548 research outputs found

    Análisis de la experiencia del usuario en la plataforma web para la compra de calzado deportivo en Runa Store

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    La presente investigación tiene como objetivo evaluar la experiencia del usuario en la plataforma web de comercio electrónico de la marca Runa Store a partir del modelo explicativo de experiencia de compra web de López (2015), modelo centrado específicamente en el sector de moda. Runa Store, sujeto de estudio, presenta un bajo nivel de ventas a través de su plataforma web, lo cual representa un problema para la organización y, de esta forma, resulta importante el análisis de la plataforma para generar información relevante sobre la situación actual. Así, prioriza acciones de marketing enfocadas en mejorar su imagen; entre ellas, las remodelaciones de las tiendas físicas y la creación de su página web. Sin embargo, en esta última no se obtuvieron los resultados esperados y la hipótesis de los investigadores es que se explique por la falta de incorporar criterios de experiencia de compra de usuario. Así, existe un relevante sustento teórico que argumenta que la experiencia que el usuario recibe influye en la decisión de compra de un producto y/o servicio a través de la web. Más aún, existen distintas variables de la experiencia web que permiten su evaluación como el modelo propuesto por López de experiencia de compra online de moda. Previo al análisis, se realizó una recolección de datos a través de un conjunto de entrevistas a personas claves de la organización sobre la gestión del canal online de la marca para el mejor conocimiento de los esfuerzos realizados en dicha plataforma. Luego, se realizaron encuestas estructuradas a clientes potenciales de Runa Store para conocer y analizar la experiencia recibida en la página web. Por último, se llevaron a cabo entrevistas a expertos en herramientas y análisis cuantitativo con el fin de obtener su punto de vista sobre cómo abordar la evaluación del problema encontrado y recibir retroalimentación sobre el análisis realizado bajo las ecuaciones estructurales con el modelo elegido. Dicho modelo de López propone que determinadas características de la página web producen, a través de ciertos mediadores, respuestas en los usuarios en torno a la experiencia que reciben. Así, como aporte a la literatura y futuras investigaciones, se encontró como resultado del análisis la aplicabilidad del modelo mediante la experiencia evaluada en el usuario durante la compra de calzado deportivo en la empresa, provocando como consecuencia las variables satisfacción y lealtad. Sin embargo, también se demostró la no relación de la variable “demostrabilidad” hacia “control percibido”, “atención al cliente” hacia “control percibido”, “estética general” hacia “nivel de implicación afectiva”, “calidad” hacia “nivel de implicación afectiva” y “nivel de implicación afectiva” hacia “satisfacción”.Tesi

    First results from the AugerPrime Radio Detector

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    Update of the Offline Framework for AugerPrime

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    A search for ultra-high-energy photons at the Pierre Auger Observatory exploiting air-shower universality

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    The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼0.2 EeV. It measures extensive air showers using a hybrid technique that combines a fluorescence detector (FD) with a ground array of particle detectors (SD). The signatures of a photon-induced air shower are a larger atmospheric depth at the shower maximum (Xmax_{max}) and a steeper lateral distribution function, along with a lower number of muons with respect to the bulk of hadron-induced background. Using observables measured by the FD and SD, three photon searches in different energy bands are performed. In particular, between threshold energies of 1-10 EeV, a new analysis technique has been developed by combining the FD-based measurement of Xmax_{max} with the SD signal through a parameter related to its muon content, derived from the universality of the air showers. This technique has led to a better photon/hadron separation and, consequently, to a higher search sensitivity, resulting in a tighter upper limit than before. The outcome of this new analysis is presented here, along with previous results in the energy ranges below 1 EeV and above 10 EeV. From the data collected by the Pierre Auger Observatory in about 15 years of operation, the most stringent constraints on the fraction of photons in the cosmic flux are set over almost three decades in energy

    Study on multi-ELVES in the Pierre Auger Observatory

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    Since 2013, the four sites of the Fluorescence Detector (FD) of the Pierre Auger Observatory record ELVES with a dedicated trigger. These UV light emissions are correlated to distant lightning strikes. The length of recorded traces has been increased from 100 μs (2013), to 300 μs (2014-16), to 900 μs (2017-present), to progressively extend the observation of the light emission towards the vertical of the causative lightning and beyond. A large fraction of the observed events shows double ELVES within the time window, and, in some cases, even more complex structures are observed. The nature of the multi-ELVES is not completely understood but may be related to the different types of lightning in which they are originated. For example, it is known that Narrow Bipolar Events can produce double ELVES, and Energetic In-cloud Pulses, occurring between the main negative and upper positive charge layer of clouds, can induce double and even quadruple ELVES in the ionosphere. This report shows the seasonal and daily dependence of the time gap, amplitude ratio, and correlation between the pulse widths of the peaks in a sample of 1000+ multi-ELVES events recorded during the period 2014-20. The events have been compared with data from other satellite and ground-based sensing devices to study the correlation of their properties with lightning observables such as altitude and polarity

    Outreach activities at the Pierre Auger Observatory

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    The ultra-high-energy cosmic-ray sky above 32 EeV viewed from the Pierre Auger Observatory

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    Extraction of the Muon Signals Recorded with the Surface Detector of the Pierre Auger Observatory Using Recurrent Neural Networks

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    We present a method based on the use of Recurrent Neural Networks to extract the muon component from the time traces registered with water-Cherenkov detector (WCD) stations of the Surface Detector of the Pierre Auger Observatory. The design of the WCDs does not allow to separate the contribution of muons to the time traces obtained from the WCDs from those of photons, electrons and positrons for all events. Separating the muon and electromagnetic components is crucial for the determination of the nature of the primary cosmic rays and properties of the hadronic interactions at ultra-high energies. We trained a neural network to extract the muon and the electromagnetic components from the WCD traces using a large set of simulated air showers, with around 450 000 simulated events. For training and evaluating the performance of the neural network, simulated events with energies between 1018.5, eV and 1020 eV and zenith angles below 60 degrees were used. We also study the performance of this method on experimental data of the Pierre Auger Observatory and show that our predicted muon lateral distributions agree with the parameterizations obtained by the AGASA collaboration

    Event-by-event reconstruction of the shower maximum XmaxX_{\mathrm{max}} with the Surface Detector of the Pierre Auger Observatory using deep learning

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    Reconstruction of Events Recorded with the Water-Cherenkov and Scintillator Surface Detectors of the Pierre Auger Observatory

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