Área de Sistemas de la Información y las Comunicaciones
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- PublicationQuantitative approach to assist neuroblastoma assessment by measuring I-123 mIBG uptake in scintigraphic images(International Society for Stereology & Image Analysis, 2015) Martínez Díaz, Rafael; Balaguer Guill, Julia; Sánchez Ruiz, Luis Manuel; Bello Arques, Pilar; Castel, Victoria; Rivas Sanchez, Antonio; Cañete Nieto, Adela; Falgás Lacueva, Marina; Loaiza Gongora, Jose Luis; Peris Fajarnes, Guillermo; Dpto. de Matemática Aplicada; Dpto. de Ingeniería Gráfica; Escuela Técnica Superior de Ingeniería del Diseño; Escuela Técnica Superior de Ingeniería Geodésica, Cartográfica y Topográfica; Área de Sistemas de la Información y las Comunicaciones; Centro de Investigación en Tecnologías Gráficas; Hospital Universitari i Politècnic La Fe; Universitat Politècnica de ValènciaWhole-body 123I-Metaiodobenzylguanidine (mIBG) scintigraphy is used as the primary image modality in neuroblastoma detection. It is the most sensitive and specific method for staging and response evaluation. Validated semi-quantitative scoring methods with low interobserver variability and high reproducibility have shown to be indispensable for the evaluation of response to therapy. However, low resolution, noise and acquisition difficulties, specially in children, make low definition scans. These facts increase observer dependent interpretations that limit assessment and complicate to put a scoring method succesfully into practice. It is essential to have an objective and reliable measure of response to test the activity of therapies. In this paper we propose the use of a quantitative observer-independent measurement of the strength of uptake to be used as an additional tool for assisting the International Society of Paediatric Oncology Europe Neuroblastoma Group (SIOPEN) semi-quantitative scoring method. This is the scoring method recommended by the SIOPEN Nuclear Medicine and Physics Committee, in collaborative work with the Children’s Oncology Group, as the standard one for acquiring and reporting diagnostic paediatric mIBG scans across Europe. Our proposed method is based on the ratio between the amount of specific uptake at tumours and the amount of non-specific uptake at SIOPEN anatomical sectors which has shown to be constant in all the scans of the patients.
- PublicationObjective Evaluation of the Width of Source Ensemble in Virtual Halls(American Society of Mechanical Engineers (ASME), 2012-08) Cerdá Jordá, Salvador; Giménez Pérez, Maria Alicia; Cibrián Ortíz de Anda, Rosa; Segura Garcia, Jaume; Montell Serrano, Radha Empar; Barba Sevillano, Arturo; Dpto. de Física Aplicada; Dpto. de Matemática Aplicada; Área de Sistemas de la Información y las Comunicaciones; Escuela Técnica Superior de Ingeniería Industrial; Escuela Técnica Superior de Ingeniería Informática; Ministerio de Ciencia e Innovación; Ministerio de Ciencia y Tecnología[EN] In this work, we study the effects of the width of the sound source in several acoustical virtual room models with different topologies, sizes and uses, calibrated with commercial software. To achieve this aim, a square distribution of sound sources with variable side length has been considered. We have auralized four channels of speech signal and musical signal in three different locations in each room. By using signal processing techniques, a comparison of multisource auralizations with the ones obtained from a single source in the middle of the stage is made. Also, the variations between the usual room parameters obtained from these simulations are analyzed, in order to show the effect of the hall in the objective evaluation according to the source width.
