Results for 'W. Roberts Bryan'

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  1.  29
    Falernian Grapes (VVvac Falernae). An Inaugural Address on Horace by Professor R. S. Conway, with Six Short Papers by Members of the Leeds Branch of the Classical Association. Edited with a Postscript by W. Rhys Roberts. Cambridge University Press, 1917. [REVIEW]H. D. R. W. - 1917 - The Classical Review 31 (01):30-31.
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  2.  4
    The Simple Failure of Curie’s Principle: How to Get Out What Hasn’T Gone In.Bryan W. Roberts - unknown
    It’s often been thought that Curie’s principle says something that’s just obviously true about the world. However, Bryan Roberts has discovered a simple way in which Curie’s principle fails.
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  3.  4
    Weak Interactions and the Curious Little Arrow of Time.Bryan W. Roberts - unknown
    In this talk from ETH Zurich’s Workshop on Time in Physics, Bryan Roberts introduces weak interactions and argues that the laws of nature are directed in time.
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  4. Group Structural Realism.Bryan W. Roberts - 2011 - British Journal for the Philosophy of Science 62 (1):47-69.
    We present a precise form of structural realism, called group structural realism , which identifies ‘structure’ in quantum theory with symmetry groups. However, working out the details of this view actually illuminates a major problem for structural realism; namely, a structure can itself have structure. This article argues that, once a precise characterization of structure is given, the ‘metaphysical hierarchy’ on which group structural realism rests is overly extravagant and ultimately unmotivated.
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  5. Comment on Ashtekar: Generalization of Wigner׳s Principle.Bryan W. Roberts - 2015 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 52 (Part A):21-23.
    Ashtekar has illustrated that two of the available roads to testing for time asymmetry can be generalized beyond the structure of quantum theory, to much more general formulations of mechanics. The purpose of this note is to show that a third road to T-violation, which I have called "Wigner's Principle," can be generalized in this way as well.
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  6. A General Perspective On Time Observables.Bryan W. Roberts - 2014 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 47:50-54.
    I propose a general geometric framework in which to discuss the existence of time observables. This framework allows one to describe a local sense in which time observables always exist, and a global sense in which they can sometimes exist subject to a restriction on the vector fields that they generate. Pauli׳s prohibition on quantum time observables is derived as a corollary to this result. I will then discuss how time observables can be regained in modest extensions of quantum theory (...)
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  7.  10
    Time Reversal.Bryan W. Roberts - forthcoming - In Eleanor Knox & Alistair Wilson (eds.), The Routledge Companion to the Philosophy of Physics.
    This article deals with the question of what time reversal means. It begins with a presentation of the standard account of time reversal, with plenty of examples, followed by a popular non-standard account. I argue that, in spite of recent commentary to the contrary, the standard approach to the meaning of time reversal is the only one that is philosophically and physically viable. The article concludes with a few open research problems about time reversal.
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  8.  93
    The Simple Failure of Curie’s Principle.Bryan W. Roberts - 2013 - Philosophy of Science 80 (4):579-592.
    I point out a simple sense in which the standard formulation of Curie’s principle is false when the symmetry transformation it describes is time reversal.
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  9.  88
    How Galileo Dropped the Ball and Fermat Picked It Up.Bryan W. Roberts - 2011 - Synthese 180 (3):337-356.
    This paper introduces a little-known episode in the history of physics, in which a mathematical proof by Pierre Fermat vindicated Galileo’s characterization of freefall. The first part of the paper reviews the historical context leading up to Fermat’s proof. The second part illustrates how a physical and a mathematical insight enabled Fermat’s result, and that a simple modification would satisfy any of Fermat’s critics. The result is an illustration of how a purely theoretical argument can settle an apparently empirical debate.
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  10.  40
    Three Merry Roads to T-Violation.Bryan W. Roberts - 2015 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 52 (Part A):8-15.
    This paper is a tour of how the laws of nature can distinguish between the past and the future, or be T-violating. I argue that, in terms of the basic argumentative structure, there are basically just three approaches currently being explored. The first is an application of Curie's Principle, together with the CPT theorem. The second route makes use of a principle due to Pasha Kabir which allows for a direct detection. The third route makes use of a Non-degeneracy Principle, (...)
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  11.  21
    Unreal Observables.Bryan W. Roberts - 2017 - Philosophy of Science 84 (5):1265-1274.
    This note argues that quantum observables can include not just self-adjoint operators, but any member of the class of normal operators, including those with non-real eigenvalues. Concrete experiments, statistics, and symmetries are all expressed in this more general context. However, this more general class of observables also introduces a new restriction on which sets of operators can be interpreted as observables at once. These sets are referred to here as 'sharp sets.
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  12.  41
    Time, Symmetry and Structure: A Study in the Foundations of Quantum Theory.Bryan W. Roberts - 2012 - Pittsburgh D-Scholarship Dissertation.
