vgaraujov/thesis-chile huggingface dataset:
CARACTERIZACIÓN DE LA GANANCIA POR DIVERSIDAD ANGULAR DE ANTENAS DIRECTIVAS PARA ENLACES EXTERIOR-EXTERIOR EN AMBIENTESURBANOS

Este trabajo presenta una comparación empírica de la efectividad de sistemas dediversidad angular y espacial para enlaces inalámbricos fijos de exterior a exterior. Elanálisis se centra principalmente en el desempeño de aquellos sistemas de diversidadcon sólo una cadena de RF. Los resultados muestran que para tales sistemas aquelloscon diversidad angular superan con creces en desempeño a los espaciales por al menos4 [dB] al utilizar arreglos de características comparables. Este estudio es realizado parasistemas angulares con tres órdenes distintos de diversidad, 5, 12 y 20. Se observa undeterioro cercano a los 2 [dB] al ser comparados con el combinador de razón máxima(MRC) correspondiente al sistema óptimo. Esto se compara favorablemente con diversidadespacial donde el deterioro llega a los 10 [dB] para un orden de diversidad de 20.Con el fin de establecer una referencia que permita explicar los resultados observadosse utiliza un modelo de desvanecimientos Rice que incluye los efectos de correlaciónde antena. Entre los resultados se observa que este modelo se ajusta de manera adecuadaa los datos empíricos y permite predecir el desempeño de los distintos sistemas dediversidad presentados.
 This work presents an empirically based comparison of the effectiveness of angularand spatial diversity systems for outdoor to outdoor fixed wireless links. The analysisis focused on the performance of systems with only one RF chain. The results showthat angular diversity outperforms spatial diversity systems by at least 4 [dB] whenusing arrays with comparable dimensions. This study is performed for angular diversitysystems with three different orders, 5, 12 and 20. A performance loss of 2 [dB]was observed when comparing with the optimum maximum ratio combiner (MRC). Incontrast a spatial diversity system of order 20 has a performance loss of around 10 [dB].In order to provide a reference for the observed results, a simple Ricean fading modelincluding antenna correlation effects is simulated. This model is found to fit very wellthe main results and then can be used to predict the performance of the different kindof systems analized.
DESARROLLO DE UNA APLICACIÓN PARA DISPOSITIVOS CON SISTEMA OPERATIVO ANDROID, ORIENTADA A DISMINUIR LA INCERTIDUMBRE EN LA MOVILIDAD DEL CIUDADANO

Esta memoria trata sobre el desarrollo de una aplicación para dispositivos móviles, como solución al desafío presentado por la organización Unidad de Ciudades Inteligentes de la Subsecretaría de Transportes, en el marco del nuevo Piloto de Memorias Multidisciplinarias, proyecto MECESUP “Fortalecimiento del desarrollo de competencias transversales en la formación profesional UTFSM”.Como objetivo se tiene disminuir la incertidumbre del ciudadano en cuanto a su movilidad, entregando información relevante, integral y confiable en todo momento, complementando la plataforma web de la iniciativa transporTeinforma de la Subsecretaría de Transportes para aportar al desarrollo de ciudades más inteligentes, en este caso en la Región de Valparaíso.
 The present project is about the development of an app for mobile devices with Android operating system, as the solution to the challenge presented by the Smart City Unit of the Transport Ministry of Chile, within the experimental multidisciplinary thesis framework of the MECESUP project known as “Reinforcement of the Development of Transversal Skills in the professional formation at UTFSM”.The app main objectives are to decrease the citizens’ uncertainty regarding their mobility, delivering relevant, integral and reliable information at all time; and complement the web service of the Transport Ministry’s initiative called “transporTeinforma” for the development of smarter cities, in this case only considering the Valparaíso region.
IDENTIFICATION AND CONTROL METHODS UTILIZING RANK AND CARDINALITY OPTIMIZATION APPROACH

