Spatial and temporal analysis of the seasonal and interannual variability in the tropical Pacific simulated with a coupled GCM

In the first part of this work, the dominant time scales that explain the tropical variability of the first SINTEX simulation (ECHAM4(T30)-ORCA) are identified through a spectral analysis. Higher order spectral analysis is used to examine the interactions among these time scales. The time series analyzed are an average of sea surface temperature over the Niño3 region. The time scales obtained are compared with those identified in another coupled GCM simulation (ECHAM4(T42)-OPYC3). The higher importance of the biannual time scale in this last is explained partly by the strength of the coupling between the annual and the biannual time scales. There is no such strong coupling in the SINTEX simulation. Important differences among the generation of the simulated warm (or cold) event suggest the need of a systematic classification to isolate their relevant features. Therefore in the second part of this work, we address this problem. A space-time cluster analysis is performed on a data set built by collecting the values of the heat content anomalies in the tropical Pacific region, in the fifteen months previous to a peak in the Niño3 Index that has been identified as a ‘warm’ (or ‘cold’) event. In the case of the warm events, three types of generation schemes are found. In two of them, there are anomalies of heat content in the west, north and south of the equator, more than nine months before the events start. In the third case, the anomalies appear and grow in the central equatorial Pacific. Only two types are needed to classify the generation of cold events. Negative sea level height anomalies appear six months before the Niño3 Index reaches the (local) minimum. They are located north of the equator in one of the groups, and south of it in the other. Some of these characteristic traits also appear in observations of warm and cold events

Spatial and temporal analysis of the seasonal and interannual variability in the tropical Pacific simulated with a coupled GCM

In the first part of this work, the dominant time scales that explain the tropical variability of the first SINTEX simulation (ECHAM4(T30)-ORCA) are identified through a spectral analysis. Higher order spectral analysis is used to examine the interactions among these time scales. The time series analyzed are an average of sea surface temperature over the Niño3 region. The time scales obtained are compared with those identified in another coupled GCM simulation (ECHAM4(T42)-OPYC3). The higher importance of the biannual time scale in this last is explained partly by the strength of the coupling between the annual and the biannual time scales. There is no such strong coupling in the SINTEX simulation. Important differences among the generation of the simulated warm (or cold) event suggest the need of a systematic classification to isolate their relevant features. Therefore in the second part of this work, we address this problem. A space-time cluster analysis is performed on a data set built by collecting the values of the heat content anomalies in the tropical Pacific region, in the fifteen months previous to a peak in the Niño3 Index that has been identified as a ‘warm’ (or ‘cold’) event. In the case of the warm events, three types of generation schemes are found. In two of them, there are anomalies of heat content in the west, north and south of the equator, more than nine months before the events start. In the third case, the anomalies appear and grow in the central equatorial Pacific. Only two types are needed to classify the generation of cold events. Negative sea level height anomalies appear six months before the Niño3 Index reaches the (local) minimum. They are located north of the equator in one of the groups, and south of it in the other. Some of these characteristic traits also appear in observations of warm and cold events

Scale interactions in the tropical Atlanticvariability simulated with a coupled GCM

Warm and cold events in the Gulf of Guinea are an important feature in the interannual variability of the tropical Atlantic Ocean, and partly a manifestation of the equatorial Atlantic system's intrinsic variability. Due to the relatively reduced zonal extension of this ocean, the latter variability is comparatively weak and thus strongly modified by other factors at play, either local or remote, like the seasonal cycle or ENSO. We present here an analysis of the tropical Atlantic variability in a 100-year-long chunk of the output of a coupled GCM. Through it, we obtain a better understanding of this variability and of its interactions with the seasonal cycle and with the ENSO signal. Following hints in the observations, we separate warm or cold events of the simulation in a few types, according to their similarities and differences. This classification is carried out as a spatio-temporal cluster analysis of the values, from nine months before up to the peak of the event, of the heat content anomalies. This is an optimal variable to monitor the generation of the events. One of the warm event classes can be explained by ENSO interactions. One of the cold event types can be explained by this influence as well, while the seasonal interactions might explain the characteristics of another of them

