In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Chances and Choices: Exploring the Impact of Music Education by Stephanie PittsLeonard TanStephanie Pitts, Chances and Choices: Exploring the Impact of Music Education (Oxford: Oxford University Press, 2012)In Chances and Choices: Exploring the Impact of Music Education, Stephanie Pitts investigates the lifelong effects of music education by examining the place of music in the lives of more than a hundred adults. Cast in seven (...) chapters, this qualitative study includes six pairs of interludes inserted between the chapters as well as a concluding postlude. Following a brief summary of the book, I will offer my critical response.In Chapter One, Pitts lists the six primary aims of the study: to examine the impact of musical learning during childhood on lifelong engagement with music; to assess the role that school music plays in lifelong involvement in music and attitudes to music; to investigate the influence of various locations for learning; to discuss particular strengths of music education; to probe into the problems of music education systems; and to proffer ways in which knowing more about the long-term implications of music education can help inform practice. She then presents the life history methodology she employs to accomplish these aims, detailing how she gathers retrospective accounts of formative musical experiences by British classical musicians, supplemented by accounts from British popular musicians and Italian respondents. These accounts constitute the data that are [End Page 102] analyzed from different perspectives later in the book. A brief survey of international approaches to music education and outline of the chapters to follow conclude the chapter.In Chapter Two, Pitts sketches a brief overview of twentieth century British music education before analyzing trends in the formative musical experience of British respondents from the 1930s to the 1990s. In an attempt to determine generational trends, Pitts groups the written responses according to six categories of musical influences: classroom music, music outside the classroom, teacher attitudes, music in the home, parent attitudes, and lifelong involvement. For each decade, Pitts presents a rank ordering of the six musical influences, revealing the increasing importance of music outside the classroom through the decades. Pitts then examines the various locations where musical learning takes place, such as the school, the home, and the church, in Chapter Three. Here, she surveys the characteristics of supportive musical environments, examines extracurricular music making, and discusses self-learning in music. Pitts concludes the chapter by analyzing findings from the Italian participants, drawing attention to the fact that in its emphasis on specialist training, the Italian music education system differs from the generalist approaches of its British counterpart.Pithily titled “Inspiring, Affirming, Challenging,” Chapter Four explores the characteristics of memorable and significant music teachers and role models. Among the many themes considered, Pitts notes that inspiring teachers are those who provide constant support to their students and possess advanced musical skills; teachers who were recollected negatively, on the other hand, were associated with being negligent, incompetent, dismissive, or fearsome. In addition, Pitts also explores the role of parents, siblings, extended family, and friends as musical mentors, role models, and sources of musical learning. With these foundations for musical learning established, Pitts analyzes the life history accounts of the respondents by musical outcome in Chapter Five. She discusses how adults make music in community settings, educational settings, worship settings, self-directed groups, and private homes, and describes how adults learn music and attend concerts as a form of lifelong musical involvement. From the data, Pitts surmises that even after leaving school, the participants often desire to improve musically; they frequently concentrate their efforts not only on participating in musical activities, but also on developing their musical skills further.In Chapter Six, “Rhetoric and Reality,” Pitts assesses the degree to which the participants’ experiences corroborate contemporary claims for the value and effects of musical learning. Drawing on the rich data of life history accounts, Pitts concludes that there is “compelling evidence for the lifelong impact of musical education” (p. 173), further arguing that the musical skills, attitudes, and values acquired during school years do have a long-term influence on musical engagement [End Page 103] in later years. Chapter Seven, aptly titled “Chances, Choices, and Conclusion... (shrink)

Taking its direction from references to Black and Indigenous struggles present in Leonard Harris’ oeuvre, this chapter turns to politicized acts of resistance among Black and Indigenous communities. More specifically, the essay traces the functions of cultural pluralism, value relativism, and representative heuristics within solidarity work that enact logics of resistance to settler colonization and anti-Black racism, among other forms of oppression. Through this analysis, we see that Harris’ views about insurrection and normativity entail that both oppression and resistance are (...) the result of multiplicitous forms of agency. (shrink)

A dramatic shift in British and French ideas about empire unfolded in the sixty years straddling the turn of the nineteenth century. As Jennifer Pitts shows in A Turn to Empire, Adam Smith, Edmund Burke, and Jeremy Bentham were among many at the start of this period to criticize European empires as unjust as well as politically and economically disastrous for the conquering nations. By the mid-nineteenth century, however, the most prominent British and French liberal thinkers, including John Stuart (...) Mill and Alexis de Tocqueville, vigorously supported the conquest of non-European peoples. Pitts explains that this reflected a rise in civilizational self-confidence, as theories of human progress became more triumphalist, less nuanced, and less tolerant of cultural difference. At the same time, imperial expansion abroad came to be seen as a political project that might assist the emergence of stable liberal democracies within Europe. Pitts shows that liberal thinkers usually celebrated for respecting not only human equality and liberty but also pluralism supported an inegalitarian and decidedly nonhumanitarian international politics. Yet such moments represent not a necessary feature of liberal thought but a striking departure from views shared by precisely those late-eighteenth-century thinkers whom Mill and Tocqueville saw as their forebears. Fluently written, A Turn to Empire offers a novel assessment of modern political thought and international justice, and an illuminating perspective on continuing debates over empire, intervention, and liberal political commitments. (shrink)

