763 research outputs found

    TELECONTROL DE PESAJE Y ORDEÑO MECÁNICO DE GANADO VACUNO

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    El propósito de este proyecto es crear un prototipo de un sistema de telecontrol de pesaje y ordeño mecánico de ganado vacuno utilizando hardware de bajo costo y software libre. En el prototipo se utilizan dos sensores, celdas de carga. El primero, a través de cálculos matemáticos permite obtener el peso de la leche y su volumen. El segundo, permite conocer el peso del balanceado que se le proporciona a la vaca después de que ha culminado la etapa de ordeño. Para el monitoreo del estado y valores en tiempo real de las variables del sistema de telecontrol se implementa un servidor web que permite escribir variables en el módulo lógico Siemens LOGO! para controlar el encendido o apagado de los actuadores del sistema de ordeño. El prototipo del sistema de telecontrol es probado creando una red de área local, utilizando un enrutador que permitirá el envío y recepción de datos desde el servidor hacia el modulo lógico Siemens LOGO!. Los resultados son una interfaz web con un diseño simple y de fácil uso para el usuario, además adaptables a diferentes dispositivos, estableciendo una conexión segura al acceder de forma remota al sistema utilizando cifrado de datos.The purpose of this project is to present a prototype remote weighing system and milking cattle using low-cost hardware and free software. In the implementation of the prototype two sensors, load cells are used. The first through mathematical calculations allows us to get the weight of milk and volume. The second allows us to know the weight of the balanced which gives the cow after it has completed the milking stage. For status monitoring and real-time values of variables system remote web server is implemented. Also you can write variables in the Siemens LOGO! to control the switching on or off of the actuators of the milking system. The prototype system is tested by creating a remote local area network using a router that allows sending and receiving data from the server to the logic module Siemens LOGO!. The results are a web interface with a simple and easy to use for the user design, and adaptable to different screen sizes, establish a secure connection to remotely access the system using data encryption

    Telecontrol de pesaje y ordeño mecánico de ganado vacuno

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    El propósito de este proyecto es crear un prototipo de un sistema de telecontrol de pesaje y ordeño mecánico de ganado vacuno utilizando hardware de bajo costo y software libre. En el prototipo se utilizan dos sensores, celdas de carga. El primero, a través de cálculos matemáticos permite obtener el peso de la leche y su volumen. El segundo, permite conocer el peso del balanceado que se le proporciona a la vaca después de que ha culminado la etapa de ordeño. Para el monitoreo del estado y valores en tiempo real de las variables del sistema de telecontrol se implementa un servidor web que permite escribir variables en el módulo lógico Siemens LOGO! para controlar el encendido o apagado de los actuadores del sistema de ordeño. El prototipo del sistema de telecontrol es probado creando una red de área local, utilizando un enrutador que permitirá el envío y recepción de datos desde el servidor hacia el modulo lógico Siemens LOGO!. Los resultados son una interfaz web con un diseño simple y de fácil uso para el usuario, además adaptables a diferentes dispositivos, estableciendo una conexión segura al acceder de forma remota al sistema utilizando cifrado de datos.The purpose of this project is to present a prototype remote weighing system and milking cattle using low-cost hardware and free software. In the implementation of the prototype two sensors, load cells are used. The first through mathematical calculations allows us to get the weight of milk and volume. The second allows us to know the weight of the balanced which gives the cow after it has completed the milking stage. For status monitoring and real-time values of variables system remote web server is implemented. Also you can write variables in the Siemens LOGO! to control the switching on or off of the actuators of the milking system. The prototype system is tested by creating a remote local area network using a router that allows sending and receiving data from the server to the logic module Siemens LOGO!. The results are a web interface with a simple and easy to use for the user design, and adaptable to different screen sizes, establish a secure connection to remotely access the system using data encryption

    Producción de alimento balanceado para mascotas a partir de los residuos de curtiembre generados en las etapas de dividido y descarne.

