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Papers by Francesc Castro

Research paper thumbnail of Reconstructing 2D images with natural neighbour interpolation

The Visual Computer, May 1, 2001

Research paper thumbnail of Mapping online the environmental impact of mining operations in New Brunswick

Ecology and the Environment, Jul 1, 2015

Research paper thumbnail of Geospatial-Enabled RuleML in a Study on Querying Respiratory Disease Information

Research paper thumbnail of Decision support for flood event prediction and monitoring

Research paper thumbnail of Dynamic Laguerre Diagrams Made Easy

European Workshop on Computational Geometry, 2000

Research paper thumbnail of LTE modem power consumption, SAR and RF signal strength emulation

Research paper thumbnail of Air void analysis of hardened concrete by means of photogrammetry

Construction and Building Materials, Nov 1, 2019

Research paper thumbnail of On-line Street Network Analysis for Flood Evacuation Planning

Springer eBooks, Jul 15, 2008

Flooding has been one of the most costly disasters in terms of property damage and human casualti... more Flooding has been one of the most costly disasters in terms of property damage and human casualties. The damage to the infrastructure can also be extensive, and it can endanger flood evacuation efforts. During flooding, emergency managers need to know which evacuation route is safe for their vehicles. In evacuation planning, knowing the water depths on roads and taking into

Research paper thumbnail of The Voronoi Diagram of Half-Balls and its Application to the Prediction of the 3D Structure of Proteins

Research paper thumbnail of Transactions on Computational Science IX

Lecture Notes in Computer Science, 2010

Research paper thumbnail of LTE RF subsystem power consumption modeling

Research paper thumbnail of 3D Partition-Based Clustering for Supply Chain Data Management

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Oct 19, 2015

Research paper thumbnail of Natural and man-made flood risk mapping and warning for socially vulnerable populations

International Journal of Safety and Security Engineering, Sep 30, 2015

Research paper thumbnail of Rf Power Consumption Emulation Optimized With Interval Valued Homotopies

This paper presents a methodology towards the emulation of the electrical power consumption of th... more This paper presents a methodology towards the emulation of the electrical power consumption of the RF device during the cellular phone/handset transmission mode using the LTE technology. The emulation methodology takes the physical environmental variables and the logical interface between the baseband and the RF system as inputs to compute the emulated power dissipation of the RF device. The emulated power, in between the measured points corresponding to the discrete values of the logical interface parameters is computed as a polynomial interpolation using polynomial basis functions. The evaluation of polynomial and spline curve fitting models showed a respective divergence (test error) of 8% and 0.02% from the physically measured power consumption. The precisions of the instruments used for the physical measurements have been modeled as intervals. We have been able to model the power consumption of the RF device operating at 5MHz using homotopy between 2 continuous power consumptio...

Research paper thumbnail of Proceedings - 2011 8th International Symposium on Voronoi Diagrams in Science and Engineering, ISVD 2011: Foreword

link_to_subscribed_fulltex

Research paper thumbnail of Towards Introducing a Geocoding Information System for Greenland

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012

Research paper thumbnail of L'aménagement récréo-touristique à base d'ethologie et d'écologie humaines : le concept de l'archipel de l'Isle-aux-Grues /

Research paper thumbnail of Voronoi Diagram Based Automated Skeleton Extraction from Colour Scanned Maps

2006 3rd International Symposium on Voronoi Diagrams in Science and Engineering, 2006

This paper presents a methodology to automate some parts of the manual digitization process. This... more This paper presents a methodology to automate some parts of the manual digitization process. This includes replacing the manual digitization process by computer assisted skeletonization using scanned paper maps. In colour scanned paper maps various features on the map can be distinguished based on their colour. This research work utilizes the Delaunay triangulation and the Voronoi diagram in order to

Research paper thumbnail of An intelligent and direct manipulation digitizing system