    This dissertation is about the sense in which the laws of quantum theory distinguish between the past and the future. I begin with an account of what it means for quantum theory to make such a distinction, by providing a novel derivation of the meaning of "time reversal." I then show that if Galilei invariant quantum theory does distinguish a preferred direction in time, then this has consequences for the ontology of the theory. In particular, it requires matter to admit (...)
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  13.  51
    Kramers Degeneracy Without Eigenvectors.Bryan W. Roberts - 2012 - Physical Review A 86 (3):034103.
    Wigner gave a well-known proof of Kramers degeneracy, for time reversal invariant systems containing an odd number of half-integer spin particles. But Wigner's proof relies on the assumption that the Hamiltonian has an eigenvector, and thus does not apply to many quantum systems of physical interest. This note illustrates an algebraic way to talk about Kramers degeneracy that does not appeal to eigenvectors, and provides a derivation of Kramers degeneracy in this more general context.
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  14.  54
    Three Myths About Time Reversal in Quantum Theory.Bryan W. Roberts - 2017 - Philosophy of Science 84 (2):315-334.
    Many have suggested that the transformation standardly referred to as `time reversal' in quantum theory is not deserving of the name. I argue on the contrary that the standard definition is perfectly appropriate, and is indeed forced by basic considerations about the nature of time in the quantum formalism.
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  15.  3
    Rovelli on Disharmony Between the Quantum Arrows of Time.Bryan W. Roberts - unknown
    Rovelli argues that the there is disharmony with respect to the arrow of time from the perspective of testable predictions, as compared to the perspective of Schroedinger evolution, and uses this claim as evidence against realist interpretations of the wave function. I argue on the contrary that this disharmony arises only out of a non-standard definition of time reversal that ignores the 'big-T', and that harmony is restored when the standard definition is adopted.
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  16.  69
    Galileo's Refutation of the Speed-Distance Law of Fall Rehabilitated.John D. Norton & Bryan W. Roberts - 2010 - Centaurus 54 (2):148-164.
    Galileo's refutation of the speed-distance law of fall in his Two New Sciences is routinely dismissed as a moment of confused argumentation. We urge that Galileo's argument correctly identified why the speed-distance law is untenable, failing only in its very last step. Using an ingenious combination of scaling and self-similarity arguments, Galileo found correctly that bodies, falling from rest according to this law, fall all distances in equal times. What he failed to recognize in the last step is that this (...)
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  17.  5
    Observables, Disassembled.Bryan W. Roberts - 2018 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 63:150-162.
    How should we characterise the observable aspects of quantum theory? This paper argues that philosophers and physicists should jettison a standard dogma: that observables must be represented by self-adjoint or Hermitian operators. Four classes of non-standard observables are identified: normal operators, symmetric operators, real-spectrum operators, and none of these. The philosophical and physical implications of each are explored.
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  18.  33
    Disregarding the 'Hole Argument'.Bryan W. Roberts - unknown
    Jim Weatherall has suggested that Einstein's hole argument, as presented by Earman and Norton, is based on a misleading use of mathematics. I argue on the contrary that Weatherall demands an implausible restriction on how mathematics is used. The hole argument, on the other hand, is in no new danger at all.
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  19.  28
    Curie's Hazard: From Electromagnetism to Symmetry Violation.Bryan W. Roberts - unknown
    We explore the facts and fiction regarding Curie's own example of Curie's principle. Curie's claim is vindicated in his suggested example of the electrostatics of central fields, but fails in many others. Nevertheless, the failure of Curie's claim is still of special empirical interest, in that it can be seen to underpin the experimental discovery of parity violation and of CP violation in the 20th century.
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  20.  20
    Does Quantum Time Have a Preferred Direction?Bryan W. Roberts - unknown
    This paper states and proves a precise sense in which, if all the measurable properties of an ordinary quantum mechanical system are ultimately derivable from position, then time in quantum mechanics can have no preferred direction. In particular, I show that when the position observable forms a complete set of commuting observables, Galilei invariant quantum mechanics is guaranteed to be time reversal invariant.
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  21.  12
    When We Do Have a Classical Arrow of Time.Bryan W. Roberts - 2013 - Philosophy of Science 80 (5):1112-1124.
    I point out that some common folk wisdom about time reversal invariance in classical mechanics is strictly incorrect, by showing some explicit examples in which classical time reversal invariance fails, even among conservative systems. I then show that there is nevertheless a broad class of familiar classical systems that are time reversal invariant.
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  22.  25
    The Language of Aristophanic Parody The Language of Parody: A Study in the Diction of Aristophanes. By E. W. Hope. Baltimore: J. H. Furst Company, 1906. Pp. 62. [REVIEW]W. Rhys Roberts - 1908 - The Classical Review 22 (06):192-.
