Search results for "DEPENDENCE"
showing 10 items of 2462 documents
High-Resolution Nonlinear Raman-Spectroscopy in Gases
1990
0377-0486; The resolution in the Raman spectra of gases has been greatly improved by the development of the different methods of non-linear Raman scattering. When two laser beams, one of which has a tunable frequency, are focused in a sample, a stimulated Raman process occurs as soon as the frequency difference between the two lasers is equal to a Raman-active rovibrational or rotational transition frequency. The Raman resonance can be detected in different ways: by coherent anti-Stokes Raman scattering (CARS) or the corresponding Stokes process (CSRS), by a gain in one of the beams (stimulated Raman gain spectroscopy, SRGS) or a loss in the other (inverse Raman spectroscopy, IRS), or even …
Liquid viscosity and flow rate effects on interfacial area in packed columns
1989
Abstract The influences of liquid kinematic viscosity and liquid flow rate on effective interfacial area for chemical absorption in a Raschig ring packed column were studied by absorbing carbon dioxide into potassium carbonate-bicarbonate-arsenite solutions. The viscosities of the absorbing liquid were varied by the addition of sugar. Analysis of the data shows that an increase in liquid flow rate increases the effective interfacial area over the whole viscosity range considered. The influence of liquid viscosity is more complex as the interfacial area increases with viscosity for low values, while decreasing at higher viscosities. Two correlations have been developed to express this behavi…
The euro impact on trade: long run evidence with structural breaks
2012
In this paper we present new evidence on the euro effect on trade. We use a data set containing all bilateral combinations in a panel of 26 OECD countries during the period 1967-2008. From a methodological point of view, we implement a new generation of tests that allow solving some of the problems derived from the non-stationary nature of the data. To this aim we apply panel tests that account for the presence of cross-section dependence as well as discontinuities in the non-stationary panel data. We test for cointegration between the variables using panel cointegration tests, especially the ones proposed by Banerjee and Carrióni- Silvestre (2010). We also efficiently estimate the long-run…
Leaving highly car-dependent areas
2013
International audience; In France, and particularly in the Paris Region, rising petrol prices and deteriorating economic conditions are impacting on household budgets, especially in suburban areas where travel is highly car-dependent (Dupuy, 1999; Newman and Kenworthy, 1989). However, many low-income households tend to work and live in these areas because of the deconcentration of low-skilled jobs (Berger, 2004; Massot and Roy, 2004) and the structure and supply nature of the housing market. Housing costs in these areas are lower and the supply abundant. However, the large social housing stock in city centres is sometimes seen as unattractive, either because of the nature of certain areas o…
Ara es l’hora? The Approach of the Catalan Political Scene to Independence Issues
2016
The political situation in Catalonia during the last months is changing almost daily. Catalan nationalist movements consistently continue their efforts to create an independent state. As a result, every vote – an unofficial plebiscite, local elections or elections to the Catalan parliament – is treated like a referendum on the matter of independence. The Catalan actions that are ever more faster and further-reaching meet with a growing opposition of the central government, threatening the Catalan authorities with a number of sanctions in case of taking further, concrete steps to break away from Spain. Although, from the outside, the Catalan independence parties seem to be a monolith, the si…
Combination of Tevatron searches for the standard model Higgs boson in the W+W- decay mode.
2010
11 páginas, 4 figuras, 1 tabla.-- CDF Collaboration: et al.
A Precise Measurement of the $\tau$ Polarisation at LEP-1
2000
The $\tau$ polarisation has been studied with the ${\rm e^+e^-}\to \tau^+\tau^-$ data collected by the DELPHI detector at LEP in 1993, 1994 and 1995 around the Z resonance firstly through the exclusive decay channels ${\rm e}\nu\bar{\nu}$ , $\mu\nu\bar{\nu}$ , $\pi\nu$ , $\rho\nu$ and ${\rm a}_1\nu$ and secondly with an inclusive hadronic analysis which benefits from a higher efficiency and a better systematic precision. The results have been combined with those previously published on 1990 to 1992 DELPHI data, to produce results which reflect the full LEP-1 statistics. The fit of the $\tau$ polarisation dependence on the production angle yielded the polarisation parameters ${\cal A}_{_{\sc…
Fluid dynamics with saturated minijet initial conditions in ultrarelativistic heavy-ion collisions
2014
Using next-to-leading order perturbative QCD and a conjecture of saturation to suppress the production of low-energy partons, we calculate the initial energy densities and formation times for the dissipative fluid dynamical evolution of the quark-gluon plasma produced in ultrarelativistic heavy-ion collisions. We identify the framework uncertainties and demonstrate the predictive power of the approach by a good global agreement with the measured centrality dependence of charged particle multiplicities, transverse momentum spectra and elliptic flow simultaneously for the Pb+Pb collisions at the LHC and Au+Au at RHIC. In particular, the shear viscosity in the different phases of QCD matter is…
Measurement of azimuthal hadron asymmetries in semi-inclusive deep inelastic scattering off unpolarised nucleons
2014
Spin-averaged asymmetries in the azimuthal distributions of positive and negative hadrons produced in deep inelastic scattering were measured using the CERN SPS muon beam at $160$ GeV/c and a $^6$LiD target. The amplitudes of the three azimuthal modulations $\cos\phi_h$, $\cos2\phi_h$ and $\sin\phi_h$ were obtained binning the data separately in each of the relevant kinematic variables $x$, $z$ or $p_T^{\,h}$ and binning in a three-dimensional grid of these three variables. The amplitudes of the $\cos \phi_h$ and $\cos 2\phi_h$ modulations show strong kinematic dependencies both for positive and negative hadrons.
Gluon imaging using azimuthal correlations in diffractive scattering at the Electron-Ion Collider
2021
We study coherent diffractive photon and vector meson production in electron-proton and electron-nucleus collisions within the Color Glass Condensate effective field theory. We show that electron-photon and electron-vector meson azimuthal angle correlations are sensitive to non-trivial spatial correlations in the gluon distribution of the target, and perform explicit calculations using spatially dependent McLerran-Venugopalan initial color charge configurations coupled to the numerical solution of small $x$ JIMWLK evolution equations. We compute the cross-section differentially in $Q^2$ and $|t|$ and find sizeable anisotropies in the electron-photon and electron-$\mathrm{J}/��$ azimuthal co…