The QUEST-La Silla AGN Variability Survey

We present the characterization and initial results from the QUEST-La Silla AGN variability survey. This is an effort to obtain well sampled optical light curves in extragalactic fields with unique multi-wavelength observations. We present photometry obtained from 2010 to 2012 in the XMM-COSMOS field, which was observed over 150 nights using the QUEST camera on the ESO-Schmidt telescope. The survey uses a broadband filter, the $Q$-band, similar to the union of the $g$ and the $r$ filters, achieving an intrinsic photometric dispersion of $0.05$ mag, and a systematic error of $0.05$ mag in the zero-point. Since some detectors of the camera show significant non-linearity, we use a linear correlation to fit the zero-points as a function of the instrumental magnitudes, thus obtaining a good correction to the non-linear behavior of these detectors. We obtain good photometry to an equivalent limiting magnitude of $r\sim 20.5$. Studying the optical variability of X-ray detected sources in the XMM-COSMOS field, we find that the survey is $\sim75-80$% complete to magnitudes $r\sim20$, and $\sim67$% complete to a magnitude $r\sim21$. The determination and parameterization of the structure function (${SF}_{norm}(\tau) = A \tau^{\gamma}$) of the variable sources shows that most BL AGN are characterized by $A > 0.1$ and $\gamma > 0.025$. It is further shown that variable NL AGN and GAL sources occupying the same parameter space in $A$ and $\gamma$ are very likely to correspond to obscured or low luminosity AGN. Our samples are, however, small, and we expect to revisit these results using larger samples with longer light curves obtained as part of our ongoing survey.Comment: Accepted for publication in Ap

Desarrollo de un sistema de gestión de seguridad de la información (SGSI) para la empresa Comware S.A. en la ciudad de Quito, aplicando la norma Iso / Iec 27001

El presente proyecto de titulación tiene como objetivo el diseño de un Sistema de Gestión de Seguridad de la Información para la empresa Comware S.A en la ciudad de Quito basado en la Norma ISO 2700:20051, con el fin de lograr un esquema que sirva como guía para la posterior implementación y certificación en la Norma ISO 27001:2005 en la empresa. Además se podrán evidenciar claramente amenazas y riesgos que se encuentran presentes y pueden llegar a afectar el correcto funcionamiento de los sistemas informáticos. De esta forma, los riesgos de seguridad en la red son identificados y minimizados en base a los procedimientos para el tratamiento de los mismos. También se realizó un análisis por medio de varios software que permitieron ver algunas falencias dentro de los sistemas que se manejan en la empresa y de esta forma realizar un análisis de las amenazas que se encuentran latentes en los sistemas informáticos. Por último se da una breve explicación de cuáles son los pasos a seguir para que la empresa pueda certificarse en la Norma ISO 27001:2005

A novel and adaptive angle diversity-based receiver for 6G underground mining VLC systems

Visible light communication (VLC) is considered an enabling technology for future 6G wireless systems. Among the many applications in which VLC systems are used, one of them is harsh environments such as Underground Mining (UM) tunnels. However, these environments are subject to degrading environmental and intrinsic challenges for optical links. Therefore, current research should focus on solutions to mitigate these problems and improve the performance of Underground Mining Visible Light Communication (UM-VLC) systems. In this context, this article presents a novel solution that involves an improvement to the Angle Diversity Receivers (ADRs) based on the adaptive orientation of the Photo-Diodes (PDs) in terms of the Received Signal Strength Ratio (RSSR) scheme. Specifically, this methodology is implemented in a hemidodecahedral ADR and evaluated in a simulated UM-VLC scenario. The performance of the proposed design is evaluated using metrics such as received power, user data rate, and bit error rate (BER). Furthermore, our approach is compared with state-of-the-art ADRs implemented with fixed PDs and with the Time of Arrival (ToA) reception method. An improvement of at least 60% in terms of the analyzed metrics compared to state-of-the-art solutions is obtained. Therefore, the numerical results demonstrate that the hemidodecahedral ADR, with adaptive orientation PDs, enhances the received optical signal. Furthermore, the proposed scheme improves the performance of the UM-VLC system due to its optimum adaptive angular positioning, which is completed according to the strongest optical received signal power. By improving the performance of the UM-VLC system, this novel method contributes to further consideration of VLC systems as potential and enabling technologies for future 6G deployments

