Neutrino interaction classification with a convolutional neural network in the DUNE far detector

Documento escrito por un elevado número de autores/as, solo se referencia el/la que aparece en primer lugar y los/as autores/as pertenecientes a la UC3M.The Deep Underground Neutrino Experiment is a next-generation neutrino oscillation experiment that aims to measure CP-violation in the neutrino sector as part of a wider physics program. A deep learning approach based on a convolutional neural network has been developed to provide highly efficient and pure selections of electron neutrino and muon neutrino charged-current interactions. The electron neutrino (antineutrino) selection efficiency peaks at 90% (94%) and exceeds 85% (90%) for reconstructed neutrino energies between 2-5 GeV. The muon neutrino (antineutrino) event selection is found to have a maximum efficiency of 96% (97%) and exceeds 90% (95%) efficiency for reconstructed neutrino energies above 2 GeV. When considering all electron neutrino and antineutrino interactions as signal, a selection purity of 90% is achieved. These event selections are critical to maximize the sensitivity of the experiment to CP-violating effects.This document was prepared by the DUNE Collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. This work was supported by CNPq, FAPERJ, FAPEG and FAPESP, Brazil; CFI, Institute of Particle Physics and NSERC, Canada; CERN; MŠMT, Czech Republic; ERDF, H2020-EU and MSCA, European Union; CNRS/IN2P3 and CEA, France; INFN, Italy; FCT, Portugal; NRF, South Korea; Comunidad de Madrid, Fundación "La Caixa" and MICINN, Spain; State Secretariat for Education, Research and Innovation and SNSF, Switzerland; TÜBITAK, Turkey; The Royal Society and UKRI/STFC, United Kingdom; DOE and NSF, United States of America

El sentimiento arrugado

Libro reseñado: Acordeones, cumbiamba y vallenato en el Magdalena Grande: una historia cultural, económica y política, 1870- 1960. Joaquín Viloria De la Hoz. Editorial Unimagdalena, Santa Marta, 2018, 130 pp., il

El sentimiento arrugado

Libro reseñado: Acordeones, cumbiamba y vallenato en el Magdalena Grande: una historia cultural, económica y política, 1870- 1960. Joaquín Viloria De la Hoz. Editorial Unimagdalena, Santa Marta, 2018, 130 pp., il

Nematic Films and Radially Anisotropic Delaunay Surfaces

We develop a theory of axisymmetric surfaces minimizing a combination of surface tension and nematic elastic energies which may be suitable for describing simple film and bubble shapes. As a function of the elastic constant and the applied tension on the bubbles, we find the analogues of the unduloid, sphere, and nodoid in addition to other new surfaces.Comment: 15 pages, 18 figure

Nonlinear characteristics identification of an impact oscillator with a one-sided elastic constraint

This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record Data availability: Data will be made available on request.Impacting systems are widely used in many engineering applications, such as self-propelled robots, energy harvesting and percussive drilling, which exhibit rich and complex nonlinear phenomena. Among these applications, predicting nonlinearities and estimating system parameters are of great interest of nonlinear dynamics research community. Backbone curve is an analytical tool that captures the frequencyamplitude dependence of nonlinear systems. In this paper, we estimate the impacting stiffness of a single-degree-of-freedom non-smooth dynamical system qualitatively by using the backbone curve. It was found that an increase of the impacting stiffness may lead to lowering the backbone curve. An adaptive differential evolution algorithm with the Metropolis criterion is proposed to identify the parameters of the impacting system quantitatively using experimental data, which are consistent with our theoretical predictions. Finally, the identified parameters are verified, and the limitations of the backbone curve are drawn. The nonlinear characteristics identification method studied in this paper could be extended to other vibro-impact systems and is potentially applicable to structural health monitoring and robotic sensing.European Union’s Horizon 202

