ANÁLISIS DEL MÉTODO DE CORRIMIENTO DE FASE PARA ESCANEO Y RECONSTRUCCIÓN 3D DE OBJETOS

ResumenEn el presente trabajo se muestra el análisis realizado al método de corrimiento de fase utilizado para el proceso de escaneo y reconstrucción de objetos 3D. El análisis se enfoca en el algoritmo de 3 pasos, y se analizan características del proceso de digitalización en objetos virtuales, así como en objetos reales, realizando consideraciones para cada uno de los procesos, ya que principalmente en el escaneo de objetos reales. Los diferentes factores externos pueden provocar inconsistencias en la representación 3D final. El brillo del proyector es uno de los primeros factores que se consideran para su análisis, ya que este puede generar discontinuidades en el patrón de franjas, brillo irregular en la superficie del objeto, lo que hace el proceso de desdoblamiento de fase más complicado de resolver. Por ello, se propone una estrategia que permita reconstruir un objeto con un algoritmo de desdoblamiento de fase sencillo, analizando los parámetros en los dispositivos de la etapa de adquisición.Palabras Claves: Corrimiento de fase, desdoblamiento de fase, escaneo, perfilometría, reconstrucción. ANALYSIS OF THE PHASE SHIFT METHOD FOR SCANNING AND 3D RECONSTRUCTION OF OBJECTSAbstractThis paper shows the phase shifting method analysis, which one is used to the scan and 3D reconstruction. The analysis is focused on the 3-step algorithm and the goal characteristics about the 3D scan on virtual and real objects, we perform some considerations for each process because mainly at the 3D real objects scan.   There are a lot of external factors that can do non-uniform results at 3D final object, the bright from projector is the firstly factor considerate for the analysis and the same form the scene captured by de camera because the camera calibration processes are required. After the 3D scan results with simple phase unwrapping are showed.Keywords: Digitalize, phase shifting, phase unwrapping, profilometry, scanning

New Strategy to Approach the Inverse Kinematics Model for Manipulators with Rotational Joints

The chapter describes a new strategy to approach the solution of the inverse kinematics problem for robot manipulators. A method to determine a polynomial model approximation for the joints positions is described by applying the divided differences with a new point of view for lineal path in the end-effector of the robot manipulator. Results of the mathematical approach are analysed by obtaining the kinematics inverse model and the approximate model for lineal trajectories of a manipulator for three degrees of freedom. Finally, future research approaches are commented

DESARROLLO DE UN PROCESO DE AUTENTICACIÓN FACIAL EN UN SISTEMA ANDROID UTILIZANDO EL ALGORITMO LDA (ANÁLISIS DE DISCRIMINACIÓN LINEAL)

ResumenEn este trabajo de investigación se desarrolló un proceso de autenticación facial implementando primero los algoritmos PCA y LDA en una PC, evaluando sus respectivos desempeños en tiempo y nivel de autenticación con bases de datos públicas y posteriormente implementando el algoritmo LDA en una aplicación Android utilizando una base de datos propia donde las imágenes están bajo diferentes condiciones de iluminación, distancia, pose de la persona, fondo de la imagen, etc. Todo esto con el fin de seguir contribuyendo a los sistemas de reconocimiento y autenticación facial ya que esta área ha ido creciendo a lo largo de estas tres últimas décadas  y se aplica en diversas áreas como la seguridad, la interacción entre hombre y máquina, video juegos, etc. Este proceso de reconocimiento facial se divide a su vez en reconocimiento 1:n (reconocimiento facial) y reconocimiento 1:1 (autenticación facial).Palabras Claves: Autenticación, cara, LDA, PCA, visión por computadora. DEVELOPMENT OF A PROCESS OF FACIAL AUTHENTICATION IN AN ANDROID SYSTEM USING THE LDA ALGORITHM (LINEAR DISCRIMINANT ANALYSIS)AbstractIn this work, the facial authentication process was developed by first implementing the PCA and LDA algorithms in a PC, evaluating their performance in time and level of authentication in public databases and later implementing the algorithm LDA in an Android application using an own database where the images are under different conditions of illumination, distance, pose of the person, background of the image, etc. Everything in order to continue contributing to facial recognition and authentication systems as this area has been growing throughout these three decades and is applied in various areas such as security, the interaction between man and machine, video games, etc. This facial recognition process is once divided into 1: n recognition (facial recognition) and 1: 1 recognition (facial authentication).Keywords: Authentication, Computer Vision, Recognition, LDA, PCA

A 3D Sensor Based on a Profilometrical Approach

An improved method which considers the use of Fourier and wavelet transform based analysis to infer and extract 3D information from an object by fringe projection on it is presented. This method requires a single image which contains a sinusoidal white light fringe pattern projected on it, and this pattern has a known spatial frequency and its information is used to avoid any discontinuities in the fringes with high frequency. Several computer simulations and experiments have been carried out to verify the analysis. The comparison between numerical simulations and experiments has proved the validity of this proposed method