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  23.  17
    Roberts' Demetrius de Elocutione Roberts' Demetrius de Elocutione.W. Rhys Roberts - 1903 - The Classical Review 17 (02):128-134.
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  24.  16
    Livingstone's Defence of Classical Education A Defence of Classical Education. By R. W. Livingstone. Crown 8vo. Pp. Xi + 278. London: Macmillan. 4s. 6d. Net. [REVIEW]W. Rhys Roberts - 1917 - The Classical Review 31 (08):196-199.
  25. Health Care on Main Street-Laura Weiss Roberts, John Battaglia, Margaret Smithpeter, and Richard S. Epstein Reply.L. W. Roberts, J. Battaglia, M. Smithpeter & R. S. Epstein - 2000 - Hastings Center Report 30 (3):5-6.
     
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  26. "Jones," W. H. S., Pausanias, Translated, II.W. Rhys Roberts - 1927 - Classical World: A Quarterly Journal on Antiquity 21:11-15.
  27.  33
    Corporate Political Strategy: An Examination of the Relation Between Political Expenditures, Environmental Performance, and Environmental Disclosure.Charles H. Cho, Dennis M. Patten & Robin W. Roberts - 2006 - Journal of Business Ethics 67 (2):139-154.
    Two fundamental business ethics issues that repeatedly surface in the academic literature relate to business's role in the development of public policy [Suarez, S. L.: 2000, Does Business Learn? (The University of Michigan Press, Ann Arbor, MI); Roberts, R. W. and D. D. Bobek: 2004, Accounting, Organizations and Society 29(5-6), 565-590] and its role in responsibly managing the natural environment [Newton, L.: 2005, Business Ethics and the Natural Environment (Blackwell Publishing, Oxford)]. When studied together, researchers often examine if, and (...)
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  28. Reviews : Peter Uwe Hohendahl, Reappraisals: Shifting Alignments in Postwar Critical Theory (Cornell University Press, 1991); Theodor W. Adorno, Notes to Literature: Volume One, Ed. Rolf Tiedermann, Trans. Shierry Weber Nicholsen (Columbia University Press, 1991). [REVIEW]David Roberts - 1994 - Thesis Eleven 38 (1):187-190.
    Reviews : Peter Uwe Hohendahl, Reappraisals: Shifting Alignments in Postwar Critical Theory ; Theodor W. Adorno, Notes to Literature: Volume One, ed. Rolf Tiedermann, trans. Shierry Weber Nicholsen.
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  29. Ademollo, Francesco. The Cratylus of Plato: A Commentary. Cambridge: Cam-Bridge University Press, 2011. Xx+ 538 Pp. 1 Black-and-White Fig. Cloth, $140. Adler, Eric. Valorizing the Barbarians: Enemy Speeches in Roman Historiography. Austin: University of Texas Press, 2011. Xiii+ 269 Pp. Cloth, $55. Africa, Thomas W. A Historian's Palette: Studies in Greek and Roman History. [REVIEW]Lauren J. Apfel, Amalia Avramidou, Anne Balansard, Gilles Dorival, Mireille Loubet, Lee L. Brice, Jennifer T. Roberts, Peter Burian & Alan Shapiro - 2011 - American Journal of Philology 132:683-690.
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  30.  45
    Art as Icon; An Interpretation of C. W. Morris.Louise Nisbet Roberts - 1955 - Tulane Studies in Philosophy 4:75-82.
  31.  24
    Theodor W. Adorno, Critical Models: Interventions and Catchwords.D. Roberts - 1999 - Thesis Eleven 59 (3-4):114-114.
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  32.  15
    Larfeld on Greek Epigraphy Griechische Epigraphik, by W. Larfeld (Pp. 357—429 of the 2nd Edition of I. Mueller's Handbuch der Klassischen Alterthuemer). [REVIEW]E. S. Roberts - 1893 - The Classical Review 7 (09):412-415.
  33.  6
    In Situstudy of Self-Ion Irradiation Damage in W and W–5Re at 500 °C.X. Yi, M. L. Jenkins, M. Briceno, S. G. Roberts, Z. Zhou & M. A. Kirk - 2013 - Philosophical Magazine 93 (14):1715-1738.
  34.  18
    The Presocratics (P.) Curd, (D.W.) Graham (Edd.) The Oxford Handbook of Presocratic Philosophy. Pp. Xii + 588. New York: Oxford University Press, 2008. Cased, £85. ISBN: 978-0-19-514687-. [REVIEW]Jenny Bryan - 2010 - The Classical Review 60 (2):366-368.
  35.  5
    Our Future Inheritance: Choice or Chance? By A. Jones W. F. Bodmer Pp. Xi + 141 (Oxford University Press, 1974.) Price £4.00. [REVIEW]D. F. Roberts - 1975 - Journal of Biosocial Science 7 (4):494-496.
