212 research outputs found
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Bottom Production
Get PDFWe review the prospects for bottom production physics at the LHC. Members of the working group who has contributed to this document are: J. Baines, S.P. Baranov, P. Bartalini, A. Bay, E. Bouhova, M. Cacciari, A. Caner, Y. Coadou, G. Corti, J. Damet, R. Dell'Orso, J.R.T. De Mello Neto, J.L. Domenech, V. Drollinger, P. Eerola, N. Ellis, B. Epp, S. Frixione, S. Gadomski, I. Gavrilenko, S. Gennai, S. George, V.M. Ghete, L. Guy, Y. Hasegawa, P. Iengo, A. Jacholkowska, R. Jones, A. Kharchilava, E. Kneringer, P. Koppenburg, H. Korsmo, M. Kraemer, N. Labanca, M. Lehto, F. Maltoni, M.L. Mangano, S. Mele, A.M. Nairz, T. Nakada, N. Nikitin, A. Nisati, E. Norrbin, F. Palla, F. Rizatdinova, S. Robins, D. Rousseau, M.A. Sanchis-Lozano, M. Shapiro, P. Sherwood, L. Smirnova, M. Smizanska, A. Starodumov, N. Stepanov, R. Vog
A utilização das informações de custos na gestão da saúde pública: um estudo preliminar em secretarias municipais de saúde do Estado de Santa Catarina
Get PDFDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Sócio-Econômico. Programa de Pós-Graduação em Administração.Este trabalho foi elaborado com o objetivo de avaliar o uso das informações de custos no processo de tomada de decisão, pelos gestores das vinte secretarias municipais da saúde do Estado de Santa Catarina, que mais receberam verbas do Governo Federal durante o ano 2004. Para se alcançar este objetivo foi realizada uma avaliação do perfil dos gestores entrevistados no sentido de verificar se os mesmos tinham tempo de experiência e escolaridade necessários para produzir informações fidedignas quanto às questões realizadas; foi verificada a existência ou não de sistemas de custos implantados nestas secretarias; foi realizada uma avaliação da percepção destes gestores sobre a utilização das informações de custos no processo de tomada de decisão e foram identificadas quais informações de custos, são utilizadas atualmente no processo de tomada de decisão. A pesquisa foi realizada utilizando-se a técnica de entrevista guiada onde os entrevistados foram pessoas ocupantes de cargos administrativos nas secretarias municipais da saúde pesquisadas. Os objetivos foram alcançados uma vez que se conseguiu avaliar o uso das informações de custos na gestão de 18 (dezoito) secretarias municipais da saúde do Estado de Santa Catarina. Os resultados indicam que apesar de existir uma exigência legal quanto à implantação de sistemas de custos em órgãos públicos, apenas 02 (duas) secretarias municipais da saúde possuem este processo um pouco mais avançado, nas demais, o que se pode verificar é que existem algumas tentativas de se obter informações mais detalhadas sobre custos. Entretanto, na opinião dos entrevistados, as informações de custos são bastante importantes na gestão destas secretarias
Chaos In Periodically Perturbed Monopole + Quadrupole-like Potentials
No full textThe motion of a particle subjected to simple inner (outer) periodic perturbations when it evolves around a center of attraction modeled by an inverse square law plus a quadrupole-like term is studied. The equations of motion are used to reduce the Melnikov method to the study of simple graphics. © 1998 Elsevier Science B.V.2421-2712Poincaré, H., (1892) Les Methodes Nouvelles de la Méchanique Celeste, , Gauthier-Villars, ParisBai-Lin, H., (1982) Chaos, , World Scientific, SingaporeArnold, V.I., Dynamical systems (1988) Encyclopaedia of Mathematical Sciences, 3. , Springer, BerlinMelnikov, V.K., (1963) Trans. Moscow Math. Soc., 12, p. 1Holmes, P.J., Marsden, J.E., (1982) J. Math. Phys., 23, p. 669(1982) Comm. Math. Phys., 82, p. 523Holmes, P., (1990) Phys. Rep., 193, p. 137Holmes, P.J., Marsden, J.E., (1983) Indiana U. Math. J., 32, p. 273Gerhard, O.E., (1985) Astron. Astrophys., 151, p. 279Gerhard, O.E., (1986) Mon. Not. R. Astr. Soc, 222, p. 287Koiller, J., De Mello Neto, J.R.T., Soares, I.D., (1985) Phys. Lett. A, 110, p. 260Bombelli, L., Calzetta, E., (1992) Class. Quant. Grav., 9, p. 2573Letelier, P.S., Vieira, W.M., (1997) Class. Quant. Grav., 14, p. 1249Moeckel, R., (1992) Comm. Math. Phys., 150, p. 415Straumann, N., (1984) General Relativity and Relativistic Astrophysics, , Springer, BerlinVieira, W.M., Letelier, P.S., (1996) Phys. Rev. Lett., 76, p. 1409Churchill, R.C., Rod, D.L., (1980) J. Diff. Eq., 37, p. 2
Constraints on Light Dark Matter Particles Interacting with Electrons from DAMIC at SNOLAB
No full textInternational audienceWe report direct-detection constraints on light dark matter particles interacting with electrons. The results are based on a method that exploits the extremely low levels of leakage current of the DAMIC detector at SNOLAB of 2–6×10-22 A cm−2. We evaluate the charge distribution of pixels that collect <10e- for contributions beyond the leakage current that may be attributed to dark matter interactions. Constraints are placed on so-far unexplored parameter space for dark matter masses between 0.6 and 100 MeV c-2. We also present new constraints on hidden-photon dark matter with masses in the range 1.2–30 eV c-2
First results from the microwave air yield beam experiment (MAYBE): Measurement of GHz radiation for ultra-high energy cosmic ray detection