This Thesis addresses a class of optimization problems that can be found in severalareas, such as system identi cation and control. Particularly, these problems are formulatedby using rank and cardinality constraints in order to obtain low rank matrices orinduce sparsity of the solution.Rank-constrained optimization problems are found in control and system identi cation.Low-order controller design problems are well known examples where the formulationutilizes Linear Matrix Inequalities (LMIs) and rank constraints over matrices forbounding the controller's order and closed loop stability degree.Promotion of sparsity in identi cation and control problems can bring many practicaladvantages in the nal solution. In model selection, by formulating the identi cationproblem with a cardinality (`0-norm) constraint over the parameter vector, a simpli edor speci c structure of the model can be obtained. In control applications sparsity canbe induced on the solution of an optimal control problem, thus limiting the number ofactive actuators at each time step.Although low-rank and sparsity are desirable characteristics in the solution of manyproblems of interest, solving these type of problems poses computational diculties.Many approaches that rely on approximations and speci c tailored solutions are availablein the literature in order to overcome the inherent complexity of the problem. However, in this work a novel rank-constraint representation is used which, aims to solve (not anapproximation but) a problem that is equivalent to the original in the sense that theyboth have the same global optimum. The resulting problem can also be solved usingstandard nonlinear programming tools.The work hereby presented is divided in three main parts. First, an overview of stateof-the art techniques for solving cardinality and rank-constrained problems is shown.The second part of the thesis presents optimization problems with cardinality constraintsin the eld of model selection, parameter estimation and optimal control.The third part of the thesis addresses a rank-constrained optimization problem whendesigning a low-order controller with prescribed degree of stability. The formulation ofthis problem includes LMI and rank constraints.
ANÁLISIS DE TENDENCIAS EN ELECCIONES PRESIDENCIALES EN CHILE BASADO EN REDES SOCIALES"

Las redes sociales son una parte importante de la sociedad actual, permitiendorelacionar a las personas en múltiples aristas. Varias de estas redes sociales permiten obtener una gran cantidad de informacion, con la particularidad de permitir realizar estudios y analisis. Una buena manera de trabajar con esta información consiste en realizar análisis de redes, identi cando en estos análisis patrones y tendencias.La fi nalidad de este estudio es exponer como los análisis de redes, a travésde varias técnicas, pueden refejar lo que está ocurriendo en la realidad. Tambiénse expondrá, mediante varias herramientas de visualización, una forma más práctica para poder interpretar la información obtenida, después de ser procesada. Por último, se de finen conclusiones que pueden ayudar a futuros estudios similares a tener una visión más amplia en análisis relacionados.
 Social networks are an important part of today's society, making it possible to relatepeople on multiple edges. Several of these social networks allow to obtain a greatamount of information, with the particularity of allowing to carry out studies andanalysis. A good way to work with this information is to perform network analysis,identifying in these analyzes patterns and trends. The purpose of this study is to explain how network analysis, through various techniques, can reflect what is happening in reality. It will also be exposed, through various visualization tools, a more practical way to interpret the information obtained, after being processed. Finally, we de ne conclusions that may help future similar studies to have a broader view in related analyzes.
MODELADO Y CONTROL DE SISTEMA DE ÓPTICA ADAPTATIVA SUJETO A VIBRACIONES