The Voronoi tessellation is of interest in the development of GIS methods for various reasons, es... more The Voronoi tessellation is of interest in the development of GIS methods for various reasons, especially as a form of topology. These reasons include Voronoi diagram dynamic maintenance and the idea of a " proximal query " , whereby an object may be specified merely by placing the cursor within its Voronoi region. This is a great advantage in the digitizing operation, because traditional systems need great care in general i ng t he topological relations. The Voronoi model merely requires the specification of each end point by pointing to its Voronoi " bubble ". Bccausc the topology is maintained during the digitizing activity, ii truly interactive system is possible. unlike the usual " rebuild and then correct the errors " procedure. " Collisions " arc detected before they occur, and action taken, rather than awaiting a batch rebuild. This paper discusses the implications of this approach for the construction of a fast, efficient, interactive, user-friendly and " intelligent " (in the sense of help for geometric construction design and topological accuracy) digitizing system. Emphasis will be placed on the development of effective interaction with the user, and the minimization of digitizing time. R&SUM6 La tessellation Voronoi est d'intCrZt dans k diveloppement de m&odes de SIG pour diverses raisons , sp&ialement en tant que type de topologie. II s'agit de la maintenance dynamique du diagramme Voronoi et du concept de " requite proximale " , par laquelle un objet peut &re sp&ifi6 simplement en plasanf le curseur dans sa rkgion Voronoi. Ceci prksente un grand avantage pour la numCrisation car. les systemes traditionnels nCcessitent beaucoup de pr&aution dans la gt%Cration des relations topologiques. Le systime Voronoi exige simplement la spkcification de chaque extr6mit6 en pointant sa " bulle " Voronoi. Un systeme r&llement interactif est possible, diffirent de la procedure habituelle qui " reconstruit et corrige cons6quemment les erreurs " car, la topologie est maintenue pendant la num&isation. Les " collisions " sont d&&es avant leur apparition et, I'action est prise, plut6t que d'attendre une reconstruction en bloc. Cet article discute des implications de cette approche sur la construction d'un sysdme rapide, efficace, interactif, convivial et " intelligent " (en tant qu'aide g la conception g&m&ique et exactitude topologique). L'accent sera mis sur le dCveloppement d'une interaction reelle avec I'usager et la minimisation du temps de numCrisation. 8 3 4 RESUMEN La tcselaci6n Voronoi es de inter& dentro del desarrollo …

Research paper thumbnail of A certified conflict locator for the incremental maintenance of the Delaunay graph of semi-algebraic sets

Research paper thumbnail of Reconstructing 2D images with natural neighbour interpolation

The Visual Computer, May 1, 2001

Research paper thumbnail of Mapping online the environmental impact of mining operations in New Brunswick

Ecology and the Environment, Jul 1, 2015

Research paper thumbnail of Geospatial-Enabled RuleML in a Study on Querying Respiratory Disease Information

Research paper thumbnail of Decision support for flood event prediction and monitoring

Research paper thumbnail of Dynamic Laguerre Diagrams Made Easy

European Workshop on Computational Geometry, 2000

Research paper thumbnail of LTE modem power consumption, SAR and RF signal strength emulation

Research paper thumbnail of Air void analysis of hardened concrete by means of photogrammetry

Construction and Building Materials, Nov 1, 2019

Research paper thumbnail of On-line Street Network Analysis for Flood Evacuation Planning

Springer eBooks, Jul 15, 2008

Flooding has been one of the most costly disasters in terms of property damage and human casualti... more Flooding has been one of the most costly disasters in terms of property damage and human casualties. The damage to the infrastructure can also be extensive, and it can endanger flood evacuation efforts. During flooding, emergency managers need to know which evacuation route is safe for their vehicles. In evacuation planning, knowing the water depths on roads and taking into

Research paper thumbnail of The Voronoi Diagram of Half-Balls and its Application to the Prediction of the 3D Structure of Proteins

Research paper thumbnail of Transactions on Computational Science IX

Lecture Notes in Computer Science, 2010

Research paper thumbnail of LTE RF subsystem power consumption modeling

Research paper thumbnail of 3D Partition-Based Clustering for Supply Chain Data Management

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Oct 19, 2015

Research paper thumbnail of Natural and man-made flood risk mapping and warning for socially vulnerable populations

International Journal of Safety and Security Engineering, Sep 30, 2015

Research paper thumbnail of Rf Power Consumption Emulation Optimized With Interval Valued Homotopies

