Generation of Folded Terrains from Simple Vector Maps

International audienceWhile several terrain generation methods focused on plausible watersheds, the fact that most mountains should not be isolated but rather be part of wider scale mountain ranges was seldom considered. In this work, we present the first procedural method that generates folded terrains from simple user input, in the form of some sparse peak distribution on a vector map. The key idea is to infer possible continental plates from this distribution and to use simplified plate tectonics to generate relevant terrain folds. The resulting terrain with large-scale folds, computed in real-time, can be further refined using standard erosion simulation. This leads to detailed terrains with plausible mountain ranges that match the peak distributions and main rivers specified on simple vector maps

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En avril 2016, une Semaine de la construction en terre crue fût organisée par la faculté Loci. Mêlant conférences, ateliers et séminaire, elle avait pour ambition de croiser les trois missions de la faculté - l’enseignement, la recherche et le service à la société – autour de la terre crue. Cet article en propose un bref compte-rendu

A multiphase Cahn-Hilliard system with mobilities and the numerical simulation of dewetting

We propose in this paper a new multiphase Cahn-Hilliard model with doubly degenerate mobilities. We prove by a formal asymptotic analysis that it approximates with second order accuracy the multiphase surface diffusion flow with mobility coefficients and surface tensions. To illustrate that it lends itself well to numerical approximation, we propose a simple and effective numerical scheme together with a very compact Matlab implementation. We provide the results of various numerical experiments to show the influence of mobility and surface tension coefficients. Thanks to its second order accuracy and its good suitability for numerical implementation, our model is very handy for tackling notably difficult surface diffusion problems. In particular, we show that it can be used very effectively to simulate numerically the dewetting of thin liquid tubes on arbitrary solid supports without requiring nonlinear boundary conditions.Comment: 35 page

QoS specification of ODP binding objects

We present a QoS oriented notation suitable for the ODP framework. In particular, we focus on a computational view of objects: we consider systems described as configurations of interacting objects and we deal with two types of communications: message passing and flows. In message passing, signals (from one object to another) are conveyed through the (implicit) underlying infrastructure. This form of interaction is suitable for client/server applications where no strong real time or ordering constraints are needed from the communication infrastructure. In contract, in a flow type of communication, signals are conveyed through third party (binding) objects that may be explicitly called for in order to ensure specific QoS requirements needed by specific applications. A building blocks approach for the formal specification of binding objects in the ODP computational model is presented. The formal notation that is used is based on LOTOS extended with two features - real time and gate passing. These features are among the extensions that are currently studied in the ISO standardisation Formal Description Techniques group. We apply our building blocks approach to the specification of a multicast, multimedia binding object

Profil de l’ionogramme sanguin chez les enfants brûlés du Centre Hospitalier Universitaire Pédiatrique Charles de Gaulle de Ouagadougou (Burkina Faso)

Les brûlures de l’enfant peuvent être à l’origine de troubles ioniques graves, entrainant une morbi-mortalité importante. Ce travail avait pour objectif de décrire les perturbations de l’ionogramme sanguin chez les enfants brûlés, afin de contribuer à l’amélioration des soins. Il s’est agi d’une étude transversale rétrospective allant du 01 janvier 2017 au 30 juin 2019. Ont été inclus les enfants hospitalisés dans le service de chirurgie du CHU pédiatrique Charles de Gaulle pour brûlure et chez lesquels un ionogramme sanguin a été réalisé. L’étude a porté sur 212 enfants, avec un âge moyen de 38,52 mois et un sex ratio de 1,12. La surface corporelle brûlée moyenne était de 26,60% et le délai moyen d’admission de 5,71 heures. La mortalité était de 16,98%. L’ionogramme sanguin à l’entrée a retrouvé une hyponatrémie (27,88%), une hypobicarbonatémie (53,95%), une hypoprotidémie (26,67%) et une hyperchlorémie (53,59%). Au contrôle, ces troubles ioniques étaient toujours présents. S’y sont associées une hypocalcémie (30,43%), une hypomagnésémie (27,27%) et une hyperphosphatémie (28,79%). La natrémie, la bicarbonatémie et la protidémie à l’entrée étaient significativement plus basses chez les patients décédés. Les brûlures de l’enfant sont fréquentes. Leur évolution est marquée par des perturbations de l’ionogramme sanguin et une mortalité élevée.Mots clés : Brûlure, Ionogramme sanguin, Enfants, Burkina Faso.   English title: Blood ionogram profile in burned children at the Charles de Gaulle University Pediatric Hospital of Ouagadougou (Burkina Faso)Burns in children can be the cause of serious ionic disorders, leading to significant morbidity and mortality. The aim of this study was to describe the disturbances in the blood ionogram of burnt children, in order to contribute to the improvement of care. This was a retrospective cross-sectional study from 01 January 2017 to 30 June 2019. Children hospitalised in the surgery department of the Charles de Gaulle Pediatric University Hospital for burns and in whom a blood ionogram was carried out were included. Our study involved 212 children, with an average age of 38.52 months and a sex ratio of 1.12. The average body surface area burned was 26.60% and the average admission time was 5.71 hours. Mortality was 16.98%. The blood ionogram at the entrance showed hyponatremia (27.88%), hypobicarbonatremia (53.95%), hypoprotidemia (26.67%) and hyperchloremia (53.59%). At the control, these ionic disorders were still present. They were associated with hypocalcaemia (30.43%), hypomagnesemia (27.27%) and hyperphosphatemia (28.79%). Natremia, bicarbonateemia and protidemia were significantly lower on admission in patients who died in the course of the evolution. Childhood burns are frequent at the CHUP-CDG; their evolution is marked by disturbances of the blood ionogram and high mortality.Keywords: Burns, Blood Ionogram, Children, Burkina Faso

Aneurysmal degeneration of vein graft 34 years after common carotid bypass for blunt trauma

peer reviewe

TREATMENT OF BLUNT AORTIC ISTHMUS RUPTURE: 19-YEARS SINGLE CENTER EXPERIENCE

peer reviewe

Necessary Skills and Knowledge for Staff Providing Telehealth Services

Background Although motor abnormalities have been flagged as potentially the most sensitive and specific clinical features for predicting the future progression to Parkinson's disease, little work has been done to characterize gait and balance impairments in idiopathic rapid eye movement sleep behavior disorder (iRBD). Objective The objective of this study was to quantitatively determine any static balance as well as gait impairments across the 5 independent domains of gait in polysomnography-confirmed iRBD patients using normal, fast-paced, and dual-task walking conditions. Methods A total of 38 participants (24 iRBD, 14 healthy controls) completed the following 5 different walking trials across a pressure sensor carpet: (1) normal pace, (2) fast pace, (3) while counting backward from 100 by 1s, (4) while naming as many animals as possible, (5) while subtracting 7s from 100. Results Although no gait differences were found between the groups during normal walking, there were significant differences between groups under the fast-paced and dual-task gait conditions. Specifically, in response to the dual tasking, healthy controls widened their step width without changing step width variability, whereas iRBD patients did not widen their step width but, rather, significantly increased their step width variability. Similarly, changes between the groups were observed during fast-paced walking wherein the iRBD patients demonstrated greater step length asymmetry when compared with controls. Conclusions This study demonstrates that iRBD patients have subtle gait impairments, which likely reflect early progressive degeneration in brainstem regions that regulate both REM sleep and gait coordination. Such gait assessments may be useful as a diagnostic preclinical screening tool for future fulminant gait abnormalities for trials of disease-preventive agents. (c) 2019 International Parkinson and Movement Disorder Societ