Search results for " Computer science"
showing 10 items of 3983 documents
Network Capacity Estimators Predicting QoE in HTTP Adaptive Streaming
2022
The aim of adaptive HTTP streaming technology is preserving the best possible video streaming quality for viewers in heterogeneous network conditions. This can be achieved by making multiple quality versions of the video available. Switching between versions during playback should be imperceptible and fluent. The decision about quality-level switching is typically based on network capacity estimation and buffer occupancy, which predict the risk of stalling. Since quality-level switching and stalling are directly evident to the user, they are often classified as influence factors of quality of experience (QoE). In this paper, we observe different network capacity estimators and buffer behavi…
Cluny: de la gestion de données à la réalité augmentée
2007
Cluny III was the greatest abbey of the Christendom until the construction of Saint-Peters of Roma in the 17th century. Unfortunately, the Order of Cluny was broke up with the French revolution, and the church became a stone pit carry. Until 2010, for the commemoration of the Cluny foundation, a great restoration yard has begun. It is composed of two parts: Hézelon which is the restoration and development program for the patrimony of Cluny; and Gunzo, which is a research assembly on new image technologies, for knowledge and valorisation of the site. To facilitate the comprehension of this patrimony, and to allow the public to access its past, augmented reality features had been developed.
Utilisation et traitement des données saisies sous EndNote avec des scripts PHP/MySQL
2010
National audience; Cet article présente la façon d’exploiter ou de traiter des données de références bibliographiques saisies ou importées dans EndNote en dehors de leur logiciel natif en utilisant des scripts PHP/MySQL. Deux raisons nous ont amenés à utiliser ce traitement : soit EndNote ne pouvait pas faire des opérations particulières, soit il le pouvait mais de façon trop fastidieuse. Dans ce but nous exposerons dans un premier temps la façon dont les données sont organisées par EndNote, puis la méthode pour les exploiter et enfin nous donnerons quelques exemples d’utilisation.
« Une base de données de traductions en périodiques : la ‘Décabase’ » (avec Caroline Crépiat, Université de Lille), Colloque international, « What’s …
2022
Présentation de la "Décabase", base de données de traductions des poètes et auteurs britanniques décadents dans les périodiques français entre 1885 et 1914.Ce projet a été réalisé par Caroline Crépiat, post-doctorante à l’Université de Bourgogne (2019-2020), Arnaud Millereux, ASI à la MSH de Dijon, Dorian Morel, stagiaire informatique et Bénédicte Coste, Professeur de littérature et de culture victoriennes, Université de Bourgogne. Cette base trouve sa source d’inspiration dans la base « Intraduction. Traduire en français, 18e-19e siècle constituée par Blaise Wilfert-Portal et Claire Guérin qui ont dépouillé les volumes 1 à 27 du Catalogue général de la librairie française, entre 1840 et 19…
SHREC'12 Track: 3D mesh segmentation
2012
International audience; 3D mesh segmentation is a fundamental process in many applications such as shape retrieval, compression, deformation, etc. The objective of this track is to evaluate the performance of recent segmentation methods using a ground-truth corpus and an accurate similarity metric. The ground-truth corpus is composed of 28 watertight models, grouped in five classes (animal, furniture, hand, human and bust) and each associated with 4 ground-truth segmentations done by human subjects. 3 research groups have participated to this track, the accuracy of their segmentation algorithms have been evaluated and compared with 4 other state-of-the-art methods.
Big Data Applications for Disaster Management
2017
International audience; The term "disaster management" comprises both natural and man-made disasters. Highly pervaded with various types of sensors, our environment generates large amounts of data. Thus, big data applications in the field of disaster management should adopt a modular view, going from a component to nation scale. Current research trends mainly aim at integrating component, building, neighborhood and city levels, neglecting the region level for managing disasters. Current research on big data mainly address smart buildings and smart grids, notably in the following areas: energy waste management, prediction and planning of power generation needs (based on smart meter readings,…
ORNAMENTAL SIGN LANGUAGE IN THE FIRST ORDER TRACERY BELTS
2010
18 pages; We consider ornamental sign language of first order where principles of sieve displacement, of asymmetric building blocks as base of ornament symmetry, color exchangeability and side equivalence principles work. The generic aspects of sieve and genesis of ornamental pattern and ornament sign in it are discussed. The hemiolia principle for ornamental genesis is introduced. The discoverer of most of these principles were artist Modris Tenisons [4, 5, 6, 7 (refs. 23, 24), 8 (ref. 65)]. Here we apply systematical research using simplest mathematical arguments. We come to conclusions that mathematical argument in arising ornament is of much more significance than simply symmetries in i…
Influence of lactose-citrate co-metabolism on the differences of growth and energetics in Leuconostoc lactis, Leuconostoc mesenteroides ssp. mesenter…
1999
International audience; The biodiversity of growth and energetics in Leuconostoc sp. has been studied in MRS lactose medium with and without citrate. On lactose alone, Ln. lactis has a growth rate double that of Ln. cremoris and Ln. mesenteroides. The pH is a more critical parameter for Ln. mesenteroides than for Ln. lactis or Ln. cremoris; without pH control Ln. mesenteroides is unable to acidify the medium under pH 4.5, while with pH control and as a consequence of a high Y(ATP) its growth is greater than Ln. lactis and Ln. cremoris. In general, lactose-citrate co-metabolism increases the growth rate, the biomass synthesis, the lactose utilisation ratio, and the production of lactate and …
Computer Aided Design for Diabetic Retinopathy
2013
International audience; Computer aided diagnosis and follow up can help in prevention and treatment of diabetes and its related complications. This paper presents a summary of the results we obtained over the last few years regarding the development of a CAD system for diabetic retinopathy. We present a methodology for diagnosis of DME based on exudates segmentation, as well as an automated detection of micro-aneurysm (MA) and DR diagnosis; Our approach uses standard available public database and shows a high power of generalization through cross database experiments.
Nonlinear Feedback Control and Stability Analysis of a Proof-of-Work Blockchain
2017
In this paper a novel feedback controller and stability analysis of a blockchain implementation is developed by using a control engineering perspective. The controller output equals the difficulty adjustment in the mining process while the feedback variable is the average block time over a certain time period. The computational power (hash rate) of the miners is considered a disturbance in the model. The developed controller is tested against a simulation model with constant disturbance, step and ramp responses as well as with a high-frequency sinusoidal disturbance. Stability and a fast response is demonstrated in all these cases with a controller which adjusts it's output at every new blo…