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    Este proyecto tuvo como finalidad diseñar un proceso de producción de alimento balanceado para mascotas a partir de los residuos generados en la etapa de dividido y descarne en curtiembres. Se realizó varias pruebas piloto a nivel laboratorio, las mismas que se basaron en 3 tipos de secado (secado eléctrico,secado a gas y secado al ambiente) deduciendo así el método más idóneo mediante pruebas estadísticas, la caracterización de la materia prima se realizó en base a métodos y técnicas recopiladas en la Norma Técnica Ecuatoriana NTE INEN-ISO 6498 determinando que los residuos de curtición son aptos para este fin ya que contienen el porcentaje proteico necesario para la alimentación de las mascotas. La caracterización del producto final se efectuó basándose en la Norma Técnica Ecuatoriana NTE INEN 187, la misma que especifica los parámetros físicos y microbiológicos que necesita cumplir el alimento balanceado para su consumo, los resultados obtenidos fueron los más adecuados. Finalmente, el proceso seleccionado como el más idóneo incluye recepción de la materia prima, lavado, desencalado, cortado, moldeado, blanqueado, secado mediante un secador de bandejas eléctrico, empaquetado y etiquetado. Este proceso es rentable ya que se logró la recuperación de uno de los residuos sólidos de curtición de la empresa dándole un valor agregado, sin embargo, se recomienda probar otras técnicas de secado para mejorar la calidad del producto final y así abaratar los costos de producción.The purpose of this project was to design a production process of balanced food for pets by processing waste generated in the stages of splitting and f leshing, in tannery. In order to make this possible, several tests were carried out at the laboratory level, these ests were based on the analysis of three types of drying (electric drying, gas drying and drying to room temperature) thus determining the mostsuitable method by means of statistics tests, the characterization of the raw material was carried on by methods and techniques compiled in the Ecuadorian Technical Standard NTE INEN-ISO 6498 determining that the tanning residues are suitable for this purpose since they contain the percentage of protein necessary to feed the pets. In addition to this, the tests for the validation of the final product carried out were based on the Ecuadorian Technical Standard NTE INEN 187, which specifies the physical and microbiological parameters that the balanced food needs to meet for its consumption, the collected results were the most appropriate. Finally, the most suitable process includes reception of the raw material, washing, deliming, cutting, molding, blanching, dried by means of an electric tray dryer, packaging, and labelling. The design ofthis process is profitable for the company since it was possible to recover one of the elements of the solid waste from tanning by giving it an added value, it is recommended to try other drying techniques to improve the quality of the final product, and reduce the production costs

    Engineering nanoparticles with pure high-order multipole scattering

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    The ability to control scattering directionality of nanoparticles is in high demand for many nanophotonic applications. One of the challenges is to design nanoparticles producing pure high-order multipole scattering (e.g., octopole, hexadecapole), whose contribution is usually negligible compared to strong low-order multipole scattering (i.e., dipole or quadrupole). Here we present an intuitive way to design such nanoparticles by introducing a void inside them. We show that both shell and ring nanostructures allow regimes with nearly pure high-order multipole scattering. Experimentally measured scattering diagrams from properly designed silicon rings at near-infrared wavelengths (~ 800 nm) reproduce well scattering patterns of an electric octopole and magnetic hexadecapole. Our findings advance significantly inverse engineering of nanoparticles from given complex scattering characteristics, with possible applications in biosensing, optical metasurfaces, and quantum communications.Comment: Submitted to ACS Photonic

    Multiplex Real-Time PCR Assay Using TaqMan Probes for the Identification of Trypanosoma cruzi DTUs in Biological and Clinical Samples

