Spatio-temporal block model for video indexation assistance

International audienceIn the video indexing framework, we have developed a user assistance system in order to define concept models (i.e semantic index) according to features automatically extracted from the video. Because the manual indexing is a long and tedious task, we propose to focus the user attention on pre-selected prototypes that a priori correspond to the searched concepts. The proposed system is decomposed in three steps. In the first one, some basic spatio-temporal blocks are extracted from the video, a particular block being associated to a particular property of one feature. In the second step, a Question/Answer system allows the user to define links between basic blocks in order to define concept block models. And finally, some concept blocks are extracted and proposed as prototypes of the concepts. In this paper, we present the two first steps, particularly the block structure, illustrated by an example of video indexing that corresponds to the concept running in athletic videos

Points d'intérêt spatio-temporels pour la détection de mouvements dans les vidéos

National audienceParmi toutes les caractéristiques qui peuvent être extraites de vidéos, les points d'intérêt spatiotemporels (STIP) sont particulièrement intéressants car ce sont des caractéristiques de bas niveau simples et robustes qui permettent une bonne caractérisation des objets en mouvement. Dans cet article, nous définissons les STIP et analysons leurs propriétés. Puis, les STIP sont utilisés pour détecter des objets en mouvement et pour caractériser les changements spécifiques dans les mouvements de ces objets. Les performances sont étudiées sur des types très différents de vidéos : des séquences d'athlétisme et des séquences de films d'animation

Microliter-sized ionization device and method

A microliter-sized metastable ionization device with a cavity, a sample gas inlet, a corona gas inlet and a gas outlet. A first electrode has a hollow and disposed in the cavity and is in fluid communication with the sample gas inlet. A second electrode is in fluid communication with the corona gas inlet and is disposed around the first electrode adjacent the hollow end thereof. A gap forming means forms a corona gap between the first and second electrodes. A first power supply is connected to the first electrode and the second power supply is connected to the second electrode for generating a corona discharge across the corona gap. A collector has a hollow end portion disposed in the cavity which is in fluid communications with the gas outlet for the outgassing and detection of ionized gases. The first electrode can be a tubular member aligned concentrically with a cylindrical second electrode. The gap forming means can be in annular disc projecting radially inwardly from the cylindrical second electrode. The collector can have a tubular opening aligned coaxially with the first electrode and has an end face spaced a short distance from an end face of the first electrode forming a small active volume therebetween for the generation and detection of small quantities of trace analytes

Relevance of interest points for eye position prediction on videos

2009, XIV, 456 p., Softcover. ISBN: 978-3-642-04666-7International audienceThis papers tests the relevance of interest points to predict eye movements of subjects when viewing video sequences freely. Moreover the papers compares the eye positions of subjects with interest maps obtained using two classical interest point detectors: one spatial and one space-time. We fund that in function of the video sequence, and more especially in function of the motion inside the sequence, the spatial or the space-time interest point detector is more or less relevant to predict eye movements

A Cross-Sectional Study of People with Epilepsy and Neurocysticercosis in Tanzania: Clinical Characteristics and Diagnostic Approaches.

Neurocysticercosis (NCC) is a major cause of epilepsy in regions where pigs are free-ranging and hygiene is poor. Pork production is expected to increase in the next decade in sub-Saharan Africa, hence NCC will likely become more prevalent. In this study, people with epilepsy (PWE, n=212) were followed up 28.6 months after diagnosis of epilepsy. CT scans were performed, and serum and cerebrospinal fluid (CSF) of selected PWE were analysed. We compared the demographic data, clinical characteristics, and associated risk factors of PWE with and without NCC. PWE with NCC (n=35) were more likely to be older at first seizure (24.3 vs. 16.3 years, p=0.097), consumed more pork (97.1% vs. 73.6%, p=0.001), and were more often a member of the Iraqw tribe (94.3% vs. 67.8%, p=0.005) than PWE without NCC (n=177). PWE and NCC who were compliant with anti-epileptic medications had a significantly higher reduction of seizures (98.6% vs. 89.2%, p=0.046). Other characteristics such as gender, seizure frequency, compliance, past medical history, close contact with pigs, use of latrines and family history of seizures did not differ significantly between the two groups. The number of NCC lesions and active NCC lesions were significantly associated with a positive antibody result. The electroimmunotransfer blot, developed by the Centers for Disease Control and Prevention, was more sensitive than a commercial western blot, especially in PWE and cerebral calcifications. This is the first study to systematically compare the clinical characteristics of PWE due to NCC or other causes and to explore the utility of two different antibody tests for diagnosis of NCC in sub-Saharan Africa

Functional foods and health claims in the context of european legislation

functional foods and dietary supplements have undergone recent years austere rules at European level regarding health claims. Countries began to adopt these laws at national level, which will affect food producers. We will present the causes of issue of these regulations, their main characteristics, compliance with these conditions and how to obtain approvals for the use of new health claims

