Enviament des de DRAC
http://hdl.handle.net/2117/3055
20160502T20:41:25Z

Els centres de la metròpolis = Los centros de la metrópolis = The centers of the metropolis
http://hdl.handle.net/2117/86505
Els centres de la metròpolis = Los centros de la metrópolis = The centers of the metropolis
Gómez Escoda, Eulalia Maria
20160502T17:55:21Z
Gómez Escoda, Eulalia Maria

Lie algebrabased kinematic prior for 3D human pose tracking
http://hdl.handle.net/2117/86504
Lie algebrabased kinematic prior for 3D human pose tracking
Simó Serra, Edgar; Torras, Carme; MorenoNoguer, Francesc
We propose a novel kinematic prior for 3D human pose tracking that allows predicting the position in subsequent frames given the current position. We first define a Riemannian manifold that models the pose and extend it with its Lie algebra to also be able to represent the kinematics. We then learn a joint Gaussian mixture model of both the human pose and the kinematics on this manifold. Finally by conditioning the kinematics on the pose we are able to obtain a distribution of poses for subsequent frames that which can be used as a reliable prior in 3D human pose tracking. Our model scales well to large amounts of data and can be sampled at over 100,000 samples/second. We show it outperforms the widely used Gaussian diffusion model on the challenging Human3.6M dataset.
20160502T17:55:01Z
Simó Serra, Edgar
Torras, Carme
MorenoNoguer, Francesc
We propose a novel kinematic prior for 3D human pose tracking that allows predicting the position in subsequent frames given the current position. We first define a Riemannian manifold that models the pose and extend it with its Lie algebra to also be able to represent the kinematics. We then learn a joint Gaussian mixture model of both the human pose and the kinematics on this manifold. Finally by conditioning the kinematics on the pose we are able to obtain a distribution of poses for subsequent frames that which can be used as a reliable prior in 3D human pose tracking. Our model scales well to large amounts of data and can be sampled at over 100,000 samples/second. We show it outperforms the widely used Gaussian diffusion model on the challenging Human3.6M dataset.

El carácter de la ciudad (traducció)
http://hdl.handle.net/2117/86503
El carácter de la ciudad (traducció)
Gómez Escoda, Eulalia Maria
Edición de un conjunto de lecturas seleccionadas de autores destacados, en versión castellana, acerca de las calles y vías modernas de nuestras ciudades, precedidas de una Introducción al conjunto de ellas y a cada uno de los autores. Las labores de edición se extienden a la traducción al castellano de 16 de los artículos y la revisión de todos los incluidos.
20160502T17:49:06Z
Gómez Escoda, Eulalia Maria
Edición de un conjunto de lecturas seleccionadas de autores destacados, en versión castellana, acerca de las calles y vías modernas de nuestras ciudades, precedidas de una Introducción al conjunto de ellas y a cada uno de los autores. Las labores de edición se extienden a la traducción al castellano de 16 de los artículos y la revisión de todos los incluidos.