Classical and quantum field theory provide not only realistic examples of extant notions of empirical equivalence, but also new notions of empirical equivalence, both modal and occurrent. A simple but modern gravitational case goes back to the 1890s, but there has been apparently total neglect of the simplest relativistic analog, with the result that an erroneous claim has taken root that Special Relativity could not have accommodated gravity even if there were no bending of light. The fairly recent acceptance of (...) nonzero neutrino masses shows that widely neglected possibilities for nonzero particle masses have sometimes been vindicated. In the electromagnetic case, there is permanent underdetermination at the classical and quantum levels between Maxwell's theory and the one-parameter family of Proca's electromagnetisms with massive photons, which approximate Maxwell's theory in the limit of zero photon mass. While Yang–Mills theories display similar approximate equivalence classically, quantization typically breaks this equivalence. A possible exception, including unified electroweak theory, might permit a mass term for the photons but not the Yang–Mills vector bosons. Underdetermination between massive and massless (Einstein) gravity even at the classical level is subject to contemporary controversy. (shrink)

Since Leibniz's time, Cartesian mental causation has been criticized for violating the conservation of energy and momentum. Many dualist responses clearly fail. But conservation laws have important neglected features generally undermining the objection. Conservation is _local_, holding first not for the universe, but for everywhere separately. The energy in any volume changes only due to what flows through the boundaries. Constant total energy holds if the global summing-up of local conservation laws converges; it probably doesn't in reality. Energy conservation holds (...) if there is symmetry, the sameness of the laws over time. Thus, if there are time-places where symmetries fail due to nonphysical influence, conservation laws fail there and then, while holding elsewhere, such as refrigerators and stars. Noether's converse first theorem shows that conservation laws imply symmetries. Thus conservation trivially nearly entails the causal closure of the physical. But expecting conservation to hold in the brain simply assumes the falsehood of Cartesianism. Hence Leibniz's objection begs the question. Empirical neuroscience is another matter. So is Einstein's General Relativity: far from providing a loophole, General Relativity makes mental causation _harder_. (shrink)

In General Relativity in Hamiltonian form, change has seemed to be missing, defined only asymptotically, or otherwise obscured at best, because the Hamiltonian is a sum of first-class constraints and a boundary term and thus supposedly generates gauge transformations. Attention to the gauge generator G of Rosenfeld, Anderson, Bergmann, Castellani et al., a specially _tuned sum_ of first-class constraints, facilitates seeing that a solitary first-class constraint in fact generates not a gauge transformation, but a bad physical change in electromagnetism or (...) General Relativity. The change spoils the Lagrangian constraints, Gauss's law or the Gauss-Codazzi relations describing embedding of space into space-time, in terms of the physically relevant velocities rather than auxiliary canonical momenta. But the resemblance between the gauge generator G and the Hamiltonian H leaves still unclear where objective change is in GR. Insistence on Hamiltonian-Lagrangian equivalence, a theme emphasized by Castellani, Sugano, Pons, Salisbury, Shepley and Sundermeyer among others, holds the key. Taking objective change to be ineliminable time dependence, one recalls that there is change in vacuum GR just in case there is no time-like vector field xi^a satisfying Killing's equation L_xi g_mn=0, because then there exists no coordinate system such that everything is independent of time. Throwing away the spatial dependence of GR for convenience, one finds explicitly that the time evolution from Hamilton's equations is real change just when there is no time-like Killing vector. The inclusion of a massive scalar field is simple. No obstruction is expected in including spatial dependence and coupling more general matter fields. Hence change is real and local even in the Hamiltonian formalism. The considerations here resolve the Earman-Maudlin standoff over change in Hamiltonian General Relativity: the Hamiltonian formalism is helpful, and, suitably reformed, it does not have absurd consequences for change and observables. Hence the classical problem of time is resolved. The Lagrangian-equivalent Hamiltonian analysis of change in General Relativity is compared to Belot and Earman's treatment. The more serious quantum problem of time, however, is not automatically resolved due to issues of quantum constraint imposition. (shrink)

The widely touted discovery of mirror neurons has generated intense scientific interest in the neurobiology of intersubjectivity. Social neuroscientists have claimed that mirror neurons, located in brain regions associated with motor action, facial recognition, and somatosensory processing, allow us to automatically grasp other people's intentions and emotions. Despite controversies, mirror neuron research is animating materialist, affective, and embodied accounts of intersubjectivity. My view is that mirror neurons raise issues that are directly relevant to feminism and cultural studies, but interventions are (...) needed for the work to be compatible with nonreductionist critical thought. In this article I critique the dominant neuroscientific account of mirror neurons, called embodied simulation theory. I draw from feminist epistemologies as well as alternative interpretations of mirror neurons in cognitive science and philosophy of mind to consider mirroring as situated, embodied perception. (shrink)

The general aim of this paper is to provide insight into the relevance of critical phenomenology for the study of the patient-provider relationship in health care systems in U.S. jails, prisons, and detention facilities. In particular, I utilize tools from the work of scholars studying phenomenological approaches to health care and structural forms of oppression to analyze several harms that arise from the provision of medical care under the punitive constraints of carceral facilities.

In Dirac-Bergmann constrained dynamics, a first-class constraint typically does not _alone_ generate a gauge transformation. By direct calculation it is found that each first-class constraint in Maxwell's theory generates a change in the electric field E by an arbitrary gradient, spoiling Gauss's law. The secondary first-class constraint p^i,_i=0 still holds, but being a function of derivatives of momenta, it is not directly about E. Only a special combination of the two first-class constraints, the Anderson-Bergmann -Castellani gauge generator G, leaves E (...) unchanged. This problem is avoided if one uses a first-class constraint as the generator of a _canonical transformation_; but that partly strips the canonical coordinates of physical meaning as electromagnetic potentials and makes the electric field depend on the smearing function, bad behavior illustrating the wisdom of the Anderson-Bergmann Lagrangian orientation of interesting canonical transformations. The need to keep gauge-invariant the relation dot{q}- dH/dp= -E_i -p^i=0 supports using the primary Hamiltonian rather than the extended Hamiltonian. The results extend the Lagrangian-oriented reforms of Castellani, Sugano, Pons, Salisbury, Shepley, _etc._ by showing the inequivalence of the extended Hamiltonian to the primary Hamiltonian even for _observables_, properly construed in the sense implying empirical equivalence. Dirac and others have noticed the arbitrary velocities multiplying the primary constraints outside the canonical Hamiltonian while apparently overlooking the corresponding arbitrary coordinates multiplying the secondary constraints _inside_ the canonical Hamiltonian, and so wrongly ascribed the gauge quality to the primaries alone, not the primary-secondary team G. Hence the Dirac conjecture about secondary first-class constraints rests upon a false presupposition. The usual concept of Dirac observables should also be modified to employ the gauge generator G, not the first-class constraints separately, so that the Hamiltonian observables become equivalent to the Lagrangian ones such as the electromagnetic field F. (shrink)