The Adaptive Optics technology, implemented in dierent optical applications, is anelementary component in modern ground-based astronomical systems. It provides correctionof aberrations induced by atmospheric turbulence on the beam of light from a celestial body.Thus, it is possible to improve the resolution of scienti c images.The object of study of this Thesis is the MagAO system (6.5m Magellan Telescope AdaptiveOptics), implemented on the Clay Telescope, located at Las Campanas Observatory.Unfortunately, the data obtained by adaptive optics systems, such as MagAO, is altered notonly by atmospheric turbulence, but also by inherent vibrations of the system and additionalvibrations caused by instrumentation elements.Currently, the inuence of vibrations in the images obtained by MagAO is small and isusually neglected. However, in future astronomical projects, it is essential to identify thesevibrations, its nature, magnitude, and mitigation.In this Thesis, power spectral densities are obtained from data captured during astronomicalobservation sessions, to learn how the MagAO system is aected by vibrations. Thisanalysis allows to identify and measure the inuence of the system instruments operatingin MagAO.Based on the spectral analysis of captured data, mathematical models are obtained, todescribe the system and its vibrations. For this process, a standard AO loop is used, takinginto account perturbations induced by turbulence and vibrations, to obtain a linear modelfor MagAO.Finally, the model obtained allows us to propose improvements for the AO loop, throughthe design of control alternatives. The system performance for these controllers is analysedthrough simulations.
EFECTO DEL MÍNIMO TÉCNICO DE UNIDADES GENERADORAS EN EL CÁLCULO DEL COSTO MARGINAL DE CORTO PLAZO SOBRE LA SEÑAL DE INVERSIÓN DE LARGO PLAZO

The present work will study long-term capacity expansion planning when restrictionsin the short-term operation of the system are considered focusing on minimum stable level(MSL) constraints.The relevance of the analysis is linked to the revenues of current conventional powerplants that are operating at MSL conditions. This condition implies that these units mayoperate above the marginal cost of the electrical power system. From the optimal economicpoint of view, this strategy is inecient due to the place that they have in the order meritlist associated with the dispatch process.Certainly, the situation described above will aect the cost of the system and thereforea speci c entity will have to pay for the de cit to ensure payments for the operation ofthe units.Including MSL constraints of thermal generators in GCEP adds a number of integervariables to the mathematical formulation, wich can slow signi cantly its resolution. Thus,most GCEP models tend to ignore them. Rising penetration of variable renewable generationcan make this omission unadvisable. In order to analyze the investment signals withand without modeling technical minima of fossil-fuel generators (MSL), three simulationcases are considered.The rst set of simulations aims to nd dierences in the amount of installed capacityby technology, with and without considering MSL constraints.The purpose of this simulationis testing the idea that pure marginal theory is valid only for economically adaptedsystems. Thus, investment decisions will be continuous and simulations will be conductedin a single-node small test system with three types of generator and with a decision horizonof only one year and 6 load blocks per year.The second set of simulations will try to identify dierences for the investment timingfor a portfolio of available technology, considering an economically adapted system withand without considering MSL constraints. As the system will be economically adapted,unlike the rst set of simulations all investments will be forced. Thus, the dierences willbe given only by the year in which the investments occur and the fact that the investmentdecisiones are discrete. Simulations will be conducted for a single-node test system withthree dierent types of generators and a 15-year horizon.Finally, the third case will analyze the distortion of investment signals, consideringboth MSL and minimum operation time constraints. These simulations will be conductedon a modi ed SING system, considering transmission and a 15-year horizon. Two modelswill be simulated in this case. A classical model of capacity expansion planning consideringLDC decomposition will be compared against a chronological one.
REDISEÑO DEL BANCO DE ENSAYOS DE BOMBAS CENTRÍFUGAS DEL LABORATORIO DE TERMOFLUIDOS, CON MONITOREO EXTERNO DE VARIABLES