Mapping Polar Bear Maternal Denning Habitat in the National Petroleum Reserve–Alaska with an IfSAR Digital Terrain Model

The National Petroleum Reserve–Alaska (NPR-A) in northeastern Alaska provides winter maternal denning habitat for polar bears (Ursus maritimus) and also has high potential for recoverable hydrocarbons. Denning polar bears exposed to human activities may abandon their dens before their young are able to survive the severity of Arctic winter weather. To ensure that wintertime petroleum activities do not threaten polar bears, managers need to know the distribution of landscape features in which maternal dens are likely to occur. Here, we present a map of potential denning habitat within the NPR-A. We used a fine-grain digital elevation model derived from Interferometric Synthetic Aperture Radar (IfSAR) to generate a map of putative denning habitat. We then tested the map’s ability to identify polar bear denning habitat on the landscape. Our final map correctly identified 82% of denning habitat estimated to be within the NPR-A. Mapped denning habitat comprised 19.7 km2 (0.1% of the study area) and was widely dispersed. Though mapping denning habitat with IfSAR data was as effective as mapping with the photogrammetric methods used for other regions of the Alaskan Arctic coastal plain, the use of GIS to analyze IfSAR data allowed greater objectivity and flexibility with less manual labor. Analytical advantages and performance equivalent to that of manual cartographic methods suggest that the use of IfSAR data to identify polar bear maternal denning habitat is a better management tool in the NPR-A and wherever such data may be available.La réserve pétrolière nationale–Alaska (NPR-A), située dans le nord-est de l’Alaska (NPR-A), constitue un habitat hivernal de tanières de mise bas pour l’ours polaire (Ursus maritimus) et présente de grandes possibilités du point de vue des hydrocarbures récupérables. Les ours polaires des tanières qui sont exposés aux activités de l’être humain peuvent abandonner leur tanière avant que leurs petits ne soient prêts à survivre les rigueurs de l’hiver de l’Arctique. Afin de faire en sorte que les activités d’exploitation pétrolière hivernales ne posent pas de menaces aux ours polaires, les gestionnaires doivent connaître la répartition des caractéristiques du paysage où les tanières de mise bas sont susceptibles de se trouver. Ici, nous présentons une carte sur laquelle sont indiqués des habitats de tanières possibles au sein de la NPR-A. Nous avons utilisé un système de modélisation numérique des hauteurs à haute définition dérivé du radar interférométrique à synthèse d’ouverture (IfSAR) pour produire une carte putative de l’habitat de tanières. Ensuite, nous avons mis la carte à l’épreuve pour déterminer son aptitude à repérer l’habitat de tanières de mise bas au sein du paysage. Notre carte finale a repéré avec exactitude 82 % de l’habitat de tanières qui se trouverait à l’intérieur de la NPR-A. L’habitat de tanières cartographié s’étendait sur 19,7 km2 (0,1 % de l’aire étudiée) et était largement dispersé. Même si la cartographie de l’habitat de tanières au moyen des données de l’IfSAR était aussi efficace que la cartographie des méthodes photogrammétriques employées dans d’autres régions de la plaine côtière arctique de l’Alaska, l’utilisation du SIG pour analyser les données de l’IfSAR a donné lieu à une plus grande objectivité et flexibilité, avec moins de main-d’oeuvre. Les avantages analytiques et l’exécution équivalant à celles des méthodes de carto-graphie manuelles suggèrent que le recours aux données de l’IfSAR pour repérer l’habitat de tanières de mise bas d’ours polaires constitue un outil de gestion supérieur au sein de la NPR-A et de n’importe quel autre endroit où ces données sont disponibles

Efficient methods of individual study of students in the creative realization of textile design

It is difficult to imagine today the surrounding world, in its ordinary or original activities without clothes – without a significant covering that often comes to emphasize the importance of the best possible self-presentation in society and the world. At the same time, the artistic parallel that is constantly in step with the selfpresentation are considered the main components of which textiles play the central role in the clothing algorithm from the study process to the implementation of the most original and effective study methods but and practical application of some techniques that result in modern fashion faces, the importance of the leading place of textiles in the world as primordial in achieving a modern face and permanent maintenance in international fashion trends. The given article is about the status of independent work of students in the modern higher school as one of the forms of educational organization management. The main reasons for the insufficient efficiency of students' independent work in the theory and practice of higher education were identified. The goals, structure and content of modern organizational models are substantiate; independent work; information and performance, the "inverted learning" model; the project-research model

Interference of modern clothing design and folk ornaments

Today, humanity is attracted to nature and its simplicity. The tendency to return to natural materials and simple shapes is felt. More and more often we return to traditions. The crafts, the traditions and the folklore are updated or they serve as a source of inspiration for current things