- PublicationModelling with uncertainty the ideological evolution of a society with extreme groups(Universitat Politècnica de València, 2014-03-03T07:22:59Z) Tarazona Tornero, Ana Celia; Santonja Gómez, Francisco José; Villanueva Oller, Francisco Javier; Villanueva Micó, Rafael Jacinto; Facultad de Administración y Dirección de Empresas; Dpto. de Matemática Aplicada; Instituto Universitario de Matemática Multidisciplinar; Área de Sistemas de la Información y las ComunicacionesThe Basque Country is a northern Spanish region (Autonomous Community) where, from 1960¿s, there is a organization called ETA that wants to achieve its political goals by violent means. The Basque population is divided, mainly, into the ones who support or reject the ETA¿s political goals and its violent means. Also, the pressure of ETA and its supporters on the Basque population are present in the daily life. Taking into account the Basque scenario, in this PhD dissertation, we are interested in how the di¿erent groups of people defined by their attitude towards ETA evolve over the time, with two main aims: ¿ find out which the most relevant events that make changes in the attitude evolution are, ¿ taking into account the relation between ETA¿s supporters and ETA¿s member source, predict the attitude evolution in the next future in order to see if the supporters group wanes and, as a consequence, ETA also does. To do that, on one hand, we use elections and Euskobarometro data (Euskobaromero is a sociological statistical survey in the Basque Country), and then, we build the mathematical models assuming the hypothesis that the change of attitude, ideology or opinion may be socially transmitted. Therefore, classical techniques in epidemiology are used to build and study these models. On the other hand, we should not forget that we want to study a problem in Social Sciences, where data, coming from surveys, contain errors. Therefore, during the development of this dissertation it is necessary to use techniques to deal with uncertainty in the presented models. In fact, we use some, trying to avoid in each new technique the disadvantages that appear in the previous one. The structure of this PhD dissertation is as follows. In Chapter 1 we introduce the problem to be studied and make a historical overview of the PhD thesis. In Chapter 2 we summarise the main facts in the history of ETA that we consider relevant to the proper development of the present dissertation. A firstmodel is presented in Chapter 3. Here, we divide the population of the Basque Country depending on the political party they vote and classify the political parties respect to their opinion on the idea of ¿independence from Spain¿, one of the main goals of ETA. Thus, with data of general elections, we build a type-epidemiological model and use the Latin Hypercube Sampling technique to predict with uncertainty over the next election dates, the dynamics of the population respect to the idea of ¿independence from Spain¿. In the Chapter 4, Euskobarometro data about the ¿population attitude towards ETA¿ are used to build a model to find out if the ¿Law of Political Parties¿ (LPP) passed in Jun 2002 had e¿ect on the attitude towards ETA of the Basque Population. We use a bootstrapping technique to know if the di¿erences between the model prediction and Euskobarometro data after LPP are significative and quantify these di¿erences. In this case, bootstrapping is the technique that allows us to deal with the model uncertainty. In the Chapter 5, using the same model as in the Chapter 4 and Euskobarometro data about the population attitude towards ETA since May 2005, we predict with uncertainty the evolution dynamics of the groups providing a model confidence band prediction over the next few years. To do that we introduce a new computational technique to deal with the model uncertainty.
- PublicationPsychoacoustic parameters as a tool for subjective assessment in catering premises(Science and Engineering Publishing Company, USA, 2013) Segura Garcia, Jaume; Cerdá Jordá, Salvador; Montell Serrano, Radha Empar; Romero Faus, José; Cibrián Ortíz de Anda, Rosa; Giménez Pérez, Maria Alicia; Dpto. de Física Aplicada; Dpto. de Matemática Aplicada; Área de Sistemas de la Información y las Comunicaciones; Escuela Técnica Superior de Ingeniería Industrial; Escuela Técnica Superior de Ingeniería Informática; Ministerio de Ciencia e Innovación; Universitat de València[EN] Psycho-acoustic perception of an environment is an important factor in the assessment and subjective description of the soundscape. It determines the environmental impact on each of the individuals. The parameters associated with these models allow us to determine ratings of nuisance in each environment in order to make comparisons. In this paper, a description of various parameters of sound quality (loudness, sharpness, roughness, fluctuation strength and tonality) is made to assess the nuisance / pleasure models by Zwicker. A comparison with different kinds of restaurants is also made. The models involved are influenced by the acoustics of the premises.
- PublicationAnálisis, propuesta y desarrollo de técnicas de medición objetiva en imágenes 123/-mIBG, para pacientes con neuroblastoma(Universitat Politècnica de València, 2015-12-18) Martínez Díaz, Rafael; Peris Fajarnes, Guillermo; Sánchez Ruiz, Luis Manuel; Dpto. de Matemática Aplicada; Dpto. de Ingeniería Gráfica; Escuela Técnica Superior de Ingeniería del Diseño; Escuela Técnica Superior de Ingeniería Geodésica, Cartográfica y Topográfica; Área de Sistemas de la Información y las Comunicaciones; Centro de Investigación en Tecnologías Gráficas[EN] In neuroblastoma management various medical imaging modalities are involved. Among them, scans of 123I-mBG continue being today the most specific and sensitive, so they have an important role in assessing the stage of the disease and the patient's response to treatment. Although guidelines that attempt to homogenize the process of patient preparation and image acquisition are followed when performing the scan, there are intrinsic and hardly avoidable problems to this type of medical imaging that degrade its quality. Images acquired, especially in young children, show poor defined contours, low contrast and intensity variations between scans, making it difficult to identify the areas of uptake of 123I-mIBG. In the recent years, various semi quantitative scoring methods of 123ImIBG scans have emerged in order to quantify the effectiveness of treatment response and to standardize the assessment of the studies. These methods have proven to be able to assess patient prognosis, so that they have become essential when assessing the disease. But when applying any scoring method, and because the poor definition of the image, the valuation may still be too subjective and dependent on the observer, making difficult the comparison of results between different medical institutions. It is therefore an automated tool required to assist the diagnosis which minimizes subjectivity in the application of these scoring methods and improves the objective evaluation of the response to treatment and the prognosis of the patient. In this work we propose a methodology to take objective and easily comparable measurements on 123I-mIBG scans, along with an image processing algorithm to automatically detect 123I-mIBG uptake areas which are sufficiently anomalous to be suspected of being pathological.