Recent work on the history of General Relativity by Renn, Sauer, Janssen et al. shows that Einstein found his field equations partly by a physical strategy including the Newtonian limit, the electromagnetic analogy, and energy conservation. Such themes are similar to those later used by particle physicists. How do Einstein's physical strategy and the particle physics derivations compare? What energy-momentum complex did he use and why? Did Einstein tie conservation to symmetries, and if so, to which? How did his work (...) relate to emerging knowledge of the canonical energy-momentum tensor and its translation-induced conservation? After initially using energy-momentum tensors hand-crafted from the gravitational field equations, Einstein used an identity from his assumed linear coordinate covariance x'=Mx to relate it to the canonical tensor. Usually he avoided using matter Euler-Lagrange equations and so was not well positioned to use or reinvent the Herglotz-Mie-Born understanding that the canonical tensor was conserved due to translation symmetries, a result with roots in Lagrange, Hamilton and Jacobi. Whereas Mie and Born were concerned about the canonical tensor's asymmetry, Einstein did not need to worry because his Entwurf Lagrangian is modeled not so much on Maxwell's theory as on a scalar theory. Einstein's theory thus has a symmetric canonical energy-momentum tensor. But as a result, it also has 3 negative-energy field degrees of freedom. Thus the Entwurf theory fails a 1920s-30s a priori particle physics stability test with antecedents in Lagrange's and Dirichlet's stability work; one might anticipate possible gravitational instability. This critique of the Entwurf theory can be compared with Einstein's 1915 critique of his Entwurf theory for not admitting rotating coordinates and not getting Mercury's perihelion right. One can live with absolute rotation but cannot live with instability. Particle physics also can be useful in the historiography of gravity and space-time, both in assessing the growth of objective knowledge and in suggesting novel lines of inquiry to see whether and how Einstein faced the substantially mathematical issues later encountered in particle physics. This topic can be a useful case study in the history of science on recently reconsidered questions of presentism, whiggism and the like. Future work will show how the history of General Relativity, especially Noether's work, sheds light on particle physics. (shrink)

This essay is an introduction to the cluster on Latina feminism published in Hypatia (Spring 2016), Vo. 31 (2), which features essays on various areas of Latina feminisms as well as discussions on the intersection of Latina feminisms and the work of thinkers such as Mikhail Bakhtin, Simone de Beauvoir, Enrique Dussell, Immanuel Kant, Édouard Glissant, Walter Mignolo, and Friedrich Nietzsche. Contributors to the cluster include Stephanie Rivera Berruz, Cynthia M. Paccacerqua, Andrea J. Pitts, Monique Roelofs, Susan C. (...) Méndez, Gabriela Veronelli, and Elena Flores Ruiz. (shrink)

It is widely believed that one should not become more confident that all swans are white and all lions are brave simply by observing white swans. Irrelevant conjunction or “tacking” of a theory onto another is often thought problematic for Bayesianism, especially given the ratio measure of confirmation considered here. It is recalled that the irrelevant conjunct is not confirmed at all. Using the ratio measure, the irrelevant conjunction is confirmed to the same degree as the relevant conjunct, which, it (...) is argued, is ideal: the irrelevant conjunct is irrelevant. Because the past’s really having been as it now appears to have been is an irrelevant conjunct, present evidence confirms theories about past events only insofar as irrelevant conjunctions are confirmed. Hence the ideal of not confirming irrelevant conjunctions would imply that historical claims are not confirmed. Confirmation measures partially realizing that ideal make the confirmation of historical claims by present evidence depend strongly on the (presumably subjective) degree of belief in the irrelevant conjunct. The unusually good behavior of the ratio measure has a bearing on the problem of measure sensitivity. For non-statistical hypotheses, Bayes’ theorem yields a fractional linear transformation in the prior probability, not a linear rescaling, so even the ratio measure arguably does not aptly measure confirmation in such cases. (shrink)

An overlap between the general relativist and particle physicist views of Einstein gravity is uncovered. Noether's 1918 paper developed Hilbert's and Klein's reflections on the conservation laws. Energy-momentum is just a term proportional to the field equations and a "curl" term with identically zero divergence. Noether proved a \emph{converse} "Hilbertian assertion": such "improper" conservation laws imply a generally covariant action. Later and independently, particle physicists derived the nonlinear Einstein equations assuming the absence of negative-energy degrees of freedom for stability, along (...) with universal coupling: all energy-momentum including gravity's serves as a source for gravity. Those assumptions imply that the energy-momentum is only a term proportional to the field equations and a symmetric curl, which implies the coalescence of the flat background geometry and the gravitational potential into an effective curved geometry. The flat metric, though useful in Rosenfeld's stress-energy definition, disappears from the field equations. Thus the particle physics derivation uses a reinvented Noetherian converse Hilbertian assertion in Rosenfeld-tinged form. The Rosenfeld stress-energy is identically the canonical stress-energy plus a Belinfante curl and terms proportional to the field equations, so the flat metric is only a convenient mathematical trick without ontological commitment. Neither generalized relativity of motion, nor the identity of gravity and inertia, nor substantive general covariance is assumed. The more compelling criterion of lacking ghosts yields substantive general covariance as an output. Hence the particle physics derivation, though logically impressive, is neither as novel nor as ontologically laden as it has seemed. (shrink)

