Análisis comparativos de métodos de diseño de mezclas de un hormigón de alta resistencia conformado por agregados procedentes de la cantera de Pintag

El siguiente artículo da a conocer el diseño de mezcla de un hormigón de alta resistencia de 60 MPa conformado por agregados procedentes de la cantera de Pintag bajo la aplicación de tres métodos de diseño para su dosificación (Métodos del ACI, Fuller y Thompson y Densidad Optima). La investigación dio inicio con la caracterización de los agregados, resultados que fueron utilizados en los diseños para dosificación de hormigón a partir de diferentes métodos. Durante el proceso experimental se realizaron mezclas de prueba elaboradas a partir de la adición de agua en la mezcla y a partir de la incorporación de un aditivo superplastificante, con el fin de definir la conformación de la mezcla, para obtener la resistencia y trabajabilidad requerida. Por consiguiente, las mezclas definitivas se definieron mediante la variación de las proporciones de los materiales (agregado grueso y agregado fino) conjuntamente con la incorporación del aditivo superplastificante Viscomix-Setmix para mejorar las condiciones de homogeneidad y disminuir la cantidad de agua en la mezcla. En cada mezcla se obtuvo muestras representativas de concreto fresco a las mismas que se realizaron ensayos de asentamiento, temperatura, densidad, contenido de aire, fabricación y curado de especímenes cilíndricos y, finalmente ensayos de compresión a edades de 1, 3, 7 y 28 días, alcanzando a los 28 días resistencias a la compresión requerida de 72 MPa.The following article reveals the design of a 60 MPa high strength concrete consisting of aggregates from the Pintag quarry under the application of different design methods for dosing (ACI Method, Fuller and Thompson Method and Optical Density Method). The investigation began with the characterization of the aggregates, results that were used in the designs for concrete dosing from different methods. During the experimental process, test mixtures prepared from the addition of water in the mixture and from the incorporation of a superplasticizer additive are mixed, in order to define the conformation of the mixture and reducing the water-cement ratio to obtain the resistance required respectively. In general, definitive mixtures are defined by varying the proportions of materials (coarse aggregate and fine aggregate) with the addition of Viscomix-Setmix superplasticizer additive to improve homogeneity conditions and decrease the amount of water in the mixture. In each mixture, representative samples of fresh concrete were obtained, in which settlement, temperature, density, air content, manufacturing and curing of cylindrical specimens were performed, and finally compression tests at ages 1, 3, 7 and 28 days, reaching at 28 days of required compressive strength of 72MPa

Subcutaneous emphysema secondary to dental treatment : case Report

Subcutaneous emphysema is a relatively rare complication of dental treatment, although increasingly due to the use of high pressure air instruments. Many cases go unrecognized or are misdiagnosed. Majority of patients with this complication resolve spontaneously after 5 to 10 days, however some can advance to potentially life-threatening complications. A case of subcutaneous emphysema during restorative procedure in a 52-year-old woman was treated in the Docent Odontological Clinic of the Frontera University is presented. The differential diagnosis and management of this condition is discussed. Our purpose is not to add one more case of emphysema to literature, but to show dentists that in simple restorative procedures using air pressure instruments, they could be exposed to this complication

The geography of discontent and the rise of far-right politics in Portugal

Portugal stands on the brink of commemorating 50 years since its transformative “Carnation” revolution, which ushered in democracy. However, as João Almeida and Andrés Rodríguez-Pose explain, the current political climate casts a shadow over this milestone. The country’s recent general election spotlighted a disturbing trend: the rise of the far right. This surge is driven by the grievances of people living in overlooked regions of Portugal, people who after 50 years of democracy – in a move reminiscent of the “revenge of the places that don’t matter” elsewhere – seem to have given up on mainstream parties

