Publications scientifiques de l'Université de Reims Champagne-Ardenne
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Stabilisation indirecte de systèmes d'ondes couplées
No full textInternational audienceIn this paper, we study the indirect stabilization problem for a system of two coupled semilinear wave equations with internal damping in a bounded domain in . The nonlinearity is assumed to be subcritical, defocusing and analytic. Under geometric control condition on both coupling and damping regions, we establish the exponential energy decay rate
L'efficacité de la protection de l'enfance en France et à l'échelle européenne
No full textInternational audienceLes différents rapports, communiqués, recommandations, bilans, avis et notes publiés en protection de l’enfance font état d’un profond malaise et d’une situation alarmante. Les interviews et les investigations menées pendant la recherche que vient clore cet ouvrage (octobre 2022-juin 2024) l’ont confirmé. Une crise de sens, tout d’abord, interroge le rôle des acteurs et institutionnels ainsi que les objectifs poursuivis qui ne sont pas clairs. Le droit protège-t-il encore l’enfant? L’accroissement continu des chiffres de l’enfance en danger permet d’en douter. Le système de protection de l’enfance se trouve par contrecoup en surchauffe. On observe à ce stade une crise structurelle, signe d’un désordre dans l’organisation institutionnelle et l’ordre juridique. L’efficacité de la protection de l’enfance s’en ressent. Les questions de lisibilité du droit, d’empilement des réformes et d’indépendance de la protection de l’enfance, par exemple, méritaient d’être posées et confrontées, dans une approche pluridisciplinaire, à d’autres ordonnancements juridiques. Sans prétendre à l’exhaustivité en raison de l’ampleur et de la complexité du sujet, l’ouvrage essaie d’apporter des pistes de réflexion permettant de mieux cerner les manifestations, les causes et des réponses à l’actuel phénomène de crise en protection de l’enfance
A longitudinal person-centered investigation of individual employees’ team boosting behaviors
No full textInternational audienceThis person-centered investigation sought to identify the nature of employees' profiles of boosting behaviors (i.e., energizing, mood-enhancing, and uniting behaviors seeking to support the functioning of their team). We also examined the stability of these profiles over time, and of their associations with a series of predictors (i.e., availability expectations, social challenge stressors, telepressure, and harassment) and outcomes (i.e., affective commitment to the organization and to coworkers, and organizational citizenship behaviors directed towards individuals). We identified five distinct profiles among a sample of 415 employees who completed the same set of measures twice across a time interval of three months: Very Low Boosting Behaviors, High Boosting Behaviors, Low Boosting Behaviors, Very High Boosting Behaviors, and Average Boosting Behaviors. These profiles were moderately to highly stable over time. Social challenge stressors and telepressure were associated with a lower likelihood of membership into the Very Low Boosting Behaviors profile. All outcomes also differed across profiles, with the most adaptive outcomes being associated with the Very High Boosting Behaviors profile and the most maladaptive outcomes being associated with the Very Low Boosting Behaviors profile
Deux nouvelles suites de nombres entiers liées aux intersections routières et aux nombres de Catalan
No full textSubmitted to the Journal of Integer Sequences on November 11, 2023.Two typos have been corrected.International audienceThe lonely singles sequence represents the number of noncrossing partitions of the finite set {1,. .. , n} in which no pair of singletons {i} and {j} can be merged into the pair {i, j} so that the partition stays noncrossing. The marriageable singles sequence represents the number of all the other noncrossing partitions and is the difference between the Catalan numbers sequence and the lonely singles sequence. The 14 first terms of these sequences are given, as well as some of their properties. These sequences appear when one wants to count the number of ways to cross simultaneously certain road intersections.La suite des célibataires solitaires représente le nombre de partitions non croisées de l'ensemble fini {1, ... , n} dans lesquelles aucune paire de singletons {i} et {j} ne peut être fusionnée en la paire {i, j} en laissant la partition non croisée. La suite des célibataires mariables représente le nombre de toutes les autres partitions non croisées et constitue la différence entre la suite des nombres de Catalan et la suite des célibataires solitaires. Les 14 premiers termes de ces suites sont donnés, ainsi que certaines de leurs propriétés. Ces suite apparaissent lorsqu'on cherche à dénombrer le nombre de manières possibles de traverser simultanément certaines intersections routières
Subordinates' perceptions of the need- supportive, need-thwarting, and need- indifferent behaviors used by their supervisors: A person-centered investigation
No full textInternational audienceAdopting a recent tripartite operationalization of subordinates’ perceptions of their supervisors’ behaviors, anchored in Self-Determination Theory (SDT), this person-centered study considers the co-existence of subordinates’ perceptions of their supervisors’ need-supportive, -thwarting, and -indifferent behaviors. Moreover, we also consider how these various combinations (or profiles) of perceived supervisor behaviors relate to subordinates’ levels of work motivation, well-being, attitudes, behaviors, and work-home functioning. A sample of 596 French employees (Mage = 31.22; 73.5% women) participated in this study. Our results revealed six profiles of subordinates characterized by distinct configurations of perceived need-related behaviors from supervisors (Globally Unfavorable; Globally Favorable and Supportive; Moderate-Indifferent; Moderately Favorable and Involved; Moderately Unfavorable; Moderately Favorable). These profiles displayed well-differentiated patterns of associations, consistent with our expectations, with all of the outcomes considered in this study. These findings underscored the key role of subordinates’ specific perceptions of need-supportive, -thwarting, and -indifferent behaviors, over and above their global perceptions of their supervisors’ behaviors, in determining how beneficial or harmful supervisory profiles are. In particular, our results also highlighted the critical role played by need-indifferent behaviors, which prove to be a very important, and yet typically neglected, component of subordinates’ perceptions of their supervisors’ behaviors
Early Endosome Disturbance and Endolysosomal Pathway Dysfunction in Duchenne Muscular Dystrophy
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Le montage comme levier introspectif dans Moonlight (2016) de Barry Jenkins
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Repenser la/les voix de l’esclave dans 12 Years a Slave (2013, Steve McQueen)
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Collaborative-Iterative Digital Twin Benchmarking
No full textInternational audienceCollaborative-Iterative Digital Twin Benchmarkin
