Large-N mesons

We present an update of our project of computing the meson spectrum and decay constants in large-N QCD. The results are obtained in the quenched approximation with the Wilson fermion action for N = 2, 3, 4, 5, 6, 7 and 17 and extrapolated to infinite N. We non-perturbatively determine the renormalization factors for local quark bilinears that are needed to compute the decay constants. We extrapolate our SU(7) results to the continuum limit, employing four different lattice spacings.Comment: 7 pages, 4 figures, presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, German

The meson spectrum in large-N QCD

We present lattice results on the meson spectrum and decay constants in large-N QCD. The results are obtained in the quenched approximation for N = 2,3,4,5,6,7 and 17 and extrapolated to N = ∞. Xth Quark Confinement and the Hadron Spectrum

G_2 gauge theory at finite temperature

The gauge group being centreless, $G_2$ gauge theory is a good laboratory for studying the role of the centre of the group for colour confinement in Yang-Mills gauge theories. In this paper, we investigate $G_2$ pure gauge theory at finite temperature on the lattice. By studying the finite size scaling of the plaquette, the Polyakov loop and their susceptibilities, we show that a deconfinement phase transition takes place. The analysis of the pseudocritical exponents give strong evidence of the deconfinement transition being first order. Implications of our findings for scenarios of colour confinement are discussed.Comment: 17 pages, 8 figure

Quantifying rate dependence of hysteretic systems

Hysteresis nonlinearities are formally defined as deterministic, rate-independent operators for a great variety of systems. Rate independence frequently occurs in problems in which the time scales of interest are much longer than the intrinsic time scales of the system. In this paper we propose a measure of rate dependence and numerically evaluate the corresponding metric for two rate-dependent systems, namely, a linearly viscous damper and a class of shape memory materials exhibiting thermomechanical behavior [1]. The rate-independent extended Bouc-Wen model of hysteresis [2] is used to validate the robustness of our rate-independence criterion. On the other hand, the shown rate dependence in shape memory materials working in nonisothermal conditions is associated with the ensuing thermomechanical coupling

Vita, virtú, e miracoli della serafica vergine S. Teresa di Giesu

Copia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2012-2013Port. filieteadaSign.: [parágrafo]8 ; A-L8 ; A-B

Apolarity, Hessian and Macaulay polynomials

A result by Macaulay states that an Artinian graded Gorenstein ring R of socle dimension one and socle degree b can be realized as the apolar ring of a homogeneous polynomial f of degree b. If R is the Jacobian ring of a smooth hypersurface g=0, then b is just equal to the degree of the Hessian polynomial of g. In this paper we investigate the relationship between f and the Hessian polynomial of g.Comment: 12 pages. Improved exposition, minor correction

Use of Narbonne vetch grain (Vicia narbonensis) in Charolaise bull feeding: effect on in vitam and post mortem performances and on quality of meat

The addition of Narbonne vetch grain in the diet of 20 Charolaise bulls (420 ± 44 BW), during the finishing period (100 days), was investigated to study the effects on in vitam and post mortem performances and on quality of meat. No significant differences for ADWG ("Vetch" 1.55 kg/d vs. "Control" 1.40 kg/d; P = 0.34), FCR ("Vetch" 7.10 kg/kg vs. "Control" 7.49 kg/kg; P = 0.93) and yield ("Vetch" 60.97% vs. "Control" 62.13%: P = 0.33) were observed. The nutritional and physical characteristics of Longissimus thoracis et lumborum muscle showed no significant differences for Crude Protein ("Vetch" 22.47 vs. "Control" 22.36; P = 0.80), Fat ("Vetch" 2.56 vs "Control" 2.49; P = 0.87), Energy ("Vetch" 1130 vs. "Control" 1119; P = 0.79), TBARs ("Vetch" 0.063 vs. "Control" 0.069; P = 0.72), Luminosity ("Vetch" 46.47 vs. "Control" 43.43; P = 0.11), Hue ("Vetch" 0.6 vs. "Control" 0.6; P = 0.16), Chrome ("Vetch" 27.64 vs. "Control" 25.5; P = 0.56), Cooking loss ("Vetch" 26.77% vs. "Control" 28.62%; P = 0.33) and WBS ("Vetch" 3.4 kg f/cm2 vs. "Control" 3.3 kg f/cm2; P = 0.76). These preliminary results show interest towards the vetch grain as a protein source in the finishing period of bulls

Comparison of ionospheric scintillation models with experimental data for satellite navigation applications

A comparison between two of the most used scintillation models and experimental data is presented. The experimental
 data have been derived from a GPS scintillation monitor developed at Cornell University and placed in Tucuman
 (Argentina), under the peak of the anomaly. The models used (GISM and WBMOD) have been run for the
 geophysical conditions corresponding to the measurements. The comparison is done by subdividing the information
 on the basis of an ionospheric grid of 5°×5° surface square boxes. The comparison has been performed for
 several local times, from 18 LT until 04 LT. Here, only a few cases of particular interest are shown. The goal is to
 understand if the models are able to forecast actual scintillation morphology (from the satellite navigation systems
 point of view) and if they could be used to yield an estimate of scintillation effects on satellite navigation systems

Water extract of Cryphaea heteromalla (Hedw.) D. Mohr bryophyte as a natural powerful source of biologically active compounds

Bryophytes comprise of the mosses, liverworts, and hornworts. Cryphaea heteromalla, (Hedw.) D. Mohr, is a non-vascular lower plant belonging to mosses group. To the date, the most chemically characterized species belong to the liverworts, while only 3.2% and 8.8% of the species belonging to the mosses and hornworts, respectively, have been investigated. In this work, we present Folin–Ciocalteu and oxygen radical absorbance capacity (ORAC) data related to crude extracts of C. heteromalla obtained by three different extraction solvents: pure water (WT), methanol:water (80:20 v/v) (MET), and ethanol:water (80:20 v/v) (ETH). The water extract proved to be the best solvent showing the highest content of biophenols and the highest ORAC value. The C. heteromalla-WT extract was investigated by HPLC-TOF/MS (High Performance Liquid Chromatography-Time of Flight/Mass Spectrometry) allowing for the detection of 14 compounds, five of which were phenolic compounds, derivatives of benzoic, caffeic, and coumaric acids. Moreover, the C. heteromalla WT extract showed a protective effect against reactive oxygen species (ROS) generation induced by tert-butyl hydroperoxide (TBH) on the murine NIH-3T3 fibroblast cell line

L’Equilibrio Vitale del Sistema (EVS). Un modello di analisi del valore nella prospettiva dell’ASV

Il contributo si focalizza sul tema del processo decisionale dell’organo di governo dell’impresa sistema vitale, intendendo per esso quell’insieme di attività che conducono dall’analisi del contesto nel quale l’impresa opera alla formulazione di strategie e di derivati piani e programmi di azione e delle correlate modificazioni evolutive della struttura operativa, con il fine di implementare la capacità di sopravvivenza dell’impresa stessa