The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V

The documentation workshop for DR18 ("DocuLlama") was held virtually in 2022 September, organized by Anne-Marie Weijmans and Gail Zasowski. This event was the main venue for the documentation of DR18, including significant progress on this paper and the website, and it was attended by Scott Anderson, Joel Brownstein, Joleen Carlberg, Niall Deacon, Nathan De Lee, John Donor, Tom Dwelly, Keith Hawkins, Jennifer Johnson, Sean Morrison, Jordan Raddick, Jose Sanchez-Gallego, Diogo Souto, Taylor Spoo, Ani Thakar, Nick Troup, Anne-Marie Weijmans, Gail Zasowski, William Zhang, three llamas, and an elderly goat named Nibblets. Funding for the Sloan Digital Sky Survey V has been provided by the Alfred P. Sloan Foundation, the HeisingSimons Foundation, the National Science Foundation, and the Participating Institutions. SDSS acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS website is www.sdss.org. SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration, including the Carnegie Institution for Science, Chilean National Time Allocation Committee (CNTAC) ratified researchers, the Gotham Participation Group, Harvard University, The Johns Hopkins University, L'Ecole polytechnique federale de Lausanne (EPFL), Leibniz-Institut fur Astrophysik Potsdam (AIP), Max-Planck-Institut fur Astronomie (MPIA Heidelberg), Max-Planck-Institut fur Extraterrestrische Physik (MPE), Nanjing University, National Astronomical Observatories of China (NAOC), New Mexico State University, The Ohio State University, Pennsylvania State University, Smithsonian Astrophysical Observatory, Space Telescope Science Institute (STScI), the Stellar Astrophysics Participation Group, Universidad Nacional Autonoma de Mexico, University of Arizona, University of Colorado Boulder, University of Illinois at Urbana-Champaign, University of Toronto, University of Utah, University of Virginia, and Yale University. The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen's University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under grant No. NNX08AR22G, issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation grant No. AST-1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This work is based in part on observations made with the Spitzer Space Telescope, which was operated by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This work presents results from the European Space Agency (ESA) space mission Gaia. Gaia data are being processed by the Gaia Data Processing and Analysis Consortium (DPAC). Funding for the DPAC is provided by national institutions, in particular the institutions participating in the Gaia MultiLateral Agreement (MLA). The Gaia mission website is https://www.cosmos.esa.int/gaia. The Gaia archive website is https://archives.esac.esa.int/gaia. The Legacy Surveys consist of three individual and complementary projects: the Dark Energy Camera Legacy Survey (DECaLS; Proposal ID #2014B-0404; PIs: David Schlegel and Arjun Dey), the Beijing-Arizona Sky Survey (BASS; NOAO Prop. ID #2015A-0801; PIs: Zhou Xu and Xiaohui Fan), and the Mayall z-band Legacy Survey (MzLS; Prop. ID #2016A-0453; PI: Arjun Dey). DECaLS, BASS, and MzLS together include data obtained, respectively, at the Blanco telescope, Cerro Tololo Inter-American Observatory, NSF's NOIRLab; the Bok telescope, Steward Observatory, University of Arizona; and the Mayall telescope, Kitt Peak National Observatory, NOIRLab. Pipeline processing and analyses of the data were supported by NOIRLab and the Lawrence Berkeley National Laboratory (LBNL). The Legacy Surveys project is honored to be permitted to conduct astronomical research on Iolkam Duaag (Kitt Peak), a mountain with particular significance to the Tohono Oaodham Nation. NOIRLab is operated by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. LBNL is managed by the Regents of the University of California under contract to the U.S. Department of Energy. This project used data obtained with the Dark Energy Camera (DECam), which was constructed by the Dark Energy Survey (DES) collaboration. Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, the Center for Cosmology and Astro-Particle Physics at the Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico and the Ministerio da Ciencia, Tecnologia e Inovacao, the Deutsche Forschungsgemeinschaft, and the Collaborating Institutions in the Dark Energy Survey. The Collaborating Institutions are Argonne National Laboratory, the University of California at Santa Cruz, the University of Cambridge, Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid, the University of Chicago, University College London, the DES-Brazil Consortium, the University of Edinburgh, the Eidgenossische Technische Hochschule (ETH) Zurich, Fermi National Accelerator Laboratory, the University of Illinois at Urbana-Champaign, the Institut de Ciencies de l'Espai (IEEC/CSIC), the Institut de Fisica d'Altes Energies, Lawrence Berkeley National Laboratory, the Ludwig Maximilians Universitat Munchen and the associated Excellence Cluster Universe, the University of Michigan, NSF's NOIRLab, the University of Nottingham, the Ohio State University, the University of Pennsylvania, the University of Portsmouth, SLAC National Accelerator Laboratory, Stanford University, the University of Sussex, and Texas A&M University. BASS is a key project of the Telescope Access Program (TAP), which has been funded by the National Astronomical Observatories of China, the Chinese Academy of Sciences (the Strategic Priority Research Program "The Emergence of Cosmological Structures," grant #XDB09000000), and the Special Fund for Astronomy from the Ministry of Finance. BASS is also supported by the External Cooperation Program of Chinese Academy of Sciences (grant #114A11KYSB20160057) and the Chinese National Natural Science Foundation (grants #12120101003 and #11433005). The Legacy Survey team makes use of data products from the Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE), which is a project of the Jet Propulsion Laboratory/California Institute of Technology. NEOWISE is funded by the National Aeronautics and Space Administration. The Legacy Surveys imaging of the DESI footprint is supported by the Director, Office of Science, Office of High Energy Physics of the U.S. Department of Energy, under Contract No. DE-AC02-05CH1123; by the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility under the same contract; and by the U.S. National Science Foundation, Division of Astronomical Sciences, under Contract No. AST-0950945 to NOAO. The national facility capability for SkyMapper has been funded through ARC LIEF grant LE130100104 from the Australian Research Council, awarded to the University of Sydney, the Australian National University, Swinburne University of Technology, the University of Queensland, the University of Western Australia, the University of Melbourne, Curtin University of Technology, Monash University, and the Australian Astronomical Observatory. SkyMapper is owned and operated by The Australian National University's Research School of Astronomy and Astrophysics. The survey data were processed and provided by the SkyMapper Team at ANU. The SkyMapper node of the All-Sky Virtual Observatory (ASVO) is hosted at the National Computational Infrastructure (NCI). The development and support of the SkyMapper node of the ASVO has been funded in part by Astronomy Australia Limited (AAL) and the Australian Government through the Commonwealth's Education Investment Fund (EIF) and National Collaborative Research Infrastructure Strategy (NCRIS), particularly the National eResearch Collaboration Tools and Resources (NeCTAR) and the Australian National Data Service (ANDS) Projects. This paper includes data collected by the TESS mission. Funding for the TESS mission is provided by NASA's Science Mission Directorate. We acknowledge the use of public data from the Swift data archive. Based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA. This research has made use of NASA's Astrophysics Data System Bibliographic Services.The eighteenth data release (DR18) of the Sloan Digital Sky Survey (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific programs or "Mappers": the Milky Way Mapper (MWM), the Black Hole Mapper (BHM), and the Local Volume Mapper. This data release contains extensive targeting information for the two multiobject spectroscopy programs (MWM and BHM), including input catalogs and selection functions for their numerous scientific objectives. We describe the production of the targeting databases and their calibration and scientifically focused components. DR18 also includes & SIM;25,000 new SDSS spectra and supplemental information for X-ray sources identified by eROSITA in its eFEDS field. We present updates to some of the SDSS software pipelines and preview changes anticipated for DR19. We also describe three value-added catalogs (VACs) based on SDSS-IV data that have been published since DR17, and one VAC based on the SDSS-V data in the eFEDS field.National Aeronautics & Space Administration (NASA) NNX08AR22GSpanish GovernmentStellar Astrophysics Participation GroupAssociation of Universities for Research in Astronomy (AURA)Dark Energy Camera (DECam)Collaborating Institutions in the Dark Energy Surve

