Resumen Este trabajo complementa y amplia nuestros trabajos anteriores sobre generación de prueba... more Resumen Este trabajo complementa y amplia nuestros trabajos anteriores sobre generación de pruebas a partir de casos de uso presentando un proceso que, de manera sistemática y automática, permite generar objetivos de prueba a partir de casos de uso ...
En este artículo se presenta una revisión de los principales lenguajes basados en XML para la des... more En este artículo se presenta una revisión de los principales lenguajes basados en XML para la descripción de interfaces de usuario independientes del dispositivo, realizando una comparativa entre ellos y destacando su relación con el proceso de modelado de interfaces de usuario basado en modelos declarativos y sus fases o niveles de abstracción.
Resumen. La usabilidad de los Sistemas Interactivos se reconoce ya como una componente fundamenta... more Resumen. La usabilidad de los Sistemas Interactivos se reconoce ya como una componente fundamental del éxito de estos sistemas. Para garantizar la usabilidad, las organizaciones de desarrollo de software deben considerar la aplicación de procesos de Diseño Centrados en el Usuario (DCU). Sin embargo, existen inconvenientes que dificultan la aplicación de estos procesos por parte de las organizaciones de desarrollo
Uno de los aspectos más importantes que aparecen en el entorno de la Web es la navegación. La nav... more Uno de los aspectos más importantes que aparecen en el entorno de la Web es la navegación. La navegación lleva asociada la idea de moverse por un espacio de información, donde es crucial el concepto de posición actual o contexto, ya que muchas veces, el siguiente paso a dar mientras se navega dependerá de qué pasos se hayan dado antes. Esta importancia de la navegación se constata en el tratamiento que se le da en las metodologías de diseño web (OOHDM, RMM, etc.). Sin embargo, si analizamos cómo se plantea el estudio de la navegación en estas metodologías veremos que en la mayoría de los casos estas propuestas tratan el aspecto de la navegación sólo en la fase de diseño, sin entrar a analizar como se especifica o analiza la navegación. El objetivo de este trabajo es presentar NDT (Navigational Development Tecnique), una técnica que permite realizar la especificación, el análisis y el diseño de la navegación de un sistema.
Resumen En este artículo se propone una metodología para razonar sobre los modelos semicualitativ... more Resumen En este artículo se propone una metodología para razonar sobre los modelos semicualitativos construidos para sistemas dinámicos con conocimiento cualitativo y cuantitativo. La información cualitativa de estos sistemas puede componerse de: operadores cualitativos, etiquetas cualitativas, funciones de bandas y funciones continuas cualitativas. Se presenta un formalismo para incorporar esta información a los modelos. La metodología propuesta permite estudiar no sólo del régimen estacionario, ampliamente ...
Proceedings of SPIE - The International Society for Optical Engineering
In typical case 2 waters an accurate remote sensing retrieval of chlorophyll a (chla) is still ch... more In typical case 2 waters an accurate remote sensing retrieval of chlorophyll a (chla) is still challenging. There is a widespread understanding that universally applicable water constituent retrieval algorithms are currently not feasible, shifting the research focus to regionally specific implementations of powerful inversion methods. This study takes advantage of regionally specific chlorophyll a (chla) algorithms, which were developed by the authors of this abstract in previous works, and the characteristics of Medium Resolution Imaging Spectrometer (MERIS) in order to study harmful algal events in the optically complex waters of the Galician Rias (NW). Harmful algal events are a frequent phenomenon in this area with direct and indirect impacts to the mussel production that constitute a very important economic activity for the local community. More than 240 106 kg of mussel per year are produced in these highly primary productive upwelling systems. A MERIS archive from nine years ...
Phytoplanktonic blooms in the coastal embayments (rias) at the NW part of Spain were mentioned fo... more Phytoplanktonic blooms in the coastal embayments (rias) at the NW part of Spain were mentioned for the first time in 1918 and since then they have been associated numerous times with negatives impacts to a very important economic activity in the area, mussel production. In this study, eight years of Pseudo-nitzschia spp. abundance and associated meteorological and oceanographic data were used to develop and validate support vector machine (SVM) models for the prediction of these diatoms.SVM were used to identify presence/below low detection limit, bloom/no bloom conditions of Pseudo-nitzschia spp. and finally to predict blooms due to these diatoms in the coastal systems of the Galician rias. The best SVM models were selected on the basis of C and γ parameters and their performance was evaluated in terms of accuracy and kappa statistics (κ). Regarding the presence/below low detection limit, bloom/no bloom models the best results in the validation dataset were achieved using all the v...
