Bayesian Inference of Recursive Sequences of Group Activities from Tracks

We present a probabilistic generative model for inferring a description of coordinated, recursively structured group activities at multiple levels of temporal granularity based on observations of individuals' trajectories. The model accommodates: (1) hierarchically structured groups, (2) activities that are temporally and compositionally recursive, (3) component roles assigning different subactivity dynamics to subgroups of participants, and (4) a nonparametric Gaussian Process model of trajectories. We present an MCMC sampling framework for performing joint inference over recursive activity descriptions and assignment of trajectories to groups, integrating out continuous parameters. We demonstrate the model's expressive power in several simulated and complex real-world scenarios from the VIRAT and UCLA Aerial Event video data sets.Comment: 10 pages, 6 figures, in Proceedings of the 30th AAAI Conference on Artificial Intelligence (AAAI'16), Phoenix, AZ, 201

75 años como referente de la investigación agraria y medioambiental española en condiciones de clima mediterráneo [Sitio Web]

1 .pdf con imagen de acceso al “website”, su url y los créditos relacionados con su creación y diseño.-- Créditos: Organización, Estación Experimental de Aula Dei (EEAD-CSIC); Dirección, Jesús Val Falcón; Coordinación, Ana Álvarez-Fernandez, Jorge Álvaro-Fuentes, Ernesto Igartua; Contenido, Anunciación Abadía, Javier Abadía, Carlos Albiñana, Miguel Alfonso, Arancha Arbeloa, Raúl Arbués, Isabel Armillas, Manuel Becana, Santiago Beguería, Carmen Castañeda, Ana Castillo, José Cavero, Bruno Contreras, Azahara Díaz, Edgar García, Elena García, Juan Manuel Gascuñana, Leticia Gaspar, Yolanda Gogorcena, Juan Herrero, Victoria Lafuente, María Victoria López, Juan Antonio Marín, José Martínez, José Carlos Martínez-Giménez, Ana Pilar Mata, Manuel Matamoros, Pierre Mignard, María Ángeles Moreno, Paula Murillo, Ana Navas, Antonio Pérez, Rafael Picorel, María Pilar Vallés, Irene Villar, Inmaculada Yruela, Nery Zapata, Isabel Zarazaga; Diseño y programación: DigitalWorks (Juanjo Ascaso y Asun Dieste); Vídeo, Delegación del CSIC en Aragón (Sara Gutiérrez y Yolanda Hernáiz); Fotografía, Archivo EEAD-CSIC, Anunciación Abadía, Jorge Álvaro-Fuentes, Arancha Arbeloa, Juanjo Ascaso, Santiago Beguería, Elena García, Ernesto Igartua, Ignasi Iglesias, José Manuel Lasa, José Carlos Martínez-Giménez, Pierre Mignard, María Ángeles Moreno, Rubén Sancho, Kosana Suvocarev, María Pilar Vallés, Nery Zapata."Sitio web" de nueva creación y conmemorativo del 75 Aniversario de la EEAD-CSIC que contiene: 1) Foto esférica de su personal en activo; 2) Recopilación de sus hitos históricos más destacados, en orden cronológico; 3) Un vídeo con participación de su personal y muestra de algunas de sus instalaciones; 4) Un mapa con la distribución geográfica de los egresado del Instituto; 5) Algunas fotos, destacando las tomadas a su personal en las celebraciones del 25 y 50 Aniversarios de la EEAD-CSIC.Presentado durante la "Jornada. 75 Aniversario EEAD-CSIC (Zaragoza, Patio de la Infanta. 30 octubre 2019)".Financiación: CSIC, Vicepresidencia Adjunta de Organización y Cultura Científica.N

Bayesian Data Association for Temporal Scene Understanding

Understanding the content of a video sequence is not a particularly difficult problem for humans. We can easily identify objects, such as people, and track their position and pose within the 3D world. A computer system that could understand the world through videos would be extremely beneficial in applications such as surveillance, robotics, biology. Despite significant advances in areas like tracking and, more recently, 3D static scene understanding, such a vision system does not yet exist. In this work, I present progress on this problem, restricted to videos of objects that move in smoothly and which are relatively easily detected, such as people. Our goal is to identify all the moving objects in the scene and track their physical state (e.g., their 3D position or pose) in the world throughout the video. We develop a Bayesian generative model of a temporal scene, where we separately model data association, the 3D scene and imaging system, and the likelihood function. Under this model, the video data is the result of capturing the scene with the imaging system, and noisily detecting video features. This formulation is very general, and can be used to model a wide variety of scenarios, including videos of people walking, and time-lapse images of pollen tubes growing in vitro. Importantly, we model the scene in world coordinates and units, as opposed to pixels, allowing us to reason about the world in a natural way, e.g., explaining occlusion and perspective distortion. We use Gaussian processes to model motion, and propose that it is a general and effective way to characterize smooth, but otherwise arbitrary, trajectories. We perform inference using MCMC sampling, where we fit our model of the temporal scene to data extracted from the videos. We address the problem of variable dimensionality by estimating data association and integrating out all scene variables. Our experiments show our approach is competitive, producing results which are comparable to state-of-the-art methods