Desarrollo de software para el diseño de antenas Yagi-Uda y reflector de esquina

The following document describes the development of a program for the design of Yagi-Uda and Corner Reflector antennas; it is understood by antenna any object designed to send and receive electromagnetic waves into free space. This work begins with a theoric study of the antennas: their characteristics, different types and their principal applications. The characteristics to be analyzed are the radiation patters in both planes, directivity and Front-to- Back gain, the last one is understood as the relationship in decibels between the gain in the direction of propagation and the gain in the opposite direction.En el presente documento se describe el desarrollo de un programa dedicado al diseño de antenas Yagi-Uda y Reflectores de Esquina; se entiende por antena a cualquier dispositivo diseñado con el objetivo de emitir o recibir ondas electromagnéticas hacia el espacio libre. Este trabajo inicia con un estudio teórico de antenas: sus características, diferentes modelos y sus principales aplicaciones. Las características que se van a analizar son los patrones de radiación en ambos planos, directividad y ganancia frente - espalda, entendiéndose la última como la relación en decibeles entre la ganancia en la dirección de propagación y la ganancia en la dirección opuesta

G-band Spectral Synthesis in Solar Magnetic Concentrations

Narrow band imaging in the G-band is commonly used to trace the small magnetic field concentrations of the Sun, although the mechanism that makes them bright has remained unclear. We carry out LTE syntheses of the G-band in an assorted set of semi-empirical model magnetic concentrations. The syntheses include all CH lines as well as the main atomic lines within the band-pass. The model atmospheres produce bright G-band spectra having many properties in common with the observed G-band bright points. In particular, the contrast referred to the quiet Sun is about twice the contrast in continuum wavelengths. The agreement with observations does not depend on the specificities of the model atmosphere, rather it holds from single fluxtubes to MIcro-Structured Magnetic Atmospheres. However, the agreement requires that the real G-band bright points are not spatially resolved, even in the best observations. Since the predicted G-band intensities exceed by far the observed values, we foresee a notable increase of contrast of the G-band images upon improvement of the angular resolution. According to the LTE modeling, the G-band spectrum emerges from the deep photosphere that produces the continuum. Our syntheses also predict solar magnetic concentrations showing up in continuum images but not in the G-band . Finally, we have examined the importance of the CH photo-dissociation in setting the amount of G-band absorption. It turns out to play a minor role.Peer reviewe

La prueba de actos de naturaleza sexual que no dejan rastro en el delito de abuso sexual

Historically, sexual assault crimes have not taken the social impact they deserve. It is considered that there is not a serious violation of the victim's rights that have been sexually assaulted compared to other sexual crimes. It is for this reason that the concept of the type of sexual abuse has been recently included within the laws worldwide and its evolution has been the product of current legislative movements...Históricamente, el delito de abuso sexual no ha tomado la repercusión social que merece por considerarse que en el mismo no hay una grave vulneración a los derechos de la víctima, a comparación de otros delitos sexuales. Es por esta razón que el tipo de abuso sexual consta hace muy poco tiempo dentro de las legislaciones a nivel mundial y su evolución ha sido producto de movimientos legislativos actuales..

Plan de negocio Empresa de producción de productos de hogar y descartables de plástico.

Este documento pretende demostrar la oportunidad de negocio existente de productos de plástico desechables y línea hogar; dentro de una industria dinámica que crece a paso seguro. Dicho crecimiento se debe a cambios de hábitos de las personas quienes cada día disponen de menos tiempo y necesitan soluciones inmediatas para el diario vivir. El Mercado actual de Plásticos, que incluye a desechables y línea hogar, bordea los $1,500 millones, donde existe una demanda continua para productos desechables de plástico así como de productos para el hogar. El proyecto se enfoca en la venta de artículos plásticos que serán comercializados en seis ciudades del país, a través de distribuidores mayoristas ubicados en estas ciudades. Se requiere una inversión aproximada de$ 419 mil dólares, principalmente para la adquisición de maquinaria de inyección y capital de trabajo. La estructura de la industria obliga a plantear estrategias sectoriales que aseguren el rendimiento esperado de la inversión. En este sentido, la principal estrategia se enfoca a generar relaciones solidas a largo plazo con proveedores buscando que ambas partes ganen. El proceso de aprovisionamiento de materias primas es crítico dada la volatilidad en el precio de materias primas, por ello es importante un continuo monitoreo del mercado para saber cuando y cuanto comprar

