71 research outputs found
Measurement of the cosmic ray spectrum above eV using inclined events detected with the Pierre Auger Observatory
A measurement of the cosmic-ray spectrum for energies exceeding
eV is presented, which is based on the analysis of showers
with zenith angles greater than 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
eV, the "ankle", the flux can be described by a power law with
index followed by
a smooth suppression region. For the energy () at which the
spectral flux has fallen to one-half of its extrapolated value in the absence
of suppression, we find
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
Latin Americans show wide-spread Converso ancestry and imprint of local Native ancestry on physical appearance
Historical records and genetic analyses indicate that Latin Americans trace their ancestry mainly to the intermixing (admixture) of Native Americans, Europeans and Sub-Saharan Africans. Using novel haplotype-based methods, here we infer sub-continental ancestry in over 6,500 Latin Americans and evaluate the impact of regional ancestry variation on physical appearance. We find that Native American ancestry components in Latin Americans correspond geographically to the present-day genetic structure of Native groups, and that sources of non-Native ancestry, and admixture timings, match documented migratory flows. We also detect South/East Mediterranean ancestry across Latin America, probably stemming mostly from the clandestine colonial migration of Christian converts of non-European origin (Conversos). Furthermore, we find that ancestry related to highland (Central Andean) versus lowland (Mapuche) Natives is associated with variation in facial features, particularly nose morphology, and detect significant differences in allele frequencies between these groups at loci previously associated with nose morphology in this sample.Instituto Multidisciplinario de Biología Celula
Latin Americans show wide-spread Converso ancestry and imprint of local Native ancestry on physical appearance
Historical records and genetic analyses indicate that Latin Americans trace their ancestry mainly to the intermixing (admixture) of Native Americans, Europeans and Sub-Saharan Africans. Using novel haplotype-based methods, here we infer sub-continental ancestry in over 6,500 Latin Americans and evaluate the impact of regional ancestry variation on physical appearance. We find that Native American ancestry components in Latin Americans correspond geographically to the present-day genetic structure of Native groups, and that sources of non-Native ancestry, and admixture timings, match documented migratory flows. We also detect South/East Mediterranean ancestry across Latin America, probably stemming mostly from the clandestine colonial migration of Christian converts of non-European origin (Conversos). Furthermore, we find that ancestry related to highland (Central Andean) versus lowland (Mapuche) Natives is associated with variation in facial features, particularly nose morphology, and detect significant differences in allele frequencies between these groups at loci previously associated with nose morphology in this sample.Instituto Multidisciplinario de Biología Celula
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
Clonal chromosomal mosaicism and loss of chromosome Y in elderly men increase vulnerability for SARS-CoV-2
The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, COVID-19) had an estimated overall case fatality ratio of 1.38% (pre-vaccination), being 53% higher in males and increasing exponentially with age. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, we found 133 cases (1.42%) with detectable clonal mosaicism for chromosome alterations (mCA) and 226 males (5.08%) with acquired loss of chromosome Y (LOY). Individuals with clonal mosaic events (mCA and/or LOY) showed a 54% increase in the risk of COVID-19 lethality. LOY is associated with transcriptomic biomarkers of immune dysfunction, pro-coagulation activity and cardiovascular risk. Interferon-induced genes involved in the initial immune response to SARS-CoV-2 are also down-regulated in LOY. Thus, mCA and LOY underlie at least part of the sex-biased severity and mortality of COVID-19 in aging patients. Given its potential therapeutic and prognostic relevance, evaluation of clonal mosaicism should be implemented as biomarker of COVID-19 severity in elderly people. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, individuals with clonal mosaic events (clonal mosaicism for chromosome alterations and/or loss of chromosome Y) showed an increased risk of COVID-19 lethality
Gestión del conocimiento. Perspectiva multidisciplinaria. Volumen 9
El libro “Gestión del Conocimiento. Perspectiva Multidisciplinaria”, volumen 9, de la Colección Unión Global, es resultado de investigaciones. Los capítulos del libro, son resultados de investigaciones desarrolladas por sus autores. El libro es una publicación internacional, seriada, continua, arbitrada de acceso abierto a todas las áreas del conocimiento, que cuenta con el esfuerzo de investigadores de varios países del mundo, orientada a contribuir con procesos de gestión del conocimiento científico, tecnológico y humanístico que consoliden la transformación del conocimiento en diferentes escenarios, tanto organizacionales como universitarios, para el desarrollo de habilidades cognitivas del quehacer diario. La gestión del conocimiento es un camino para consolidar una plataforma en las empresas públicas o privadas, entidades educativas, organizaciones no gubernamentales, ya sea generando políticas para todas las jerarquías o un modelo de gestión para la administración, donde es fundamental articular el conocimiento, los trabajadores, directivos, el espacio de trabajo, hacia la creación de ambientes propicios para el desarrollo integral de las instituciones
Annual Conference on Formative Research on EFL. Practices thar inspire change.
