Advances in the Analysis of Properties Behaviour of Cement-Based Grouts with High Substitution of Cement with Blast Furnace Slags

This article presents a study of the main properties (consistency, workability, leaching, unsoundness, and mechanical properties) of cement grouts prepared with cement replacement by blast furnace slag (GGBS). Mixtures have been analyzed in the absence of additives and reached high replacement percentages. As shown in the different tests presented, the observed evolution of the resistance and workability of the mixtures makes them very interesting for its application. Different types of cement (CEM-I 42.5 and CEM-I 52.5 R) and different water/binder values (1 and 0.67) are used. The results present opportunities for the steel industry by the intensive valorization of slag waste. The reduction of the use of cement in construction is also one of the key aims of this line of research. Results show improvements in the mechanical response with good fresh state properties for substitution percentages up to 70%. It is verified with leaching analysis that these products have less impact on the environmen

Metodología para determinar la turbiedad en el agua utilizando imágenes digitales

Este proyecto se centra en el análisis de la turbidez del agua a través de técnicas de procesamiento de imágenes. Se inicia con la recopilación y anotación de una base de datos compuesta por 690 imágenes. Posteriormente, se aplica un proceso de aumento artificial para enriquecer la base de datos y se lleva a cabo una normalización para homogeneizar las características de las imágenes. El análisis neural se realiza mediante la implementación de la arquitectura ResNet-50, dividida en dos componentes: el modelo ResNet50 y una capa completamente conectada. La base de datos se divide equitativamente en conjuntos de entrenamiento y validación. Este enfoque busca optimizar la precisión del modelo en la clasificación de la turbidez del agua a partir de imágenes capturadasThe project revolves around the analysis of water turbidity through image processing techniques. It commences with the collection and annotation of a database consisting of 690 images. Subsequently, an artificial augmentation process is applied to enrich the database, followed by a normalization step to standardize image characteristics. Neural analysis is conducted through the implementation of the ResNet-50 architecture, segmented into two components: the ResNet50 model and a fully connected layer. The database is evenly divided into training and validation set. This approach aims to optimize the model's accuracy in classifying water turbidity based on captured images.MaestríaMagíster en Ingeniería MecánicaCONTENIDO pág. 1. INTRODUCCIÓN 13 2. ESTADO DEL ARTE 18 3. BASE DE DATOS 21 3.1. Base de datos Basadas en Imágenes . . . . . . . . . . . . . . . . . . . . 21 3.2. Construcción de la Base de Datos . . . . . . . . . . . . . . . . . . . . . 22 3.2.1. Software para Etiquetado de Datos . . . . . . . . . . . . . . . . 25 4. MODELOS MATEMÁTICOS EN APRENDIZAJE MAQUINA 35 4.1. Regresión lineal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 4.2. Árboles de decisión . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 4.3. Bosques aleatorios (Random Forest) . . . . . . . . . . . . . . . . . . . . 40 4.4. Máquinas de vectores de soporte (SVM) . . . . . . . . . . . . . . . . . 41 4.5. Redes Neuronales Artificiales . . . . . . . . . . . . . . . . . . . . . . . . 43 4.5.1. Redes Neuronales Convolucionales (CNN) . . . . . . . . . . . . 45 4.5.2. Redes Neuronales Recurrentes (RNN) . . . . . . . . . . . . . . . 46 4.5.3. Redes Neuronales Generativas Adversarias (GAN) . . . . . . . . 47 4.6. K-Means . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 5. Visión por Computador 52 5.1. Redes Neuronales Profundas como Autoencoders . . . . . . . . . . . . . 53 2 6. Clasificación de Turbiedad 54 6.1. Selección del Modelo de Aprendizaje . . . . . . . . . . . . . . . . . . . 54 6.2. Selección del Modelo de Red Neuronal . . . . . . . . . . . . . . . . . . 59 6.2.1. ResNet-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 6.3. Desarrollo del Algoritmo de Aprendizaje . . . . . . . . . . . . . . . . . 61 7. Resultados 77 7.1. Matriz de Confusión . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 8. Implementación Sobre Sistemas Hidráulicos 85 8.1. Ejemplos de aplicación . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 8.1.1. Control de calidad del agua potable . . . . . . . . . . . . . . . . 88 8.1.2. Monitoreo de cuerpos de agua naturales . . . . . . . . . . . . . 89 8.1.3. Control de sistemas hidráulicos industriales . . . . . . . . . . . . 90 8.1.4. Monitoreo de aguas residuales . . . . . . . . . . . . . . . . . . . 92 8.1.5. Investigación científica en oceanografía . . . . . . . . . . . . . . 93 9. Conclusiones 95 BIBLIOGRAFÍA 9