La evolución del gasto público en el sector salud en el Ecuador: Análisis de su contribución en el mejoramiento de la calidad del servicio otorgado. Período 2007-2012

En la presente investigación se analizan la provisión de servicios de salud por parte de la Red Pública del Ministerio de Salud en el Ecuador, su punto de partida empieza con las políticas enmarcadas en el Plan Nacional del Buen Vivir diseñadas por la Secretaría Nacional de Planificación y Desarrollo (SENPLADES) que se ajustan a los objetivos de la Carta Magna del Ecuador del año 2008.Gracias al proceso de cambio y reestructura del MSP se han diseñado varios programas que apuntan a la mejora en la calidad del servicio sanitario a nivel nacional, es así que se analizan puntos clave como los incrementos en los salarios de los profesionales de la salud acompañada de la nueva jornada laboral, así como también se analiza criterios de calidad desde el usuario externo y la Entidad Rectora en el país. El incremento del presupuesto fiscal, destinado hacia el sector salud ha colaborado considerablemente para el desarrollo de programas y modelos acordes a la época y sobre todo ajustándose a la demanda a nivel nacional, eliminando barreras de acceso y creando una cultura social de prevención..

Yoga como tratamiento fisioterapéutico de profilaxis para el parto en embarazadas con edad gestacional de tres a nueve meses, a realizarse en la clínica Imbamédical de la ciudad de Ibarra en el periodo de Julio del 2011 a Agosto del 2012

Objetivo General Implementar un tratamiento fisioterapéutico de profilaxis con yoga en mujeres embarazadas con edad gestacional de tres a nueve meses, que acuden a la Clínica ImbaMedical de la ciudad de Ibarra en el periodo de Julio del 2011 a Agosto del 2012, mediante la técnica de Yoga, con el fin de preparar y facilitar el parto.El proyecto desarrollado tiene como inicio el análisis de una problemática, para lo cual se analiza una solución que implica la combinación de dos técnicas que son el Yoga y la Fisioterapia, por lo cual se hizo un estudio de factibilidad de combinación, teniendo como resultado una similitud y un marco de acople perfectos, ofreciendo dentro del campo de la salud una nueva alternativa de tratamiento y cuidados para las mujeres que se encuentran en etapa gestacional y al mismo tiempo se logra abarcar todas las necesidades físicas y mentales que ellas requieren. El estudio se llevó a cabo en la Clínica ImbaMedical de la ciudad de Ibarra. Este trabajo tuvo como objetivo crear un plan terapéutico y una guía que pueda ser usada por otros profesionales o las madres que se encuentran embarazadas, para que puedan seguirlos sin dificultad. La metodología usada corresponde a un estudio de orientación no experimental toda vez que no se asigna la variable de interés en forma directa por el responsable del estudio, el diseño es de tipo de corte transversal ya que es un estudio insertado en el tiempo ya expuesto en el que se recolecta la información en un momento dado, descriptivo porque se utilizó métodos, técnicas e instrumentos conocidos para mejorar sus resultados. La población con la que se trabajo es de 25 mujeres embarazadas las cuales cumplían los requisitos de edad y tiempo de gestación solicitados, la terapéutica se la realizo en tres grupos de trabajo, en la mañana, tarde y noche, los cuales se los distribuyo de acuerdo a los horarios de disponibilidad de las pacientes, se realizó encuestas y entrevistas pre y post parto, también se hizo recopilación de información con expertos en el tema. Resultados: Mediante una práctica regular se notan beneficios como: reducción de estrés, ansiedad, alcanzando progresivamente un completo control del sistema nervioso para conseguir el descanso necesario. La parte física es la más necesaria ya que mejorará la flexibilidad y movilidad del cuerpo. Conclusiones: Se estableció la edad gestacional desde la cual se puede realizar la terapia con Yoga, los beneficios del tratamiento, se realizó una guía terapéutica y se comprobó los resultados al final de la investigación