635 research outputs found

    Dennis Walton\u27s Capital Wars

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    [Excerpt] If Steven Spielberg were to make a movie on how the building trades are using their pension funds to create work for their members, the film would be called Capital Wars and Dennis Walton would play the part of Han Solo, says Randy Barber, union advisor and director of the Washington-based Center on Economic Organizing. It\u27s been ten years since Barber co-authored with Jeremy Rifkin the eye-opening expose The North Will Rise Again: Pensions, Politics, and Power in the 1980\u27s, which became a best- seller in the labor movement. Since that time, trade unionists have become increasingly aware that if they sit idly by and let others manage the $1.3 trillion of union-negotiated pension funds, unions will in effect be financing their own destruction. Dennis Walton has become one of the most visible proponents in the labor movement of using this pension money as a weapon to further the union cause

    IAM District 100 Vs. Eastern and the Banks

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    The story that follows is a story of how IAM District 100, step by step, escalated a struggle over almost every major issue facing the labor movement today: concessions, control of corporate investment decisions, the power of the financial industry, management- initiated employee involvement schemes, workers\u27 education, joint control over large corporate pension funds, and union leadership style. The Machinists at Eastern would begin this struggle on the shop floor and eventually take it to Eastern\u27s stockholders meetings and to the boardrooms of the world\u27s largest financial institutions. In this bleak period for labor, where unions are battling daily against corporate demands for concessions, IAM District 100 had the harder task of ending concessions that had already been granted

    Black Hole Remnants and the Information Puzzle

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    Magnetically charged dilatonic black holes have a perturbatively infinite ground state degeneracy associated with an infinite volume throat region of the geometry. A simple argument based on causality is given that these states do not have a description as ordinary massive particles in a low-energy effective field theory. Pair production of magnetic black holes in a weak magnetic field is estimated in a weakly-coupled semiclassical expansion about an instanton and found to be finite, despite the infinite degeneracy of states. This suggests that these states may store the information apparently lost in black hole scattering processes.Comment: 16 pages, revision has 5 figures uuencode

    A Matrix Model for AdS2

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    A matrix quantum mechanics with potential V=q2r2V={q^2 \over r^2} and an SL(2,R) conformal symmetry is conjectured to be dual to two-dimensional type 0A string theory on AdS2_2 with qq units of RR flux.Comment: 12 page

    Reduced dimensionality spin-orbit dynamics of CH3 + HCl reversible arrow CH4 Cl on ab initio surfaces

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    A reduced dimensionality quantum scattering method is extended to the study of spin-orbit nonadiabatic transitions in the CH3 + HCl reversible arrow CH4 + Cl(P-2(J)) reaction. Three two-dimensional potential energy surfaces are developed by fitting a 29 parameter double-Morse function to CCSD(T)/IB//MP2/cc-pV(T+d)Z-dk ab initio data; interaction between surfaces is described by geometry-dependent spin-orbit coupling functions fit to MCSCF/cc-pV(T+d)Z-dk ab initio data. Spectator modes are treated adiabatically via inclusion of curvilinear projected frequencies. The total scattering wave function is expanded in a vibronic basis set and close-coupled equations are solved via R-matrix propagation. Ground state thermal rate constants for forward and reverse reactions agree well with experiment. Multi-surface reaction probabilities, integral cross sections, and initial-state selected branching ratios all highlight the importance of vibrational energy in mediating nonadiabatic transition. Electronically excited state dynamics are seen to play a small but significant role as consistent with experimental conclusions. (C) 2011 American Institute of Physics. [doi:10.1063/1.3592732

    The Matrix Theory S-Matrix

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    The technology required for eikonal scattering amplitude calculations in Matrix theory is developed. Using the entire supersymmetric completion of the v^4/r^7 Matrix theory potential we compute the graviton-graviton scattering amplitude and find agreement with eleven dimensional supergravity at tree level.Comment: 10 pages, RevTeX, no figure

    Quantum Theories of Dilaton Gravity

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    Quantization of two-dimensional dilaton gravity coupled to conformal matter is investigated. Working in conformal gauge about a fixed background metric, the theory may be viewed as a sigma model whose target space is parameterized by the dilaton ϕ\phi and conformal factor ρ\rho. A precise connection is given between the constraint that the theory be independent of the background metric and conformal invariance of the resulting sigma model. Although the action is renormalizable, new coupling constants must be specified at each order in perturbation theory in order to determine the quantum theory. These constants may be viewed as initial data for the beta function equations. It is argued that not all choices of this data correspond to physically sensible theories of gravity, and physically motivated constraints on the data are discussed. In particular a recently constructed subclass of initial data which reduces the full quantum theory to a soluble Liouville-like theory has energies unbounded from below and thus is unphysical. Possibilities for modifying this construction so as to avoid this difficulty are briefly discussed.Comment: 20 pages (Major additions made, including 5 pages on the relation between conformal invariance and background independence.

