LAGO: The Latin American giant observatory

The Latin American Giant Observatory (LAGO) is an extended cosmic ray observatory composed of a network of water-Cherenkov detectors (WCD) spanning over different sites located at significantly different altitudes (from sea level up to more than 5000 m a.s.l.) and latitudes across Latin America, covering a wide range of geomagnetic rigidity cut-offs and atmospheric absorption/reaction levels. The LAGO WCD is simple and robust, and incorporates several integrated devices to allow time synchronization, autonomous operation, on board data analysis, as well as remote control and automated data transfer. This detection network is designed to make detailed measurements of the temporal evolution of the radiation flux coming from outer space at ground level. LAGO is mainly oriented to perform basic research in three areas: high energy phenomena, space weather and atmospheric radiation at ground level. It is an observatory designed, built and operated by the LAGO Collaboration, a non-centralized collaborative union of more than 30 institutions from ten countries. In this paper we describe the scientific and academic goals of the LAGO project - illustrating its present status with some recent results - and outline its future perspectives.Fil: Sidelnik, Iván Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Gerencia de Ingeniería Nuclear (CAB). División Neutrones y Reactores; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; ArgentinaFil: Asorey, Hernán Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Tecnología en Detección y Astropartículas. Comisión Nacional de Energía Atómica. Instituto de Tecnología en Detección y Astropartículas. Universidad Nacional de San Martín. Instituto de Tecnología en Detección y Astropartículas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; ArgentinaFil: Lago Collaboration. Latin American Giant Observatory; Argentin

O Problema de dous corpos con masa variable

Traballo Fin de Grao en Matemáticas. Curso 2018-2019[GL] No presente traballo tratamos un dos problemas máis representativos e relevantes da Mecánica Celeste: o Problema de dous corpos con masa variable. O obxectivo do texto é dar unha visión global deste tema así como particularizalo en diferentes escenarios de perda de masa. No desenvolvemento do mesmo faise un percorrido por esta liña de investigaci ón, con implicacións tanto matemáticas como físicas, comezando pola formulación do mesmo no caso non perturbado, sentando así os conceptos básicos e necesarios para o resto do texto. Continuaremos co que constitúe a cerna deste traballo, a explicación dos fundamentos teóricos da perda de masa e a súa influencia na dinámica dos corpos involucrados, contemplando diferentes leis e situacións que se dan na física estelar. Posteriormente trataremos casos particulares integrables e obteremos os resultados numéricos dos mesmos para algunhas situacións concretas. Finalmente inclúense os programas realizados polo autor do Traballo de Fin de Grao que proporcionan a integración dos diferentes casos estudados.[EN] In this work, we deal with one of the most representative and relevant issues of Celestial Mechanics which is the Two-body problem with variable mass. The objective of the text is to present a global vision of this topic as well as to focus on scenarios of mass loss. We review this line of research along with the mathematical implications as well as those of physics, beginning with the formulation in the case of no perturbation. In that way, we establish the basic and necessary concepts involved in the rest of the text. We continue with what constitutes the nucleus of this contribution including the explanation of the fundamental theories of mass loss and their influence on the dynamics of the involved bodies, considering different laws and situations related to phyisics and stellar dynamics. Finally, we treat particular integrable cases and we obtain the numerical results for concrete situations.We also include the programs carried out by the author of this TFG that provide the integration of the different cases

Potencia de la erupción del volcán Puyehue como un problema de Fermi

 Los docentes de la escuela media encuentran dificultades para interesar a los alumnos en la ciencia. Una ayuda en este sentido consiste en que, en la etapa de formación, se llame la atención de los futuros docen-tes sobre la base científica de fenómenos que observamos en nuestra vida diaria. En un primer curso común a los Profesorados en Física y en Química de la Universidad Nacional de Río Negro frecuentemen-te se plantea problemas de ese tipo, que a veces pueden resolverse usando el concepto de “problema de Fermi”, como un método que ayuda a agudizar la imaginación y la capacidad de observación y como un entrenamiento en el razonamiento lógico. La erupción del volcán Puyehue-Cordón Caulle del 4/06/2011 afectó la vida diaria de miles de habitantes norpatagónicos. Por ello encaramos junto a los alumnos, la estimación de la potencia del volcán en su primera erupción, como un problema de Fermi. Dado que utili-zamos datos disponibles en Internet y conocimientos al alcance de los alumnos de la escuela media y del primer año universitario, el método puede ser aprovechado por los docentes de esos niveles y extendido a otras situaciones

A survey of the European Open Science Cloud services for expanding the capacity and capabilities of multidisciplinary scientific applications

