Universitat Politècnica de Catalunya: Recent submissions
Now showing items 621-640 of 5604
Exact coherent structures in the transitional regime of shear and centrifugal flows
Turbulence is one of the major concerns for most technological problems involving fluid motion. Specially in aeronautics, a turbulent boundary layer results in structural stresses, vibrations and higher aircraft drag, ...
Dynamics and control for continuous low-thrust spacecraft near collinear libration points
Due to the rich dynamic properties of the equilibria of the Restricted Three Body Problem (RTBP), the libration point orbits (LPOs) around them are ideal locations for scientific missions. Fortunately, these invariant ...
Computer modeling of the polarity and amoeboid motion of living cells
Cell motility is important in many biological processes. Some examples relay in epidermal cells moving towards lesions during wound healing, neutrophils cells migrating towards sites of bacterial infection as part of the ...
Contributions to energy-aware demand-response systems using SDN and NFV for fog computing
Ever-increasing energy consumption, the depletion of non-renewable resources, the climate impact associated with energy generation, and finite energy-production capacity are important concerns worldwide that drive the ...
Detection of a single erbium ion in a nanoparticle
Encoding information into quantum mechanical properties of a system can lead to applications many fields, including computing and communication. Devices that will enable these applications could be part of a quantum network ...
Kinodynamic planning and control of closed-chain robotic systems
This work proposes a methodology for kinodynamic planning and trajectory control in robots with closed kinematic chains. The ability to plan trajectories is key in a robotic system, as it provides a means to convert ...
Position analysis based on multi-affine formulations
The position analysis problem is a fundamental issue that underlies many problems in Robotics such as the inverse kinematics of serial robots, the forward kinematics of parallel robots, the coordinated manipulation of ...
Solving the nearest rotation matrix problem in three and four dimensions with applications in robotics
Since the map from quaternions to rotation matrices is a 2-to-1 covering map, this map cannot be smoothly inverted. As a consequence, it is sometimes erroneously assumed that all inversions should necessarily contain ...
Linking hydrodynamic and biological processes in a shallow and micro tidal estuary : the case of Fangar bay (Ebro delta)
This thesis analyses the relationships between hydrodynamics (and their forcings) and biological variables in Fangar Bay based on in situ observations, numerical models and satellite data. Fangar Bay is a relatively small, ...
Computational uncertainity quantification in pressure-driven fracture processes
Uncertainty quantification is important in assessing and predicting the performance of complex engineering systems and processes, especially in the absence of adequate experimental or real-world data. With the increase ...
Joint access-backhaul mechanisms in 5G cell-less architectures
Older generations of wireless networks, such as 1G and 2G were deployed using leased line, copper or fibre line as backhaul. Later, in 3G and 4G, microwave wireless links have also worked as backhaul links while the ...
On-the-fly synthesizer programming with rule learning
This manuscript explores automatic programming of sound synthesis algorithms within the context of the performative artistic practice known as live coding. Writing source code in an improvised way to create music or visuals ...
Refuerzo de estructuras de hormigón armado y pretensado por conversión a sección mixta mediante hidrodemolición
This thesis develops a new structural strengthening technique: converting existing reinforced concrete structures to composite sections by inserting connectors after controlled demolition with high-pressure water. The key ...
High-peak-power mid-infrared OPCPAs for extreme nonlinear photonics
In the last decades, intense carrier-envelope-phase-stable (CEP-stable) and near-single-cycle, coherent mid-infrared sources have become charming for a variety of applications in physics, chemistry and biology. In particular, ...
Three dimensional temporal-spatial model based SAR algorithms for monitoring large gradient deformations in mining area
Firstly, an External Model Deformation Decomposition based Persistent Scatters Interferometry (EMDD-PSI) method has been proposed. This method first uses original interferograms to optimize the parameters of the external ...
Estudio comparativo de métodos para la evaluación de la susceptibilidad del terreno a la formación de deslizamientos superficiales : aplicación al Pirineo Oriental
Human and economic losses caused by landslides have attracted the interest of the scientific community for the identification of the threatened areas and preventing their consequences. The goal of the landslide susceptibility ...
Timed array antenna system : application to wideband and ultra-wideband beamforming receivers
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 ...
Design, fabrication, characterization and reliability study of CMOS-MEMS Lorentz-Force magnetometers
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 ...
Desarrollo de modelos para la identificación de variedades y fitopatologías mediante técnicas fotónicas
In the cultivation of fruit trees, the most common is to work with cuttings. In this way, the grafted fruit tree variety offers specific fruit qualities and the rootstock offers certain agronomic and adaptation characteristics. ...
Fibre reinforced concrete column-supported flat slabs : from material and structural characterization to design and economic optimization
Fibre reinforced concrete (FRC) has proven to be a suitable material for statically indeterminate elements. The FRC column-supported flat slabs with partial or even total substitution of reinforcing steel bars constructed ...