    Differential gene expression between fall- and spring-run Chinook salmon assessed by long serial analysis of gene expression

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    Author Posting. © American Fisheries Society, 2008. This article is posted here by permission of American Fisheries Society for personal use, not for redistribution. The definitive version was published in Transactions of the American Fisheries Society 137 (2008): 1378–1388, doi:10.1577/T07-222.1.Of all Pacific salmonids, Chinook salmon Oncorhynchus tshawytscha display the greatest variability in return times to freshwater. The molecular mechanisms of these differential return times have not been well described. Current methods, such as long serial analysis of gene expression (LongSAGE) and microarrays, allow gene expression to be analyzed for thousands of genes simultaneously. To investigate whether differential gene expression is observed between fall- and spring-run Chinook salmon from California's Central Valley, LongSAGE libraries were constructed. Three libraries containing between 25,512 and 29,372 sequenced tags (21 base pairs/tag) were generated using messenger RNA from the brains of adult Chinook salmon returning in fall and spring and from one ocean-caught Chinook salmon. Tags were annotated to genes using complementary DNA libraries from Atlantic salmon Salmo salar and rainbow trout O. mykiss. Differentially expressed genes, as estimated by differences in the number of sequence tags, were found in all pairwise comparisons of libraries (freshwater versus saltwater = 40 genes; fall versus spring = 11 genes; and spawning versus nonspawning = 51 genes). The gene for ependymin, an extracellular glycoprotein involved in behavioral plasticity in fish, exhibited the most differential expression among the three groupings. Reverse transcription polymerase chain reaction analysis verified the differential expression of ependymin between the fall- and spring-run samples. These LongSAGE libraries, the first reported for Chinook salmon, provide a window of the transcriptional changes during Chinook salmon return migration to freshwater and spawning and increase the amount of expressed sequence data.This work was supported with a grant from the California Department of Water Resources awarded to M.A.B.; J.C.B. received additional funding from the North Umpqua Foundation, Roseburg, Oregon

    Entropy in Black Hole Pair Production

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    Pair production of Reissner-Nordstrom black holes in a magnetic field can be described by a euclidean instanton. It is shown that the instanton amplitude contains an explicit factor of eA/4e^{A/4}, where AA is the area of the event horizon. This is consistent with the hypothesis that eA/4e^{A/4} measures the number of black hole states.Comment: 24 pages (harvmac l mode

    Supersymmetry and Positive Energy in Classical and Quantum Two-Dimensional Dilaton Gravity

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    An N=1N = 1 supersymmetric version of two dimensional dilaton gravity coupled to matter is considered. It is shown that the linear dilaton vacuum spontaneously breaks half the supersymmetries, leaving broken a linear combination of left and right supersymmetries which squares to time translations. Supersymmetry suggests a spinorial expression for the ADM energy MM, as found by Witten in four-dimensional general relativity. Using this expression it is proven that M{M} is non-negative for smooth initial data asymptotic (in both directions) to the linear dilaton vacuum, provided that the (not necessarily supersymmetric) matter stress tensor obeys the dominant energy condition. A {\it quantum} positive energy theorem is also proven for the semiclassical large-NN equations, despite the indefiniteness of the quantum stress tensor. For black hole spacetimes, it is shown that MM is bounded from below by e2ϕHe^{- 2 \phi_H}, where ϕH\phi_H is the value of the dilaton at the apparent horizon, provided only that the stress tensor is positive outside the apparent horizon. This is the two-dimensional analogue of an unproven conjecture due to Penrose. Finally, supersymmetry is used to prove positive energy theorems for a large class of generalizations of dilaton gravity which arise in consideration of the quantum theory.Comment: 21 page
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