http://hdl.handle.net/10016/2337 2013-05-24T04:12:37Z http://hdl.handle.net/10016/16418 Title: APElNTA: Apuesta Por la Enseñanza Inclusiva: uso de nuevas tecnologías dentro y fuera del aula Author(s): Iglesias, Ana; Moreno, Lourdes; Castro, Elena; Martínez, Paloma; Jiménez, Javier; Revuelta, Pablo; Sánchez-Pena, José Manuel; Ruiz-Mezcua, Belén Abstract: El objetivo principal del proyecto APEINTA (acrónimo de Apuesta Por la Enseñanza Inclusiva: uso de Nuevas Tecnologías dentro y fuera del Aula) es apostar por una enseñanza de integración e igualdad, donde el gran protagonista es el estudiante. Para ello se propone el uso de las nuevas tecnologías, tanto informáticas como telemáticas, para evitar las barreras de aprendizaje que actualmente persisten en las aulas. Description: Artículo ganador del Premio FIAPAS de investigación en deficiencias auditivas, Área de educación (2009) 2009-12-31T23:00:00Z http://hdl.handle.net/10016/5784 Title: Radio-Frequency Self-Referencing Technique With Enhanced Sensitivity for Coarse WDM Fiber Optic Intensity Sensors Author(s): Montalvo, Julio; Frazão, Orlando; Santos, José Luis; Vázquez, Carmen; Baptista, José Manuel Abstract: A self-referenced passive optical network (PON) with coarse wavelength division multiplexing (CWDM) is reported for remotely addressing optical intensity sensors with enhanced sensitivity. The self-referencing remote configuration is described as a finite-impulse-response (FIR) filter in reflective operation using two fiber Bragg gratings (FBG) and a fiber delay line. The antisymmetrical phase response of the configuration permits to achieve a self-referencing measurement parameter two times more sensitive than reported previously. To enhance the power budget of the network, CWDM devices with low insertion losses are used for spectral splitting of a radio-frequency (RF) modulated broadband light source (BLS). The network topology and the sensor's interrogation technique are theoretically analyzed and experimental results validating the models are reported. 2009-02-28T23:00:00Z http://hdl.handle.net/10016/5783 Title: Multiplexer and variable optical attenuator based on PDLC for polymer optical fiber networks Author(s): Contreras Lallana, Pedro; Vázquez, Carmen; Vinouze, B.; Heggarty, K.; Sánchez Montero, David Abstract: In this work, a combination of a multiplexer and a variable optical attenuator in the same device (VMUX) for use in Polymer Optical Fiber is proposed. Polymer Dispersed Liquid Crystals (PDLC) are polarization independent, have high contrast and gray scale capability. For these reasons, PDLC cells with pixels can be used as switching elements in the device. Characterization of the PDLC has been carried out at two wavelengths. VMUX Complete switching is reached for driving voltages of 20 Vrms, with insertion losses less than 1.6 dB, attenuation larger than 31 dB, rise time less than 2.6 ms and decay time better than 12.4 ms have been obtained. 2009-04-30T22:00:00Z http://hdl.handle.net/10016/5762 Title: Use of a novel fiber optical strain sensor for monitoring the vertical deflection of an aircraft flap Author(s): Durana, Gaizka; Kirchhof, Marlene; Luber, Michael; Sáez de Ocáriz, Idurre; Poisel, Hans; Zubia, Joseba; Vázquez, Carmen Abstract: The present paper reports the use of a plastic optical fiber-based sensor for elongation measurements in an aircraft flap subjected to different types of flexural loading conditions. The sensor, bonded to the surface of the aircraft structure, relies on measuring the phase shift that occurs between two sinusoidally modulated light signals when the aircraft structure is bent. The light signals are guided through two optical fibers, one of them fixed to the top surface of the flap, and the other one to the bottom surface. The sensor offers good signal stability and repeatability and represents a cost-effective alternative to other more sophisticated health-monitoring systems currently used. 2009-09-30T22:00:00Z