Oscillatory motions for the restricted planar circular three body problem
http://hdl.handle.net/2117/86502
Oscillatory motions for the restricted planar circular three body problem
Guàrdia Munarriz, Marcel; Martín, Pau; MartínezSeara Alonso, M. Teresa
© 2015, SpringerVerlag Berlin Heidelberg. The restricted three body problem models the motion of a massless body under the influence of the Newtonian gravitational force caused by two other bodies called the primaries. When they move along circular Keplerian orbits and the third body moves in the same plane, one has the restricted planar circular three body problem (RPC3BP). In suitable coordinates, it is a Hamiltonian system of two degrees of freedom. The conserved energy is usually called the Jacobi constant. Llibre and Simó [Math Ann 248(2):153–184, 1980] proved the existence of oscillatory motions for this system. That is, orbits which leave every bounded region but which return infinitely often to some fixed bounded region. To prove their existence they had to assume the ratio between the masses of the primaries to be small enough. In this paper we prove the existence of such motions for any value of the mass ratio(Formula presented.) closing the problem of existence of oscillatory motions in the RPC3BP. To obtain such motions, we restrict ourselves to the level sets of the Jacobi constant. We show that, for any value of the mass ratio and for large values of the Jacobi constant, there exist transversal intersections between the stable and unstable manifolds of infinity in these level sets. These transversal intersections guarantee the existence of a symbolic dynamics that creates the oscillatory orbits. The main achievement is to prove the existence of these orbits without assuming the mass ratio (Formula presented.) small. When (Formula presented.) is not small, this transversality can not be checked by means of classical perturbation theory. Since our method is valid for all values of v, we are able to detect a curve in the parameter space, formed by (Formula presented.) and the Jacobi constant, where cubic homoclinic tangencies between the invariant manifolds of infinity appear.
20160502T17:44:48Z
Guàrdia Munarriz, Marcel
Martín, Pau
MartínezSeara Alonso, M. Teresa
© 2015, SpringerVerlag Berlin Heidelberg. The restricted three body problem models the motion of a massless body under the influence of the Newtonian gravitational force caused by two other bodies called the primaries. When they move along circular Keplerian orbits and the third body moves in the same plane, one has the restricted planar circular three body problem (RPC3BP). In suitable coordinates, it is a Hamiltonian system of two degrees of freedom. The conserved energy is usually called the Jacobi constant. Llibre and Simó [Math Ann 248(2):153–184, 1980] proved the existence of oscillatory motions for this system. That is, orbits which leave every bounded region but which return infinitely often to some fixed bounded region. To prove their existence they had to assume the ratio between the masses of the primaries to be small enough. In this paper we prove the existence of such motions for any value of the mass ratio(Formula presented.) closing the problem of existence of oscillatory motions in the RPC3BP. To obtain such motions, we restrict ourselves to the level sets of the Jacobi constant. We show that, for any value of the mass ratio and for large values of the Jacobi constant, there exist transversal intersections between the stable and unstable manifolds of infinity in these level sets. These transversal intersections guarantee the existence of a symbolic dynamics that creates the oscillatory orbits. The main achievement is to prove the existence of these orbits without assuming the mass ratio (Formula presented.) small. When (Formula presented.) is not small, this transversality can not be checked by means of classical perturbation theory. Since our method is valid for all values of v, we are able to detect a curve in the parameter space, formed by (Formula presented.) and the Jacobi constant, where cubic homoclinic tangencies between the invariant manifolds of infinity appear.

El espesor de la calle (traducció)
http://hdl.handle.net/2117/86501
El espesor de la calle (traducció)
Gómez Escoda, Eulalia Maria
Edición de un conjunto de lecturas seleccionadas de autores destacados, en versión castellana, acerca de las calles y vías modernas de nuestras ciudades, precedidas de una Introducción al conjunto de ellas y a cada uno de los autores. Las labores de edición se extienden a la traducción al castellano de 16 de los artículos y la revisión de todos los incluidos.
20160502T17:30:31Z
Gómez Escoda, Eulalia Maria
Edición de un conjunto de lecturas seleccionadas de autores destacados, en versión castellana, acerca de las calles y vías modernas de nuestras ciudades, precedidas de una Introducción al conjunto de ellas y a cada uno de los autores. Las labores de edición se extienden a la traducción al castellano de 16 de los artículos y la revisión de todos los incluidos.

Establishing a method to perform a BPS  Building Performance Simulation
http://hdl.handle.net/2117/86500
Establishing a method to perform a BPS  Building Performance Simulation
Barajas, Luis Matías; López Jiménez, Petra Amparo; Roset Calzada, Jaime
20160502T17:04:56Z
Barajas, Luis Matías
López Jiménez, Petra Amparo
Roset Calzada, Jaime

Cavall Vermell: escultura: Parc de la Farinera, Mollet del Vallès
http://hdl.handle.net/2117/86499
Cavall Vermell: escultura: Parc de la Farinera, Mollet del Vallès
Navas Lorenzo, Francisco Daniel; Solé, Neus
20160502T16:57:56Z
Navas Lorenzo, Francisco Daniel
Solé, Neus