Bayesian Inference of Recursive Sequences of Group Activities from Tracks

We present a probabilistic generative model for inferring a description of coordinated, recursively structured group activities at multiple levels of temporal granularity based on observations of individuals’ trajectories. The model accommodates: (1) hierarchically structured groups, (2) activities that are temporally and compositionally recursive, (3) component roles assigning different subactivity dynamics to subgroups of participants, and (4) a nonparametric Gaussian Process model of trajectories. We present an MCMC sampling framework for performing joint inference over recursive activity descriptions and assignment of trajectories to groups, integrating out continuous parameters. We demonstrate the model’s expressive power in several simulated and complex real-world scenarios from the VIRAT and UCLA Aerial Event video data sets

A generative statistical model for tracking multiple smooth trajectories

We present a general model for tracking smooth trajec-tories of multiple targets in complex data sets, where tracks potentially cross each other many times. As the number of overlapping trajectories grows, exploiting smoothness be-comes increasingly important to disambiguate the associa-tion of successive points. However, in many important prob-lems an effective parametric model for the trajectories does not exist. Hence we propose modeling trajectories as in-dependent realizations of Gaussian processes with kernel functions which allow for arbitrary smooth motion. Our generative statistical model accounts for the data as com-ing from an unknown number of such processes, together with expectations for noise points and the probability that points are missing. For inference we compare two methods: A modified ver-sion of the Markov chain Monte Carlo data association (MCMCDA) method, and a Gibbs sampling method which is much simpler and faster, and gives better results by be-ing able to search the solution space more efficiently. In both cases, we compare our results against the smoothing provided by linear dynamical systems (LDS). We test our approach on videos of birds and fish, and on 82 image sequences of pollen tubes growing in a petri dish, each with up to 60 tubes with multiple crossings. We achieve 93 % accuracy on image sequences with up to ten trajectories (35 sequences) and 88 % accuracy when there are more than ten (42 sequences). This performance sur-passes that of using an LDS motion model, and far exceeds a simple heuristic tracker. 1

Genetic diversity of barley cultivars grown in Spain, estimated by RFLP, similarity and coancestry coefficients

This study was conducted with the objective of characterizing the genetic variation among a representative set of 37 barley cultivars currently grown in Spain, using restriction fragment length polymorphism (RFLP) markers. Thirty-two RFLP probes, in combination with three restriction enzymes, were used to analyse polymorphism at the molecular level. Genetic distances (GD), based on RFLP band patterns, and coancestry coefficients (f), based on pedigree records, were calculated. Of the 95 clone-enzyme combinations analysed, 71 (74.7%) were polymorphic, representing 246 RFLP patterns. A cluster analysis of GD split the sample into five distinct germplasm groups that were consistent with the history of the cultivars (winter European, spring European, CIMMYT-ICARDA materials, the single cultivar 'Dobla' and Spanish local materials). The Spanish group was the most distinct one and had unique alleles at markers close to major loci determining phenological adaptation. The probes which best distinguished among groups were also identified. Genetic similarity estimates were moderately consistent with f (for cultivars with complete pedigrees). The implications for integration of diversity studies into breeding programmes are discussed.Peer Reviewe

Tratamiento de quiste óseo traumático mandibular de grandes dimensiones. Revisión de la literatura y reporte de un caso / Treatment of a Large Mandibular Traumatic Bone Cyst: Literature Review and Case Report

