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A measurement of two-particle correlations with a high transverse momentum trigger particle (p(T)(trig) > 2.5 GeV/c) is presented for Au+Au collisions at square root(s(NN)) = 200 GeV over the uniquely broad longitudinal acceptance of the PHOBOS detector (-4 < Delta eta < 2). A broadening of the away-side azimuthal correlation compared to elementary(More)
0. Introduction. Considerable progress has been made in the classification of measure preserving transformations during the last thirteen years, reaching a high point with the recent work of Ornstein [1]. Most of this theory has concentrated on invertible transformations (automorphisms) since it was here that the essential problems awaited solution. Viewed(More)
Introduction. Automorphisms and, more generally, affine transformations of nilmanifolds exhibit many interesting properties. For example, hyperbolic automorphisms serve as basic examples of Anosov diffeomorphisms [6], ergodic automorphisms are Kolmogorov automorphisms [5], and ergodic rotations are examples of transformations with mixed spectrum which do(More)
Introduction. In Section 1 we define continuous maps with unstable centralizers and homeomorphisms with discrete centralizers. Expansive homeomorphisms, which have recently been of interest to several authors, have discrete centralizers. In Section 2 we obtain necessary and sufficient conditions for affine transformations of nilmanifolds to have discrete(More)
In different papers, Reddy [7] and Keynes and Robertson [5, 6] have characterized expansive homeomorphisms of a compact metric space X in terms of a special type of cover of X (called a generator in [5, 6]). The characterization is given as Theorem 1 below. The concept of a generator appears to be very useful and appears to provide considerable unity to the(More)
This Letter presents measurements of the elliptic flow of charged particles as a function of pseudorapidity and centrality from Cu-Cu collisions at 62.4 and 200 GeV using the PHOBOS detector at the Relativistic Heavy Ion Collider. The elliptic flow in Cu-Cu collisions is found to be significant even for the most central events. For comparison with the Au-Au(More)
BACKGROUND Over the past century, abdominal surgery has seen a rapid transition from open procedures to less invasive methods, such as robot-assisted minimally invasive surgery (MIS). This study aimed to investigate and discuss the needs of MIS in terms of instrumentation and to inform the design of a novel instrument. METHODS A survey was conducted among(More)