Prediction system for the anticipation of Space Weather events affecting ionosphere and GNSS satellite systems
http://hdl.handle.net/2117/86493
Prediction system for the anticipation of Space Weather events affecting ionosphere and GNSS satellite systems
García Rigo, Alberto; Nuñez, Marlon; Qahwaji, Rami; Ashamari, Omar W; Jiggens, Piers; Pérez, Gustau; Hernández Pajares, Manuel; Hilgers, Alain
The solar activity can be considered one of the main sources of hazards not only affecting launch operations but also the reliability of Global Navigation Satellite Systems (GNSS), such as Galileo, and Satellite Based Augmentation Systems (SBAS), such as EGNOS. Thus, it could impact critically on GNSSbased services, among other impacts on society. In particular, Solar Energetic Particle (SEP) events pose a serious health risk to humans in space and can result in increased radiation doses for highlatitude aircraft flights and can constitute a serious concern for the microelectronics and other hardware elements of satellites, aircraft and launchers. In addition, severe malfunctioning of GNSS and SBAS systems have been reported as well. In this way, nowadays, it shall become a priority to provide GNSS users with predictions and/or warning alerts on potential disturbances associated to increased solar activity. For instance, such predictions or early warnings could allow significant mitigation of the risk of radiation damage by preventive actions and improve of the reliability of GNSS systems.
In this context, the webbased SEPsFLAREs prototype system has been recently deployed to serve as a provider of early warnings and predictions of solar flares and Solar Energetic Particle (SEP) events. The system covers the preflare, postflare/preSEP, and intraSEP scenarios by means of: (1) prediction of solar flares occurrence from 48 to 6hour ahead based on Automated Solar Activity Prediction (ASAP), (2) prediction of the SEP onset and occurrence based on UMASEP predictor and the socalled Warning Tool, and, finally, (3) prediction of the SEP peak and duration once there is evidence of a SEP occurrence.
Regarding the performance of the flare predictor, it has been evaluated considering a dataset from January, 2014 to May, 2014 (with a training period of 32 years). It has been found that the 24hour forecast horizon provides the best performance, with a Probability of Detection (POD), a False Alarm Ratio (FAR) and True Skill Statistics (TSS) estimations of 63.8%, 99.0% and 0.5 respectively for predicting Xclass flares; and of 88.7%, 87.0% and 0.59 respectively, for predicting Mclass flares. Regarding the SEP occurrence and onset prediction, it has been validated taking into account all 129 SEP events from January, 1994 to June, 2014. Then, a POD of 86.82%, a FAR of 25.83%, and an Average Warning Time (AWT) of 3.93 h have been obtained. Regarding the evaluation of the Warning Tool, the best performance has led to a POD of 58.3%, a FAR of 90.1%, and an AWT of 23.1 h. Regarding the SEP flux intensity and duration prediction, taking into account the same input dataset, a Mean Absolute Error (MAE) of SEP peak time predictions of 11.3 h has been obtained, a MAE of peak intensity predictions of 0.53 in log10 units of pfu, and a MAE of SEP end time predictions of 28.8 h.
In addition, SEPsFLAREs system provides as well, from ESA’s MONITOR server, two realtime products on solar flares nowcasting based on ionospheric monitorization by Global Navigation Satellite Systems (GNSS) and a worldwide network of GNSS receivers from the International GNSS Service (IGS): (1) the GNSS Solar Flare Detector (GSFLAD) and (2) the Sunlit Ionosphere Sudden TEC Enhancement Detector (SISTED), both developed by authors of this work.
20160502T15:24:38Z
García Rigo, Alberto
Nuñez, Marlon
Qahwaji, Rami
Ashamari, Omar W
Jiggens, Piers
Pérez, Gustau
Hernández Pajares, Manuel
Hilgers, Alain
The solar activity can be considered one of the main sources of hazards not only affecting launch operations but also the reliability of Global Navigation Satellite Systems (GNSS), such as Galileo, and Satellite Based Augmentation Systems (SBAS), such as EGNOS. Thus, it could impact critically on GNSSbased services, among other impacts on society. In particular, Solar Energetic Particle (SEP) events pose a serious health risk to humans in space and can result in increased radiation doses for highlatitude aircraft flights and can constitute a serious concern for the microelectronics and other hardware elements of satellites, aircraft and launchers. In addition, severe malfunctioning of GNSS and SBAS systems have been reported as well. In this way, nowadays, it shall become a priority to provide GNSS users with predictions and/or warning alerts on potential disturbances associated to increased solar activity. For instance, such predictions or early warnings could allow significant mitigation of the risk of radiation damage by preventive actions and improve of the reliability of GNSS systems.
In this context, the webbased SEPsFLAREs prototype system has been recently deployed to serve as a provider of early warnings and predictions of solar flares and Solar Energetic Particle (SEP) events. The system covers the preflare, postflare/preSEP, and intraSEP scenarios by means of: (1) prediction of solar flares occurrence from 48 to 6hour ahead based on Automated Solar Activity Prediction (ASAP), (2) prediction of the SEP onset and occurrence based on UMASEP predictor and the socalled Warning Tool, and, finally, (3) prediction of the SEP peak and duration once there is evidence of a SEP occurrence.
Regarding the performance of the flare predictor, it has been evaluated considering a dataset from January, 2014 to May, 2014 (with a training period of 32 years). It has been found that the 24hour forecast horizon provides the best performance, with a Probability of Detection (POD), a False Alarm Ratio (FAR) and True Skill Statistics (TSS) estimations of 63.8%, 99.0% and 0.5 respectively for predicting Xclass flares; and of 88.7%, 87.0% and 0.59 respectively, for predicting Mclass flares. Regarding the SEP occurrence and onset prediction, it has been validated taking into account all 129 SEP events from January, 1994 to June, 2014. Then, a POD of 86.82%, a FAR of 25.83%, and an Average Warning Time (AWT) of 3.93 h have been obtained. Regarding the evaluation of the Warning Tool, the best performance has led to a POD of 58.3%, a FAR of 90.1%, and an AWT of 23.1 h. Regarding the SEP flux intensity and duration prediction, taking into account the same input dataset, a Mean Absolute Error (MAE) of SEP peak time predictions of 11.3 h has been obtained, a MAE of peak intensity predictions of 0.53 in log10 units of pfu, and a MAE of SEP end time predictions of 28.8 h.
In addition, SEPsFLAREs system provides as well, from ESA’s MONITOR server, two realtime products on solar flares nowcasting based on ionospheric monitorization by Global Navigation Satellite Systems (GNSS) and a worldwide network of GNSS receivers from the International GNSS Service (IGS): (1) the GNSS Solar Flare Detector (GSFLAD) and (2) the Sunlit Ionosphere Sudden TEC Enhancement Detector (SISTED), both developed by authors of this work.