Plausibly, only moral agents can bear action-demanding duties. Not all groups are moral agents. This places constraints on which groups can bear action-demanding duties. Moreover, if such duties imply ability then moral agents – of both the individual and group varieties – can only bear duties over actions they are able to perform. I tease out the implications of this for duties over group actions, and argue that groups in many instances cannot bear these duties. This is because only groups (...) with the right kind of structure – groups I call ‘collectives’ – have the agency to bear action-demanding duties. Yet neither can individuals bear these duties, assuming that individuals cannot perform group actions and that duty implies ability. This appears to leave us at a loss when assigning duties to perform some group actions. I argue we can solve this problem by assigning collectivization duties to individuals – duties to form a collective that then incurs a duty over the action. I give criteria for when individuals have collectivization duties and discuss the demands these duties place on their bearers. (shrink)

It is a commonplace in the philosophy of physics that any local physical theory can be represented using arbitrary coordinates, simply by using tensor calculus. On the other hand, the physics literature often claims that spinors \emph{as such} cannot be represented in coordinates in a curved space-time. These commonplaces are inconsistent. What general covariance means for theories with fermions, such as electrons, is thus unclear. In fact both commonplaces are wrong. Though it is not widely known, Ogievetsky and Polubarinov constructed (...) spinors in coordinates in 1965, enhancing the unity of physics and helping to spawn particle physicists' concept of nonlinear group representations. Roughly and locally, these spinors resemble the orthonormal basis or "tetrad" formalism in the symmetric gauge, but they are conceptually self-sufficient and more economical. The typical tetrad formalism is de-Ockhamized, with six extra field components and six compensating gauge symmetries to cancel them out. The Ogievetsky-Polubarinov formalism, by contrast, is Ockhamized, with most of the fluff removed. As developed nonperturbatively by Bilyalov, it admits any coordinates at a point, but "time" must be listed first. Here "time" is defined in terms of an eigenvalue problem involving the metric components and the matrix $diag$, the product of which must have no negative eigenvalues in order to yield a real symmetric square root that is a function of the metric. Thus even formal general covariance requires reconsideration; the atlas of admissible coordinate charts should be sensitive to the types and \emph{values} of the fields involved. Apart from coordinate order and the usual spinorial two-valuedness, Ogievetsky-Polubarinov spinors form, with the metric, a nonlinear geometric object, for which important results on Lie and covariant differentiation are recalled. Such spinors avoid a spurious absolute object in the Anderson-Friedman analysis of substantive general covariance. They also permit the gauge-invariant localization of the infinite-component gravitational energy in General Relativity. Density-weighted spinors exploit the conformal invariance of the massless Dirac equation to show that the volume element is absent. Thus instead of an arbitrary nonsingular matrix with 16 components, 6 of which are gauged away by a new local $O$ gauge group and one of which is irrelevant due to conformal covariance, one can, and presumably should, use density-weighted Ogievetsky-Polubarinov spinors coupled to the 9-component symmetric square root of the part of the metric that fixes null cones. Thus $\frac{7}{16}$ of the orthonormal basis is eliminated as surplus structure. Greater unity between spinors and tensors and the like is achieved, such as regarding conservation laws. Regarding the conventionality of simultaneity, an unusually wide range of $\epsilon$ values is admissible, but some extreme values are inadmissible. Standard simultaneity uniquely makes the spinor transformation law linear and independent of the metric, because transformations among the standard Cartesian coordinate systems fall within the conformal group, for which the spinor transformation law is linear. The surprising mildness of the restrictions on coordinate order as applied to the Schwarzschild solution is exhibited. (shrink)

Change and local spatial variation are missing in canonical General Relativity's observables as usually defined, an aspect of the problem of time. Definitions can be tested using equivalent formulations of a theory, non-gauge and gauge, because they must have equivalent observables and everything is observable in the non-gauge formulation. Taking an observable from the non-gauge formulation and finding the equivalent in the gauge formulation, one requires that the equivalent be an observable, thus constraining definitions. For massive photons, the de Broglie-Proca (...) non-gauge formulation observable A_{\mu} is equivalent to the Stueckelberg-Utiyama gauge formulation quantity A_{\mu} + \partial_{\mu} \phi, which must therefore be an observable. To achieve that result, observables must have 0 Poisson bracket not with each first-class constraint, but with the Rosenfeld-Anderson-Bergmann-Castellani gauge generator G, a tuned sum of first-class constraints, in accord with the Pons-Salisbury-Sundermeyer definition of observables. The definition for external gauge symmetries can be tested using massive gravity, where one can install gauge freedom by parametrization with clock fields X^A. The non-gauge observable g^{\mu\nu} has the gauge equivalent X^A,_{\mu} g^{\mu\nu} X^B,_{\nu}. The Poisson bracket of X^A,_{\mu} g^{\mu\nu} X^B,_{\nu} with G turns out to be not 0 but a Lie derivative. This non-zero Poisson bracket refines and systematizes Kuchař's proposal to relax the 0 Poisson bracket condition with the Hamiltonian constraint. Thus observables need covariance, not invariance, in relation to external gauge symmetries. The Lagrangian and Hamiltonian for massive gravity are those of General Relativity + \Lambda + 4 scalars, so the same definition of observables applies to General Relativity. Local fields such as g_{\mu\nu} are observables. Thus observables change. Requiring equivalent observables for equivalent theories also recovers Hamiltonian-Lagrangian equivalence. (shrink)

