29,923 research outputs found

    Relative equilibria and conserved quantities in symmetric Hamiltonian systems

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    These are lectures given at a summer school in 1998. They begin with recalling the basic structure of Hamiltonian systems, and then proceed to discuss the effects of symmetry and the geometry of conservation laws

    Symmetric Hamiltonian bifurcations

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    The purpose of these notes is to give a brief survey of bifurcation theory of Hamiltonian systems with symmetry; they are a slightly extended version of the 5 lectures given by JM on Hamiltonian Systems with Symmetry at the Peyresq Summer School. Attention is focussed on bifurcations near equilibrium solutions and relative equilibria. [Taken from introduction

    Integrability and dynamics of the n-dimensional symmetric Veselova top

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    We consider the the n-dimensional generalisation of the nonholonomic Veselova problem. We derive the reduced equations of motion in terms of the mass tensor of the body and determine some general properties of the dynamics. In particular we give a closed formula for the invariant measure, we indicate the existence of steady rotation solutions, and obtain some results on their stability. We then focus our attention on bodies whose mass tensor has a specific type of symmetry. We show that the phase space is foliated by invariant tori that carry quasi-periodic dynamics in the natural time variable. Our results enlarge the known cases of integrability of the multi-dimensional Veselova top. Moreover, they show that in some previously known instances of integrability, the flow is quasi-periodic without the need of a time reparametrisation

    Engraved portrait of James Nayler (1618–1660)

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    Engraved portrait of James Nayler (1618-1660) by Robert Grave (1768-1825). Inscribed, 'Born at Ardesloe, near Wakefield, in Yorkshire. Was an Independent and served Quarter Master in ye Parliament Army, about the Year 1641. turn'd Quaker in 1651. Punish'd as a Blasphemer 1656. Author of many Books & Dyed at Holm in Huntingtonshire 1660. Aged 44.

    Polyphony and the anxiety of influence in the fiction of Henry James

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    James's fiction, especially in the Middle Phase, centres on the figure of the artist and is characterized by, the two interrelated aspects which previous criticism has largely overlooked: the Bakhtinian 'polyphonic' -creation of 'author-thinkers'; and the conflict between ephebes and precursors, for which Harold-Bloom's concept of 'the-anxiety of influence' is the most illuminating model. Polyphony is the narrative mode, and influence is the intra-artistic, theme. These, as the Introduction to the thesis makes clear, are rehearsed in James's inaugural novel, Roderick Hudson. Rowland Mallet is an author-thinker, and his failure is caused by authorial limitations. His monologism -is impaired by his mistaking empathy for the authorial sympathy. Likewise, Hudson's failure does not arise from a mercurial temperament, but from a polyphonic shortcoming: not possessing the power of fiction to contain the fiction of power in, his mentor. And the relationships among the three artists - Gloriani, Hudson and Singleton - perfectly exemplify the Bloomian-theme. It is these two concepts, polyphony and influence, which are the major preoccupation in the Middle Phase; as, the works chosen demonstrate. These are a novella, a novel, and a number of short stories all of which have been unjustifiably neglected. Chapter One, on The Aspern Papers, argues that Tina Bordereau, far from being, the artless victim seen by many critics, actually challenges and defeats the narrator by the very form of her narrative. Her 'realist' discourse undermines his language of 'romance', and shows up its internal unstability. Chapter Two is an extensive study of the critical reception of The Tragic Muse. The most common areas of critical attention have been its contemporary topicality, its relation to previous novels on similar themes, and the possible genealogy of Gabriel Nash. Those have all missed the core of the work. - Chapter Three demonstrates how polyphony and the anxiety of influence make the novel what it really is. Influence arises from the juxtaposition of, and the wrestling between, artistic ephebes and their precursors (Nick and Nash,, Miriam and Madame Carre). The dialogic quality defined by Bakhtin is crucial to the proper, and even-handed, characterization of all, the conflicts in the novel. And since most of James's tales in the eighties and nineties -are about 'masters - and acolytes, the anxiety of influence remains central. Chapter Four is a study of 'The Author of Beltraffiol' and 'The Lesson of the Master'. Again the characters' manipulations are a crucial focus in a way that G6rard Genette's terminology helps to illuminate. The fact that the ephebe is the author-thinker emphasizes the inextricability of the Bakhtinian and the Bloomian in James. Just as polyphony offers a different focus for explicating the poetics of James's fiction; so the ephebal conflict provides the basis for a fresh perception of James's own artistic struggle

    Dr. James Gillam, Spelman College, September 2011

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    This video is a conversation with Dr. James Gillam. Dr. Gillam talks about his book, "Life and Death in the Central Highlands: An American Sergeant in the Vietnam War 1968-1970". Daniel Le, AUC Woodruff Library, is the interviewer

    James Bond: international man of gastronomy

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    This article is concerned with the representation of food and drink in Ian Fleming’s James Bond novels. In particular, it examines how the author uses Bond’s culinary knowledge and habits of consumption as an important constituent of his hero’s character. Similarly, the food choices of other characters, notably villains, are shown to be linked, by Fleming, to core aspects of their identity − principally their ethnicity. Bond’s impulse to observe and classify, very much in evidence in the novels’ food sequences, is examined in terms of the texts’ construction of Bond as a skilled identifier of signs

    A Tripartite Post-Recession Rebalancing

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    In this latest Advance & Rutgers Report, entitled “A Tripartite Post-Recession Rebalancing,” Dean James W. Hughes and Professor Joseph J. Seneca deliver an incisive assessment of the current market conditions and obstacles in the path of our economic recovery. They offer a statistical cautionary tale that the private and public sector need to hear and acknowledge in order for the economy to make continued progress.This report was published as Issue Paper Number 7, November 2011, in Advance & Rutgers Report

    Geometric mechanics and symmetry: the Peyresq lectures

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    The lectures in this 2005 book are intended to bring young researchers to the current frontier of knowledge in geometrical mechanics and dynamical systems
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