Eficacia organizacional y calidad de vida laboral : La influencia del sistema de gestión de la calidad

Fil: Ferella, Martín. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina

Journey Metaphors in (Three) Early Greek Philosophers

Dieser Aufsatz untersucht die Verwendung von Reise-Metaphern von drei frühgriechischen Denkern: Heraklit, Parmenides und Empedokles. Meine Untersuchung hebt die ausdruckstarke, leichtplastische und polyvalente Natur dieses Metaphern-Bereiches sowohl in Bezug auf diversen Autoren, als auch in ein und demselben Text hervor. Im Fokus steht der Zusammenhangzwischen Metapher, Imagi­nation und philosophischer Argumentation, besonders wenn ein neuer metaphorischer Stratus in einen schon etablierten Metapher-Bereich eingeführt wird. Schließlich wird auch untersucht, in wie fern ein neuer metaphorischer Stratus, indem dieser neue Kenntnisse und Einsichten strukturiert und organisiert, zum kreativen Denken und zur theoretischen Argumentation beiträgt.This paper analyzes the use of journey metaphors by three early Greek philosophers, Heraclitus, Parmenides, and Empedocles. My investigation emphasizes the powerful, malleable and polyvalent nature of this metaphor cluster both with reference to diverse authors and in the same text. It highlights, moreover, the relationship between metaphor, imagination and philosophical argumentation, above all when a fresh metaphorical stratum is introduced within an already established metaphor. Finally, it investigates to what extent the introduction of a fresh metaphorical stratum contributes to creative thinking and, by structuring and organizing new insights, to theoretical argumentation

A Cognitive Approach to Parmenides’ Two Ways of Enquiry

This paper discusses the notions of sleeping and waking metaphors, activation of metaphoricity and deliberate metaphor use in the poem of Parmenides of Elea. I analyse certain metaphors in Parmenides’ text, which I understand as linguistic realizations of the conceptual metaphor an argument defines a path. I show that these are sleeping metaphors, and that Parmenides woke them up at the outset of his philosophical discourse. By identifying rhetorical devices which indicate Parmenides’ deliberateness when activating sleeping metaphors, I show to what extent and to what goals deliberate metaphors are powerful tools in Parmenides’ philosophical discourse.Dieser Aufsatz befasst sich mit den Konzepten von ‚schlafenden‘ und ‚wachen‘ Metaphern, der Aktivierung von Metaphorizität und bewusstem Metapherngebrauch im philosophischen Lehrgedicht des Parmenides von Elea. Meine Analyse konzentriert sich auf bestimmte Metaphern in Parmenides‘ Text, die als mögliche linguistische Umsetzungen der konzeptuellen Metapher ein argument definiert einen weg (an argument defines a path) zu verstehen sind. Ich zeige, dass solche Metapher als, ‚schlafende Metaphern‘ (sleeping metaphors) zu betrachten sind, die Parmenides am Anfang seiner philosophischen Ausführungen gezielt ‚aufweckt‘. Damit lenkt er die Aufmerksamkeit auf ihre figurativen Leistung. Ich identifiziere rhetorische Elemente, die auf die beabsichtigte ‚Erweckung‘ der Metaphern hinweisen. Schließlich wird untersucht, zu welchem kommunikativen Zweck Parmenides seine Philosophie durch diese Metaphern einführt

Neutrino physics with multi-ton scale liquid xenon detectors

We study the sensitivity of large-scale xenon detectors to low-energy solar neutrinos, to coherent neutrino-nucleus scattering and to neutrinoless double beta decay. As a concrete example, we consider the xenon part of the proposed DARWIN (Dark Matter WIMP Search with Noble Liquids) experiment. We perform detailed Monte Carlo simulations of the expected backgrounds, considering realistic energy resolutions and thresholds in the detector. In a low-energy window of 2-30 keV, where the sensitivity to solar pp and $^7$Be-neutrinos is highest, an integrated pp-neutrino rate of 5900 events can be reached in a fiducial mass of 14 tons of natural xenon, after 5 years of data. The pp-neutrino flux could thus be measured with a statistical uncertainty around 1%, reaching the precision of solar model predictions. These low-energy solar neutrinos will be the limiting background to the dark matter search channel for WIMP-nucleon cross sections below $\sim$2$\times$10$^{-48}$ cm$^2$ and WIMP masses around 50 GeV$\cdot$c$^{-2}$, for an assumed 99.5% rejection of electronic recoils due to elastic neutrino-electron scatters. Nuclear recoils from coherent scattering of solar neutrinos will limit the sensitivity to WIMP masses below $\sim$6 GeV$\cdot$c$^{-2}$ to cross sections above $\sim$4$\times$10$^{-45}$cm$^2$. DARWIN could reach a competitive half-life sensitivity of 5.6$\times$10$^{26}$ y to the neutrinoless double beta decay of $^{136}$Xe after 5 years of data, using 6 tons of natural xenon in the central detector region.Comment: 17 pages, 4 figure