Philosophizing the Americas establishes the field of inter-American philosophy. Bringing together contributors who work in Africana Philosophy, Afro-Caribbean philosophy, Latin American philosophy, Afro-Latin philosophy, decolonial theory, and African American philosophy, the volume examines the full range of traditions that have, separately and in conversation with each other, worked through how philosophy in both establishes itself in the Americas and engages with the world from which it emerges. The book traces a range of questions, from the history of philosophy in the (...) Americas to philosophical questions of race, feminism, racial eliminativism, creolization, epistemology, coloniality, aesthetics, and literature. The essays place an impressive range of philosophical traditions and figures into dialogue with one another: some familiar, such as José Martí, Sylvia Wynter, Martin R. Delany, José Vasconcelos, Alain Locke, as well as such less familiar thinkers as Arturo Alfonso Schomburg, Hilda Hilst, and George Lamming. In each chapter, the contributors find fascinating and productive matrices of tension or convergence in works throughout the Americas. The result is an original and important contribution to knowledge that introduces readers from various disciplines to unfamiliar yet compelling ideas and considers familiar texts from novel and prescient perspectives. Philosophizing the Americas stands alone as a representation of current scholarly debates in the field of inter-American philosophy. Contributors: Stephanie Rivera Berruz, Jacoby Adeshei Carter, Nadia Celis, Tommy J. Curry, Hernando A. Estévez, Daniel Fryer, James B. Haile III, Chike Jeffers, Lee A. McBride III, Michael Monahan, Adriana Novoa, Susana Nuccetelli, Andrea J. Pitts, Dwayne A. Tunstall, and Alejandro A. Vallega. (shrink)

Change and local spatial variation are missing in Hamiltonian general relativity according to the most common definition of observables as having 0 Poisson bracket with all first-class constraints. But other definitions of observables have been proposed. In pursuit of Hamiltonian–Lagrangian equivalence, Pons, Salisbury and Sundermeyer use the Anderson–Bergmann–Castellani gauge generator G, a tuned sum of first-class constraints. Kuchař waived the 0 Poisson bracket condition for the Hamiltonian constraint to achieve changing observables. A systematic combination of the two reforms might use (...) the gauge generator but permit non-zero Lie derivative Poisson brackets for the external gauge symmetry of General Relativity. Fortunately one can test definitions of observables by calculation using two formulations of a theory, one without gauge freedom and one with gauge freedom. The formulations, being empirically equivalent, must have equivalent observables. For de Broglie-Proca non-gauge massive electromagnetism, all constraints are second-class, so everything is observable. Demanding equivalent observables from gauge Stueckelberg–Utiyama electromagnetism, one finds that the usual definition fails while the Pons–Salisbury–Sundermeyer definition with G succeeds. This definition does not readily yield change in GR, however. Should GR’s external gauge freedom of general relativity share with internal gauge symmetries the 0 Poisson bracket, or is covariance sufficient? A graviton mass breaks the gauge symmetry, but it can be restored by parametrization with clock fields. By requiring equivalent observables, one can test whether observables should have 0 or the Lie derivative as the Poisson bracket with the gauge generator G. The latter definition is vindicated by calculation. While this conclusion has been reported previously, here the calculation is given in some detail. (shrink)

Two unique aspects of spinoza's theory of freedom of expression are explored in depth-Its articulation of a positive liberty of expression, And the distinction it draws between pure expressive acts and speech intended as action. Spinoza's theory is then applied to cases where speech causes harm. His theory is explicitly distinguished from that of mill, And it is concluded that his theory, Although not without faults, Avoids several difficulties of other liberal theories.

This article considers women's use of the body as a site of protest by taking up women's participation in non-mainstream body modification. The use of scarification, multiple genital piercing and other practices by women in the lesbian SM movement has been considered self-mutilative (Jeffries, 1994). This article takes a different, but not uncritical, approach by examining the `reclaiming' discourse surrounding these practices and considering how this discourse reflects the feminist poststructuralist project of identity subversion.

In the closing years of the eighteenth century, a great intellectual and moral challenge to European empire was launched by many of the most innovative thinkers of the day, including Kant, Adam Smith, Bentham, Burke, Diderot, and Condorcet. They drew on a strikingly wide range of ideas to argue against empire: among others, the rights of man and the imperative of popular self‐determination, the economic wisdom of free trade and foolishness of conquest, the corruption of natural man by a degenerate (...) civilization, the hypocrisy required for self‐governing republics to rule despotically over powerless subjects, and the impossibility of sustaining freedom at home while practicing despotism abroad. (shrink)

A physical framework has been proposed which describes manifestly covariant relativistic evolution using a scalar time τ. Studies in electromagnetism, measurement, and the nature of time have demonstrated that in this framework, electromagnetism must be formulated in terms of τ-dependent fields. Such an electromagnetic theory has been developed. Gravitation must also use of τ-dependent fields, but many references do not take the metric's dependence on τ fully into account. Others differ markedly from general relativity in their formulation. In contrast, this (...) paper outlines steps towards a τ-dependent classical intrinsic formulation of gravitation, patterned after general relativity, which we call parametrized general relativity (PGR). Given the existence of a preferred foliation, the Hamiltonian constraint is removed. We find that some nonmetricity in the connection is allowed, unlike in general relativity. Conditions on the allowable nonmetricity are found. Consideration of the initial value problem confirms that the metric signature should normally be O(3, 2) rather than O(4, 1). Following the lead of earlier works, we argue that concatenation (integration over τ) is unnecessary for relating parametrized physics to experience, and propose an alternative to it. Finally, we compare and contrast PGR with other relevant gravitational theories. (shrink)

