904,612 research outputs found

    Identification des meilleures pratiques dans l'élaboration des cahiers des charges et des critÚres de sélection en vue du choix d'un ERP dans les entreprises industrielles de Suisse romande

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    L’objectif de ce travail est d’aider les entreprises industrielles de Suisse romande dans leur dĂ©marche d’acquisition d’un ERP (Enterprise Resource Planning en anglais) / PGI (Progiciel de Gestion IntĂ©grĂ© en français). Une enquĂȘte a Ă©tĂ© menĂ©e afin de dĂ©terminer les bonnes pratiques lors de l’élaboration d’un cahier des charges ainsi que du choix des critĂšres de sĂ©lection qui mĂšneront Ă  la sĂ©lection du progiciel de gestion intĂ©grĂ© Ă  implĂ©menter dans l’entreprise. Ainsi, 23 entreprises industrielles ont contribuĂ© Ă  l’enquĂȘte en rĂ©pondant Ă  un questionnaire en ligne. Ce questionnaire avait pour but de relever des donnĂ©es quantitatives et de trouver une tendance dans les diffĂ©rentes maniĂšres de procĂ©der quant aux objectifs citĂ©s ci-dessus. En plus de ces sociĂ©tĂ©s, deux entreprises industrielles, deux Ă©diteurs et deux intĂ©grateurs oeuvrant notamment en Suisse romande ont participĂ© Ă  l’enquĂȘte en rĂ©pondant Ă  des interviews, permettant ainsi d’avoir le point de vue d’un maximum d’acteurs Ă©tant impliquĂ©s dans le processus de sĂ©lection d’un ERP/PGI. De nombreuses bonnes pratiques ont ainsi pu ĂȘtre rĂ©fĂ©rencĂ©es. Celles concernant l’élaboration du cahier des charges ont Ă©tĂ© rĂ©parties en trois catĂ©gories : processus, fonctionnalitĂ©s et appel d’offres. Ainsi, des thĂšmes tels que la composition des Ă©quipes de projets, l’approche Ă  adopter, les modules les plus utilisĂ©s par secteur de l’industrie ou encore les bonnes techniques pour rĂ©aliser un bon appel d’offres sont traitĂ©s. Pour les critĂšres de sĂ©lection, deux visions ont Ă©tĂ© mises en avant : celle des entreprises et celle des Ă©diteurs et/ou intĂ©grateurs. Pour les entreprises, il y est analysĂ© l’importance de diffĂ©rents critĂšres, et quels sont pour elles ceux qui sont dĂ©terminants pour le choix final. À l’opposĂ©, la vision des Ă©diteurs et/ou intĂ©grateurs s’arrĂȘtera sur l’importance des critĂšres en fonction des diffĂ©rents postes dans une sociĂ©tĂ©. Afin que ce travail puisse ĂȘtre utile Ă  diffĂ©rentes entreprises du secteur industriel de Suisse romande, une fiche de bonnes pratiques a Ă©tĂ© Ă©ditĂ©e en parallĂšle de ce travail, synthĂ©tisant les rĂ©sultats de cette enquĂȘte. Elle permettra ainsi d’aider les entreprises dĂ©sirant implĂ©menter un ERP/PGI Ă  aller sur la bonne voie en quelques pages seulement

    Hyperon-nucleon interaction and baryonic contact terms in SU(3) chiral effective field theory

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    In this proceeding we summarize results for baryonic contact terms derived within SU(3) chiral effective field theory. The four-baryon contact terms, necessary for the description of the hyperon-nucleon interaction, include SU(3) symmetric and explicit chiral symmetry breaking terms. They also include four-baryon contact terms involving pseudoscalar mesons, which become important for three-body forces. Furthermore we derive the leading order six-baryon contact terms in the non-relativistic limit and study their contribution to the ΛNN\Lambda NN three-body contact interaction. These results could play an important role in studies of hypernuclei or hyperons in nuclear matter.Comment: contribution to the proceedings of the Seventh International Symposium on Chiral Symmetry in Hadrons and Nuclei, Beijing, October 2013, 4 pages, 2 figures, 1 tabl

    New Physics in b --> s bar(s) s Decay

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    We perform a model-independent analysis of the data on branching ratios and CP asymmetries of B→ϕKB\to\phi K and B→η(â€Č)K(∗)B\to\eta^{(')} K^{(*)} modes. The present data is encouraging to look for indirect evidences of physics beyond the Standard Model. We investigate the parameter spaces for different possible Lorentz structures of the new physics four-Fermi interaction. It is shown that if one takes the data at 1σ1\sigma confidence level, only one particular Lorentz structure is allowed. Possible consequences for the BsB_s system are also discussed.Comment: 9 pages, 3 encapsulated figures, minor changes in the text, conclusions unchanged, a few references added, version to appear in PL

    Exact Results of Strongly Correlated Systems at Finite Temperature

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    Some rigorous conclusions of the Hubbard model, Kondo lattice model and periodic Anderson model at finite temperature are acquired employing the fluctuation-dissipation theorem and particle-hole transform. The main conclusion states that for the three models, the expectation value of S~2−S~z2{\bf \tilde{S}}^2-{\bf \tilde{S}}^2_z will be of order NΛN_{\Lambda} at any finite temperature.Comment: 8 pages, no figures, LATEX, corrected some typos, to appear in Phys. Lett.

    Coexistence of strong nematic and superconducting correlations in a two-dimensional Hubbard model

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    Using a dynamic cluster quantum Monte Carlo approximation, we study a two-dimensional Hubbard model with a small orthorhombic distortion in the nearest neighbor hopping integrals. We find a large nematic response in the low-frequency single-particle scattering rate which develops with decreasing temperature and doping as the pseudogap region is entered. At the same time, the d-wave superconducting gap function develops an s-wave component and its amplitude becomes anisotropic. The strength of the pairing correlations, however, is found to be unaffected by the strong anisotropy, indicating that d-wave superconductivity can coexist with strong nematicity in the system.Comment: 4 pages, 4 figures, published as PRB 84, 220506(R) (2011

    Weak Hyperon Decays: Quark Sea and SU(3) Symmetry Breaking

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    An explanation of the difference in the values of the apparent f/df/d ratios for the S- and P- wave amplitudes of nonleptonic hyperon decays is proposed. The argument is formulated in the framework of the standard pole model with (56,0+)(56,0^{+}) ground-state and (70,1−)(70,1^{-}) excited baryons as intermediate states for the P- and S- waves respectively. Under the assumption that the dominant part of the deviation of (f/d)P−wave(f/d)_{P-wave} from −1-1 is due to large quark sea effects, SU(3)SU(3) symmetry breaking in energy denominators is shown to lead to a prediction for (f/d)S−wave(f/d)_{S-wave} which is in excellent agreement with experiment. This corroborates our previous unitarity calculations which indicated that the matrix elements of the parity conserving weak Hamiltonian between the ground-state baryons are characterized by f0/d0≈−1.6f_{0}/d_{0} \approx -1.6 or more. A brief discussion of the problem of the relative size of S- and P- wave amplitudes is given. Finally, implications for weak radiative hyperon decays are also discussed.Comment: 26 pages, LATEX, 1647/PH IFJ Krako

    Glueballs on S^3

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    For SU(2) gauge theory on the three-sphere we study the dynamics of the low-energy modes. By explicitely integrating out the high-energy modes, the one-loop correction to the hamiltonian for this problem is obtained. After imposing the Ξ\theta-dependence through boundary conditions in configuration space, we obtain the glueball spectrum of the effective theory with a variational method.Comment: 3p Latex. Talk presented at LATTICE96(theoretical developments
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