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Due to the current events related to Covid-19, the conference originally planned for July 2020 has been postponed to April 7-9, 2021.The conference will be organized virtually by videoconference. ORAL; International audience; In this paper, a study of UWB receivers in terms of detection theory is presented. The UWB radar which is presented in many works previously [1]-[3] has many applications. For road UWB radar application, the receiver based on correlation is the optimum receiver [4]. In fact, it maximizes the probability of detection. We will consider, in this study, a correlator receiver based on a threshold detection method. As in narrowband [5] [6], we will describe the theoretical study that evaluates the performance of the UWB receiver based on correlation in terms of detection and false alarm probabilities. Then a study of curves showing threshold receiver operating characteristics (ROC system), based on correlation and destined to be used for a UWB radar is presented. The study is original because it is presented for the first time in a UWB radar system.

International audience

International audience; La halle SayFood (AgroParisTech-INRAE) rassemble 50 pilotes, représentant les appareils utilisés dans l'industrie agroalimentaire. Ces pilotes sont utilisés par des chercheurs, enseignants, personnels techniques, étudiants, doctorants et stagiaires. Chaque pilote peut regrouper plusieurs équipements ; avec les équipements périphériques, ce sont donc 200 appareils, pour lesquels il devenait impératif de réaliser une documentation technique centralisée. Dokiel s'est imposé comme le choix idéal pour cette création collaborative. La crise sanitaire a été le catalyseur de cette démarche, permettant d'accélérer l'adhésion des enseignants-chercheurs à l'usage d'une chaîne éditoriale, ponctuellement détournée pour contribuer à la mise en place de TP à distance.

En raison de la situation sanitaire actuelle (Covid-19), WACAI est reporté du 02 au 04/06/2021; International audience; L’objectif de cet article est de passer en revue la littérature ayant pour sujet l’incarnation en réalité augmentée et les systèmes permettant de l’expérimenter. Il commence par préciser ce qu’est un “avatar” dans ce contexte et introduit les principaux concepts de la notion d’incarnation. Il décrit ensuite les travaux de recherche qui ont contribué à mieux la comprendre et à la mettre en place au sein d’un environnement réel. Dans cette partie, les connaissances sur les composantes du sentiment d’incarnation et sur les facteurs techniques qui l’affectent sont exposées ainsi que les technologies et modes de visualisation utilisés pour l’étudier. Pour terminer, cet article résume et discute de ces résultats afin d’offrir des perspectives de recherches.

International audience

International audience; Circular Economy (CE) is commonly proposed as a means to advance towards the Sustainable Development Goals. Design thinking (DT) has been identified as an innovative problemsolving approach, capable of addressing complex challenges, such as the CE, through multidisciplinary collaboration. Currently, the spaces for multi-stakeholder collaboration have been affected by Covid-19 restrictions, forcing organizations to develop online collaboration capabilities. Accordingly, this study aims to assess the effectiveness of the application of DT to generate CE-based solutions to address a sustainability challenge in an online setting. The assessment particularly addresses the extent to which a purposefully adapted DT process allows to conceptualize sustainability solutions, and, the user experiences in a digital collaboration environment. This research presents the findings obtained from an online DT workshop focused on proposing circular business models to improve the sustainability impacts of urban mobility in the city of Graz, Austria. The event involved 39 sustainability experts from academia, industry, public sector and NGOs, participating in five teams, each led by a workshop facilitator. Three specific activities have been elaborated to embed a focus on sustainability, which are combined with traditional DT exercises, and adapted to a digital environment. We report the outcomes of the online workshop and reflect on the adapted method strengths and weaknesses. DT is supported as a plausible method to conceptualize CE-based solutions, however, sustainability aspects need to be embedded throughout the problem-solving process.

International audience; The COVID-19 pandemic has thrust preprints into the spotlight, highlighting their advantages and disadvantages. The lack of peer review allows publication to occur with unprecedented speed, but this has raised concerns among biomedical scientists about the quality of the reported research. The study had three primary objectives in regard to COVID-19 preprints: 1. Test the feasibility of automatically and publicly evaluating preprints on a large scale; 2. Assess the prevalence of common quality problems in preprints; and 3. Compare the quality of preprints to published papers. While a substantial fraction (36.2%) of preprints addressed study limitations, the proportion that met other quality criteria was much lower, with only 20% addressing sex as a variable, ~14% sharing open code or data, 7.6% including non-colorblind safe images, and 7.3% showing misleading bar graphs. Both authors and non-authors interacted with the automated Tweets containing reports for preprints. This project shows that it is feasible to conduct large-scale automated screening of preprints for common quality criteria and provide feedback to study authors and readers before publication. These reports can publicly raise awareness about factors that affect study quality and reproducibility, while helping authors to present their research in a more transparent and reproducible manner.

International audience; La complexité de la pandémie de COVID-19 révèle d’importants débats méthodologiques quant à l’articulation de différentes approches de recherche. L’objectif de cette communication est de présenter le projet CoviZion, porté par les laboratoires CeReS et Xlim de l’Université de Limoges, pour mettre en évidence la nécessité d’une approche pluridisciplinaire dans l’étude holistique de la crise sanitaire actuelle. Cette démarche apparait comme indispensable pour faire face à l’ennemi invisible de SARS-CoV-2 et de ses conséquences à l’effet domino. En se basant sur la démarche innovante de co-design et de l’intelligence collective, nous proposons des pistes de réflexion concrets pour une meilleure intégration de l’interdisciplinarité qui permet de tendre vers une approche transdisciplinaire dans l’étude des phénomènes sociétaux actuels. Les implications pour une meilleure gestion des crises sanitaires, actuelles et futures, seront discutées.

Biometrics has for objective to identify or verify the identity of an individual based on morphological or behavioral characteristics. A biometric system can be attacked by presenting a biometric data to the capture subsystem with the goal of interfering it, that is called a presentation attack. Covid, panther, shadow monster and dragon are the investigated presentation attacks associated to the Doddington Zoo Menagerie (which classify users in different categories considering their performance behavior when using biometric systems). In this work, we examined the robustness of each genuine class of the biometric menagerie against the proposed presentation attacks. The achieved experiments are applied to the keystroke dynamics modality. Owing to the adaptive strategy, we depicted each genuine category that is most vulnerable to a specific presentation attack class. We find that the impact of covid, panther, shadow monster and dragon attempts are more pronounced when compared to chameleons, worms, doves and phantoms classes respectively. The obtained results, point out that adding imposter labels to Doddington zoo may lead to a better assessment of biometric authentication systems and promotes the interpretation of their performances.

Since the beginning of the COVID-19 pandemic, instructors and students worldwide have been faced with the challenges of shifting from face-to-face to remote education. Due to universities short notice closure, synchronous online instruction through videoconferencing platforms has been the favoured choice for most instructors. In this paper, we report on our experience teaching an online course using Zoom videoconferencing platform. We conduct a two-fold analysis of online synchronous teaching: 1) We first compare the engagement and feedback features offered by Zoom with traditional classroom interactions. We show that some features are challenging to transpose to traditional face-to-face classroom setting while others may require additional hardware and software. 2) We analyze Zoom’s attention tracker tool and evaluate the effectiveness of the attentiveness score as an effective grading metric. Our results show no apparent relationship between the students’ attention as measured by Zoom and their performance. We also show that the use of recordings increases while attention decline during live classes.