22,020 research outputs found

    Fifth district indexes of manufacturing output

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    Monthly indexes of U.S. manufacturing output are not generally available for individual states or for specific regions of the country. In this article we present new monthly indexes of manufacturing output for the period 1979 through 1987 for the Fifth Federal Reserve District, its individual states, and three of its major industries—textiles, chemicals, and electric equipment.Federal Reserve District, 5th ; Manufactures

    Diversity, Stability, Recursivity, and Rule Generation in Biological System: Intra-inter Dynamics Approach

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    Basic problems for the construction of a scenario for the Life are discussed. To study the problems in terms of dynamical systems theory, a scheme of intra-inter dynamics is presented. It consists of internal dynamics of a unit, interaction among the units, and the dynamics to change the dynamics itself, for example by replication (and death) of units according to their internal states. Applying the dynamics to cell differentiation, isologous diversification theory is proposed. According to it, orbital instability leads to diversified cell behaviors first. At the next stage, several cell types are formed, first triggered by clustering of oscillations, and then as attracting states of internal dynamics stabilized by the cell-to-cell interaction. At the third stage, the differentiation is determined as a recursive state by cell division. At the last stage, hierarchical differentiation proceeds, with the emergence of stochastic rule for the differentiation to sub-groups, where regulation of the probability for the differentiation provides the diversity and stability of cell society. Relevance of the theory to cell biology is discussed.Comment: 19 pages, Int.J. Mod. Phes. B (in press

    Baryonic contributions to the dilepton spectra in relativistic heavy ion collisions

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    We investigate the baryonic contributions to the dilepton yield in high energy heavy ion collisions within the context of a transport model. The relative contribution of the baryonic and mesonic sources are examined. It is observed that most dominant among the baryonic channels is the decay of N*(1520) and mostly confined in the region below the rho peak. In a transport theory implementation we find the baryonic contribution to the lepton pair yield to be small.Comment: 11 pages, 8 figure

    Studying Diquark Structure of Heavy Baryons in Relativistic Heavy Ion Collisions

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    We propose the enhancement of Λc\Lambda_c yield in heavy ion collisions at RHIC and LHC as a novel signal for the existence of diquarks in the strongly coupled quark-gluon plasma produced in these collisions as well as in the Λc\Lambda_c. Assuming that stable bound diquarks can exist in the quark-gluon plasma, we argue that the yield of Λc\Lambda_c would be increased by two-body collisions between udud diquarks and cc quarks, in addition to normal three-body collisions among uu, dd and cc quarks. A quantitative study of this effect based on the coalescence model shows that including the contribution of diquarks to Λc\Lambda_c production indeed leads to a substantial enhancement of the Λc/D\Lambda_c/D ratio in heavy ion collisions.Comment: Prepared for Chiral Symmetry in Hadron and Nuclear Physics (Chiral07), Nov. 13-16, 2007, Osaka, Japa
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