Renormalization Group Flow of the Holst Action

The renormalization group (RG) properties of quantum gravity are explored, using the vielbein and the spin connection as the fundamental field variables. The scale dependent effective action is required to be invariant both under space time diffeomorphisms and local frame rotations. The nonperturbative RG equation is solved explicitly on the truncated theory space defined by a three parameter family of Holst-type actions which involve a running Immirzi parameter. We find evidence for the existence of an asymptotically safe fundamental theory, probably inequivalent to metric quantum gravity constructed in the same way.Comment: 5 pages, 1 figur

Coupled path and motion planning for a rover-manipulator system

This paper introduces a motion planning strategy aimed at the coordination of a rover and manipulator. The main purpose is to fetch samples of scientific interest that could be placed on difficult locations, requiring to maximize the workspace of the combined system. In order to validate this strategy, a simulation environment has been built, based on the VORTEX Studio platform. A virtual model of the ExoTer rover prototype, owned by the European Space Agency, has been used together with the same robot control software. Finally, we show in this paper the benefits of validating the proposed strategy on simulation, prior to its future use on the real experimental rover.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

On the multiplicity of ALMA Compact Array counterparts of far-infrared bright quasars

We present ALMA Atacama Compact Array (ACA) 870 micron continuum maps of 28 infrared-bright SDSS quasars with Herschel/SPIRE detections at redshifts 2-4, the largest such sample ever observed with ALMA. The ACA detections are centred on the SDSS coordinates to within 1 arcsec for about 80 per cent of the sample. Larger offsets indicate that the far-infrared (FIR) emission detected by Herschel might come from a companion source. The majority of the objects (about 70 per cent) have unique ACA counterparts within the SPIRE beam down to 3-4 arcsec resolution. Only 30 per cent of the sample shows clear evidence for multiple sources with secondary counterparts contributing to the total 870 micron flux within the SPIRE beam to at least 25 per cent. We discuss the limitations of the data based on simulated pairs of point-like sources at the resolution of the ACA and present an extensive comparison of our findings with recent works on the multiplicities of sub-millimetre galaxies. We conclude that, despite the coarse resolution of the ACA, our data support the idea that, for a large fraction of FIR-bright quasars, the sub-mm emission comes from single sources. Our results suggest that, on average, optically bright quasars with strong FIR emission are not triggered by early-stage mergers but are, instead, together with their associated star formation rates, the outcome of either late-stage mergers or secular processes.Comment: 16 pages, 10 figure

Actualización pedagógica y desempeño docente de educación secundaria en la I.E. N° 88039 "Javier Heraud" 2016

El presente trabajo de investigación tuvo como propósito determinar la relación entre la actualización pedagógica y el desempeño de los docentes en educación secundaria. Para ello se empleó el tipo de investigación descriptiva correlacional con diseño no experimental-transversal. Además se utilizó como técnica de recolección de datos la encuesta y como instrumento derivado de ello el cuestionario a una población muestral de 28 docentes. Entre los resultados encontrados tenemos: en la variable actualización pedagógica se encontró en un nivel regular, afirmado por un 87.7%, respecto al desempeño docente se obtuvo un nivel regular con tendencia positiva a percepción de un 85.7%, por último, se pudo constatar que existía relación entre las variables, significativa al 5%.Tesi

Histopathological reaction in the vestibule after cochlear implantation in Macaca fascicularis.