The A-theory of time has intuitive and metaphysical appeal, but suffers from tension, if not inconsistency, with the special and general theories of relativity (STR and GTR). The A-theory requires a notion of global simultaneity invariant under the symmetries of the world's laws, those ostensible transformations of the state of the world that in fact leave the world as it was before. Relativistic physics, if read in a realistic sense, denies that there exists any notion of global simultaneity that is (...) invariant under the symmetries of the world's laws. If physics is at least a decent guide to metaphysics--as sympathies for scientific realism would suggest--then relativistic physics supports the B-theory. If there were a physically natural way to modify the symmetries of the physical laws so as to remove those that are repugnant to the A-theory, while retaining empirical adequacy, then such an altered physics might be attractive to the A-theorist and would weaken the support given by relativity to the B-theory. I exhibit a way to do so here, displaying a Lagrangian density explicitly containing distant simultaneity, yet implying Einstein's field equations. The modification involves a change in the nature of the lapse function and makes use of the Dirac-Bergmann formalism of constrained dynamics, which recently has been discussed much by John Earman. Here this formalism is adapted slightly to permit both local and global generalized coordinates. A classification of senses in which time might be absolute or not is made along the way. Some suggestions for extending the work by finding a first principles motivation are made. An appendix outlines an argument why many local presents are insufficient and a global present is attractive, while two more appendices review the Dirac-Bergmann apparatus for GTR and then apply it to the theory at hand. (shrink)

Hastings Center Report, Volume 52, Issue 3, Page 9-17, May–June 2022.

Trans philosophy—like everything else—has a history. The 1990s was a pivotal decade for the academic development of trans philosophy in the United States and Canada. During this period, the broader interdisciplinary field of transgender studies was beginning to emerge, and professional philosophy’s own contributions to transgender studies were starting to take shape as well. In what follows, we hear from Talia Mae Bettcher, Loren Cannon, Miqqi Alicia Gilbert, and Jacob Hale, four trans philosophers whose writings and activism helped provide the (...) contours of what is now becoming a robust and thriving area of study within academic philosophy. (shrink)

Is change missing in Hamiltonian Einstein–Maxwell theory? Given the most common definition of observables, observables are constants of the motion and nonlocal. Unfortunately this definition also implies that the observables for massive electromagnetism with gauge freedom are inequivalent to those of massive electromagnetism without gauge freedom. The alternative Pons–Salisbury–Sundermeyer definition of observables, aiming for Hamiltonian–Lagrangian equivalence, uses the gauge generator G, a tuned sum of first-class constraints, rather than each first-class constraint separately, and implies equivalent observables for equivalent massive electromagnetisms. (...) For General Relativity, G generates 4-dimensional Lie derivatives for solutions. The Lie derivative compares different space-time points with the same coordinate value in different coordinate systems, like 1 a.m. summer time versus 1 a.m. standard time, so a vanishing Lie derivative implies constancy rather than covariance. Requiring equivalent observables for equivalent formulations of massive gravity confirms that G must generate the 4-dimensional Lie derivative for observables. These separate results indicate that observables are invariant under internal gauge symmetries but covariant under external gauge symmetries, but can this bifurcated definition work for mixed theories such as Einstein–Maxwell theory? Pons, Salisbury and Shepley have studied G for Einstein–Yang–Mills. For Einstein–Maxwell, both \ and \ are invariant under electromagnetic gauge transformations and covariant under 4-dimensional coordinate transformations. Using the bifurcated definition, these quantities count as observables, as one would expect on non-Hamiltonian grounds. (shrink)

Reflective equilibrium between physics and philosophy, and between GR and particle physics, is fruitful and rational. I consider the virtues of simplicity, conservatism, and conceptual coherence, along with perturbative expansions. There are too many theories to consider. Simplicity supplies initial guidance, after which evidence increasingly dominates. One should start with scalar gravity; evidence required spin 2. Good beliefs are scarce, so don't change without reason. But does conservatism prevent conceptual innovation? No: considering all serious possibilities could lead to Einstein's equations. (...) GR is surprisingly intelligible. Energy localization makes sense if one believes Noether mathematics: an infinity of symmetries shouldn't produce just one energy. Hamiltonian change results from Lagrangian-equivalence. Causality poses conceptual questions. For GR, what are canonical 'equal-time' commutators? For massive spin 2, background causality exists but is violated. Both might be cured by engineering a background null cone respected by a gauge groupoid. Perturbative expansions can enlighten. They diagnose Einstein's 1917 'mass'-Lambda analogy. Ogievetsky-Polubarinov invented an infinity of massive spin 2 gravities---including ghost-free de Rham-Gabadadze-Tolley theories!---perturbatively, and achieved the impossible : spinors in coordinates. (shrink)

Paralleling the formal derivation of general relativity as a flat spacetime theory, we introduce in addition a preferred temporal foliation. The physical interpretation of the formalism is considered in the context of 5-dimensional “parametrized” and 4-dimensional preferred frame contexts. In the former case, we suggest that our earlier proposal of unconcatenated parametrized physics requires that the dependence on τ be rather slow. In the 4-dimensional case, we consider and tentatively reject several areas of physics that might require a preferred foliation, (...) but find a need for one in the process (“flowing”) theory of time. We then suggest why such a foliation might reasonably be unobservable. (shrink)

