43,394 research outputs found
A Simple Dynamic Model of Credit and Aggregate Demand
Get PDFThe purpose of the paper is to present a tractable model of an old topic which is becoming more important in macroeconomics: the link between financial structure and economic activity.Aggregate Demand, Fiscal Policy, Monetary Policy, moral hazard, adverse selection, suuply of credit, reserves.
Segmentación temporal de tráfico fractal mediante transformadas wavelet redundantes y teoría de la información
No full textLogarithmic variance profiles and the corresponding f-1 spectra of temperature fluctuations in turbulent Rayleigh-Bénard convection
No full textWe report experimental results for the temperature variance 2(z) and the corresponding frequency spectra P(f) in turbulent Rayleigh-Bénard convection (RBC) in a cylindrical sample of aspect ratioT= D/L = 1:00 (D = 1:12 m is the diameter and L = 1:12 m the height). The measurements were conducted in the Rayleigh-number range 1011 < Ra < 1:35 1014 and Pr ' 0:8. For Ra = 1:35x1014, 2(z) could be described well by a logarithmic dependence on the vertical position z in a range of z 1 < z < z 2 with z 1 ' 70 and z 2 = 0:1L. Here L=(2Nu) is the thickness of a thin thermal sublayer adjacent to the horizontal plate where the heat flux (denoted by the Nusselt number Nu) is carried mostly by thermal diffusion. In the log layer, we found that the temperature spectra had a significant frequency range over which P(f) f with close to 1. As Ra decreased, increased so that the log layer became thinner. At Ra = 2:05 1011, z 2 < z 1 and therefore there was no range for a log layer. Correspondingly, the temperature spectrum near the horizontal plate did not have the f1 scaling form either
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
Get PDFFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Which skills contribute most to absorptive capacity, innovation and productivity performance? Evidence from the US and Western Europe
Get PDFSkills are widely recognised as central to absorptive capacity, that is, firms’ ability to identify and make effective use of knowledge, ideas and technologies that are generated elsewhere. But identification of the specific levels of education and skills that contribute most to the development of absorptive capacity is often hampered by the use of skill measures as proxies for absorptive capacity itself. Drawing on a cross-country industry- level dataset, we retain separate measures of key components of absorptive capacity, namely, skills, R&D investments and openness to foreign trade and investment. We then estimate a system of structural equations in order to evaluate the extent to which different levels of skill contribute to innovative output (measured by growth in patenting) and subsequently to growth in productivity. We find important roles for both high-level skills and upper intermediate (technician-level) skills in converting the knowledge sourcing opportunities provided by openness into innovative output. In final stages of production (making use of innovative output), productivity growth in countries near to the technological frontier is enhanced not just by high-level and upper intermediate skills but also by the skills of the workforce as a whole
Erratum to: Effect of moderate red wine intake on cardiac prognosis after recent acute myocardial infarction of subjects with Type 2 diabetes mellitus (Diabetic Medicine, (2006), 23, 9, (974-981), 10.1111/j.1464-5491.2006.01886.x)
No full textIn an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola.In an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola
Figures 26A-26G. Glaresis bautista, new species. A in Systematic revision of American Glaresidae (Coleoptera: Scarabaeoidea)
No full textFigures 26A-26G. Glaresis bautista, new species. A) Habitus view. B) Clypeus and head surface. C) Pronotal surface. D) Metasternum with metasternal groove and mesotibia. E) Male genitalia. F) Metaleg and trochanter, dorsal view. G) Metaleg and trochanter, ventral view.Published as part of Gordon, Robert D. & Hanley, Guy A., 2014, Systematic revision of American Glaresidae (Coleoptera: Scarabaeoidea), pp. 1-91 in Insecta Mundi 2014 (333) on page 80, DOI: 10.5281/zenodo.464561
CAJA 256 - LEGAJO XVIII - SIGNATURA 13
No full textNota remitida por el Sr. D. Bautista Ríos, comunicando haber recibido los Diplomas y Medallas concedidos al que suscribe y a los Sres. D. José y D. Francisco Viciano, por varios trabajos escultóricos.Ríos, B.; Viciano, F.; Viciano, J. (1892). Nota remitida por el Sr. D. Bautista Ríos, comunicando haber recibido los Diplomas y Medallas concedidos al que suscribe y a los Sres. D. José y D. Francisco Viciano, por varios trabajos escultóricos. Real Sociedad Económica de Amigos del País de Valencia. https://riunet.upv.es/handle/10251/25659Importación Masiv
Assessment of kinetic parameters for the mesophilic anaerobic biodegradation of two-phase olive pomace
No full textA kinetic study of the anaerobic biodegradation of two-phase olive pomace (TPOP) was carried out using a laboratory-scale stirred tank reactor. The reactor was operated at 35°C. The influent contained between 20% and 100% TPOP, representing in terms of total chemical oxygen demand (TCOD) 34.5–187.9 g TCOD l?1. The hydraulic retention times (HRTs) were set between 40.0 and 8.3 d. It was found that the increase of influent substrate concentration favoured the process failure reducing the pH and increasing the ratio of the total volatile fatty acid (TVFA) to alkalinity. This ratio was found to be proportional to the substrate concentration (S), as follows: TVFA/alkalinity=0.04(S). The kinetic model of Andrews was used to describe the relation between anaerobic biodegradation of TCOD and Volatile Solids (VS) and the formation of methane. The values of the kinetic constants for TCOD removal were determined to be 28 g TCOD l?1 d?1, 27 g TCOD l?1 and 352 g TCOD l?1, respectively, for maximum substrate utilization rates (RSmax), saturation constant (KS) and inhibition constant (Ki). Process inhibition started at substrate concentrations of around 20 g TCOD l?1. For VS biodegradation the kinetic constant values, RSmax, KS and Ki, were 45g VS l?1d?1, 37 and 36 g VS l?1, respectively. Inhibition started at VS concentration of around 18 g l?1. The rates of TCOD removal were lower than those observed for VS removal and inhibition of VS removal occurred at a lower concentration compared to that for TCOD. The QM(max), KS and Ki constants for methane production were approximately 3.1 l CH4 l?1 reactor d?1, 8.7 g TCOD l?1 and 272 g TCOD l?1, respectively. Inhibition of methane formation started at a substrate concentration of around 17 g TCOD l?1. TCOD and VS removal rates were higher than the rate of methane formation and these differences increased when the substrate concentration increased. This fact was underlined by the decrease of pH, the increase of TVFA/alkalinity ratio and the reduction of methane production rate
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