Cochlear implantation surgery (CI) is considered a safe procedure and is the standard treatment for the auditory rehabilitation in patients with severe-to-profound sensorineural hearing loss. Although the development of minimally traumatic surgical concepts (MTSC) have enabled the preservation of residual hearing after the implantation, there is scarce literature regarding the vestibular affection following MTCS. The aim of the study is to analyze histopathologic changes in the vestibule after CI in an animal model (Macaca fascicularis). Cochlear implantation was performed successfully in 14 ears following MTCS. They were classified in two groups upon type of electrode array used. Group A (n = 6) with a FLEX 28 electrode array and Group B (n = 8) with HL14 array. A 6-month follow-up was carried out with periodic objective auditory testing. After their sacrifice, histological processing and subsequent analysis was carried out. Intracochlear findings, vestibular presence of fibrosis, obliteration or collapse is analyzed. Saccule and utricle dimensions and neuroepithelium width is measured. Cochlear implantation was performed successfully in all 14 ears through a round window approach. Mean angle of insertion was >270◦ for group A and 180–270◦ for group B. In group A auditory deterioration was observed in Mf 1A, Mf2A and Mf5A with histopathological signs of scala tympani ossification, saccule collapse (Mf1A and Mf2A) and cochlear aqueduct obliteration (Mf5A). Besides, signs of endolymphatic sinus dilatation was seen for Mf2B and Mf5A. Regarding group B, no auditory deterioration was observed. Histopathological signs of endolymphatic sinus dilatation were seen in Mf 2B and Mf 8B. In conclusion, the risk of histological damage of the vestibular organs following minimally traumatic surgical concepts and the soft surgery principles is very low. CI surgery is a safe procedure and it can be done preserving the vestibular structures

Temblor ortostático como causa de inestabilidad

Orthostatic tremor (OT) is a neurological disease of unknown aetiology. It is defined by the presence of a 10-20 Hz tremor in the legs while standing still. Symptoms described are dizziness and instability that diminish if the patient sits down or leans on something; drinking small amounts of alcohol significantly reduces OT. Due to the dizziness and/or unsteadiness, these patients are usually referred to the neuro-otology department. We report 4 cases diagnosed with OT. The diagnosis of OT should be considered for patients with instability. The clinical history is a key factor to suspect this entity, and the diagnosis is given by the register of 10-20 Hz contractions on limb electromyography. Treatment for this disease consists of medical treatment; the first option is clonazepam. © 2011 Elsevier España, S.L. All rights reserved

Portable Epidemiological Isolation Unit. Ephemeral Architecture for Covid-19 Emergency

In response to the COVID-19 global pandemic, the Colombian Ministry of Science and Technology launched the call for research proposals MinCienciatón. The call invited researchers in different fields, including epidemiology and biomedical design, to present solutions that help mitigate the health emergency produced by the fast spread of the virus worldwide. Among other subjects of interest, the call encouraged researchers to present ideas for the isolation of infected patients and the protection of medical staff. In this context, the LAB[1] was selected to design and produce a Portable Epidemiological Isolation Unit. Product of the laboratory’s research in polyhedral geometry and ephemeral architecture, we designed a pneumatic structure which permits the treatment of infected patients in aseptic and well ventilated spaces – as well as the isolation of medical staff and equipment. In the event that the health system becomes saturated, the Portable Epidemiological Isolation Unit will allow the sanitary authorities to expand its hospital capacity when needed. It will also permit the installation of field hospitals in isolated areas of the national territory that do not count with the necessary infrastructure to cope with the sanitary crisis. [1] In compliance with the blind evaluation policy of the journal, this proposal does not mention the name of the laboratory in question nor its institutional bond

Elucidating pyrolysis oil oligomeric chemical structures: Experimental studies and DFT calculations

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