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Search Results: 1 - 10 of 455091 matches for " Jérémy Frey "
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Heart Rate Monitoring as an Easy Way to Increase Engagement in Human-Agent Interaction
Jérémy Frey
Computer Science , 2014,
Abstract: Physiological sensors are gaining the attention of manufacturers and users. As denoted by devices such as smartwatches or the newly released Kinect 2 -- which can covertly measure heartbeats -- or by the popularity of smartphone apps that track heart rate during fitness activities. Soon, physiological monitoring could become widely accessible and transparent to users. We demonstrate how one could take advantage of this situation to increase users' engagement and enhance user experience in human-agent interaction. We created an experimental protocol involving embodied agents -- "virtual avatars". Those agents were displayed alongside a beating heart. We compared a condition in which this feedback was simply duplicating the heart rates of users to another condition in which it was set to an average heart rate. Results suggest a superior social presence of agents when they display feedback similar to users' internal state. This physiological "similarity-attraction" effect may lead, with little effort, to a better acceptance of agents and robots by the general public.
Review of the Use of Electroencephalography as an Evaluation Method for Human-Computer Interaction
Jérémy Frey,Christian Mühl,Fabien Lotte,Martin Hachet
Computer Science , 2013,
Abstract: Evaluating human-computer interaction is essential as a broadening population uses machines, sometimes in sensitive contexts. However, traditional evaluation methods may fail to combine real-time measures, an "objective" approach and data contextualization. In this review we look at how adding neuroimaging techniques can respond to such needs. We focus on electroencephalography (EEG), as it could be handled effectively during a dedicated evaluation phase. We identify workload, attention, vigilance, fatigue, error recognition, emotions, engagement, flow and immersion as being recognizable by EEG. We find that workload, attention and emotions assessments would benefit the most from EEG. Moreover, we advocate to study further error recognition through neuroimaging to enhance usability and increase user experience.
TOBE: Tangible Out-of-Body Experience
Renaud Gervais,J{é}r{é}my Frey,Alexis Gay,Fabien Lotte,Martin Hachet
Computer Science , 2015, DOI: 10.1145/2839462.2839486
Abstract: We propose a toolkit for creating Tangible Out-of-Body Experiences: exposing the inner states of users using physiological signals such as heart rate or brain activity. Tobe can take the form of a tangible avatar displaying live physiological readings to reflect on ourselves and others. Such a toolkit could be used by researchers and designers to create a multitude of potential tangible applications, including (but not limited to) educational tools about Science Technologies Engineering and Mathematics (STEM) and cognitive science, medical applications or entertainment and social experiences with one or several users or Tobes involved. Through a co-design approach, we investigated how everyday people picture their physiology and we validated the acceptability of Tobe in a scientific museum. We also give a practical example where two users relax together, with insights on how Tobe helped them to synchronize their signals and share a moment.
Teegi: Tangible EEG Interface
Jérémy Frey,Renaud Gervais,Stéphanie Fleck,Fabien Lotte,Martin Hachet
Computer Science , 2014, DOI: 10.1145/2642918.2647368
Abstract: We introduce Teegi, a Tangible ElectroEncephaloGraphy (EEG) Interface that enables novice users to get to know more about something as complex as brain signals, in an easy, en- gaging and informative way. To this end, we have designed a new system based on a unique combination of spatial aug- mented reality, tangible interaction and real-time neurotech- nologies. With Teegi, a user can visualize and analyze his or her own brain activity in real-time, on a tangible character that can be easily manipulated, and with which it is possible to interact. An exploration study has shown that interacting with Teegi seems to be easy, motivating, reliable and infor- mative. Overall, this suggests that Teegi is a promising and relevant training and mediation tool for the general public.
Estimating Visual Comfort in Stereoscopic Displays Using Electroencephalography: A Proof-of-Concept
Jérémy Frey,Aurélien Appriou,Fabien Lotte,Martin Hachet
Computer Science , 2015,
Abstract: With stereoscopic displays, a depth sensation that is too strong could impede visual comfort and result in fatigue or pain. Electroencephalography (EEG) is a technology which records brain activity. We used it to develop a novel brain-computer interface that monitors users' states in order to reduce visual strain. We present the first proof-of-concept system that discriminates comfortable conditions from uncomfortable ones during stereoscopic vision using EEG. It reacts within 1s to depth variations, achieving 63% accuracy on average and 74% when 7 consecutive variations are measured. This study could lead to adaptive systems that automatically suit stereoscopic displays to users and viewing conditions.