No full textWe present measurements of microwave emission from an electron-beam induced air plasma performed at the 3 MeV electron Van de Graaff facility of the Argonne National Laboratory. Results include the emission spectrum between 1 and 15 GHz, the polarization of the microwave radiation and the scaling of the emitted power with respect to beam intensity. MAYBE measurements provide further insight on microwave emission from extensive air showers as a novel detection technique for Ultra-High Energy Cosmic Rays
First results from the microwave air yield beam experiment (MAYBE): Measurement of GHz radiation for ultra-high energy cosmic ray detection
No full textWe present measurements of microwave emission from an electron-beam induced air plasma performed at the 3 MeV electron Van de Graaff facility of the Argonne National Laboratory. Results include the emission spectrum between 1 and 15 GHz, the polarization of the microwave radiation and the scaling of the emitted power with respect to beam intensity. MAYBE measurements provide further insight on microwave emission from extensive air showers as a novel detection technique for Ultra-High Energy Cosmic Rays
Search for low-mass WIMPs in a 0.6 kg day exposure of the DAMIC experiment at SNOLAB
Get PDFInternational audienceWe present results of a dark matter search performed with a 0.6 kg d exposure of the DAMIC experiment at the SNOLAB underground laboratory. We measure the energy spectrum of ionization events in the bulk silicon of charge-coupled devices down to a signal of 60 eV electron equivalent. The data are consistent with radiogenic backgrounds, and constraints on the spin-independent WIMP-nucleon elastic-scattering cross section are accordingly placed. A region of parameter space relevant to the potential signal from the CDMS-II Si experiment is excluded using the same target for the first time. This result obtained with a limited exposure demonstrates the potential to explore the low-mass WIMP region (<10 GeV c-2) with the upcoming DAMIC100, a 100 g detector currently being installed in SNOLAB
Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum
Get PDFWe report a first measurement for ultrahigh energy cosmic rays of the correlation between the depth of shower maximum and the signal in the water Cherenkov stations of air-showers registered simultaneously by the fluorescence and the surface detectors of the Pierre Auger Observatory. Such a correlation measurement is a unique feature of a hybrid air-shower observatory with sensitivity to both the electromagnetic and muonic components. It allows an accurate determination of the spread of primary masses in the cosmic-ray flux. Up till now, constraints on the spread of primary masses have been dominated by systematic uncertainties. The present correlation measurement is not affected by systematics in the measurement of the depth of shower maximum or the signal in the water Cherenkov stations. The analysis relies on general characteristics of air showers and is thus robust also with respect to uncertainties in hadronic event generators. The observed correlation in the energy range around the ‘ankle’ at lg(E/eV)=18.5–19.0lg(E/eV)=18.5–19.0 differs significantly from expectations for pure primary cosmic-ray compositions. A light composition made up of proton and helium only is equally inconsistent with observations. The data are explained well by a mixed composition including nuclei with mass A>4A>4. Scenarios such as the proton dip model, with almost pure compositions, are thus disfavored as the sole explanation of the ultrahigh-energy cosmic-ray flux at Earth
First Direct-Detection Constraints on eV-Scale Hidden-Photon Dark Matter with DAMIC at SNOLAB
Get PDFInternational audienceWe present direct detection constraints on the absorption of hidden-photon dark matter with particle masses in the range 1.2–30 eV c-2 with the DAMIC experiment at SNOLAB. Under the assumption that the local dark matter is entirely constituted of hidden photons, the sensitivity to the kinetic mixing parameter κ is competitive with constraints from solar emission, reaching a minimum value of 2.2×10-14 at 17 eV c-2. These results are the most stringent direct detection constraints on hidden-photon dark matter in the galactic halo with masses 3–12 eV c-2 and the first demonstration of direct experimental sensitivity to ionization signals <12 eV from dark matter interactions
Erratum: Search for photons with energies above 1018 eV using the hybrid detector of the Pierre Auger Observatory (Journal of Cosmology and Astroparticle Physics (2017) 4 (9) DOI: 10.1088/1475-7516/2017/04/009)
No full text1 Exposure calculation Due to a mistake in the numerical integration following eq. (6.2) of the original article [1], the exposure shown in figure 5 of the original article was incorrect. The correct exposure is shown in figure 1. 2 Upper limits on the integral photon flux and fraction The incorrect exposure affects the calculation of the upper limits on the integral photon flux following eq. (6.1) of the original article. The correct values for the upper limits are 0.038, 0.010, 0.009, 0.008 and 0.007 km−2 sr−1 yr−1 for threshold energies of 1, 2, 3, 5 and 10 EeV. The correct values for the upper limits on the integral photon fraction subsequently derived are 0.14 %, 0.17 %, 0.42 %, 0.86 % and 2.9 % for the same threshold energies. 3 Author list The author list of this erratum also corrects a mistake made in the original article, where F. Zuccarello was missing and Z. Zong was listed twice
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