The AD detector array: a new tool for studying diffractive physics at the ALICE experiment

We present a new detector array proposal for the ALICE experiment at LHC. This new subdetector is composed of four stations of scintillator pads and its main goal is to extend our current rapidity coverage. Therefore, we would have more sensitivity to tag the rapidity gaps related to the diffractive processes. In particular, we show a study of the performance of this new subdetector and its impact in our ability to select diffractive events. Certainly, this new system will contribute to improve the ALICE capabilities in addressing several subjects on diffractive physics.Tesi

A note on comonotonicity and positivity of the control components of decoupled quadratic FBSDE

In this small note we are concerned with the solution of Forward-Backward Stochastic Differential Equations (FBSDE) with drivers that grow quadratically in the control component (quadratic growth FBSDE or qgFBSDE). The main theorem is a comparison result that allows comparing componentwise the signs of the control processes of two different qgFBSDE. As a byproduct one obtains conditions that allow establishing the positivity of the control process.Comment: accepted for publicatio

Un “árbol de rúbricas” para evaluar las competencias en la universidad

Se dice que innovar en la universidad no es tarea fácil porque es una institución milenaria, con tradiciones arraigadas, por lo que cualquier cambio resulta especialmente complicado (Zabalza, 2010). Sin embargo, la implantación del Espacio Europeo de Educación Superior (EEES) ha puesto de manifiesto que lo difícil no tiene por qué ser imposible y es patente el esfuerzo común de todas las universidades por mantener el “compromiso común por la calidad, la transparencia y la movilidad” (CRUE, 2020). “La evaluación de los conocimientos y de las competencias adquiridas es el eje sobre el que gira el nuevo proceso de enseñanza-aprendizaje que la implantación del EEES está presentando” (Marín, V. et ál., 2012). En este contexto, todas las iniciativas que se encaminen a este objetivo están colaborando a mejorar ese compromiso en la Universidad.Comunicació

Transverse sphericity of primary charged particles in minimum bias proton–proton collisions at √s = 0.9, 2.76 and 7 TeV

Measurements of the sphericity of primary charged particles in minimum bias proton–proton collisions at s√=0.9, 2.76 and 7 TeV with the ALICE detector at the LHC are presented. The observable is measured in the plane perpendicular to the beam direction using primary charged tracks with p T>0.5 GeV/c in |η|<0.8. The mean sphericity as a function of the charged particle multiplicity at mid-rapidity (N ch) is reported for events with different p T scales (“soft” and “hard”) defined by the transverse momentum of the leading particle. In addition, the mean charged particle transverse momentum versus multiplicity is presented for the different event classes, and the sphericity distributions in bins of multiplicity are presented. The data are compared with calculations of standard Monte Carlo event generators. The transverse sphericity is found to grow with multiplicity at all collision energies, with a steeper rise at low N ch, whereas the event generators show an opposite tendency. The combined study of the sphericity and the mean p T with multiplicity indicates that most of the tested event generators produce events with higher multiplicity by generating more back-to-back jets resulting in decreased sphericity (and isotropy). The PYTHIA6 generator with tune PERUGIA-2011 exhibits a noticeable improvement in describing the data, compared to the other tested generators

Production of He-4 and (4) in Pb-Pb collisions at root(NN)-N-S=2.76 TeV at the LHC

Results on the production of He-4 and (4) nuclei in Pb-Pb collisions at root(NN)-N-S = 2.76 TeV in the rapidity range vertical bar y vertical bar <1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0-10% central events are found to be dN/dy4(He) = (0.8 +/- 0.4 (stat) +/- 0.3 (syst)) x 10(-6) and dN/dy4 = (1.1 +/- 0.4 (stat) +/- 0.2 (syst)) x 10(-6), respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (T-chem = 156 MeV) as for light hadrons. The measured ratio of (4)/He-4 is 1.4 +/- 0.8 (stat) +/- 0.5 (syst). (C) 2018 Published by Elsevier B.V.Peer reviewe

Event-shape engineering for inclusive spectra and elliptic flow in Pb-Pb collisions at root(NN)-N-S=2.76 TeV

Peer reviewe

生産增加と貨幣需要

We report on two-particle charge-dependent cor- relations in pp, p\u2013Pb, and Pb\u2013Pb collisions as a function of the pseudorapidity and azimuthal angle difference, \u3b7 and \u3c6 respectively. These correlations are studied using the balance function that probes the charge creation time and the develop- ment of collectivity in the produced system. The dependence of the balance function on the event multiplicity as well as on the trigger and associated particle transverse momentum ( pT ) in pp, p\u2013Pb, and Pb\u2013Pb collisions at 1asNN = 7, 5.02, and 2.76 TeV, respectively, are presented. In the low transverse momentum region, for 0.2 < pT < 2.0 GeV/c, the balance function becomes narrower in both \u3b7 and \u3c6 directions in all three systems for events with higher multiplicity. The experimental findings favor models that either incorporate some collective behavior (e.g. AMPT) or different mecha- nisms that lead to effects that resemble collective behavior (e.g. PYTHIA8 with color reconnection). For higher values of transverse momenta the balance function becomes even narrower but exhibits no multiplicity dependence, indicating that the observed narrowing with increasing multiplicity at low pT is a feature of bulk particle production

Manual de gestión de mantenimiento del equipo biomédico

El propósito de este manual es proporcionar a los administradores de la tecnología una herramienta de fácil consulta que les oriente en la gestión del mantenimiento de los equipos biomédicos. Se espera que la aplicación de esta metodología contribuya adicionalmente a mejorar el índice de disponibilidad programada de los equipos, ya que este proceso se hace bajo las recomendaciones del fabricante y el cumplimiento de los estándares de seguridad establecidos por las normasGuía para la gestión de mantenimiento orientado al riesgo: Metodología. Órdenes de trabajo (OT). Realizar y mantener actualizado el expediente del equipo médico. Selección de indicadores para la evaluación y el control de la gestión de mantenimiento del equipo médico. Índice de mantenimiento preventivo. Guía para las pruebas de seguridad eléctrica en el entorno del paciente: Entorno del paciente. Infraestructura eléctrica de los sistemas hospitalarios. Compatibilidad electromagnética en ambientes hospitalarios. Entorno del paciente. Infraestructura eléctrica de los sistemas hospitalarios. Caracterización de los niveles de campo electromagnético de alta frecuencia en el ambiente clínico: Procedimiento de los niveles del campo electromagnético de alta frecuencia en el ambiente clínico. Caracterización de los niveles de campo magnético de frecuencia industrial. Recomendaciones para la implementación de un plan de aseguramiento metrológico para dispositivos médicos en entidades prestadoras de servicios de salud. Gestión de los recursos. Función metrológica y mejora continua. El proceso de confirmación metrológica. Preguntas frecuentes. Desarrollo. Procedimiento de verificación metrológic