874 research outputs found
Práctica de desarrollo de interfaces hardware/software para la monitorización del estado de un PC
Este artículo presenta una práctica laboratorio impartida
mediante una metodología de aprendizaje basado
en proyectos (ABP) [1] para dotar de la capacidad de
diseñar y desarrollar un monitor del estado de un
ordenador, integrado en un sistema empotrado que se
comunica con una aplicación de escritorio, a nuestros
alumnos de la asignatura de Diseño de Microcontroladores
(DM) en el contexto del Máster en Ingeniería
de Computadores y Redes.
Esta práctica abarca la comunicación Hardware/
Software entre un microcontrolador con un núcleo
Cortex-M4 y una aplicación software escrita en
lenguaje C# usando el entorno Visual Studio Community
2015 a través de puertos series virtuales
(VCP). Esta práctica está enfocada como un proyecto
que los alumnos han de ir realizando desde cero,
avanzando mediante la consecución de hitos, hasta
conseguir obtener un sistema final. El sistema a
desarrollar se divide en dos partes, por un lado tenemos
un PC con un sistema operativo de la familia
Windows, en el que se construye una aplicación
visual mediante Windows Forms, la cual obtiene
información del sistema de forma periódica y la envía
al microcontrolador mediante comandos usando el
puerto serie (USB o comunicación Bluetooth). Por
otro lado tenemos un microcontrolador de la familia
STM32 que dispone de un display LCD ejecutando
una plataforma completamente libre, .NET Micro
Framework, la cual recibe a través del puerto serie la
información obtenida gracias a la aplicación software
del PC y la muestra en la pantalla, obteniendo así una
herramienta de monitorización del PC sin tener que
estar conectado físicamente a éste.
El desarrollo de este tipo de proyectos se añade la
dificultad de la necesidad del uso de diferentes
herramientas para el desarrollo del firmware y del
software en paralelo, de manera incremental, y
enfocadas para ámbitos de uso muy distintos.
Esta práctica ha tenido una gran acogida por parte de los alumnos, ya que les ha servido de ejemplo del
desarrollo de firmware para un microcontrolador
usando la plataforma .NET MF y de su comunicación
con el PC por medio de una aplicación visual.This manuscript presents a practical laboratory session
imparted using a project-based learning methodology
(PBL) to provide the capacity of designing and
developing a computer status monitoring device,
integrated in an embedded system that communicates
with a desktop software tool, to our students in the
Computer Engineering Master’s Degree.
This practice session encompasses Hardware/
Software communication between a microcontroller
with a Cortex-M4 kernel and a desktop software
application through virtual COM ports (VCP)
written in C# using Visual Studio Community 2015.
This lab session is focused as a project that students
must be making from scratch by achieving and completing
some milestones to obtain a final functional
system. The project is divided into two different parts.
First, we have a Windows PC where a visual software
application that gathers information from the system
and sends it periodically to the microcontroller (USB
or Bluetooth) has to be built using Windows Forms.
On the other hand, we have a microcontroller from
the STM32 family that has a 2.4’ LCD display executing
.NET Micro Framework that receives the
information obtained from the PC through the serial
port and displays it in the screen. This way, students
create a computer status monitoring tool that does not
need to be connected physically to it to receive the
information.