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    Background: Trypanosoma cruzi has been classified into six Discrete Typing Units (DTUs), designated as TcI–TcVI. In order to effectively use this standardized nomenclature, a reproducible genotyping strategy is imperative. Several typing schemes have been developed with variable levels of complexity, selectivity and analytical sensitivity. Most of them can be only applied to cultured stocks. In this context, we aimed to develop a multiplex Real-Time PCR method to identify the six T. cruzi DTUs using TaqMan probes (MTq-PCR).Methods/Principal Findings: The MTq-PCR has been evaluated in 39 cultured stocks and 307 biological samples from vectors, reservoirs and patients from different geographical regions and transmission cycles in comparison with a multi-locus conventional PCR algorithm. The MTq-PCR was inclusive for laboratory stocks and natural isolates and sensitive for direct typing of different biological samples from vectors, reservoirs and patients with acute, congenital infection or Chagas reactivation. The first round SL-IR MTq-PCR detected 1 fg DNA/reaction tube of TcI, TcII and TcIII and 1 pg DNA/reaction tube of TcIV, TcV and TcVI reference strains. The MTq-PCR was able to characterize DTUs in 83% of triatomine and 96% of reservoir samples that had been typed by conventional PCR methods. Regarding clinical samples, 100% of those derived from acute infected patients, 62.5% from congenitally infected children and 50% from patients with clinical reactivation could be genotyped. Sensitivity for direct typing of blood samples from chronic Chagas disease patients (32.8% from asymptomatic and 22.2% from symptomatic patients) and mixed infections was lower than that of the conventional PCR algorithm.Conclusions/Significance: Typing is resolved after a single or a second round of Real-Time PCR, depending on the DTU. This format reduces carryover contamination and is amenable to quantification, automation and kit production.This work received financial support from the Ministry of Science and Technology of Argentina [PICT 2011-0207 to AGS] and the National Scientific and Technical Research Council in Argentina (CONICET) [PIP 112 2011-010-0974 to AGS]. Work related to evaluation of biological samples was partially sponsored by the Pan-American Health Organization (PAHO) [Small Grants Program PAHO-TDR]; the Drugs and Neglected Diseases Initiative (DNDi, Geneva, Switzerland), Wellcome Trust (London, United Kingdom), SANOFI-AVENTIS (Buenos Aires, Argentina) and the National Council for Science and Technology in Mexico (CONACYT) [FONSEC 161405 to JMR]

    5to. Congreso Internacional de Ciencia, Tecnología e Innovación para la Sociedad. Memoria académica

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    El V Congreso Internacional de Ciencia, Tecnología e Innovación para la Sociedad, CITIS 2019, realizado del 6 al 8 de febrero de 2019 y organizado por la Universidad Politécnica Salesiana, ofreció a la comunidad académica nacional e internacional una plataforma de comunicación unificada, dirigida a cubrir los problemas teóricos y prácticos de mayor impacto en la sociedad moderna desde la ingeniería. En esta edición, dedicada a los 25 años de vida de la UPS, los ejes temáticos estuvieron relacionados con la aplicación de la ciencia, el desarrollo tecnológico y la innovación en cinco pilares fundamentales de nuestra sociedad: la industria, la movilidad, la sostenibilidad ambiental, la información y las telecomunicaciones. El comité científico estuvo conformado formado por 48 investigadores procedentes de diez países: España, Reino Unido, Italia, Bélgica, México, Venezuela, Colombia, Brasil, Estados Unidos y Ecuador. Fueron recibidas un centenar de contribuciones, de las cuales 39 fueron aprobadas en forma de ponencias y 15 en formato poster. Estas contribuciones fueron presentadas de forma oral ante toda la comunidad académica que se dio cita en el Congreso, quienes desde el aula magna, el auditorio y la sala de usos múltiples de la Universidad Politécnica Salesiana, cumplieron respetuosamente la responsabilidad de representar a toda la sociedad en la revisión, aceptación y validación del conocimiento nuevo que fue presentado en cada exposición por los investigadores. Paralelo a las sesiones técnicas, el Congreso contó con espacios de presentación de posters científicos y cinco workshops en temáticas de vanguardia que cautivaron la atención de nuestros docentes y estudiantes. También en el marco del evento se impartieron un total de ocho conferencias magistrales en temas tan actuales como la gestión del conocimiento en la universidad-ecosistema, los retos y oportunidades de la industria 4.0, los avances de la investigación básica y aplicada en mecatrónica para el estudio de robots de nueva generación, la optimización en ingeniería con técnicas multi-objetivo, el desarrollo de las redes avanzadas en Latinoamérica y los mundos, la contaminación del aire debido al tránsito vehicular, el radón y los riesgos que representa este gas radiactivo para la salud humana, entre otros

    Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

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    A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

    Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

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    A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV
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