32,319 research outputs found

    Generally applicable N-person percentile game theory for case of independently chosen strategies

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    Method for determining outcomes and optimum strategy for all players in discrete N-person game theory with independently chosen strategie

    Robust variables control charts based on sample means

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    In-control probability properties of variables control charts for mean population surveillanc

    Simplified solutions for two-person percentile games

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    Specialized zero-sum game solution using expected values for evaluation of marked set assurance probability in two-person percentile game

    Median two person game theory and examples of its flexibility in applications

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    Probability distribution in two person game theor

    Efficiency of encounter-controlled reaction between diffusing reactants in a finite lattice: topology and boundary effects

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    The role of dimensionality (Euclidean versus fractal), spatial extent, boundary effects and system topology on the efficiency of diffusion-reaction processes involving two simultaneously-diffusing reactants is analyzed. We present numerically-exact values for the mean time to reaction, as gauged by the mean walklength before reactive encounter, obtained via application of the theory of finite Markov processes, and via Monte Carlo simulation. As a general rule, we conclude that for sufficiently large systems, the efficiency of diffusion-reaction processes involving two synchronously diffusing reactants (two-walker case) relative to processes in which one reactant of a pair is anchored at some point in the reaction space (one walker plus trap case) is higher, and is enhanced the lower the dimensionality of the system. This differential efficiency becomes larger with increasing system size and, for periodic systems, its asymptotic value may depend on the parity of the lattice. Imposing confining boundaries on the system enhances the differential efficiency relative to the periodic case, while decreasing the absolute efficiencies of both two-walker and one walker plus trap processes. Analytic arguments are presented to provide a rationale for the results obtained. The insights afforded by the analysis to the design of heterogeneous catalyst systems are also discussed.Comment: 15 pages, 8 figures, uses revtex4, accepted for publication in Physica

    Purist or pragmatist? UK doctoral scientists’ moral positions on the knowledge economy

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    Doctoral scientists increasingly forge non-academic careers after completing the doctorate. Governments and industry in advanced economies welcome this trend, since it complements the ‘knowledge economy’ vision that has come to dominate higher education globally. Knowledge economy stakeholders consider doctoral scientists to constitute particularly high-value human capital; primed to contribute to economic growth via the creation and application of scientific knowledge. Little is known, however, about doctoral scientists’ awareness of, and attitudes towards, the knowledge economy. This paper reports a study of UK doctoral scientists, which reveals that they are aware of, but ideologically divided towards, the knowledge economy. The knowledge economy relates to their scientific motivations, values and aspirations in complex ways. Four moral positions emerge, ranging from ‘anti’ to ‘pro’ knowledge economy. We discuss the characteristics of each moral position, concluding with the need for doctoral scientists to adopt better informed and more flexible professional outlooks

    The 2s atomic level in muonic 208-Pb

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    Relative intensities and energy measurements of 2s level in muonic Pb-20

    Measurement of disruption forces in JET using fiber-optic sensors

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    Monitoring the forces induced on the vacuum vessel when a disruption occurs is essential for the protection of the machine. Since divertor coils have been installed in JET, during disruptions a significant difference between the forces measured on the top and the bottom of the machine has been observed. In order to investigate these further, optical fiber transducers FBGs (Fiber Bragg Gratings) were installed in addition to the currently used strain gauges. During VDE (Vertical Displacement Event) tests, these new transducers were used to measure different level of disruptions ranging from 80T up to 230T vertical forces. The results were then compared with the strain gauges. The FBG measurement was carried out using a broadband light source illuminating an array of 4 FBGs through a combination of directional couplers, connectors and fiber-optic cable. The forces measured both by FBG and by the strain gauges are within the same range, except for the initial swing where large random differences are observed. The tests have demonstrated that the FBG-based force measurement system has adequate resolution (±1.52strain corresponding to a force of 4kN due to the geometry of the leg) and measurement range (50002strain or 13000kN) for this application
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