Browsing by Subject "621"
Now showing items 1-20 of 352
222Rn as a tracer for air mass transport characterization at 100-m-high tower in the south-west Spanish coast
Es los últimos años se han llevado a cabo importantes trabajos de investigación, tomando el gas radón como elemento de evaluación en modelos de transporte atmosférico y así estimar el flujo de partículas. Además la utilización ...
A computational micromechanics investigation of longitudinal strength in unidirectional fibre reinforced composites
The use of Fibre Reinforced Polymers (FRP) composites has grown in popularity over the last few decades. They offer outstanding mechanical properties combined with a low density, making them an excellent solution for many ...
A coupling matrix vision for mobile filtering devices with micro-acoustic wave technologies. A systematic approach
Con el espectro radioeléctrico cada vez más saturado, los filtros y duplexores son elementos claves de la tecnología en el mercado de dispositivos discretos para la telefonía móvil. El segmento de usuario de los sistemas ...
A high-performance electromagnetic vibration energy harvester based on ring magnets with Halbach configuration: design, optimization, and applications
Electromagnetic vibration energy harvesting is a relatively modern technology that has received relevant attention in the last decade from the research community and industry as a potential complement or alternative to the ...
A hybrid approach of knowledge-based reasoning for structural assessment
La idea básica de detección de defectos basada en vibraciones en Monitorización de la Salud Estructural (SHM), es que el defecto altera las propiedades de rigidez, masa o disipación de energía de un sistema, el cual, altera ...
A mechano-perfusion bioreactor for tissue engineering
Tissue Engineering plays a vital role in tissue construct to repair, maintain or replace tissues. Those tissues can be cultivated in vivo or in vitro using devices such as bioreactors. There are several approaches to ...
A model for railway induced ground vibrations in the frame of preliminary assessment studies
This thesis focuses on the development of an analytical model for the generation and propagation parts of a global model of ground induced vibrations to be used in preliminary assessment studies for the case of at-grade ...
A new computational approach to topology optimization in solid mechanics problems
This doctoral thesis addresses topology optimization problems at a single scale. Based on this purpose, a new topology optimization approach is developed in order to improve existing and widespread techniques in the research ...
A There Dimensional Setting for Strong Discontinuities Modelling in Failure Mechanics
El estudio de la mecánica computacional de fallo ha ganado creciente popularidad en los últimos años. Modelizar el comportamiento poscrítico de estructuras puede alcanzar un grado elevado de complejidad, debido a la ...
Absolute quantification in brain SPECT imaging
Certes malalties neurològiques estan associades amb problemes en els sistemes de neurotransmissió. Una aproximació a l'estudi d'aquests sistemes és la tomografia d'emissió SPECT (Single Photon Emission Computed Tomography) ...
Accionamiento y control del posicionado de aperos agrícolas mediante actuadores oleohidráulicos
La presente tesis doctoral trata sobre el accionamiento y control del posicionado de aperos agrícolas que configuran aspectos funcionales de máquinas tales como palas cargadoras frontales, máquinas cosechadoras de caña de ...
Active control of noise transmitted from barriers
Active noise cancellation is a unique approach that helps passive noise control in reducing sound levels at low frequencies; nevertheless, successful use of active noise cancellation necessitates performing numerous and ...
Active flow control optimization on Selig Donovan 7003 airfoil
(English) The PhD focuses on the study of the flow around an airfoil at different Angles of Attack (AoA) with and without the implementation of Active Flow Control (AFC), while maintaining the Reynolds number constant at ...
Adecuación y desarrollo de métodos de análisis de datos obtenidos mediante espectrometría gamma para la medida de la radiactividad ambiental en tiempo real
La Xarxa de Vigilància Radiològica Ambiental de la Generalitat de Catalunya està constituïda per diversos tipus de detectors per a la mesura automàtica en continu i en temps real de la radiació ambiental. Entre ells destaquen ...
Advanced thermal energy storage research in demo plants for commercial systems
La present tesis s’enmarca en el camp/sector de l’emmagatzematge d’energia tèrmica, concretament en el procès de disseny i optimització que comporta el desenvolupament d’una tecnologia d’emmagatzematge tèrmic. Per aquest ...
Advances in fibre Bragg grating sensors for damage detection in composite laminates: application in quasi-static and fatigue delamination tests
The use of composite materials in industrial applications such as aeronautical, aerospace or wind energy production has greatly increased in recent decades. Due to their inherent properties, these materials allow lighter, ...
Advances in gain-scheduling and fault tolerant control techniques
This thesis presents some contributions to the state-of-the-art of the fields of gain-scheduling and fault tolerant control (FTC). In the area of gain-scheduling, the connections between the linear parameter varying (LPV) ...
Advances in the modelling of thermoelectric energy harvesters in waste heat recovery applications
In this work, we investigate harvesting thermoelectric energy from wasted heat in fluid networks and propose a generic tool for the simulation and sizing of thermoelectric energy harvesters, that can be used in ...
Amortiguación de final de carrera de actuadores hidráulicos
The internal cushioning systems of hydraulic linear actuators, of special interest in mobile machinery, pursue to avoid mechanical shocks at their end of stroke. The design where the piston, with perimeter grooves, regulates ...
