Heart rate sensors acceptability: data reliability vs. ease of use

International audienceIn the present study we focused on heart rate sensors and compared the acceptability and usability of the various devices candidates to feed the PRECIOUS (PREventive Care Infrastructure based On Ubiquitous Sensing) system. More precisely, smart-watch, chest-belt and 2-points-electrodes have been tested by users during 24 hours. Each device test lead to consult lifestyle reports about stress, sleep and physical activity. During this experimentation 11 participants completed different acceptability questionnaires. The first results interpretation revealed which sensor is the most acceptable and gave insight into how data reliability of the different devices influenced their respective acceptability in the daily life

Blind Sailors' Spatial Representation Using an On-Board Force Feedback Arm: Two Case Studies

International audienceUsing a vocal, auditory and haptic application designed for maritime navigation, blind sailors are able to set up and manage their voyages. However, investigation of the manner to present information remains a crucial issue to better understand spatial cognition and improve navigation without vision. In this study, we asked two participants to use SeaTouch on board and manage the ship headings during navigation in order to follow a predefined itinerary. Two conditions were tested. Firstly, blind sailors consulted the updated ship positions on the virtual map presented in an allocentric frame of reference (i.e. facing north). In the second case, they used the forced-feedback device in an egocentric frame of reference (i.e. facing the ship headings). Spatial performance tended to show that the egocentric condition was better for controlling the course during displacement, whereas the allocentric condition was more efficient for building mental representation and remembering it after the navigation task

Conception et évaluation de techniques d'exploration interactives non visuelles pour les cartes géographiques

National audienceLa consultation des cartes géographiques sur tablette tactile en l'absence de vision pose différentes questions dont celle des stratégies d'exploration. Il a été identifié une phase d'investigation, qui vise à découvrir les éléments présents sur la carte, et une phase de mémorisation, qui vise à construire une représentation mentale de cet espace géographique. Il s'agit de deux processus cognitifs bien distincts impliquant des activités différentes pour les utilisateurs déficients visuels. Alors que l'investigation nécessite une perception large et rapide, la mémorisation requiert une perception précise contenant des points de référence. Cette étude vise à concevoir et évaluer différents modes d'interaction pour la facilitation de ces deux phases. ABSTRACT. Exploring maps on tablets in the absence of vision raises many questions such as the question of the efficiency of exploration strategies. Two phases have been identified: an investigation phase, which aims to discover the items on the map, and a memorization phase, which aims to build a mental representation of the geographic space. These are two distinct cognitive processes involving different activities for users. While investigation requires a broad and rapid perception, memorization requires an accurate perception containing reference points. This study aims to develop and evaluate different interaction techniques for facilitating investigation and memorization

Accuracy and Coordination of Spatial Frames of Reference during the Exploration of Virtual Maps: Interest for Orientation and Mobility of Blind People?

Even if their spatial reasoning capabilities remain quite similar to those of sighted people, blind people encounter difficulties in getting distant information from their surroundings. Thus, whole body displacements, tactile map consultations, or auditory solutions are needed to establish physical contacts with their environment. Therefore, the accuracy of nonvisual spatial representations heavily relies upon the efficiency of exploration strategies and the ability to coordinate egocentric and allocentric spatial frames of reference. This study aims to better understand the mechanisms of this coordination without vision by analyzing cartographic exploration strategies and assessing their influence on mental spatial representations. Six blind sailors were immersed within a virtual haptic and auditory maritime environment. They were required to learn the layout of the map. Their movements were recorded and we identified some exploration strategies. Then they had to estimate the directions of six particular seamarks in aligned and misaligned situations. Better accuracy and coordination were obtained when participants used the “central point of reference” strategy. Our discussion relative to the articulation between geometric enduring representations and salient transient perceptions provides implications on map reading techniques and on mobility and orientation programs for blind people

Éditorial

À presque 40 ans, la revue Travail et Emploi était toujours parée des atours de ses 20 ans. Aussi avons-nous pensé qu’à l’âge de la plénitude, il était temps de lui insuffler une nouvelle énergie visuelle qui corresponde davantage à l’univers académique dans lequel elle s’inscrit. Fruit d’un travail collectif au sein du comité de rédaction, mais aussi avec la société qui l’a réalisée et a imaginé le graphisme de couverture, notre maquette modernisée marque une nouvelle étape dans la vie de la..

Echinococcus vogeli Infection in a Hunter, French Guiana

Echinococcus vogeli infection in a hunter from the rain forest of French Guiana was confirmed by imaging and mitochondrial DNA sequence analysis. Serologic examination showed typical patterns for both alveolar and cystic echinococcosis. Polycystic echinococcis caused by E. vogeli may be an emerging parasitic disease in Central and South America

Taking into account sensory knowledge: the case of geo-techologies for children with visual impairments

This paper argues for designing geo-technologies supporting non-visual sensory knowledge. Sensory knowledge refers to the implicit and explicit knowledge guiding our uses of our senses to understand the world. To support our argument, we build on an 18 months field-study on geography classes for primary school children with visual impairments. Our findings show (1) a paradox in the use of non-visual sensory knowledge: described as fundamental to the geography curriculum, it is mostly kept out of school; (2) that accessible geo-technologies in the literature mainly focus on substituting vision with another modality, rather than enabling teachers to build on children's experiences; (3) the importance of the hearing sense in learning about space. We then introduce a probe, a wrist-worn device enabling children to record audio cues during field-trips. By giving importance to children's hearing skills, it modified existing practices and actors' opinions on non-visual sensory knowledge. We conclude by reflecting on design implications, and the role of technologies in valuing diverse ways of understanding the world

EuReCa ONE—27 Nations, ONE Europe, ONE Registry A prospective one month analysis of out-of-hospital cardiac arrest outcomes in 27 countries in Europe

AbstractIntroductionThe aim of the EuReCa ONE study was to determine the incidence, process, and outcome for out of hospital cardiac arrest (OHCA) throughout Europe.MethodsThis was an international, prospective, multi-centre one-month study. Patients who suffered an OHCA during October 2014 who were attended and/or treated by an Emergency Medical Service (EMS) were eligible for inclusion in the study. Data were extracted from national, regional or local registries.ResultsData on 10,682 confirmed OHCAs from 248 regions in 27 countries, covering an estimated population of 174 million. In 7146 (66%) cases, CPR was started by a bystander or by the EMS. The incidence of CPR attempts ranged from 19.0 to 104.0 per 100,000 population per year. 1735 had ROSC on arrival at hospital (25.2%), Overall, 662/6414 (10.3%) in all cases with CPR attempted survived for at least 30 days or to hospital discharge.ConclusionThe results of EuReCa ONE highlight that OHCA is still a major public health problem accounting for a substantial number of deaths in Europe.EuReCa ONE very clearly demonstrates marked differences in the processes for data collection and reported outcomes following OHCA all over Europe. Using these data and analyses, different countries, regions, systems, and concepts can benchmark themselves and may learn from each other to further improve survival following one of our major health care events

Blind sailors & Open-Sea-Marks

International audienc