2,243 research outputs found

    Transport Coefficients of Gluon Plasma

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    Transport coefficients of gluon plasma are calculated for a SU(3) pure gauge model by lattice QCD simulations on 163×816^3 \times 8 and 243×824^3 \times 8 lattices. Simulations are carried out at a slightly above the deconfinement transition temperature TcT_c, where a new state of matter is currently being pursued in RHIC experiments. Our results show that the ratio of the shear viscosity to the entropy is less than one and the bulk viscosity is consistent with zero in the region, 1.4T/Tc1.81.4 \leq T/T_c \leq 1.8 .Comment: 10 pages, Late

    Optimality Theory as a Framework for Lexical Acquisition

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    This paper re-investigates a lexical acquisition system initially developed for French.We show that, interestingly, the architecture of the system reproduces and implements the main components of Optimality Theory. However, we formulate the hypothesis that some of its limitations are mainly due to a poor representation of the constraints used. Finally, we show how a better representation of the constraints used would yield better results
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