In typical Case 2 waters, accurate remote sensing retrieval of chlorophyll a (chla) is still a ch... more In typical Case 2 waters, accurate remote sensing retrieval of chlorophyll a (chla) is still a challenging task. In this study, focusing on the Galician rias (ΝW Spain), algorithms based on neural network (NN) techniques were developed for the retrieval of chla concentration in optically complex waters, using Medium Resolution Imaging Spectrometer (MERIS) data. There is considerable interest in the accurate estimation of chla for the Galician rias, because of the economic and social importance of the extensive culture of mussels, and the high frequency of harmful algal events. Fifteen MERIS full resolution (FR) cloud-free images paired with in situ chla data (for 2002–2004 and 2006–2008) were used for the development and validation of the NN. The scope of NN was established from the clusters obtained using fuzzy c-mean (FCM) clustering techniques applied to the satellite-derived data. Three different NNs were developed: one including the whole data set, and two others using only poi...
This study takes advantage of a regionally specific algorithm and the characteristics of Medium R... more This study takes advantage of a regionally specific algorithm and the characteristics of Medium Resolution Imaging Spectrometer (MERIS) in order to deliver more accurate, detailed chlorophyll a (chla) maps of optically complex coastal waters during an upwelling cycle. MERIS full resolution chla concentrations and in situ data were obtained on the Galician (NW Spain) shelf and in three adjacent rias (embayments), sites of extensive mussel culture that experience frequent harmful algal events. Regionally focused algorithms (Regional neural network for rias Baixas or NNRB) for the retrieval of chla in the Galician rias optically complex waters were tested in comparison to sea-truth data. The one that showed the best performance was applied to a series of six MERIS (FR) images during a summer upwelling cycle to test its performance. The best performance parameters were given for the NN trained with high-quality data using the most abundant cluster found in the rias after the application...
In this study an neural network-based algorithm was developed in the framework of the projects &q... more In this study an neural network-based algorithm was developed in the framework of the projects "PROFIT-PGIDIT07REM014E" and "INCITE 2007 FIT120000-2007-137" in collaboration with the Fishing Vessel Owners' Cooperative of the Port of Vigo (ARVI) in order to predict and optimize the fishing vessels route. Data were provided from six fishing ships operating in different fishing grounds around the world. The adapted to the characteristics of each ship model is fed with environmental variables such as wave height, surface currents speed and wind stress, which are considered to be important for the ships route. The environmental variables were obtained from the Ocean model MERCATOR and satellite data. The results showed that our predicted route and speed vessel, in addition to near real time data of environmental conditions, can be used to increase the energetic efficiency of the ships.
In typical case 2 waters an accurate remote sensing retrieval of chlorophyll a (chla) is still ch... more In typical case 2 waters an accurate remote sensing retrieval of chlorophyll a (chla) is still challeng-ing. There is a widespread understanding that universally applicable water constituent retrieval al-gorithms are currently not feasible, shifting the research focus to regionally specific implementa-tions of powerful inversion methods. In this study a series of algorithms for the retrieval of chloro-phyll a in the Galician rias (NW Spain) from MERIS full resolution data were developed based on Multilayer perceptron (MLP) artificial neural networks and fuzzy c-mean clustering techniques (FCM) using different quality levels. The quality levels were given to the data set as a function of quality flags. All the NNs developed in this study showed high R2 and low root mean square error (RMSE) values in both training and validation sets. The algorithms were applied to six MERIS im-ages delivered from the area at July 2008, in order to create chla maps. The best performance pa-rameters we...