ZOONOSIS TRANSMITIDAS POR ANIMALES SILVESTRES Y SU IMPACTO EN LAS ENFERMEDADES EMERGENTES Y REEMERGENTES

Las enfermedades emergentes y reemergentes originadas desde animales de vida silvestre, pueden ser transmitidas a las poblaciones humanas por contacto directo o por vectores. Las zoonosis determinan una gran problemática social epidemiológica. La relación que tiene las enfermedades emergentes y reemergentes está ligada a la pérdida de la biodiversidad por factores antropogénicos, debido a la destrucción de hábitats naturales, el tráfico de fauna y a la pérdida de diversidad genética. Todos estos aspectos juegan un papel en la aparición de las patologías de origen infeccioso. Esta revisión intenta acercarse al conocimiento de las zoonosis transmitidas por animales silvestres y su impacto en las enfermedades emergentes y reemergentes

CONTRIBUCIÓN AL REGISTRO HISTÓRICO DE ACTIVIDAD DE LOS VOLCANES CHILES Y CERRO NEGRO (FRONTERA COLOMBO-ECUATORIANA)

La recopilación documental de información histórica sobre la actividad de los volcanes Chiles (0°49’ N y 77°56’ W, 4.748 m.s.n.m.) y Cerro Negro (0°46’ N y 77° 57’ W, 4.470 m.s.n.m.), en la frontera colombo-ecuatoriana, permite interpretar que estos volcanes han presentado signos de actividad eruptiva menor, posiblemente desde épocas prehispánicas, ya que a inicios de la época de la colonia el Chiles era reconocido como volcán, a pesar de encontrarse en un ámbito geográfico aislado. Hacia la segunda mitad del siglo XIX, el volcán Chiles presentó una actividad fumarólica intensa, la cual pudo estar asociada a eventos eruptivos menores, ocurridos posiblemente entre 1860 y 1869, focalizados en el flanco sur del volcán; en este mismo período se reportan manifestaciones hidrotermales y fumarólicas incipientes al interior del anfiteatro del volcán Cerro Negro y posible actividad eruptiva hacia comienzos del siglo XX, mientras que la actividad fumarólica en Chiles para entonces había desaparecido. Entre 1923 y 1924, se registró una sismicidad significativa (incluyendo un evento de profundidad superficial y magnitud 6 en la escala de Richter) que en su momento fue asociada a erupciones del volcán Chiles. La falta de datos más precisos sobre la actividad eruptiva de estos volcanes se debe posiblemente a la escasa población en la zona que pudiera hacer reportes sobre dicha actividad, a que correspondiera a eventos eruptivos menores y al hecho de considerarse, algunas veces, a los dos centros volcánicos como un solo volcán.  Documentary collection of historical information about the activity of the Chiles (0°49’N and 77°56’W)and Cerro Negro volcanoes (0°46’N and 77°57’W), on the Colombian-Ecuadorian border allows us to interpret that Chiles was active in pre-Hispanic times, since during colonial times it was already recognized as a volcano. By the middle of XIX century, Chiles volcano presented an intense fumarolicactivity possibly related to minor eruptive events that could have occurred between 1860 and 1869, which were focused towards the southern sector of the volcano. Hydrothermal and incipient fumarole activity into the amphitheater of Cerro Negro volcano is reported by 1870, and eruptive activity at the beginning of XX century, while the fumarolic activity in Chiles had disappeared. Later, between 1923 and 1924, a significant seismicity was recorded (including an event of shallow depth and magnitude 6 on the Richter scale) which, in turn, was associated with Chiles volcano eruptive activity. The lack of more precise data on the eruptive activity of these volcanoes is possibly due to the minor eruptive activity, to the sparse population in the area and to the notion that the two volcanoes were considered as one. &nbsp

CONTRIBUCIÓN AL REGISTRO HISTÓRICO DE ACTIVIDAD DE LOS VOLCANES CHILES Y CERRO NEGRO (FRONTERA COLOMBO-ECUATORIANA)