Viabilidad en la aplicacion de la RSE a la IPS Dumian Medical S.A.S

1. Enlace al Código de Ética; https://triestarsj.wixsite.com/dumianmedical 2. Responsabilidad Social Empresarial Por medio de esta encuesta pretendemos establecer el grado de compromiso que la empresa para la que usted labora tiene con las recomendaciones de RSE. La encuesta es completamente anónima. ¿Está familiarizado con el reglamento de la empresa? NO SI ¿Qué tipo de problemas considera usted que su empresa soluciona en su comunidad? Ninguna Generando empleo Salud Todas las anteriores Bienestar Social ¿Sabe si su empresa contrata personas con discapacidad física? Si No ¿En el ámbito laboral, considera que las mujeres poseen igualdad de condiciones y oportunidades con respecto a los hombres? Si No ¿La empresa le ha proporcionado la suficiente capacitación para poder cumplir con sus funciones? Si No ¿La empresa cumple con las condiciones estipuladas en el contrato laboral? Si No ¿La empresa realiza campañas alusivas al cuidado del medio ambiente? Si No ¿La empresa maneja planes operativos para el ahorro de la energía? Si No ¿Usted cree que la empresa promueve programas de responsabilidad social (reciclaje, beneficios a la comunidad, incentivos al trabajador)? Si No ¿Cree usted que la organización atiende oportunamente los reclamos realizados por los clientes? Si No ¿Considera que la organización tiene como objetivo principal la satisfacción del cliente y/o consumidores? Si No ¿Piensa usted que la empresa realiza actividades comunitarias? Si No ¿Se involucra usted en las actividades comunitarias realizadas por la empresa? Si NoEl presente trabajo es fruto de un proceso de análisis colectivo en la empresa Dumián Medical. El fin es implementar actividades de responsabilidad social empresarial que permitan a la organización acreditarse con la norma ISO26001. Se parte de un proceso de recolección de datos que permiten determinar los principales inconvenientes que tiene la entidad. Se utiliza la herramienta del árbol de problemas y de objetivos con el fin de visualizar con facilidad la problemática encontrada y el camino a seguir para darle solución. Posteriormente, se implementa el plan de acción y responsabilidad empresarial en conjunto con el plan de mejoramiento económico, social y ecológico, estableciendo la forma en que se hará la distribución del presupuesto y las fuentes de financiación. Cada una de estas acciones se respaldan de manera simultánea con la creación del código de ética de la entidad.This contribution is the fruit of collective work that analyses the company Dumian Medical. The aim is to find a way of implementing social responsibility activities that allow the organization to follow ISO26000 recommendations. The study starts collecting information to determine the main problems the company has. The Problem tree is used as a tool to reach such a goal. Furthermore, the objective tree is used to determine possible solutions to the problem. Subsequently, two plans are implemented: the corporate responsibility plan and the improvement plan of economy, society and environment. It is also established the way the budge will be distributed and the sources of funding. Simultaneously, the ethics code of the company was created

The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment

The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since July 2014. This paper describes the second data release from this phase, and the fourteenth from SDSS overall (making this, Data Release Fourteen or DR14). This release makes public data taken by SDSS-IV in its first two years of operation (July 2014-2016). Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey (eBOSS); the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data driven machine learning algorithm known as "The Cannon"; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS website (www.sdss.org) has been updated for this release, and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020, and will be followed by SDSS-V.Comment: SDSS-IV collaboration alphabetical author data release paper. DR14 happened on 31st July 2017. 19 pages, 5 figures. Accepted by ApJS on 28th Nov 2017 (this is the "post-print" and "post-proofs" version; minor corrections only from v1, and most of errors found in proofs corrected

Algunas evidencias de aplicación

Libro temático especializadoLa sustentabilidad también debe aplicarse al sistema de producción, buscando impulsar transformaciones graduales de los estilos y modelos productivos tradicionales a unas de mayor eficiencia. Y donde se incorpore la dimensión ambiental y geográfico-espacial, para crear estructuras productivas más progresivas y equitativas en las sociedades. Todo esto, como alternativa para revertir las tendencias de escasez y agotamiento de los recursos naturales, así como de los desequilibrios globales, cuyos costos permean todos los tejidos humanos. De esta manera, la “sustentabilidad productiva” se concibe como la generación de bienes y servicios con ciertos estándares de calidad, bajo un esquema de eficiencia, rendimiento y de organización inclusiva e integrada, con baja presión al ambiente y uso racional de los recursos, garantizando la estadía y permanencia de los insumos y materiales en el tiempo. Desde esta perspectiva, la producción sustentable y el crecimiento de largo plazo pueden ser explicados por la capacidad que tienen las economías para generar e incorporar conocimientos y tecnologías. De ahí que, la educación y las cualificaciones del capital humano, los cambios en la organización de la producción y la calidad institucional, sean elementos nodales para avanzar en la consolidación de este ambiente productivo

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