The development of this project is added to the
need of using different tools for firmware and software
development, focused to very different fields of
use. This practice has been well received by the
students, because it has served as an example of the
firmware development for a microcontroller using the
.NET MF platform as well as the communication between the PC and the microcontroller using a visual
software application
Canonical Analysis of the Jackiw-Teitelboim Model in the Temporal Gauge. I. The Classical Theory
As a preparation for its quantization in the loop formalism, the
2-dimensional gravitation model of Jackiw and Teitelboim is analysed in the
classical canonical formalism. The dynamics is of pure constraints as it is
well-known. A partial gauge fixing of the temporal type being performed, the
resulting second class constraints are sorted out and the corresponding Dirac
bracket algebra is worked out. Dirac observables of this classical theory are
then calculated.Comment: 15 pages, Latex. Misprint correction
Novel Method for Wind Turbines Blades Damage Classification using Image Processing
Wind turbine generators are spreading around the world due to its advantages over fossil fuels. Structural monitoring of them is important to increase operation and reduce maintenance times. Visual inspection is highly influenced by the human factor due to the working conditions. Image processing supported by vision systems offers high advantages reducing times, being the software and processing algorithms, which generates added value. In this paper, a novel method for wind turbines blades damages analysis is presented using image processing and a classifier based on dimensional features. The image acquisition is performed using a reflex camera with a telephoto and geo-location enabled. The faults analyzed include cracks, edge erosion, and electric discharge
Novel Method for Wind Turbines Blades Damage Classification using Image Processing
75-79Wind turbine generators are spreading around the world due to its advantages over fossil fuels. Structural monitoring of them is important to increase operation and reduce maintenance times. Visual inspection is highly influenced by the human factor due to the working conditions. Image processing supported by vision systems offers high advantages reducing times, being the software and processing algorithms, which generates added value. In this paper, a novel method for wind turbines blades damages analysis is presented using image processing and a classifier based on dimensional features. The image acquisition is performed using a reflex camera with a telephoto and geo-location enabled. The faults analyzed include cracks, edge erosion, and electric discharge
Impact of the resignification of the research pedagogical practice and the curriculum of pedagogy degree of higher education institutions in Barranquilla-Colombia
Este trabajo tiene como objetivo indagar sobre cómo el graduado universitario de pedagogía asume desde el
ejercicio de su rol profesional la resignificación de la práctica pedagógica investigativa. Se evalúa el impacto
de los graduados del programa de Especialización en Estudios Pedagógicos de la Universidad de la Costa
(Colombia) durante el periodo 2014-2017, frente a la resignificación de la práctica pedagógica investigativa.
El estudio se fundamentó los preceptos y lineamentos planteados por el Consejo Nacional de Acreditación y
el proyecto Tuning. Se trabajó bajo un enfoque cuantitativo con una población de 247 egresados, utilizando
la técnica de la observación y el cuestionario de auto reporte como instrumento para la recolección de
información. El estudio muestra que el trabajo curricular desarrollado en el programa impacta positivamente el
desempeño de los egresados en el mercado laboral. Se evidencia así la pertinencia del programa en su
formación profesional y desempeño laboral al ajustarse los planes curriculares acorde a las necesidades
nacionales e internacionales.This work has the objective of investigating how the pedagogy university graduate assume, from the exercise
of his professional role, the resignification of the pedagogical research practice. The impact of graduates of
the Specialization Program in Pedagogical Studies of the University of the Coast during the 2014-2017 period,
on the resignification of the research pedagogical practice is evaluated. The study was based on the precepts
and guidelines proposed by the National Accreditation Council and the Tuning project. A quantitative approach
with a population of 247 graduates was considered, using the observation technique and the self-report
questionnaire as the instrument for gathering information. The study shows that the curricular work developed
in the program positively impacts the performance of graduates in the labor market. This demonstrates the
relevance of the program in their professional training and work performance by adjusting the curricular plans
according to national and international needs
Chronological reassessment of the Middle to Upper Paleolithic transition and Early Upper Paleolithic cultures in Cantabrian Spain