METODOLOGÍA PARA LA CORRECCIÓN DE DISTORSIÓN GEOMÉTRICA Y RECONSTRUCCIÓN 3D DE UN OBJETO MEDIANTE PERFILOMETRÍA WAVELET 1D

ResumenEl aceite lubricante, componente vital en máquinas rotatorias, al bajar su calidad se ve afectado el ciclo de vida del motor de sobremanera, y al no lubricarse, ese ciclo de vida es nulo. El presente proyecto pretende controlar un problema frecuente en la industria de transporte; la persistente contaminación del aceite. Para el adecuado mantenimiento, ahorro de energía y capital, se deben conocer las impurezas ligadas al aceite. Adicionalmente, el conocimiento del estado del lubricante y su futuro repuesto es importante para la prevención de fallas. Este trabajo exhibe los resultados del desarrollo de un sensor capacitivo para identificar las impurezas en aceite lubricante usado en motores diésel, presentando el comportamiento eléctrico del sensor expuesto al aceite y de los agentes externos tales como agua y glicol. Los experimentos consideran la temperatura y el volumen de impurezas en un aceite en estado puro y bajo contaminantes.Palabras Claves: Capacitivo, lubricante, sensor.METHODOLOGY FOR THE CORRECTION OF GEOMETRIC DISTORTION AND 3D RECONSTRUCTION OF AN OBJECT THROUGH WAVELET 1D PROFILOMETRYAbstractA vital component of rotary machines is the lubricating oil which quality significantly impacts on their life cycle. The present project aims to control a frequent problem in the transport industry; the persistent contamination of the oil and the lack of impurities detection on the motor lubricants. For proper maintenance, energy and capital savings, the impurities linked to the oil must be known. In addition, the status of the lubricant and its future replacement is important for failure prevention. This work presents the results of the development of a capacitive sensor to identify impurities in lubricating oil used in diesel engines, presenting the electric behavior of the sensor exposed to oil and external agents such as water and glycol. The experiments consider the temperature and the volume of impurities on both pure and contaminated oils.Keywords: Capacitive, lubricant, sensor

Clonal chromosomal mosaicism and loss of chromosome Y in elderly men increase vulnerability for SARS-CoV-2

The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, COVID-19) had an estimated overall case fatality ratio of 1.38% (pre-vaccination), being 53% higher in males and increasing exponentially with age. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, we found 133 cases (1.42%) with detectable clonal mosaicism for chromosome alterations (mCA) and 226 males (5.08%) with acquired loss of chromosome Y (LOY). Individuals with clonal mosaic events (mCA and/or LOY) showed a 54% increase in the risk of COVID-19 lethality. LOY is associated with transcriptomic biomarkers of immune dysfunction, pro-coagulation activity and cardiovascular risk. Interferon-induced genes involved in the initial immune response to SARS-CoV-2 are also down-regulated in LOY. Thus, mCA and LOY underlie at least part of the sex-biased severity and mortality of COVID-19 in aging patients. Given its potential therapeutic and prognostic relevance, evaluation of clonal mosaicism should be implemented as biomarker of COVID-19 severity in elderly people. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, individuals with clonal mosaic events (clonal mosaicism for chromosome alterations and/or loss of chromosome Y) showed an increased risk of COVID-19 lethality

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Libro de Proyectos Finales 2021 primer semestre

PregradoIngeniero CivilIngeniero de SistemasIngeniero ElectricistaIngeniero ElectrónicoIngeniero IndustrialIngeniero Mecánic

La evaluación colegiada de las competencias básicas en la Comunidad Autónoma de Canarias : hacia un modelo de escuela inclusiva y sostenible

Precede al título: Educación Primaria y Educación Secundaria ObligatoriaLa Ley Orgánica de Educación (LOE) introduce el concepto de «competencias básicas» como eje articulador del currículo, conectando de pleno con las reflexiones y las estrategias que se están desarrollando en otros sistemas educativos internacionales a la luz del informe Delors (1996), el documento DeSeCo (Definición y Selección de Competencias fundamentales) elaborado por la OCDE, de las evaluaciones PISA (Programa para la Evaluación Internacional del Alumnado), etc. Esta propuesta centra el foco en la dimensión formativa de la «evaluación», aspecto inacabado con la LOGSE (Ley Orgánica General del Sistema Educativo), a pesar de los esfuerzos realizados en esa dirección. Trabajar en las aulas para la consecución de las «competencias básicas» lleva ineludiblemente al problema de cómo evaluarlas de forma colegiada —cuando la propia ordenación del sistema educativo fragmenta cada una de las enseñanzas en diferentes áreas o materias— y de cómo emplear la información que proporciona esta labor para hacer valer el sentido formativo y regulador que debe tener la evaluación de las competencias básicas.Consejería de Educación y Universidades. Dirección General de Ordenación, Innovación y Promoción Educativa; Avda. Buenos Aires, 5; 38071 Tenerife; Tel. +34922592592; Fax +34922592570; [email protected]