Using WordNet relations and semantic classes in information retrieval tasks

In this paper we explore the use of semantic classes in an existing information retrieval system in order to improve its results. Thus, we use two different ontologies of semantic classes (WordNet domain and Basic Level Concepts) in order to re-rank the retrieved documents and obtain better recall and precision. Finally, we implement a new method for weighting the expanded terms taking into account the weights of the original query terms and their relations in WordNet with respect to the new ones (which have demonstrated to improve the results). The evaluation of these approaches was carried out in the CLEF Robust-WSD Task, obtaining an improvement of 1.8% in GMAP for the semantic classes approach and 10% in MAP employing the WordNet term weighting approach.This paper has been partially supported by the Spanish government, project TIN-2006-15265-C06-01 and by the framework of the project QALL-ME, which is a 6th Framework Research Programme of the European Union (EU), contract number: FP6-IST-033860 and by the University of Comahue under the project 04/E062

Spatial and temporal analysis of the seasonal and interannual variability in the tropical Pacific simulated with a coupled GCM

In the first part of this work, the dominant time scales that explain the tropical variability of the first SINTEX
 simulation (ECHAM4(T30)-ORCA) are identified through a spectral analysis. Higher order spectral analysis is
 used to examine the interactions among these time scales. The time series analyzed are an average of sea surface
 temperature over the Niño3 region. The time scales obtained are compared with those identified in another coupled
 GCM simulation (ECHAM4(T42)-OPYC3). The higher importance of the biannual time scale in this last is explained partly by the strength of the coupling between the annual and the biannual time scales. There is no such strong coupling in the SINTEX simulation. Important differences among the generation of the simulated warm (or cold) event suggest the need of a systematic classification to isolate their relevant features. Therefore in the second part of this work, we address this problem. A space-time cluster analysis is performed on a data set built by collecting the values of the heat content anomalies in the tropical Pacific region, in the fifteen months previous to a peak in the Niño3 Index that has been identified as a ?warm? (or ?cold?) event. In the case of the warm events,
 three types of generation schemes are found. In two of them, there are anomalies of heat content in the west, north
 and south of the equator, more than nine months before the events start. In the third case, the anomalies appear and
 grow in the central equatorial Pacific. Only two types are needed to classify the generation of cold events. Negative
 sea level height anomalies appear six months before the Niño3 Index reaches the (local) minimum. They are located north of the equator in one of the groups, and south of it in the other. Some of these characteristic traits also appear in observations of warm and cold events

Handling spatial dimension in text and its application to information retrieval

Proyecto emergente centrado en la desambiguación de topónimos y la detección del foco geográfico en el texto. La finalidad es mejorar el rendimiento de los sistemas de recuperación de información geográfica. Se describen los problemas abordados, la hipótesis de trabajo, las tareas a realizar y los objetivos parciales alcanzados.This project is focused on toponym disambiguation and geographical focus identification in text. The goal is to improve the performance of geographic information retrieval systems. This paper describes the problems faced, working hypothesis, tasks proposed and goals currently achieved

Neuromechanical evaluation of human gait in people with Charcot-Marie-Tooth syndrome: a preliminary study

La enfermedad de Charcot-Marie-Tooth es un grupo de trastornos neurológicos hereditarios que afecta a los nervios periféricos y, por regla general, se manifiesta inicialmente con debilidad y deformaciones en las piernas. Aunque esta no sea necesariamente la única parte afectada es la más degenerada en el transcurso del tiempo lo cual, provoca consecuencias patológicas en la marcha. Por este motivo, en este estudio se ha realizado una evaluación neuromecánica de la marcha sobre este tipo de pacientes para construir representaciones gráficas y simulaciones de la locomoción con los que comprender mejor los movimientos y la actividad electromiográfica que caracterizan el trastorno y con ello, aportar conocimiento con el que abordar ayudas y mejorar la calidad de vida en personas con esta patología.Charcot-Marie-Tooth syndrome is a group of hereditary neurological conditions affecting the peripheral nerves and, as a general rule, initially manifesting with weakness and deformity of the legs. Although the lower limbs are not the only affected body part, they are commonly the most degenerate in time, causing pathological effects in the patient’s gait. For this reason, in this study, a neuromechanical evaluation of gait on this type of individuals has been performed to construct graphical representations and simulations of locomotion and better understand pathological movement and electromyographic activity that characterizes this condition and, from there, provide knowledge of how to address assistance and improvement of quality of life of people with this pathology

Análisis de la satisfacción del paciente a partir de comentarios online escritos en holandés y en español