- PublicationA probabilistic estimation and prediction technique for dynamic continuous social science models: The evolution of the attitude of the Basque Country population towards ETA as a case study(Elsevier, 2015-08-01) Cortés López, Juan Carlos; Santonja, F.; Tarazona Tornero, Ana Celia; Villanueva Micó, Rafael Jacinto; Villanueva Oller, Francisco Javier; Facultad de Administración y Dirección de Empresas; Dpto. de Matemática Aplicada; Instituto Universitario de Matemática Multidisciplinar; Área de Sistemas de la Información y las Comunicaciones; Ministerio de Economía y CompetitividadIn this paper, a computational technique to deal with uncertainty in dynamic continuous models in Social Sciences is presented.Considering data from surveys,the method consists of determining the probability distribution of the survey output and this allows to sample data and fit the model to the sampled data using a goodness-of-fit criterion based the χ2-test. Taking the fitted parameters that were not rejected by the χ2-test, substituting them into the model and computing their outputs, 95% confidence intervals in each time instant capturing the uncertainty of the survey data (probabilistic estimation) is built. Using the same set of obtained model parameters, a prediction over the next few years with 95% confidence intervals (probabilistic prediction) is also provided. This technique is applied to a dynamic social model describing the evolution of the attitude of the Basque Country population towards the revolutionary organization ETA.
- PublicationEncontrando evidencias de la evaluación por competencias en el Grado de Ingeniería Informática(Editorial Universitat Politècnica de València, 2014-07) Poza Luján, José Luis; Terrasa Barrena, Silvia Mª; Conejero Casares, José Alberto; Molina Marco, Antonio; Prieto Saez, Natividad; Vendrell Vidal, Eduardo; Pérez Laserna, Julia; Dpto. de Informática de Sistemas y Computadores; Dpto. de Ingeniería de Sistemas y Automática; Dpto. de Sistemas Informáticos y Computación; Dpto. de Matemática Aplicada; Instituto Universitario de Automática e Informática Industrial; Instituto Universitario de Matemática Pura y Aplicada; Área de Sistemas de la Información y las Comunicaciones; Escuela Técnica Superior de Ingeniería Informática; Instituto Universitario Valenciano de Investigación en Inteligencia Artificial[ES] Actualmente el diseño de los grados universitarios se basa en enunciar una serie de competencias que los estudiantes deben adquirir una vez finalizados sus estudios. Debido a la poca experiencia que se tiene a este respecto, diseñar e implantar un plan de estudios basado en competencias es una tarea compleja. Por una parte, los estudiantes cursan las asignaturas que se les proponen y son evaluados para cuantificar el grado de adquisición de las competencias asociadas. Por otra parte, las titulaciones deben ser certificadas para garantizar que cumplen sus objetivos, entre los cuales se encuentra el que sus estudiantes obtengan las destrezas esperadas. Para ello resulta imprescindible encontrar las evidencias de la evaluación por competencias a partir de las asignaturas del grado. En este artículo se presenta la aplicación EVALÚA que permite recopilar estas evidencias promoviendo la reformulación de las asignaturas en términos de resultados de aprendizaje que se relacionan con las competencias y los sistemas de evaluación utilizados.
