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Height variation of gaps in 150‐km echoes and whole atmosphere community climate model electron densities suggest link to upper hybrid resonance
(American Geophysical Union, 2020-01)
Radar echoes from the daytime lower F region near the magnetic equator, so-called 150-km echoes, have been puzzling researchers for decades. Neither the mechanisms that generate the enhanced backscatter at very high ...
Sudden disappearance of vhf radar echoes from equatorial e-region irregularities
(Council of Scientific and Industrial Research, 1977-01)
The Modified Range Time lntensity Technique for studying the height variation of the (back-scatter power of vhf radar echoes at Jicamarca has been used to show that the growth lime of E-region irregularities is less than ...
Evaluación de la respuesta sísmica de una estructura importante de concreto armado en la costa de Lima con presencia de pisos de doble altura en diferentes ubicaciones mediante un análisis no-lineal pushover para determinar los efectos globales
(Universidad Peruana de Ciencias Aplicadas (UPC)PE, 2022-06)
En la presente tesis se desarrolla la evaluación del comportamiento estructural de una edificación de concreto armado de 15 niveles en la ciudad de Lima, Perú, por medio de un análisis no lineal “Pushover” y un análisis ...
Análise estrutural da suspensão dianteira de um mini baja
(Universidade Tecnológica Federal do ParanáCornelio ProcopioBrasilEngenharia MecânicaUTFPR, 2017-11-30)
There is a great demand to the structural reliability of the systems and components of the off road racing vehicle, especially the suspension system since it is responsible for absorbing the impacts resulted from the ...
Stochastic modelling considering ionospheric scintillation effects on GNSS relative and point positioning
(Elsevier B.V., 2010-05-03)
Global Navigation Satellite Systems (GNSS), in particular the Global Positioning System (GPS), have been widely used for high accuracy geodetic positioning. The Least Squares functional models related to the GNSS observables ...
Stochastic modelling considering ionospheric scintillation effects on GNSS relative and point positioning
(Elsevier B.V., 2010-05-03)
Global Navigation Satellite Systems (GNSS), in particular the Global Positioning System (GPS), have been widely used for high accuracy geodetic positioning. The Least Squares functional models related to the GNSS observables ...
Evaluación del coeficiente de disipación de energía R en edificaciones de concreto reforzado con disipadores de energía viscosos ubicados en zona de amenaza sísmica alta
(Bogotá - Ingeniería - Maestría en Ingeniería - EstructurasUniversidad Nacional de Colombia - Sede Bogotá, 2020-12-10)
Viscous fluid dampers are a seismic protection alternative that improve the dynamic performance of buildings under seismic events. These devices concentrate their actions mechanism (movement of the fluid inside) to dissipate ...