The Anderson-Friedman absolute objects program has been a favorite analysis of the substantive general covariance that supposedly characterizes Einstein's General Theory of Relativity (GTR). Absolute objects are the same locally in all models (modulo gauge freedom). Substantive general covariance is the lack of absolute objects. Several counterexamples have been proposed, however, including the Jones-Geroch dust and Torretti constant curvature spaces counterexamples. The Jones-Geroch dust case, ostensibly a false positive, is resolved by noting that holes in the dust in some models (...) ensure that no physically relevant nonvanishing timelike vector field exists there, so no absolute object exists. The Torretti constant curvature spaces case, allegedly a false negative, is resolved by testing an irreducible piece of the metric, the conformal metric density of weight -2/3, for absoluteness; this geometric object is absolute. A new counterexample is proposed involving the orthonormal tetrad said to be necessary to couple spinors to a curved metric. The threat of finding an absolute object in GTR + spinors is overcome by the use of an alternative spinor formalism that takes a symmetric square root of the metric (with the help of the matrix diag(-1,1,1,1)), eliminating 6 of the 16 tetrad components as irrelevant. The importance of eliminating irrelevant structures, as Anderson emphasized, is clear. The importance of the choice of physical fields is also evident. A new counterexample due to Robert Geroch and Domenico Giulini, however, finds an absolute object in vacuum GTR itself, namely the scalar density $g$ given by the metric components' determinant. Thus either the definition of absoluteness or its use to analyze GTR's substantive general covariance is flawed. Anderson's belief that all absolute objects are nonvariational (that is, not varied in a suitable action principle) and vice versa is also falsified by the Geroch-Giulini counterexample. However, it remains plausible that all nonvariational fields are absolute, so adding nonvariationality as a necessary condition for absoluteness, as Hiskes once suggested, would likely leave no useful work to the Anderson-Friedman condition of sameness in all models. Simply having only variational fields in an action principle (suitably free of irrelevant fields) might be a satisfactory analysis of substantive general covariance, if one exists. This proposal also resembles the suggestion that GTR is "already parameterized," if one decides to parameterize theories by defining the nonvariational fields in terms of preferred coordinates called clock fields. More questions need to be addressed. Which fields should be tested for absoluteness: only primitive fields (which ones?), or all or some (which?) of their concomitants also? Geroch observes that some kinds of geometric objects, such as tangent vectors, scalar densities, and tangent vector densities of non-unit weight, satisfy the condition of sameness in all models if they merely fail to vanish. If these "susceptible" geometric objects can hardly help being absolute, to what degree are they, or the theories harboring them, responsible for this absoluteness? The answer to this question helps to determine the significance of the Geroch-Giulini counterexample. (shrink)

One of the most pressing issues that confronts the Food and Drug Administration (FDA) is learning how to better address and assist in medical product development. FDA needs to prepare today so the agency can efficiently evaluate the technologies of tomorrow. Clearly, this is an area that impacts not only health care consumers but also our economies and financial markets. If the FDA can be a more aggressive part of the solution, they can help not only ease some of the (...) pressures that are driving up health care costs but also help all of us to maximize the value of medical innovations. The high cost of research and development is forcing many companies to make the short-term business decision to focus product development on those molecules that have a much higher potential to recoup expenditures. Unfortunately, this trumps attempts to develop potentially risky but breakthrough products for diseases affecting smaller populations, the orphan drugs. FDA's critical path initiative will enable innovative growth companies to better and more efficiently attack the steep hurdles facing them, allowing them to compete more effectively against the bigger, better-funded players in the market on a more level playing field. That means a real change in the risk/benefit equation for both the emerging growth companies and the public health. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Looking Back and Moving ForwardDebbie PittsI started my Nursing Assistant career forty-three years ago and have worked in the same long-term care facility for the past forty years now. Over the years, I have seen many cultural changes being made in the field. Back then everyone was referred to as patients, then residents and more recently elders. As these changes took place, it was difficult for us to change (...) in the sense of calling them patients to residents and now elders but we all manage to accomplish it. Our elders have so many more choices nowadays, which has been a wonderful additive for those who live in a facility.As I look back, I can remember when restraints were used routinely. The good old locked Posey belts, pelvic restraints, vest restraints and how many other types that we used to use. Already many years have passed since we have used these things and that is a blessing as they were nothing more than a pain to use for us and our elders. Sometimes they would be so knotted it was difficult to get them untied. I can remember that many who needed to have these were people that had symptoms of now what we call Alzheimer's or people with some sort of dementia. Back then they were unsure of this disease. These were definitely some challenging times to work in. Taking care of the combative person can be very difficult. At least now, we have much more knowledge through education as to how to handle and deal with these issues. I have been fortunate in my facility that we thrive on education, which helps me learn all the modern techniques and ways of dealing with the many issues we have today with dementias.When I go to work daily, I not only have to take care of my elders, but then I also have to deal with their families as well. This too, can be somewhat difficult at times. Some of them can become quite demanding with the cares needed for their loved one. After dealing with them I often find that they have a guilty feeling for having to place them in a nursing home, but it can still create a problem for you and make it hard to get your cares done for other elders on your daily schedule. As much as I try to reassure them that their family member is getting the best care and attention they need, sometimes it isn't enough to satisfy them. There are times if I feel pressured or frustrated I will talk with my supervisor, or a social worker, and ask them if they could have a talk with the family for me. I find that having [End Page 143] good communication with every department and all supervisors is vitally important in my job. Unlike years ago, today we are all a team and are there for our elders and their every need.On a more personal level, with my daily routine in care, I love when I can take my elder for a walk. Sometimes they may be fearful of falling or something else. Using reassurance and encouragement and getting them going can be a very rewarding situation. It's when they don't believe they are capable of doing this, and then they do, when you realize just how much you have done for them. The smiles, thank yous and hugs I get back can just warm your heart and even put tears in your eyes. The sense of accomplishment provided for them is very rewarding. This is just so true whether it be walking, eating, bathing or dressing. Taking the time to work individually with each elder on whatever levels needed is so important. When they tell their family member about their accomplishment that they achieved today, they are so proud. The smiles, twinkle in their eyes and the excitement shown is just amazing. Sometimes at this point I can develop a relationship with the difficult family member. Normally they will be happy for their loved one's accomplishment and grateful to you for helping them. My personal accomplishment is becoming a... (shrink)