- PublicationThe effect of the Spanish Law of Political Parties (LPP) on the attitude of the Basque Country population towards ETA: A dynamic modelling approach(Elsevier, 2013-04) Peco Yeste, Miguel; Santonja, Francisco-José; Tarazona Tornero, Ana Celia; Villanueva Micó, Rafael Jacinto; Villanueva Oller, Francisco Javier; Facultad de Administración y Dirección de Empresas; Dpto. de Matemática Aplicada; Instituto Universitario de Matemática Multidisciplinar; Área de Sistemas de la Información y las ComunicacionesIn June 2002, the Spanish Government passed the ¿Law of Political Parties¿ (LPP) with the aim, among others, of preventing parties giving political support to terrorist organizations. This law affected the Basque nationalist party ¿Batasuna¿, due to its proved relation with ETA. In this paper, taking data from the Euskobarometro (Basque Country survey) related to the attitude of the Basque population towards ETA, we propose a dynamic model for the pre-LPP scenario. This model will be extrapolated to the future in order to predict what would have happened to the attitude of the Basque population if the law had not been passed. These model predictions will be compared to post-LPP data from the Euskobarometro using a bootstrapping approach in order to quantify the effect of the LPP on the attitude of Basque Country population towards ETA.
- PublicationAcústica Virtual: una herramienta para la evaluación del patrimonio histórico-arquitectónico(Université du Québec à Trois-Rivières, 2013) Segura Garcia, Jaume; Montell Serrano, Radha Empar; Cerdá Jordá, Salvador; Barba Sevillano, Arturo; Cibrian Ortiz de Anda, Rosa M.; Planells Pérez, Ana; Querol Baquero, Luis; Cervera López, Oreto; Moya Latorre, Antonio; Giménez Pérez, Maria Alicia; Dpto. de Física Aplicada; Dpto. de Matemática Aplicada; Área de Sistemas de la Información y las Comunicaciones; Escuela Técnica Superior de Ingeniería Industrial; Escuela Técnica Superior de Ingeniería Informática; Ministerio de Ciencia e Innovación; Ministerio de Ciencia y Tecnología; Ministerio de Economía, Industria y Competitividad[ES] La acústica virtual ha demostrado ser una herramienta muy efectiva en el diseño acústico de recintos. Su aplicación al estudio de salas y edificios del patrimonio arquitectónico valenciano, ha permitido analizar la acústica de estos entornos y auralizar (cálculo de la respuesta del recinto a una determinada señal sonora), tanto señal musical como hablada (natural o generada sintéticamente). En este trabajo, describimos tanto el proceso de integración en el entorno virtual, con representación visual y sonora, como el de evaluación de la respuesta de estas salas a diferentes estímulos acústicos. Esta inmersión en el entorno virtual nos permite analizar subjetivamente la respuesta acústica del recinto, según la naturaleza de la señal trasmitida.
- PublicationMetodología para la mejora acústica de recintos de culto. Aplicación en la Catedral de Valencia(SOCIEDAD ESPAÑOLA DE ACUSTICA, 2021) Díaz-Rubio, Elena; Montell Serrano, Radha Empar; Cerdá Jordá, Salvador; Segura Garcia, Jaume; Cibrián Ortíz de Anda, Rosa; Barba Sevillano, Arturo; Lacatis, Radu George; Planells Pérez, Ana; FAYOS JORDAN, RAFAEL; NAVASQUILLO HERVÁS, JOAQUÍN; Giménez Pérez, Maria Alicia; Dpto. de Física Aplicada; Dpto. de Matemática Aplicada; Área de Sistemas de la Información y las Comunicaciones; Escuela Técnica Superior de Ingeniería Industrial; Escuela Técnica Superior de Ingeniería Informática; AGENCIA ESTATAL DE INVESTIGACION; MINISTERIO DE ECONOMIA Y EMPRESA[ES] Los recintos de culto son espacios patrimoniales de gran valor cultural, artístico y arquitectónico. Asimismo, en ellos tienen lugar eventos, integrantes de su patrimonio cultural inmaterial, donde la transmisión del sonido es un factor preferente. Por todo ello, resulta relevante garantizar un adecuado acondicionamiento acústico de los recintos de culto para sus dos usos fundamentales, la música religiosa y la palabra. Para ello, se ha establecido una metodología compuesta por las fases de medición acústica, estudio del comportamiento acústico del recinto, levantamiento y calibración del modelo acústico y simulaciones acústicas. Al tratarse de edificios protegidos, las propuestas de intervención deben basarse en el respeto a los valores patrimoniales de los templos. Con todo ello, en este estudio se ha realizado una propuesta de mejora del acondicionamiento acústico de la Catedral de Valencia.