Now showing items 21-40 of 212

    Design, fabrication, characterization and reliability study of CMOS-MEMS Lorentz-Force magnetometers 

    Valle Fraga, Juan José (Date of defense: 2022-04-06)

    Today, the most common form of mass-production semiconductor device fabrication is Complementary Metal-Oxide Semiconductor (CMOS) technology. The dedicated Integrated Circuit (IC) interfaces of commercial sensors are ...

    Design and implementation of wireless nodes for the Internet of Things 

    Ripoll Vercellone, Edgar (Date of defense: 2022-04-01)

    The Internet of Things is a trending topic these days. However, energy is often the major job stopper for broad adoption of this technology, which have three tight constraints: extremely cost oriented, long service life ...

    Contributions to the design of energy harvesting systems for autonomous sensors in low power marine applications 

    Carandell Widmer, Matias (Date of defense: 2022-04-28)

    Oceanographic sensor platforms provide biological and meteorological data to help understand changes in marine environment and help to preserve it. Lagrangian drifters are autonomous passive floating platforms used in ...

    Métodos objetivos estadísticos de valoración de la magnitud de interés en base a las trayectorias de dirección de visionado 

    López Palma, Manuel (Date of defense: 2020-10-23)

    In this work, a new method is presented to quantify the attention paid by people to the different objects in their environment. The new metric models the eye to determine the attention given and quantifies that attention ...

    Infrared optical filters based in macroporous silicon for espectroscopic gas detection 

    Cardador Maza, David (Date of defense: 2019-12-19)

    Gas detection is of great importance in areas as diverse as industry, health or safety in domestic environments or public spaces, among others, and it is highly specific to each application. The detection method depends ...

    High efficiency sensorless fault tolerant control of permanent magnet assisted synchronous reluctance motor 

    Michalski, Tomasz Dobromir (Date of defense: 2021-10-18)

    In the last decades, the development trends of high efficiency and compact electric drives on the motor side focused on Permanent Magnet Synchronous Machines (PMSMs) equipped with magnets based on the rare-earth elements. ...

    Simulation and design of all-optical logic gates based on photonic crystals 

    Yoosefi, Oraman (Date of defense: 2021-07-07)

    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 ...

    Marine sensor interoperability applied to in situ ocean sound processing 

    Martínez Padró, Enoc (Date of defense: 2021-07-09)

    There has always been background sound in the oceans due to natural factors. However, since the first hydrophone deployments at mid-20th century, measured ocean sound levels have been steadily rising due to an increment ...

    Digital hardware architectures for beam synchronous processing and RF of synchronization of particle accelerators 

    Galindo Guarch, Francisco Javier (Date of defense: 2021-07-01)

    In Particle Accelerators, the Low-Level RF (LLRF) is the control system of the RF, and in the end, of the purpose of the machine, that is the energy transfer and acceleration of particles. It implements algorithms synchronizing ...

    Low-power read-out ICs for smart electrochemical sensors 

    Aymerich Gubern, Joan (Date of defense: 2021-03-18)

    Electrochemical sensors are expanding rapidly over other chemical sensoring technologies because of their potential to generate precise, selective, miniaturized and cost-effective analytical devices. These features satisfy ...

    High performance readout circuits and devices for Lorentz force resonant CMOS-MEMS magnetic sensors 

    Sánchez Chiva, Josep Maria (Date of defense: 2020-03-05)

    In the last decades, sensing capabilities of martphones have greatly improved since the early mobile phones of the 90’s. Moreover, wearables and the automotive industry require increasing electronics and sensing sophistication. ...

    A contribution to unobtrusive video-based measurement of respiratory signals 

    Mateu Mateus, Marc (Date of defense: 2020-12-01)

    Due to the growing popularity of video-based methods for physiological signal measurement, and taking into account the technological advancements of these type of devices, this work proposes a series of new novel methods ...

    Contributions to the energy management of industrial refrigeration systems: a data-driven perspective 

    Cirera Balcells, Josep (Date of defense: 2020-09-18)

    Nowadays, energy management has gained attention due to the constant increment of energy consumption in industry and the pollution problems that this fact supposes. On this subject, one of the main industrial sectors, the ...

    Active gate drivers for high-frequency application of SiC MOSFETs 

    Paredes Camacho, Alejandro (Date of defense: 2020-07-17)

    The trend in the development of power converters is focused on efficient systems with high power density, reliability and low cost. The challenges to cover the new power converters requirements are mainly concentered on ...

    Reliability-aware circuit design to mitigate impact of device defects and variability in emerging memristor-based applications 

    Escudero López, Manuel (Date of defense: 2020-05-22)

    In the last decades, semiconductor industry has fostered a fast downscale in technology, propelling the large scale integration of CMOS-based systems. The benefits in miniaturization are numerous, highlighting faster ...

    Design and process developments towards an optimal 6.5 kV SiC power MOSFET 

    Soler, Victor (Date of defense: 2019-11-26)

    A sustainable future requires efficient power electronic converters at any stage of the electrical energy consumption. Silicon carbide (SiC) is one of the most technologically advanced wide bandgap semiconductors that can ...

    Acoustic underwater target tracking methods using autonomous vehicles 

    Masmitjà i Rusinyol, Ivan (Date of defense: 2020-01-21)

    Marine ecological research related to the increasing importance which the fisheries sector has reached so far, new methods and tools to study the biological components of our oceans are needed. The capacity to measure ...

    Advanced energy management strategies for HVAC systems in smart buildings 

    Sala Cardoso, Enric (Date of defense: 2019-12-16)

    The efficacy of the energy management systems at dealing with energy consumption in buildings has been a topic with a growing interest in recent years due to the ever-increasing global energy demand and the large percentage ...

    Aportaciones al dimensionamiento y gestión de energía de un tren de potencia eléctrico híbrido para vehículos industriales con ciclos de conducción repetitivos y agresivos 

    Cortez, Ernest (Date of defense: 2019-12-11)

    Currently, the interest for helping mitigate the emission of greenhouse gases caused by high fuel consumption in industrial vehicles has increased. In order to the reduction of fuel consumption in an industrial vehicle, ...

    MOS interface improvement based on boron treatments for high channel mobility SiC MOSFETs 

    Cabello Fusarés, Maria (Date of defense: 2019-12-02)

    Although silicon (Si) is used in most current commercial power semiconductor components, Si capabilities are insufficient for new energy conversion requirements. Some of its important limitations are related with power ...