This paper presents a methodology towards the emulation of the electrical power consumption of th... more This paper presents a methodology towards the emulation of the electrical power consumption of the RF device during the cellular phone/handset transmission mode using the LTE technology. The emulation methodology takes the physical environmental variables and the logical interface between the baseband and the RF system as inputs to compute the emulated power dissipation of the RF device. The emulated power, in between the measured points corresponding to the discrete values of the logical interface parameters is computed as a polynomial interpolation using polynomial basis functions. The evaluation of polynomial and spline curve fitting models showed a respective divergence (test error) of 8% and 0.02% from the physically measured power consumption. The precisions of the instruments used for the physical measurements have been modeled as intervals. We have been able to model the power consumption of the RF device operating at 5MHz using homotopy between 2 continuous power consumptio...

Research paper thumbnail of Proceedings - 2011 8th International Symposium on Voronoi Diagrams in Science and Engineering, ISVD 2011: Foreword

link_to_subscribed_fulltex

Research paper thumbnail of Towards Introducing a Geocoding Information System for Greenland

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012

Research paper thumbnail of L'aménagement récréo-touristique à base d'ethologie et d'écologie humaines : le concept de l'archipel de l'Isle-aux-Grues /

Research paper thumbnail of Voronoi Diagram Based Automated Skeleton Extraction from Colour Scanned Maps

2006 3rd International Symposium on Voronoi Diagrams in Science and Engineering, 2006

This paper presents a methodology to automate some parts of the manual digitization process. This... more This paper presents a methodology to automate some parts of the manual digitization process. This includes replacing the manual digitization process by computer assisted skeletonization using scanned paper maps. In colour scanned paper maps various features on the map can be distinguished based on their colour. This research work utilizes the Delaunay triangulation and the Voronoi diagram in order to

Research paper thumbnail of An intelligent and direct manipulation digitizing system

The Voronoi tessellation is of interest in the development of GIS methods for various reasons, es... more The Voronoi tessellation is of interest in the development of GIS methods for various reasons, especially as a form of topology. These reasons include Voronoi diagram dynamic maintenance and the idea of a " proximal query " , whereby an object may be specified merely by placing the cursor within its Voronoi region. This is a great advantage in the digitizing operation, because traditional systems need great care in general i ng t he topological relations. The Voronoi model merely requires the specification of each end point by pointing to its Voronoi " bubble ". Bccausc the topology is maintained during the digitizing activity, ii truly interactive system is possible. unlike the usual " rebuild and then correct the errors " procedure. " Collisions " arc detected before they occur, and action taken, rather than awaiting a batch rebuild. This paper discusses the implications of this approach for the construction of a fast, efficient, interactive, user-friendly and " intelligent " (in the sense of help for geometric construction design and topological accuracy) digitizing system. Emphasis will be placed on the development of effective interaction with the user, and the minimization of digitizing time. R&SUM6 La tessellation Voronoi est d'intCrZt dans k diveloppement de m&odes de SIG pour diverses raisons , sp&ialement en tant que type de topologie. II s'agit de la maintenance dynamique du diagramme Voronoi et du concept de " requite proximale " , par laquelle un objet peut &re sp&ifi6 simplement en plasanf le curseur dans sa rkgion Voronoi. Ceci prksente un grand avantage pour la numCrisation car. les systemes traditionnels nCcessitent beaucoup de pr&aution dans la gt%Cration des relations topologiques. Le systime Voronoi exige simplement la spkcification de chaque extr6mit6 en pointant sa " bulle " Voronoi. Un systeme r&llement interactif est possible, diffirent de la procedure habituelle qui " reconstruit et corrige cons6quemment les erreurs " car, la topologie est maintenue pendant la num&isation. Les " collisions " sont d&&es avant leur apparition et, I'action est prise, plut6t que d'attendre une reconstruction en bloc. Cet article discute des implications de cette approche sur la construction d'un sysdme rapide, efficace, interactif, convivial et " intelligent " (en tant qu'aide g la conception g&m&ique et exactitude topologique). L'accent sera mis sur le dCveloppement d'une interaction reelle avec I'usager et la minimisation du temps de numCrisation. 8 3 4 RESUMEN La tcselaci6n Voronoi es de inter& dentro del desarrollo …

Research paper thumbnail of A certified conflict locator for the incremental maintenance of the Delaunay graph of semi-algebraic sets