Journal of the Marine Biological Association of the United Kingdom, 2010
Since mid-2003, systematic monthly sightings surveys for cetaceans have been carried out in Galic... more Since mid-2003, systematic monthly sightings surveys for cetaceans have been carried out in Galicia (north-west Spain) from observation points around the coastline, with the aim of providing baseline data on cetacean distribution and habitat use to underpin future conservation measures. Here we summarize results for September 2003 to October 2007. The most frequently recorded species were the bottlenose dolphin (Tursiops truncatus, seen during 10.7% of observation periods), common dolphin (Delphinus delphis, 3.7%), harbour porpoise (Phocoena phocoena, 1.6%), Risso's dolphin (Grampus griseus, 0.4%) and short-finned pilot whale (Globicephala melas, 0.2%). The three most common species showed different distribution patterns along the coast. In terms of habitat preferences, bottlenose dolphins were seen to be associated with more productive areas (areas with higher chlorophyll-a concentrations) where the continental shelf was wider while both common dolphins and harbour porpoises were seen most frequently in less productive areas where the continental shelf is narrowest. Possible reasons for differences in habitat use include differing diets. In Galician waters, all three main cetacean species feed primarily on fish that are common in shelf waters, and in the case of blue whiting (the most important species in the stomach contents of common and bottlenose dolphins) abundant also on the slope. All three cetaceans feed on blue whiting while scad is important in diets of common dolphin and porpoise. It is also possible that porpoises do not use areas frequented by bottlenose dolphins in order to avoid aggressive interactions. Retrospective evaluation of the sampling regime, using data from the 2500 observation periods during [2003][2004][2005][2006][2007] suggests that the overall sightings rates for all species (taking into account observation time and between-site travel time) would be higher if average observation duration was increased to at least 40 minutes. On the other hand, confidence limits on sightings rates stabilized after around 1000 observation periods, suggesting that the number of sites visited or the frequency of visits could be substantially reduced.
Infectious pancreatic necrosis virus (IPNV) is a birnavirus that causes a lethal disease in both ... more Infectious pancreatic necrosis virus (IPNV) is a birnavirus that causes a lethal disease in both hatchery-reared juvenile salmonids and other non-salmonid fishes. IPNV has been classified into seven genogroups based on the analysis of the VP2/NS junction region of the viral A RNA segment. Ten organisms from two trout-rearing farms were used for viral isolation in RTG-2 cells. Cells were inoculated with samples from spleen, kidneys and pyloric caeca. The viral isolate was initially identified by electron microscopy, and confirmed by a commercial ELISA, RT-PCR and sequencing. A phylogenetic tree was constructed based on the deduced amino acids sequence of VP2. An IPNV genogroup 1, labeled as EdoMex07, was isolated from a pool of renal tissues of five asymptomatic trout. The amino acid sequence analysis of VP2 showed that this IPNV presented the putative VP2 residue (221) already described in asymptomatic trout carriers. The EdoMex07 IPNV isolate belongs to genogroup 1, and has a VP2 phenotype which has been suggested to be involved in the establishment of the carrier state. This EdoMex07 IPNV is currently used as the standard positive control for detection of IPNV in rainbow trout farms in Mexico.
Resumen Este trabajo complementa y amplia nuestros trabajos anteriores sobre generación de prueba... more Resumen Este trabajo complementa y amplia nuestros trabajos anteriores sobre generación de pruebas a partir de casos de uso presentando un proceso que, de manera sistemática y automática, permite generar objetivos de prueba a partir de casos de uso ...
En este artículo se presenta una revisión de los principales lenguajes basados en XML para la des... more En este artículo se presenta una revisión de los principales lenguajes basados en XML para la descripción de interfaces de usuario independientes del dispositivo, realizando una comparativa entre ellos y destacando su relación con el proceso de modelado de interfaces de usuario basado en modelos declarativos y sus fases o niveles de abstracción.
Resumen. La usabilidad de los Sistemas Interactivos se reconoce ya como una componente fundamenta... more Resumen. La usabilidad de los Sistemas Interactivos se reconoce ya como una componente fundamental del éxito de estos sistemas. Para garantizar la usabilidad, las organizaciones de desarrollo de software deben considerar la aplicación de procesos de Diseño Centrados en el Usuario (DCU). Sin embargo, existen inconvenientes que dificultan la aplicación de estos procesos por parte de las organizaciones de desarrollo
Uno de los aspectos más importantes que aparecen en el entorno de la Web es la navegación. La nav... more Uno de los aspectos más importantes que aparecen en el entorno de la Web es la navegación. La navegación lleva asociada la idea de moverse por un espacio de información, donde es crucial el concepto de posición actual o contexto, ya que muchas veces, el siguiente paso a dar mientras se navega dependerá de qué pasos se hayan dado antes. Esta importancia de la navegación se constata en el tratamiento que se le da en las metodologías de diseño web (OOHDM, RMM, etc.). Sin embargo, si analizamos cómo se plantea el estudio de la navegación en estas metodologías veremos que en la mayoría de los casos estas propuestas tratan el aspecto de la navegación sólo en la fase de diseño, sin entrar a analizar como se especifica o analiza la navegación. El objetivo de este trabajo es presentar NDT (Navigational Development Tecnique), una técnica que permite realizar la especificación, el análisis y el diseño de la navegación de un sistema.