Open Science is a paradigm in which scientific data, procedures, tools and results are shared transparently and reused by society. The European Open Science Cloud (EOSC) initiative is an effort in Europe to provide an open, trusted, virtual and federated computing environment to execute scientific applications and store, share and reuse research data across borders and scientific disciplines. Additionally, scientific services are becoming increasingly data-intensive, not only in terms of computationally intensive tasks but also in terms of storage resources. To meet those resource demands, computing paradigms such as High-Performance Computing (HPC) and Cloud Computing are applied to e-science applications. However, adapting applications and services to these paradigms is a challenging task, commonly requiring a deep knowledge of the underlying technologies, which often constitutes a general barrier to its uptake by scientists. In this context, EOSC-Synergy, a collaborative project involving more than 20 institutions from eight European countries pooling their knowledge and experience to enhance EOSC’s capabilities and capacities, aims to bring EOSC closer to the scientific communities. This article provides a summary analysis of the adaptations made in the ten thematic services of EOSC-Synergy to embrace this paradigm. These services are grouped into four categories: Earth Observation, Environment, Biomedicine, and Astrophysics. The analysis will lead to the identification of commonalities, best practices and common requirements, regardless of the thematic area of the service. Experience gained from the thematic services can be transferred to new services for the adoption of the EOSC ecosystem framework. The article made several recommendations for the integration of thematic services in the EOSC ecosystem regarding Authentication and Authorization (federated regional or thematic solutions based on EduGAIN mainly), FAIR data and metadata preservation solutions (both at cataloguing and data preservation—such as EUDAT’s B2SHARE), cloud platform-agnostic resource management services (such as Infrastructure Manager) and workload management solutions.This work was supported by the European Union’s Horizon 2020 research and innovation programme under grant agreement No 857647, EOSC-Synergy, European Open Science Cloud - Expanding Capacities by building Capabilities. Moreover, this work is partially funded by grant No 2015/24461-2, São Paulo Research Foundation (FAPESP). Francisco Brasileiro is a CNPq/Brazil researcher (grant 308027/2020-5).Peer Reviewed"Article signat per 20 autors/es: Amanda Calatrava, Hernán Asorey, Jan Astalos, Alberto Azevedo, Francesco Benincasa, Ignacio Blanquer, Martin Bobak, Francisco Brasileiro, Laia Codó, Laura del Cano, Borja Esteban, Meritxell Ferret, Josef Handl, Tobias Kerzenmacher, Valentin Kozlov, Aleš Křenek, Ricardo Martins, Manuel Pavesio, Antonio Juan Rubio-Montero, Juan Sánchez-Ferrero "Postprint (published version

Una deducción analítica simple de la hodógrafa para el problema de Kepler

En la literatura es posible encontrar diversas deducciones didácticas de la órbita en el problema de Kepler. También, aunque en menor medida, es posible encontrar deducciones geométricas de la hodógrafa. Sin embargo, y a pesar de su importancia pedagógica, las deducciones analíticas de esta curva no son abundantes. Más aún la existencia de ese elemento no siempre es mencionada en los libros de texto. En este trabajo presentamos una deducción analítica sencilla de la hodógrafa, directamente a partir de las leyes de Newton del movimiento. Damos una expresión general para esta figura para las tres posibles trayectorias, acotadas (elipse y circunferencia) y no acotadas (parábola e hipérbola). También damos expresiones explícitas para el radio y la posición del centro en términos de los parámetros dinámicos del movimiento.<br /

The ARTI Framework: Cosmic Rays Atmospheric Background Simulations

ARTI is a complete framework intended to simulate the expected signals produced by the interaction of the secondary particles inside any Water Cherenkov Detector, WCD. ARTI comprises a simulation sequence by integrating three different simulation tools: a) magnetocosmics, to account for the geomagnetic field effects on the primary flux; b) CORSIKA, to simulate the atmospheric showers originated on the complete flux of cosmic rays in the energy range of interest and, thus, to estimate the expected flux of secondary particles at the site; and c) Geant4, for simulating the WCD detectors response to this secondary flux. In this work, we show the usage of the ARTI framework by calculating the expected flux of signals at eight sites from the Latin American Giant Observatory, LAGO. This covers a wide range of altitudes and geomagnetic rigidity cut-offs. This shows it is possible to estimate the secondary particle flux originated by cosmic rays at any location in the world. This flux could be used either to be injected into WCDs, to estimate the footprint generated by Gamma-Ray Burst events, or over a geological structure in muography applications.Comment: 10 page