Performance measures of the SESAR southwest functional airspace block
http://hdl.handle.net/2117/86490
Performance measures of the SESAR southwest functional airspace block
Nava Gaxiola, Cesar Antonio; Barrado Muxí, Cristina
To face the challenges of the increasing air traffic demand the ICAO proposed the Performance Based Approach (PBA) as the methodology to apply for the modernization of the Air Traffic Management (ATM). Improvements for enhancing the en route air traffic efficiency include more direct route options and flexible airspace structures. In Europe airspace structures are fragmented by State boundaries avoiding crossborder sector configurations. Functional Airspace Blocks (FAB) are operational instruments of SESAR to facilitate the implementation of the Essential Operational Changes. In the Southwest FAB the plan to introduce Free Route Airspace (FRA) across States is the main change foreseen. The Southwest FAB comprises Portuguese and Spanish airspaces and with the FRA there will be no longer discrete crossing points. The relevance of SW FAB is due to its geographical situation, being one of the most important interconnection nodes for the American transatlantic flights and the European northernsouthern corridor. In the paper we provide some measures of the expected benefits of introducing the FRA in Southwest FAB. The aim of the measures is to be useful for the performance analysis of the Southwest FAB development and the FRA already started in May 2014.
20160502T14:28:25Z
Nava Gaxiola, Cesar Antonio
Barrado Muxí, Cristina
To face the challenges of the increasing air traffic demand the ICAO proposed the Performance Based Approach (PBA) as the methodology to apply for the modernization of the Air Traffic Management (ATM). Improvements for enhancing the en route air traffic efficiency include more direct route options and flexible airspace structures. In Europe airspace structures are fragmented by State boundaries avoiding crossborder sector configurations. Functional Airspace Blocks (FAB) are operational instruments of SESAR to facilitate the implementation of the Essential Operational Changes. In the Southwest FAB the plan to introduce Free Route Airspace (FRA) across States is the main change foreseen. The Southwest FAB comprises Portuguese and Spanish airspaces and with the FRA there will be no longer discrete crossing points. The relevance of SW FAB is due to its geographical situation, being one of the most important interconnection nodes for the American transatlantic flights and the European northernsouthern corridor. In the paper we provide some measures of the expected benefits of introducing the FRA in Southwest FAB. The aim of the measures is to be useful for the performance analysis of the Southwest FAB development and the FRA already started in May 2014.

