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
Lâobjectif de ce travail est dâaider les entreprises industrielles de Suisse romande dans leur dĂ©marche dâacquisition dâun 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 lâĂ©laboration dâun 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 lâentreprise. Ainsi, 23 entreprises industrielles ont contribuĂ© Ă lâenquĂȘte 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 lâenquĂȘte en rĂ©pondant Ă des interviews, permettant ainsi dâavoir le point de vue dâun maximum dâacteurs Ă©tant impliquĂ©s dans le processus de sĂ©lection dâun ERP/PGI. De nombreuses bonnes pratiques ont ainsi pu ĂȘtre rĂ©fĂ©rencĂ©es. Celles concernant lâĂ©laboration du cahier des charges ont Ă©tĂ© rĂ©parties en trois catĂ©gories : processus, fonctionnalitĂ©s et appel dâoffres. Ainsi, des thĂšmes tels que la composition des Ă©quipes de projets, lâapproche Ă adopter, les modules les plus utilisĂ©s par secteur de lâindustrie ou encore les bonnes techniques pour rĂ©aliser un bon appel dâoffres 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© lâimportance de diffĂ©rents critĂšres, et quels sont pour elles ceux qui sont dĂ©terminants pour le choix final. Ă lâopposĂ©, la vision des Ă©diteurs et/ou intĂ©grateurs sâarrĂȘtera sur lâimportance 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 dâaider 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
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
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
We perform a model-independent analysis of the data on branching ratios and
CP asymmetries of and 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 confidence level, only one particular
Lorentz structure is allowed. Possible consequences for the 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
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 will be of order 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
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
An explanation of the difference in the values of the apparent 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
ground-state and excited baryons as intermediate
states for the P- and S- waves respectively. Under the assumption that the
dominant part of the deviation of from is due to large
quark sea effects, symmetry breaking in energy denominators is shown to
lead to a prediction for 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 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
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 -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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