3,969 research outputs found

    EuroFlow: Resetting leukemia and lymphoma immunophenotyping. Basis for companion diagnostics and personalized medicine

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    This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivative Works 3.0 Unported License.-- Editorial.We are grateful to Dr Jean-Luc Sanne of the European Commission for his support and monitoring of the EuroFlow project.Peer Reviewe

    Equation of motion approach to the Hubbard model in infinite dimensions

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    We consider the Hubbard model on the infinite-dimensional Bethe lattice and construct a systematic series of self-consistent approximations to the one-particle Green's function, G(n)(ω), n=2,3, G^{(n)}(\omega),\ n=2,3,\dots\ . The first n1n-1 equations of motion are exactly fullfilled by G(n)(ω)G^{(n)}(\omega) and the nn'th equation of motion is decoupled following a simple set of decoupling rules. G(2)(ω)G^{(2)}(\omega) corresponds to the Hubbard-III approximation. We present analytic and numerical results for the Mott-Hubbard transition at half filling for n=2,3,4n=2,3,4.Comment: 10pager, REVTEX, 8-figures not available in postscript, manuscript may be understood without figure

    Emergence and correspondence for string theory black holes

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    This is one of a pair of papers that give a historical-\emph{cum}-philosophical analysis of the endeavour to understand black hole entropy as a statistical mechanical entropy obtained by counting string-theoretic microstates. Both papers focus on Andrew Strominger and Cumrun Vafa's ground-breaking 1996 calculation, which analysed the black hole in terms of D-branes. The first paper gives a conceptual analysis of the Strominger-Vafa argument, and of several research efforts that it engendered. In this paper, we assess whether the black hole should be considered as emergent from the D-brane system, particularly in light of the role that duality plays in the argument. We further identify uses of the quantum-to-classical correspondence principle in string theory discussions of black holes, and compare these to the heuristics of earlier efforts in theory construction, in particular those of the old quantum theory

    The Steady Boundary Layer due to a Fast Vortex

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    A point vortex located above and convected parallel to a wall is an important model of the process by which a boundary layer becomes unstable due to external disturbances. Often it has been assumed that the boundary layer due to the passage of the vortex is inherently unsteady. Here we show that for a vortex convected by a uniform shear flow, there is a steady solution when the speed of the vortex cv is sufficiently fast. The existence of the steady solution is demonstrated analytically in the limit of large vortex velocity (cv→∞) and numerically at more moderate speeds. This solution may provide a useful base state about which to investigate the stability of a boundary layer induced by external disturbances

    Dynamic Scaling in One-Dimensional Cluster-Cluster Aggregation

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    We study the dynamic scaling properties of an aggregation model in which particles obey both diffusive and driven ballistic dynamics. The diffusion constant and the velocity of a cluster of size ss follow D(s)sγD(s) \sim s^\gamma and v(s)sδv(s) \sim s^\delta, respectively. We determine the dynamic exponent and the phase diagram for the asymptotic aggregation behavior in one dimension in the presence of mixed dynamics. The asymptotic dynamics is dominated by the process that has the largest dynamic exponent with a crossover that is located at δ=γ1\delta = \gamma - 1. The cluster size distributions scale similarly in all cases but the scaling function depends continuously on γ\gamma and δ\delta. For the purely diffusive case the scaling function has a transition from exponential to algebraic behavior at small argument values as γ\gamma changes sign whereas in the drift dominated case the scaling function decays always exponentially.Comment: 6 pages, 6 figures, RevTeX, submitted to Phys. Rev.

    Change Mining in Adaptive Process Management Systems

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    The wide-spread adoption of process-aware information systems has resulted in a bulk of computerized information about real-world processes. This data can be utilized for process performance analysis as well as for process improvement. In this context process mining offers promising perspectives. So far, existing mining techniques have been applied to operational processes, i.e., knowledge is extracted from execution logs (process discovery), or execution logs are compared with some a-priori process model (conformance checking). However, execution logs only constitute one kind of data gathered during process enactment. In particular, adaptive processes provide additional information about process changes (e.g., ad-hoc changes of single process instances) which can be used to enable organizational learning. In this paper we present an approach for mining change logs in adaptive process management systems. The change process discovered through process mining provides an aggregated overview of all changes that happened so far. This, in turn, can serve as basis for all kinds of process improvement actions, e.g., it may trigger process redesign or better control mechanisms
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