Now showing items 195-206 of 206

    Tecnología de fabricación de células solares con materiales candidatos a presentar banda intermedia 

    Boronat Moreiro, Alfredo (Date of defense: 2013-10-11)

    This work has been developed in a line of research related whit the Intermediate Band (IB) concept, which explores overcoming the photovoltaic efficiency limits established for solar cells. The IB concept implies two issues: ...

    Textile UHF-RFID antenna sensors based on material features, interfaces and application scenarios 

    Luo, Chengyang (Date of defense: 2022-06-21)

    Radio frequency identification over measurable ultra-high frequency textile substrates (UHF-RFID) is a promising technology to develop new applications in the field of health and the Internet of Things (IOT), due to the ...

    Técnicas de reducción del ruido de conmutación en circuitos integrados CMOS 

    González Jiménez, José Luis (Date of defense: 1998-01-19)

    El ruido de conmutación generado por los circuitos digitales representa un problema importante que a menudolimita las prestaciones de los circuitos integradosdigitales y mixtos. éste ruido de conmutación estápresente en ...

    Time synchronization in underwater acoustic sensor networks 

    Pallarés Valls, Oriol (Date of defense: 2016-11-30)

    This thesis deals with the development of a time synchronization algorithm for underwater sensor networks. The ease of deployment and maintenance of wireless networks leaded this research to the use of an acoustic communication ...

    Timed array antenna system : application to wideband and ultra-wideband beamforming receivers 

    Aghazadeh Dafsari, Seyed Rasoul (Date of defense: 2022-05-03)

    Antenna array systems have a broad range of applications in radio frequency (RF) and ultra-wideband (UWB) communications to receive/transmit electromagnetic waves from/to the sky. They can enhance the amplitude of the input ...

    Tomografía de impedancia eléctrica para aplicaciones médicas 

    Rosell Ferrer, Javier (Date of defense: 1989-07-11)

    En esta tesis se analizan las bases de la Tomografía de Impedancia Eléctrica (TIE) desde los aspectos de campos electromagnéticos, los electrodos y las propiedades eléctricas de los tejidos en seres vivos. Se analizan los ...

    Transmissió de potencials d'acció basada en la propagació de camps elèctrics intra-membrana 

    Martí Edo, Albert (Date of defense: 2017-07-18)

    Current theories and mechanisms of nerve impulse propagation inside neurons do not give a satisfactory explanation to the nanoscale processes that occur inside the membrane. Propagation at the dendritic zones, and at the ...

    Una contribución a la evaluación de la adherencia a hábitos de vida saludables basado en aplicaciones móviles 

    Guede Fernández, Federico (Date of defense: 2018-09-06)

    The adherence to a healthy lifestyle plays a key role for increasing life expectancy and living better. The main habits of healthy lifestyle are: physical activity, diet and sleep quality. Nowadays, many people use a ...

    Variability and reliability analysis of carbon nanotube technology in the presence of manufacturing imperfections 

    García Almudéver, Carmen (Date of defense: 2014-07-29)

    In 1925, Lilienfeld patented the basic principle of field effect transistor (FET). Thirty-four years later, Kahng and Atalla invented the MOSFET. Since that time, it has become the most widely used type of transistor in ...

    Variability-aware architectures based on hardware redundancy for nanoscale reliable computation 

    Aymerich Capdevila, Nivard (Date of defense: 2013-12-16)

    During the last decades, human beings have experienced a significant enhancement in the quality of life thanks in large part to the fast evolution of Integrated Circuits (IC). This unprecedented technological race, along ...

    Voltage-source-inverters with legs connected in parallel 

    Capellá Frau, Gabriel José (Date of defense: 2015-03-26)

    The number of applications that require the use of power converters has been continually increasing in the last years on account of environmental and economical concerns. The power to be processed by these converters has ...

    Wireless power transfer : fueling the dots 

    Bou Balust, Elisenda (Date of defense: 2017-07-17)

    Resonant Inductive Coupling Wireless Power Transfer (RIC-WPT) has been proven to provide very high power transfer efficiencies (above 80%) for moderate distances, and is hence foreseen as a key technology to enable wireless ...