Antecedentes: El quiste óseo traumático o simple se presenta en el área maxilofacial demanera más frecuente en la región posterior mandibular; su dimensión es usualmente de1-3 cm de diámetro y se trata convencionalmente con curetaje óseo. Objetivo: Se realizauna revisión de la literatura y se presenta el caso de un quiste óseo mandibular de grandesdimensiones para el que se propone una alternativa terapéutica a la que se utiliza actualmentepara los seudoquistes de grandes dimensiones. Resultados: El caso correspondea una paciente de diecinueve años de edad con un diagnóstico de quiste óseo simplemandibular de gran dimensión (10 cm de diámetro mayor), quien fue tratada en el HospitalRegional Vicente Corral Moscoso, del Ministerio de Salud de Ecuador. La terapia consistióen curetaje intracavitario e injerto autólogo de cresta iliaca, el cual mostró adecuadosresultados rápidos y adecuados en la reconstrucción de la mandíbula. Background: The traumatic or simple bone cyst is frequently found in the maxillofacial areamostly in the posterior body of the mandible; its average diameter is 1-3 cm and the usualtreatment is bone curettage. Objective: A review of literature and a case of a large mandibulartraumatic bone cyst are presented. An alternative therapy to treat large pseudocystsis proposed. Results: A 19-year-old female patient with diagnosis of a large simple bonecyst (diameter: 10 cm) was treated at the Regional “Vicente Corral Moscoso” Hospital thatis affiliated to the Ministry of Health of Ecuador. The treatment consisted of intracavitarycurettage and autologous iliac crest bone graft, achieving a fast and adequate bone mandiblereconstruction

Treatment of a Large Mandibular Traumatic Bone Cyst: Literature Review and Case Report

Antecedentes: El quiste óseo traumático o simple se presenta en el área maxilofacial de manera más frecuente en la región posterior mandibular; su dimensión es usualmente de 1-3 cm de diámetro y se trata convencionalmente con curetaje óseo. Método: Se realiza una revisión de la literatura y se presenta el caso de un quiste óseo mandibular de grandes dimensiones para el que se propone una alternativa terapéutica a la que se utiliza actualmente para los seudoquistes de grandes dimensiones. Resultados: El caso corresponde a una paciente de diecinueve años de edad con un diagnóstico de quiste óseo simple mandibular de gran dimensión (10 cm de diámetro mayor), quien fue tratada en el Hospital Regional Vicente Corral Moscoso, del Ministerio de Salud de Ecuador. La terapia consistió en curetaje intracavitario e injerto autólogo de cresta iliaca, el cual mostró adecuados resultados rápidos y adecuados en la reconstrucción de la mandíbula.Background: The traumatic or simple bone cyst is frequently found in the maxillofacial area mostly in the posterior body of the mandible; its average diameter is 1-3 cm and the usual treatment is bone curettage. Method: A review of literature and a case of a large mandibular traumatic bone cyst are presented. An alternative therapy to treat large pseudocysts is proposed. Results: A 19-year-old female patient with diagnosis of a large simple bone cyst (diameter: 10 cm) was treated at the Regional “Vicente Corral Moscoso” Hospital that is affiliated to the Ministry of Health of Ecuador. The treatment consisted of intracavitary curettage and autologous iliac crest bone graft, achieving a fast and adequate bone mandible reconstruction

Tratamiento de quiste óseo traumático mandibular de grandes dimensiones. Revisión de la literatura y reporte de un caso

Background: The traumatic or simple bone cyst is frequently found in the maxillofacial areamostly in the posterior body of the mandible; its average diameter is 1-3 cm and the usualtreatment is bone curettage. Objective: A review of literature and a case of a large mandibulartraumatic bone cyst are presented. An alternative therapy to treat large pseudocystsis proposed. Results: A 19-year-old female patient with diagnosis of a large simple bonecyst (diameter: 10 cm) was treated at the Regional “Vicente Corral Moscoso” Hospital thatis affiliated to the Ministry of Health of Ecuador. The treatment consisted of intracavitarycurettage and autologous iliac crest bone graft, achieving a fast and adequate bone mandiblereconstruction.Antecedentes: El quiste óseo traumático o simple se presenta en el área maxilofacial demanera más frecuente en la región posterior mandibular; su dimensión es usualmente de1-3 cm de diámetro y se trata convencionalmente con curetaje óseo. Objetivo: Se realizauna revisión de la literatura y se presenta el caso de un quiste óseo mandibular de grandesdimensiones para el que se propone una alternativa terapéutica a la que se utiliza actualmentepara los seudoquistes de grandes dimensiones. Resultados: El caso correspondea una paciente de diecinueve años de edad con un diagnóstico de quiste óseo simplemandibular de gran dimensión (10 cm de diámetro mayor), quien fue tratada en el HospitalRegional Vicente Corral Moscoso, del Ministerio de Salud de Ecuador. La terapia consistióen curetaje intracavitario e injerto autólogo de cresta iliaca, el cual mostró adecuadosresultados rápidos y adecuados en la reconstrucción de la mandíbula.