Resumen En este artículo se propone una metodología para razonar sobre los modelos semicualitativ... more Resumen En este artículo se propone una metodología para razonar sobre los modelos semicualitativos construidos para sistemas dinámicos con conocimiento cualitativo y cuantitativo. La información cualitativa de estos sistemas puede componerse de: operadores cualitativos, etiquetas cualitativas, funciones de bandas y funciones continuas cualitativas. Se presenta un formalismo para incorporar esta información a los modelos. La metodología propuesta permite estudiar no sólo del régimen estacionario, ampliamente ...
Proceedings of SPIE - The International Society for Optical Engineering
In typical case 2 waters an accurate remote sensing retrieval of chlorophyll a (chla) is still ch... more In typical case 2 waters an accurate remote sensing retrieval of chlorophyll a (chla) is still challenging. There is a widespread understanding that universally applicable water constituent retrieval algorithms are currently not feasible, shifting the research focus to regionally specific implementations of powerful inversion methods. This study takes advantage of regionally specific chlorophyll a (chla) algorithms, which were developed by the authors of this abstract in previous works, and the characteristics of Medium Resolution Imaging Spectrometer (MERIS) in order to study harmful algal events in the optically complex waters of the Galician Rias (NW). Harmful algal events are a frequent phenomenon in this area with direct and indirect impacts to the mussel production that constitute a very important economic activity for the local community. More than 240 106 kg of mussel per year are produced in these highly primary productive upwelling systems. A MERIS archive from nine years ...
Phytoplanktonic blooms in the coastal embayments (rias) at the NW part of Spain were mentioned fo... more Phytoplanktonic blooms in the coastal embayments (rias) at the NW part of Spain were mentioned for the first time in 1918 and since then they have been associated numerous times with negatives impacts to a very important economic activity in the area, mussel production. In this study, eight years of Pseudo-nitzschia spp. abundance and associated meteorological and oceanographic data were used to develop and validate support vector machine (SVM) models for the prediction of these diatoms.SVM were used to identify presence/below low detection limit, bloom/no bloom conditions of Pseudo-nitzschia spp. and finally to predict blooms due to these diatoms in the coastal systems of the Galician rias. The best SVM models were selected on the basis of C and γ parameters and their performance was evaluated in terms of accuracy and kappa statistics (κ). Regarding the presence/below low detection limit, bloom/no bloom models the best results in the validation dataset were achieved using all the v...
In typical Case 2 waters, accurate remote sensing retrieval of chlorophyll a (chla) is still a ch... more In typical Case 2 waters, accurate remote sensing retrieval of chlorophyll a (chla) is still a challenging task. In this study, focusing on the Galician rias (ΝW Spain), algorithms based on neural network (NN) techniques were developed for the retrieval of chla concentration in optically complex waters, using Medium Resolution Imaging Spectrometer (MERIS) data. There is considerable interest in the accurate estimation of chla for the Galician rias, because of the economic and social importance of the extensive culture of mussels, and the high frequency of harmful algal events. Fifteen MERIS full resolution (FR) cloud-free images paired with in situ chla data (for 2002–2004 and 2006–2008) were used for the development and validation of the NN. The scope of NN was established from the clusters obtained using fuzzy c-mean (FCM) clustering techniques applied to the satellite-derived data. Three different NNs were developed: one including the whole data set, and two others using only poi...
This study takes advantage of a regionally specific algorithm and the characteristics of Medium R... more This study takes advantage of a regionally specific algorithm and the characteristics of Medium Resolution Imaging Spectrometer (MERIS) in order to deliver more accurate, detailed chlorophyll a (chla) maps of optically complex coastal waters during an upwelling cycle. MERIS full resolution chla concentrations and in situ data were obtained on the Galician (NW Spain) shelf and in three adjacent rias (embayments), sites of extensive mussel culture that experience frequent harmful algal events. Regionally focused algorithms (Regional neural network for rias Baixas or NNRB) for the retrieval of chla in the Galician rias optically complex waters were tested in comparison to sea-truth data. The one that showed the best performance was applied to a series of six MERIS (FR) images during a summer upwelling cycle to test its performance. The best performance parameters were given for the NN trained with high-quality data using the most abundant cluster found in the rias after the application...
