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This article examines how the process of adopting or rejecting liberated company management practices is constructed; this process is often portrayed as long, difficult, and complex. To address this question, we use a qualitative study based on narratives (Dumez, 2016) from two cases of companies in the process of liberation. Our results show that it is important for the process to be doubly coherent in order to sustain the adoption of liberation practices. We first show that the process involves three bundles of practices. These communication, support, and empowerment bundles have content coherence, i.e., configurations of interdependent practices. We then observe temporal coherence in the adoption of management practices, i.e., the preferred timeline for sustaining liberation. Beyond this double coherence, our analysis shows that adapting the process to the idiosyncrasies of the organisation is still necessary.

The effects of management innovations on performance are understudied, especially with respect to social performance. Our study contributes to this debate by examining the potential benefits of adopting liberation management, a typical management innovation when it comes to addressing a social performance gap. If employee empowerment is regarded as a lever of social performance in liberated companies, the extant literature does not reach a consensus on these alleged positive effects either. Our quantitative method – a quasi-experiment comparing two units (one liberated and another non-liberated) of a French industrial company – allows us to conclude that three liberation practices can in fact have a positive effect on social performance: participative decision-making, personalised support, and right to make mistakes.

L’objectif de cet article est de comprendre comment se construit le processus d’adoption ou de rejet des pratiques managériales de l’entreprise libérée, souvent dépeint comme un processus à la fois complexe, long et difficile. Pour répondre à cette question, nous mobilisons une étude qualitative basée sur les narrations (Dumez, 2016) de deux cas de libération d’entreprises. Nos résultats mettent en évidence l’importance d’une double cohérence du processus pour pérenniser l’adoption de l’entreprise libérée. D’une part, nous montrons que ce processus est composé de trois grappes de pratiques : une grappe de communication, une grappe d’accompagnement et une grappe d’autonomisation présentant une cohérence de contenu, à savoir des configurations de pratiques interdépendantes. D’autre part, nous observons une cohérence temporelle dans l’adoption des pratiques managériales, c’est-à-dire une chronologie à privilégier pour pérenniser la libération. Au-delà de cette double cohérence, l’analyse indique qu’une adaptation du processus aux idiosyncrasies de l’organisation semble toutefois nécessaire.

L'entreprise â mission : un modele de gouvernance pour l'innovation A propos du livre de Kevin LEVILLAIN, Les Entreprises â mission - Un modele de gouvernance pour ¡'innovation, Paris, Vuibert, 2017.

Cosmological and astrophysical surveys in various wavebands, in particular from the radio to the far-infrared, offer a unique view of the universe's properties and the formation and evolution of its structures. After a preamble on the so-called tension problem, which occurs when different types of data are used to determine cosmological parameters, we discuss the role of fast radio bursts in cosmology, in particular for the missing baryon problem, and the perspectives from the analysis of the 21 cm redshifted line from neutral hydrogen. We then describe the Planck Legacy Archive, its wealth of scientific information and next developments, and the promising perspectives expected from higher resolution observations, in particular for the analysis of the thermal Sunyaev-Zel'dovich effect. Three cosmological results of the Planck mission are presented next: the implications of the map of Comptonization fluctuations, the dipole analysis from cross-correlating cosmic microwave background anisotropy and Comptonization fluctuation maps, and the constraints on the primordial tensor-to-scalar perturbation ratio. Finally, we discuss some future perspectives and alternative scenarios in cosmology, such as the study of the Lorentz invariance violation with the cosmic microwave background polarization, the introduction of new gravitational degrees of freedom to solve the dark matter problem, and the exploitation of the magnification bias with high-redshift sub-millimeter galaxies to constrain cosmological parameters.

Uncovering the rich and intricate characteristics of three-dimensional (3D) magnetic textures is essential for functional materials such as magnetic multilayers, where the delicate balance of various magnetic interactions leads to complex 3D spin arrangements. Among these textures, skyrmionic cocoons-tubular 3D magnetic structures characterized by a closed magnetization surface wrapping around a core-have emerged as particularly intriguing. Stabilized by competing magnetic interactions, these textures reside within a fraction of the thickness of the magnetic material and exhibit a typical lateral size of approximately 100 nm. Here, we present a vector tomographic reconstruction of the 3D magnetization in aperiodic Pt/Co/Al chiral multilayers, where skyrmionic cocoons have been recently reported. Using soft X-ray Holography with Extended Reference by Autocorrelation Linear Differential Operator (HERALDO), we acquire tomographic projections of the magnetic configuration and reconstruct the full 3D magnetization vector field with a spatial resolution of approximately 30 nm, as determined by Fourier shell correlation (FSC). This resolution allows us to observe critical features of the cocoons, such as their vertical misalignment and their overall chirality. Our findings demonstrate that HERALDO-based vector tomography is a powerful approach for revealing the internal structure and vertical extent of these nanoscale magnetic textures, offering new experimental insights into their intrinsic behavior.

Topological magnetic textures are particle-like spin configurations stabilized by competing interactions. Their formation is commonly attributed to fluctuation-driven, first-order nucleation processes requiring activation over a topological energy barrier. Here, we demonstrate an alternative barrier- and fluctuation-free pathway for nucleating topological magnetic textures, triggered in our experiments by an excitation-induced spin reorientation transition. By combining x-ray imaging, scattering and micromagnetic simulations, we show that the system follows a deterministic cascade of symmetry-breaking phase transitions after excitation. First, the system undergoes a second-order phase transition from a homogeneous state to weak stripe domains, then a first-order transition to topologically trivial bubbles, and finally a topological switching event into skyrmionic textures. Through simulations, we generalize our findings and demonstrate that this pathway is active in a vast range of low-anisotropy materials. This previously unrecognized, spontaneous transition pathway suggests strategies for rapid, low-energy generation of topological spin textures and points to a general role of intrinsic modulational instabilities in phase transitions beyond magnetism.

In recent years, significant progress has been made in building new galaxy clusters samples, at low and high redshifts, from wide-area surveys, particularly exploiting the Sunyaev--Zel'dovich (SZ) effect. A large effort is underway to identify and characterize these new systems with optical/NIR and X-ray facilities, thus opening new avenues to constraint cosmological models using structure growth and geometrical tests. A census of galaxy clusters sets constraints on reionization mechanisms and epochs, which need to be reconciled with recent limits on the reionization optical depth from cosmic microwave background (CMB) experiments. Future advances in SZ effect measurements will include the possibility to (unambiguously) measure directly the kinematic SZ effect, to build an even larger catalogue of galaxy clusters able to study the high redshift universe, and to make (spatially-)resolved galaxy cluster maps with even spectral capability to (spectrally-)resolve the relativistic corrections of the SZ effect.