Abstract: Methodological advances in dating the Middle to Upper Paleolithic transition provide a better understanding of the replacement of local Neanderthal populations by Anatomically Modern Humans. Today we know that this replacement was not a single, pan-European event, but rather it took place at different times in different regions. Thus, local conditions could have played a role. Iberia represents a significant macro-region to study this process. Northern Atlantic Spain contains evidence of both Mousterian and Early Upper Paleolithic occupations, although most of them are not properly dated, thus hindering the chances of an adequate interpretation. Here we present 46 new radiocarbon dates conducted using ultrafiltration pre-treatment method of anthropogenically manipulated bones from 13 sites in the Cantabrian region containing Mousterian, Aurignacian and Gravettian levels, of which 30 are considered relevant. These dates, alongside previously reported ones, were integrated into a Bayesian age model to reconstruct an absolute timescale for the transitional period. According to it, the Mousterian disappeared in the region by 47.9?45.1ka cal BP, while the Châtelperronian lasted between 42.6k and 41.5ka cal BP. The Mousterian and Châtelperronian did not overlap, indicating that the latter might be either intrusive or an offshoot of the Mousterian. The new chronology also suggests that the Aurignacian appears between 43.3?40.5ka cal BP overlapping with the Châtelperronian, and ended around 34.6?33.1ka cal BP, after the Gravettian had already been established in the region. This evidence indicates that Neanderthals and AMH co-existed <1,000 years, with the caveat that no diagnostic human remains have been found with the latest Mousterian, Châtelperronian or earliest Aurignacian in Cantabrian Spain.This research has been supported by the European Commission through FP7-PEOPLE-2012-CIG (Ref: 322112), the Spanish Ministry of Economy and Competitiveness (HAR2012-33956 and RYC-2011-00695), Cantabria Campus International and University of Cantabria to ABMA. The Instituto Internacional de Investigaciones Prehistóricas de Cantabria is sponsored by the University of Cantabria, the Government of Cantabria and Banco Santander
Magnetic resonance microscopy and correlative histopathology of the infarcted heart
Altres ajuts:The present study was supported by the EU Joint Programming Initiative 'A Healthy Diet for a Healthy Life' (JPI HDHL INTIMIC-085), Generalitat Valenciana (GV/2018/116), INCLIVA and Universitat de Valencia (program VLC-BIOCLINIC 20-nanomIRM-2016A).Delayed enhancement cardiovascular magnetic resonance (MR) is the gold-standard for non-invasive assessment after myocardial infarction (MI). MR microscopy (MRM) provides a level of detail comparable to the macro objective of light microscopy. We used MRM and correlative histopathology to identify infarct and remote tissue in contrast agent-free multi-sequence MRM in swine MI hearts. One control group (n = 3 swine) and two experimental MI groups were formed: 90 min of ischemia followed by 1 week (acute MI = 6 swine) or 1 month (chronic MI = 5 swine) reperfusion. Representative samples of each heart were analysed by contrast agent-free multi-sequence (T1-weighting, T2-weighting, T2*-weighting, T2-mapping, and T2*-mapping). MRM was performed in a 14-Tesla vertical axis imager (Bruker-AVANCE 600 system). Images from MRM and the corresponding histopathological stained samples revealed differences in signal intensities between infarct and remote areas in both MI groups (p-value < 0.001). The multivariable models allowed us to precisely classify regions of interest (acute MI: specificity 92% and sensitivity 80%; chronic MI: specificity 100% and sensitivity 98%). Probabilistic maps based on MRM images clearly delineated the infarcted regions. As a proof of concept, these results illustrate the potential of MRM with correlative histopathology as a platform for exploring novel contrast agent-free MR biomarkers after MI
Web-based monitoring tools for Resistive Plate Chambers in the CMS experiment at CERN
The Resistive Plate Chambers (RPC) are used in the CMS experiment at the trigger level and also in the standard offline muon reconstruction. In order to guarantee the quality of the data collected and to monitor online the detector performance, a set of tools has been developed in CMS which is heavily used in the RPC system. The Web-based monitoring (WBM) is a set of java servlets that allows users to check the performance of the hardware during data taking, providing distributions and history plots of all the parameters. The functionalities of the RPC WBM monitoring tools are presented along with studies of the detector performance as a function of growing luminosity and environmental conditions that are tracked over time
Radiation background with the CMS RPCs at the LHC
The Resistive Plate Chambers (RPCs) are employed in the CMS Experiment at the LHC as dedicated trigger system both in the barrel and in the endcap. This article presents results of the radiation background measurements performed with the 2011 and 2012 proton-proton collision data collected by CMS. Emphasis is given to the measurements of the background distribution inside the RPCs. The expected background rates during the future running of the LHC are estimated both from extrapolated measurements and from simulation
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