Sentiment Analysis is a well-known task of Natural Language Processing that has been studied in different domains such as movies, phones or hotels. However, other areas like medical domain remain yet unexplored. In this paper we study different polarity classification techniques applied on health domain. We present a corpus of patient reviews composed by a Dutch part (COPOD: Corpus of Patient Opinions in Dutch) and a Spanish part (COPOS: Corpus of Patient Opinions in Spanish). Experiments have been carried out using a supervised method (SVM), a cross-domain method (OpeNER) and a dictionary lookup method for both languages. Obtained results overcome the baseline in almost all the cases and are higher than other polarity classifiers in patient domain. Regarding the bilingualism, the developed systems for Dutch and Spanish have a similar performance for F1-measure and Accuracy.El Análisis de Sentimientos es una tarea del Procesamiento del Lenguaje Natural que ha sido estudiada en diferentes dominios como el de películas, teléfonos móviles u hoteles. Sin embargo, otras áreas como el dominio médico no han sido exploradas todavía. En este trabajo presentamos un corpus de opiniones de pacientes formado por una parte en holandés (COPOD: Corpus of Patient Opinions in Dutch) y por otra parte en español (COPOS: Corpus of Patient Opinions in Spanish). Además, se han realizado diferentes experimentos en ambas lenguas utilizando un método supervisado (SVM), una aproximación basada en cross-domain y un método basado en diccionario. Los resultados obtenidos superan el método base en casi todos los casos e incluso los resultados de otros clasificadores de polaridad en el dominio del paciente. Con respecto al bilingüismo, los sistemas desarrollados para holandés y español proporcionan resultados similares para las medidas F1 y Accuracy.This work has been partially supported by a grant from the Ministerio de Educación Cultura y Deporte (MECD – scholarship FPU014/00983), Fondo Europeo de Desarrollo Regional (FEDER) and REDES project (TIN2015-65136-C2-1-R) from the Spanish Government

Fibrosis retroperitoneal idiopática

Se presenta un caso de fibrosis retroperitoneal idiopática, proceso que se caracteriza clínicamente por la presentación de un cuadro de obstrucción ureteral de etiología desconocida. Se discuten los factores etiopatogénicos involucrados hasta ahora. La ultrasonografía y la tomografía computadorizada se muestran en la actualidad como los dos medios de mayor utilidad en el diagnóstico de este proceso, cuyo tratamiento combina la terapéutica médica esteroidea y la quirúrgica mediante, fundamentalmente, ureterólisis.A case of idiopathic retroperitoneal fibrosis is presented. From a clinical perspective, this entity features ureteral obstruction of unknown etiology. The current etiopathogenic factors involved are discussed. Ultrasonography and computed tomography are two of the most useful diagnostic tools in this process. Therapy includes steroid administration and surgical ureterolysis.Die Verf. Stellen einen Fall einer idiopathischen retroperitonealen Fibrose vor, ein Prozess, der in klinischer Hinsicht durch das Vorhandensein eines ureteralen Obstruktionsbildes unbekannter Âtiologie gekennzeichnet wird. Sie erõrtern die bisher beobachteten ätiopathogenischen Faktoren. Die Ultrasonographie und die komputerisierte Tomographie sind gegenwürtig zwei Mittel, die sich als besonders nützlich für die Diagnose dieses Prozess erwiesen haben,dessen Behandlung die steroide ärztliche Therapeutik und die Chirurgische kombiniert, die in erster Linie mittels Ureterolyse erfolgt.Nous présentons un cas de fibrose rétropéritonéale idiopahique, processus cliniquement carnetérisé par la présentation d'un cadre d'obstruction de l'urétre dont l'étiologie est méconnue. l'ultrasonographie et la tomograpnie computariséc sont actuellement les deux moyens les plus utiles dans le diagnostic de ce processus, dont le traitement associe la thérapeutique médicale stéroïde et la chirurgie et ce fondamentalement par l´urétêrolyse

Retropritoneal ganglioneuroblatoma. Current concept of a rare case

El estudio, diagnóstico y tratamiento de un caso de ganglioneuroblastoma retroperitoneal, en un varón de 14 años, ha sido, por su presentación inhabitual a esta edad, el motivo del estudio en sí del caso y de actualización en cuanto a metodología diagnóstica, posibilidades terapéuticas, factores pronósticos y actualidad etiológica de estos procesos, que son analizados críticamente.The study, diagnosis and treatment Of a case Of retroperitoneal ganglioneuroblastoma in a 14-year-old boy has been the reason OT the report of the case because of its particular rareness or presentation at such age as well as diagnostic methodology, therapeutic possibilities, current etiology up-dating of such condition, which are critically analyzed