En este trabajo de título se diseña un laboratorio de prueba de bombas centrifugas para ser implementado en dependencias del laboratorio de termofluidos del departamento de Ingeniería Mecánica de la Universidad Técnica Federico Santa María, Valparaíso, Chile.El laboratorio ha sido configurado para testear dos bombas, con capacidad para conectarse en serie, paralelo. La instalación cuenta con accesorios que permiten el rápido cambio de bomba a testear.Se analiza la base teórica y funcionamiento de las bombas, considerando las normas internacionales que regulan los bancos de ensayos de bombas hidráulicas. Para cumplir con la norma ISO 9906, se detallan las partes, componentes y geometrías críticas de este laboratorio y se incluyen planos para fabricar las piezas.Los sistemas de control y automatización facilitan la ejecución de las pruebas a las bombas. Se hace un estudio sobre los costos y capacidades de los sistemas de control tradicional, específicamente sistemas SCADA, y se propone un modelo de control basado en la placa Arduino, con sus limitaciones.
 In this title work, a centrifugal water pump test laboratory is designed in order to be implemented in the thermofluids laboratory of the mechanical engineering departament of the Federico Santa María Technical University, Valparaiso, Chile.The laboratory has been set up to test pumps, with capacity to be connected in serial or parallel. Also has accessories that make faster the pump interchange.The theoretical basis and operation of the pumps is analyzed, considering international standards that regulate hydraulic pumps test banks. In order to comply with ISO 9906 standard; parts, components and critical geometries of this laboratory are detailed and drawings are included to manufacture the parts.The control and automation systems facilitate the execution of the pump's tests. A study about the cost and capabilities of the traditional control systems, specifically SCADA systems, and a control model is proposed, based on the Arduino Board, with its limitations.
OPTIMIZACIÓN DE LA RUTA DE FABRICACIÓN DE UN PRODUCTO EN UNA RED-PLATAFORMA DE PYMES USANDO ALGORITMOS GENÉTICOS

El presente trabajo de titulación consiste en proponer como solución, un modelo de optimización meta-heurística basada en Algoritmos Genéticos, para la problemática de generar una ruta de fabricación y encontrar la mejor red activa para un pedido en una red-plataforma de PYMEs manufactureras. El modelo propuesto, optimiza los criterios correspondientes a costos y tiempos para la elaboración del producto, además considera los conceptos de cooperación-confianza entre empresas y especialización de cada una, como dos criterios adicionales.Para abordar el problema, se definen las variables más importantes que representen a la red-plataforma de PYMEs y al pedido del proyecto en la etapa de modelamiento lógico. El algoritmo implementado se desarrolla con la ayuda del Toolbox de Optimización MATLAB y el ingreso de datos se vincula a un archivo de extensión Excel.Para analizar el desempeño de la ejecución del AG propuesto, se realizaron tres procedimientos y se concluye que el modelo satisface distintas condiciones del programador, arrojando soluciones óptimas a cada problemática. El presupuesto y el tiempo de plazo del pedido es un factor determinante para obtener una red activa con mayores indicadores de cooperación y especialidad. Finalmente, el uso correcto del algoritmo depende de una buena planificación en la etapa del modelamiento lógico del pedido, acorde con las actividades que ofrece la red-plataforma de PYMEs.
 The purpose of this study is to provide a solution for critical fabrication routes and finding the best active network in a net-platform of small and mid size companies by using meta-heuristic optimizations through genetic algorithms. The model proposed in this study optimizes all the criterions regarding time and costs of manufacturing. It also considers concepts of cooperation-trust between companies and specialization as two additional criterions.To face the problem, the most important variables of the net-platform and the product are defined in the logic modeling stage. The implemented algorithm is developed with the MATLAB Optimization ToolBox and the data input is linked to an Excel file.To analyze the performance of the proposed genetic algorithm, three procedures were made. All of them correctly satisfied all the conditions made by the programmer, obtaining optimal solutions. The budget and delivery time are key factors to obtain an active network with better cooperation and specialization. Finally, the correct use of the algorithm is done after doing a good planning in the logic-modeling stage, in accordance with the activities offered by the net-platform of companies.
ESTUDIO NUMÉRICO DE LA PROPIEDADE DE AMORTIGUACION DE VIBRACIONES EN ESPUMAS METÁLICAS EN BASE A LA ALECIÓN CON MEMORIA DE FORMA CUALBE PARA DISPOSITIVOS LIVIANOS DE DISIPACIÓN DE ENERGIA"