The conference papers of the Annual Conference on Formative
Research on EFL. Practices thar inspire change collect pedagogical
experiences, research reports, and reflections about social issues,
language teaching, teaching training, interculturality under the
panorama of the Covid-19 pandemic. Each paper invites the reader
to implement changes in their teaching practice through
disruptive pedagogies, reflect on the social and emotional
consequences of the lockdown, new paths for teacher training and
different approaches for teaching interculturality. We expect to
inspire new ways to train pre-service teachers and teach
languages in this changing times
Duelo y atención domiciliaria para pacientes al final de la vida durante la pandemia por COVID-19 en Colombia. Análisis desde la perspectiva de familiares
8 páginasIntroduction End-of-life care is one of the most crucial experiences for both the patient and their loved ones. However, as a result of the changes generated by the COVID-19 pandemic, the dynamics of the end-of-life process has undergone changes at both the family, social and health levels. In turn, this has altered the perception and development of the grief of relatives of patients who died during the pandemic regardless of the cause of death. Then, the aim of this study is to analyze the perceptions and some aspects of bereavement of died patients’ relatives during the pandemic of COVID-19. Methods Through the admission evaluation and follow-up of the relatives with an adapted version of the international Care Of the Dying Evaluation questionnaire. Results Two hundred and thirty-nine relatives were surveyed, of which 112 completed the follow-up questionnaire. Most of the patients died at home and their family members were highly involved in their care. Medical attention was considered adequate and the symptom with the highest perception was pain. A percentage of 87 of those surveyed participated in funeral rites, and 42% rated them as very sober. Regarding grief, the scale of personal growth predominates, however, in the negative aspects, the feeling of pressure in the chest and frequent crying predominates. Conclusions The end of life of home-care patients during the pandemic was perceived as adequate, allowing family support and symptom control. The grieving process shows no complications. The training of health professionals in these fundamental aspects of patient care is important.ntroducción El cuidado al final de la vida es una de las experiencias más cruciales tanto para el paciente como para sus seres queridos. Sin embargo, a raíz de los cambios generados por la pandemia de COVID-19, el proceso de final de vida ha sufrido cambios a nivel familiar, social y sanitario. A su vez, esto ha alterado la percepción y desarrollo del duelo de familiares de pacientes que fallecieron durante la pandemia, independientemente de la causa de muerte. Así, el presente estudio tiene el objetivo de analizar las percepciones y algunos aspectos del proceso de duelo de los familiares de pacientes fallecidos durante la pandemia. Métodos Se aplicó la versión adaptada del cuestionario internacional Care Of the Dying Evaluation a los familiares de personas fallecidas durante la pandemia en 2 momentos diferentes tras la muerte de su familiar. Resultados Se encuestaron 239 familiares, de los cuales 112 realizaron el cuestionario de seguimiento. Los pacientes fallecieron mayoritariamente en su domicilio y su familia estuvo altamente involucrada en su cuidado. La atención médica fue evaluada como adecuada y el síntoma que se percibió con mayor frecuencia fue el dolor. El 87% de los encuestados participaron en ritos fúnebres, y el 42% los calificó como muy sobrios. En cuanto al duelo, predomina la subescala de crecimiento personal, sin embargo, en los aspectos negativos predomina la sensación de presión en el pecho y llanto frecuente. Conclusiones El fin de la vida durante la pandemia de pacientes de atención domiciliaria fue percibido como adecuado, permitiendo el acompañamiento por parte de la familia y el control de los síntomas. El proceso de duelo no evidencia complicaciones. Es importante la formación de los profesionales de la salud en estos aspectos fundamentales de la atención y el cuidado de los pacientes
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