Theory (dBBT), by considering interpretations of probabilities in terms of ignorance, typicality and Humean Best Systems, respectively. We argue that there is an inherent conflict between dBBT and probabilities, thus construed. The conflict originates in dBBT’s deterministic nature, rooted in the Guidance Equation. Inquiring into the latter’s role within dBBT, we find (...)
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  26.  68
    Why the Weyl Tile Argument is Wrong.Lu Chen - forthcoming - British Journal for the Philosophy of Science.
    Weyl famously argued that if space were discrete, then Euclidean geometry could not hold even approximately. Since then, many philosophers have responded to this argument by advancing alternative accounts of discrete geometry that recover approximately Euclidean space. However, they have missed an importantly flawed assumption in Weyl’s argument: physical geometry is determined by fundamental spacetime structures independently from dynamical laws. In this paper, I aim to show its falsity through two rigorous examples: random walks in statistical physics and quantum (...)
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  27. 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 (...)
     
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  28.  89
    “Hier bin ich Mensch, hier darf ich’s sein!”—Partaking in the Nanoworld.Astrid Schwarz & Alfred Nordmann - 2011 - NanoEthics 5 (2):233-243.
    Images from the nanoworld are not at all disorienting or bewildering, as one might expect from contemplating the strange and surprising features that arise where classical physics comes to an end and quantum effects begin to appear. Instead, we see the traces of explorers in a world that appears to be infinitely malleable. The paper shows that the capability to visualize processes and phenomena at the nanoscale is a matter not only of research technologies and the advancement of observational (...)
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  29. Department of physics.Alan D. Sokal - unknown
    The author is a Professor of Physics at New York University. In the summers of 1986{88 he taught mathematics at the Universidad Nacional Autonoma de Nicaragua. He is co-author with Roberto Fernandez and Jurg Frohlich of Random Walks, Critical Phenomena, and Triviality in Quantum Field Theory (Springer, 1992), and co-author with Jean Bricmont of the forthcoming Les impostures scientiques des philosophes (post-)modernes.
     
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  30. Belief: An Essay.Jamie Iredell - 2011 - Continent 1 (4):279-285.
    continent. 1.4 (2011): 279—285. Concerning its Transitive Nature, the Conversion of Native Americans of Spanish Colonial California, Indoctrinated Catholicism, & the Creation There’s no direct archaeological evidence that Jesus ever existed. 1 I memorized the Act of Contrition. I don’t remember it now, except the beginning: Forgive me Father for I have sinned . . . This was in preparation for the Sacrament of Holy Reconciliation, where in a confessional I confessed my sins to Father Scott, who looked like Jesus, (...)
     
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  31.  10
    The illusion of life and death: mind, consciousness, and eternal being.Clare Goldsberry - 2021 - Rhinebeck, New York: Monkfish Book Publishing Company.
    This metaphysical and personal exploration of the nature of life provides a rare guide to living and dying fearlessly and with grace. Using the wisdom obtained over a lifetime of spiritual seeking, study, and practice, along with insights gained from the death of her significant other, Clare Goldsberry explores the fundamental nature of life and death, as well as their meaning and purpose. Sharing the wisdom and knowledge of the ancient sages, spiritual teachers like the Buddha, philosophers like Plato and (...)
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  32.  38
    Spacetime code: Preliminaries and motivations. [REVIEW]Gin McCollum - 1978 - Foundations of Physics 8 (3-4):211-228.
    A review of the work of David Finkelstein and others on quantum topology is given, the intention being to present physical ideas and a progress report, which will help readers with the more detailed papers. Some new approaches involving walks on graphs are presented.
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  33.  26
    Cross-Domain Statistical–Sequential Dependencies Are Difficult to Learn.Anne M. Walk & Christopher M. Conway - 2016 - Frontiers in Psychology 7.
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  34.  19
    Emotion and dance in dynamic light displays.Richard D. Walk & Carolyn P. Homan - 1984 - Bulletin of the Psychonomic Society 22 (5):437-440.
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  35.  50
    The creation, discovery, view: Towards a possible explanation of quantum reality.Towards A. Possible Explanation Of Quantum - 1999 - In Maria Luisa Dalla Chiara (ed.), Language, Quantum, Music. Springer. pp. 105.
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  36.  15
    Effect of visual pattern on running an unpredictable maze.Richard D. Walk & Clarence P. Walters - 1981 - Bulletin of the Psychonomic Society 18 (3):113-114.
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  37.  12
    Exploratory research with an adult visual cliff.Richard D. Walk & David R. Miller - 1980 - Bulletin of the Psychonomic Society 16 (5):388-390.
  38. Perception of the smile and other emotions of the body and face at different distances.R. D. Walk & K. L. Walters - 1988 - Bulletin of the Psychonomic Society 26 (6):510-510.
     