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  36.  2
    Art as Icon; An Interpretation of C. W. Morris.Louise Nisbet Roberts - 1955 - Tulane Studies in Philosophy 4:75-82.
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  37.  2
    Mirror of Medicine—a History of the BMJ 1840–1990. By P. W. J. Bartrip. Pp. 338. (Oxford University Press, London, 1990.). [REVIEW]V. A. B. Roberts - 1991 - Journal of Biosocial Science 23 (3):379-380.
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  38.  1
    B. F. Skinner: A LifeDaniel W. Bjork.Jon H. Roberts - 1994 - Isis 85 (4):733-734.
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  39.  1
    W. Patrick McCray, The Visioneers: How a Group of Elite Scientists Pursued Space Colonies, Nanotechnologies, and a Limitless Future. Princeton and Oxford: Princeton University Press, 2013. Pp. Xii+351. ISBN 978-0-691-13983-8. £19.95. [REVIEW]Peder Roberts - 2014 - British Journal for the History of Science 47 (3):580-581.
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  40. The Portraiture of a Christian Gentleman, by a Barrister [Signed W.R.].William Roberts - 1829
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  41. W. Taylor Stevenson. History as Myth: The Import for Contemporary Theology Pp. 178, The Seabury Press, New York, 1969. $6.95. [REVIEW]T. A. Roberts - 1970 - Religious Studies 6 (1):101.
  42.  13
    Intellectual Virtues: An Essay in Regulative Epistemology.R. Roberts & W. Wood - 2009 - Analysis 69 (1):181-182.
    Since the publication of Edmund Gettier's challenge to the traditional epistemological doctrine of knowledge as justified true belief, Roberts and Wood claim that epistemologists lapsed into despondency and are currently open to novel approaches. One such approach is virtue epistemology, which can be divided into virtues as proper functions or epistemic character traits. The authors propose a notion of regulative epistemology, as opposed to a strict analytic epistemology, based on intellectual virtues that function not as rules or even as (...)
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  43.  3
    Freedom as Marronage.Neil Roberts - 2015 - University of Chicago Press.
    What is the opposite of freedom? In _Freedom as Marronage_, Neil Roberts answers this question with definitive force: slavery, and from there he unveils powerful new insights on the human condition as it has been understood between these poles. Crucial to his investigation is the concept of marronage—a form of slave escape that was an important aspect of Caribbean and Latin American slave systems. Examining this overlooked phenomenon—one of action from slavery and toward freedom—he deepens our understanding of freedom (...)
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  44.  3
    A Psychometric Analysis of the Reading the Mind in the Eyes Test: Toward a Brief Form for Research and Applied Settings.Sally Olderbak, Oliver Wilhelm, Gabriel Olaru, Mattis Geiger, Meghan W. Brenneman & Richard D. Roberts - 2015 - Frontiers in Psychology 6.
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  45.  4
    Testing the Cognitive Catalyst Model of Depression: Does Rumination Amplify the Impact of Cognitive Diatheses in Response to Stress?Jeffrey A. Ciesla, Julia W. Felton & John E. Roberts - 2011 - Cognition and Emotion 25 (8):1349-1357.
  46. Writings of Charles S. Peirce: A Chronological Edition Vol. 2.Charles S. Peirce, Edward C. Moore, Max H. Fisch, Christian J. W. Kloesel, Don D. Roberts & Lynn A. Ziegler - 1985 - Transactions of the Charles S. Peirce Society 21 (2):271-276.
     
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  47.  2
    How Long Does the Modality Effect Persist?Randall W. Engle & James S. Roberts - 1982 - Bulletin of the Psychonomic Society 19 (6):343-346.
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  48.  6
    De Caelo; De Generatione Et CorruptioneMeteorologicaRhetorica; De Rhetorica Ad Alexandrum; De Poetica.J. L. Stocks, H. H. Joachim, E. W. Webster, W. Rhys Roberts, E. S. Forster & Ingram Bywater - 1925 - Journal of Hellenic Studies 45:266.
  49. Discourse, Resistance and Identity Formation.J. Satterthwaite, W. Martin & L. Roberts (eds.) - 2006 - Trentham Books Limited.
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  50.  67
    Corporate Charitable Contributions: A Corporate Social Performance or Legitimacy Strategy?Jennifer C. Chen, Dennis M. Patten & Robin W. Roberts - 2008 - Journal of Business Ethics 82 (1):131-144.
    This study examines the relation between firms' corporate philanthropic giving and their performance in three other social domains - employee relations, environmental issues, and product safety. Based on a sample of 384 U.S. companies and using data pooled from 1998 through 2000, we find that worse performers in the other social areas are both more likely to make charitable contributions and that the extent of their giving is larger than for better performers. Analyses of each separate area of social performance, (...)
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