En este trabajo se presenta una metodología capaz de caracterizar numéricamente las propiedades mecánicas de una espuma de aleación con memoria de forma (SMA), en particular se estudia las capacidades de amortiguamiento de la aleación CuALBe para diferentes amplitudes y frecuencias.Los modelos de espumas utilizados en este trabajo tienen como porcentaje de porosidad 29,74%, 31,11%, 32,68%, 39,93% y 51,37%. Para evaluar las espumas y sus propiedades de SMA se usa el método de elementos finitos (MEF) por medio del software ANSYS 16.1Este trabajo arroja como resultado que es posible evaluar un dispositivo liviano de disipación energía y estimar las propiedades mecánicas de la espuma CuALBe. Las conclusiones señalan mejoras en las capacidades de amortiguación en la aleación CuAlBe al generar espumas con estos materiales. En promedio el MEF muestra que la cantidad de porosidad óptima donde la capacidad de disipación de energía mecánica tiene resultados concluyentes para seguir con trabajos experimentales, es en espumas cercanas al 30%.
 This paper presents a numerical methodology to characterize the mechanical properties of foam shape memory alloy (SMA), In particular it studies the damping capabilities CuALBe alloy to different amplitudes and frequencies studied.The foam models used in this work are as a percentage of porosity 29.74%, 31.11%, 32.68%, 39.93% and 51.37%. To evaluate the foam properties of SMA and the finite element method (FEM) is used ANSYS 16.1 software.The results of this work say that is possible to evaluate lightweight device power dissipation and estimate the mechanical properties of the foam CuAlBe. The findings indicate improved damping capabilities alloy CuAlBe to generate foams with these materials. The average of MEF shows that the optimum amount of porosity where the dissipation of mechanical energy is conclusive results to continue experimental analysis, foams is close to 30%.
DISEÑO DE PLAN DE MANTENIMIENTO BASADO EN RIESGO PARA PLANTA DE TRATAMIENTO DE RESIDUOS SÓLIDOS Y LÍQUIDOS

En este estudio se presenta el proceso de diseño de un plan de Mantenimiento Basado enRiesgo (MBR) que se realizo para la planta de tratamiento de residuos sólidos y líquidosHidronor. Para su elaboración se considero una campaña de captura de datos del desempeñooperativo del parque de activos de la planta con el fin de identificar los principales riesgosasociados a la operación , y a su vez los equipos cuyas fallas generan estas situaciones dealto riesgo.Su implementación involucró la identificación de los riesgos, su evaluación comparativa(priorización de riesgos) y la planificación de las acciones que permitirán mantener bajocontrol los riesgos asociados a las fallas de los equipos.Se identificaron 23 equipos críticos de un total de 89 equipos operativos, los cuales poseen171 modos de fallas dominantes. Para mitigar las consecuencias generadas por estos modosde fallas se proponen 116 tareas de mantenimiento que resguardan la seguridad delpersonal, la integridad del medio ambiente, la calidad de los servicios de tratamiento y laoperatividad de la Planta.La distribución de tareas que propone el plan contiene un 56% de tareas de inspección ybúsqueda de fallas, 25% de tareas de sustitución y reacondicionamiento, 13%mantenimiento correctivo, 5% mantenimiento en base a condición y un 1% de rediseños.La factibilidad técnica para la realización de las tareas fue analizada por el grupo demantenedores de la Planta.Una vez que este plan entre en operación, Hidronor podrá hacer un uso eficiente y rentablede sus activos a travez del control de riesgo que estos tienen asociados.
 Risk-based Maintenance (RBM), has been one of the most used maintenance strategies since 1990.In this study, RBM was applied to a waste treatment plan Hidronor located at Pudahuel Santiago-Chile in the framework of improve current maintenance plan which is based mainly onrecommendations supplied by the manufacture of equipments.First, a risk assessment was performed to a total of 89 operational equipments by using FailureMode and Effects and Criticality Analysis (FMECA). From risk analysis they were identified 23critical equipments having 171 dominant failure mode.Second, to mitigate the consequences generated by these failure mode it is proposed 116maintenance task considering safety, environment integrity and the quality of the service providedto customers.Finally the results of this study propose a new maintenance plan which consider 56% of inspectionsand fault finding, 25% replacement and refurbishment, 13% corrective maintenance, 5%maintenance based on condition and 1% of redesign, all this task using the existing workforce.