Search results for "AMS"
showing 10 items of 1497 documents
Field rules and bias in random surveys with quota samples : an assessment of CIS surveys
2018
Surveys applying quota sampling in their final step are widely used in opinion and market research all over the world. This is also the case in Spain, where the surveys carried out by CIS (a public institution for sociological research supported by the government) have become a point of reference. The rules used by CIS to select individuals within quotas, however, could be improved as they lead to biases in age distributions. Analysing more than 545,000 responses collected in the 220 monthly barometers conducted between 1997 and 2016 by CIS, we compare the empirical distributions of the barometers with the expected distributions from the sample design and/or target populations. Among other …
Derecho y conciencia en Antígona: Una respuesta atemporal a los conflictos de familia
2018
El presente artículo aborda la importancia de la familia en Antígona, de Sófocles. Ante el Decreto de Creonte, por el que se prohibía, bajo pena de muerte, enterrar y llorar a Polinices, su hermana ?Antígona ? no duda en afirmar que por encima de las leyes del Estado está la ley de los dioses y la ley que dicta su conciencia, la que le exige anteponer los lazos familiares al orden público. Un acto de desobediencia civil que le conducirá a muerte.
Los programas de cumplimiento penal : Aspectos generales
2021
In Spain, as in many other countries, corporate criminal liability has been a reality for years, as well as criminal compliance programs that allow them to be mitigated or exonerated from liability. In this article we will present some of the main keys to consider for the implementation of these mechanisms. This is a series of general considerations that can serve as a guide to understand the complex system of crime prevention provided by the organization and management models in the corporate environment.
Search for a Dark Leptophilic Scalar in e(+) e(-) Collisions
2020
Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, which might be substantially lighter than the weak scale. The experimental constraints on additional scalars with masses in the MeV to GeV range could be significantly weakened if they interact predominantly with leptons rather than quarks. At an e+e- collider, such a leptophilic scalar (φL) would be produced predominantly through radiation from a τ lepton. We report herein a search for e+e-→τ+τ-φL, φL→ℓ+ℓ- (ℓ=e, μ) using data collected by the BABAR experiment at SLAC. No significant signal is observed, and we set limits on the φL coupling to leptons in the range 0.04<mφL<7.0 GeV. These bounds s…
Observation and Measurement of Forward Proton Scattering in Association with Lepton Pairs Produced via the Photon Fusion Mechanism at ATLAS
2020
The observation of forward proton scattering in association with lepton pairs (eþe− þ p or μþμ− þ p) produced via photon fusion is presented. The scattered proton is detected by the ATLAS Forward Proton spectrometer, while the leptons are reconstructed by the central ATLAS detector. Proton-proton collision data recorded in 2017 at a center-of-mass energy of ffiffiffi s p ¼ 13 TeV are analyzed, corresponding to an integrated luminosity of 14.6 fb−1. A total of 57 (123) candidates in the ee þ p (μμ þ p) final state are selected, allowing the background-only hypothesis to be rejected with a significance exceeding 5 standard deviations in each channel. Proton-tagging techniques are introduced f…
Calibration of the photon spectrometer PHOS of the ALICE experiment
2019
Journal of Instrumentation 14(05), P05025 - P05025 (2019). doi:10.1088/1748-0221/14/05/P05025
Measurement of the Lund jet plane using charged particles in 13 TeV proton-proton collisions with the ATLAS detector
2020
The prevalence of hadronic jets at the LHC requires that a deep understanding of jet formation and structure is achieved in order to reach the highest levels of experimental and theoretical precision. There have been many measurements of jet substructure at the LHC and previous colliders, but the targeted observables mix physical effects from various origins. Based on a recent proposal to factorize physical effects, this Letter presents a double-differential cross-section measurement of the Lund jet plane using 139 fb−1 of √s=13 TeV proton-proton collision data collected with the ATLAS detector using jets with transverse momentum above 675 GeV. The measurement uses charged particles to ac…
Search for a Stable Six-Quark State at BABAR
2019
Recent investigations have suggested that the six-quark combination uuddss could be a deeply bound state (S) that has eluded detection so far, and a potential dark matter candidate. We report the first search for a stable, doubly strange six-quark state in Upsilon -> S anti-Lambda anti-Lambda decays based on a sample of 90 million Upsilon(2S) and 110 million Upsilon(3S) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined Upsilon(2S,3S) -> S anti-Lambda anti-Lambda branching fraction in the range (1.2-1.4)x10^-7 are derived for m_S < 2.05 GeV. These bounds set stringent limits on the existence of such exotic particles.
Estudis i investigacions sobre la introducció del valencià a l'ensenyament
2008
L'article dóna a conéixer algunes de les principals conclusions a què arribaren els diferents treballs i que vénen a coincidir amb les idees de Cummins i d'altres autors pel que fa als avantatges dels Programes d'Educació Bilingüe. S'apunten línies a tindre en compte a l'hora d'investigar al voltant del disseny i duta a terme de Programes d'Educació Trilingüe per als centres d'Educació Primària i Secundària. Així mateix es presenta la revisió dels estudis i investigacions, sobre la introducció del valencià a l'ensenyament realitzats a la Comunitat Valenciana, des de la implantació de la Llei d'Ús i Ensenyament del Valencià, fi ns a l'any 2008. També es descriu quina és la situació del nivel…
De la violència escolar a la convivència pacífica: elements clau en la intervenció
2006
En aquest treball, per començar, s'hi defi neix la violència escolar i s'hi indica la seua incidència. A continuació, s'hi analitzen els principals factors escolars que poden afavorir les conductes violentes en el context escolar, i en els quals es pot intervenir per millorar les relacions entre alumnes i el clima de convivència escolar. Finalment, s'hi descriuen breument dos programes d'intervenció psicosocial, els objectius dels quals se centren en la millora de la integració social de l'alumnat i en el desenvolupament de la convivència escolar: el programa Galatea i el programa Conviure