Universitat Politècnica de Catalunya
Now showing items 181-200 of 207
Els avanços en neurociència han portat el desenvolupament de models complexes de neurones artificials semblants a les seves contraparts biològiques. Aquests models han millorat la funcionalitat de les xarxes neuronals ...
The main objective of this thesis is to contribute to the prevention and control of the cardiovascular risk, hydration state and nutritional state in dialysis patients using non-invasive electrical impedance measurements. ...
Un dels límits fonamentals que afecta l'eficiència de conversió en cèl·lules fotovoltaiques és la distribució espectral de la radiació solar. D'una banda, només els fotons amb energia superior al gap del semiconductor poden ...
The main objective of this thesis is to bring new contributions to the self-healing and secure systems domain. In particular, to develop a self-healing technique for memory systems and to increase security of memory systems, ...
El objetivo de la tesis es realizar aportaciones en el campo de las estrategias de test basadas en la vigilancia del consumo quiescente de los circuitos integrados CMOS y de los sensores utilizados para dicho fin (test de ...
Dielectric charging represents a major reliability issue in a variety of semiconductor devices. The accumulation of charge in dielectric layers of a device often alters its performance, affecting its circuital features and ...
El elevado coste de producción de los módulos de silicio cristalino (c-Si) dificulta el progreso de la industria fotovoltaica como una alternativa viable para la producción de energía limpia. Por esta razón, los fabricantes ...
In order to optimize photovoltaic conversion efficiency, various solar cell architectures based on monocrystalline silicon (c-Si) have emerged in the past. Solar cells with interdigitated back contacts IBC (Interdigitated ...
El desarrollo de la tecnología electrónica hace necesario disponer de modelos fiables de los dispositivos y convierte la simulación de los mismos en un elemento estratégico para su desarrollo presente y futuro. El transistor ...
In this thesis, design and simulation of optical logic gases based on different photonics crystals presented to used in the electronics and telecommunication industries. Optical devices perform faster with higher efficiencies ...
In this Thesis, new methods for monitoring marine species using optical, radio frequency and acoustic technologies have been proposed and evaluated for biological studies in the laboratory and open sea. A study of the ...
Uno de los campos más importantes de la Electrónica de Potencia es el de los convertidores de potencia conmutados, que debido a sus características de alto rendimiento energético, reducido tamaño, posibilidades de regulación ...
Many methods for EMI suppression have been developed in the last fifty years, most of them, showing a hardly change in its implementation. Traditional tools for EMI suppression are related to the use of filters, shielding ...
This work deals with the research on organic solar cells based on small-molecules semiconductors. In particular, organic solar cells of this thesis have been used tetraphenyldibenzoperiflanthene as donor material and ...
En aquesta tesi s'estudia la passivació del silici cristal·lí per a la producció de cèl·lules solars d'alta eficiència (> 20%) a baix preu.<br/>Actualment la indústria fotovoltaica empra capes de nitrur de silici crescut ...
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: ...
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 ...
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 ...
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 ...
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 ...