In a framework describing manifestly covariant relativistic evolution using a scalar time τ, consistency demands that τ-dependent fields be used. In recent work by the authors, general features of a classical parametrized theory of gravitation, paralleling general relativity where possible, were outlined. The existence of a preferred “time” coordinate τ changes the theory significantly. In particular, the Hamiltonian constraint for τ is removed From the Euler-Lagrange equations. Instead of the 5-dimensional stress-energy tensor, a tensor comprised of 4-momentum density mid flux (...) density only serves as the source. Building on that foundation, in this paper we develop a linear approximate theory of parametrized gravitation in the spirit of the flat spacetime approach to general relativity. Using a modified form of Kraichnan's flat spacetime derivation of general relativity, we extend the linear theory to a family of nonlinear theories in which the flat metric and the gravitational field coalesce into a single effective curved metric. (shrink)

The Anderson-Friedman absolute objects project is reviewed. The Jones-Geroch dust 4-velocity counterexample is resolved by eliminating irrelevant structure. Torretti's example involving constant curvature spaces is shown to have an absolute object on Anderson's analysis. The previously neglected threat of an absolute object from an orthonormal tetrad used for coupling spinors to gravity appears resolvable by eliminating irrelevant fields and using a modified spinor formalism. However, given Anderson's definition, GTR itself has an absolute object (as Robert Geroch has observed recently): a (...) change of variables to a conformal metric density and a scalar density shows that the latter is absolute. (shrink)

Theory in Africa, Africa in Theory explores the place of Africa in archaeological theory, and the place of theory in African archaeology. The centrality of African models in reconstructions is explored, focusing on materiality and agency in the past. The differences between how African models are used in western theoretical discourse and the use of that theory within Africa are also highlighted, as a means to explore the nature of theory itself. Thus, this dual purposed volume is a timely intervention (...) into archaeological theory, deconstructing the taken-for-granted foundations of the ways we approach the past. (shrink)

College of Medicine, University of South Alabama Mobile, AL 36688-0002, USA wbp501{at}jaguar1.usouthal.edu ' + u + '@' + d + ' '//--> Abstract Recent work in viral genomics has shown that bacteriophages exhibit a high degree of mosaicism, which is most likely due to a long history of prolific horizontal gene transfer (HGT). Given these findings, we argue that each of the most plausible attempts to properly classify bacteriophages into distinct species fail. Mayr's biological species concept fails because there is (...) no useful viral analog to sexual reproduction. Phenetic species concepts fail because they obscure the mosaicism and the rich reticulated viral histories. Phylogenetic species concepts, even when extended to take into account reticulation, fail because there is no non-arbitrary distinction between recombination events that create a new viral species and those that do not. There is good reason to think that bacteriophages, arguably the Earth's most abundant biological agent, evolve without forming species. Introduction The Biology of Viruses 2.1 Bacteriophage life cycles 2.2 Mechanisms of HGT The Species Problem and Species Concepts 3.1 Phenetic species concepts 3.2 The biological species concept 3.3 Phylogenetic species concepts 3.4 The ecological species concept 3.5 Homeostatic property cluster species Viruses and Species Taxonomy Reticular Phylogenies Conclusion CiteULike Connotea Del.icio.us What's this? (shrink)

This document collects discussion and commentary on issues raised in the workshop by its participants. Contributors are: Greg Frost-Arnold, David Harker, P. D. Magnus, John Manchak, John D. Norton, J. Brian Pitts, Kyle Stanford, Dana Tulodziecki.

Recent work in viral genomics has shown that bacteriophages exhibit a high degree of mosaicism, which is most likely due to a long history of prolific horizontal gene transfer (HGT). Given these findings, we argue that each of the most plausible attempts to properly classify bacteriophages into distinct species fail. Mayr's biological species concept fails because there is no useful viral analog to sexual reproduction. Phenetic species concepts fail because they obscure the mosaicism and the rich reticulated viral histories. Phylogenetic (...) species concepts, even when extended to take into account reticulation, fail because there is no non-arbitrary distinction between recombination events that create a new viral species and those that do not. There is good reason to think that bacteriophages, arguably the Earth's most abundant biological agent, evolve without forming species.1. Introduction2. The Biology of Viruses2.1. Bacteriophage life cycles2.2. Mechanisms of HGT3. The Species Problem and Species Concepts3.1. Phenetic species concepts3.2. The biological species concept3.3. Phylogenetic species concepts3.4. The ecological species concept3.5. Homeostatic property cluster species4. Viruses and Species Taxonomy5. Reticular Phylogenies6. Conclusion. (shrink)

This paper seeks to challenge the “fixed line” between disciplines by exploring the interconnections of Sociology and Caribbean Literature. It highlights the Caribbean author as a social activist and policymaker whose aim is to agitate for improvement in various social conditions. The writings of three Caribbean authors—Erna Brodber of Jamaica, as well Frank McField and Roy Bodden of the Cayman Islands—are examined. Through their published and unpublished works, through their fiction and non-fiction, the interconnection between Sociology and Caribbean Literature is (...) explored. Their writings become alternative narratives that address various sociological issues, as the writers are lauded for their social activism which gave a small community in Jamaica its history and which pleads for the youth and agitates for education in the Cayman Islands. These writers, some of whom are trained sociologists, use their training and knowledge in this field and their expertise in creative writing to demonstrate that the lines of demarcation between the disciplines are becoming increasingly blurred. The paper concludes that this fusing of the disciplines means Caribbean authors can be viewed as social activists and policymakers whose works posit new thoughts and present new possibilities to ailing Jamaica and Cayman societies. (shrink)