Scintillation efficiency of liquid argon in low energy neutron-argon scattering

Experiments searching for weak interacting massive particles with noble gases such as liquid argon require very low detection thresholds for nuclear recoils. A determination of the scintillation efficiency is crucial to quantify the response of the detector at low energy. We report the results obtained with a small liquid argon cell using a monoenergetic neutron beam produced by a deuterium-deuterium fusion source. The light yield relative to electrons was measured for six argon recoil energies between 11 and 120 keV at zero electric drift field.Comment: 21 pages, 19 figures, 4 table

Background Measurements in the Gran Sasso Underground Laboratory

The gamma background flux below 3000 keV in the Laboratori Nazionali del Gran Sasso (LNGS), Italy, has been measured using a 3" diameter NaI(Tl) detector at different underground positions: In hall A, hall B, the interferometer tunnel, and inside the Large Volume Detector (LVD). The integrated flux is 0.3--0.4 s$^{-1}$cm$^{-2}$ at the first three locations, and is lower by two orders of magnitude inside LVD. With the help of Monte Carlo simulations for every location, the contribution of the individual primordial isotopes to the background has been determined. Using an 11" diameter NaI(Tl) detector, the background neutron flux in the LNGS interferometer tunnel has been estimated. Within the uncertainties, the result agrees with those from other neutron measurements in the main halls.Comment: 6 pages, 6 figures, accepted versio

Spatially uniform calibration of a liquid xenon detector at low energies using 83m-Kr

A difficult task with many particle detectors focusing on interactions below ~100 keV is to perform a calibration in the appropriate energy range that adequately probes all regions of the detector. Because detector response can vary greatly in various locations within the device, a spatially uniform calibration is important. We present a new method for calibration of liquid xenon (LXe) detectors, using the short-lived 83m-Kr. This source has transitions at 9.4 and 32.1 keV, and as a noble gas like Xe, it disperses uniformly in all regions of the detector. Even for low source activities, the existence of the two transitions provides a method of identifying the decays that is free of background. We find that at decreasing energies, the LXe light yield increases, while the amount of electric field quenching is diminished. Additionally, we show that if any long-lived radioactive backgrounds are introduced by this method, they will present less than 67E-6 events/kg/day in the next generation of LXe dark matter direct detection searchesComment: 9 pages, 9 figures. Accepted to Review of Scientific Instrument

A simple high-sensitivity technique for purity analysis of xenon gas

We report on the development and performance of a high-sensitivity purity-analysis technique for gaseous xenon. The gas is sampled at macroscopic pressure from the system of interest using a UHV leak valve. The xenon present in the sample is removed with a liquid-nitrogen cold trap, and the remaining impurities are observed with a standard vacuum mass-spectroscopy device. Using calibrated samples of xenon gas spiked with known levels of impurities, we find that the minimum detectable levels of N2, O2, and methane are 1 ppb, 160 ppt, and 60 ppt respectively. This represents an improvement of about a factor of 10,000 compared to measurements performed without a coldtrap.Comment: 20 pages, 5 figure

Hands on XENON100 Dark Matter (DM) direct detection experiment: studying and modeling background and signal in a frequentist analysis framework

In this activity we try to reproduce the XENON100 direct dark matter search results from 224 live days of data taken between February 2011 and March 2012. The statistical approach to model signal and background in the profile likelihood analysis is presented and the procedure used by the XENON100 collaboration to interpret the results is partially implemented