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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- Beacon free localization in mobile ad-hoc networks based on a modified taylor series multilateration technique(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2008-11-01) Rodríguez Delgado, José Manuel; RODRIGUEZ DELGADO, JOSE MANUEL; 179375; Bouchereau Lara, Frantz; Acevedo Mascarúa, Joaquín; Muñoz Rodríguez, David; Vargas Rosales, César; Programa de Graduados en Ingeniería; División de Tecnologías de Información y Electrónica; Campus MonterreyIn an Ad Hoc sensor network, we can use different algorithms to estimate the position of all the sensors in the network obtaining an estimation of the current position of the nodes in that instant. In this work is revised the position estimation in an environment where all the nodes are moving with a different velocity and direction and is observed how the estimation algorithms are affected with this movement and the improvements that can be done to improve the estimation.
- Estimación de parámetros de un canal compuesto utilizando el Método de Momentos Generalizado(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2008-11-01) Puón Díaz, Ana Cecilia; Bouchereau Lara, Frantz; Muñoz Rodríguez, David; Acevedo Mascarúa, Joaquín; Vargas Rosales, Cesar; Tecnológico de Monterrey, Campus Monterrey; Programa de Graduados en Mecatrónica y Tecnologías de Información; Campus MonterreyEl modelado estadístico del canal inalámbrico ha sido un problema para el análisis y diseño de sistemas de comunicaciones. Este problema puede ser solucionado usando el desvanecimiento compuesto como método para la selección de modelos estadísticos. Uno de los modelos compuesto es el Gamma-Lognormal (GL) que permite detallar de manera completa los canales inalámbricos ya que incluye los dos fenómenos presentes en la propagación de la señal, el desvanecimiento por múltiple trayectoria y el sombreado. También proporciona la ventaja de que algunos modelos clásicos pueden ser derivados de él. Para la obtención de los parámetros que describen el modelo GL se usará el estimador del Método de Momentos Generalizado y se comparará con el estimador del Método de Momentos presentado en el artículo [1] con el fin de mostrar que al utilizar una matriz de pesos el algoritmo entrega un estimador óptimo, si se utiliza la matriz que minimiza la varianza asintótica del estimador, y mejorar el desempeño.
- Position estimation using dead reckoning and other localized algorithms in wireless networks(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2008-07-01) Pérez González, Victor Hugo; Pérez González, Víctor Hugo; 349700; Bouchereau Lara, Frantz; Acevedo Mascarúa, Joaquín; Muñoz Rodríguez, David; Vargas Rosales, César; Programa de Graduados en Ingeniería; División de Tecnologías de Información y Electrónica; Campus MonterreyClassical position estimation techniques assume direct connectivity between a node with unknown coordinates and a certain amount of access points or landmarks. Position Estimation in Ad-Hoc Wireless Sensor Networks cannot be solved by using single hop algorithms because the node of interest may not be within the coverage area of the landmarks disabling any possibility of estimating the node’s coordinates. This work is devoted to study localized multihop algorithms and to show the advantages and disadvantages of them. The work is primarily focused on an old navigational technique called Dead Reckoning whose estimations are based on ranging and angular measurements along a defined path between a given access point and the node of interest. It is the purpose of this thesis work to highlight every advantage offered by this localized algorithm over a family of localized algorithms known as Distance Vector algorithms.
- Caracterización del comportamiento de una red Zigbee en presencia de fuentes interferentes dentro de la banda libre de 2.4 GHz usando las tarjetas MC13192EVB(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2008-01-01) Guevara Arellano, Marco Antonio; Bouchereau Lara, Frantz; Dieck Ássad, Graciano; Vargas Rosales, César; Rodríguez Cruz, José Ramón; Programa de Graduados en Mecatrónica y Tecnologías de Información; Campus Monterrey
- Dielectric Constant Measurements Using an Open-Ended Coaxial Probe and a Vector Network Analyzer -Edición Única(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2007-08-01) Montes Marrero, José Luis; Bouchereau Lara, Frantz; Martínez Chapa, Sergio Omar; Dieck Assad, Graciano; Campus Monterrey; Dieck Assad, GracianoNowadays, acute leukemia patients who have finished a chemotherapy treatment have to remain under observation, being subjects of periodic bone-marrow extractions in order to know if re-incidence of the disease exists. This procedure is harmful, risky and expensive for patients, and it provokes big expenses in money and resources for health institutes. This work tries to simplify the leukemia-reincidence diagnostic reducing the time it requires and introducing the possibility of performing it without the need of an invasive biopsy, based on the fact that in presence of cancer, human tissues show an increase on the dielectric constant parameter. For this, a method that allows for measuring such electric parameter and that has already been studied for breast cancer detection was implemented, which makes use of an open-ended coaxial probe and a Vector Network Analyzer (VNA). In this scheme, the probe is immersed in a bone marrow sample for obtaining reflection measurements of electromagnetic fields emitted by the analyzer. In order to estimate electrical properties of the tissue under observation, reflection measurements are processed by means of mathematical algorithms and electromagnetic simulations which were implemented within this work. In-vivo leukemia-reincidence detection will be possible by the use of micro-machined coaxial probes manufactured with emerging nanotechnologies. Non-invasive methods will be possible by modeling bone, muscle, fat and skin tissues as a whole, and by uncoupling their electromagnetic response from obtained measurements of the coaxial-probe in contact with the skin of a patient’s extremity
- Artifact elimination from EEG signals using parametric modeling restoration and independent component analysis(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2007-05-01) Peraza Rodríguez, Luis Ramón; Peraza Rodriguez, Luis; 179355; Bouchereau Lara, Frantz; Arcos Camargo, Demetrio; Martinez Chapa, Sergio Omar; ITESM-Campus Monterrey; Dieck Assad, GracianoThis thesis faces the problem of eliminating time-constrained artifacts from electroencephalographic (EEG) signals. Four signal restoration techniques are analyzed, autoregressive interpolation (ARI), linear prediction interpolation (LPI), warped linear prediction interpolation (WLPI), and a novel technique proposed in this thesis, Fourier linear combiner interpolation (FLCI). The signal restoration techniques are based on widely accepted models for EEG signals. First, these techniques are used to remove time-constrained artifacts from a single EEG channel when few electrodes are available, as occurs in neonatal EEG and polysomnography. Here, we prove the preserving of the spectral information within the restored segment. Further, when having more available electrodes and knowing that a time-constrained artifact contaminates several channels, we propose to restore the artifactual independent component (IC) instead of zeroing it out, which is a common practice. It is proved that in the bands of interest the spectral information is enhanced by reducing the mean squared error along the frequency components.