Modelo sobre la actitud hacia la colaboraci?n virtual en un entorno laboral

La actitud hacia la colaboraci?n virtual son los sentimientos positivos o negativos de un individuo acerca de la colaboraci?n virtual. Hoy en d?a es importante, para las organizaciones empresariales y el ?mbito acad?mico, entender los factores que influyen en la colaboraci?n de manera virtual. Esta investigaci?n busca comprobar el nivel de influencia de factores sociales e individuales en la actitud hacia la colaboraci?n virtual en el ?mbito laboral. Los constructos que se relacionan son la expectativa de resultados, la expectativa de respaldo del grupo y la experiencia con tecnolog?as colaborativas. El modelo se valid? en base a las respuestas de 505 participantes de empresas de diferentes sectores: tecnolog?a, producci?n industrial, energ?a, consultor?a, telecomunicaciones, construcci?n entre otras. Se realiz? un an?lisis confirmatorio donde los resultados validaron que la actitud hacia la colaboraci?n virtual es influenciada por la expectativa de resultados en colaboraci?n, la expectativa de respaldo del grupo y la experiencia con las tecnolog?as de colaboraci?n

Relaci?n entre la congesti?n vehicular, estr?s y rendimiento laboral individual en empresas industriales de fabricaci?n de envases del Callao

Estudiamos la relaci?n entre la congesti?n vehicular, el estr?s y el rendimiento laboral, la congesti?n vehicular es considerado un importante problema de pol?tica p?blica ya que tiene el potencial de afectar la econom?a y los niveles de productividad de un pa?s. Para determinar las relaciones entre estas variables se?aladas se realiz? un estudio con trabajadores de Molpack del Per? (Molpack) y Peruana de Moldeados (Pamolsa) empresas industriales de fabricaci?n de envases ubicadas en la Provincia Constitucional del Callao. El estudio es de car?cter descriptivo de correlaci?n, as? mismo es considerada cuantitativa de tipo transversal. Se utiliz? como poblaci?n a los 110 trabajadores de Molpack del Per? y se obtuvo una muestra de 278 trabajadores para el caso de Pamolsa. Los resultados obtenidos nos demuestran que existe relaci?n entre las variables congesti?n vehicular, estr?s y rendimiento laboral, no obstante la fuerza de la relaci?n es baja

Carrion Availability in Space and Time

Introduction Availability of carrion to scavengers is a central issue in carrion ecology and management, and is crucial for understanding the evolution of scavenging behaviour. Compared to live animals, their carcasses are relatively unpredictable in space and time in natural conditions, with a few exceptions (see below, especially Sect. “Carrion Exchange at the Terrestrial-Aquatic Interface”). Carrion is also an ephemeral food resource due to the action of a plethora of consumers, from microorganisms to large vertebrates, as well as to desiccation (i.e., loss of water content; DeVault et al. 2003; Beasley et al. 2012; Barton et al. 2013; Moleón et al. 2014). With a focus on vertebrate carcasses, here we give an overview of (a) the causes that produce carrion, (b) the rate of carrion production, (c) the factors affecting carrion quality, and (d) the distribution of carrion in space and time, both in terrestrial and aquatic environments (including their interface). In this chapter, we will focus on naturally produced carrion, whereas non-natural causes of animal mortality are described in chapter “Human-Mediated Carrion: Effects on Ecological Processes”. However, throughout this chapter we also refer to extensive livestock carrion, because in the absence of strong restrictions such as those imposed in the European Community after the bovine spongiform encephalopathy crisis (Donázar et al. 2009; Margalida et al. 2010), the spatiotemporal availability of carrion of extensive livestock and wild ungulates is similar

First measurement of coherent ρ0 photoproduction in ultra-peripheral Xe–Xe collisions at √sNN = 5.44 TeV

The first measurement of the coherent photoproduction of ρ0 vector mesons in ultra-peripheral Xe–Xe collisions at sNN=5.44 TeV is presented. This result, together with previous HERA γp data and γ–Pb measurements from ALICE, describes the atomic number (A) dependence of this process, which is particularly sensitive to nuclear shadowing effects and to the approach to the black-disc limit of QCD at a semi-hard scale. The cross section of the Xe+Xe→ρ0+Xe+Xe process, measured at midrapidity through the decay channel ρ0→π+π−, is found to be dσ/dy=131.5±5.6(stat.)−16.9+17.5(syst.) mb. The ratio of the continuum to resonant contributions for the production of pion pairs is also measured. In addition, the fraction of events accompanied by electromagnetic dissociation of either one or both colliding nuclei is reported. The dependence on A of cross section for the coherent ρ0 photoproduction at a centre-of-mass energy per nucleon of the γA system of WγA,n=65 GeV is found to be consistent with a power-law behaviour σ(γA→ρ0A)∝Aα with a slope α=0.96±0.02(syst.). This slope signals important shadowing effects, but it is still far from the behaviour expected in the black-disc limit.publishedVersio

A(c)(+) Production and Baryon-to-Meson Ratios in pp and p-Pb Collisions at root S-NN=5.02 TeV at the LHC

The prompt production of the charm baryon \u39bc+ and the \u39bc+/D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at sNN=5.02 TeV. These new measurements show a clear decrease of the \u39bc+/D0 ratio with increasing transverse momentum (pT) in both collision systems in the range 2<12 GeV/c, exhibiting similarities with the light-flavor baryon-to-meson ratios p/\u3c0 and \u39b/KS0. At low pT, predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charm-quark fragmentation processes measured in e+e- and e-p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies

A(c)(+) Production and Baryon-to-Meson Ratios in pp and p-Pb Collisions at root S-NN=5.02 TeV at the LHC

The prompt production of the charm baryon Λ_{c}^{+} and the Λ_{c}^{+}/D^{0} production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at sqrt[s_{NN}]=5.02  TeV. These new measurements show a clear decrease of the Λ_{c}^{+}/D^{0} ratio with increasing transverse momentum (p_{T}) in both collision systems in the range 2<p_{T}<12  GeV/c, exhibiting similarities with the light-flavor baryon-to-meson ratios p/π and Λ/K_{S}^{0}. At low p_{T}, predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charm-quark fragmentation processes measured in e^{+}e^{-} and e^{-}p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies