Estudio de Señales de No Telecomunicaciones para la generación de bases de datos que puedan ser implementadas en el sistema GESTA

En el presente trabajo se realizará una base de datos que sustituya a la base de datos de emisores de la que dispone actualmente el REW 31. Ésta se encuentra sin actualizar y en un formato que no es compatible con los sistemas tácticos empleados en la unidad. La nueva base de datos que se realizará, deberá ser compatible con los medios del REW 31, encontrarse lo más actualizada posible con la información de los emisores, y, además, poderse actualizar en cualquier momento por el operador con los nuevos emisores interceptados.<br /

Sialolithiasis: mineralogical composition, crystalline structure, calculus site, and epidemiological features

The purpose of this paper was to describe the characteristics of salivary calculi and their relationship to epidemiological factors, through a cross-sectional study. We analysed 100 calculi obtained in 2017–2021. Patient data including age, time since onset of symptoms, gland involved, and site of location in the salivary system were studied. The calculi were studied to determine their morphological features using scanning electron microscopy and energy dispersive plain radiographic analysis. Most of the calculi had formed in the submandibular gland (SG) (82%). The mean age of patients at onset was 45.83 years; patients presenting parotid gland (PG) stones were somewhat older (p = 0.031). The mean time since the onset of symptoms was longer in PG calculi (p = 0.038). The most common lithiasis site was the main duct (74%), followed by the hilum (22%). Hilar stones were the largest (p < 0.05) and heaviest (p = 0.028). Octacalcium phosphate (OCP) was the most common crystalline phase (Cp) founded, followed by hydroxyapatite (HA) and whitlockite (WH). Specifically, OCP had a higher presence in PG calculi (p = 0.029) and WH was the most common phase in SG calculi (p = 0.017). The most prevalent site of lithiasis was the main duct, and the largest and heaviest calculi were found in the SG. PG stones were associated with a longer history of symptoms and older age. OCP was the most frequent Cp of the calculi studied, and the main Cp in PG stones. WH was the predominant Cp in SG stones. The Cp of the calculi was not influenced by location, patient age, or time of symptoms.Depto. de Mineralogía y PetrologíaFac. de Ciencias GeológicasTRUEpu

Measurement of the cosmic ray spectrum above 4×10184{\times}10^{18} eV using inclined events detected with the Pierre Auger Observatory

A measurement of the cosmic-ray spectrum for energies exceeding $4{\times}10^{18}$ eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\circ}$ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above $5.3{\times}10^{18}$ eV, the "ankle", the flux can be described by a power law $E^{-\gamma}$ with index $\gamma=2.70 \pm 0.02 \,\text{(stat)} \pm 0.1\,\text{(sys)}$ followed by a smooth suppression region. For the energy ($E_\text{s}$) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find $E_\text{s}=(5.12\pm0.25\,\text{(stat)}^{+1.0}_{-1.2}\,\text{(sys)}){\times}10^{19}$ eV.Comment: Replaced with published version. Added journal reference and DO

Energy Estimation of Cosmic Rays with the Engineering Radio Array of the Pierre Auger Observatory

The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared to the data of the surface detector stations of the Observatory, which provide well-calibrated information on the cosmic-ray energies and arrival directions. The response of the radio stations in the 30 to 80 MHz regime has been thoroughly calibrated to enable the reconstruction of the incoming electric field. For the latter, the energy deposit per area is determined from the radio pulses at each observer position and is interpolated using a two-dimensional function that takes into account signal asymmetries due to interference between the geomagnetic and charge-excess emission components. The spatial integral over the signal distribution gives a direct measurement of the energy transferred from the primary cosmic ray into radio emission in the AERA frequency range. We measure 15.8 MeV of radiation energy for a 1 EeV air shower arriving perpendicularly to the geomagnetic field. This radiation energy -- corrected for geometrical effects -- is used as a cosmic-ray energy estimator. Performing an absolute energy calibration against the surface-detector information, we observe that this radio-energy estimator scales quadratically with the cosmic-ray energy as expected for coherent emission. We find an energy resolution of the radio reconstruction of 22% for the data set and 17% for a high-quality subset containing only events with at least five radio stations with signal.Comment: Replaced with published version. Added journal reference and DO

Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy

We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Auger Observatory, we obtain a radiation energy of 15.8 \pm 0.7 (stat) \pm 6.7 (sys) MeV for cosmic rays with an energy of 1 EeV arriving perpendicularly to a geomagnetic field of 0.24 G, scaling quadratically with the cosmic-ray energy. A comparison with predictions from state-of-the-art first-principle calculations shows agreement with our measurement. The radiation energy provides direct access to the calorimetric energy in the electromagnetic cascade of extensive air showers. Comparison with our result thus allows the direct calibration of any cosmic-ray radio detector against the well-established energy scale of the Pierre Auger Observatory.Comment: Replaced with published version. Added journal reference and DOI. Supplemental material in the ancillary file

Multiple Scenario Generation of Subsurface Models:Consistent Integration of Information from Geophysical and Geological Data throuh Combination of Probabilistic Inverse Problem Theory and Geostatistics

Neutrinos with energies above 1017 eV are detectable with the Surface Detector Array of the Pierre Auger Observatory. The identification is efficiently performed for neutrinos of all flavors interacting in the atmosphere at large zenith angles, as well as for Earth-skimming \u3c4 neutrinos with nearly tangential trajectories relative to the Earth. No neutrino candidates were found in 3c 14.7 years of data taken up to 31 August 2018. This leads to restrictive upper bounds on their flux. The 90% C.L. single-flavor limit to the diffuse flux of ultra-high-energy neutrinos with an E\u3bd-2 spectrum in the energy range 1.0 7 1017 eV -2.5 7 1019 eV is E2 dN\u3bd/dE\u3bd &lt; 4.4 7 10-9 GeV cm-2 s-1 sr-1, placing strong constraints on several models of neutrino production at EeV energies and on the properties of the sources of ultra-high-energy cosmic rays

Variación de los Parámetros Cuantitativos del Hemograma Realizado con Anticoagulantes Citrato y Heparina Versus EDTA en Alumnos de la Escuela de Tecnología Médica de la Universidad Andrés Bello Sede Viña del Mar

Tesis (Tecnólogo Médico con especialidad en Bioanálisis Clínico, Inmunohematología y Banco de Sangre)El hemograma constituye un examen básico en hematología y es una fuente de información para muchas áreas de la práctica médica ya que refleja el estado general del paciente, permitiendo la evaluación clínica del mismo. De forma universal y para la realización de este examen, se utilizan muestras de sangre completa anticoaguladas con Ácido etilendiaminotetraacético (EDTA) debido a la conservación de la morfología celular que brinda este anticoagulante. En general, no hay mucha información en términos de variaciones cuantitativas y se presume que éstas son pocas al utilizar un anticoagulante distinto a EDTA, tales como el citrato o la heparina, y cuya presencia en el laboratorio es habitual. Sin embargo, se ha observado que parámetros tales como el recuento plaquetario y el volumen plaquetario medio presentan un pequeño grado de variación entre estos anticoagulantes. Por lo tanto, se pretende evaluar el uso de los anticoagulantes citrato y heparina en la determinación de los parámetros cuantitativos del hemograma comparando estos resultados con los obtenidos con EDTA mediante la utilización de un contador hematológico automatizado y de tal forma, establecer en forma objetiva la variación entre ellos. Esto, con la finalidad de evaluar la posibilidad de realiza·r un hemograma con los anticoagulantes citrato o heparina en una situación en la cual el laboratorio no cuente con una muestra anticoagulada con EDTA, pero sí posea algún tubo con muestra de sangre citratada y/o heparinizada

Inventario del estado actual de los intercambiadores y puentes del sur de Quito e investigación y reparación de uno de ellos

En la actualidad la ciudad de Quito está provista de una gran cantidad de puentes vehiculares (pasos a desnivel), y peatonales, los cuales con el pasar del tiempo se van deteriorando y por ende requieren reparaciones y mantenimiento, o de lo contrario podrían afectar a la seguridad del usuario