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Sistema de navegación de vehículos autónomos basado en Real-Time Kinematics

ALEX ANTONIO TURRIZA SUAREZ ARTURO ESPINOSA ROMERO ANABEL MARTIN GONZALEZ (2019)

El posicionamiento satelital mediante el Sistema de Posicionamiento Global (GPS), usado en gran cantidad de dispositivos para determinar su ubicación dentro del sistema de coordenadas terrestre, suele verse afectado por múltiples factores que tienen como consecuencia errores de medición en la escala de metros y que derivan en otras imprecisiones al efectuar mediciones relacionadas a la localización. En este artículo se presenta el diseño e implementación de un sistema de navegación en tiempo real, basado en la técnica conocida como Real-Time Kinematics, utilizando tarjetas de desarrollo de GPS conectadas a una placa de computadora BeagleBone Black bajo el sistema operativo GNU/Linux, que incrementa la precisión de la ubicación de vehículos aéreos no tripulados en el orden de centímetros, facilitando, de esta manera, el control del posicionamiento de los mismos en tiempo real, y permitiendo el fácil acoplamiento e interacción con otros desarrollos realizados bajo el mismo sistema operativo.

Article

CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA INGENIERÍA Y TECNOLOGÍA GPS Real-Time Kinematics Control autónomo Vehículo autónomo BeagleBone Black

An experimental approach to discrete dynamical systems with Mathematica

Michael Studer (2021)

Experiment with discrete time dynamical systems, may represent an important educational resource in the investigation of the properties of dynamical systems and their potential applications to disciplines such as economics. As an illustration of this possibility teaching, this paper provides a brief introduction to the dynamics of discretetime dynamic systems using examples assisted by the symbolic language Mathematica. Such systems are essentially iterated maps. In the first part, we construct orbits of points under iteration of real and complex functions. If x is a real number or a complex number, then the orbit of x under f is the sequence {x, f (x), f (f (x)), ...}. These sequences may be convergent or sequences that tend to infinity. In particular, to test this behavior in complex sequences will require the concept of derivative of a complex function. In a second part, we use the concepts reviewed in the first to build Julia sets, these sets are obtained by assigning colors to a rectangular grid points according to the behavior of their orbits under the studied complex function, the colors are assigned according the classification of the points. The pattern obtained, the Julia set is a fractal. However, the image obtained is always an approximation.

Article

Artículo

Iteration dynamic system Mathematica fixed point orbits Julia set Iteración sistema dinámico punto fijo orbita conjunto Julia CIENCIAS SOCIALES CIENCIAS SOCIALES

Reverberation and photoionization estimates of the Broad Line Region Radius in Low-z Quasars

CASTALIA ALENKA NEGRETE PEÑALOZA (2013)

Black Hole Mass estimation in quasars, especially at high redshift, involves use of single epoch spectra with s/n and resolution that permit accurate measurement of the width of a broad line assumed to be a reliable virial estimator. Coupled with an estimate of the radius of the broad line region this yields MMB· The radius of the broad line region (BLR) may be inferred from an extrapolation of the correlation between source luminosity and reverberation derived rBLR measures (the so-called Kaspi relation involving about 60 low z sources). We are exploring a different method for estimating rBLR directly from inferred physical conditions in the BLR of each source. We report here on a comparison of rBLR estimates that come from our method and from reverberation mapping. Our “photoionization” method employs diagnostic line intensity ratios in the rest-frame range 1400-2000 Å (AlIIIλ1860/ SiIII]λ1892, Civλ1549/AlIIIλ1860) that enable derivation of the product of density and ionization parameter with the BLR distance derived from the definition of the ionization parameter. We find good agreement between our estimates of the density, ionization parameter and rBLR and those from reverberation mapping. We suggest empirical corrections to improve the agreement between individual photoionization-derived rBLR values and those obtained from reverberation mapping. The results in this paper can be exploited to estimate black hole masses MBH for large samples of high-z quasars using an appropriate virial broadening estimator. We show that the width of the UV intermediate emission lines are consistent with the width of Hβ, therefore providing a reliable virial broadening estimator that can be measured in large samples of high-z quasars.

Article

Galaxies: active Quasars: general Quasars: emission lines Black holes: physics CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA ASTRONOMÍA Y ASTROFÍSICA ASTRONOMÍA Y ASTROFÍSICA

Realidad virtual en fenómenos del espacio interestelar

ANTONIO LUCIANO HERNANDEZ PADILLA FIDEL CRUZ PEREGRINO Rodrigo Ramírez Ramírez (2019)

Coordinación de Posgrado de Ciencias y Artes para el Diseño

En la actualidad la realidad virtual puede llegar a ser utilizada para dar a conocer temas importantes como fenómenos del espacio interestelar y poder adentrarse en la sensación de poder estar en el espacio sin salir de casa. Este es un caso en donde se busca crear la interacción correcta con el usuario para adentrarlo en temas del espacio.

Nowadays, virtual reality can be used to publicize important topics such as interstellar space phenomena and provide the feeling of being in space without leaving home. In this work the aim is to create the correct interaction with the user to introduce him to space issues.

Book part

Realidad virtual, hoyo negro, cuásar, púlsar, exoplaneta, espacio. Virtual reality, black hole, quasar, pulsar, exoplanet, space. Virtual reality. Realidad virtual. Simulación por computadora. Simuladores espaciales. QA76.9.V5 INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS TECNOLOGÍA DE LOS ORDENADORES