Measurement of pesticide spray drift with a specifically designed lidar system
http://hdl.handle.net/2117/86487
Measurement of pesticide spray drift with a specifically designed lidar system
Gregorio, Eduard; Torrent, Xavier; Planas, Santiago; Solanelles, Francesc; Sanz Cortiella, Ricardo; Rocadenbosch Burillo, Francisco; Masip, Joan; Ribes Dasi, Manel; Rosell Polo, Joan Ramon
Field measurements of spray drift are usually carried out by passive collectors and tracers. However, these methods are labour and timeintensive and only provide point and timeintegrated measurements. Unlike these methods, the light detection and ranging (lidar) technique allows realtime measurements, obtaining information with temporal and spatial resolution. Recently, the authors have developed the first eyesafe lidar system specifically designed for spray drift monitoring. This prototype is based on a 1534 erbiumdoped glass laser and an 80 mm diameter telescope, has scanning capability, and is easily transportable. This paper presents the results of the first experimental campaign carried out with this instrument. High coefficient of determination (R2>0.85) were observed by comparing lidar measurements of the spray drift with those obtained by horizontal collectors. Furthermore, the lidar system allowed an assessment of the drift reduction potential (DRP) when comparing lowdrift nozzles with standard ones, resulting in a DRP of 57%(preliminaryresult) for the tested nozzles. The lidar system was also used for monitoring the evolution of the spray flux over the canopy and to generate 2D images of these plumes. The developed instrument is an advantageous alternative to passive collectors and opens the possibility of new methods for field measurement of spray drift.
20160502T13:56:37Z
Gregorio, Eduard
Torrent, Xavier
Planas, Santiago
Solanelles, Francesc
Sanz Cortiella, Ricardo
Rocadenbosch Burillo, Francisco
Masip, Joan
Ribes Dasi, Manel
Rosell Polo, Joan Ramon
Field measurements of spray drift are usually carried out by passive collectors and tracers. However, these methods are labour and timeintensive and only provide point and timeintegrated measurements. Unlike these methods, the light detection and ranging (lidar) technique allows realtime measurements, obtaining information with temporal and spatial resolution. Recently, the authors have developed the first eyesafe lidar system specifically designed for spray drift monitoring. This prototype is based on a 1534 erbiumdoped glass laser and an 80 mm diameter telescope, has scanning capability, and is easily transportable. This paper presents the results of the first experimental campaign carried out with this instrument. High coefficient of determination (R2>0.85) were observed by comparing lidar measurements of the spray drift with those obtained by horizontal collectors. Furthermore, the lidar system allowed an assessment of the drift reduction potential (DRP) when comparing lowdrift nozzles with standard ones, resulting in a DRP of 57%(preliminaryresult) for the tested nozzles. The lidar system was also used for monitoring the evolution of the spray flux over the canopy and to generate 2D images of these plumes. The developed instrument is an advantageous alternative to passive collectors and opens the possibility of new methods for field measurement of spray drift.