Assessing the Zone of Comfort in Stereoscopic Displays using EEG
Jérémy Frey,Léonard Pommereau,Fabien Lotte,Martin Hachet
Computer Science , 2014, DOI: 10.1145/2559206.2581191
Abstract: The conflict between vergence (eye movement) and accommodation (crystalline lens deformation) occurs in every stereoscopic display. It could cause important stress outside the "zone of comfort", when stereoscopic effect is too strong. This conflict has already been studied using questionnaires, during viewing sessions of several minutes. The present pilot study describes an experimental protocol which compares two different comfort conditions using electroencephalography (EEG) over short viewing sequences. Analyses showed significant differences both in event-related potentials (ERP) and in frequency bands power. An uncomfortable stereoscopy correlates with a weaker negative component and a delayed positive component in ERP. It also induces a power decrease in the alpha band and increases in theta and beta bands. With fast responses to stimuli, EEG is likely to enable the conception of adaptive systems, which could tune the stereoscopic experience according to each viewer.
Continuous Mental Effort Evaluation during 3D Object Manipulation Tasks based on Brain and Physiological Signals
Dennis Wobrock,Jérémy Frey,Delphine Graeff,Jean-Baptiste De La Rivière,Julien Castet,Fabien Lotte
Computer Science , 2015,
Abstract: Designing 3D User Interfaces (UI) requires adequate evaluation tools to ensure good usability and user experience. While many evaluation tools are already available and widely used, existing approaches generally cannot provide continuous and objective measures of usa-bility qualities during interaction without interrupting the user. In this paper, we propose to use brain (with ElectroEncephaloGraphy) and physiological (ElectroCardioGraphy, Galvanic Skin Response) signals to continuously assess the mental effort made by the user to perform 3D object manipulation tasks. We first show how this mental effort (a.k.a., mental workload) can be estimated from such signals, and then measure it on 8 participants during an actual 3D object manipulation task with an input device known as the CubTile. Our results suggest that monitoring workload enables us to continuously assess the 3DUI and/or interaction technique ease-of-use. Overall, this suggests that this new measure could become a useful addition to the repertoire of available evaluation tools, enabling a finer grain assessment of the ergonomic qualities of a given 3D user interface.
Cyclones and Societies in the Mascarene Islands 17th-20th Centuries  [PDF]
Emmanuel Garnier, Jérémy Desarthe
American Journal of Climate Change (AJCC) , 2013, DOI: 10.4236/ajcc.2013.21001

The recent IPCC-SREX report focuses on the impact of extreme weather events on societies and underlines the absence of reliable data to assert a solid link between them and the current global climate change. Thanks to the unpublished materials that are contained in historic archives, this article suggests studying the cyclones which affected the Mascarene islands between 1654 and 2007 and which supply us with a catalog of hitherto unpublished events. Inspired by the Simpson-Saffir hurricanes Wind Scale, the research proposes a relative evaluation of the extremes of the region. It underlines the big fluctuations in the last three centuries and partially answers the current debate on the reliability of the data in relation to hurricanes and their link with the contemporary climate. The available archives show that this type of meteorological event has occurred frequently during the relevant historical period and that for that reason, has given rise to original strategies of adaptation on the part of the societies affected. The results presented here constitute new and reliable data which could make an important contribution to the decision-makers and to climatologists trying to design strategies which the populations of small islands facing the climatic hazards of the future will have to adopt.

Des monts et des mondes: ce que le corps des marcheurs solitaires fait à la sociologie
Jérémy Damian
m@gm@ , 2009,
Abstract: En faisant de l’expérience de la marche solitaire un détour permettant d’éclairer les racines sensibles et la dimension corporelle du vivre-ensemble que la culture moderne refoule et rend inopérantes, l’enjeu de notre propos est le suivant: caractériser la manière dont l’expérience sensible participe à la formation de collectifs . Les marcheurs solitaires, par leur désir de fuite (récréation sociale), recomposent dans l’environnement de la marche tout un tissu de relations aux êtres et aux choses qu’ils croisent et avec lesquels ils se sentent liés (re-création sociale). C’est à l’examen de ce lien, entre fantasme et réalité, que nous nous livrerons: au-delà de la récréation sociale ce serait bien la joie du corps, d’une part celle de se redécouvrir un corps plein de vitalité à partir duquel sentir pleinement le monde, et de l’autre celle de se vivre comme articulé à une multitude d’ autres , qui constituerait le fondement de l’expérience solitaire de la marche. Les marcheurs se vivent comme de simples composantes d’un ensemble plus vaste au sein duquel aucune discrimination véritable n’est établie entre humains et non-humains. Pour qu’il y ait société, il faut qu’il y ait du (des) corps, il faut également des passions, de l’affect. A tenir compte d’une assemblée élargie de tels corps (humains, vivants, matériels, naturels…), se forment sous les yeux du marcheurs et du sociologue, avec évidence, de nouveaux collectifs hybrides où le naturel et le culturel s’indéterminent l’un l’autre pour se fondre et se rendre tolérant l’un à l’autre.
Blake et le Laoco n : pour une poétique du Mouvement
Jérémy Lambert
Image and Narrative : Online Magazine of the Visual Narrative , 2010,
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