La recopilación documental de información histórica sobre la actividad de los volcanes Chiles (0°49’ N y 77°56’ W, 4.748 m.s.n.m.) y Cerro Negro (0°46’ N y 77° 57’ W, 4.470 m.s.n.m.), en la frontera colombo-ecuatoriana, permite interpretar que estos volcanes han presentado signos de actividad eruptiva menor, posiblemente desde épocas prehispánicas, ya que a inicios de la época de la colonia el Chiles era reconocido como volcán, a pesar de encontrarse en un ámbito geográfico aislado. Hacia la segunda mitad del siglo XIX, el volcán Chiles presentó una actividad fumarólica intensa, la cual pudo estar asociada a eventos eruptivos menores, ocurridos posiblemente entre 1860 y 1869, focalizados en el flanco sur del volcán; en este mismo período se reportan manifestaciones hidrotermales y fumarólicas incipientes al interior del anfiteatro del volcán Cerro Negro y posible actividad eruptiva hacia comienzos del siglo XX, mientras que la actividad fumarólica en Chiles para entonces había desaparecido. Entre 1923 y 1924, se registró una sismicidad significativa (incluyendo un evento de profundidad superficial y magnitud 6 en la escala de Richter) que en su momento fue asociada a erupciones del volcán Chiles. La falta de datos más precisos sobre la actividad eruptiva de estos volcanes se debe posiblemente a la escasa población en la zona que pudiera hacer reportes sobre dicha actividad, a que correspondiera a eventos eruptivos menores y al hecho de considerarse, algunas veces, a los dos centros volcánicos como un solo volcán.  Documentary collection of historical information about the activity of the Chiles (0°49’N and 77°56’W)and Cerro Negro volcanoes (0°46’N and 77°57’W), on the Colombian-Ecuadorian border allows us to interpret that Chiles was active in pre-Hispanic times, since during colonial times it was already recognized as a volcano. By the middle of XIX century, Chiles volcano presented an intense fumarolicactivity possibly related to minor eruptive events that could have occurred between 1860 and 1869, which were focused towards the southern sector of the volcano. Hydrothermal and incipient fumarole activity into the amphitheater of Cerro Negro volcano is reported by 1870, and eruptive activity at the beginning of XX century, while the fumarolic activity in Chiles had disappeared. Later, between 1923 and 1924, a significant seismicity was recorded (including an event of shallow depth and magnitude 6 on the Richter scale) which, in turn, was associated with Chiles volcano eruptive activity. The lack of more precise data on the eruptive activity of these volcanoes is possibly due to the minor eruptive activity, to the sparse population in the area and to the notion that the two volcanoes were considered as one. &nbsp

El modelo lineal en experimentos con variables categorizadas, estudio de un caso.

Presenta una metodología estadística, para el análisis de experimentos, donde las variables tienen distribución multinomial y se refieren al número de individuos que pertenecen a cada una de las categorías, se utilizó la teoría del modelo lineal. La metodología se aplicó a un experimeto donde se evaluó el grado de pudrición de las mazorcas del maíz al ataque del hongo Fusarium sp. Los materiales evaluados fueron: Sogamoseño (variedad original), Sogamoseño (M.P.) 1, 2 y 3 de selección masal por prolificidad, los cruzamientos de Sogamoseño variedad original con el material prolífico MB 510 (M.P.) 8, Sogamoseño variedad original con el material no prolífico MB 513 (M.N.P.) 8, sus respectivos padres e ICA V 506 variedad comercial. Se utilizó el diseño de bloques al azar con 6 repeticiones. El análisis mostró diferencias significativas entre los materiales evaluados. Los materiales con mayor resistencia a la pudrición fueron, el material prolifico MB 510 (M.P.) 8, el no prolifico MB 513 (M.N.P.) 8 e ICA V 506 variedad comercia

Gravitational Redshift, Equivalence Principle, and Matter Waves

We review matter wave and clock comparison tests of the gravitational redshift. To elucidate their relationship to tests of the universality of free fall (UFF), we define scenarios wherein redshift violations are coupled to violations of UFF ("type II"), or independent of UFF violations ("type III"), respectively. Clock comparisons and atom interferometers are sensitive to similar effects in type II and precisely the same effects in type III scenarios, although type III violations remain poorly constrained. Finally, we describe the "Geodesic Explorer," a conceptual spaceborne atom interferometer that will test the gravitational redshift with an accuracy 5 orders of magnitude better than current terrestrial redshift experiments for type II scenarios and 12 orders of magnitude better for type III.Comment: Work in progress. 11 page