The DØ experiment enjoyed a very successful data-collection run at the Fermilab Tevatron collider between 1992 and 1996. Since then, the detector has been upgraded to take advantage of improvements to the Tevatron and to enhance its physics capabilities. We describe the new elements of the detector, including the silicon microstrip tracker, central fiber tracker, solenoidal magnet, preshower detectors, forward muon detector, and forward proton detector. The uranium/liquid-argon calorimeters and central muon detector, remaining from Run I, are discussed briefly. We also present the associated electronics, triggering, and data acquisition systems, along with the design and implementation of software specific to DØ.

We diagonalize the anti-ferroelectric XXZ-Hamiltonian directly in the thermodynamic limit, where the model becomes invariant under the action of U q sl(2) . Our method is based on the representation theory of quantum affine algebras, the related vertex operators and KZ equation, and thereby bypasses the usual process of starting from a finite lattice, taking the thermodynamic limit and filling the Dirac sea. From recent results on the algebraic structure of the corner transfer matrix of the model, we obtain the vacuum vector of the Hamiltonian. The rest of the eigenvectors are obtained by applying the vertex operators, which act as particle creation operators in the space of eigenvectors.We check the agreement of our results with those obtained using the Bethe Ansatz in a number of cases, and with others obtained in the scaling limitthe su(2)-invariant Thirring model.

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Observation and Properties of the X(3872) Decaying to J/ψ π + π − in pp Collisions at √ s= 1.96 TeV

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A brief introduction is given to the definitions and history of surgical robotics. The capabilities and merits of surgical robots are then contrasted with the related field of computer assisted surgery. A classification is then given of the various types of robot system currently being investigated internationally, together with a number of examples of different applications in both soft-tissue and orthopaedic surgery. The paper finishes with a discussion of the main difficulties facing robotic surgery and a prediction of future progress.

Library of Congress Cataloging-in-Publication Data Davies, B. (Brian), 1937-Integral transforms and tbeir applications/Brian Davies.-3rd ed. p. cm. -(Texts in Applied Mathematics; v. 41) Includes bibliographical references and index.