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  39.  16
    Birdsong learning and intersensory processing.Richard D. Walk & Michael L. Schwartz - 1982 - Bulletin of the Psychonomic Society 19 (2):101-104.
  40.  19
    Ecological depth perception: Ducklings tested together and alone.Richard D. Walk & Kathy Walters - 1984 - Bulletin of the Psychonomic Society 22 (4):368-371.
    Ducklings were placed either singly or in pairs on a platform at two different heights. Both height and pairing influenced performance: More ducklings descended from the platform at low heights, and more single ducklings descended than paired ducklings. The social factor, pairing, made behavior more cautious and decreased the number of distress calls. A similar trend for pairing to influence performance was shown on the visual cliff. Without its peers, the duckling is a distressed animal. Previous careless behavior by ducklings (...)
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  41.  15
    Lattice embeddings and array noncomputable degrees.Stephen M. Walk - 2004 - Mathematical Logic Quarterly 50 (3):219.
    We focus on a particular class of computably enumerable degrees, the array noncomputable degrees defined by Downey, Jockusch, and Stob, to answer questions related to lattice embeddings and definability in the partial ordering of c. e. degrees under Turing reducibility. We demonstrate that the latticeM5 cannot be embedded into the c. e. degrees below every array noncomputable degree, or even below every nonlow array noncomputable degree. As Downey and Shore have proved that M5 can be embedded below every nonlow2 degree, (...)
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  42.  18
    Sex differences in motion perception of Adler’s six great ideas and their opposites.Richard D. Walk & Jacqueline M. F. Samuel - 1988 - Bulletin of the Psychonomic Society 26 (3):232-235.
    A mime presented on videotape Adler’s six great ideas of truth, goodness, beauty, liberty, equality, and justice; their opposites; and the transitions from the positive or “good” concepts to their opposites. Using Johansson’s (1973) technique, the performer’s 12 joints were marked with points of light. Overall, the viewers had marginal success in identifying the concepts, but females were much more successful than males in identifying the “bad” ones of evil, slavery, falsehood, and ugliness, averaging 62% correct to the males’ 23%. (...)
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  43.  22
    Attention and the depth perception of kittens.Richard D. Walk, Jane D. Shepherd & David R. Miller - 1988 - Bulletin of the Psychonomic Society 26 (3):248-251.
  44.  5
    Curriculum Materials.Walking Ten Feet Tall - 2002 - Journal of Moral Education 31 (4):487-488.
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  45.  26
    Attentional factors in depth perception.Richard D. Walk - 1979 - Behavioral and Brain Sciences 2 (1):83-84.
  46.  27
    Differential Effects of Carbohydrates on Behavioral and Neuroelectric Indices of Selective Attention in Preadolescent Children.Anne M. Walk, Lauren B. Raine, Arthur F. Kramer, Neal J. Cohen, Naiman A. Khan & Charles H. Hillman - 2017 - Frontiers in Human Neuroscience 11.
  47.  13
    Effect of discrimination reversal on human discrimination learning.Richard D. Walk - 1952 - Journal of Experimental Psychology 44 (6):410.
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  48.  55
    Maximal contiguous degrees.Peter Cholak, Rod Downey & Stephen Walk - 2002 - Journal of Symbolic Logic 67 (1):409-437.
    A computably enumerable (c.e.) degree is a maximal contiguous degree if it is contiguous and no c.e. degree strictly above it is contiguous. We show that there are infinitely many maximal contiguous degrees. Since the contiguous degrees are definable, the class of maximal contiguous degrees provides the first example of a definable infinite anti-chain in the c.e. degrees. In addition, we show that the class of maximal contiguous degrees forms an automorphism base for the c.e. degrees and therefore for the (...)
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  49.  24
    Perception of emotion from moving body cues in photographs.Kathy L. Walters & Richard D. Walk - 1988 - Bulletin of the Psychonomic Society 26 (2):112-114.
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  50. Perception of emotion from body posture.K. L. Walters & R. D. Walk - 1986 - Bulletin of the Psychonomic Society 24 (5):329-329.
     
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