In this study an neural network-based algorithm was developed in the framework of the projects &q... more In this study an neural network-based algorithm was developed in the framework of the projects "PROFIT-PGIDIT07REM014E" and "INCITE 2007 FIT120000-2007-137" in collaboration with the Fishing Vessel Owners' Cooperative of the Port of Vigo (ARVI) in order to predict and optimize the fishing vessels route. Data were provided from six fishing ships operating in different fishing grounds around the world. The adapted to the characteristics of each ship model is fed with environmental variables such as wave height, surface currents speed and wind stress, which are considered to be important for the ships route. The environmental variables were obtained from the Ocean model MERCATOR and satellite data. The results showed that our predicted route and speed vessel, in addition to near real time data of environmental conditions, can be used to increase the energetic efficiency of the ships.
In typical case 2 waters an accurate remote sensing retrieval of chlorophyll a (chla) is still ch... more In typical case 2 waters an accurate remote sensing retrieval of chlorophyll a (chla) is still challeng-ing. There is a widespread understanding that universally applicable water constituent retrieval al-gorithms are currently not feasible, shifting the research focus to regionally specific implementa-tions of powerful inversion methods. In this study a series of algorithms for the retrieval of chloro-phyll a in the Galician rias (NW Spain) from MERIS full resolution data were developed based on Multilayer perceptron (MLP) artificial neural networks and fuzzy c-mean clustering techniques (FCM) using different quality levels. The quality levels were given to the data set as a function of quality flags. All the NNs developed in this study showed high R2 and low root mean square error (RMSE) values in both training and validation sets. The algorithms were applied to six MERIS im-ages delivered from the area at July 2008, in order to create chla maps. The best performance pa-rameters we...
Journal of the Marine Biological Association of the United Kingdom, 2010
Since mid-2003, systematic monthly sightings surveys for cetaceans have been carried out in Galic... more Since mid-2003, systematic monthly sightings surveys for cetaceans have been carried out in Galicia (north-west Spain) from observation points around the coastline, with the aim of providing baseline data on cetacean distribution and habitat use to underpin future conservation measures. Here we summarize results for September 2003 to October 2007. The most frequently recorded species were the bottlenose dolphin (Tursiops truncatus, seen during 10.7% of observation periods), common dolphin (Delphinus delphis, 3.7%), harbour porpoise (Phocoena phocoena, 1.6%), Risso's dolphin (Grampus griseus, 0.4%) and short-finned pilot whale (Globicephala melas, 0.2%). The three most common species showed different distribution patterns along the coast. In terms of habitat preferences, bottlenose dolphins were seen to be associated with more productive areas (areas with higher chlorophyll-a concentrations) where the continental shelf was wider while both common dolphins and harbour porpoises were seen most frequently in less productive areas where the continental shelf is narrowest. Possible reasons for differences in habitat use include differing diets. In Galician waters, all three main cetacean species feed primarily on fish that are common in shelf waters, and in the case of blue whiting (the most important species in the stomach contents of common and bottlenose dolphins) abundant also on the slope. All three cetaceans feed on blue whiting while scad is important in diets of common dolphin and porpoise. It is also possible that porpoises do not use areas frequented by bottlenose dolphins in order to avoid aggressive interactions. Retrospective evaluation of the sampling regime, using data from the 2500 observation periods during [2003][2004][2005][2006][2007] suggests that the overall sightings rates for all species (taking into account observation time and between-site travel time) would be higher if average observation duration was increased to at least 40 minutes. On the other hand, confidence limits on sightings rates stabilized after around 1000 observation periods, suggesting that the number of sites visited or the frequency of visits could be substantially reduced.
Infectious pancreatic necrosis virus (IPNV) is a birnavirus that causes a lethal disease in both ... more Infectious pancreatic necrosis virus (IPNV) is a birnavirus that causes a lethal disease in both hatchery-reared juvenile salmonids and other non-salmonid fishes. IPNV has been classified into seven genogroups based on the analysis of the VP2/NS junction region of the viral A RNA segment. Ten organisms from two trout-rearing farms were used for viral isolation in RTG-2 cells. Cells were inoculated with samples from spleen, kidneys and pyloric caeca. The viral isolate was initially identified by electron microscopy, and confirmed by a commercial ELISA, RT-PCR and sequencing. A phylogenetic tree was constructed based on the deduced amino acids sequence of VP2. An IPNV genogroup 1, labeled as EdoMex07, was isolated from a pool of renal tissues of five asymptomatic trout. The amino acid sequence analysis of VP2 showed that this IPNV presented the putative VP2 residue (221) already described in asymptomatic trout carriers. The EdoMex07 IPNV isolate belongs to genogroup 1, and has a VP2 phenotype which has been suggested to be involved in the establishment of the carrier state. This EdoMex07 IPNV is currently used as the standard positive control for detection of IPNV in rainbow trout farms in Mexico.
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