Ciencias Exactas y Ciencias de la Salud
Permanent URI for this collectionhttps://hdl.handle.net/11285/551039
Pertenecen a esta colección Tesis y Trabajos de grado de las Maestrías correspondientes a las Escuelas de Ingeniería y Ciencias así como a Medicina y Ciencias de la Salud.
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- Advanced control strategies for small wind turbine MPPT and stress reduction(2017-12-05) Garcia Vera, Marco Antonio; Probst Oleszewski, Oliver Matthias; Favela Contreras, Antonio; Vargas Martínez, AdrianaThis thesis demonstrates the functionality of a single-input single-output adaptive predictive control(APC) strategy , focused on power tracking and stress reduction. A modified recursive least squares algorithm was designed to improve the adaptive mechanism and eliminate poor sensitivity malfunctions and a estimator wind up problem. The real implementation of the modification shows a high improvement in the adaptive mechanism’s reliability and the certainty of its estimations. An objective function that combines stress and power was designed and tested. Results indicate that the function achieves an important stress reduction with a slight decrement on power, therefore, validating the design. The performance of the APC and a proportional, integral and derivate (PID) controller following the objetive function under different conditions was analyzed and compared. The system was tested under a constant and a variable wind input with different configurations i.e. a wind series with gust or no presence and with a high or low turbulence with possible wind mean speed values of 6 m/s and 8 m/s.Experimental results show the APC’s tracking error in power, stress and voltage is significantly lower than the one obtained using the PID controller. The variable wind speed ws achieved using a LabVIEW application that sends information to an Arduino Due microcontroller that executes the control algorithms.
- STREM-1 based sepsis detection with centrifugal microfluidics incorporating active valves and image analysis(2017-11-17) Medrano Danés, Jonathan; Martinez Chapa, Sergio Omar; Mehdi Aeinehvand, Mohammad; Dieck Assad, Graciano; Martins Fernandes, Rute FabianaSepsis is the main cause of neonate death in hospitals. According to WHO, around one million neonatal deaths are caused each year because of sepsis. Rapid and early sepsis detection, are necessary for effective treatment of the patients to reduce the mortality rate, however this is still a big challenge, especially in low income countries with a poor healthcare system. Recently, soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) biomarker has showed to be an accurate indicator for sepsis detection in neonates. When compared to conventional tests that take several days up to a week, sTREM-1 immunoassay is a faster approach for sepsis detection as it can be performed in five hours. However, the sTREM-1 immunoassay must be performed in a clinic laboratory by specialized staff and require several expensive and bulky equipment. One way to enable the sTREM-1 immunoassay outside specialized labs or at point-of-care (POC) is the integration of the complex assay into a centrifugal microfluidic platform. The disc-shaped microfluidic platform also known as lab-on-disc (LoD), employs centrifugal force from spinning of the disc to manipulate samples and reagents. The centrifugal force that exist everywhere on the disc prevents the need for several expensive syringe pumps. However, it makes simultaneous control over the retention and flow of several reagents/samples on a LoD challenging. To overcome this problem and automate sTREM-1 immunoassay for POC settings, this document presents the development of a new sacrificial polyethylene and a novel reversible valving mechanism on LoD. Based on the two valving mechanisms, a sTREM-1 immunoassay LoD is developed for sepsis detection. Integrating a series of sacrificial valves in the disc allowed for storage of reagents in the disc and their controlled release to a reaction chamber. The reversible valve, was used for the retention of each reagent in the detection chamber during incubation periods, and then transferring it to a waste chamber. A portable spinning system was developed to run the assay by microfluidic disc at POC. The successful automation of sTREM1 immunoassay on the microfluidic disc can provide a significant contribution in the reduction of complexity of the resources needed for sepsis detection at POC settings, particularly in remote areas.
- Alternative techniques for measuring the topological charge in optical vortices(2017-05-16) Peréz García, Benjamín de Jesús; López Mago, Dorilián; Gutiérrez Vega, Julio César; Rodríguez y Masegosa, RodolfoA set of alternative methods to measure the topological charge of optical vortices is presented. The first method uses a displaced superposition of two beams with orthogonal polarization states in a Cartesian basis (horizontal and vertical), while the second method uses a superposition of auxiliary displaced vector modes with orthogonal polarizations. The information of the topological charge is embedded in the rich space variant polarization profile generated by the superposition, which can be analized through the Stokes parameters. Also, the cross-correlation function is studied and allowed us to measure the azimuthal index by performing power measurements. These methods were validated in Mach–Zehnder and Sagnac interferometers
- Diseño e implementación de un sistema de notificación de alarmas para protecciones de subestaciones eléctricas(2017-05) Rincón González, Marco Antonio; Llamas Terrés, Armando Rafael; Baez Moreno, Jesús Antonio; Caramago Reyes, Luis EnriqueLa notificación temprana de eventos y disturbios generados por fallas eléctricas o un problema en una subestación eléctrica es de suma importancia para garantizar el estado óptimo de los equipos de la caseta de control y que todos los elementos de protección e interruptores se encuentren en condiciones de operación y servicio. Se sabe además que el mantenimiento y servicio oportuno a equipos de control y protección de una subestación aminora costos de reparación y garantizan la continuidad en el servicio eléctrico a nivel industrial y social teniendo un impacto positivo. En este trabajo de tesis para la Maestría en Ciencias con especialidad en Ingeniería Energética se propone el desarrollo de un equipo de fácil integración al circuito de control y protección de una subestación eléctrica de cualquier tamaño permitiendo que la misma pueda transmitir y notificar el estado de sus alarmas en tiempo real notificando a personal competente para atender de forma oportuna el evento o falla en la subestación. Muchas subestaciones eléctricas no cuentan con un método de notificación que permita la toma de acción oportuna ante un problema por lo que en este trabajo se establece que el dispositivo en diseño sea al menor costo sin escatimar eficiencia. Se cree además, que al trabajar el dispositivo en una red utilizando recursos de Cloud Computing puede ayudar a reducir los costos de operación sin perjudicar el tren de comunicación y con ello permitir que el servicio eléctrico se mantenga de una forma eficiente, confiable y seguro.